Update changelog

Co-authored-by: Néstor Pérez <25409753+prryplatypus@users.noreply.github.com>
Co-authored-by: Ryu juheon <saidbysolo@gmail.com>

.codeclimate.yml

@@ -1,5 +1,7 @@
 exclude_patterns:
   - "sanic/__main__.py"
+  - "sanic/application/logo.py"
+  - "sanic/application/motd.py"
   - "sanic/reloader_helpers.py"
   - "sanic/simple.py"
   - "sanic/utils.py"
@@ -8,5 +10,19 @@ exclude_patterns:
   - "docker/"
   - "docs/"
   - "examples/"
-  - "hack/"
   - "scripts/"
+  - "tests/"
+checks:
+  argument-count:
+    enabled: false
+  file-lines:
+    config:
+      threshold: 1000
+  method-count:
+    config:
+      threshold: 40
+  complex-logic:
+    enabled: false
+  method-complexity:
+    config:
+      threshold: 10

.coveragerc

@@ -3,6 +3,9 @@ branch = True
 source = sanic
 omit =
     site-packages
+    sanic/application/logo.py
+    sanic/application/motd.py
+    sanic/cli
     sanic/__main__.py
     sanic/reloader_helpers.py
     sanic/simple.py

.github/workflows/codeql-analysis.yml

@@ -2,14 +2,20 @@ name: "CodeQL"
 
 on:
   push:
-    branches: [ main ]
+    branches:
+      - main
+      - "*LTS"
   pull_request:
-    branches: [ main ]
+    branches:
+      - main
+      - "*LTS"
+    types: [opened, synchronize, reopened, ready_for_review]
   schedule:
     - cron: '25 16 * * 0'
 
 jobs:
   analyze:
+    if: github.event.pull_request.draft == false
     name: Analyze
     runs-on: ubuntu-latest
 

.github/workflows/coverage.yml

@@ -1,19 +1,16 @@
 name: Coverage check
-# on:
-#   push:
-#     branches:
-#       - main
-#     tags:
-#       - "!*" # Do not execute on tags
-#     paths:
-#       - sanic/*
-#       - tests/*
-#   pull_request:
-#     paths:
-#       - "!*.MD"
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+      - "*LTS"
+    tags:
+      - "!*" # Do not execute on tags
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
 jobs:
   test:
+    if: github.event.pull_request.draft == false
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:

.github/workflows/pr-bandit.yml

@@ -3,9 +3,12 @@ on:
   pull_request:
     branches:
       - main
+      - "*LTS"
+    types: [opened, synchronize, reopened, ready_for_review]
 
 jobs:
   bandit:
+    if: github.event.pull_request.draft == false
     name: type-check-${{ matrix.config.python-version }}
     runs-on: ${{ matrix.os }}
     strategy:
@@ -16,6 +19,7 @@ jobs:
           - { python-version: 3.7, tox-env: security}
           - { python-version: 3.8, tox-env: security}
           - { python-version: 3.9, tox-env: security}
+          - { python-version: "3.10", tox-env: security}
     steps:
       - name: Checkout the repository
         uses: actions/checkout@v2

.github/workflows/pr-docs.yml

@@ -3,9 +3,12 @@ on:
   pull_request:
     branches:
       - main
+      - "*LTS"
+    types: [opened, synchronize, reopened, ready_for_review]
 
 jobs:
   docsLinter:
+    if: github.event.pull_request.draft == false
     name: Lint Documentation
     runs-on: ubuntu-latest
     strategy:

.github/workflows/pr-linter.yml

@@ -3,9 +3,12 @@ on:
   pull_request:
     branches:
       - main
+      - "*LTS"
+    types: [opened, synchronize, reopened, ready_for_review]
 
 jobs:
   linter:
+    if: github.event.pull_request.draft == false
     name: lint
     runs-on: ${{ matrix.os }}
     strategy:

.github/workflows/pr-python310.yml

@@ -0,0 +1,47 @@
+name: Python 3.10 Tests
+on:
+  pull_request:
+    branches:
+      - main
+      - "*LTS"
+    types: [opened, synchronize, reopened, ready_for_review]
+
+jobs:
+  testPy310:
+    if: github.event.pull_request.draft == false
+    name: ut-${{ matrix.config.tox-env }}-${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        # os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest]
+        config:
+          - {
+              python-version: "3.10",
+              tox-env: py310,
+              ignore-error-flake: "false",
+              command-timeout: "0",
+            }
+          - {
+              python-version: "3.10",
+              tox-env: py310-no-ext,
+              ignore-error-flake: "true",
+              command-timeout: "600000",
+            }
+    steps:
+      - name: Checkout the Repository
+        uses: actions/checkout@v2
+        id: checkout-branch
+
+      - name: Run Unit Tests
+        uses: harshanarayana/custom-actions@main
+        with:
+          python-version: ${{ matrix.config.python-version }}
+          test-infra-tool: tox
+          test-infra-version: latest
+          action: tests
+          test-additional-args: "-e=${{ matrix.config.tox-env }},-vv=''"
+          experimental-ignore-error: "${{ matrix.config.ignore-error-flake }}"
+          command-timeout: "${{ matrix.config.command-timeout }}"
+          test-failure-retry: "3"

.github/workflows/pr-python37.yml

@@ -3,19 +3,16 @@ on:
   pull_request:
     branches:
       - main
-  push:
-    branches:
-      - main
-    paths:
-      - sanic/*
-      - tests/*
+      - "*LTS"
+    types: [opened, synchronize, reopened, ready_for_review]
 
 jobs:
   testPy37:
+    if: github.event.pull_request.draft == false
     name: ut-${{ matrix.config.tox-env }}-${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
-      fail-fast: false
+      fail-fast: true
       matrix:
         #         os: [ubuntu-latest, macos-latest]
         os: [ubuntu-latest]

.github/workflows/pr-python38.yml

@@ -3,19 +3,16 @@ on:
   pull_request:
     branches:
       - main
-  push:
-    branches:
-      - main
-    paths:
-      - sanic/*
-      - tests/*
+      - "*LTS"
+    types: [opened, synchronize, reopened, ready_for_review]
 
 jobs:
   testPy38:
+    if: github.event.pull_request.draft == false
     name: ut-${{ matrix.config.tox-env }}-${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
-      fail-fast: false
+      fail-fast: true
       matrix:
         # os: [ubuntu-latest, macos-latest]
         os: [ubuntu-latest]

.github/workflows/pr-python39.yml

@@ -3,19 +3,16 @@ on:
   pull_request:
     branches:
       - main
-  push:
-    branches:
-      - main
-    paths:
-      - sanic/*
-      - tests/*
+      - "*LTS"
+    types: [opened, synchronize, reopened, ready_for_review]
 
 jobs:
   testPy39:
+    if: github.event.pull_request.draft == false
     name: ut-${{ matrix.config.tox-env }}-${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
-      fail-fast: false
+      fail-fast: true
       matrix:
         # os: [ubuntu-latest, macos-latest]
         os: [ubuntu-latest]

.github/workflows/pr-type-check.yml

@@ -3,9 +3,12 @@ on:
   pull_request:
     branches:
       - main
+      - "*LTS"
+    types: [opened, synchronize, reopened, ready_for_review]
 
 jobs:
   typeChecking:
+    if: github.event.pull_request.draft == false
     name: type-check-${{ matrix.config.python-version }}
     runs-on: ${{ matrix.os }}
     strategy:
@@ -13,9 +16,10 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         config:
-          - { python-version: 3.7, tox-env: type-checking}
+          # - { python-version: 3.7, tox-env: type-checking}
           - { python-version: 3.8, tox-env: type-checking}
           - { python-version: 3.9, tox-env: type-checking}
+          - { python-version: "3.10", tox-env: type-checking}
     steps:
       - name: Checkout the repository
         uses: actions/checkout@v2

.github/workflows/pr-windows.yml

@@ -1,34 +1,38 @@
-# name: Run Unit Tests on Windows
-# on:
-#   pull_request:
-#     branches:
-#       - main
+name: Run Unit Tests on Windows
+on:
+  pull_request:
+    branches:
+      - main
+      - "*LTS"
+    types: [opened, synchronize, reopened, ready_for_review]
 
-# jobs:
-#   testsOnWindows:
-#     name: ut-${{ matrix.config.tox-env }}
-#     runs-on: windows-latest
-#     strategy:
-#       fail-fast: false
-#       matrix:
-#         config:
-#           - { python-version: 3.7, tox-env: py37-no-ext }
-#           - { python-version: 3.8, tox-env: py38-no-ext }
-#           - { python-version: 3.9, tox-env: py39-no-ext }
-#           - { python-version: pypy-3.7, tox-env: pypy37-no-ext }
+jobs:
+  testsOnWindows:
+    if: github.event.pull_request.draft == false
+    name: ut-${{ matrix.config.tox-env }}
+    runs-on: windows-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - { python-version: 3.7, tox-env: py37-no-ext }
+          - { python-version: 3.8, tox-env: py38-no-ext }
+          - { python-version: 3.9, tox-env: py39-no-ext }
+          - { python-version: "3.10", tox-env: py310-no-ext }
+          - { python-version: pypy-3.7, tox-env: pypy37-no-ext }
 
-#     steps:
-#       - name: Checkout Repository
-#         uses: actions/checkout@v2
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v2
 
-#       - name: Run Unit Tests
-#         uses: ahopkins/custom-actions@pip-extra-args
-#         with:
-#           python-version: ${{ matrix.config.python-version }}
-#           test-infra-tool: tox
-#           test-infra-version: latest
-#           action: tests
-#           test-additional-args: "-e=${{ matrix.config.tox-env }}"
-#           experimental-ignore-error: "true"
-#           command-timeout: "600000"
-#           pip-extra-args: "--user"
+      - name: Run Unit Tests
+        uses: ahopkins/custom-actions@pip-extra-args
+        with:
+          python-version: ${{ matrix.config.python-version }}
+          test-infra-tool: tox
+          test-infra-version: latest
+          action: tests
+          test-additional-args: "-e=${{ matrix.config.tox-env }}"
+          experimental-ignore-error: "true"
+          command-timeout: "600000"
+          pip-extra-args: "--user"

.github/workflows/publish-images.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        python-version: ["3.7", "3.8", "3.9"]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
 
     steps:
       - name: Checkout repository

CHANGELOG.rst

@@ -1,8 +1,26 @@
+.. note::
+
+  CHANGELOG files are maintained in ``./docs/sanic/releases``. To view the full CHANGELOG, please visit https://sanic.readthedocs.io/en/stable/sanic/changelog.html.
+
+
+Version 21.6.1
+--------------
+
+**Bugfixes**
+
+  * `#2178 <https://github.com/sanic-org/sanic/pull/2178>`_
+    Update sanic-routing to allow for better splitting of complex URI templates
+  * `#2183 <https://github.com/sanic-org/sanic/pull/2183>`_
+    Proper handling of chunked request bodies to resolve phantom 503 in logs
+  * `#2181 <https://github.com/sanic-org/sanic/pull/2181>`_
+    Resolve regression in exception logging
+  * `#2201 <https://github.com/sanic-org/sanic/pull/2201>`_
+    Cleanup request info in pipelined requests
+
 Version 21.6.0
 --------------
 
-Features
-********
+**Features**
 
   * `#2094 <https://github.com/sanic-org/sanic/pull/2094>`_
     Add ``response.eof()`` method for closing a stream in a handler
@@ -49,8 +67,7 @@ Features
   * `#2170 <https://github.com/sanic-org/sanic/pull/2170>`_
     Additional methods for attaching ``HTTPMethodView``
 
-Bugfixes
-********
+**Bugfixes**
 
   * `#2091 <https://github.com/sanic-org/sanic/pull/2091>`_
     Fix ``UserWarning`` in ASGI mode for missing ``__slots__``
@@ -66,8 +83,7 @@ Bugfixes
     Fix issue where Blueprint exception handlers do not consistently route to proper handler
 
 
-Deprecations and Removals
-*************************
+**Deprecations and Removals**
 
   * `#2156 <https://github.com/sanic-org/sanic/pull/2156>`_
     Remove config value ``REQUEST_BUFFER_QUEUE_SIZE``
@@ -76,14 +92,12 @@ Deprecations and Removals
   * `#2172 <https://github.com/sanic-org/sanic/pull/2170>`_
     Deprecate StreamingHTTPResponse
 
-Developer infrastructure
-************************
+**Developer infrastructure**
 
   * `#2149 <https://github.com/sanic-org/sanic/pull/2149>`_
     Remove Travis CI in favor of GitHub Actions
 
-Improved Documentation
-**********************
+**Improved Documentation**
 
   * `#2164 <https://github.com/sanic-org/sanic/pull/2164>`_
     Fix typo in documentation
@@ -93,8 +107,7 @@ Improved Documentation
 Version 21.3.2
 --------------
 
-Bugfixes
-********
+**Bugfixes**
 
   * `#2081 <https://github.com/sanic-org/sanic/pull/2081>`_
     Disable response timeout on websocket connections
@@ -105,8 +118,7 @@ Bugfixes
 Version 21.3.1
 --------------
 
-Bugfixes
-********
+**Bugfixes**
 
   * `#2076 <https://github.com/sanic-org/sanic/pull/2076>`_
     Static files inside subfolders are not accessible (404)
@@ -116,8 +128,7 @@ Version 21.3.0
 
 `Release Notes <https://sanicframework.org/en/guide/release-notes/v21.3.html>`_
 
-Features
-********
+**Features**
 
   *
     `#1876 <https://github.com/sanic-org/sanic/pull/1876>`_
@@ -170,8 +181,7 @@ Features
     `#2063 <https://github.com/sanic-org/sanic/pull/2063>`_
     App and connection level context objects
 
-Bugfixes and issues resolved
-****************************
+**Bugfixes**
 
   * Resolve `#1420 <https://github.com/sanic-org/sanic/pull/1420>`_
     ``url_for`` where ``strict_slashes`` are on for a path ending in ``/``
@@ -201,8 +211,7 @@ Bugfixes and issues resolved
     `#2001 <https://github.com/sanic-org/sanic/pull/2001>`_
     Raise ValueError when cookie max-age is not an integer
 
-Deprecations and Removals
-*************************
+**Deprecations and Removals**
 
   *
     `#2007 <https://github.com/sanic-org/sanic/pull/2007>`_
@@ -221,8 +230,7 @@ Deprecations and Removals
   * ``Request.endpoint`` deprecated in favor of ``Request.name``
   * handler type name prefixes removed (static, websocket, etc)
 
-Developer infrastructure
-************************
+**Developer infrastructure**
 
   *
     `#1995 <https://github.com/sanic-org/sanic/pull/1995>`_
@@ -240,8 +248,7 @@ Developer infrastructure
     `#2049 <https://github.com/sanic-org/sanic/pull/2049>`_
     Updated setup.py to use ``find_packages``
 
-Improved Documentation
-**********************
+**Improved Documentation**
 
   *
     `#1218 <https://github.com/sanic-org/sanic/pull/1218>`_
@@ -263,8 +270,7 @@ Improved Documentation
     `#2052 <https://github.com/sanic-org/sanic/pull/2052>`_
     Fix some examples and docs
 
-Miscellaneous
-*************
+**Miscellaneous**
 
   * ``Request.route`` property
   * Better websocket subprotocols support
@@ -310,8 +316,7 @@ Miscellaneous
 Version 20.12.3
 ---------------
 
-Bugfixes
-********
+**Bugfixes**
 
   *
     `#2021 <https://github.com/sanic-org/sanic/pull/2021>`_
@@ -320,8 +325,7 @@ Bugfixes
 Version 20.12.2
 ---------------
 
-Dependencies
-************
+**Dependencies**
 
   *
     `#2026 <https://github.com/sanic-org/sanic/pull/2026>`_
@@ -334,8 +338,7 @@ Dependencies
 Version 19.12.5
 ---------------
 
-Dependencies
-************
+**Dependencies**
 
   *
     `#2025 <https://github.com/sanic-org/sanic/pull/2025>`_
@@ -348,8 +351,7 @@ Dependencies
 Version 20.12.0
 ---------------
 
-Features
-********
+**Features**
 
   *
     `#1993 <https://github.com/sanic-org/sanic/pull/1993>`_
@@ -358,8 +360,7 @@ Features
 Version 20.12.0
 ---------------
 
-Features
-********
+**Features**
 
   *
     `#1945 <https://github.com/sanic-org/sanic/pull/1945>`_
@@ -397,22 +398,19 @@ Features
     `#1979 <https://github.com/sanic-org/sanic/pull/1979>`_
     Add app registry and Sanic class level app retrieval
 
-Bugfixes
-********
+**Bugfixes**
 
   *
     `#1965 <https://github.com/sanic-org/sanic/pull/1965>`_
     Fix Chunked Transport-Encoding in ASGI streaming response
 
-Deprecations and Removals
-*************************
+**Deprecations and Removals**
 
   *
     `#1981 <https://github.com/sanic-org/sanic/pull/1981>`_
     Cleanup and remove deprecated code
 
-Developer infrastructure
-************************
+**Developer infrastructure**
 
   *
     `#1956 <https://github.com/sanic-org/sanic/pull/1956>`_
@@ -426,8 +424,7 @@ Developer infrastructure
     `#1986 <https://github.com/sanic-org/sanic/pull/1986>`_
     Update tox requirements
 
-Improved Documentation
-**********************
+**Improved Documentation**
 
   *
     `#1951 <https://github.com/sanic-org/sanic/pull/1951>`_
@@ -445,8 +442,7 @@ Improved Documentation
 Version 20.9.1
 ---------------
 
-Bugfixes
-********
+**Bugfixes**
 
   *
     `#1954 <https://github.com/sanic-org/sanic/pull/1954>`_
@@ -459,8 +455,7 @@ Bugfixes
 Version 19.12.3
 ---------------
 
-Bugfixes
-********
+**Bugfixes**
 
   *
     `#1959 <https://github.com/sanic-org/sanic/pull/1959>`_
@@ -471,8 +466,7 @@ Version 20.9.0
 ---------------
 
 
-Features
-********
+**Features**
 
   *
     `#1887 <https://github.com/sanic-org/sanic/pull/1887>`_
@@ -499,22 +493,19 @@ Features
     `#1937 <https://github.com/sanic-org/sanic/pull/1937>`_
     Added auto, text, and json fallback error handlers (in v21.3, the default will change form html to auto)
 
-Bugfixes
-********
+**Bugfixes**
 
   *
     `#1897 <https://github.com/sanic-org/sanic/pull/1897>`_
     Resolves exception from unread bytes in stream
 
-Deprecations and Removals
-*************************
+**Deprecations and Removals**
 
   *
     `#1903 <https://github.com/sanic-org/sanic/pull/1903>`_
     config.from_envar, config.from_pyfile, and config.from_object are deprecated and set to be removed in v21.3
 
-Developer infrastructure
-************************
+**Developer infrastructure**
 
   *
     `#1890 <https://github.com/sanic-org/sanic/pull/1890>`_,
@@ -529,8 +520,7 @@ Developer infrastructure
     `#1924 <https://github.com/sanic-org/sanic/pull/1924>`_
     Adding --strict-markers for pytest
 
-Improved Documentation
-**********************
+**Improved Documentation**
 
   *
     `#1922 <https://github.com/sanic-org/sanic/pull/1922>`_
@@ -540,8 +530,7 @@ Improved Documentation
 Version 20.6.3
 ---------------
 
-Bugfixes
-********
+**Bugfixes**
 
   *
     `#1884 <https://github.com/sanic-org/sanic/pull/1884>`_
@@ -551,8 +540,7 @@ Bugfixes
 Version 20.6.2
 ---------------
 
-Features
-********
+**Features**
 
   *
     `#1641 <https://github.com/sanic-org/sanic/pull/1641>`_
@@ -562,8 +550,7 @@ Features
 Version 20.6.1
 ---------------
 
-Features
-********
+**Features**
 
   *
     `#1760 <https://github.com/sanic-org/sanic/pull/1760>`_
@@ -577,8 +564,7 @@ Features
     `#1880 <https://github.com/sanic-org/sanic/pull/1880>`_
     Add handler names for websockets for url_for usage
 
-Bugfixes
-********
+**Bugfixes**
 
   *
     `#1776 <https://github.com/sanic-org/sanic/pull/1776>`_
@@ -600,15 +586,13 @@ Bugfixes
     `#1853 <https://github.com/sanic-org/sanic/pull/1853>`_
     Fix pickle error when attempting to pickle an application which contains websocket routes
 
-Deprecations and Removals
-*************************
+**Deprecations and Removals**
 
   *
     `#1739 <https://github.com/sanic-org/sanic/pull/1739>`_
     Deprecate body_bytes to merge into body
 
-Developer infrastructure
-************************
+**Developer infrastructure**
 
   *
     `#1852 <https://github.com/sanic-org/sanic/pull/1852>`_
@@ -623,8 +607,7 @@ Developer infrastructure
     Wrap run()'s "protocol" type annotation in Optional[]
 
 
-Improved Documentation
-**********************
+**Improved Documentation**
 
   *
     `#1846 <https://github.com/sanic-org/sanic/pull/1846>`_
@@ -638,14 +621,13 @@ Improved Documentation
 Version 20.6.0
 ---------------
 
-*Released, but unintentionally ommitting PR #1880, so was replaced by 20.6.1*
+*Released, but unintentionally omitting PR #1880, so was replaced by 20.6.1*
 
 
 Version 20.3.0
 ---------------
 
-Features
-********
+**Features**
 
   *
     `#1762 <https://github.com/sanic-org/sanic/pull/1762>`_
@@ -676,8 +658,7 @@ Features
     `#1820 <https://github.com/sanic-org/sanic/pull/1820>`_
     Do not set content-type and content-length headers in exceptions
 
-Bugfixes
-********
+**Bugfixes**
 
   *
     `#1748 <https://github.com/sanic-org/sanic/pull/1748>`_
@@ -695,8 +676,7 @@ Bugfixes
     `#1808 <https://github.com/sanic-org/sanic/pull/1808>`_
      Fix Ctrl+C and tests on Windows
 
-Deprecations and Removals
-*************************
+**Deprecations and Removals**
 
   *
     `#1800 <https://github.com/sanic-org/sanic/pull/1800>`_
@@ -714,8 +694,7 @@ Deprecations and Removals
     `#1818 <https://github.com/sanic-org/sanic/pull/1818>`_
     Complete deprecation of ``app.remove_route`` and ``request.raw_args``
 
-Dependencies
-************
+**Dependencies**
 
   *
     `#1794 <https://github.com/sanic-org/sanic/pull/1794>`_
@@ -725,15 +704,13 @@ Dependencies
     `#1806 <https://github.com/sanic-org/sanic/pull/1806>`_
     Import ``ASGIDispatch`` from top-level ``httpx`` (from third-party deprecation)
 
-Developer infrastructure
-************************
+**Developer infrastructure**
 
   *
     `#1833 <https://github.com/sanic-org/sanic/pull/1833>`_
     Resolve broken documentation builds
 
-Improved Documentation
-**********************
+**Improved Documentation**
 
   *
     `#1755 <https://github.com/sanic-org/sanic/pull/1755>`_
@@ -775,8 +752,7 @@ Improved Documentation
 Version 19.12.0
 ---------------
 
-Bugfixes
-********
+**Bugfixes**
 
 - Fix blueprint middleware application
 
@@ -795,8 +771,7 @@ Bugfixes
   due to an `AttributeError`. This fix makes the availability of `SERVER_NAME` on our `app.config` an optional behavior. (`#1707 <https://github.com/sanic-org/sanic/issues/1707>`__)
 
 
-Improved Documentation
-**********************
+**Improved Documentation**
 
 - Move docs from MD to RST
 
@@ -810,8 +785,7 @@ Improved Documentation
 Version 19.6.3
 --------------
 
-Features
-********
+**Features**
 
 - Enable Towncrier Support
 
@@ -819,8 +793,7 @@ Features
   of generating and managing change logs as part of each of pull requests. (`#1631 <https://github.com/sanic-org/sanic/issues/1631>`__)
 
 
-Improved Documentation
-**********************
+**Improved Documentation**
 
 - Documentation infrastructure changes
 
@@ -833,8 +806,7 @@ Improved Documentation
 Version 19.6.2
 --------------
 
-Features
-********
+**Features**
 
   *
     `#1562 <https://github.com/sanic-org/sanic/pull/1562>`_
@@ -850,8 +822,7 @@ Features
     Add Configure support from object string
 
 
-Bugfixes
-********
+**Bugfixes**
 
   *
     `#1587 <https://github.com/sanic-org/sanic/pull/1587>`_
@@ -869,8 +840,7 @@ Bugfixes
     `#1594 <https://github.com/sanic-org/sanic/pull/1594>`_
     Strict Slashes behavior fix
 
-Deprecations and Removals
-*************************
+**Deprecations and Removals**
 
   *
     `#1544 <https://github.com/sanic-org/sanic/pull/1544>`_
@@ -894,8 +864,7 @@ Deprecations and Removals
 Version 19.3
 ------------
 
-Features
-********
+**Features**
 
   *
     `#1497 <https://github.com/sanic-org/sanic/pull/1497>`_
@@ -963,8 +932,7 @@ Features
 
     This is a breaking change.
 
-Bugfixes
-********
+**Bugfixes**
 
 
   *
@@ -1000,8 +968,7 @@ Bugfixes
     This allows the access log to be disabled for example when running via
     gunicorn.
 
-Developer infrastructure
-************************
+**Developer infrastructure**
 
   * `#1529 <https://github.com/sanic-org/sanic/pull/1529>`_ Update project PyPI credentials
   * `#1515 <https://github.com/sanic-org/sanic/pull/1515>`_ fix linter issue causing travis build failures (fix #1514)
@@ -1009,8 +976,7 @@ Developer infrastructure
   * `#1478 <https://github.com/sanic-org/sanic/pull/1478>`_ Upgrade setuptools version and use native docutils in doc build
   * `#1464 <https://github.com/sanic-org/sanic/pull/1464>`_ Upgrade pytest, and fix caplog unit tests
 
-Improved Documentation
-**********************
+**Improved Documentation**
 
   * `#1516 <https://github.com/sanic-org/sanic/pull/1516>`_ Fix typo at the exception documentation
   * `#1510 <https://github.com/sanic-org/sanic/pull/1510>`_ fix typo in Asyncio example
@@ -1071,21 +1037,19 @@ Version 18.12
   * Fix Range header handling for static files (#1402)
   * Fix the logger and make it work (#1397)
   * Fix type pikcle->pickle in multiprocessing test
-  * Fix pickling blueprints Change the string passed in the "name" section of the namedtuples in Blueprint to match the name of the Blueprint module attribute name. This allows blueprints to be pickled and unpickled, without errors, which is a requirment of running Sanic in multiprocessing mode in Windows. Added a test for pickling and unpickling blueprints Added a test for pickling and unpickling sanic itself Added a test for enabling multiprocessing on an app with a blueprint (only useful to catch this bug if the tests are run on Windows).
+  * Fix pickling blueprints Change the string passed in the "name" section of the namedtuples in Blueprint to match the name of the Blueprint module attribute name. This allows blueprints to be pickled and unpickled, without errors, which is a requirement of running Sanic in multiprocessing mode in Windows. Added a test for pickling and unpickling blueprints Added a test for pickling and unpickling sanic itself Added a test for enabling multiprocessing on an app with a blueprint (only useful to catch this bug if the tests are run on Windows).
   * Fix document for logging
 
 Version 0.8
 -----------
 
-0.8.3
-*****
+**0.8.3**
 
 * Changes:
 
   * Ownership changed to org 'sanic-org'
 
-0.8.0
-*****
+**0.8.0**
 
 * Changes:
 
@@ -1110,7 +1074,7 @@ Version 0.8
   * Content-length header on 204/304 responses (Arnulfo Solís)
   * Extend WebSocketProtocol arguments and add docs (Bob Olde Hampsink, yunstanford)
   * Update development status from pre-alpha to beta (Maksim Anisenkov)
-  * KeepAlive Timout log level changed to debug (Arnulfo Solís)
+  * KeepAlive Timeout log level changed to debug (Arnulfo Solís)
   * Pin pytest to 3.3.2 because of pytest-dev/pytest#3170 (Maksim Aniskenov)
   * Install Python 3.5 and 3.6 on docker container for tests (Shahin Azad)
   * Add support for blueprint groups and nesting (Elias Tarhini)
@@ -1165,19 +1129,16 @@ Version 0.1
 -----------
 
 
-0.1.7
-*****
+**0.1.7**
 
   * Reversed static url and directory arguments to meet spec
 
-0.1.6
-*****
+**0.1.6**
 
   * Static files
   * Lazy Cookie Loading
 
-0.1.5
-*****
+**0.1.5**
 
   * Cookies
   * Blueprint listeners and ordering
@@ -1185,23 +1146,19 @@ Version 0.1
   * Fix: Incomplete file reads on medium+ sized post requests
   * Breaking: after_start and before_stop now pass sanic as their first argument
 
-0.1.4
-*****
+**0.1.4**
 
   * Multiprocessing
 
-0.1.3
-*****
+**0.1.3**
 
   * Blueprint support
   * Faster Response processing
 
-0.1.1 - 0.1.2
-*************
+**0.1.1 - 0.1.2**
 
   * Struggling to update pypi via CI
 
-0.1.0
-*****
+**0.1.0**
 
   * Released to public

CONTRIBUTING.rst

@@ -19,7 +19,7 @@ a virtual environment already set up, then run:
 
 .. code-block:: bash
 
-   pip3 install -e . ".[dev]"
+   pip install -e ".[dev]"
 
 Dependency Changes
 ------------------

README.rst

@@ -11,7 +11,7 @@ Sanic | Build fast. Run fast.
     :stub-columns: 1
 
     * - Build
-      - | |Py39Test| |Py38Test| |Py37Test| |Codecov|
+      - | |Py310Test| |Py39Test| |Py38Test| |Py37Test|
     * - Docs
       - | |UserGuide| |Documentation|
     * - Package
@@ -27,8 +27,8 @@ Sanic | Build fast. Run fast.
    :target: https://community.sanicframework.org/
 .. |Discord| image:: https://img.shields.io/discord/812221182594121728?logo=discord
    :target: https://discord.gg/FARQzAEMAA
-.. |Codecov| image:: https://codecov.io/gh/sanic-org/sanic/branch/master/graph/badge.svg
-    :target: https://codecov.io/gh/sanic-org/sanic
+.. |Py310Test| image:: https://github.com/sanic-org/sanic/actions/workflows/pr-python310.yml/badge.svg?branch=main
+   :target: https://github.com/sanic-org/sanic/actions/workflows/pr-python310.yml
 .. |Py39Test| image:: https://github.com/sanic-org/sanic/actions/workflows/pr-python39.yml/badge.svg?branch=main
    :target: https://github.com/sanic-org/sanic/actions/workflows/pr-python39.yml
 .. |Py38Test| image:: https://github.com/sanic-org/sanic/actions/workflows/pr-python38.yml/badge.svg?branch=main
@@ -77,17 +77,11 @@ The goal of the project is to provide a simple way to get up and running a highl
 Sponsor
 -------
 
-|Try CodeStream|
+Check out `open collective <https://opencollective.com/sanic-org>`_ to learn more about helping to fund Sanic. 
 
-.. |Try CodeStream| image:: https://alt-images.codestream.com/codestream_logo_sanicorg.png
-   :target: https://codestream.com/?utm_source=github&amp;utm_campaign=sanicorg&amp;utm_medium=banner
-   :alt: Try CodeStream
+Thanks to `Linode <https://www.linode.com>`_ for their contribution towards the development and community of Sanic.
 
-Manage pull requests and conduct code reviews in your IDE with full source-tree context. Comment on any line, not just the diffs. Use jump-to-definition, your favorite keybindings, and code intelligence with more of your workflow.
-
-`Learn More <https://codestream.com/?utm_source=github&amp;utm_campaign=sanicorg&amp;utm_medium=banner>`_
-
-Thank you to our sponsor. Check out `open collective <https://opencollective.com/sanic-org>`_ to learn more about helping to fund Sanic.
+|Linode|
 
 Installation
 ------------
@@ -172,3 +166,8 @@ Contribution
 ------------
 
 We are always happy to have new contributions. We have `marked issues good for anyone looking to get started <https://github.com/sanic-org/sanic/issues?q=is%3Aopen+is%3Aissue+label%3Abeginner>`_, and welcome `questions on the forums <https://community.sanicframework.org/>`_. Please take a look at our `Contribution guidelines <https://github.com/sanic-org/sanic/blob/master/CONTRIBUTING.rst>`_.
+
+.. |Linode| image:: https://www.linode.com/wp-content/uploads/2021/01/Linode-Logo-Black.svg
+    :alt: Linode
+    :target: https://www.linode.com
+    :width: 200px

docs/conf.py

@@ -10,10 +10,8 @@
 import os
 import sys
 
-# Add support for auto-doc
-import recommonmark
 
-from recommonmark.transform import AutoStructify
+# Add support for auto-doc
 
 
 # Ensure that sanic is present in the path, to allow sphinx-apidoc to
@@ -26,7 +24,7 @@ import sanic
 
 # -- General configuration ------------------------------------------------
 
-extensions = ["sphinx.ext.autodoc", "recommonmark"]
+extensions = ["sphinx.ext.autodoc", "m2r2"]
 
 templates_path = ["_templates"]
 
@@ -162,20 +160,6 @@ autodoc_default_options = {
     "member-order": "groupwise",
 }
 
-
-# app setup hook
-def setup(app):
-    app.add_config_value(
-        "recommonmark_config",
-        {
-            "enable_eval_rst": True,
-            "enable_auto_doc_ref": False,
-        },
-        True,
-    )
-    app.add_transform(AutoStructify)
-
-
 html_theme_options = {
     "style_external_links": False,
 }

docs/sanic/api/core.rst

@@ -38,10 +38,3 @@ sanic.views
 .. automodule:: sanic.views
     :members:
     :show-inheritance:
-
-sanic.websocket
----------------
-
-.. automodule:: sanic.websocket
-    :members:
-    :show-inheritance:

docs/sanic/changelog.rst

@@ -1,4 +1,6 @@
 📜 Changelog
 ============
 
+.. mdinclude:: ./releases/21/21.12.md
+.. mdinclude:: ./releases/21/21.9.md
 .. include:: ../../CHANGELOG.rst

docs/sanic/contributing.rst

@@ -1,4 +1,4 @@
 ♥️ Contributing
-==============
+===============
 
 .. include:: ../../CONTRIBUTING.rst

docs/sanic/releases/21/21.12.md

@@ -0,0 +1,64 @@
+## Version 21.12.1
+
+- [#2349](https://github.com/sanic-org/sanic/pull/2349) Only display MOTD on startup
+- [#2354](https://github.com/sanic-org/sanic/pull/2354) Ignore name argument in Python 3.7
+- [#2355](https://github.com/sanic-org/sanic/pull/2355) Add config.update support for all config values
+
+## Version 21.12.0
+
+### Features
+- [#2260](https://github.com/sanic-org/sanic/pull/2260) Allow early Blueprint registrations to still apply later added objects
+- [#2262](https://github.com/sanic-org/sanic/pull/2262) Noisy exceptions - force logging of all exceptions
+- [#2264](https://github.com/sanic-org/sanic/pull/2264) Optional `uvloop` by configuration
+- [#2270](https://github.com/sanic-org/sanic/pull/2270) Vhost support using multiple TLS certificates
+- [#2277](https://github.com/sanic-org/sanic/pull/2277) Change signal routing for increased consistency
+    - *BREAKING CHANGE*: If you were manually routing signals there is a breaking change. The signal router's `get` is no longer 100% determinative. There is now an additional step to loop thru the returned signals for proper matching on the requirements. If signals are being dispatched using `app.dispatch` or `bp.dispatch`, there is no change.
+- [#2290](https://github.com/sanic-org/sanic/pull/2290) Add contextual exceptions
+- [#2291](https://github.com/sanic-org/sanic/pull/2291) Increase join concat performance 
+- [#2295](https://github.com/sanic-org/sanic/pull/2295), [#2316](https://github.com/sanic-org/sanic/pull/2316), [#2331](https://github.com/sanic-org/sanic/pull/2331) Restructure of CLI and application state with new displays and more command parity with `app.run`
+- [#2302](https://github.com/sanic-org/sanic/pull/2302) Add route context at definition time
+- [#2304](https://github.com/sanic-org/sanic/pull/2304) Named tasks and new API for managing background tasks
+- [#2307](https://github.com/sanic-org/sanic/pull/2307) On app auto-reload, provide insight of changed files
+- [#2308](https://github.com/sanic-org/sanic/pull/2308) Auto extend application with [Sanic Extensions](https://sanicframework.org/en/plugins/sanic-ext/getting-started.html) if it is installed, and provide first class support for accessing the extensions
+- [#2309](https://github.com/sanic-org/sanic/pull/2309) Builtin signals changed to `Enum`
+- [#2313](https://github.com/sanic-org/sanic/pull/2313) Support additional config implementation use case
+- [#2321](https://github.com/sanic-org/sanic/pull/2321) Refactor environment variable hydration logic
+- [#2327](https://github.com/sanic-org/sanic/pull/2327) Prevent sending multiple or mixed responses on a single request
+- [#2330](https://github.com/sanic-org/sanic/pull/2330) Custom type casting on environment variables
+- [#2332](https://github.com/sanic-org/sanic/pull/2332) Make all deprecation notices consistent
+- [#2335](https://github.com/sanic-org/sanic/pull/2335) Allow underscore to start instance names
+
+### Bugfixes
+- [#2273](https://github.com/sanic-org/sanic/pull/2273) Replace assignation by typing for `websocket_handshake`
+- [#2285](https://github.com/sanic-org/sanic/pull/2285) Fix IPv6 display in startup logs
+- [#2299](https://github.com/sanic-org/sanic/pull/2299) Dispatch `http.lifecyle.response` from exception handler
+
+### Deprecations and Removals
+- [#2306](https://github.com/sanic-org/sanic/pull/2306) Removal of deprecated items
+    - `Sanic` and `Blueprint` may no longer have arbitrary properties attached to them
+    - `Sanic` and `Blueprint` forced to have compliant names
+        - alphanumeric + `_` + `-`
+        - must start with letter or `_`
+    - `load_env` keyword argument of `Sanic`
+    - `sanic.exceptions.abort`
+    - `sanic.views.CompositionView`
+    - `sanic.response.StreamingHTTPResponse`
+        - *NOTE:* the `stream()` response method (where you pass a callable streaming function) has been deprecated and will be removed in v22.6. You should upgrade all streaming responses to the new style: https://sanicframework.org/en/guide/advanced/streaming.html#response-streaming
+- [#2320](https://github.com/sanic-org/sanic/pull/2320) Remove app instance from Config for error handler setting
+
+### Developer infrastructure
+- [#2251](https://github.com/sanic-org/sanic/pull/2251) Change dev install command
+- [#2286](https://github.com/sanic-org/sanic/pull/2286) Change codeclimate complexity threshold from 5 to 10
+- [#2287](https://github.com/sanic-org/sanic/pull/2287) Update host test function names so they are not overwritten
+- [#2292](https://github.com/sanic-org/sanic/pull/2292) Fail CI on error
+- [#2311](https://github.com/sanic-org/sanic/pull/2311), [#2324](https://github.com/sanic-org/sanic/pull/2324) Do not run tests for draft PRs
+- [#2336](https://github.com/sanic-org/sanic/pull/2336) Remove paths from coverage checks
+- [#2338](https://github.com/sanic-org/sanic/pull/2338) Cleanup ports on tests
+
+### Improved Documentation
+- [#2269](https://github.com/sanic-org/sanic/pull/2269), [#2329](https://github.com/sanic-org/sanic/pull/2329), [#2333](https://github.com/sanic-org/sanic/pull/2333) Cleanup typos and fix language
+
+### Miscellaneous
+- [#2257](https://github.com/sanic-org/sanic/pull/2257), [#2294](https://github.com/sanic-org/sanic/pull/2294), [#2341](https://github.com/sanic-org/sanic/pull/2341) Add Python 3.10 support
+- [#2279](https://github.com/sanic-org/sanic/pull/2279), [#2317](https://github.com/sanic-org/sanic/pull/2317), [#2322](https://github.com/sanic-org/sanic/pull/2322) Add/correct missing type annotations
+- [#2305](https://github.com/sanic-org/sanic/pull/2305) Fix examples to use modern implementations

docs/sanic/releases/21/21.9.md

@@ -0,0 +1,50 @@
+## Version 21.9.3
+*Rerelease of v21.9.2 with some cleanup*
+
+## Version 21.9.2
+- [#2268](https://github.com/sanic-org/sanic/pull/2268) Make HTTP connections start in IDLE stage, avoiding delays and error messages
+- [#2310](https://github.com/sanic-org/sanic/pull/2310) More consistent config setting with post-FALLBACK_ERROR_FORMAT apply
+
+## Version 21.9.1
+- [#2259](https://github.com/sanic-org/sanic/pull/2259) Allow non-conforming ErrorHandlers
+
+## Version 21.9.0
+
+### Features
+- [#2158](https://github.com/sanic-org/sanic/pull/2158), [#2248](https://github.com/sanic-org/sanic/pull/2248) Complete overhaul of I/O to websockets
+- [#2160](https://github.com/sanic-org/sanic/pull/2160) Add new 17 signals into server and request lifecycles
+- [#2162](https://github.com/sanic-org/sanic/pull/2162) Smarter `auto` fallback formatting upon exception
+- [#2184](https://github.com/sanic-org/sanic/pull/2184) Introduce implementation for copying a Blueprint
+- [#2200](https://github.com/sanic-org/sanic/pull/2200) Accept header parsing
+- [#2207](https://github.com/sanic-org/sanic/pull/2207) Log remote address if available
+- [#2209](https://github.com/sanic-org/sanic/pull/2209) Add convenience methods to BP groups
+- [#2216](https://github.com/sanic-org/sanic/pull/2216) Add default messages to SanicExceptions
+- [#2225](https://github.com/sanic-org/sanic/pull/2225) Type annotation convenience for annotated handlers with path parameters
+- [#2236](https://github.com/sanic-org/sanic/pull/2236) Allow Falsey (but not-None) responses from route handlers
+- [#2238](https://github.com/sanic-org/sanic/pull/2238) Add `exception` decorator to Blueprint Groups
+- [#2244](https://github.com/sanic-org/sanic/pull/2244) Explicit static directive for serving file or dir (ex: `static(..., resource_type="file")`)
+- [#2245](https://github.com/sanic-org/sanic/pull/2245) Close HTTP loop when connection task cancelled
+
+### Bugfixes
+- [#2188](https://github.com/sanic-org/sanic/pull/2188) Fix the handling of the end of a chunked request
+- [#2195](https://github.com/sanic-org/sanic/pull/2195) Resolve unexpected error handling on static requests
+- [#2208](https://github.com/sanic-org/sanic/pull/2208) Make blueprint-based exceptions attach and trigger in a more intuitive manner
+- [#2211](https://github.com/sanic-org/sanic/pull/2211) Fixed for handling exceptions of asgi app call
+- [#2213](https://github.com/sanic-org/sanic/pull/2213) Fix bug where ws exceptions not being logged
+- [#2231](https://github.com/sanic-org/sanic/pull/2231) Cleaner closing of tasks by using `abort()` in strategic places to avoid dangling sockets
+- [#2247](https://github.com/sanic-org/sanic/pull/2247) Fix logging of auto-reload status in debug mode
+- [#2246](https://github.com/sanic-org/sanic/pull/2246) Account for BP with exception handler but no routes
+
+### Developer infrastructure  
+- [#2194](https://github.com/sanic-org/sanic/pull/2194) HTTP unit tests with raw client
+- [#2199](https://github.com/sanic-org/sanic/pull/2199) Switch to codeclimate
+- [#2214](https://github.com/sanic-org/sanic/pull/2214) Try Reopening Windows Tests
+- [#2229](https://github.com/sanic-org/sanic/pull/2229) Refactor `HttpProtocol` into a base class
+- [#2230](https://github.com/sanic-org/sanic/pull/2230) Refactor `server.py` into multi-file module
+
+### Miscellaneous
+- [#2173](https://github.com/sanic-org/sanic/pull/2173) Remove Duplicated Dependencies and PEP 517 Support 
+- [#2193](https://github.com/sanic-org/sanic/pull/2193), [#2196](https://github.com/sanic-org/sanic/pull/2196), [#2217](https://github.com/sanic-org/sanic/pull/2217) Type annotation changes
+
+
+

examples/add_task_sanic.py

@@ -4,12 +4,14 @@ import asyncio
 
 from sanic import Sanic
 
-app = Sanic()
+
+app = Sanic("Example")
 
 
 async def notify_server_started_after_five_seconds():
     await asyncio.sleep(5)
-    print('Server successfully started!')
+    print("Server successfully started!")
+
 
 app.add_task(notify_server_started_after_five_seconds())
 

examples/amending_request_object.py

@@ -1,30 +1,29 @@
-from sanic import Sanic
-from sanic.response import text
 from random import randint
 
-app = Sanic()
+from sanic import Sanic
+from sanic.response import text
 
 
-@app.middleware('request')
+app = Sanic("Example")
+
+
+@app.middleware("request")
 def append_request(request):
-    # Add new key with random value
-    request['num'] = randint(0, 100)
+    request.ctx.num = randint(0, 100)
 
 
-@app.get('/pop')
+@app.get("/pop")
 def pop_handler(request):
-    # Pop key from request object
-    num = request.pop('num')
-    return text(num)
+    return text(request.ctx.num)
 
 
-@app.get('/key_exist')
+@app.get("/key_exist")
 def key_exist_handler(request):
     # Check the key is exist or not
-    if 'num' in request:
-        return text('num exist in request')
+    if hasattr(request.ctx, "num"):
+        return text("num exist in request")
 
-    return text('num does not exist in reqeust')
+    return text("num does not exist in request")
 
 
 app.run(host="0.0.0.0", port=8000, debug=True)

examples/authorized_sanic.py

@@ -1,10 +1,12 @@
 # -*- coding: utf-8 -*-
 
-from sanic import Sanic
 from functools import wraps
+
+from sanic import Sanic
 from sanic.response import json
 
-app = Sanic()
+
+app = Sanic("Example")
 
 
 def check_request_for_authorization_status(request):
@@ -27,14 +29,16 @@ def authorized(f):
             return response
         else:
             # the user is not authorized.
-            return json({'status': 'not_authorized'}, 403)
+            return json({"status": "not_authorized"}, 403)
+
     return decorated_function
 
 
 @app.route("/")
 @authorized
 async def test(request):
-    return json({'status': 'authorized'})
+    return json({"status": "authorized"})
+
 
 if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000)

examples/blueprint_middlware_execution_order.py

@@ -1,43 +1,53 @@
-from sanic import Sanic, Blueprint
+from sanic import Blueprint, Sanic
 from sanic.response import text
-'''
-Demonstrates that blueprint request middleware are executed in the order they 
+
+
+"""
+Demonstrates that blueprint request middleware are executed in the order they
 are added. And blueprint response middleware are executed in _reverse_ order.
 On a valid request, it should print "1 2 3 6 5 4" to terminal
-'''
+"""
 
-app = Sanic(__name__)
+app = Sanic("Example")
 
-bp = Blueprint("bp_"+__name__)
+bp = Blueprint("bp_example")
 
-@bp.middleware('request')
+
+@bp.on_request
 def request_middleware_1(request):
-    print('1')
+    print("1")
 
-@bp.middleware('request')
+
+@bp.on_request
 def request_middleware_2(request):
-    print('2')
+    print("2")
 
-@bp.middleware('request')
+
+@bp.on_request
 def request_middleware_3(request):
-    print('3')
+    print("3")
 
-@bp.middleware('response')
+
+@bp.on_response
 def resp_middleware_4(request, response):
-    print('4')
+    print("4")
 
-@bp.middleware('response')
+
+@bp.on_response
 def resp_middleware_5(request, response):
-    print('5')
+    print("5")
 
-@bp.middleware('response')
+
+@bp.on_response
 def resp_middleware_6(request, response):
-    print('6')
+    print("6")
 
-@bp.route('/')
+
+@bp.route("/")
 def pop_handler(request):
-    return text('hello world')
+    return text("hello world")
 
-app.blueprint(bp, url_prefix='/bp')
+
+app.blueprint(bp, url_prefix="/bp")
 
 app.run(host="0.0.0.0", port=8000, debug=True, auto_reload=False)

examples/blueprints.py

@@ -1,10 +1,11 @@
 from sanic import Blueprint, Sanic
 from sanic.response import file, json
 
-app = Sanic(__name__)
-blueprint = Blueprint("name", url_prefix="/my_blueprint")
-blueprint2 = Blueprint("name2", url_prefix="/my_blueprint2")
-blueprint3 = Blueprint("name3", url_prefix="/my_blueprint3")
+
+app = Sanic("Example")
+blueprint = Blueprint("bp_example", url_prefix="/my_blueprint")
+blueprint2 = Blueprint("bp_example2", url_prefix="/my_blueprint2")
+blueprint3 = Blueprint("bp_example3", url_prefix="/my_blueprint3")
 
 
 @blueprint.route("/foo")

examples/delayed_response.py

@@ -2,17 +2,20 @@ from asyncio import sleep
 
 from sanic import Sanic, response
 
-app = Sanic(__name__, strict_slashes=True)
+
+app = Sanic("DelayedResponseApp", strict_slashes=True)
+
 
 @app.get("/")
 async def handler(request):
     return response.redirect("/sleep/3")
 
+
 @app.get("/sleep/<t:number>")
 async def handler2(request, t=0.3):
     await sleep(t)
     return response.text(f"Slept {t:.1f} seconds.\n")
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000)

examples/exception_monitoring.py

@@ -7,8 +7,10 @@ and pass in an instance of it when we create our Sanic instance. Inside this
 class' default handler, we can do anything including sending exceptions to
 an external service.
 """
-from sanic.handlers import ErrorHandler
 from sanic.exceptions import SanicException
+from sanic.handlers import ErrorHandler
+
+
 """
 Imports and code relevant for our CustomHandler class
 (Ordinarily this would be in a separate file)
@@ -16,7 +18,6 @@ Imports and code relevant for our CustomHandler class
 
 
 class CustomHandler(ErrorHandler):
-
     def default(self, request, exception):
         # Here, we have access to the exception object
         # and can do anything with it (log, send to external service, etc)
@@ -38,17 +39,17 @@ server's error_handler to an instance of our CustomHandler
 
 from sanic import Sanic
 
-app = Sanic(__name__)
 
 handler = CustomHandler()
-app.error_handler = handler
+app = Sanic("Example", error_handler=handler)
 
 
 @app.route("/")
 async def test(request):
     # Here, something occurs which causes an unexpected exception
     # This exception will flow to our custom handler.
-    raise SanicException('You Broke It!')
+    raise SanicException("You Broke It!")
 
-if __name__ == '__main__':
+
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000, debug=True)

examples/hello_world.py

@@ -1,7 +1,7 @@
-from sanic import Sanic
-from sanic import response
+from sanic import Sanic, response
 
-app = Sanic(__name__)
+
+app = Sanic("Example")
 
 
 @app.route("/")
@@ -9,5 +9,5 @@ async def test(request):
     return response.json({"test": True})
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000)

examples/http_redirect.py

@@ -1,4 +1,6 @@
 from sanic import Sanic, response, text
+from sanic.handlers import ErrorHandler
+from sanic.server.async_server import AsyncioServer
 
 
 HTTP_PORT = 9999
@@ -32,20 +34,40 @@ def proxy(request, path):
     return response.redirect(url)
 
 
-@https.listener("main_process_start")
+@https.main_process_start
 async def start(app, _):
-    global http
-    app.http_server = await http.create_server(
+    http_server = await http.create_server(
         port=HTTP_PORT, return_asyncio_server=True
     )
-    app.http_server.after_start()
+    app.add_task(runner(http, http_server))
+    app.ctx.http_server = http_server
+    app.ctx.http = http
 
 
-@https.listener("main_process_stop")
+@https.main_process_stop
 async def stop(app, _):
-    app.http_server.before_stop()
-    await app.http_server.close()
-    app.http_server.after_stop()
+    await app.ctx.http_server.before_stop()
+    await app.ctx.http_server.close()
+    for connection in app.ctx.http_server.connections:
+        connection.close_if_idle()
+    await app.ctx.http_server.after_stop()
+    app.ctx.http = False
+
+
+async def runner(app: Sanic, app_server: AsyncioServer):
+    app.is_running = True
+    try:
+        app.signalize()
+        app.finalize()
+        ErrorHandler.finalize(app.error_handler)
+        app_server.init = True
+
+        await app_server.before_start()
+        await app_server.after_start()
+        await app_server.serve_forever()
+    finally:
+        app.is_running = False
+        app.is_stopping = True
 
 
 https.run(port=HTTPS_PORT, debug=True)

examples/limit_concurrency.py

@@ -1,26 +1,30 @@
+import asyncio
+
+import httpx
+
 from sanic import Sanic
 from sanic.response import json
 
-import asyncio
-import aiohttp
 
-app = Sanic(__name__)
+app = Sanic("Example")
 
 sem = None
 
 
-@app.listener('before_server_start')
-def init(sanic, loop):
+@app.before_server_start
+def init(sanic, _):
     global sem
     concurrency_per_worker = 4
-    sem = asyncio.Semaphore(concurrency_per_worker, loop=loop)
+    sem = asyncio.Semaphore(concurrency_per_worker)
+
 
 async def bounded_fetch(session, url):
     """
     Use session object to perform 'get' request on url
     """
-    async with sem, session.get(url) as response:
-        return await response.json()
+    async with sem:
+        response = await session.get(url)
+        return response.json()
 
 
 @app.route("/")
@@ -28,9 +32,9 @@ async def test(request):
     """
     Download and serve example JSON
     """
-    url = "https://api.github.com/repos/channelcat/sanic"
+    url = "https://api.github.com/repos/sanic-org/sanic"
 
-    async with aiohttp.ClientSession() as session:
+    async with httpx.AsyncClient() as session:
         response = await bounded_fetch(session, url)
         return json(response)
 

examples/log_request_id.py

@@ -1,6 +1,6 @@
 import logging
 
-import aiotask_context as context
+from contextvars import ContextVar
 
 from sanic import Sanic, response
 
@@ -11,8 +11,8 @@ log = logging.getLogger(__name__)
 class RequestIdFilter(logging.Filter):
     def filter(self, record):
         try:
-            record.request_id = context.get("X-Request-ID")
-        except ValueError:
+            record.request_id = app.ctx.request_id.get(None) or "n/a"
+        except AttributeError:
             record.request_id = "n/a"
         return True
 
@@ -44,13 +44,12 @@ LOG_SETTINGS = {
 }
 
 
-app = Sanic(__name__, log_config=LOG_SETTINGS)
+app = Sanic("Example", log_config=LOG_SETTINGS)
 
 
 @app.on_request
 async def set_request_id(request):
-    request_id = request.id
-    context.set("X-Request-ID", request_id)
+    request.app.ctx.request_id.set(request.id)
     log.info(f"Setting {request.id=}")
 
 
@@ -61,14 +60,14 @@ async def set_request_header(request, response):
 
 @app.route("/")
 async def test(request):
-    log.debug("X-Request-ID: %s", context.get("X-Request-ID"))
+    log.debug("X-Request-ID: %s", request.id)
     log.info("Hello from test!")
     return response.json({"test": True})
 
 
 @app.before_server_start
 def setup(app, loop):
-    loop.set_task_factory(context.task_factory)
+    app.ctx.request_id = ContextVar("request_id")
 
 
 if __name__ == "__main__":

examples/logdna_example.py

@@ -1,5 +1,6 @@
 import logging
 import socket
+
 from os import getenv
 from platform import node
 from uuid import getnode as get_mac
@@ -7,10 +8,11 @@ from uuid import getnode as get_mac
 from logdna import LogDNAHandler
 
 from sanic import Sanic
-from sanic.response import json
 from sanic.request import Request
+from sanic.response import json
 
-log = logging.getLogger('logdna')
+
+log = logging.getLogger("logdna")
 log.setLevel(logging.INFO)
 
 
@@ -30,16 +32,18 @@ logdna_options = {
     "index_meta": True,
     "hostname": node(),
     "ip": get_my_ip_address(),
-    "mac": get_mac_address()
+    "mac": get_mac_address(),
 }
 
-logdna_handler = LogDNAHandler(getenv("LOGDNA_API_KEY"), options=logdna_options)
+logdna_handler = LogDNAHandler(
+    getenv("LOGDNA_API_KEY"), options=logdna_options
+)
 
 logdna = logging.getLogger(__name__)
 logdna.setLevel(logging.INFO)
 logdna.addHandler(logdna_handler)
 
-app = Sanic(__name__)
+app = Sanic("Example")
 
 
 @app.middleware
@@ -49,13 +53,8 @@ def log_request(request: Request):
 
 @app.route("/")
 def default(request):
-    return json({
-        "response": "I was here"
-    })
+    return json({"response": "I was here"})
 
 
 if __name__ == "__main__":
-    app.run(
-        host="0.0.0.0",
-        port=getenv("PORT", 8080)
-    )
+    app.run(host="0.0.0.0", port=getenv("PORT", 8080))

examples/modify_header_example.py

@@ -2,27 +2,29 @@
 Modify header or status in response
 """
 
-from sanic import Sanic
-from sanic import response
-
-app = Sanic(__name__)
+from sanic import Sanic, response
 
 
-@app.route('/')
+app = Sanic("Example")
+
+
+@app.route("/")
 def handle_request(request):
     return response.json(
-        {'message': 'Hello world!'},
-        headers={'X-Served-By': 'sanic'},
-        status=200
+        {"message": "Hello world!"},
+        headers={"X-Served-By": "sanic"},
+        status=200,
     )
 
 
-@app.route('/unauthorized')
+@app.route("/unauthorized")
 def handle_request(request):
     return response.json(
-        {'message': 'You are not authorized'},
-        headers={'X-Served-By': 'sanic'},
-        status=404
+        {"message": "You are not authorized"},
+        headers={"X-Served-By": "sanic"},
+        status=404,
     )
 
-app.run(host="0.0.0.0", port=8000, debug=True)
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=8000, debug=True)

examples/pytest_xdist.py

@@ -32,7 +32,7 @@ def test_port(worker_id):
 
 @pytest.fixture(scope="session")
 def app():
-    app = Sanic()
+    app = Sanic("Example")
 
     @app.route("/")
     async def index(request):

examples/raygun_example.py

@@ -8,7 +8,6 @@ from sanic.handlers import ErrorHandler
 
 
 class RaygunExceptionReporter(ErrorHandler):
-
     def __init__(self, raygun_api_key=None):
         super().__init__()
         if raygun_api_key is None:
@@ -22,16 +21,13 @@ class RaygunExceptionReporter(ErrorHandler):
 
 
 raygun_error_reporter = RaygunExceptionReporter()
-app = Sanic(__name__, error_handler=raygun_error_reporter)
+app = Sanic("Example", error_handler=raygun_error_reporter)
 
 
 @app.route("/raise")
 async def test(request):
-    raise SanicException('You Broke It!')
+    raise SanicException("You Broke It!")
 
 
-if __name__ == '__main__':
-    app.run(
-        host="0.0.0.0",
-        port=getenv("PORT", 8080)
-    )
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=getenv("PORT", 8080))

examples/redirect_example.py

@@ -1,18 +1,18 @@
-from sanic import Sanic
-from sanic import response
+from sanic import Sanic, response
 
-app = Sanic(__name__)
 
-    
-@app.route('/')
+app = Sanic("Example")
+
+
+@app.route("/")
 def handle_request(request):
-    return response.redirect('/redirect')
+    return response.redirect("/redirect")
 
 
-@app.route('/redirect')
+@app.route("/redirect")
 async def test(request):
     return response.json({"Redirected": True})
 
 
-if __name__ == '__main__':
-    app.run(host="0.0.0.0", port=8000)
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=8000)

examples/request_stream/server.py

@@ -1,65 +1,63 @@
 from sanic import Sanic
-from sanic.views import CompositionView
-from sanic.views import HTTPMethodView
-from sanic.views import stream as stream_decorator
 from sanic.blueprints import Blueprint
 from sanic.response import stream, text
+from sanic.views import HTTPMethodView
+from sanic.views import stream as stream_decorator
 
-bp = Blueprint('blueprint_request_stream')
-app = Sanic('request_stream')
+
+bp = Blueprint("bp_example")
+app = Sanic("Example")
 
 
 class SimpleView(HTTPMethodView):
-
     @stream_decorator
     async def post(self, request):
-        result = ''
+        result = ""
         while True:
             body = await request.stream.get()
             if body is None:
                 break
-            result += body.decode('utf-8')
+            result += body.decode("utf-8")
         return text(result)
 
 
-@app.post('/stream', stream=True)
+@app.post("/stream", stream=True)
 async def handler(request):
     async def streaming(response):
         while True:
             body = await request.stream.get()
             if body is None:
                 break
-            body = body.decode('utf-8').replace('1', 'A')
+            body = body.decode("utf-8").replace("1", "A")
             await response.write(body)
+
     return stream(streaming)
 
 
-@bp.put('/bp_stream', stream=True)
+@bp.put("/bp_stream", stream=True)
 async def bp_handler(request):
-    result = ''
+    result = ""
     while True:
         body = await request.stream.get()
         if body is None:
             break
-        result += body.decode('utf-8').replace('1', 'A')
+        result += body.decode("utf-8").replace("1", "A")
     return text(result)
 
 
 async def post_handler(request):
-    result = ''
+    result = ""
     while True:
         body = await request.stream.get()
         if body is None:
             break
-        result += body.decode('utf-8')
+        result += body.decode("utf-8")
     return text(result)
 
+
 app.blueprint(bp)
-app.add_route(SimpleView.as_view(), '/method_view')
-view = CompositionView()
-view.add(['POST'], post_handler, stream=True)
-app.add_route(view, '/composition_view')
+app.add_route(SimpleView.as_view(), "/method_view")
 
 
-if __name__ == '__main__':
-    app.run(host='0.0.0.0', port=8000)
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=8000)

examples/request_timeout.py

@@ -1,21 +1,23 @@
 import asyncio
-from sanic import Sanic
-from sanic import response
+
+from sanic import Sanic, response
 from sanic.config import Config
 from sanic.exceptions import RequestTimeout
 
+
 Config.REQUEST_TIMEOUT = 1
-app = Sanic(__name__)
+app = Sanic("Example")
 
 
-@app.route('/')
+@app.route("/")
 async def test(request):
     await asyncio.sleep(3)
-    return response.text('Hello, world!')
+    return response.text("Hello, world!")
 
 
 @app.exception(RequestTimeout)
 def timeout(request, exception):
-    return response.text('RequestTimeout from error_handler.', 408)
+    return response.text("RequestTimeout from error_handler.", 408)
 
-app.run(host='0.0.0.0', port=8000)
+
+app.run(host="0.0.0.0", port=8000)

examples/rollbar_example.py

@@ -1,21 +1,22 @@
+from os import getenv
+
 import rollbar
 
-from sanic.handlers import ErrorHandler
 from sanic import Sanic
 from sanic.exceptions import SanicException
-from os import getenv
+from sanic.handlers import ErrorHandler
+
 
 rollbar.init(getenv("ROLLBAR_API_KEY"))
 
 
 class RollbarExceptionHandler(ErrorHandler):
-
     def default(self, request, exception):
         rollbar.report_message(str(exception))
         return super().default(request, exception)
 
 
-app = Sanic(__name__, error_handler=RollbarExceptionHandler())
+app = Sanic("Example", error_handler=RollbarExceptionHandler())
 
 
 @app.route("/raise")
@@ -24,7 +25,4 @@ def create_error(request):
 
 
 if __name__ == "__main__":
-    app.run(
-        host="0.0.0.0",
-        port=getenv("PORT", 8080)
-    )
+    app.run(host="0.0.0.0", port=getenv("PORT", 8080))

examples/run_asgi.py

@@ -11,7 +11,7 @@ from pathlib import Path
 from sanic import Sanic, response
 
 
-app = Sanic(__name__)
+app = Sanic("Example")
 
 
 @app.route("/text")
@@ -59,31 +59,31 @@ async def handler_stream(request):
     return response.stream(body)
 
 
-@app.listener("before_server_start")
+@app.before_server_start
 async def listener_before_server_start(*args, **kwargs):
     print("before_server_start")
 
 
-@app.listener("after_server_start")
+@app.after_server_start
 async def listener_after_server_start(*args, **kwargs):
     print("after_server_start")
 
 
-@app.listener("before_server_stop")
+@app.before_server_stop
 async def listener_before_server_stop(*args, **kwargs):
     print("before_server_stop")
 
 
-@app.listener("after_server_stop")
+@app.after_server_stop
 async def listener_after_server_stop(*args, **kwargs):
     print("after_server_stop")
 
 
-@app.middleware("request")
+@app.on_request
 async def print_on_request(request):
     print("print_on_request")
 
 
-@app.middleware("response")
+@app.on_response
 async def print_on_response(request, response):
     print("print_on_response")

examples/run_async.py

@@ -1,22 +1,30 @@
-from sanic import Sanic
-from sanic import response
-from signal import signal, SIGINT
 import asyncio
+
 import uvloop
 
-app = Sanic(__name__)
+from sanic import Sanic, response
+
+
+app = Sanic("Example")
 
 
 @app.route("/")
 async def test(request):
     return response.json({"answer": "42"})
 
-asyncio.set_event_loop(uvloop.new_event_loop())
-server = app.create_server(host="0.0.0.0", port=8000, return_asyncio_server=True)
-loop = asyncio.get_event_loop()
-task = asyncio.ensure_future(server)
-signal(SIGINT, lambda s, f: loop.stop())
-try:
-    loop.run_forever()
-except:
-    loop.stop()
+
+async def main():
+    server = await app.create_server(
+        port=8000, host="0.0.0.0", return_asyncio_server=True
+    )
+
+    if server is None:
+        return
+
+    await server.startup()
+    await server.serve_forever()
+
+
+if __name__ == "__main__":
+    asyncio.set_event_loop(uvloop.new_event_loop())
+    asyncio.run(main())

examples/run_async_advanced.py

@@ -1,32 +1,62 @@
-from sanic import Sanic
-from sanic import response
-from signal import signal, SIGINT
 import asyncio
+
+from signal import SIGINT, signal
+
 import uvloop
 
-app = Sanic(__name__)
+from sanic import Sanic, response
+from sanic.server import AsyncioServer
+
+
+app = Sanic("Example")
+
+
+@app.before_server_start
+async def before_server_start(app, loop):
+    print("Async Server starting")
+
+
+@app.after_server_start
+async def after_server_start(app, loop):
+    print("Async Server started")
+
+
+@app.before_server_stop
+async def before_server_stop(app, loop):
+    print("Async Server stopping")
+
+
+@app.after_server_stop
+async def after_server_stop(app, loop):
+    print("Async Server stopped")
 
-@app.listener('after_server_start')
-async def after_start_test(app, loop):
-    print("Async Server Started!")
 
 @app.route("/")
 async def test(request):
     return response.json({"answer": "42"})
 
+
 asyncio.set_event_loop(uvloop.new_event_loop())
-serv_coro = app.create_server(host="0.0.0.0", port=8000, return_asyncio_server=True)
+serv_coro = app.create_server(
+    host="0.0.0.0", port=8000, return_asyncio_server=True
+)
 loop = asyncio.get_event_loop()
 serv_task = asyncio.ensure_future(serv_coro, loop=loop)
 signal(SIGINT, lambda s, f: loop.stop())
-server = loop.run_until_complete(serv_task)
-server.after_start()
+server: AsyncioServer = loop.run_until_complete(serv_task)
+loop.run_until_complete(server.startup())
+
+# When using app.run(), this actually triggers before the serv_coro.
+# But, in this example, we are using the convenience method, even if it is
+# out of order.
+loop.run_until_complete(server.before_start())
+loop.run_until_complete(server.after_start())
 try:
     loop.run_forever()
-except KeyboardInterrupt as e:
+except KeyboardInterrupt:
     loop.stop()
 finally:
-    server.before_stop()
+    loop.run_until_complete(server.before_stop())
 
     # Wait for server to close
     close_task = server.close()
@@ -35,4 +65,4 @@ finally:
     # Complete all tasks on the loop
     for connection in server.connections:
         connection.close_if_idle()
-    server.after_stop()
+    loop.run_until_complete(server.after_stop())

examples/sentry_example.py

@@ -6,20 +6,19 @@ from sentry_sdk.integrations.sanic import SanicIntegration
 from sanic import Sanic
 from sanic.response import json
 
+
 sentry_init(
     dsn=getenv("SENTRY_DSN"),
     integrations=[SanicIntegration()],
 )
 
-app = Sanic(__name__)
+app = Sanic("Example")
 
 
 # noinspection PyUnusedLocal
 @app.route("/working")
 async def working_path(request):
-    return json({
-        "response": "Working API Response"
-    })
+    return json({"response": "Working API Response"})
 
 
 # noinspection PyUnusedLocal
@@ -28,8 +27,5 @@ async def raise_error(request):
     raise Exception("Testing Sentry Integration")
 
 
-if __name__ == '__main__':
-    app.run(
-        host="0.0.0.0",
-        port=getenv("PORT", 8080)
-    )
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=getenv("PORT", 8080))

examples/simple_async_view.py

@@ -1,42 +1,41 @@
 from sanic import Sanic
-from sanic.views import HTTPMethodView
 from sanic.response import text
+from sanic.views import HTTPMethodView
 
-app = Sanic('some_name')
+
+app = Sanic("some_name")
 
 
 class SimpleView(HTTPMethodView):
-
     def get(self, request):
-        return text('I am get method')
+        return text("I am get method")
 
     def post(self, request):
-        return text('I am post method')
+        return text("I am post method")
 
     def put(self, request):
-        return text('I am put method')
+        return text("I am put method")
 
     def patch(self, request):
-        return text('I am patch method')
+        return text("I am patch method")
 
     def delete(self, request):
-        return text('I am delete method')
+        return text("I am delete method")
 
 
 class SimpleAsyncView(HTTPMethodView):
-
     async def get(self, request):
-        return text('I am async get method')
+        return text("I am async get method")
 
     async def post(self, request):
-        return text('I am async post method')
+        return text("I am async post method")
 
     async def put(self, request):
-        return text('I am async put method')
+        return text("I am async put method")
 
 
-app.add_route(SimpleView.as_view(), '/')
-app.add_route(SimpleAsyncView.as_view(), '/async')
+app.add_route(SimpleView.as_view(), "/")
+app.add_route(SimpleAsyncView.as_view(), "/async")
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000, debug=True)

examples/static_assets.py

@@ -1,6 +1,6 @@
 from sanic import Sanic
 
 
-app = Sanic(__name__)
+app = Sanic("Example")
 
 app.static("/", "./static")

examples/teapot.py

@@ -1,13 +1,14 @@
 from sanic import Sanic
 from sanic import response as res
 
-app = Sanic(__name__)
+
+app = Sanic("Example")
 
 
 @app.route("/")
 async def test(req):
-    return res.text("I\'m a teapot", status=418)
+    return res.text("I'm a teapot", status=418)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000)

examples/try_everything.py

@@ -1,11 +1,11 @@
 import os
 
-from sanic import Sanic
-from sanic.log import logger as log
-from sanic import response
+from sanic import Sanic, response
 from sanic.exceptions import ServerError
+from sanic.log import logger as log
 
-app = Sanic(__name__)
+
+app = Sanic("Example")
 
 
 @app.route("/")
@@ -13,7 +13,7 @@ async def test_async(request):
     return response.json({"test": True})
 
 
-@app.route("/sync", methods=['GET', 'POST'])
+@app.route("/sync", methods=["GET", "POST"])
 def test_sync(request):
     return response.json({"test": True})
 
@@ -31,6 +31,7 @@ def exception(request):
 @app.route("/await")
 async def test_await(request):
     import asyncio
+
     await asyncio.sleep(5)
     return response.text("I'm feeling sleepy")
 
@@ -42,8 +43,10 @@ async def test_file(request):
 
 @app.route("/file_stream")
 async def test_file_stream(request):
-    return await response.file_stream(os.path.abspath("setup.py"),
-                                      chunk_size=1024)
+    return await response.file_stream(
+        os.path.abspath("setup.py"), chunk_size=1024
+    )
+
 
 # ----------------------------------------------- #
 # Exceptions
@@ -52,14 +55,17 @@ async def test_file_stream(request):
 
 @app.exception(ServerError)
 async def test(request, exception):
-    return response.json({"exception": "{}".format(exception), "status": exception.status_code},
-                         status=exception.status_code)
+    return response.json(
+        {"exception": str(exception), "status": exception.status_code},
+        status=exception.status_code,
+    )
 
 
 # ----------------------------------------------- #
 # Read from request
 # ----------------------------------------------- #
 
+
 @app.route("/json")
 def post_json(request):
     return response.json({"received": True, "message": request.json})
@@ -67,38 +73,51 @@ def post_json(request):
 
 @app.route("/form")
 def post_form_json(request):
-    return response.json({"received": True, "form_data": request.form, "test": request.form.get('test')})
+    return response.json(
+        {
+            "received": True,
+            "form_data": request.form,
+            "test": request.form.get("test"),
+        }
+    )
 
 
 @app.route("/query_string")
 def query_string(request):
-    return response.json({"parsed": True, "args": request.args, "url": request.url,
-                          "query_string": request.query_string})
+    return response.json(
+        {
+            "parsed": True,
+            "args": request.args,
+            "url": request.url,
+            "query_string": request.query_string,
+        }
+    )
 
 
 # ----------------------------------------------- #
 # Run Server
 # ----------------------------------------------- #
 
-@app.listener('before_server_start')
+
+@app.before_server_start
 def before_start(app, loop):
     log.info("SERVER STARTING")
 
 
-@app.listener('after_server_start')
+@app.after_server_start
 def after_start(app, loop):
     log.info("OH OH OH OH OHHHHHHHH")
 
 
-@app.listener('before_server_stop')
+@app.before_server_stop
 def before_stop(app, loop):
     log.info("SERVER STOPPING")
 
 
-@app.listener('after_server_stop')
+@app.after_server_stop
 def after_stop(app, loop):
     log.info("TRIED EVERYTHING")
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000, debug=True)

examples/unix_socket.py

@@ -1,23 +1,25 @@
-from sanic import Sanic
-from sanic import response
-import socket
 import os
+import socket
 
-app = Sanic(__name__)
+from sanic import Sanic, response
+
+
+app = Sanic("Example")
 
 
 @app.route("/test")
 async def test(request):
     return response.text("OK")
 
-if __name__ == '__main__':
-    server_address = './uds_socket'
+
+if __name__ == "__main__":
+    server_address = "./uds_socket"
     # Make sure the socket does not already exist
     try:
-            os.unlink(server_address)
+        os.unlink(server_address)
     except OSError:
-            if os.path.exists(server_address):
-                        raise
+        if os.path.exists(server_address):
+            raise
     sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
     sock.bind(server_address)
     app.run(sock=sock)

examples/url_for_example.py

@@ -1,20 +1,21 @@
-from sanic import Sanic
-from sanic import response
-
-app = Sanic(__name__)
+from sanic import Sanic, response
 
 
-@app.route('/')
+app = Sanic("Example")
+
+
+@app.route("/")
 async def index(request):
     # generate a URL for the endpoint `post_handler`
-    url = app.url_for('post_handler', post_id=5)
+    url = app.url_for("post_handler", post_id=5)
     # the URL is `/posts/5`, redirect to it
     return response.redirect(url)
 
 
-@app.route('/posts/<post_id>')
+@app.route("/posts/<post_id>")
 async def post_handler(request, post_id):
-    return response.text('Post - {}'.format(post_id))
-    
-if __name__ == '__main__':
+    return response.text("Post - {}".format(post_id))
+
+
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000, debug=True)

examples/versioned_blueprint_group.py

@@ -8,7 +8,9 @@ app = Sanic(name="blue-print-group-version-example")
 bp1 = Blueprint(name="ultron", url_prefix="/ultron")
 bp2 = Blueprint(name="vision", url_prefix="/vision", strict_slashes=None)
 
-bpg = Blueprint.group([bp1, bp2], url_prefix="/sentient/robot", version=1, strict_slashes=True)
+bpg = Blueprint.group(
+    bp1, bp2, url_prefix="/sentient/robot", version=1, strict_slashes=True
+)
 
 
 @bp1.get("/name")
@@ -31,5 +33,5 @@ async def bp2_revised_name(request):
 
 app.blueprint(bpg)
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000)

examples/vhosts.py

@@ -8,7 +8,7 @@ from sanic.blueprints import Blueprint
 # curl -H "Host: bp.example.com" localhost:8000/question
 # curl -H "Host: bp.example.com" localhost:8000/answer
 
-app = Sanic(__name__)
+app = Sanic("Example")
 bp = Blueprint("bp", host="bp.example.com")
 
 

examples/websocket.py

@@ -1,24 +1,27 @@
 from sanic import Sanic
-from sanic.response import file
-
-app = Sanic(__name__)
+from sanic.response import redirect
 
 
-@app.route('/')
-async def index(request):
-    return await file('websocket.html')
+app = Sanic("Example")
 
 
-@app.websocket('/feed')
+app.static("index.html", "websocket.html")
+
+
+@app.route("/")
+def index(request):
+    return redirect("index.html")
+
+
+@app.websocket("/feed")
 async def feed(request, ws):
     while True:
-        data = 'hello!'
-        print('Sending: ' + data)
+        data = "hello!"
+        print("Sending: " + data)
         await ws.send(data)
         data = await ws.recv()
-        print('Received: ' + data)
+        print("Received: " + data)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     app.run(host="0.0.0.0", port=8000, debug=True)
-

hack/Dockerfile

@@ -1,6 +0,0 @@
-FROM catthehacker/ubuntu:act-latest
-SHELL [ "/bin/bash", "-c" ]
-ENTRYPOINT []
-RUN apt-get update
-RUN apt-get install gcc -y
-RUN apt-get install -y --no-install-recommends g++

pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools", "wheel"]
+build-backend = "setuptools.build_meta"

sanic/__main__.py

@@ -1,196 +1,15 @@
-import os
-import sys
-
-from argparse import ArgumentParser, RawTextHelpFormatter
-from importlib import import_module
-from pathlib import Path
-from typing import Any, Dict, Optional
-
-from sanic_routing import __version__ as __routing_version__  # type: ignore
-
-from sanic import __version__
-from sanic.app import Sanic
-from sanic.config import BASE_LOGO
-from sanic.log import error_logger
-from sanic.simple import create_simple_server
+from sanic.cli.app import SanicCLI
+from sanic.compat import OS_IS_WINDOWS, enable_windows_color_support
 
 
-class SanicArgumentParser(ArgumentParser):
-    def add_bool_arguments(self, *args, **kwargs):
-        group = self.add_mutually_exclusive_group()
-        group.add_argument(*args, action="store_true", **kwargs)
-        kwargs["help"] = f"no {kwargs['help']}\n "
-        group.add_argument(
-            "--no-" + args[0][2:], *args[1:], action="store_false", **kwargs
-        )
+if OS_IS_WINDOWS:
+    enable_windows_color_support()
 
 
 def main():
-    parser = SanicArgumentParser(
-        prog="sanic",
-        description=BASE_LOGO,
-        formatter_class=lambda prog: RawTextHelpFormatter(
-            prog, max_help_position=33
-        ),
-    )
-    parser.add_argument(
-        "-v",
-        "--version",
-        action="version",
-        version=f"Sanic {__version__}; Routing {__routing_version__}",
-    )
-    parser.add_argument(
-        "--factory",
-        action="store_true",
-        help=(
-            "Treat app as an application factory, "
-            "i.e. a () -> <Sanic app> callable"
-        ),
-    )
-    parser.add_argument(
-        "-s",
-        "--simple",
-        dest="simple",
-        action="store_true",
-        help="Run Sanic as a Simple Server (module arg should be a path)\n ",
-    )
-    parser.add_argument(
-        "-H",
-        "--host",
-        dest="host",
-        type=str,
-        default="127.0.0.1",
-        help="Host address [default 127.0.0.1]",
-    )
-    parser.add_argument(
-        "-p",
-        "--port",
-        dest="port",
-        type=int,
-        default=8000,
-        help="Port to serve on [default 8000]",
-    )
-    parser.add_argument(
-        "-u",
-        "--unix",
-        dest="unix",
-        type=str,
-        default="",
-        help="location of unix socket\n ",
-    )
-    parser.add_argument(
-        "--cert", dest="cert", type=str, help="Location of certificate for SSL"
-    )
-    parser.add_argument(
-        "--key", dest="key", type=str, help="location of keyfile for SSL\n "
-    )
-    parser.add_bool_arguments(
-        "--access-logs", dest="access_log", help="display access logs"
-    )
-    parser.add_argument(
-        "-w",
-        "--workers",
-        dest="workers",
-        type=int,
-        default=1,
-        help="number of worker processes [default 1]\n ",
-    )
-    parser.add_argument("-d", "--debug", dest="debug", action="store_true")
-    parser.add_argument(
-        "-r",
-        "--reload",
-        "--auto-reload",
-        dest="auto_reload",
-        action="store_true",
-        help="Watch source directory for file changes and reload on changes",
-    )
-    parser.add_argument(
-        "-R",
-        "--reload-dir",
-        dest="path",
-        action="append",
-        help="Extra directories to watch and reload on changes\n ",
-    )
-    parser.add_argument(
-        "module",
-        help=(
-            "Path to your Sanic app. Example: path.to.server:app\n"
-            "If running a Simple Server, path to directory to serve. "
-            "Example: ./\n"
-        ),
-    )
-    args = parser.parse_args()
-
-    try:
-        module_path = os.path.abspath(os.getcwd())
-        if module_path not in sys.path:
-            sys.path.append(module_path)
-
-        if args.simple:
-            path = Path(args.module)
-            app = create_simple_server(path)
-        else:
-            delimiter = ":" if ":" in args.module else "."
-            module_name, app_name = args.module.rsplit(delimiter, 1)
-
-            if app_name.endswith("()"):
-                args.factory = True
-                app_name = app_name[:-2]
-
-            module = import_module(module_name)
-            app = getattr(module, app_name, None)
-            if args.factory:
-                app = app()
-
-            app_type_name = type(app).__name__
-
-            if not isinstance(app, Sanic):
-                raise ValueError(
-                    f"Module is not a Sanic app, it is a {app_type_name}.  "
-                    f"Perhaps you meant {args.module}.app?"
-                )
-        if args.cert is not None or args.key is not None:
-            ssl: Optional[Dict[str, Any]] = {
-                "cert": args.cert,
-                "key": args.key,
-            }
-        else:
-            ssl = None
-
-        kwargs = {
-            "host": args.host,
-            "port": args.port,
-            "unix": args.unix,
-            "workers": args.workers,
-            "debug": args.debug,
-            "access_log": args.access_log,
-            "ssl": ssl,
-        }
-        if args.auto_reload:
-            kwargs["auto_reload"] = True
-
-        if args.path:
-            if args.auto_reload or args.debug:
-                kwargs["reload_dir"] = args.path
-            else:
-                error_logger.warning(
-                    "Ignoring '--reload-dir' since auto reloading was not "
-                    "enabled. If you would like to watch directories for "
-                    "changes, consider using --debug or --auto-reload."
-                )
-
-        app.run(**kwargs)
-    except ImportError as e:
-        if module_name.startswith(e.name):
-            error_logger.error(
-                f"No module named {e.name} found.\n"
-                "  Example File: project/sanic_server.py -> app\n"
-                "  Example Module: project.sanic_server.app"
-            )
-        else:
-            raise e
-    except ValueError:
-        error_logger.exception("Failed to run app")
+    cli = SanicCLI()
+    cli.attach()
+    cli.run()
 
 
 if __name__ == "__main__":

sanic/__version__.py

@@ -1 +1 @@
-__version__ = "21.6.2"
+__version__ = "21.12.1"

sanic/application/ext.py

@@ -0,0 +1,39 @@
+from __future__ import annotations
+
+from contextlib import suppress
+from importlib import import_module
+from typing import TYPE_CHECKING
+
+
+if TYPE_CHECKING:  # no cov
+    from sanic import Sanic
+
+    try:
+        from sanic_ext import Extend  # type: ignore
+    except ImportError:
+        ...
+
+
+def setup_ext(app: Sanic, *, fail: bool = False, **kwargs):
+    if not app.config.AUTO_EXTEND:
+        return
+
+    sanic_ext = None
+    with suppress(ModuleNotFoundError):
+        sanic_ext = import_module("sanic_ext")
+
+    if not sanic_ext:
+        if fail:
+            raise RuntimeError(
+                "Sanic Extensions is not installed. You can add it to your "
+                "environment using:\n$ pip install sanic[ext]\nor\n$ pip "
+                "install sanic-ext"
+            )
+
+        return
+
+    if not getattr(app, "_ext", None):
+        Ext: Extend = getattr(sanic_ext, "Extend")
+        app._ext = Ext(app, **kwargs)
+
+        return app.ext

sanic/application/logo.py

@@ -0,0 +1,57 @@
+import re
+import sys
+
+from os import environ
+
+
+BASE_LOGO = """
+
+                 Sanic
+         Build Fast. Run Fast.
+
+"""
+COFFEE_LOGO = """\033[48;2;255;13;104m                     \033[0m
+\033[38;2;255;255;255;48;2;255;13;104m     ▄████████▄      \033[0m
+\033[38;2;255;255;255;48;2;255;13;104m    ██       ██▀▀▄   \033[0m
+\033[38;2;255;255;255;48;2;255;13;104m    ███████████  █   \033[0m
+\033[38;2;255;255;255;48;2;255;13;104m    ███████████▄▄▀   \033[0m
+\033[38;2;255;255;255;48;2;255;13;104m     ▀███████▀       \033[0m
+\033[48;2;255;13;104m                     \033[0m
+Dark roast. No sugar."""
+
+COLOR_LOGO = """\033[48;2;255;13;104m                     \033[0m
+\033[38;2;255;255;255;48;2;255;13;104m    ▄███ █████ ██    \033[0m
+\033[38;2;255;255;255;48;2;255;13;104m   ██                \033[0m
+\033[38;2;255;255;255;48;2;255;13;104m    ▀███████ ███▄    \033[0m
+\033[38;2;255;255;255;48;2;255;13;104m                ██   \033[0m
+\033[38;2;255;255;255;48;2;255;13;104m   ████ ████████▀    \033[0m
+\033[48;2;255;13;104m                     \033[0m
+Build Fast. Run Fast."""
+
+FULL_COLOR_LOGO = """
+
+\033[38;2;255;13;104m  ▄███ █████ ██ \033[0m     ▄█▄      ██       █   █   ▄██████████
+\033[38;2;255;13;104m ██             \033[0m    █   █     █ ██     █   █  ██
+\033[38;2;255;13;104m  ▀███████ ███▄ \033[0m   ▀     █    █   ██   ▄   █  ██
+\033[38;2;255;13;104m              ██\033[0m  █████████   █     ██ █   █  ▄▄
+\033[38;2;255;13;104m ████ ████████▀ \033[0m █         █  █       ██   █   ▀██ ███████
+
+"""  # noqa
+
+ansi_pattern = re.compile(r"\x1B(?:[@-Z\\-_]|\[[0-?]*[ -/]*[@-~])")
+
+
+def get_logo(full=False, coffee=False):
+    logo = (
+        (FULL_COLOR_LOGO if full else (COFFEE_LOGO if coffee else COLOR_LOGO))
+        if sys.stdout.isatty()
+        else BASE_LOGO
+    )
+
+    if (
+        sys.platform == "darwin"
+        and environ.get("TERM_PROGRAM") == "Apple_Terminal"
+    ):
+        logo = ansi_pattern.sub("", logo)
+
+    return logo

sanic/application/motd.py

@@ -0,0 +1,143 @@
+import sys
+
+from abc import ABC, abstractmethod
+from shutil import get_terminal_size
+from textwrap import indent, wrap
+from typing import Dict, Optional
+
+from sanic import __version__
+from sanic.log import logger
+
+
+class MOTD(ABC):
+    def __init__(
+        self,
+        logo: Optional[str],
+        serve_location: str,
+        data: Dict[str, str],
+        extra: Dict[str, str],
+    ) -> None:
+        self.logo = logo
+        self.serve_location = serve_location
+        self.data = data
+        self.extra = extra
+        self.key_width = 0
+        self.value_width = 0
+
+    @abstractmethod
+    def display(self):
+        ...  # noqa
+
+    @classmethod
+    def output(
+        cls,
+        logo: Optional[str],
+        serve_location: str,
+        data: Dict[str, str],
+        extra: Dict[str, str],
+    ) -> None:
+        motd_class = MOTDTTY if sys.stdout.isatty() else MOTDBasic
+        motd_class(logo, serve_location, data, extra).display()
+
+
+class MOTDBasic(MOTD):
+    def display(self):
+        if self.logo:
+            logger.debug(self.logo)
+        lines = [f"Sanic v{__version__}"]
+        if self.serve_location:
+            lines.append(f"Goin' Fast @ {self.serve_location}")
+        lines += [
+            *(f"{key}: {value}" for key, value in self.data.items()),
+            *(f"{key}: {value}" for key, value in self.extra.items()),
+        ]
+        for line in lines:
+            logger.info(line)
+
+
+class MOTDTTY(MOTD):
+    def __init__(self, *args, **kwargs) -> None:
+        super().__init__(*args, **kwargs)
+        self.set_variables()
+
+    def set_variables(self):  # no  cov
+        fallback = (108, 24)
+        terminal_width = max(
+            get_terminal_size(fallback=fallback).columns, fallback[0]
+        )
+        self.max_value_width = terminal_width - fallback[0] + 36
+
+        self.key_width = 4
+        self.value_width = self.max_value_width
+        if self.data:
+            self.key_width = max(map(len, self.data.keys()))
+            self.value_width = min(
+                max(map(len, self.data.values())), self.max_value_width
+            )
+        self.logo_lines = self.logo.split("\n") if self.logo else []
+        self.logo_line_length = 24
+        self.centering_length = (
+            self.key_width + self.value_width + 2 + self.logo_line_length
+        )
+        self.display_length = self.key_width + self.value_width + 2
+
+    def display(self):
+        version = f"Sanic v{__version__}".center(self.centering_length)
+        running = (
+            f"Goin' Fast @ {self.serve_location}"
+            if self.serve_location
+            else ""
+        ).center(self.centering_length)
+        length = len(version) + 2 - self.logo_line_length
+        first_filler = "─" * (self.logo_line_length - 1)
+        second_filler = "─" * length
+        display_filler = "─" * (self.display_length + 2)
+        lines = [
+            f"\n┌{first_filler}─{second_filler}┐",
+            f"│ {version} │",
+            f"│ {running} │",
+            f"├{first_filler}┬{second_filler}┤",
+        ]
+
+        self._render_data(lines, self.data, 0)
+        if self.extra:
+            logo_part = self._get_logo_part(len(lines) - 4)
+            lines.append(f"| {logo_part} ├{display_filler}┤")
+            self._render_data(lines, self.extra, len(lines) - 4)
+
+        self._render_fill(lines)
+
+        lines.append(f"└{first_filler}┴{second_filler}┘\n")
+        logger.info(indent("\n".join(lines), "  "))
+
+    def _render_data(self, lines, data, start):
+        offset = 0
+        for idx, (key, value) in enumerate(data.items(), start=start):
+            key = key.rjust(self.key_width)
+
+            wrapped = wrap(value, self.max_value_width, break_on_hyphens=False)
+            for wrap_index, part in enumerate(wrapped):
+                part = part.ljust(self.value_width)
+                logo_part = self._get_logo_part(idx + offset + wrap_index)
+                display = (
+                    f"{key}: {part}"
+                    if wrap_index == 0
+                    else (" " * len(key) + f"  {part}")
+                )
+                lines.append(f"│ {logo_part} │ {display} │")
+                if wrap_index:
+                    offset += 1
+
+    def _render_fill(self, lines):
+        filler = " " * self.display_length
+        idx = len(lines) - 5
+        for i in range(1, len(self.logo_lines) - idx):
+            logo_part = self.logo_lines[idx + i]
+            lines.append(f"│ {logo_part} │ {filler} │")
+
+    def _get_logo_part(self, idx):
+        try:
+            logo_part = self.logo_lines[idx]
+        except IndexError:
+            logo_part = " " * (self.logo_line_length - 3)
+        return logo_part

sanic/application/state.py

@@ -0,0 +1,79 @@
+from __future__ import annotations
+
+import logging
+
+from dataclasses import dataclass, field
+from enum import Enum, auto
+from pathlib import Path
+from socket import socket
+from ssl import SSLContext
+from typing import TYPE_CHECKING, Any, Optional, Set, Union
+
+from sanic.log import logger
+
+
+if TYPE_CHECKING:
+    from sanic import Sanic
+
+
+class StrEnum(str, Enum):
+    def _generate_next_value_(name: str, *args) -> str:  # type: ignore
+        return name.lower()
+
+
+class Server(StrEnum):
+    SANIC = auto()
+    ASGI = auto()
+    GUNICORN = auto()
+
+
+class Mode(StrEnum):
+    PRODUCTION = auto()
+    DEBUG = auto()
+
+
+@dataclass
+class ApplicationState:
+    app: Sanic
+    asgi: bool = field(default=False)
+    coffee: bool = field(default=False)
+    fast: bool = field(default=False)
+    host: str = field(default="")
+    port: int = field(default=0)
+    ssl: Optional[SSLContext] = field(default=None)
+    sock: Optional[socket] = field(default=None)
+    unix: Optional[str] = field(default=None)
+    mode: Mode = field(default=Mode.PRODUCTION)
+    reload_dirs: Set[Path] = field(default_factory=set)
+    server: Server = field(default=Server.SANIC)
+    is_running: bool = field(default=False)
+    is_started: bool = field(default=False)
+    is_stopping: bool = field(default=False)
+    verbosity: int = field(default=0)
+    workers: int = field(default=0)
+
+    # This property relates to the ApplicationState instance and should
+    # not be changed except in the __post_init__ method
+    _init: bool = field(default=False)
+
+    def __post_init__(self) -> None:
+        self._init = True
+
+    def __setattr__(self, name: str, value: Any) -> None:
+        if self._init and name == "_init":
+            raise RuntimeError(
+                "Cannot change the value of _init after instantiation"
+            )
+        super().__setattr__(name, value)
+        if self._init and hasattr(self, f"set_{name}"):
+            getattr(self, f"set_{name}")(value)
+
+    def set_mode(self, value: Union[str, Mode]):
+        if hasattr(self.app, "error_handler"):
+            self.app.error_handler.debug = self.app.debug
+        if getattr(self.app, "configure_logging", False) and self.app.debug:
+            logger.setLevel(logging.DEBUG)
+
+    @property
+    def is_debug(self):
+        return self.mode is Mode.DEBUG

sanic/asgi.py

@@ -1,6 +1,5 @@
 import warnings
 
-from inspect import isawaitable
 from typing import Optional
 from urllib.parse import quote
 
@@ -8,24 +7,33 @@ import sanic.app  # noqa
 
 from sanic.compat import Header
 from sanic.exceptions import ServerError
+from sanic.helpers import _default
+from sanic.http import Stage
 from sanic.models.asgi import ASGIReceive, ASGIScope, ASGISend, MockTransport
 from sanic.request import Request
+from sanic.response import BaseHTTPResponse
 from sanic.server import ConnInfo
-from sanic.websocket import WebSocketConnection
+from sanic.server.websockets.connection import WebSocketConnection
 
 
 class Lifespan:
     def __init__(self, asgi_app: "ASGIApp") -> None:
         self.asgi_app = asgi_app
 
-        if "before_server_start" in self.asgi_app.sanic_app.listeners:
+        if (
+            "server.init.before"
+            in self.asgi_app.sanic_app.signal_router.name_index
+        ):
             warnings.warn(
                 'You have set a listener for "before_server_start" '
                 "in ASGI mode. "
                 "It will be executed as early as possible, but not before "
                 "the ASGI server is started."
             )
-        if "after_server_stop" in self.asgi_app.sanic_app.listeners:
+        if (
+            "server.shutdown.after"
+            in self.asgi_app.sanic_app.signal_router.name_index
+        ):
             warnings.warn(
                 'You have set a listener for "after_server_stop" '
                 "in ASGI mode. "
@@ -42,19 +50,16 @@ class Lifespan:
         in sequence since the ASGI lifespan protocol only supports a single
         startup event.
         """
-        self.asgi_app.sanic_app.router.finalize()
-        if self.asgi_app.sanic_app.signal_router.routes:
-            self.asgi_app.sanic_app.signal_router.finalize()
-        listeners = self.asgi_app.sanic_app.listeners.get(
-            "before_server_start", []
-        ) + self.asgi_app.sanic_app.listeners.get("after_server_start", [])
+        await self.asgi_app.sanic_app._startup()
+        await self.asgi_app.sanic_app._server_event("init", "before")
+        await self.asgi_app.sanic_app._server_event("init", "after")
 
-        for handler in listeners:
-            response = handler(
-                self.asgi_app.sanic_app, self.asgi_app.sanic_app.loop
+        if self.asgi_app.sanic_app.config.USE_UVLOOP is not _default:
+            warnings.warn(
+                "You have set the USE_UVLOOP configuration option, but Sanic "
+                "cannot control the event loop when running in ASGI mode."
+                "This option will be ignored."
             )
-            if response and isawaitable(response):
-                await response
 
     async def shutdown(self) -> None:
         """
@@ -65,16 +70,8 @@ class Lifespan:
         in sequence since the ASGI lifespan protocol only supports a single
         shutdown event.
         """
-        listeners = self.asgi_app.sanic_app.listeners.get(
-            "before_server_stop", []
-        ) + self.asgi_app.sanic_app.listeners.get("after_server_stop", [])
-
-        for handler in listeners:
-            response = handler(
-                self.asgi_app.sanic_app, self.asgi_app.sanic_app.loop
-            )
-            if response and isawaitable(response):
-                await response
+        await self.asgi_app.sanic_app._server_event("shutdown", "before")
+        await self.asgi_app.sanic_app._server_event("shutdown", "after")
 
     async def __call__(
         self, scope: ASGIScope, receive: ASGIReceive, send: ASGISend
@@ -96,6 +93,8 @@ class ASGIApp:
     transport: MockTransport
     lifespan: Lifespan
     ws: Optional[WebSocketConnection]
+    stage: Stage
+    response: Optional[BaseHTTPResponse]
 
     def __init__(self) -> None:
         self.ws = None
@@ -108,6 +107,8 @@ class ASGIApp:
         instance.sanic_app = sanic_app
         instance.transport = MockTransport(scope, receive, send)
         instance.transport.loop = sanic_app.loop
+        instance.stage = Stage.IDLE
+        instance.response = None
         setattr(instance.transport, "add_task", sanic_app.loop.create_task)
 
         headers = Header(
@@ -162,6 +163,8 @@ class ASGIApp:
         """
         Read and stream the body in chunks from an incoming ASGI message.
         """
+        if self.stage is Stage.IDLE:
+            self.stage = Stage.REQUEST
         message = await self.transport.receive()
         body = message.get("body", b"")
         if not message.get("more_body", False):
@@ -176,11 +179,17 @@ class ASGIApp:
             if data:
                 yield data
 
-    def respond(self, response):
+    def respond(self, response: BaseHTTPResponse):
+        if self.stage is not Stage.HANDLER:
+            self.stage = Stage.FAILED
+            raise RuntimeError("Response already started")
+        if self.response is not None:
+            self.response.stream = None
         response.stream, self.response = self, response
         return response
 
     async def send(self, data, end_stream):
+        self.stage = Stage.IDLE if end_stream else Stage.RESPONSE
         if self.response:
             response, self.response = self.response, None
             await self.transport.send(
@@ -208,6 +217,7 @@ class ASGIApp:
         Handle the incoming request.
         """
         try:
+            self.stage = Stage.HANDLER
             await self.sanic_app.handle_request(self.request)
         except Exception as e:
             await self.sanic_app.handle_exception(self.request, e)

sanic/base/meta.py

@@ -0,0 +1,6 @@
+class SanicMeta(type):
+    @classmethod
+    def __prepare__(metaclass, name, bases, **kwds):
+        cls = super().__prepare__(metaclass, name, bases, **kwds)
+        cls["__slots__"] = ()
+        return cls

sanic/base/root.py

@@ -1,8 +1,8 @@
 import re
 
-from typing import Any, Tuple
-from warnings import warn
+from typing import Any
 
+from sanic.base.meta import SanicMeta
 from sanic.exceptions import SanicException
 from sanic.mixins.exceptions import ExceptionMixin
 from sanic.mixins.listeners import ListenerMixin
@@ -11,7 +11,7 @@ from sanic.mixins.routes import RouteMixin
 from sanic.mixins.signals import SignalMixin
 
 
-VALID_NAME = re.compile(r"^[a-zA-Z][a-zA-Z0-9_\-]*$")
+VALID_NAME = re.compile(r"^[a-zA-Z_][a-zA-Z0-9_\-]*$")
 
 
 class BaseSanic(
@@ -20,10 +20,11 @@ class BaseSanic(
     ListenerMixin,
     ExceptionMixin,
     SignalMixin,
+    metaclass=SanicMeta,
 ):
-    __fake_slots__: Tuple[str, ...]
+    __slots__ = ("name",)
 
-    def __init__(self, name: str = None, *args, **kwargs) -> None:
+    def __init__(self, name: str = None, *args: Any, **kwargs: Any) -> None:
         class_name = self.__class__.__name__
 
         if name is None:
@@ -33,11 +34,10 @@ class BaseSanic(
             )
 
         if not VALID_NAME.match(name):
-            warn(
-                f"{class_name} instance named '{name}' uses a format that is"
-                f"deprecated. Starting in version 21.12, {class_name} objects "
-                "must be named only using alphanumeric characters, _, or -.",
-                DeprecationWarning,
+            raise SanicException(
+                f"{class_name} instance named '{name}' uses an invalid "
+                "format. Names must begin with a character and may only "
+                "contain alphanumeric characters, _, or -."
             )
 
         self.name = name
@@ -52,15 +52,12 @@ class BaseSanic(
         return f'{self.__class__.__name__}(name="{self.name}")'
 
     def __setattr__(self, name: str, value: Any) -> None:
-        # This is a temporary compat layer so we can raise a warning until
-        # setting attributes on the app instance can be removed and deprecated
-        # with a proper implementation of __slots__
-        if name not in self.__fake_slots__:
-            warn(
+        try:
+            super().__setattr__(name, value)
+        except AttributeError as e:
+            raise AttributeError(
                 f"Setting variables on {self.__class__.__name__} instances is "
-                "deprecated and will be removed in version 21.9. You should "
-                f"change your {self.__class__.__name__} instance to use "
+                "not allowed. You should change your "
+                f"{self.__class__.__name__} instance to use "
                 f"instance.ctx.{name} instead.",
-                DeprecationWarning,
-            )
-        super().__setattr__(name, value)
+            ) from e

sanic/blueprint_group.py

@@ -1,10 +1,11 @@
 from __future__ import annotations
 
 from collections.abc import MutableSequence
+from functools import partial
 from typing import TYPE_CHECKING, List, Optional, Union
 
 
-if TYPE_CHECKING:
+if TYPE_CHECKING:  # no cov
     from sanic.blueprints import Blueprint
 
 
@@ -196,6 +197,27 @@ class BlueprintGroup(MutableSequence):
         """
         self._blueprints.append(value)
 
+    def exception(self, *exceptions, **kwargs):
+        """
+        A decorator that can be used to implement a global exception handler
+        for all the Blueprints that belong to this Blueprint Group.
+
+        In case of nested Blueprint Groups, the same handler is applied
+        across each of the Blueprints recursively.
+
+        :param args: List of Python exceptions to be caught by the handler
+        :param kwargs: Additional optional arguments to be passed to the
+            exception handler
+        :return: a decorated method to handle global exceptions for any
+            blueprint registered under this group.
+        """
+
+        def register_exception_handler_for_blueprints(fn):
+            for blueprint in self.blueprints:
+                blueprint.exception(*exceptions, **kwargs)(fn)
+
+        return register_exception_handler_for_blueprints
+
     def insert(self, index: int, item: Blueprint) -> None:
         """
         The Abstract class `MutableSequence` leverages this insert method to
@@ -229,3 +251,15 @@ class BlueprintGroup(MutableSequence):
             args = list(args)[1:]
             return register_middleware_for_blueprints(fn)
         return register_middleware_for_blueprints
+
+    def on_request(self, middleware=None):
+        if callable(middleware):
+            return self.middleware(middleware, "request")
+        else:
+            return partial(self.middleware, attach_to="request")
+
+    def on_response(self, middleware=None):
+        if callable(middleware):
+            return self.middleware(middleware, "response")
+        else:
+            return partial(self.middleware, attach_to="response")

sanic/blueprints.py

@@ -3,15 +3,31 @@ from __future__ import annotations
 import asyncio
 
 from collections import defaultdict
+from copy import deepcopy
+from functools import wraps
+from inspect import isfunction
+from itertools import chain
 from types import SimpleNamespace
-from typing import TYPE_CHECKING, Dict, Iterable, List, Optional, Set, Union
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Dict,
+    Iterable,
+    List,
+    Optional,
+    Sequence,
+    Set,
+    Tuple,
+    Union,
+)
 
 from sanic_routing.exceptions import NotFound  # type: ignore
 from sanic_routing.route import Route  # type: ignore
 
-from sanic.base import BaseSanic
+from sanic.base.root import BaseSanic
 from sanic.blueprint_group import BlueprintGroup
 from sanic.exceptions import SanicException
+from sanic.helpers import Default, _default
 from sanic.models.futures import FutureRoute, FutureStatic
 from sanic.models.handler_types import (
     ListenerType,
@@ -20,8 +36,34 @@ from sanic.models.handler_types import (
 )
 
 
-if TYPE_CHECKING:
-    from sanic import Sanic  # noqa
+if TYPE_CHECKING:  # no cov
+    from sanic import Sanic
+
+
+def lazy(func, as_decorator=True):
+    @wraps(func)
+    def decorator(bp, *args, **kwargs):
+        nonlocal as_decorator
+        kwargs["apply"] = False
+        pass_handler = None
+
+        if args and isfunction(args[0]):
+            as_decorator = False
+
+        def wrapper(handler):
+            future = func(bp, *args, **kwargs)
+            if as_decorator:
+                future = future(handler)
+
+            if bp.registered:
+                for app in bp.apps:
+                    bp.register(app, {})
+
+            return future
+
+        return wrapper if as_decorator else wrapper(pass_handler)
+
+    return decorator
 
 
 class Blueprint(BaseSanic):
@@ -37,13 +79,13 @@ class Blueprint(BaseSanic):
 
     :param name: unique name of the blueprint
     :param url_prefix: URL to be prefixed before all route URLs
-    :param host: IP Address of FQDN for the sanic server to use.
+    :param host: IP Address or FQDN for the sanic server to use.
     :param version: Blueprint Version
     :param strict_slashes: Enforce the API urls are requested with a
-        training */*
+        trailing */*
     """
 
-    __fake_slots__ = (
+    __slots__ = (
         "_apps",
         "_future_routes",
         "_future_statics",
@@ -56,7 +98,6 @@ class Blueprint(BaseSanic):
         "host",
         "listeners",
         "middlewares",
-        "name",
         "routes",
         "statics",
         "strict_slashes",
@@ -70,21 +111,15 @@ class Blueprint(BaseSanic):
         self,
         name: str = None,
         url_prefix: Optional[str] = None,
-        host: Optional[str] = None,
+        host: Optional[Union[List[str], str]] = None,
         version: Optional[Union[int, str, float]] = None,
         strict_slashes: Optional[bool] = None,
         version_prefix: str = "/v",
     ):
         super().__init__(name=name)
-
-        self._apps: Set[Sanic] = set()
+        self.reset()
         self.ctx = SimpleNamespace()
-        self.exceptions: List[RouteHandler] = []
         self.host = host
-        self.listeners: Dict[str, List[ListenerType]] = {}
-        self.middlewares: List[MiddlewareType] = []
-        self.routes: List[Route] = []
-        self.statics: List[RouteHandler] = []
         self.strict_slashes = strict_slashes
         self.url_prefix = (
             url_prefix[:-1]
@@ -93,7 +128,6 @@ class Blueprint(BaseSanic):
         )
         self.version = version
         self.version_prefix = version_prefix
-        self.websocket_routes: List[Route] = []
 
     def __repr__(self) -> str:
         args = ", ".join(
@@ -120,38 +154,100 @@ class Blueprint(BaseSanic):
             )
         return self._apps
 
-    def route(self, *args, **kwargs):
-        kwargs["apply"] = False
-        return super().route(*args, **kwargs)
+    @property
+    def registered(self) -> bool:
+        return bool(self._apps)
 
-    def static(self, *args, **kwargs):
-        kwargs["apply"] = False
-        return super().static(*args, **kwargs)
+    exception = lazy(BaseSanic.exception)
+    listener = lazy(BaseSanic.listener)
+    middleware = lazy(BaseSanic.middleware)
+    route = lazy(BaseSanic.route)
+    signal = lazy(BaseSanic.signal)
+    static = lazy(BaseSanic.static, as_decorator=False)
 
-    def middleware(self, *args, **kwargs):
-        kwargs["apply"] = False
-        return super().middleware(*args, **kwargs)
+    def reset(self):
+        self._apps: Set[Sanic] = set()
+        self.exceptions: List[RouteHandler] = []
+        self.listeners: Dict[str, List[ListenerType[Any]]] = {}
+        self.middlewares: List[MiddlewareType] = []
+        self.routes: List[Route] = []
+        self.statics: List[RouteHandler] = []
+        self.websocket_routes: List[Route] = []
 
-    def listener(self, *args, **kwargs):
-        kwargs["apply"] = False
-        return super().listener(*args, **kwargs)
+    def copy(
+        self,
+        name: str,
+        url_prefix: Optional[Union[str, Default]] = _default,
+        version: Optional[Union[int, str, float, Default]] = _default,
+        version_prefix: Union[str, Default] = _default,
+        strict_slashes: Optional[Union[bool, Default]] = _default,
+        with_registration: bool = True,
+        with_ctx: bool = False,
+    ):
+        """
+        Copy a blueprint instance with some optional parameters to
+        override the values of attributes in the old instance.
 
-    def exception(self, *args, **kwargs):
-        kwargs["apply"] = False
-        return super().exception(*args, **kwargs)
+        :param name: unique name of the blueprint
+        :param url_prefix: URL to be prefixed before all route URLs
+        :param version: Blueprint Version
+        :param version_prefix: the prefix of the version number shown in the
+            URL.
+        :param strict_slashes: Enforce the API urls are requested with a
+            trailing */*
+        :param with_registration: whether register new blueprint instance with
+            sanic apps that were registered with the old instance or not.
+        :param with_ctx: whether ``ctx`` will be copied or not.
+        """
 
-    def signal(self, event: str, *args, **kwargs):
-        kwargs["apply"] = False
-        return super().signal(event, *args, **kwargs)
+        attrs_backup = {
+            "_apps": self._apps,
+            "routes": self.routes,
+            "websocket_routes": self.websocket_routes,
+            "middlewares": self.middlewares,
+            "exceptions": self.exceptions,
+            "listeners": self.listeners,
+            "statics": self.statics,
+        }
+
+        self.reset()
+        new_bp = deepcopy(self)
+        new_bp.name = name
+
+        if not isinstance(url_prefix, Default):
+            new_bp.url_prefix = url_prefix
+        if not isinstance(version, Default):
+            new_bp.version = version
+        if not isinstance(strict_slashes, Default):
+            new_bp.strict_slashes = strict_slashes
+        if not isinstance(version_prefix, Default):
+            new_bp.version_prefix = version_prefix
+
+        for key, value in attrs_backup.items():
+            setattr(self, key, value)
+
+        if with_registration and self._apps:
+            if new_bp._future_statics:
+                raise SanicException(
+                    "Static routes registered with the old blueprint instance,"
+                    " cannot be registered again."
+                )
+            for app in self._apps:
+                app.blueprint(new_bp)
+
+        if not with_ctx:
+            new_bp.ctx = SimpleNamespace()
+
+        return new_bp
 
     @staticmethod
     def group(
-        *blueprints,
-        url_prefix="",
-        version=None,
-        strict_slashes=None,
+        *blueprints: Union[Blueprint, BlueprintGroup],
+        url_prefix: Optional[str] = None,
+        version: Optional[Union[int, str, float]] = None,
+        strict_slashes: Optional[bool] = None,
         version_prefix: str = "/v",
-    ):
+    ) -> BlueprintGroup:
         """
         Create a list of blueprints, optionally grouping them under a
         general URL prefix.
@@ -196,11 +292,15 @@ class Blueprint(BaseSanic):
         opt_version = options.get("version", None)
         opt_strict_slashes = options.get("strict_slashes", None)
         opt_version_prefix = options.get("version_prefix", self.version_prefix)
+        error_format = options.get(
+            "error_format", app.config.FALLBACK_ERROR_FORMAT
+        )
 
         routes = []
         middleware = []
         exception_handlers = []
         listeners = defaultdict(list)
+        registered = set()
 
         # Routes
         for future in self._future_routes:
@@ -227,12 +327,15 @@ class Blueprint(BaseSanic):
             )
 
             name = app._generate_name(future.name)
+            host = future.host or self.host
+            if isinstance(host, list):
+                host = tuple(host)
 
             apply_route = FutureRoute(
                 future.handler,
                 uri[1:] if uri.startswith("//") else uri,
                 future.methods,
-                future.host or self.host,
+                host,
                 strict_slashes,
                 future.stream,
                 version,
@@ -243,8 +346,14 @@ class Blueprint(BaseSanic):
                 future.unquote,
                 future.static,
                 version_prefix,
+                error_format,
+                future.route_context,
             )
 
+            if (self, apply_route) in app._future_registry:
+                continue
+
+            registered.add(apply_route)
             route = app._apply_route(apply_route)
             operation = (
                 routes.extend if isinstance(route, list) else routes.append
@@ -256,39 +365,69 @@ class Blueprint(BaseSanic):
             # Prepend the blueprint URI prefix if available
             uri = url_prefix + future.uri if url_prefix else future.uri
             apply_route = FutureStatic(uri, *future[1:])
+
+            if (self, apply_route) in app._future_registry:
+                continue
+
+            registered.add(apply_route)
             route = app._apply_static(apply_route)
             routes.append(route)
 
         route_names = [route.name for route in routes if route]
 
-        # Middleware
         if route_names:
+            # Middleware
             for future in self._future_middleware:
+                if (self, future) in app._future_registry:
+                    continue
                 middleware.append(app._apply_middleware(future, route_names))
 
-        # Exceptions
-        for future in self._future_exceptions:
-            exception_handlers.append(app._apply_exception_handler(future))
+            # Exceptions
+            for future in self._future_exceptions:
+                if (self, future) in app._future_registry:
+                    continue
+                exception_handlers.append(
+                    app._apply_exception_handler(future, route_names)
+                )
 
         # Event listeners
-        for listener in self._future_listeners:
-            listeners[listener.event].append(app._apply_listener(listener))
+        for future in self._future_listeners:
+            if (self, future) in app._future_registry:
+                continue
+            listeners[future.event].append(app._apply_listener(future))
 
-        for signal in self._future_signals:
-            signal.condition.update({"blueprint": self.name})
-            app._apply_signal(signal)
+        # Signals
+        for future in self._future_signals:
+            if (self, future) in app._future_registry:
+                continue
+            future.condition.update({"__blueprint__": self.name})
+            # Force exclusive to be False
+            app._apply_signal(tuple((*future[:-1], False)))
 
-        self.routes = [route for route in routes if isinstance(route, Route)]
-        self.websocket_routes = [
+        self.routes += [route for route in routes if isinstance(route, Route)]
+        self.websocket_routes += [
             route for route in self.routes if route.ctx.websocket
         ]
-        self.middlewares = middleware
-        self.exceptions = exception_handlers
-        self.listeners = dict(listeners)
+        self.middlewares += middleware
+        self.exceptions += exception_handlers
+        self.listeners.update(dict(listeners))
+
+        if self.registered:
+            self.register_futures(
+                self.apps,
+                self,
+                chain(
+                    registered,
+                    self._future_middleware,
+                    self._future_exceptions,
+                    self._future_listeners,
+                    self._future_signals,
+                ),
+            )
 
     async def dispatch(self, *args, **kwargs):
         condition = kwargs.pop("condition", {})
-        condition.update({"blueprint": self.name})
+        condition.update({"__blueprint__": self.name})
         kwargs["condition"] = condition
         await asyncio.gather(
             *[app.dispatch(*args, **kwargs) for app in self.apps]
@@ -316,3 +455,10 @@ class Blueprint(BaseSanic):
                 value = v
                 break
         return value
+
+    @staticmethod
+    def register_futures(
+        apps: Set[Sanic], bp: Blueprint, futures: Sequence[Tuple[Any, ...]]
+    ):
+        for app in apps:
+            app._future_registry.update(set((bp, item) for item in futures))

sanic/cli/app.py

@@ -0,0 +1,189 @@
+import os
+import shutil
+import sys
+
+from argparse import ArgumentParser, RawTextHelpFormatter
+from importlib import import_module
+from pathlib import Path
+from textwrap import indent
+from typing import Any, List, Union
+
+from sanic.app import Sanic
+from sanic.application.logo import get_logo
+from sanic.cli.arguments import Group
+from sanic.log import error_logger
+from sanic.simple import create_simple_server
+
+
+class SanicArgumentParser(ArgumentParser):
+    ...
+
+
+class SanicCLI:
+    DESCRIPTION = indent(
+        f"""
+{get_logo(True)}
+
+To start running a Sanic application, provide a path to the module, where
+app is a Sanic() instance:
+
+    $ sanic path.to.server:app
+
+Or, a path to a callable that returns a Sanic() instance:
+
+    $ sanic path.to.factory:create_app --factory
+
+Or, a path to a directory to run as a simple HTTP server:
+
+    $ sanic ./path/to/static --simple
+""",
+        prefix=" ",
+    )
+
+    def __init__(self) -> None:
+        width = shutil.get_terminal_size().columns
+        self.parser = SanicArgumentParser(
+            prog="sanic",
+            description=self.DESCRIPTION,
+            formatter_class=lambda prog: RawTextHelpFormatter(
+                prog,
+                max_help_position=36 if width > 96 else 24,
+                indent_increment=4,
+                width=None,
+            ),
+        )
+        self.parser._positionals.title = "Required\n========\n  Positional"
+        self.parser._optionals.title = "Optional\n========\n  General"
+        self.main_process = (
+            os.environ.get("SANIC_RELOADER_PROCESS", "") != "true"
+        )
+        self.args: List[Any] = []
+
+    def attach(self):
+        for group in Group._registry:
+            group.create(self.parser).attach()
+
+    def run(self):
+        # This is to provide backwards compat -v to display version
+        legacy_version = len(sys.argv) == 2 and sys.argv[-1] == "-v"
+        parse_args = ["--version"] if legacy_version else None
+
+        self.args = self.parser.parse_args(args=parse_args)
+        self._precheck()
+
+        try:
+            app = self._get_app()
+            kwargs = self._build_run_kwargs()
+            app.run(**kwargs)
+        except ValueError:
+            error_logger.exception("Failed to run app")
+
+    def _precheck(self):
+        if self.args.debug and self.main_process:
+            error_logger.warning(
+                "Starting in v22.3, --debug will no "
+                "longer automatically run the auto-reloader.\n  Switch to "
+                "--dev to continue using that functionality."
+            )
+
+        # # Custom TLS mismatch handling for better diagnostics
+        if self.main_process and (
+            # one of cert/key missing
+            bool(self.args.cert) != bool(self.args.key)
+            # new and old style self.args used together
+            or self.args.tls
+            and self.args.cert
+            # strict host checking without certs would always fail
+            or self.args.tlshost
+            and not self.args.tls
+            and not self.args.cert
+        ):
+            self.parser.print_usage(sys.stderr)
+            message = (
+                "TLS certificates must be specified by either of:\n"
+                "  --cert certdir/fullchain.pem --key certdir/privkey.pem\n"
+                "  --tls certdir  (equivalent to the above)"
+            )
+            error_logger.error(message)
+            sys.exit(1)
+
+    def _get_app(self):
+        try:
+            module_path = os.path.abspath(os.getcwd())
+            if module_path not in sys.path:
+                sys.path.append(module_path)
+
+            if self.args.simple:
+                path = Path(self.args.module)
+                app = create_simple_server(path)
+            else:
+                delimiter = ":" if ":" in self.args.module else "."
+                module_name, app_name = self.args.module.rsplit(delimiter, 1)
+
+                if app_name.endswith("()"):
+                    self.args.factory = True
+                    app_name = app_name[:-2]
+
+                module = import_module(module_name)
+                app = getattr(module, app_name, None)
+                if self.args.factory:
+                    app = app()
+
+                app_type_name = type(app).__name__
+
+                if not isinstance(app, Sanic):
+                    raise ValueError(
+                        f"Module is not a Sanic app, it is a {app_type_name}\n"
+                        f"  Perhaps you meant {self.args.module}.app?"
+                    )
+        except ImportError as e:
+            if module_name.startswith(e.name):
+                error_logger.error(
+                    f"No module named {e.name} found.\n"
+                    "  Example File: project/sanic_server.py -> app\n"
+                    "  Example Module: project.sanic_server.app"
+                )
+            else:
+                raise e
+        return app
+
+    def _build_run_kwargs(self):
+        ssl: Union[None, dict, str, list] = []
+        if self.args.tlshost:
+            ssl.append(None)
+        if self.args.cert is not None or self.args.key is not None:
+            ssl.append(dict(cert=self.args.cert, key=self.args.key))
+        if self.args.tls:
+            ssl += self.args.tls
+        if not ssl:
+            ssl = None
+        elif len(ssl) == 1 and ssl[0] is not None:
+            # Use only one cert, no TLSSelector.
+            ssl = ssl[0]
+        kwargs = {
+            "access_log": self.args.access_log,
+            "debug": self.args.debug,
+            "fast": self.args.fast,
+            "host": self.args.host,
+            "motd": self.args.motd,
+            "noisy_exceptions": self.args.noisy_exceptions,
+            "port": self.args.port,
+            "ssl": ssl,
+            "unix": self.args.unix,
+            "verbosity": self.args.verbosity or 0,
+            "workers": self.args.workers,
+        }
+
+        if self.args.auto_reload:
+            kwargs["auto_reload"] = True
+
+        if self.args.path:
+            if self.args.auto_reload or self.args.debug:
+                kwargs["reload_dir"] = self.args.path
+            else:
+                error_logger.warning(
+                    "Ignoring '--reload-dir' since auto reloading was not "
+                    "enabled. If you would like to watch directories for "
+                    "changes, consider using --debug or --auto-reload."
+                )
+        return kwargs

sanic/cli/arguments.py

@@ -0,0 +1,237 @@
+from __future__ import annotations
+
+from argparse import ArgumentParser, _ArgumentGroup
+from typing import List, Optional, Type, Union
+
+from sanic_routing import __version__ as __routing_version__  # type: ignore
+
+from sanic import __version__
+
+
+class Group:
+    name: Optional[str]
+    container: Union[ArgumentParser, _ArgumentGroup]
+    _registry: List[Type[Group]] = []
+
+    def __init_subclass__(cls) -> None:
+        Group._registry.append(cls)
+
+    def __init__(self, parser: ArgumentParser, title: Optional[str]):
+        self.parser = parser
+
+        if title:
+            self.container = self.parser.add_argument_group(title=f"  {title}")
+        else:
+            self.container = self.parser
+
+    @classmethod
+    def create(cls, parser: ArgumentParser):
+        instance = cls(parser, cls.name)
+        return instance
+
+    def add_bool_arguments(self, *args, **kwargs):
+        group = self.container.add_mutually_exclusive_group()
+        kwargs["help"] = kwargs["help"].capitalize()
+        group.add_argument(*args, action="store_true", **kwargs)
+        kwargs["help"] = f"no {kwargs['help'].lower()}".capitalize()
+        group.add_argument(
+            "--no-" + args[0][2:], *args[1:], action="store_false", **kwargs
+        )
+
+
+class GeneralGroup(Group):
+    name = None
+
+    def attach(self):
+        self.container.add_argument(
+            "--version",
+            action="version",
+            version=f"Sanic {__version__}; Routing {__routing_version__}",
+        )
+
+        self.container.add_argument(
+            "module",
+            help=(
+                "Path to your Sanic app. Example: path.to.server:app\n"
+                "If running a Simple Server, path to directory to serve. "
+                "Example: ./\n"
+            ),
+        )
+
+
+class ApplicationGroup(Group):
+    name = "Application"
+
+    def attach(self):
+        self.container.add_argument(
+            "--factory",
+            action="store_true",
+            help=(
+                "Treat app as an application factory, "
+                "i.e. a () -> <Sanic app> callable"
+            ),
+        )
+        self.container.add_argument(
+            "-s",
+            "--simple",
+            dest="simple",
+            action="store_true",
+            help=(
+                "Run Sanic as a Simple Server, and serve the contents of "
+                "a directory\n(module arg should be a path)"
+            ),
+        )
+
+
+class SocketGroup(Group):
+    name = "Socket binding"
+
+    def attach(self):
+        self.container.add_argument(
+            "-H",
+            "--host",
+            dest="host",
+            type=str,
+            default="127.0.0.1",
+            help="Host address [default 127.0.0.1]",
+        )
+        self.container.add_argument(
+            "-p",
+            "--port",
+            dest="port",
+            type=int,
+            default=8000,
+            help="Port to serve on [default 8000]",
+        )
+        self.container.add_argument(
+            "-u",
+            "--unix",
+            dest="unix",
+            type=str,
+            default="",
+            help="location of unix socket",
+        )
+
+
+class TLSGroup(Group):
+    name = "TLS certificate"
+
+    def attach(self):
+        self.container.add_argument(
+            "--cert",
+            dest="cert",
+            type=str,
+            help="Location of fullchain.pem, bundle.crt or equivalent",
+        )
+        self.container.add_argument(
+            "--key",
+            dest="key",
+            type=str,
+            help="Location of privkey.pem or equivalent .key file",
+        )
+        self.container.add_argument(
+            "--tls",
+            metavar="DIR",
+            type=str,
+            action="append",
+            help=(
+                "TLS certificate folder with fullchain.pem and privkey.pem\n"
+                "May be specified multiple times to choose multiple "
+                "certificates"
+            ),
+        )
+        self.container.add_argument(
+            "--tls-strict-host",
+            dest="tlshost",
+            action="store_true",
+            help="Only allow clients that send an SNI matching server certs",
+        )
+
+
+class WorkerGroup(Group):
+    name = "Worker"
+
+    def attach(self):
+        group = self.container.add_mutually_exclusive_group()
+        group.add_argument(
+            "-w",
+            "--workers",
+            dest="workers",
+            type=int,
+            default=1,
+            help="Number of worker processes [default 1]",
+        )
+        group.add_argument(
+            "--fast",
+            dest="fast",
+            action="store_true",
+            help="Set the number of workers to max allowed",
+        )
+        self.add_bool_arguments(
+            "--access-logs", dest="access_log", help="display access logs"
+        )
+
+
+class DevelopmentGroup(Group):
+    name = "Development"
+
+    def attach(self):
+        self.container.add_argument(
+            "--debug",
+            dest="debug",
+            action="store_true",
+            help="Run the server in debug mode",
+        )
+        self.container.add_argument(
+            "-d",
+            "--dev",
+            dest="debug",
+            action="store_true",
+            help=(
+                "Currently is an alias for --debug. But starting in v22.3, \n"
+                "--debug will no longer automatically trigger auto_restart. \n"
+                "However, --dev will continue, effectively making it the \n"
+                "same as debug + auto_reload."
+            ),
+        )
+        self.container.add_argument(
+            "-r",
+            "--reload",
+            "--auto-reload",
+            dest="auto_reload",
+            action="store_true",
+            help=(
+                "Watch source directory for file changes and reload on "
+                "changes"
+            ),
+        )
+        self.container.add_argument(
+            "-R",
+            "--reload-dir",
+            dest="path",
+            action="append",
+            help="Extra directories to watch and reload on changes",
+        )
+
+
+class OutputGroup(Group):
+    name = "Output"
+
+    def attach(self):
+        self.add_bool_arguments(
+            "--motd",
+            dest="motd",
+            default=True,
+            help="Show the startup display",
+        )
+        self.container.add_argument(
+            "-v",
+            "--verbosity",
+            action="count",
+            help="Control logging noise, eg. -vv or --verbosity=2 [default 0]",
+        )
+        self.add_bool_arguments(
+            "--noisy-exceptions",
+            dest="noisy_exceptions",
+            help="Output stack traces for all exceptions",
+        )

sanic/compat.py

@@ -8,6 +8,21 @@ from multidict import CIMultiDict  # type: ignore
 
 
 OS_IS_WINDOWS = os.name == "nt"
+UVLOOP_INSTALLED = False
+
+try:
+    import uvloop  # type: ignore # noqa
+
+    UVLOOP_INSTALLED = True
+except ImportError:
+    pass
+
+
+def enable_windows_color_support():
+    import ctypes
+
+    kernel = ctypes.windll.kernel32
+    kernel.SetConsoleMode(kernel.GetStdHandle(-11), 7)
 
 
 class Header(CIMultiDict):

sanic/config.py

@@ -1,31 +1,34 @@
-from inspect import isclass
+from __future__ import annotations
+
+from inspect import getmembers, isclass, isdatadescriptor
 from os import environ
 from pathlib import Path
-from typing import Any, Dict, Optional, Union
-from warnings import warn
+from typing import Any, Callable, Dict, Optional, Sequence, Union
 
+from sanic.errorpages import DEFAULT_FORMAT, check_error_format
+from sanic.helpers import Default, _default
 from sanic.http import Http
-
-from .utils import load_module_from_file_location, str_to_bool
+from sanic.log import deprecation, error_logger
+from sanic.utils import load_module_from_file_location, str_to_bool
 
 
 SANIC_PREFIX = "SANIC_"
-BASE_LOGO = """
 
-                 Sanic
-         Build Fast. Run Fast.
-
-"""
 
 DEFAULT_CONFIG = {
+    "_FALLBACK_ERROR_FORMAT": _default,
     "ACCESS_LOG": True,
+    "AUTO_EXTEND": True,
+    "AUTO_RELOAD": False,
     "EVENT_AUTOREGISTER": False,
-    "FALLBACK_ERROR_FORMAT": "html",
     "FORWARDED_FOR_HEADER": "X-Forwarded-For",
     "FORWARDED_SECRET": None,
     "GRACEFUL_SHUTDOWN_TIMEOUT": 15.0,  # 15 sec
     "KEEP_ALIVE_TIMEOUT": 5,  # 5 seconds
     "KEEP_ALIVE": True,
+    "MOTD": True,
+    "MOTD_DISPLAY": {},
+    "NOISY_EXCEPTIONS": False,
     "PROXIES_COUNT": None,
     "REAL_IP_HEADER": None,
     "REGISTER": True,
@@ -35,24 +38,39 @@ DEFAULT_CONFIG = {
     "REQUEST_MAX_SIZE": 100000000,  # 100 megabytes
     "REQUEST_TIMEOUT": 60,  # 60 seconds
     "RESPONSE_TIMEOUT": 60,  # 60 seconds
-    "WEBSOCKET_MAX_QUEUE": 32,
+    "USE_UVLOOP": _default,
     "WEBSOCKET_MAX_SIZE": 2 ** 20,  # 1 megabyte
     "WEBSOCKET_PING_INTERVAL": 20,
     "WEBSOCKET_PING_TIMEOUT": 20,
-    "WEBSOCKET_READ_LIMIT": 2 ** 16,
-    "WEBSOCKET_WRITE_LIMIT": 2 ** 16,
 }
 
+# These values will be removed from the Config object in v22.6 and moved
+# to the application state
+DEPRECATED_CONFIG = ("SERVER_RUNNING", "RELOADER_PROCESS", "RELOADED_FILES")
 
-class Config(dict):
+
+class DescriptorMeta(type):
+    def __init__(cls, *_):
+        cls.__setters__ = {name for name, _ in getmembers(cls, cls._is_setter)}
+
+    @staticmethod
+    def _is_setter(member: object):
+        return isdatadescriptor(member) and hasattr(member, "setter")
+
+
+class Config(dict, metaclass=DescriptorMeta):
     ACCESS_LOG: bool
+    AUTO_EXTEND: bool
+    AUTO_RELOAD: bool
     EVENT_AUTOREGISTER: bool
-    FALLBACK_ERROR_FORMAT: str
     FORWARDED_FOR_HEADER: str
     FORWARDED_SECRET: Optional[str]
     GRACEFUL_SHUTDOWN_TIMEOUT: float
     KEEP_ALIVE_TIMEOUT: int
     KEEP_ALIVE: bool
+    NOISY_EXCEPTIONS: bool
+    MOTD: bool
+    MOTD_DISPLAY: Dict[str, str]
     PROXIES_COUNT: Optional[int]
     REAL_IP_HEADER: Optional[str]
     REGISTER: bool
@@ -62,24 +80,29 @@ class Config(dict):
     REQUEST_MAX_SIZE: int
     REQUEST_TIMEOUT: int
     RESPONSE_TIMEOUT: int
-    WEBSOCKET_MAX_QUEUE: int
+    SERVER_NAME: str
+    USE_UVLOOP: Union[Default, bool]
     WEBSOCKET_MAX_SIZE: int
     WEBSOCKET_PING_INTERVAL: int
     WEBSOCKET_PING_TIMEOUT: int
-    WEBSOCKET_READ_LIMIT: int
-    WEBSOCKET_WRITE_LIMIT: int
 
     def __init__(
         self,
         defaults: Dict[str, Union[str, bool, int, float, None]] = None,
-        load_env: Optional[Union[bool, str]] = True,
         env_prefix: Optional[str] = SANIC_PREFIX,
         keep_alive: Optional[bool] = None,
+        *,
+        converters: Optional[Sequence[Callable[[str], Any]]] = None,
     ):
         defaults = defaults or {}
         super().__init__({**DEFAULT_CONFIG, **defaults})
 
-        self.LOGO = BASE_LOGO
+        self._converters = [str, str_to_bool, float, int]
+        self._LOGO = ""
+
+        if converters:
+            for converter in converters:
+                self.register_type(converter)
 
         if keep_alive is not None:
             self.KEEP_ALIVE = keep_alive
@@ -87,19 +110,12 @@ class Config(dict):
         if env_prefix != SANIC_PREFIX:
             if env_prefix:
                 self.load_environment_vars(env_prefix)
-        elif load_env is not True:
-            if load_env:
-                self.load_environment_vars(prefix=load_env)
-            warn(
-                "Use of load_env is deprecated and will be removed in "
-                "21.12. Modify the configuration prefix by passing "
-                "env_prefix instead.",
-                DeprecationWarning,
-            )
         else:
             self.load_environment_vars(SANIC_PREFIX)
 
         self._configure_header_size()
+        self._check_error_format()
+        self._init = True
 
     def __getattr__(self, attr):
         try:
@@ -107,14 +123,68 @@ class Config(dict):
         except KeyError as ke:
             raise AttributeError(f"Config has no '{ke.args[0]}'")
 
-    def __setattr__(self, attr, value):
-        self[attr] = value
-        if attr in (
-            "REQUEST_MAX_HEADER_SIZE",
-            "REQUEST_BUFFER_SIZE",
-            "REQUEST_MAX_SIZE",
+    def __setattr__(self, attr, value) -> None:
+        self.update({attr: value})
+
+    def __setitem__(self, attr, value) -> None:
+        self.update({attr: value})
+
+    def update(self, *other, **kwargs) -> None:
+        kwargs.update({k: v for item in other for k, v in dict(item).items()})
+        setters: Dict[str, Any] = {
+            k: kwargs.pop(k)
+            for k in {**kwargs}.keys()
+            if k in self.__class__.__setters__
+        }
+
+        for key, value in setters.items():
+            try:
+                super().__setattr__(key, value)
+            except AttributeError:
+                ...
+
+        super().update(**kwargs)
+        for attr, value in {**setters, **kwargs}.items():
+            self._post_set(attr, value)
+
+    def _post_set(self, attr, value) -> None:
+        if self.get("_init"):
+            if attr in (
+                "REQUEST_MAX_HEADER_SIZE",
+                "REQUEST_BUFFER_SIZE",
+                "REQUEST_MAX_SIZE",
+            ):
+                self._configure_header_size()
+            elif attr == "LOGO":
+                self._LOGO = value
+                deprecation(
+                    "Setting the config.LOGO is deprecated and will no longer "
+                    "be supported starting in v22.6.",
+                    22.6,
+                )
+
+    @property
+    def LOGO(self):
+        return self._LOGO
+
+    @property
+    def FALLBACK_ERROR_FORMAT(self) -> str:
+        if self._FALLBACK_ERROR_FORMAT is _default:
+            return DEFAULT_FORMAT
+        return self._FALLBACK_ERROR_FORMAT
+
+    @FALLBACK_ERROR_FORMAT.setter
+    def FALLBACK_ERROR_FORMAT(self, value):
+        self._check_error_format(value)
+        if (
+            self._FALLBACK_ERROR_FORMAT is not _default
+            and value != self._FALLBACK_ERROR_FORMAT
         ):
-            self._configure_header_size()
+            error_logger.warning(
+                "Setting config.FALLBACK_ERROR_FORMAT on an already "
+                "configured value may have unintended consequences."
+            )
+        self._FALLBACK_ERROR_FORMAT = value
 
     def _configure_header_size(self):
         Http.set_header_max_size(
@@ -123,33 +193,51 @@ class Config(dict):
             self.REQUEST_MAX_SIZE,
         )
 
+    def _check_error_format(self, format: Optional[str] = None):
+        check_error_format(format or self.FALLBACK_ERROR_FORMAT)
+
     def load_environment_vars(self, prefix=SANIC_PREFIX):
         """
-        Looks for prefixed environment variables and applies
-        them to the configuration if present. This is called automatically when
-        Sanic starts up to load environment variables into config.
+        Looks for prefixed environment variables and applies them to the
+        configuration if present. This is called automatically when Sanic
+        starts up to load environment variables into config.
 
-        It will automatically hyrdate the following types:
+        It will automatically hydrate the following types:
 
         - ``int``
         - ``float``
         - ``bool``
 
-        Anything else will be imported as a ``str``.
+        Anything else will be imported as a ``str``. If you would like to add
+        additional types to this list, you can use
+        :meth:`sanic.config.Config.register_type`. Just make sure that they
+        are registered before you instantiate your application.
+
+        .. code-block:: python
+
+            class Foo:
+                def __init__(self, name) -> None:
+                    self.name = name
+
+
+            config = Config(converters=[Foo])
+            app = Sanic(__name__, config=config)
+
+        `See user guide re: config
+        <https://sanicframework.org/guide/deployment/configuration.html>`__
         """
-        for k, v in environ.items():
-            if k.startswith(prefix):
-                _, config_key = k.split(prefix, 1)
+        for key, value in environ.items():
+            if not key.startswith(prefix):
+                continue
+
+            _, config_key = key.split(prefix, 1)
+
+            for converter in reversed(self._converters):
                 try:
-                    self[config_key] = int(v)
+                    self[config_key] = converter(value)
+                    break
                 except ValueError:
-                    try:
-                        self[config_key] = float(v)
-                    except ValueError:
-                        try:
-                            self[config_key] = str_to_bool(v)
-                        except ValueError:
-                            self[config_key] = v
+                    pass
 
     def update_config(self, config: Union[bytes, str, dict, Any]):
         """
@@ -219,3 +307,17 @@ class Config(dict):
         self.update(config)
 
     load = update_config
+
+    def register_type(self, converter: Callable[[str], Any]) -> None:
+        """
+        Allows for adding custom function to cast from a string value to any
+        other type. The function should raise ValueError if it is not the
+        correct type.
+        """
+        if converter in self._converters:
+            error_logger.warning(
+                f"Configuration value converter '{converter.__name__}' has "
+                "already been registered"
+            )
+            return
+        self._converters.append(converter)

sanic/errorpages.py

@@ -25,14 +25,16 @@ from sanic.request import Request
 from sanic.response import HTTPResponse, html, json, text
 
 
+dumps: t.Callable[..., str]
 try:
     from ujson import dumps
 
     dumps = partial(dumps, escape_forward_slashes=False)
 except ImportError:  # noqa
-    from json import dumps  # type: ignore
+    from json import dumps
 
 
+DEFAULT_FORMAT = "auto"
 FALLBACK_TEXT = (
     "The server encountered an internal error and "
     "cannot complete your request."
@@ -45,6 +47,8 @@ class BaseRenderer:
     Base class that all renderers must inherit from.
     """
 
+    dumps = staticmethod(dumps)
+
     def __init__(self, request, exception, debug):
         self.request = request
         self.exception = exception
@@ -112,14 +116,16 @@ class HTMLRenderer(BaseRenderer):
     TRACEBACK_STYLE = """
         html { font-family: sans-serif }
         h2 { color: #888; }
-        .tb-wrapper p { margin: 0 }
+        .tb-wrapper p, dl, dd { margin: 0 }
         .frame-border { margin: 1rem }
-        .frame-line > * { padding: 0.3rem 0.6rem }
-        .frame-line { margin-bottom: 0.3rem }
-        .frame-code { font-size: 16px; padding-left: 4ch }
-        .tb-wrapper { border: 1px solid #eee }
-        .tb-header { background: #eee; padding: 0.3rem; font-weight: bold }
-        .frame-descriptor { background: #e2eafb; font-size: 14px }
+        .frame-line > *, dt, dd { padding: 0.3rem 0.6rem }
+        .frame-line, dl { margin-bottom: 0.3rem }
+        .frame-code, dd { font-size: 16px; padding-left: 4ch }
+        .tb-wrapper, dl { border: 1px solid #eee }
+        .tb-header,.obj-header {
+            background: #eee; padding: 0.3rem; font-weight: bold
+        }
+        .frame-descriptor, dt { background: #e2eafb; font-size: 14px }
     """
     TRACEBACK_WRAPPER_HTML = (
         "<div class=tb-header>{exc_name}: {exc_value}</div>"
@@ -138,6 +144,11 @@ class HTMLRenderer(BaseRenderer):
         "<p class=frame-code><code>{0.line}</code>"
         "</div>"
     )
+    OBJECT_WRAPPER_HTML = (
+        "<div class=obj-header>{title}</div>"
+        "<dl class={obj_type}>{display_html}</dl>"
+    )
+    OBJECT_DISPLAY_HTML = "<dt>{key}</dt><dd><code>{value}</code></dd>"
     OUTPUT_HTML = (
         "<!DOCTYPE html><html lang=en>"
         "<meta charset=UTF-8><title>{title}</title>\n"
@@ -152,7 +163,7 @@ class HTMLRenderer(BaseRenderer):
                 title=self.title,
                 text=self.text,
                 style=self.TRACEBACK_STYLE,
-                body=self._generate_body(),
+                body=self._generate_body(full=True),
             ),
             status=self.status,
         )
@@ -163,7 +174,7 @@ class HTMLRenderer(BaseRenderer):
                 title=self.title,
                 text=self.text,
                 style=self.TRACEBACK_STYLE,
-                body="",
+                body=self._generate_body(full=False),
             ),
             status=self.status,
             headers=self.headers,
@@ -177,27 +188,49 @@ class HTMLRenderer(BaseRenderer):
     def title(self):
         return escape(f"⚠️ {super().title}")
 
-    def _generate_body(self):
-        _, exc_value, __ = sys.exc_info()
-        exceptions = []
-        while exc_value:
-            exceptions.append(self._format_exc(exc_value))
-            exc_value = exc_value.__cause__
+    def _generate_body(self, *, full):
+        lines = []
+        if full:
+            _, exc_value, __ = sys.exc_info()
+            exceptions = []
+            while exc_value:
+                exceptions.append(self._format_exc(exc_value))
+                exc_value = exc_value.__cause__
+
+            traceback_html = self.TRACEBACK_BORDER.join(reversed(exceptions))
+            appname = escape(self.request.app.name)
+            name = escape(self.exception.__class__.__name__)
+            value = escape(self.exception)
+            path = escape(self.request.path)
+            lines += [
+                f"<h2>Traceback of {appname} " "(most recent call last):</h2>",
+                f"{traceback_html}",
+                "<div class=summary><p>",
+                f"<b>{name}: {value}</b> "
+                f"while handling path <code>{path}</code>",
+                "</div>",
+            ]
+
+        for attr, display in (("context", True), ("extra", bool(full))):
+            info = getattr(self.exception, attr, None)
+            if info and display:
+                lines.append(self._generate_object_display(info, attr))
 
-        traceback_html = self.TRACEBACK_BORDER.join(reversed(exceptions))
-        appname = escape(self.request.app.name)
-        name = escape(self.exception.__class__.__name__)
-        value = escape(self.exception)
-        path = escape(self.request.path)
-        lines = [
-            f"<h2>Traceback of {appname} (most recent call last):</h2>",
-            f"{traceback_html}",
-            "<div class=summary><p>",
-            f"<b>{name}: {value}</b> while handling path <code>{path}</code>",
-            "</div>",
-        ]
         return "\n".join(lines)
 
+    def _generate_object_display(
+        self, obj: t.Dict[str, t.Any], descriptor: str
+    ) -> str:
+        display = "".join(
+            self.OBJECT_DISPLAY_HTML.format(key=key, value=value)
+            for key, value in obj.items()
+        )
+        return self.OBJECT_WRAPPER_HTML.format(
+            title=descriptor.title(),
+            display_html=display,
+            obj_type=descriptor.lower(),
+        )
+
     def _format_exc(self, exc):
         frames = extract_tb(exc.__traceback__)
         frame_html = "".join(
@@ -224,7 +257,7 @@ class TextRenderer(BaseRenderer):
                 title=self.title,
                 text=self.text,
                 bar=("=" * len(self.title)),
-                body=self._generate_body(),
+                body=self._generate_body(full=True),
             ),
             status=self.status,
         )
@@ -235,7 +268,7 @@ class TextRenderer(BaseRenderer):
                 title=self.title,
                 text=self.text,
                 bar=("=" * len(self.title)),
-                body="",
+                body=self._generate_body(full=False),
             ),
             status=self.status,
             headers=self.headers,
@@ -245,21 +278,31 @@ class TextRenderer(BaseRenderer):
     def title(self):
         return f"⚠️ {super().title}"
 
-    def _generate_body(self):
-        _, exc_value, __ = sys.exc_info()
-        exceptions = []
+    def _generate_body(self, *, full):
+        lines = []
+        if full:
+            _, exc_value, __ = sys.exc_info()
+            exceptions = []
 
-        lines = [
-            f"{self.exception.__class__.__name__}: {self.exception} while "
-            f"handling path {self.request.path}",
-            f"Traceback of {self.request.app.name} (most recent call last):\n",
-        ]
+            lines += [
+                f"{self.exception.__class__.__name__}: {self.exception} while "
+                f"handling path {self.request.path}",
+                f"Traceback of {self.request.app.name} "
+                "(most recent call last):\n",
+            ]
 
-        while exc_value:
-            exceptions.append(self._format_exc(exc_value))
-            exc_value = exc_value.__cause__
+            while exc_value:
+                exceptions.append(self._format_exc(exc_value))
+                exc_value = exc_value.__cause__
 
-        return "\n".join(lines + exceptions[::-1])
+            lines += exceptions[::-1]
+
+        for attr, display in (("context", True), ("extra", bool(full))):
+            info = getattr(self.exception, attr, None)
+            if info and display:
+                lines += self._generate_object_display_list(info, attr)
+
+        return "\n".join(lines)
 
     def _format_exc(self, exc):
         frames = "\n\n".join(
@@ -272,6 +315,13 @@ class TextRenderer(BaseRenderer):
         )
         return f"{self.SPACER}{exc.__class__.__name__}: {exc}\n{frames}"
 
+    def _generate_object_display_list(self, obj, descriptor):
+        lines = [f"\n{descriptor.title()}"]
+        for key, value in obj.items():
+            display = self.dumps(value)
+            lines.append(f"{self.SPACER * 2}{key}: {display}")
+        return lines
+
 
 class JSONRenderer(BaseRenderer):
     """
@@ -280,11 +330,11 @@ class JSONRenderer(BaseRenderer):
 
     def full(self) -> HTTPResponse:
         output = self._generate_output(full=True)
-        return json(output, status=self.status, dumps=dumps)
+        return json(output, status=self.status, dumps=self.dumps)
 
     def minimal(self) -> HTTPResponse:
         output = self._generate_output(full=False)
-        return json(output, status=self.status, dumps=dumps)
+        return json(output, status=self.status, dumps=self.dumps)
 
     def _generate_output(self, *, full):
         output = {
@@ -293,6 +343,11 @@ class JSONRenderer(BaseRenderer):
             "message": self.text,
         }
 
+        for attr, display in (("context", True), ("extra", bool(full))):
+            info = getattr(self.exception, attr, None)
+            if info and display:
+                output[attr] = info
+
         if full:
             _, exc_value, __ = sys.exc_info()
             exceptions = []
@@ -340,41 +395,139 @@ RENDERERS_BY_CONFIG = {
 }
 
 RENDERERS_BY_CONTENT_TYPE = {
-    "multipart/form-data": HTMLRenderer,
-    "application/json": JSONRenderer,
     "text/plain": TextRenderer,
+    "application/json": JSONRenderer,
+    "multipart/form-data": HTMLRenderer,
+    "text/html": HTMLRenderer,
 }
+CONTENT_TYPE_BY_RENDERERS = {
+    v: k for k, v in RENDERERS_BY_CONTENT_TYPE.items()
+}
+
+RESPONSE_MAPPING = {
+    "empty": "html",
+    "json": "json",
+    "text": "text",
+    "raw": "text",
+    "html": "html",
+    "file": "html",
+    "file_stream": "text",
+    "stream": "text",
+    "redirect": "html",
+    "text/plain": "text",
+    "text/html": "html",
+    "application/json": "json",
+}
+
+
+def check_error_format(format):
+    if format not in RENDERERS_BY_CONFIG and format != "auto":
+        raise SanicException(f"Unknown format: {format}")
 
 
 def exception_response(
     request: Request,
     exception: Exception,
     debug: bool,
+    fallback: str,
+    base: t.Type[BaseRenderer],
     renderer: t.Type[t.Optional[BaseRenderer]] = None,
 ) -> HTTPResponse:
     """
     Render a response for the default FALLBACK exception handler.
     """
+    content_type = None
 
     if not renderer:
-        renderer = HTMLRenderer
+        # Make sure we have something set
+        renderer = base
+        render_format = fallback
 
         if request:
-            if request.app.config.FALLBACK_ERROR_FORMAT == "auto":
+            # If there is a request, try and get the format
+            # from the route
+            if request.route:
                 try:
-                    renderer = JSONRenderer if request.json else HTMLRenderer
-                except InvalidUsage:
+                    if request.route.ctx.error_format:
+                        render_format = request.route.ctx.error_format
+                except AttributeError:
+                    ...
+
+            content_type = request.headers.getone("content-type", "").split(
+                ";"
+            )[0]
+
+            acceptable = request.accept
+
+            # If the format is auto still, make a guess
+            if render_format == "auto":
+                # First, if there is an Accept header, check if text/html
+                # is the first option
+                # According to MDN Web Docs, all major browsers use text/html
+                # as the primary value in Accept (with the exception of IE 8,
+                # and, well, if you are supporting IE 8, then you have bigger
+                # problems to concern yourself with than what default exception
+                # renderer is used)
+                # Source:
+                # https://developer.mozilla.org/en-US/docs/Web/HTTP/Content_negotiation/List_of_default_Accept_values
+
+                if acceptable and acceptable[0].match(
+                    "text/html",
+                    allow_type_wildcard=False,
+                    allow_subtype_wildcard=False,
+                ):
                     renderer = HTMLRenderer
 
-                content_type, *_ = request.headers.getone(
-                    "content-type", ""
-                ).split(";")
-                renderer = RENDERERS_BY_CONTENT_TYPE.get(
-                    content_type, renderer
-                )
+                # Second, if there is an Accept header, check if
+                # application/json is an option, or if the content-type
+                # is application/json
+                elif (
+                    acceptable
+                    and acceptable.match(
+                        "application/json",
+                        allow_type_wildcard=False,
+                        allow_subtype_wildcard=False,
+                    )
+                    or content_type == "application/json"
+                ):
+                    renderer = JSONRenderer
+
+                # Third, if there is no Accept header, assume we want text.
+                # The likely use case here is a raw socket.
+                elif not acceptable:
+                    renderer = TextRenderer
+                else:
+                    # Fourth, look to see if there was a JSON body
+                    # When in this situation, the request is probably coming
+                    # from curl, an API client like Postman or Insomnia, or a
+                    # package like requests or httpx
+                    try:
+                        # Give them the benefit of the doubt if they did:
+                        # $ curl localhost:8000 -d '{"foo": "bar"}'
+                        # And provide them with JSONRenderer
+                        renderer = JSONRenderer if request.json else base
+                    except InvalidUsage:
+                        renderer = base
             else:
-                render_format = request.app.config.FALLBACK_ERROR_FORMAT
                 renderer = RENDERERS_BY_CONFIG.get(render_format, renderer)
 
+            # Lastly, if there is an Accept header, make sure
+            # our choice is okay
+            if acceptable:
+                type_ = CONTENT_TYPE_BY_RENDERERS.get(renderer)  # type: ignore
+                if type_ and type_ not in acceptable:
+                    # If the renderer selected is not in the Accept header
+                    # look through what is in the Accept header, and select
+                    # the first option that matches. Otherwise, just drop back
+                    # to the original default
+                    for accept in acceptable:
+                        mtype = f"{accept.type_}/{accept.subtype}"
+                        maybe = RENDERERS_BY_CONTENT_TYPE.get(mtype)
+                        if maybe:
+                            renderer = maybe
+                            break
+                    else:
+                        renderer = base
+
     renderer = t.cast(t.Type[BaseRenderer], renderer)
     return renderer(request, exception, debug).render()

sanic/exceptions.py

@@ -1,19 +1,27 @@
-from typing import Optional, Union
+from typing import Any, Dict, Optional, Union
 
 from sanic.helpers import STATUS_CODES
 
 
 class SanicException(Exception):
+    message: str = ""
+
     def __init__(
         self,
         message: Optional[Union[str, bytes]] = None,
         status_code: Optional[int] = None,
         quiet: Optional[bool] = None,
+        context: Optional[Dict[str, Any]] = None,
+        extra: Optional[Dict[str, Any]] = None,
     ) -> None:
-
-        if message is None and status_code is not None:
-            msg: bytes = STATUS_CODES.get(status_code, b"")
-            message = msg.decode("utf8")
+        self.context = context
+        self.extra = extra
+        if message is None:
+            if self.message:
+                message = self.message
+            elif status_code is not None:
+                msg: bytes = STATUS_CODES.get(status_code, b"")
+                message = msg.decode("utf8")
 
         super().__init__(message)
 
@@ -122,8 +130,11 @@ class HeaderNotFound(InvalidUsage):
     **Status**: 400 Bad Request
     """
 
-    status_code = 400
-    quiet = True
+
+class InvalidHeader(InvalidUsage):
+    """
+    **Status**: 400 Bad Request
+    """
 
 
 class ContentRangeError(SanicException):
@@ -230,23 +241,6 @@ class InvalidSignal(SanicException):
     pass
 
 
-def abort(status_code: int, message: Optional[Union[str, bytes]] = None):
-    """
-    Raise an exception based on SanicException. Returns the HTTP response
-    message appropriate for the given status code, unless provided.
-
-    STATUS_CODES from sanic.helpers for the given status code.
-
-    :param status_code: The HTTP status code to return.
-    :param message: The HTTP response body. Defaults to the messages in
-    """
-    import warnings
-
-    warnings.warn(
-        "sanic.exceptions.abort has been marked as deprecated, and will be "
-        "removed in release 21.12.\n To migrate your code, simply replace "
-        "abort(status_code, msg) with raise SanicException(msg, status_code), "
-        "or even better, raise an appropriate SanicException subclass."
-    )
-
-    raise SanicException(message=message, status_code=status_code)
+class WebsocketClosed(SanicException):
+    quiet = True
+    message = "Client has closed the websocket connection"

sanic/handlers.py

@@ -1,12 +1,24 @@
-from traceback import format_exc
+from __future__ import annotations
 
-from sanic.errorpages import exception_response
+from inspect import signature
+from typing import Dict, List, Optional, Tuple, Type, Union
+
+from sanic.config import Config
+from sanic.errorpages import (
+    DEFAULT_FORMAT,
+    BaseRenderer,
+    HTMLRenderer,
+    exception_response,
+)
 from sanic.exceptions import (
     ContentRangeError,
     HeaderNotFound,
     InvalidRangeType,
+    SanicException,
 )
-from sanic.log import error_logger
+from sanic.helpers import Default, _default
+from sanic.log import deprecation, error_logger
+from sanic.models.handler_types import RouteHandler
 from sanic.response import text
 
 
@@ -23,15 +35,121 @@ class ErrorHandler:
 
     """
 
-    handlers = None
-    cached_handlers = None
-
-    def __init__(self):
-        self.handlers = []
-        self.cached_handlers = {}
+    # Beginning in v22.3, the base renderer will be TextRenderer
+    def __init__(
+        self,
+        fallback: Union[str, Default] = _default,
+        base: Type[BaseRenderer] = HTMLRenderer,
+    ):
+        self.handlers: List[Tuple[Type[BaseException], RouteHandler]] = []
+        self.cached_handlers: Dict[
+            Tuple[Type[BaseException], Optional[str]], Optional[RouteHandler]
+        ] = {}
         self.debug = False
+        self._fallback = fallback
+        self.base = base
 
-    def add(self, exception, handler):
+        if fallback is not _default:
+            self._warn_fallback_deprecation()
+
+    @property
+    def fallback(self):
+        # This is for backwards compat and can be removed in v22.6
+        if self._fallback is _default:
+            return DEFAULT_FORMAT
+        return self._fallback
+
+    @fallback.setter
+    def fallback(self, value: str):
+        self._warn_fallback_deprecation()
+        if not isinstance(value, str):
+            raise SanicException(
+                f"Cannot set error handler fallback to: value={value}"
+            )
+        self._fallback = value
+
+    @staticmethod
+    def _warn_fallback_deprecation():
+        deprecation(
+            "Setting the ErrorHandler fallback value directly is "
+            "deprecated and no longer supported. This feature will "
+            "be removed in v22.6. Instead, use "
+            "app.config.FALLBACK_ERROR_FORMAT.",
+            22.6,
+        )
+
+    @classmethod
+    def _get_fallback_value(cls, error_handler: ErrorHandler, config: Config):
+        if error_handler._fallback is not _default:
+            if config._FALLBACK_ERROR_FORMAT is _default:
+                return error_handler.fallback
+
+            error_logger.warning(
+                "Conflicting error fallback values were found in the "
+                "error handler and in the app.config while handling an "
+                "exception. Using the value from app.config."
+            )
+        return config.FALLBACK_ERROR_FORMAT
+
+    @classmethod
+    def finalize(
+        cls,
+        error_handler: ErrorHandler,
+        fallback: Optional[str] = None,
+        config: Optional[Config] = None,
+    ):
+        if fallback:
+            deprecation(
+                "Setting the ErrorHandler fallback value via finalize() "
+                "is deprecated and no longer supported. This feature will "
+                "be removed in v22.6. Instead, use "
+                "app.config.FALLBACK_ERROR_FORMAT.",
+                22.6,
+            )
+
+        if config is None:
+            deprecation(
+                "Starting in v22.3, config will be a required argument "
+                "for ErrorHandler.finalize().",
+                22.3,
+            )
+
+        if fallback and fallback != DEFAULT_FORMAT:
+            if error_handler._fallback is not _default:
+                error_logger.warning(
+                    f"Setting the fallback value to {fallback}. This changes "
+                    "the current non-default value "
+                    f"'{error_handler._fallback}'."
+                )
+            error_handler._fallback = fallback
+
+        if not isinstance(error_handler, cls):
+            error_logger.warning(
+                f"Error handler is non-conforming: {type(error_handler)}"
+            )
+
+        sig = signature(error_handler.lookup)
+        if len(sig.parameters) == 1:
+            deprecation(
+                "You are using a deprecated error handler. The lookup "
+                "method should accept two positional parameters: "
+                "(exception, route_name: Optional[str]). "
+                "Until you upgrade your ErrorHandler.lookup, Blueprint "
+                "specific exceptions will not work properly. Beginning "
+                "in v22.3, the legacy style lookup method will not "
+                "work at all.",
+                22.3,
+            )
+            legacy_lookup = error_handler._legacy_lookup
+            error_handler._lookup = legacy_lookup  # type: ignore
+
+    def _full_lookup(self, exception, route_name: Optional[str] = None):
+        return self.lookup(exception, route_name)
+
+    def _legacy_lookup(self, exception, route_name: Optional[str] = None):
+        return self.lookup(exception)
+
+    def add(self, exception, handler, route_names: Optional[List[str]] = None):
         """
         Add a new exception handler to an already existing handler object.
 
@@ -44,11 +162,16 @@ class ErrorHandler:
 
         :return: None
         """
-        # self.handlers to be deprecated and removed in version 21.12
+        # self.handlers is deprecated and will be removed in version 22.3
         self.handlers.append((exception, handler))
-        self.cached_handlers[exception] = handler
 
-    def lookup(self, exception):
+        if route_names:
+            for route in route_names:
+                self.cached_handlers[(exception, route)] = handler
+        else:
+            self.cached_handlers[(exception, None)] = handler
+
+    def lookup(self, exception, route_name: Optional[str] = None):
         """
         Lookup the existing instance of :class:`ErrorHandler` and fetch the
         registered handler for a specific type of exception.
@@ -63,20 +186,31 @@ class ErrorHandler:
         :return: Registered function if found ``None`` otherwise
         """
         exception_class = type(exception)
-        if exception_class in self.cached_handlers:
-            return self.cached_handlers[exception_class]
 
-        for ancestor in type.mro(exception_class):
-            if ancestor in self.cached_handlers:
-                handler = self.cached_handlers[ancestor]
-                self.cached_handlers[exception_class] = handler
+        for name in (route_name, None):
+            exception_key = (exception_class, name)
+            handler = self.cached_handlers.get(exception_key)
+            if handler:
                 return handler
-            if ancestor is BaseException:
-                break
-        self.cached_handlers[exception_class] = None
+
+        for name in (route_name, None):
+            for ancestor in type.mro(exception_class):
+                exception_key = (ancestor, name)
+                if exception_key in self.cached_handlers:
+                    handler = self.cached_handlers[exception_key]
+                    self.cached_handlers[
+                        (exception_class, route_name)
+                    ] = handler
+                    return handler
+
+                if ancestor is BaseException:
+                    break
+        self.cached_handlers[(exception_class, route_name)] = None
         handler = None
         return handler
 
+    _lookup = _full_lookup
+
     def response(self, request, exception):
         """Fetches and executes an exception handler and returns a response
         object
@@ -91,7 +225,8 @@ class ErrorHandler:
         :return: Wrap the return value obtained from :func:`default`
             or registered handler for that type of exception.
         """
-        handler = self.lookup(exception)
+        route_name = request.name if request else None
+        handler = self._lookup(exception, route_name)
         response = None
         try:
             if handler:
@@ -99,7 +234,6 @@ class ErrorHandler:
             if response is None:
                 response = self.default(request, exception)
         except Exception:
-            self.log(format_exc())
             try:
                 url = repr(request.url)
             except AttributeError:
@@ -115,11 +249,6 @@ class ErrorHandler:
                 return text("An error occurred while handling an error", 500)
         return response
 
-    def log(self, message, level="error"):
-        """
-        Deprecated, do not use.
-        """
-
     def default(self, request, exception):
         """
         Provide a default behavior for the objects of :class:`ErrorHandler`.
@@ -135,20 +264,30 @@ class ErrorHandler:
             :class:`Exception`
         :return:
         """
+        self.log(request, exception)
+        fallback = ErrorHandler._get_fallback_value(self, request.app.config)
+        return exception_response(
+            request,
+            exception,
+            debug=self.debug,
+            base=self.base,
+            fallback=fallback,
+        )
+
+    @staticmethod
+    def log(request, exception):
         quiet = getattr(exception, "quiet", False)
-        if quiet is False:
+        noisy = getattr(request.app.config, "NOISY_EXCEPTIONS", False)
+        if quiet is False or noisy is True:
             try:
                 url = repr(request.url)
             except AttributeError:
                 url = "unknown"
 
-            self.log(format_exc())
             error_logger.exception(
                 "Exception occurred while handling uri: %s", url
             )
 
-        return exception_response(request, exception, self.debug)
-
 
 class ContentRangeHandler:
     """

sanic/headers.py

@@ -1,8 +1,11 @@
+from __future__ import annotations
+
 import re
 
 from typing import Any, Dict, Iterable, List, Optional, Tuple, Union
 from urllib.parse import unquote
 
+from sanic.exceptions import InvalidHeader
 from sanic.helpers import STATUS_CODES
 
 
@@ -25,11 +28,180 @@ _host_re = re.compile(
 
 # RFC's quoted-pair escapes are mostly ignored by browsers. Chrome, Firefox and
 # curl all have different escaping, that we try to handle as well as possible,
-# even though no client espaces in a way that would allow perfect handling.
+# even though no client escapes in a way that would allow perfect handling.
 
 # For more information, consult ../tests/test_requests.py
 
 
+def parse_arg_as_accept(f):
+    def func(self, other, *args, **kwargs):
+        if not isinstance(other, Accept) and other:
+            other = Accept.parse(other)
+        return f(self, other, *args, **kwargs)
+
+    return func
+
+
+class MediaType(str):
+    def __new__(cls, value: str):
+        return str.__new__(cls, value)
+
+    def __init__(self, value: str) -> None:
+        self.value = value
+        self.is_wildcard = self.check_if_wildcard(value)
+
+    def __eq__(self, other):
+        if self.is_wildcard:
+            return True
+
+        if self.match(other):
+            return True
+
+        other_is_wildcard = (
+            other.is_wildcard
+            if isinstance(other, MediaType)
+            else self.check_if_wildcard(other)
+        )
+
+        return other_is_wildcard
+
+    def match(self, other):
+        other_value = other.value if isinstance(other, MediaType) else other
+        return self.value == other_value
+
+    @staticmethod
+    def check_if_wildcard(value):
+        return value == "*"
+
+
+class Accept(str):
+    def __new__(cls, value: str, *args, **kwargs):
+        return str.__new__(cls, value)
+
+    def __init__(
+        self,
+        value: str,
+        type_: MediaType,
+        subtype: MediaType,
+        *,
+        q: str = "1.0",
+        **kwargs: str,
+    ):
+        qvalue = float(q)
+        if qvalue > 1 or qvalue < 0:
+            raise InvalidHeader(
+                f"Accept header qvalue must be between 0 and 1, not: {qvalue}"
+            )
+        self.value = value
+        self.type_ = type_
+        self.subtype = subtype
+        self.qvalue = qvalue
+        self.params = kwargs
+
+    def _compare(self, other, method):
+        try:
+            return method(self.qvalue, other.qvalue)
+        except (AttributeError, TypeError):
+            return NotImplemented
+
+    @parse_arg_as_accept
+    def __lt__(self, other: Union[str, Accept]):
+        return self._compare(other, lambda s, o: s < o)
+
+    @parse_arg_as_accept
+    def __le__(self, other: Union[str, Accept]):
+        return self._compare(other, lambda s, o: s <= o)
+
+    @parse_arg_as_accept
+    def __eq__(self, other: Union[str, Accept]):  # type: ignore
+        return self._compare(other, lambda s, o: s == o)
+
+    @parse_arg_as_accept
+    def __ge__(self, other: Union[str, Accept]):
+        return self._compare(other, lambda s, o: s >= o)
+
+    @parse_arg_as_accept
+    def __gt__(self, other: Union[str, Accept]):
+        return self._compare(other, lambda s, o: s > o)
+
+    @parse_arg_as_accept
+    def __ne__(self, other: Union[str, Accept]):  # type: ignore
+        return self._compare(other, lambda s, o: s != o)
+
+    @parse_arg_as_accept
+    def match(
+        self,
+        other,
+        *,
+        allow_type_wildcard: bool = True,
+        allow_subtype_wildcard: bool = True,
+    ) -> bool:
+        type_match = (
+            self.type_ == other.type_
+            if allow_type_wildcard
+            else (
+                self.type_.match(other.type_)
+                and not self.type_.is_wildcard
+                and not other.type_.is_wildcard
+            )
+        )
+        subtype_match = (
+            self.subtype == other.subtype
+            if allow_subtype_wildcard
+            else (
+                self.subtype.match(other.subtype)
+                and not self.subtype.is_wildcard
+                and not other.subtype.is_wildcard
+            )
+        )
+
+        return type_match and subtype_match
+
+    @classmethod
+    def parse(cls, raw: str) -> Accept:
+        invalid = False
+        mtype = raw.strip()
+
+        try:
+            media, *raw_params = mtype.split(";")
+            type_, subtype = media.split("/")
+        except ValueError:
+            invalid = True
+
+        if invalid or not type_ or not subtype:
+            raise InvalidHeader(f"Header contains invalid Accept value: {raw}")
+
+        params = dict(
+            [
+                (key.strip(), value.strip())
+                for key, value in (param.split("=", 1) for param in raw_params)
+            ]
+        )
+
+        return cls(mtype, MediaType(type_), MediaType(subtype), **params)
+
+
+class AcceptContainer(list):
+    def __contains__(self, o: object) -> bool:
+        return any(item.match(o) for item in self)
+
+    def match(
+        self,
+        o: object,
+        *,
+        allow_type_wildcard: bool = True,
+        allow_subtype_wildcard: bool = True,
+    ) -> bool:
+        return any(
+            item.match(
+                o,
+                allow_type_wildcard=allow_type_wildcard,
+                allow_subtype_wildcard=allow_subtype_wildcard,
+            )
+            for item in self
+        )
+
+
 def parse_content_header(value: str) -> Tuple[str, Options]:
     """Parse content-type and content-disposition header values.
 
@@ -194,3 +366,31 @@ def format_http1_response(status: int, headers: HeaderBytesIterable) -> bytes:
         ret += b"%b: %b\r\n" % h
     ret += b"\r\n"
     return ret
+
+
+def _sort_accept_value(accept: Accept):
+    return (
+        accept.qvalue,
+        len(accept.params),
+        accept.subtype != "*",
+        accept.type_ != "*",
+    )
+
+
+def parse_accept(accept: str) -> AcceptContainer:
+    """Parse an Accept header and order the acceptable media types in
+    accorsing to RFC 7231, s. 5.3.2
+    https://datatracker.ietf.org/doc/html/rfc7231#section-5.3.2
+    """
+    media_types = accept.split(",")
+    accept_list: List[Accept] = []
+
+    for mtype in media_types:
+        if not mtype:
+            continue
+
+        accept_list.append(Accept.parse(mtype))
+
+    return AcceptContainer(
+        sorted(accept_list, key=_sort_accept_value, reverse=True)
+    )

sanic/helpers.py

@@ -144,7 +144,7 @@ def import_string(module_name, package=None):
     import a module or class by string path.
 
     :module_name: str with path of module or path to import and
-    instanciate a class
+    instantiate a class
     :returns: a module object or one instance from class if
     module_name is a valid path to class
 
@@ -155,3 +155,17 @@ def import_string(module_name, package=None):
     if ismodule(obj):
         return obj
     return obj()
+
+
+class Default:
+    """
+    It is used to replace `None` or `object()` as a sentinel
+    that represents a default value. Sometimes we want to set
+    a value to `None` so we cannot use `None` to represent the
+    default value, and `object()` is hard to be typed.
+    """
+
+    pass
+
+
+_default = Default()

sanic/http.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 from typing import TYPE_CHECKING, Optional
 
 
-if TYPE_CHECKING:
+if TYPE_CHECKING:  # no cov
     from sanic.request import Request
     from sanic.response import BaseHTTPResponse
 
@@ -21,6 +21,7 @@ from sanic.exceptions import (
 from sanic.headers import format_http1_response
 from sanic.helpers import has_message_body
 from sanic.log import access_logger, error_logger, logger
+from sanic.touchup import TouchUpMeta
 
 
 class Stage(Enum):
@@ -45,7 +46,7 @@ class Stage(Enum):
 HTTP_CONTINUE = b"HTTP/1.1 100 Continue\r\n\r\n"
 
 
-class Http:
+class Http(metaclass=TouchUpMeta):
     """
     Internal helper for managing the HTTP request/response cycle
 
@@ -67,9 +68,15 @@ class Http:
     HEADER_CEILING = 16_384
     HEADER_MAX_SIZE = 0
 
+    __touchup__ = (
+        "http1_request_header",
+        "http1_response_header",
+        "read",
+    )
     __slots__ = [
         "_send",
         "_receive_more",
+        "dispatch",
         "recv_buffer",
         "protocol",
         "expecting_continue",
@@ -97,7 +104,7 @@ class Http:
         self.protocol = protocol
         self.keep_alive = True
         self.stage: Stage = Stage.IDLE
-        self.init_for_request()
+        self.dispatch = self.protocol.app.dispatch
 
     def init_for_request(self):
         """Init/reset all per-request variables."""
@@ -121,14 +128,20 @@ class Http:
         """
         HTTP 1.1 connection handler
         """
-        while True:  # As long as connection stays keep-alive
+        # Handle requests while the connection stays reusable
+        while self.keep_alive and self.stage is Stage.IDLE:
+            self.init_for_request()
+            # Wait for incoming bytes (in IDLE stage)
+            if not self.recv_buffer:
+                await self._receive_more()
+            self.stage = Stage.REQUEST
             try:
                 # Receive and handle a request
-                self.stage = Stage.REQUEST
                 self.response_func = self.http1_response_header
 
                 await self.http1_request_header()
 
+                self.stage = Stage.HANDLER
                 self.request.conn_info = self.protocol.conn_info
                 await self.protocol.request_handler(self.request)
 
@@ -140,6 +153,12 @@ class Http:
                     await self.response.send(end_stream=True)
             except CancelledError:
                 # Write an appropriate response before exiting
+                if not self.protocol.transport:
+                    logger.info(
+                        f"Request: {self.request.method} {self.request.url} "
+                        "stopped. Transport is closed."
+                    )
+                    return
                 e = self.exception or ServiceUnavailable("Cancelled")
                 self.exception = None
                 self.keep_alive = False
@@ -173,17 +192,7 @@ class Http:
                 if self.response:
                     self.response.stream = None
 
-            self.init_for_request()
-
-            # Exit and disconnect if no more requests can be taken
-            if self.stage is not Stage.IDLE or not self.keep_alive:
-                break
-
-            # Wait for the next request
-            if not self.recv_buffer:
-                await self._receive_more()
-
-    async def http1_request_header(self):
+    async def http1_request_header(self):  # no cov
         """
         Receive and parse request header into self.request.
         """
@@ -212,6 +221,12 @@ class Http:
             reqline, *split_headers = raw_headers.split("\r\n")
             method, self.url, protocol = reqline.split(" ")
 
+            await self.dispatch(
+                "http.lifecycle.read_head",
+                inline=True,
+                context={"head": bytes(head)},
+            )
+
             if protocol == "HTTP/1.1":
                 self.keep_alive = True
             elif protocol == "HTTP/1.0":
@@ -250,6 +265,11 @@ class Http:
             transport=self.protocol.transport,
             app=self.protocol.app,
         )
+        await self.dispatch(
+            "http.lifecycle.request",
+            inline=True,
+            context={"request": request},
+        )
 
         # Prepare for request body
         self.request_bytes_left = self.request_bytes = 0
@@ -274,13 +294,12 @@ class Http:
 
         # Remove header and its trailing CRLF
         del buf[: pos + 4]
-        self.stage = Stage.HANDLER
         self.request, request.stream = request, self
         self.protocol.state["requests_count"] += 1
 
     async def http1_response_header(
         self, data: bytes, end_stream: bool
-    ) -> None:
+    ) -> None:  # no cov
         res = self.response
 
         # Compatibility with simple response body
@@ -452,8 +471,8 @@ class Http:
             "request": "nil",
         }
         if req is not None:
-            if req.ip:
-                extra["host"] = f"{req.ip}:{req.port}"
+            if req.remote_addr or req.ip:
+                extra["host"] = f"{req.remote_addr or req.ip}:{req.port}"
             extra["request"] = f"{req.method} {req.url}"
         access_logger.info("", extra=extra)
 
@@ -469,7 +488,7 @@ class Http:
             if data:
                 yield data
 
-    async def read(self) -> Optional[bytes]:
+    async def read(self) -> Optional[bytes]:  # no cov
         """
         Read some bytes of request body.
         """
@@ -543,6 +562,12 @@ class Http:
 
         self.request_bytes_left -= size
 
+        await self.dispatch(
+            "http.lifecycle.read_body",
+            inline=True,
+            context={"body": data},
+        )
+
         return data
 
     # Response methods
@@ -559,6 +584,11 @@ class Http:
             self.stage = Stage.FAILED
             raise RuntimeError("Response already started")
 
+        # Disconnect any earlier but unused response object
+        if self.response is not None:
+            self.response.stream = None
+
+        # Connect and return the response
         self.response, response.stream = response, self
         return response
 

sanic/log.py

@@ -1,8 +1,12 @@
 import logging
 import sys
 
+from enum import Enum
+from typing import Any, Dict
+from warnings import warn
 
-LOGGING_CONFIG_DEFAULTS = dict(
+
+LOGGING_CONFIG_DEFAULTS: Dict[str, Any] = dict(
     version=1,
     disable_existing_loggers=False,
     loggers={
@@ -53,6 +57,14 @@ LOGGING_CONFIG_DEFAULTS = dict(
 )
 
 
+class Colors(str, Enum):
+    END = "\033[0m"
+    BLUE = "\033[01;34m"
+    GREEN = "\033[01;32m"
+    YELLOW = "\033[01;33m"
+    RED = "\033[01;31m"
+
+
 logger = logging.getLogger("sanic.root")
 """
 General Sanic logger
@@ -67,3 +79,11 @@ access_logger = logging.getLogger("sanic.access")
 """
 Logger used by Sanic for access logging
 """
+
+
+def deprecation(message: str, version: float):
+    version_info = f"[DEPRECATION v{version}] "
+    if sys.stdout.isatty():
+        version_info = f"{Colors.RED}{version_info}"
+        message = f"{Colors.YELLOW}{message}{Colors.END}"
+    warn(version_info + message, DeprecationWarning)

sanic/mixins/exceptions.py

@@ -1,9 +1,10 @@
 from typing import Set
 
+from sanic.base.meta import SanicMeta
 from sanic.models.futures import FutureException
 
 
-class ExceptionMixin:
+class ExceptionMixin(metaclass=SanicMeta):
     def __init__(self, *args, **kwargs) -> None:
         self._future_exceptions: Set[FutureException] = set()
 

sanic/mixins/listeners.py

@@ -1,23 +1,25 @@
 from enum import Enum, auto
 from functools import partial
-from typing import Any, Callable, Coroutine, List, Optional, Union
+from typing import List, Optional, Union
 
+from sanic.base.meta import SanicMeta
 from sanic.models.futures import FutureListener
+from sanic.models.handler_types import ListenerType, Sanic
 
 
 class ListenerEvent(str, Enum):
     def _generate_next_value_(name: str, *args) -> str:  # type: ignore
         return name.lower()
 
-    BEFORE_SERVER_START = auto()
-    AFTER_SERVER_START = auto()
-    BEFORE_SERVER_STOP = auto()
-    AFTER_SERVER_STOP = auto()
+    BEFORE_SERVER_START = "server.init.before"
+    AFTER_SERVER_START = "server.init.after"
+    BEFORE_SERVER_STOP = "server.shutdown.before"
+    AFTER_SERVER_STOP = "server.shutdown.after"
     MAIN_PROCESS_START = auto()
     MAIN_PROCESS_STOP = auto()
 
 
-class ListenerMixin:
+class ListenerMixin(metaclass=SanicMeta):
     def __init__(self, *args, **kwargs) -> None:
         self._future_listeners: List[FutureListener] = []
 
@@ -26,12 +28,10 @@ class ListenerMixin:
 
     def listener(
         self,
-        listener_or_event: Union[
-            Callable[..., Coroutine[Any, Any, None]], str
-        ],
+        listener_or_event: Union[ListenerType[Sanic], str],
         event_or_none: Optional[str] = None,
         apply: bool = True,
-    ):
+    ) -> ListenerType[Sanic]:
         """
         Create a listener from a decorated function.
 
@@ -63,20 +63,32 @@ class ListenerMixin:
         else:
             return partial(register_listener, event=listener_or_event)
 
-    def main_process_start(self, listener):
+    def main_process_start(
+        self, listener: ListenerType[Sanic]
+    ) -> ListenerType[Sanic]:
         return self.listener(listener, "main_process_start")
 
-    def main_process_stop(self, listener):
+    def main_process_stop(
+        self, listener: ListenerType[Sanic]
+    ) -> ListenerType[Sanic]:
         return self.listener(listener, "main_process_stop")
 
-    def before_server_start(self, listener):
+    def before_server_start(
+        self, listener: ListenerType[Sanic]
+    ) -> ListenerType[Sanic]:
         return self.listener(listener, "before_server_start")
 
-    def after_server_start(self, listener):
+    def after_server_start(
+        self, listener: ListenerType[Sanic]
+    ) -> ListenerType[Sanic]:
         return self.listener(listener, "after_server_start")
 
-    def before_server_stop(self, listener):
+    def before_server_stop(
+        self, listener: ListenerType[Sanic]
+    ) -> ListenerType[Sanic]:
         return self.listener(listener, "before_server_stop")
 
-    def after_server_stop(self, listener):
+    def after_server_stop(
+        self, listener: ListenerType[Sanic]
+    ) -> ListenerType[Sanic]:
         return self.listener(listener, "after_server_stop")

sanic/mixins/middleware.py

@@ -1,10 +1,11 @@
 from functools import partial
 from typing import List
 
+from sanic.base.meta import SanicMeta
 from sanic.models.futures import FutureMiddleware
 
 
-class MiddlewareMixin:
+class MiddlewareMixin(metaclass=SanicMeta):
     def __init__(self, *args, **kwargs) -> None:
         self._future_middleware: List[FutureMiddleware] = []
 

sanic/mixins/routes.py

@@ -1,17 +1,22 @@
+from ast import NodeVisitor, Return, parse
+from contextlib import suppress
 from functools import partial, wraps
-from inspect import signature
+from inspect import getsource, signature
 from mimetypes import guess_type
 from os import path
 from pathlib import PurePath
 from re import sub
+from textwrap import dedent
 from time import gmtime, strftime
-from typing import Iterable, List, Optional, Set, Union
+from typing import Any, Callable, Iterable, List, Optional, Set, Tuple, Union
 from urllib.parse import unquote
 
 from sanic_routing.route import Route  # type: ignore
 
+from sanic.base.meta import SanicMeta
 from sanic.compat import stat_async
 from sanic.constants import DEFAULT_HTTP_CONTENT_TYPE, HTTP_METHODS
+from sanic.errorpages import RESPONSE_MAPPING
 from sanic.exceptions import (
     ContentRangeError,
     FileNotFound,
@@ -19,13 +24,27 @@ from sanic.exceptions import (
     InvalidUsage,
 )
 from sanic.handlers import ContentRangeHandler
-from sanic.log import error_logger
+from sanic.log import deprecation, error_logger
 from sanic.models.futures import FutureRoute, FutureStatic
+from sanic.models.handler_types import RouteHandler
 from sanic.response import HTTPResponse, file, file_stream
-from sanic.views import CompositionView
+from sanic.types import HashableDict
 
 
-class RouteMixin:
+RouteWrapper = Callable[
+    [RouteHandler], Union[RouteHandler, Tuple[Route, RouteHandler]]
+]
+RESTRICTED_ROUTE_CONTEXT = (
+    "ignore_body",
+    "stream",
+    "hosts",
+    "static",
+    "error_format",
+    "websocket",
+)
+
+
+class RouteMixin(metaclass=SanicMeta):
     name: str
 
     def __init__(self, *args, **kwargs) -> None:
@@ -43,7 +62,7 @@ class RouteMixin:
         self,
         uri: str,
         methods: Optional[Iterable[str]] = None,
-        host: Optional[str] = None,
+        host: Optional[Union[str, List[str]]] = None,
         strict_slashes: Optional[bool] = None,
         stream: bool = False,
         version: Optional[Union[int, str, float]] = None,
@@ -55,10 +74,21 @@ class RouteMixin:
         unquote: bool = False,
         static: bool = False,
         version_prefix: str = "/v",
-    ):
+        error_format: Optional[str] = None,
+        **ctx_kwargs: Any,
+    ) -> RouteWrapper:
         """
         Decorate a function to be registered as a route
 
+
+        **Example using context kwargs**
+
+        .. code-block:: python
+
+            @app.route(..., ctx_foo="foobar")
+            async def route_handler(request: Request):
+                assert request.route.ctx.foo == "foobar"
+
         :param uri: path of the URL
         :param methods: list or tuple of methods allowed
         :param host: the host, if required
@@ -70,6 +100,8 @@ class RouteMixin:
             body (eg. GET requests)
         :param version_prefix: URL path that should be before the version
             value; default: ``/v``
+        :param  ctx_kwargs: Keyword arguments that begin with a ctx_* prefix
+            will be appended to the route context (``route.ctx``)
         :return: tuple of routes, decorated function
         """
 
@@ -84,6 +116,8 @@ class RouteMixin:
         if not methods and not websocket:
             methods = frozenset({"GET"})
 
+        route_context = self._build_route_context(ctx_kwargs)
+
         def decorator(handler):
             nonlocal uri
             nonlocal methods
@@ -97,6 +131,7 @@ class RouteMixin:
             nonlocal websocket
             nonlocal static
             nonlocal version_prefix
+            nonlocal error_format
 
             if isinstance(handler, tuple):
                 # if a handler fn is already wrapped in a route, the handler
@@ -115,10 +150,16 @@ class RouteMixin:
                         "Expected either string or Iterable of host strings, "
                         "not %s" % host
                     )
-
-            if isinstance(subprotocols, (list, tuple, set)):
+            if isinstance(subprotocols, list):
+                # Ordered subprotocols, maintain order
+                subprotocols = tuple(subprotocols)
+            elif isinstance(subprotocols, set):
+                # subprotocol is unordered, keep it unordered
                 subprotocols = frozenset(subprotocols)
 
+            if not error_format or error_format == "auto":
+                error_format = self._determine_error_format(handler)
+
             route = FutureRoute(
                 handler,
                 uri,
@@ -134,6 +175,8 @@ class RouteMixin:
                 unquote,
                 static,
                 version_prefix,
+                error_format,
+                route_context,
             )
 
             self._future_routes.add(route)
@@ -168,16 +211,18 @@ class RouteMixin:
 
     def add_route(
         self,
-        handler,
+        handler: RouteHandler,
         uri: str,
         methods: Iterable[str] = frozenset({"GET"}),
-        host: Optional[str] = None,
+        host: Optional[Union[str, List[str]]] = None,
         strict_slashes: Optional[bool] = None,
-        version: Optional[int] = None,
+        version: Optional[Union[int, str, float]] = None,
         name: Optional[str] = None,
         stream: bool = False,
         version_prefix: str = "/v",
-    ):
+        error_format: Optional[str] = None,
+        **ctx_kwargs,
+    ) -> RouteHandler:
         """A helper method to register class instance or
         functions as a handler to the application url
         routes.
@@ -193,6 +238,8 @@ class RouteMixin:
         :param stream: boolean specifying if the handler is a stream handler
         :param version_prefix: URL path that should be before the version
             value; default: ``/v``
+        :param  ctx_kwargs: Keyword arguments that begin with a ctx_* prefix
+            will be appended to the route context (``route.ctx``)
         :return: function or class instance
         """
         # Handle HTTPMethodView differently
@@ -200,20 +247,13 @@ class RouteMixin:
             methods = set()
 
             for method in HTTP_METHODS:
-                _handler = getattr(handler.view_class, method.lower(), None)
+                view_class = getattr(handler, "view_class")
+                _handler = getattr(view_class, method.lower(), None)
                 if _handler:
                     methods.add(method)
                     if hasattr(_handler, "is_stream"):
                         stream = True
 
-        # handle composition view differently
-        if isinstance(handler, CompositionView):
-            methods = handler.handlers.keys()
-            for _handler in handler.handlers.values():
-                if hasattr(_handler, "is_stream"):
-                    stream = True
-                    break
-
         if strict_slashes is None:
             strict_slashes = self.strict_slashes
 
@@ -226,6 +266,8 @@ class RouteMixin:
             version=version,
             name=name,
             version_prefix=version_prefix,
+            error_format=error_format,
+            **ctx_kwargs,
         )(handler)
         return handler
 
@@ -233,13 +275,15 @@ class RouteMixin:
     def get(
         self,
         uri: str,
-        host: Optional[str] = None,
+        host: Optional[Union[str, List[str]]] = None,
         strict_slashes: Optional[bool] = None,
-        version: Optional[int] = None,
+        version: Optional[Union[int, str, float]] = None,
         name: Optional[str] = None,
         ignore_body: bool = True,
         version_prefix: str = "/v",
-    ):
+        error_format: Optional[str] = None,
+        **ctx_kwargs,
+    ) -> RouteWrapper:
         """
         Add an API URL under the **GET** *HTTP* method
 
@@ -251,6 +295,8 @@ class RouteMixin:
         :param name: Unique name that can be used to identify the Route
         :param version_prefix: URL path that should be before the version
             value; default: ``/v``
+        :param  ctx_kwargs: Keyword arguments that begin with a ctx_* prefix
+            will be appended to the route context (``route.ctx``)
         :return: Object decorated with :func:`route` method
         """
         return self.route(
@@ -262,18 +308,22 @@ class RouteMixin:
             name=name,
             ignore_body=ignore_body,
             version_prefix=version_prefix,
+            error_format=error_format,
+            **ctx_kwargs,
         )
 
     def post(
         self,
         uri: str,
-        host: Optional[str] = None,
+        host: Optional[Union[str, List[str]]] = None,
         strict_slashes: Optional[bool] = None,
         stream: bool = False,
-        version: Optional[int] = None,
+        version: Optional[Union[int, str, float]] = None,
         name: Optional[str] = None,
         version_prefix: str = "/v",
-    ):
+        error_format: Optional[str] = None,
+        **ctx_kwargs,
+    ) -> RouteWrapper:
         """
         Add an API URL under the **POST** *HTTP* method
 
@@ -285,6 +335,8 @@ class RouteMixin:
         :param name: Unique name that can be used to identify the Route
         :param version_prefix: URL path that should be before the version
             value; default: ``/v``
+        :param  ctx_kwargs: Keyword arguments that begin with a ctx_* prefix
+            will be appended to the route context (``route.ctx``)
         :return: Object decorated with :func:`route` method
         """
         return self.route(
@@ -296,18 +348,22 @@ class RouteMixin:
             version=version,
             name=name,
             version_prefix=version_prefix,
+            error_format=error_format,
+            **ctx_kwargs,
         )
 
     def put(
         self,
         uri: str,
-        host: Optional[str] = None,
+        host: Optional[Union[str, List[str]]] = None,
         strict_slashes: Optional[bool] = None,
         stream: bool = False,
-        version: Optional[int] = None,
+        version: Optional[Union[int, str, float]] = None,
         name: Optional[str] = None,
         version_prefix: str = "/v",
-    ):
+        error_format: Optional[str] = None,
+        **ctx_kwargs,
+    ) -> RouteWrapper:
         """
         Add an API URL under the **PUT** *HTTP* method
 
@@ -319,6 +375,8 @@ class RouteMixin:
         :param name: Unique name that can be used to identify the Route
         :param version_prefix: URL path that should be before the version
             value; default: ``/v``
+        :param  ctx_kwargs: Keyword arguments that begin with a ctx_* prefix
+            will be appended to the route context (``route.ctx``)
         :return: Object decorated with :func:`route` method
         """
         return self.route(
@@ -330,18 +388,22 @@ class RouteMixin:
             version=version,
             name=name,
             version_prefix=version_prefix,
+            error_format=error_format,
+            **ctx_kwargs,
         )
 
     def head(
         self,
         uri: str,
-        host: Optional[str] = None,
+        host: Optional[Union[str, List[str]]] = None,
         strict_slashes: Optional[bool] = None,
-        version: Optional[int] = None,
+        version: Optional[Union[int, str, float]] = None,
         name: Optional[str] = None,
         ignore_body: bool = True,
         version_prefix: str = "/v",
-    ):
+        error_format: Optional[str] = None,
+        **ctx_kwargs,
+    ) -> RouteWrapper:
         """
         Add an API URL under the **HEAD** *HTTP* method
 
@@ -361,6 +423,8 @@ class RouteMixin:
         :type ignore_body: bool, optional
         :param version_prefix: URL path that should be before the version
             value; default: ``/v``
+        :param  ctx_kwargs: Keyword arguments that begin with a ctx_* prefix
+            will be appended to the route context (``route.ctx``)
         :return: Object decorated with :func:`route` method
         """
         return self.route(
@@ -372,18 +436,22 @@ class RouteMixin:
             name=name,
             ignore_body=ignore_body,
             version_prefix=version_prefix,
+            error_format=error_format,
+            **ctx_kwargs,
         )
 
     def options(
         self,
         uri: str,
-        host: Optional[str] = None,
+        host: Optional[Union[str, List[str]]] = None,
         strict_slashes: Optional[bool] = None,
-        version: Optional[int] = None,
+        version: Optional[Union[int, str, float]] = None,
         name: Optional[str] = None,
         ignore_body: bool = True,
         version_prefix: str = "/v",
-    ):
+        error_format: Optional[str] = None,
+        **ctx_kwargs,
+    ) -> RouteWrapper:
         """
         Add an API URL under the **OPTIONS** *HTTP* method
 
@@ -403,6 +471,8 @@ class RouteMixin:
         :type ignore_body: bool, optional
         :param version_prefix: URL path that should be before the version
             value; default: ``/v``
+        :param  ctx_kwargs: Keyword arguments that begin with a ctx_* prefix
+            will be appended to the route context (``route.ctx``)
         :return: Object decorated with :func:`route` method
         """
         return self.route(
@@ -414,18 +484,22 @@ class RouteMixin:
             name=name,
             ignore_body=ignore_body,
             version_prefix=version_prefix,
+            error_format=error_format,
+            **ctx_kwargs,
         )
 
     def patch(
         self,
         uri: str,
-        host: Optional[str] = None,
+        host: Optional[Union[str, List[str]]] = None,
         strict_slashes: Optional[bool] = None,
         stream=False,
-        version: Optional[int] = None,
+        version: Optional[Union[int, str, float]] = None,
         name: Optional[str] = None,
         version_prefix: str = "/v",
-    ):
+        error_format: Optional[str] = None,
+        **ctx_kwargs,
+    ) -> RouteWrapper:
         """
         Add an API URL under the **PATCH** *HTTP* method
 
@@ -447,6 +521,8 @@ class RouteMixin:
         :type ignore_body: bool, optional
         :param version_prefix: URL path that should be before the version
             value; default: ``/v``
+        :param  ctx_kwargs: Keyword arguments that begin with a ctx_* prefix
+            will be appended to the route context (``route.ctx``)
         :return: Object decorated with :func:`route` method
         """
         return self.route(
@@ -458,18 +534,22 @@ class RouteMixin:
             version=version,
             name=name,
             version_prefix=version_prefix,
+            error_format=error_format,
+            **ctx_kwargs,
         )
 
     def delete(
         self,
         uri: str,
-        host: Optional[str] = None,
+        host: Optional[Union[str, List[str]]] = None,
         strict_slashes: Optional[bool] = None,
-        version: Optional[int] = None,
+        version: Optional[Union[int, str, float]] = None,
         name: Optional[str] = None,
         ignore_body: bool = True,
         version_prefix: str = "/v",
-    ):
+        error_format: Optional[str] = None,
+        **ctx_kwargs,
+    ) -> RouteWrapper:
         """
         Add an API URL under the **DELETE** *HTTP* method
 
@@ -481,6 +561,8 @@ class RouteMixin:
         :param name: Unique name that can be used to identify the Route
         :param version_prefix: URL path that should be before the version
             value; default: ``/v``
+        :param  ctx_kwargs: Keyword arguments that begin with a ctx_* prefix
+            will be appended to the route context (``route.ctx``)
         :return: Object decorated with :func:`route` method
         """
         return self.route(
@@ -492,18 +574,22 @@ class RouteMixin:
             name=name,
             ignore_body=ignore_body,
             version_prefix=version_prefix,
+            error_format=error_format,
+            **ctx_kwargs,
         )
 
     def websocket(
         self,
         uri: str,
-        host: Optional[str] = None,
+        host: Optional[Union[str, List[str]]] = None,
         strict_slashes: Optional[bool] = None,
         subprotocols: Optional[List[str]] = None,
-        version: Optional[int] = None,
+        version: Optional[Union[int, str, float]] = None,
         name: Optional[str] = None,
         apply: bool = True,
         version_prefix: str = "/v",
+        error_format: Optional[str] = None,
+        **ctx_kwargs,
     ):
         """
         Decorate a function to be registered as a websocket route
@@ -517,6 +603,8 @@ class RouteMixin:
                      be used with :func:`url_for`
         :param version_prefix: URL path that should be before the version
             value; default: ``/v``
+        :param  ctx_kwargs: Keyword arguments that begin with a ctx_* prefix
+            will be appended to the route context (``route.ctx``)
         :return: tuple of routes, decorated function
         """
         return self.route(
@@ -530,18 +618,22 @@ class RouteMixin:
             subprotocols=subprotocols,
             websocket=True,
             version_prefix=version_prefix,
+            error_format=error_format,
+            **ctx_kwargs,
         )
 
     def add_websocket_route(
         self,
         handler,
         uri: str,
-        host: Optional[str] = None,
+        host: Optional[Union[str, List[str]]] = None,
         strict_slashes: Optional[bool] = None,
         subprotocols=None,
-        version: Optional[int] = None,
+        version: Optional[Union[int, str, float]] = None,
         name: Optional[str] = None,
         version_prefix: str = "/v",
+        error_format: Optional[str] = None,
+        **ctx_kwargs,
     ):
         """
         A helper method to register a function as a websocket route.
@@ -560,6 +652,8 @@ class RouteMixin:
                 be used with :func:`url_for`
         :param version_prefix: URL path that should be before the version
             value; default: ``/v``
+        :param  ctx_kwargs: Keyword arguments that begin with a ctx_* prefix
+            will be appended to the route context (``route.ctx``)
         :return: Objected decorated by :func:`websocket`
         """
         return self.websocket(
@@ -570,6 +664,8 @@ class RouteMixin:
             version=version,
             name=name,
             version_prefix=version_prefix,
+            error_format=error_format,
+            **ctx_kwargs,
         )(handler)
 
     def static(
@@ -585,6 +681,7 @@ class RouteMixin:
         strict_slashes=None,
         content_type=None,
         apply=True,
+        resource_type=None,
     ):
         """
         Register a root to serve files from. The input can either be a
@@ -634,6 +731,7 @@ class RouteMixin:
             host,
             strict_slashes,
             content_type,
+            resource_type,
         )
         self._future_statics.add(static)
 
@@ -777,10 +875,11 @@ class RouteMixin:
             )
         except Exception:
             error_logger.exception(
-                f"Exception in static request handler:\
- path={file_or_directory}, "
+                f"Exception in static request handler: "
+                f"path={file_or_directory}, "
                 f"relative_url={__file_uri__}"
             )
+            raise
 
     def _register_static(
         self,
@@ -828,8 +927,27 @@ class RouteMixin:
         name = static.name
         # If we're not trying to match a file directly,
         # serve from the folder
-        if not path.isfile(file_or_directory):
+        if not static.resource_type:
+            if not path.isfile(file_or_directory):
+                uri += "/<__file_uri__:path>"
+        elif static.resource_type == "dir":
+            if path.isfile(file_or_directory):
+                raise TypeError(
+                    "Resource type improperly identified as directory. "
+                    f"'{file_or_directory}'"
+                )
             uri += "/<__file_uri__:path>"
+        elif static.resource_type == "file" and not path.isfile(
+            file_or_directory
+        ):
+            raise TypeError(
+                "Resource type improperly identified as file. "
+                f"'{file_or_directory}'"
+            )
+        elif static.resource_type != "file":
+            raise ValueError(
+                "The resource_type should be set to 'file' or 'dir'"
+            )
 
         # special prefix for static files
         # if not static.name.startswith("_static_"):
@@ -846,7 +964,7 @@ class RouteMixin:
             )
         )
 
-        route, _ = self.route(
+        route, _ = self.route(  # type: ignore
             uri=uri,
             methods=["GET", "HEAD"],
             name=name,
@@ -856,3 +974,74 @@ class RouteMixin:
         )(_handler)
 
         return route
+
+    def _determine_error_format(self, handler) -> str:
+        with suppress(OSError, TypeError):
+            src = dedent(getsource(handler))
+            tree = parse(src)
+            http_response_types = self._get_response_types(tree)
+
+            if len(http_response_types) == 1:
+                return next(iter(http_response_types))
+
+        return ""
+
+    def _get_response_types(self, node):
+        types = set()
+
+        class HttpResponseVisitor(NodeVisitor):
+            def visit_Return(self, node: Return) -> Any:
+                nonlocal types
+
+                with suppress(AttributeError):
+                    if node.value.func.id == "stream":  # type: ignore
+                        deprecation(
+                            "The sanic.response.stream method has been "
+                            "deprecated and will be removed in v22.6. Please "
+                            "upgrade your application to use the new style "
+                            "streaming pattern. See "
+                            "https://sanicframework.org/en/guide/advanced/"
+                            "streaming.html#response-streaming for more "
+                            "information.",
+                            22.6,
+                        )
+                    checks = [node.value.func.id]  # type: ignore
+                    if node.value.keywords:  # type: ignore
+                        checks += [
+                            k.value
+                            for k in node.value.keywords  # type: ignore
+                            if k.arg == "content_type"
+                        ]
+
+                    for check in checks:
+                        if check in RESPONSE_MAPPING:
+                            types.add(RESPONSE_MAPPING[check])
+
+        HttpResponseVisitor().visit(node)
+
+        return types
+
+    def _build_route_context(self, raw):
+        ctx_kwargs = {
+            key.replace("ctx_", ""): raw.pop(key)
+            for key in {**raw}.keys()
+            if key.startswith("ctx_")
+        }
+        restricted = [
+            key for key in ctx_kwargs.keys() if key in RESTRICTED_ROUTE_CONTEXT
+        ]
+        if restricted:
+            restricted_arguments = ", ".join(restricted)
+            raise AttributeError(
+                "Cannot use restricted route context: "
+                f"{restricted_arguments}. This limitation is only in place "
+                "until v22.3 when the restricted names will no longer be in"
+                "conflict. See https://github.com/sanic-org/sanic/issues/2303 "
+                "for more information."
+            )
+        if raw:
+            unexpected_arguments = ", ".join(raw.keys())
+            raise TypeError(
+                f"Unexpected keyword arguments: {unexpected_arguments}"
+            )
+        return HashableDict(ctx_kwargs)

sanic/mixins/signals.py

@@ -1,16 +1,14 @@
-from typing import Any, Callable, Dict, Optional, Set
+from enum import Enum
+from typing import Any, Callable, Dict, Optional, Set, Union
 
+from sanic.base.meta import SanicMeta
 from sanic.models.futures import FutureSignal
 from sanic.models.handler_types import SignalHandler
 from sanic.signals import Signal
+from sanic.types import HashableDict
 
 
-class HashableDict(dict):
-    def __hash__(self):
-        return hash(tuple(sorted(self.items())))
-
-
-class SignalMixin:
+class SignalMixin(metaclass=SanicMeta):
     def __init__(self, *args, **kwargs) -> None:
         self._future_signals: Set[FutureSignal] = set()
 
@@ -19,11 +17,12 @@ class SignalMixin:
 
     def signal(
         self,
-        event: str,
+        event: Union[str, Enum],
         *,
         apply: bool = True,
         condition: Dict[str, Any] = None,
-    ) -> Callable[[SignalHandler], FutureSignal]:
+        exclusive: bool = True,
+    ) -> Callable[[SignalHandler], SignalHandler]:
         """
         For creating a signal handler, used similar to a route handler:
 
@@ -35,26 +34,29 @@ class SignalMixin:
 
         :param event: Representation of the event in ``one.two.three`` form
         :type event: str
-        :param apply: For lazy evaluation, defaults to True
+        :param apply: For lazy evaluation, defaults to ``True``
         :type apply: bool, optional
         :param condition: For use with the ``condition`` argument in dispatch
-            filtering, defaults to None
+            filtering, defaults to ``None``
+        :param exclusive: When ``True``, the signal can only be dispatched
+            when the condition has been met. When ``False``, the signal can
+            be dispatched either with or without it. *THIS IS INAPPLICABLE TO
+            BLUEPRINT SIGNALS. THEY ARE ALWAYS NON-EXCLUSIVE*, defaults
+            to ``True``
         :type condition: Dict[str, Any], optional
         """
+        event_value = str(event.value) if isinstance(event, Enum) else event
 
         def decorator(handler: SignalHandler):
-            nonlocal event
-            nonlocal apply
-
             future_signal = FutureSignal(
-                handler, event, HashableDict(condition or {})
+                handler, event_value, HashableDict(condition or {}), exclusive
             )
             self._future_signals.add(future_signal)
 
             if apply:
                 self._apply_signal(future_signal)
 
-            return future_signal
+            return handler
 
         return decorator
 
@@ -63,6 +65,7 @@ class SignalMixin:
         handler: Optional[Callable[..., Any]],
         event: str,
         condition: Dict[str, Any] = None,
+        exclusive: bool = True,
     ):
         if not handler:
 
@@ -70,7 +73,9 @@ class SignalMixin:
                 ...
 
             handler = noop
-        self.signal(event=event, condition=condition)(handler)
+        self.signal(event=event, condition=condition, exclusive=exclusive)(
+            handler
+        )
         return handler
 
     def event(self, event: str):

sanic/models/asgi.py

@@ -1,9 +1,10 @@
 import asyncio
+import sys
 
 from typing import Any, Awaitable, Callable, MutableMapping, Optional, Union
 
 from sanic.exceptions import InvalidUsage
-from sanic.websocket import WebSocketConnection
+from sanic.server.websockets.connection import WebSocketConnection
 
 
 ASGIScope = MutableMapping[str, Any]
@@ -14,10 +15,20 @@ ASGIReceive = Callable[[], Awaitable[ASGIMessage]]
 
 class MockProtocol:
     def __init__(self, transport: "MockTransport", loop):
+        # This should be refactored when < 3.8 support is dropped
         self.transport = transport
-        self._not_paused = asyncio.Event(loop=loop)
-        self._not_paused.set()
-        self._complete = asyncio.Event(loop=loop)
+        # Fixup for 3.8+; Sanic still supports 3.7 where loop is required
+        loop = loop if sys.version_info[:2] < (3, 8) else None
+        # Optional in 3.9, necessary in 3.10 because the parameter "loop"
+        # was completely removed
+        if not loop:
+            self._not_paused = asyncio.Event()
+            self._not_paused.set()
+            self._complete = asyncio.Event()
+        else:
+            self._not_paused = asyncio.Event(loop=loop)
+            self._not_paused.set()
+            self._complete = asyncio.Event(loop=loop)
 
     def pause_writing(self) -> None:
         self._not_paused.clear()

sanic/models/futures.py

@@ -7,13 +7,14 @@ from sanic.models.handler_types import (
     MiddlewareType,
     SignalHandler,
 )
+from sanic.types import HashableDict
 
 
 class FutureRoute(NamedTuple):
     handler: str
     uri: str
     methods: Optional[Iterable[str]]
-    host: str
+    host: Union[str, List[str]]
     strict_slashes: bool
     stream: bool
     version: Optional[int]
@@ -24,6 +25,8 @@ class FutureRoute(NamedTuple):
     unquote: bool
     static: bool
     version_prefix: str
+    error_format: Optional[str]
+    route_context: HashableDict
 
 
 class FutureListener(NamedTuple):
@@ -52,9 +55,15 @@ class FutureStatic(NamedTuple):
     host: Optional[str]
     strict_slashes: Optional[bool]
     content_type: Optional[bool]
+    resource_type: Optional[str]
 
 
 class FutureSignal(NamedTuple):
     handler: SignalHandler
     event: str
     condition: Optional[Dict[str, str]]
+    exclusive: bool
+
+
+class FutureRegistry(set):
+    ...

sanic/models/handler_types.py

@@ -21,5 +21,5 @@ MiddlewareType = Union[RequestMiddlewareType, ResponseMiddlewareType]
 ListenerType = Callable[
     [Sanic, AbstractEventLoop], Optional[Coroutine[Any, Any, None]]
 ]
-RouteHandler = Callable[..., Coroutine[Any, Any, HTTPResponse]]
+RouteHandler = Callable[..., Coroutine[Any, Any, Optional[HTTPResponse]]]
 SignalHandler = Callable[..., Coroutine[Any, Any, None]]

sanic/models/server_types.py

@@ -0,0 +1,64 @@
+from ssl import SSLObject
+from types import SimpleNamespace
+from typing import Any, Dict, Optional
+
+from sanic.models.protocol_types import TransportProtocol
+
+
+class Signal:
+    stopped = False
+
+
+class ConnInfo:
+    """
+    Local and remote addresses and SSL status info.
+    """
+
+    __slots__ = (
+        "client_port",
+        "client",
+        "client_ip",
+        "ctx",
+        "peername",
+        "server_port",
+        "server",
+        "server_name",
+        "sockname",
+        "ssl",
+        "cert",
+    )
+
+    def __init__(self, transport: TransportProtocol, unix=None):
+        self.ctx = SimpleNamespace()
+        self.peername = None
+        self.server = self.client = ""
+        self.server_port = self.client_port = 0
+        self.client_ip = ""
+        self.sockname = addr = transport.get_extra_info("sockname")
+        self.ssl = False
+        self.server_name = ""
+        self.cert: Dict[str, Any] = {}
+        sslobj: Optional[SSLObject] = transport.get_extra_info(
+            "ssl_object"
+        )  # type: ignore
+        if sslobj:
+            self.ssl = True
+            self.server_name = getattr(sslobj, "sanic_server_name", None) or ""
+            self.cert = dict(getattr(sslobj.context, "sanic", {}))
+        if isinstance(addr, str):  # UNIX socket
+            self.server = unix or addr
+            return
+
+        # IPv4 (ip, port) or IPv6 (ip, port, flowinfo, scopeid)
+        if isinstance(addr, tuple):
+            self.server = addr[0] if len(addr) == 2 else f"[{addr[0]}]"
+            self.server_port = addr[1]
+            # self.server gets non-standard port appended
+            if addr[1] != (443 if self.ssl else 80):
+                self.server = f"{self.server}:{addr[1]}"
+        self.peername = addr = transport.get_extra_info("peername")
+
+        if isinstance(addr, tuple):
+            self.client = addr[0] if len(addr) == 2 else f"[{addr[0]}]"
+            self.client_ip = addr[0]
+            self.client_port = addr[1]

sanic/reloader_helpers.py

@@ -6,9 +6,6 @@ import sys
 
 from time import sleep
 
-from sanic.config import BASE_LOGO
-from sanic.log import logger
-
 
 def _iter_module_files():
     """This iterates over all relevant Python files.
@@ -50,13 +47,19 @@ def _get_args_for_reloading():
     return [sys.executable] + sys.argv
 
 
-def restart_with_reloader():
+def restart_with_reloader(changed=None):
     """Create a new process and a subprocess in it with the same arguments as
     this one.
     """
+    reloaded = ",".join(changed) if changed else ""
     return subprocess.Popen(
         _get_args_for_reloading(),
-        env={**os.environ, "SANIC_SERVER_RUNNING": "true"},
+        env={
+            **os.environ,
+            "SANIC_SERVER_RUNNING": "true",
+            "SANIC_RELOADER_PROCESS": "true",
+            "SANIC_RELOADED_FILES": reloaded,
+        },
     )
 
 
@@ -91,31 +94,29 @@ def watchdog(sleep_interval, app):
 
     worker_process = restart_with_reloader()
 
-    if app.config.LOGO:
-        logger.debug(
-            app.config.LOGO if isinstance(app.config.LOGO, str) else BASE_LOGO
-        )
-
     try:
         while True:
-            need_reload = False
 
+            changed = set()
             for filename in itertools.chain(
                 _iter_module_files(),
                 *(d.glob("**/*") for d in app.reload_dirs),
             ):
                 try:
-                    check = _check_file(filename, mtimes)
+                    if _check_file(filename, mtimes):
+                        path = (
+                            filename
+                            if isinstance(filename, str)
+                            else filename.resolve()
+                        )
+                        changed.add(str(path))
                 except OSError:
                     continue
 
-                if check:
-                    need_reload = True
-
-            if need_reload:
+            if changed:
                 worker_process.terminate()
                 worker_process.wait()
-                worker_process = restart_with_reloader()
+                worker_process = restart_with_reloader(changed)
 
             sleep(sleep_interval)
     except KeyboardInterrupt:

sanic/request.py

@@ -15,10 +15,9 @@ from typing import (
 from sanic_routing.route import Route  # type: ignore
 
 
-if TYPE_CHECKING:
+if TYPE_CHECKING:  # no cov
     from sanic.server import ConnInfo
     from sanic.app import Sanic
-    from sanic.http import Http
 
 import email.utils
 import uuid
@@ -32,14 +31,17 @@ from httptools import parse_url  # type: ignore
 
 from sanic.compat import CancelledErrors, Header
 from sanic.constants import DEFAULT_HTTP_CONTENT_TYPE
-from sanic.exceptions import InvalidUsage
+from sanic.exceptions import InvalidUsage, ServerError
 from sanic.headers import (
+    AcceptContainer,
     Options,
+    parse_accept,
     parse_content_header,
     parse_forwarded,
     parse_host,
     parse_xforwarded,
 )
+from sanic.http import Http, Stage
 from sanic.log import error_logger, logger
 from sanic.models.protocol_types import TransportProtocol
 from sanic.response import BaseHTTPResponse, HTTPResponse
@@ -94,6 +96,7 @@ class Request:
         "head",
         "headers",
         "method",
+        "parsed_accept",
         "parsed_args",
         "parsed_not_grouped_args",
         "parsed_files",
@@ -101,6 +104,7 @@ class Request:
         "parsed_json",
         "parsed_forwarded",
         "raw_url",
+        "responded",
         "request_middleware_started",
         "route",
         "stream",
@@ -136,6 +140,7 @@ class Request:
         self.conn_info: Optional[ConnInfo] = None
         self.ctx = SimpleNamespace()
         self.parsed_forwarded: Optional[Options] = None
+        self.parsed_accept: Optional[AcceptContainer] = None
         self.parsed_json = None
         self.parsed_form = None
         self.parsed_files = None
@@ -151,6 +156,7 @@ class Request:
         self.stream: Optional[Http] = None
         self.route: Optional[Route] = None
         self._protocol = None
+        self.responded: bool = False
 
     def __repr__(self):
         class_name = self.__class__.__name__
@@ -160,6 +166,21 @@ class Request:
     def generate_id(*_):
         return uuid.uuid4()
 
+    def reset_response(self):
+        try:
+            if (
+                self.stream is not None
+                and self.stream.stage is not Stage.HANDLER
+            ):
+                raise ServerError(
+                    "Cannot reset response because previous response was sent."
+                )
+            self.stream.response.stream = None
+            self.stream.response = None
+            self.responded = False
+        except AttributeError:
+            pass
+
     async def respond(
         self,
         response: Optional[BaseHTTPResponse] = None,
@@ -168,13 +189,19 @@ class Request:
         headers: Optional[Union[Header, Dict[str, str]]] = None,
         content_type: Optional[str] = None,
     ):
+        try:
+            if self.stream is not None and self.stream.response:
+                raise ServerError("Second respond call is not allowed.")
+        except AttributeError:
+            pass
         # This logic of determining which response to use is subject to change
         if response is None:
-            response = (self.stream and self.stream.response) or HTTPResponse(
+            response = HTTPResponse(
                 status=status,
                 headers=headers,
                 content_type=content_type,
             )
+
         # Connect the response
         if isinstance(response, BaseHTTPResponse) and self.stream:
             response = self.stream.respond(response)
@@ -189,6 +216,7 @@ class Request:
             error_logger.exception(
                 "Exception occurred in one of response middleware handlers"
             )
+        self.responded = True
         return response
 
     async def receive_body(self):
@@ -296,6 +324,13 @@ class Request:
 
         return self.parsed_json
 
+    @property
+    def accept(self) -> AcceptContainer:
+        if self.parsed_accept is None:
+            accept_header = self.headers.getone("accept", "")
+            self.parsed_accept = parse_accept(accept_header)
+        return self.parsed_accept
+
     @property
     def token(self):
         """Attempt to return the auth header token.
@@ -497,6 +532,10 @@ class Request:
         """
         return self._match_info
 
+    @match_info.setter
+    def match_info(self, value):
+        self._match_info = value
+
     # Transport properties (obtained from local interface only)
 
     @property
@@ -745,9 +784,10 @@ def parse_multipart_form(body, boundary):
                 break
 
             colon_index = form_line.index(":")
+            idx = colon_index + 2
             form_header_field = form_line[0:colon_index].lower()
             form_header_value, form_parameters = parse_content_header(
-                form_line[colon_index + 2 :]
+                form_line[idx:]
             )
 
             if form_header_field == "content-disposition":

sanic/response.py

@@ -1,8 +1,11 @@
+from __future__ import annotations
+
 from functools import partial
 from mimetypes import guess_type
 from os import path
 from pathlib import PurePath
 from typing import (
+    TYPE_CHECKING,
     Any,
     AnyStr,
     Callable,
@@ -11,19 +14,27 @@ from typing import (
     Iterator,
     Optional,
     Tuple,
+    TypeVar,
     Union,
 )
 from urllib.parse import quote_plus
-from warnings import warn
 
 from sanic.compat import Header, open_async
 from sanic.constants import DEFAULT_HTTP_CONTENT_TYPE
 from sanic.cookies import CookieJar
+from sanic.exceptions import SanicException, ServerError
 from sanic.helpers import has_message_body, remove_entity_headers
 from sanic.http import Http
 from sanic.models.protocol_types import HTMLProtocol, Range
 
 
+if TYPE_CHECKING:
+    from sanic.asgi import ASGIApp
+    from sanic.request import Request
+else:
+    Request = TypeVar("Request")
+
+
 try:
     from ujson import dumps as json_dumps
 except ImportError:
@@ -45,7 +56,7 @@ class BaseHTTPResponse:
         self.asgi: bool = False
         self.body: Optional[bytes] = None
         self.content_type: Optional[str] = None
-        self.stream: Http = None
+        self.stream: Optional[Union[Http, ASGIApp]] = None
         self.status: int = None
         self.headers = Header({})
         self._cookies: Optional[CookieJar] = None
@@ -101,7 +112,7 @@ class BaseHTTPResponse:
 
     async def send(
         self,
-        data: Optional[Union[AnyStr]] = None,
+        data: Optional[AnyStr] = None,
         end_stream: Optional[bool] = None,
     ) -> None:
         """
@@ -112,8 +123,17 @@ class BaseHTTPResponse:
         """
         if data is None and end_stream is None:
             end_stream = True
-        if end_stream and not data and self.stream.send is None:
-            return
+        if self.stream is None:
+            raise SanicException(
+                "No stream is connected to the response object instance."
+            )
+        if self.stream.send is None:
+            if end_stream and not data:
+                return
+            raise ServerError(
+                "Response stream was ended, no more response data is "
+                "allowed to be sent."
+            )
         data = (
             data.encode()  # type: ignore
             if hasattr(data, "encode")
@@ -122,95 +142,6 @@ class BaseHTTPResponse:
         await self.stream.send(data, end_stream=end_stream)
 
 
-StreamingFunction = Callable[[BaseHTTPResponse], Coroutine[Any, Any, None]]
-
-
-class StreamingHTTPResponse(BaseHTTPResponse):
-    """
-    Old style streaming response where you pass a streaming function:
-
-    .. code-block:: python
-
-        async def sample_streaming_fn(response):
-            await response.write("foo")
-            await asyncio.sleep(1)
-            await response.write("bar")
-            await asyncio.sleep(1)
-
-            @app.post("/")
-            async def test(request):
-                return stream(sample_streaming_fn)
-
-    .. warning::
-
-        **Deprecated** and set for removal in v21.12. You can now achieve the
-        same functionality without a callback.
-
-        .. code-block:: python
-
-            @app.post("/")
-            async def test(request):
-                response = await request.respond()
-                await response.send("foo", False)
-                await asyncio.sleep(1)
-                await response.send("bar", False)
-                await asyncio.sleep(1)
-                await response.send("", True)
-                return response
-
-    """
-
-    __slots__ = (
-        "streaming_fn",
-        "status",
-        "content_type",
-        "headers",
-        "_cookies",
-    )
-
-    def __init__(
-        self,
-        streaming_fn: StreamingFunction,
-        status: int = 200,
-        headers: Optional[Union[Header, Dict[str, str]]] = None,
-        content_type: str = "text/plain; charset=utf-8",
-        ignore_deprecation_notice: bool = False,
-    ):
-        if not ignore_deprecation_notice:
-            warn(
-                "Use of the StreamingHTTPResponse is deprecated in v21.6, and "
-                "will be removed in v21.12. Please upgrade your streaming "
-                "response implementation. You can learn more here: "
-                "https://sanicframework.org/en/guide/advanced/streaming.html"
-                "#response-streaming. If you use the builtin stream() or "
-                "file_stream() methods, this upgrade will be be done for you."
-            )
-
-        super().__init__()
-
-        self.content_type = content_type
-        self.streaming_fn = streaming_fn
-        self.status = status
-        self.headers = Header(headers or {})
-        self._cookies = None
-
-    async def write(self, data):
-        """Writes a chunk of data to the streaming response.
-
-        :param data: str or bytes-ish data to be written.
-        """
-        await super().send(self._encode_body(data))
-
-    async def send(self, *args, **kwargs):
-        if self.streaming_fn is not None:
-            await self.streaming_fn(self)
-            self.streaming_fn = None
-        await super().send(*args, **kwargs)
-
-    async def eof(self):
-        raise NotImplementedError
-
-
 class HTTPResponse(BaseHTTPResponse):
     """
     HTTP response to be sent back to the client.
@@ -405,6 +336,109 @@ async def file(
     )
 
 
+def redirect(
+    to: str,
+    headers: Optional[Dict[str, str]] = None,
+    status: int = 302,
+    content_type: str = "text/html; charset=utf-8",
+) -> HTTPResponse:
+    """
+    Abort execution and cause a 302 redirect (by default) by setting a
+    Location header.
+
+    :param to: path or fully qualified URL to redirect to
+    :param headers: optional dict of headers to include in the new request
+    :param status: status code (int) of the new request, defaults to 302
+    :param content_type: the content type (string) of the response
+    """
+    headers = headers or {}
+
+    # URL Quote the URL before redirecting
+    safe_to = quote_plus(to, safe=":/%#?&=@[]!$&'()*+,;")
+
+    # According to RFC 7231, a relative URI is now permitted.
+    headers["Location"] = safe_to
+
+    return HTTPResponse(
+        status=status, headers=headers, content_type=content_type
+    )
+
+
+class ResponseStream:
+    """
+    ResponseStream is a compat layer to bridge the gap after the deprecation
+    of StreamingHTTPResponse. In v22.6 it will be removed when:
+    - stream is removed
+    - file_stream is moved to new style streaming
+    - file and file_stream are combined into a single API
+    """
+
+    __slots__ = (
+        "_cookies",
+        "content_type",
+        "headers",
+        "request",
+        "response",
+        "status",
+        "streaming_fn",
+    )
+
+    def __init__(
+        self,
+        streaming_fn: Callable[
+            [Union[BaseHTTPResponse, ResponseStream]],
+            Coroutine[Any, Any, None],
+        ],
+        status: int = 200,
+        headers: Optional[Union[Header, Dict[str, str]]] = None,
+        content_type: Optional[str] = None,
+    ):
+        self.streaming_fn = streaming_fn
+        self.status = status
+        self.headers = headers or Header()
+        self.content_type = content_type
+        self.request: Optional[Request] = None
+        self._cookies: Optional[CookieJar] = None
+
+    async def write(self, message: str):
+        await self.response.send(message)
+
+    async def stream(self) -> HTTPResponse:
+        if not self.request:
+            raise ServerError("Attempted response to unknown request")
+        self.response = await self.request.respond(
+            headers=self.headers,
+            status=self.status,
+            content_type=self.content_type,
+        )
+        await self.streaming_fn(self)
+        return self.response
+
+    async def eof(self) -> None:
+        await self.response.eof()
+
+    @property
+    def cookies(self) -> CookieJar:
+        if self._cookies is None:
+            self._cookies = CookieJar(self.headers)
+        return self._cookies
+
+    @property
+    def processed_headers(self):
+        return self.response.processed_headers
+
+    @property
+    def body(self):
+        return self.response.body
+
+    def __call__(self, request: Request) -> ResponseStream:
+        self.request = request
+        return self
+
+    def __await__(self):
+        return self.stream().__await__()
+
+
 async def file_stream(
     location: Union[str, PurePath],
     status: int = 200,
@@ -413,7 +447,7 @@ async def file_stream(
     headers: Optional[Dict[str, str]] = None,
     filename: Optional[str] = None,
     _range: Optional[Range] = None,
-) -> StreamingHTTPResponse:
+) -> ResponseStream:
     """Return a streaming response object with file data.
 
     :param location: Location of file on system.
@@ -421,7 +455,6 @@ async def file_stream(
     :param mime_type: Specific mime_type.
     :param headers: Custom Headers.
     :param filename: Override filename.
-    :param chunked: Deprecated
     :param _range:
     """
     headers = headers or {}
@@ -457,23 +490,24 @@ async def file_stream(
                         break
                     await response.write(content)
 
-    return StreamingHTTPResponse(
+    return ResponseStream(
         streaming_fn=_streaming_fn,
         status=status,
         headers=headers,
         content_type=mime_type,
-        ignore_deprecation_notice=True,
     )
 
 
 def stream(
-    streaming_fn: StreamingFunction,
+    streaming_fn: Callable[
+        [Union[BaseHTTPResponse, ResponseStream]], Coroutine[Any, Any, None]
+    ],
     status: int = 200,
     headers: Optional[Dict[str, str]] = None,
     content_type: str = "text/plain; charset=utf-8",
-):
-    """Accepts an coroutine `streaming_fn` which can be used to
-    write chunks to a streaming response. Returns a `StreamingHTTPResponse`.
+) -> ResponseStream:
+    """Accepts a coroutine `streaming_fn` which can be used to
+    write chunks to a streaming response. Returns a `ResponseStream`.
 
     Example usage::
 
@@ -487,42 +521,13 @@ def stream(
 
     :param streaming_fn: A coroutine accepts a response and
         writes content to that response.
-    :param mime_type: Specific mime_type.
+    :param status: HTTP status.
+    :param content_type: Specific content_type.
     :param headers: Custom Headers.
-    :param chunked: Deprecated
     """
-    return StreamingHTTPResponse(
+    return ResponseStream(
         streaming_fn,
         headers=headers,
         content_type=content_type,
         status=status,
-        ignore_deprecation_notice=True,
-    )
-
-
-def redirect(
-    to: str,
-    headers: Optional[Dict[str, str]] = None,
-    status: int = 302,
-    content_type: str = "text/html; charset=utf-8",
-) -> HTTPResponse:
-    """
-    Abort execution and cause a 302 redirect (by default) by setting a
-    Location header.
-
-    :param to: path or fully qualified URL to redirect to
-    :param headers: optional dict of headers to include in the new request
-    :param status: status code (int) of the new request, defaults to 302
-    :param content_type: the content type (string) of the response
-    """
-    headers = headers or {}
-
-    # URL Quote the URL before redirecting
-    safe_to = quote_plus(to, safe=":/%#?&=@[]!$&'()*+,;")
-
-    # According to RFC 7231, a relative URI is now permitted.
-    headers["Location"] = safe_to
-
-    return HTTPResponse(
-        status=status, headers=headers, content_type=content_type
     )

sanic/router.py

@@ -1,5 +1,9 @@
+from __future__ import annotations
+
 from functools import lru_cache
+from inspect import signature
 from typing import Any, Dict, Iterable, List, Optional, Tuple, Union
+from uuid import UUID
 
 from sanic_routing import BaseRouter  # type: ignore
 from sanic_routing.exceptions import NoMethod  # type: ignore
@@ -9,6 +13,7 @@ from sanic_routing.exceptions import (
 from sanic_routing.route import Route  # type: ignore
 
 from sanic.constants import HTTP_METHODS
+from sanic.errorpages import check_error_format
 from sanic.exceptions import MethodNotSupported, NotFound, SanicException
 from sanic.models.handler_types import RouteHandler
 
@@ -49,7 +54,7 @@ class Router(BaseRouter):
         self, path: str, method: str, host: Optional[str]
     ) -> Tuple[Route, RouteHandler, Dict[str, Any]]:
         """
-        Retrieve a `Route` object containg the details about how to handle
+        Retrieve a `Route` object containing the details about how to handle
         a response for a given request
 
         :param request: the incoming request object
@@ -74,6 +79,7 @@ class Router(BaseRouter):
         unquote: bool = False,
         static: bool = False,
         version_prefix: str = "/v",
+        error_format: Optional[str] = None,
     ) -> Union[Route, List[Route]]:
         """
         Add a handler to the router
@@ -106,6 +112,8 @@ class Router(BaseRouter):
             version = str(version).strip("/").lstrip("v")
             uri = "/".join([f"{version_prefix}{version}", uri.lstrip("/")])
 
+        uri = self._normalize(uri, handler)
+
         params = dict(
             path=uri,
             handler=handler,
@@ -131,6 +139,10 @@ class Router(BaseRouter):
             route.ctx.stream = stream
             route.ctx.hosts = hosts
             route.ctx.static = static
+            route.ctx.error_format = error_format
+
+            if error_format:
+                check_error_format(route.ctx.error_format)
 
             routes.append(route)
 
@@ -187,3 +199,24 @@ class Router(BaseRouter):
                 raise SanicException(
                     f"Invalid route: {route}. Parameter names cannot use '__'."
                 )
+
+    def _normalize(self, uri: str, handler: RouteHandler) -> str:
+        if "<" not in uri:
+            return uri
+
+        sig = signature(handler)
+        mapping = {
+            param.name: param.annotation.__name__.lower()
+            for param in sig.parameters.values()
+            if param.annotation in (str, int, float, UUID)
+        }
+
+        reconstruction = []
+        for part in uri.split("/"):
+            if part.startswith("<") and ":" not in part:
+                name = part[1:-1]
+                annotation = mapping.get(name)
+                if annotation:
+                    part = f"<{name}:{annotation}>"
+            reconstruction.append(part)
+        return "/".join(reconstruction)

sanic/server.py

@@ -1,793 +0,0 @@
-from __future__ import annotations
-
-from ssl import SSLContext
-from types import SimpleNamespace
-from typing import (
-    TYPE_CHECKING,
-    Any,
-    Callable,
-    Dict,
-    Iterable,
-    Optional,
-    Type,
-    Union,
-)
-
-from sanic.models.handler_types import ListenerType
-
-
-if TYPE_CHECKING:
-    from sanic.app import Sanic
-
-import asyncio
-import multiprocessing
-import os
-import secrets
-import socket
-import stat
-
-from asyncio import CancelledError
-from asyncio.transports import Transport
-from functools import partial
-from inspect import isawaitable
-from ipaddress import ip_address
-from signal import SIG_IGN, SIGINT, SIGTERM, Signals
-from signal import signal as signal_func
-from time import monotonic as current_time
-
-from sanic.compat import OS_IS_WINDOWS, ctrlc_workaround_for_windows
-from sanic.config import Config
-from sanic.exceptions import RequestTimeout, ServiceUnavailable
-from sanic.http import Http, Stage
-from sanic.log import error_logger, logger
-from sanic.models.protocol_types import TransportProtocol
-from sanic.request import Request
-
-
-try:
-    import uvloop  # type: ignore
-
-    if not isinstance(asyncio.get_event_loop_policy(), uvloop.EventLoopPolicy):
-        asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
-except ImportError:
-    pass
-
-
-class Signal:
-    stopped = False
-
-
-class ConnInfo:
-    """
-    Local and remote addresses and SSL status info.
-    """
-
-    __slots__ = (
-        "client_port",
-        "client",
-        "client_ip",
-        "ctx",
-        "peername",
-        "server_port",
-        "server",
-        "sockname",
-        "ssl",
-    )
-
-    def __init__(self, transport: TransportProtocol, unix=None):
-        self.ctx = SimpleNamespace()
-        self.peername = None
-        self.server = self.client = ""
-        self.server_port = self.client_port = 0
-        self.client_ip = ""
-        self.sockname = addr = transport.get_extra_info("sockname")
-        self.ssl: bool = bool(transport.get_extra_info("sslcontext"))
-
-        if isinstance(addr, str):  # UNIX socket
-            self.server = unix or addr
-            return
-
-        # IPv4 (ip, port) or IPv6 (ip, port, flowinfo, scopeid)
-        if isinstance(addr, tuple):
-            self.server = addr[0] if len(addr) == 2 else f"[{addr[0]}]"
-            self.server_port = addr[1]
-            # self.server gets non-standard port appended
-            if addr[1] != (443 if self.ssl else 80):
-                self.server = f"{self.server}:{addr[1]}"
-        self.peername = addr = transport.get_extra_info("peername")
-
-        if isinstance(addr, tuple):
-            self.client = addr[0] if len(addr) == 2 else f"[{addr[0]}]"
-            self.client_ip = addr[0]
-            self.client_port = addr[1]
-
-
-class HttpProtocol(asyncio.Protocol):
-    """
-    This class provides a basic HTTP implementation of the sanic framework.
-    """
-
-    __slots__ = (
-        # app
-        "app",
-        # event loop, connection
-        "loop",
-        "transport",
-        "connections",
-        "signal",
-        "conn_info",
-        "ctx",
-        # request params
-        "request",
-        # request config
-        "request_handler",
-        "request_timeout",
-        "response_timeout",
-        "keep_alive_timeout",
-        "request_max_size",
-        "request_class",
-        "error_handler",
-        # enable or disable access log purpose
-        "access_log",
-        # connection management
-        "state",
-        "url",
-        "_handler_task",
-        "_can_write",
-        "_data_received",
-        "_time",
-        "_task",
-        "_http",
-        "_exception",
-        "recv_buffer",
-        "_unix",
-    )
-
-    def __init__(
-        self,
-        *,
-        loop,
-        app: Sanic,
-        signal=None,
-        connections=None,
-        state=None,
-        unix=None,
-        **kwargs,
-    ):
-        asyncio.set_event_loop(loop)
-        self.loop = loop
-        self.app: Sanic = app
-        self.url = None
-        self.transport: Optional[Transport] = None
-        self.conn_info: Optional[ConnInfo] = None
-        self.request: Optional[Request] = None
-        self.signal = signal or Signal()
-        self.access_log = self.app.config.ACCESS_LOG
-        self.connections = connections if connections is not None else set()
-        self.request_handler = self.app.handle_request
-        self.error_handler = self.app.error_handler
-        self.request_timeout = self.app.config.REQUEST_TIMEOUT
-        self.response_timeout = self.app.config.RESPONSE_TIMEOUT
-        self.keep_alive_timeout = self.app.config.KEEP_ALIVE_TIMEOUT
-        self.request_max_size = self.app.config.REQUEST_MAX_SIZE
-        self.request_class = self.app.request_class or Request
-        self.state = state if state else {}
-        if "requests_count" not in self.state:
-            self.state["requests_count"] = 0
-        self._data_received = asyncio.Event()
-        self._can_write = asyncio.Event()
-        self._can_write.set()
-        self._exception = None
-        self._unix = unix
-
-    def _setup_connection(self):
-        self._http = Http(self)
-        self._time = current_time()
-        self.check_timeouts()
-
-    async def connection_task(self):
-        """
-        Run a HTTP connection.
-
-        Timeouts and some additional error handling occur here, while most of
-        everything else happens in class Http or in code called from there.
-        """
-        try:
-            self._setup_connection()
-            await self._http.http1()
-        except CancelledError:
-            pass
-        except Exception:
-            error_logger.exception("protocol.connection_task uncaught")
-        finally:
-            if self.app.debug and self._http:
-                ip = self.transport.get_extra_info("peername")
-                error_logger.error(
-                    "Connection lost before response written"
-                    f" @ {ip} {self._http.request}"
-                )
-            self._http = None
-            self._task = None
-            try:
-                self.close()
-            except BaseException:
-                error_logger.exception("Closing failed")
-
-    async def receive_more(self):
-        """
-        Wait until more data is received into the Server protocol's buffer
-        """
-        self.transport.resume_reading()
-        self._data_received.clear()
-        await self._data_received.wait()
-
-    def check_timeouts(self):
-        """
-        Runs itself periodically to enforce any expired timeouts.
-        """
-        try:
-            if not self._task:
-                return
-            duration = current_time() - self._time
-            stage = self._http.stage
-            if stage is Stage.IDLE and duration > self.keep_alive_timeout:
-                logger.debug("KeepAlive Timeout. Closing connection.")
-            elif stage is Stage.REQUEST and duration > self.request_timeout:
-                logger.debug("Request Timeout. Closing connection.")
-                self._http.exception = RequestTimeout("Request Timeout")
-            elif stage is Stage.HANDLER and self._http.upgrade_websocket:
-                logger.debug("Handling websocket. Timeouts disabled.")
-                return
-            elif (
-                stage in (Stage.HANDLER, Stage.RESPONSE, Stage.FAILED)
-                and duration > self.response_timeout
-            ):
-                logger.debug("Response Timeout. Closing connection.")
-                self._http.exception = ServiceUnavailable("Response Timeout")
-            else:
-                interval = (
-                    min(
-                        self.keep_alive_timeout,
-                        self.request_timeout,
-                        self.response_timeout,
-                    )
-                    / 2
-                )
-                self.loop.call_later(max(0.1, interval), self.check_timeouts)
-                return
-            self._task.cancel()
-        except Exception:
-            error_logger.exception("protocol.check_timeouts")
-
-    async def send(self, data):
-        """
-        Writes data with backpressure control.
-        """
-        await self._can_write.wait()
-        if self.transport.is_closing():
-            raise CancelledError
-        self.transport.write(data)
-        self._time = current_time()
-
-    def close_if_idle(self) -> bool:
-        """
-        Close the connection if a request is not being sent or received
-
-        :return: boolean - True if closed, false if staying open
-        """
-        if self._http is None or self._http.stage is Stage.IDLE:
-            self.close()
-            return True
-        return False
-
-    def close(self):
-        """
-        Force close the connection.
-        """
-        # Cause a call to connection_lost where further cleanup occurs
-        if self.transport:
-            self.transport.close()
-            self.transport = None
-
-    # -------------------------------------------- #
-    # Only asyncio.Protocol callbacks below this
-    # -------------------------------------------- #
-
-    def connection_made(self, transport):
-        try:
-            # TODO: Benchmark to find suitable write buffer limits
-            transport.set_write_buffer_limits(low=16384, high=65536)
-            self.connections.add(self)
-            self.transport = transport
-            self._task = self.loop.create_task(self.connection_task())
-            self.recv_buffer = bytearray()
-            self.conn_info = ConnInfo(self.transport, unix=self._unix)
-        except Exception:
-            error_logger.exception("protocol.connect_made")
-
-    def connection_lost(self, exc):
-        try:
-            self.connections.discard(self)
-            self.resume_writing()
-            if self._task:
-                self._task.cancel()
-        except Exception:
-            error_logger.exception("protocol.connection_lost")
-
-    def pause_writing(self):
-        self._can_write.clear()
-
-    def resume_writing(self):
-        self._can_write.set()
-
-    def data_received(self, data: bytes):
-        try:
-            self._time = current_time()
-            if not data:
-                return self.close()
-            self.recv_buffer += data
-
-            if (
-                len(self.recv_buffer) > self.app.config.REQUEST_BUFFER_SIZE
-                and self.transport
-            ):
-                self.transport.pause_reading()
-
-            if self._data_received:
-                self._data_received.set()
-        except Exception:
-            error_logger.exception("protocol.data_received")
-
-
-def trigger_events(events: Optional[Iterable[Callable[..., Any]]], loop):
-    """
-    Trigger event callbacks (functions or async)
-
-    :param events: one or more sync or async functions to execute
-    :param loop: event loop
-    """
-    if events:
-        for event in events:
-            result = event(loop)
-            if isawaitable(result):
-                loop.run_until_complete(result)
-
-
-class AsyncioServer:
-    """
-    Wraps an asyncio server with functionality that might be useful to
-    a user who needs to manage the server lifecycle manually.
-    """
-
-    __slots__ = (
-        "loop",
-        "serve_coro",
-        "_after_start",
-        "_before_stop",
-        "_after_stop",
-        "server",
-        "connections",
-    )
-
-    def __init__(
-        self,
-        loop,
-        serve_coro,
-        connections,
-        after_start: Optional[Iterable[ListenerType]],
-        before_stop: Optional[Iterable[ListenerType]],
-        after_stop: Optional[Iterable[ListenerType]],
-    ):
-        # Note, Sanic already called "before_server_start" events
-        # before this helper was even created. So we don't need it here.
-        self.loop = loop
-        self.serve_coro = serve_coro
-        self._after_start = after_start
-        self._before_stop = before_stop
-        self._after_stop = after_stop
-        self.server = None
-        self.connections = connections
-
-    def after_start(self):
-        """
-        Trigger "after_server_start" events
-        """
-        trigger_events(self._after_start, self.loop)
-
-    def before_stop(self):
-        """
-        Trigger "before_server_stop" events
-        """
-        trigger_events(self._before_stop, self.loop)
-
-    def after_stop(self):
-        """
-        Trigger "after_server_stop" events
-        """
-        trigger_events(self._after_stop, self.loop)
-
-    def is_serving(self) -> bool:
-        if self.server:
-            return self.server.is_serving()
-        return False
-
-    def wait_closed(self):
-        if self.server:
-            return self.server.wait_closed()
-
-    def close(self):
-        if self.server:
-            self.server.close()
-            coro = self.wait_closed()
-            task = asyncio.ensure_future(coro, loop=self.loop)
-            return task
-
-    def start_serving(self):
-        if self.server:
-            try:
-                return self.server.start_serving()
-            except AttributeError:
-                raise NotImplementedError(
-                    "server.start_serving not available in this version "
-                    "of asyncio or uvloop."
-                )
-
-    def serve_forever(self):
-        if self.server:
-            try:
-                return self.server.serve_forever()
-            except AttributeError:
-                raise NotImplementedError(
-                    "server.serve_forever not available in this version "
-                    "of asyncio or uvloop."
-                )
-
-    def __await__(self):
-        """
-        Starts the asyncio server, returns AsyncServerCoro
-        """
-        task = asyncio.ensure_future(self.serve_coro)
-        while not task.done():
-            yield
-        self.server = task.result()
-        return self
-
-
-def serve(
-    host,
-    port,
-    app,
-    before_start: Optional[Iterable[ListenerType]] = None,
-    after_start: Optional[Iterable[ListenerType]] = None,
-    before_stop: Optional[Iterable[ListenerType]] = None,
-    after_stop: Optional[Iterable[ListenerType]] = None,
-    ssl: Optional[SSLContext] = None,
-    sock: Optional[socket.socket] = None,
-    unix: Optional[str] = None,
-    reuse_port: bool = False,
-    loop=None,
-    protocol: Type[asyncio.Protocol] = HttpProtocol,
-    backlog: int = 100,
-    register_sys_signals: bool = True,
-    run_multiple: bool = False,
-    run_async: bool = False,
-    connections=None,
-    signal=Signal(),
-    state=None,
-    asyncio_server_kwargs=None,
-):
-    """Start asynchronous HTTP Server on an individual process.
-
-    :param host: Address to host on
-    :param port: Port to host on
-    :param before_start: function to be executed before the server starts
-                         listening. Takes arguments `app` instance and `loop`
-    :param after_start: function to be executed after the server starts
-                        listening. Takes  arguments `app` instance and `loop`
-    :param before_stop: function to be executed when a stop signal is
-                        received before it is respected. Takes arguments
-                        `app` instance and `loop`
-    :param after_stop: function to be executed when a stop signal is
-                       received after it is respected. Takes arguments
-                       `app` instance and `loop`
-    :param ssl: SSLContext
-    :param sock: Socket for the server to accept connections from
-    :param unix: Unix socket to listen on instead of TCP port
-    :param reuse_port: `True` for multiple workers
-    :param loop: asyncio compatible event loop
-    :param run_async: bool: Do not create a new event loop for the server,
-                      and return an AsyncServer object rather than running it
-    :param asyncio_server_kwargs: key-value args for asyncio/uvloop
-                                  create_server method
-    :return: Nothing
-    """
-    if not run_async and not loop:
-        # create new event_loop after fork
-        loop = asyncio.new_event_loop()
-        asyncio.set_event_loop(loop)
-
-    if app.debug:
-        loop.set_debug(app.debug)
-
-    app.asgi = False
-
-    connections = connections if connections is not None else set()
-    protocol_kwargs = _build_protocol_kwargs(protocol, app.config)
-    server = partial(
-        protocol,
-        loop=loop,
-        connections=connections,
-        signal=signal,
-        app=app,
-        state=state,
-        unix=unix,
-        **protocol_kwargs,
-    )
-    asyncio_server_kwargs = (
-        asyncio_server_kwargs if asyncio_server_kwargs else {}
-    )
-    # UNIX sockets are always bound by us (to preserve semantics between modes)
-    if unix:
-        sock = bind_unix_socket(unix, backlog=backlog)
-    server_coroutine = loop.create_server(
-        server,
-        None if sock else host,
-        None if sock else port,
-        ssl=ssl,
-        reuse_port=reuse_port,
-        sock=sock,
-        backlog=backlog,
-        **asyncio_server_kwargs,
-    )
-
-    if run_async:
-        return AsyncioServer(
-            loop=loop,
-            serve_coro=server_coroutine,
-            connections=connections,
-            after_start=after_start,
-            before_stop=before_stop,
-            after_stop=after_stop,
-        )
-
-    trigger_events(before_start, loop)
-
-    try:
-        http_server = loop.run_until_complete(server_coroutine)
-    except BaseException:
-        error_logger.exception("Unable to start server")
-        return
-
-    trigger_events(after_start, loop)
-
-    # Ignore SIGINT when run_multiple
-    if run_multiple:
-        signal_func(SIGINT, SIG_IGN)
-
-    # Register signals for graceful termination
-    if register_sys_signals:
-        if OS_IS_WINDOWS:
-            ctrlc_workaround_for_windows(app)
-        else:
-            for _signal in [SIGTERM] if run_multiple else [SIGINT, SIGTERM]:
-                loop.add_signal_handler(_signal, app.stop)
-    pid = os.getpid()
-    try:
-        logger.info("Starting worker [%s]", pid)
-        loop.run_forever()
-    finally:
-        logger.info("Stopping worker [%s]", pid)
-
-        # Run the on_stop function if provided
-        trigger_events(before_stop, loop)
-
-        # Wait for event loop to finish and all connections to drain
-        http_server.close()
-        loop.run_until_complete(http_server.wait_closed())
-
-        # Complete all tasks on the loop
-        signal.stopped = True
-        for connection in connections:
-            connection.close_if_idle()
-
-        # Gracefully shutdown timeout.
-        # We should provide graceful_shutdown_timeout,
-        # instead of letting connection hangs forever.
-        # Let's roughly calcucate time.
-        graceful = app.config.GRACEFUL_SHUTDOWN_TIMEOUT
-        start_shutdown: float = 0
-        while connections and (start_shutdown < graceful):
-            loop.run_until_complete(asyncio.sleep(0.1))
-            start_shutdown = start_shutdown + 0.1
-
-        # Force close non-idle connection after waiting for
-        # graceful_shutdown_timeout
-        coros = []
-        for conn in connections:
-            if hasattr(conn, "websocket") and conn.websocket:
-                coros.append(conn.websocket.close_connection())
-            else:
-                conn.close()
-
-        _shutdown = asyncio.gather(*coros)
-        loop.run_until_complete(_shutdown)
-
-        trigger_events(after_stop, loop)
-
-        remove_unix_socket(unix)
-
-
-def _build_protocol_kwargs(
-    protocol: Type[asyncio.Protocol], config: Config
-) -> Dict[str, Union[int, float]]:
-    if hasattr(protocol, "websocket_handshake"):
-        return {
-            "websocket_max_size": config.WEBSOCKET_MAX_SIZE,
-            "websocket_max_queue": config.WEBSOCKET_MAX_QUEUE,
-            "websocket_read_limit": config.WEBSOCKET_READ_LIMIT,
-            "websocket_write_limit": config.WEBSOCKET_WRITE_LIMIT,
-            "websocket_ping_timeout": config.WEBSOCKET_PING_TIMEOUT,
-            "websocket_ping_interval": config.WEBSOCKET_PING_INTERVAL,
-        }
-    return {}
-
-
-def bind_socket(host: str, port: int, *, backlog=100) -> socket.socket:
-    """Create TCP server socket.
-    :param host: IPv4, IPv6 or hostname may be specified
-    :param port: TCP port number
-    :param backlog: Maximum number of connections to queue
-    :return: socket.socket object
-    """
-    try:  # IP address: family must be specified for IPv6 at least
-        ip = ip_address(host)
-        host = str(ip)
-        sock = socket.socket(
-            socket.AF_INET6 if ip.version == 6 else socket.AF_INET
-        )
-    except ValueError:  # Hostname, may become AF_INET or AF_INET6
-        sock = socket.socket()
-    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-    sock.bind((host, port))
-    sock.listen(backlog)
-    return sock
-
-
-def bind_unix_socket(path: str, *, mode=0o666, backlog=100) -> socket.socket:
-    """Create unix socket.
-    :param path: filesystem path
-    :param backlog: Maximum number of connections to queue
-    :return: socket.socket object
-    """
-    """Open or atomically replace existing socket with zero downtime."""
-    # Sanitise and pre-verify socket path
-    path = os.path.abspath(path)
-    folder = os.path.dirname(path)
-    if not os.path.isdir(folder):
-        raise FileNotFoundError(f"Socket folder does not exist: {folder}")
-    try:
-        if not stat.S_ISSOCK(os.stat(path, follow_symlinks=False).st_mode):
-            raise FileExistsError(f"Existing file is not a socket: {path}")
-    except FileNotFoundError:
-        pass
-    # Create new socket with a random temporary name
-    tmp_path = f"{path}.{secrets.token_urlsafe()}"
-    sock = socket.socket(socket.AF_UNIX)
-    try:
-        # Critical section begins (filename races)
-        sock.bind(tmp_path)
-        try:
-            os.chmod(tmp_path, mode)
-            # Start listening before rename to avoid connection failures
-            sock.listen(backlog)
-            os.rename(tmp_path, path)
-        except:  # noqa: E722
-            try:
-                os.unlink(tmp_path)
-            finally:
-                raise
-    except:  # noqa: E722
-        try:
-            sock.close()
-        finally:
-            raise
-    return sock
-
-
-def remove_unix_socket(path: Optional[str]) -> None:
-    """Remove dead unix socket during server exit."""
-    if not path:
-        return
-    try:
-        if stat.S_ISSOCK(os.stat(path, follow_symlinks=False).st_mode):
-            # Is it actually dead (doesn't belong to a new server instance)?
-            with socket.socket(socket.AF_UNIX) as testsock:
-                try:
-                    testsock.connect(path)
-                except ConnectionRefusedError:
-                    os.unlink(path)
-    except FileNotFoundError:
-        pass
-
-
-def serve_single(server_settings):
-    main_start = server_settings.pop("main_start", None)
-    main_stop = server_settings.pop("main_stop", None)
-
-    if not server_settings.get("run_async"):
-        # create new event_loop after fork
-        loop = asyncio.new_event_loop()
-        asyncio.set_event_loop(loop)
-        server_settings["loop"] = loop
-
-    trigger_events(main_start, server_settings["loop"])
-    serve(**server_settings)
-    trigger_events(main_stop, server_settings["loop"])
-
-    server_settings["loop"].close()
-
-
-def serve_multiple(server_settings, workers):
-    """Start multiple server processes simultaneously.  Stop on interrupt
-    and terminate signals, and drain connections when complete.
-
-    :param server_settings: kw arguments to be passed to the serve function
-    :param workers: number of workers to launch
-    :param stop_event: if provided, is used as a stop signal
-    :return:
-    """
-    server_settings["reuse_port"] = True
-    server_settings["run_multiple"] = True
-
-    main_start = server_settings.pop("main_start", None)
-    main_stop = server_settings.pop("main_stop", None)
-    loop = asyncio.new_event_loop()
-    asyncio.set_event_loop(loop)
-
-    trigger_events(main_start, loop)
-
-    # Create a listening socket or use the one in settings
-    sock = server_settings.get("sock")
-    unix = server_settings["unix"]
-    backlog = server_settings["backlog"]
-    if unix:
-        sock = bind_unix_socket(unix, backlog=backlog)
-        server_settings["unix"] = unix
-    if sock is None:
-        sock = bind_socket(
-            server_settings["host"], server_settings["port"], backlog=backlog
-        )
-        sock.set_inheritable(True)
-        server_settings["sock"] = sock
-        server_settings["host"] = None
-        server_settings["port"] = None
-
-    processes = []
-
-    def sig_handler(signal, frame):
-        logger.info("Received signal %s. Shutting down.", Signals(signal).name)
-        for process in processes:
-            os.kill(process.pid, SIGTERM)
-
-    signal_func(SIGINT, lambda s, f: sig_handler(s, f))
-    signal_func(SIGTERM, lambda s, f: sig_handler(s, f))
-    mp = multiprocessing.get_context("fork")
-
-    for _ in range(workers):
-        process = mp.Process(target=serve, kwargs=server_settings)
-        process.daemon = True
-        process.start()
-        processes.append(process)
-
-    for process in processes:
-        process.join()
-
-    # the above processes will block this until they're stopped
-    for process in processes:
-        process.terminate()
-
-    trigger_events(main_stop, loop)
-
-    sock.close()
-    loop.close()
-    remove_unix_socket(unix)

sanic/server/__init__.py

@@ -0,0 +1,17 @@
+from sanic.models.server_types import ConnInfo, Signal
+from sanic.server.async_server import AsyncioServer
+from sanic.server.loop import try_use_uvloop
+from sanic.server.protocols.http_protocol import HttpProtocol
+from sanic.server.runners import serve, serve_multiple, serve_single
+
+
+__all__ = (
+    "AsyncioServer",
+    "ConnInfo",
+    "HttpProtocol",
+    "Signal",
+    "serve",
+    "serve_multiple",
+    "serve_single",
+    "try_use_uvloop",
+)

sanic/server/async_server.py

@@ -0,0 +1,132 @@
+from __future__ import annotations
+
+import asyncio
+
+from typing import TYPE_CHECKING
+
+from sanic.exceptions import SanicException
+from sanic.log import deprecation
+
+
+if TYPE_CHECKING:
+    from sanic import Sanic
+
+
+class AsyncioServer:
+    """
+    Wraps an asyncio server with functionality that might be useful to
+    a user who needs to manage the server lifecycle manually.
+    """
+
+    __slots__ = ("app", "connections", "loop", "serve_coro", "server")
+
+    def __init__(
+        self,
+        app: Sanic,
+        loop,
+        serve_coro,
+        connections,
+    ):
+        # Note, Sanic already called "before_server_start" events
+        # before this helper was even created. So we don't need it here.
+        self.app = app
+        self.connections = connections
+        self.loop = loop
+        self.serve_coro = serve_coro
+        self.server = None
+
+    @property
+    def init(self):
+        deprecation(
+            "AsyncioServer.init has been deprecated and will be removed "
+            "in v22.6. Use Sanic.state.is_started instead.",
+            22.6,
+        )
+        return self.app.state.is_started
+
+    def startup(self):
+        """
+        Trigger "before_server_start" events
+        """
+        return self.app._startup()
+
+    def before_start(self):
+        """
+        Trigger "before_server_start" events
+        """
+        return self._server_event("init", "before")
+
+    def after_start(self):
+        """
+        Trigger "after_server_start" events
+        """
+        return self._server_event("init", "after")
+
+    def before_stop(self):
+        """
+        Trigger "before_server_stop" events
+        """
+        return self._server_event("shutdown", "before")
+
+    def after_stop(self):
+        """
+        Trigger "after_server_stop" events
+        """
+        return self._server_event("shutdown", "after")
+
+    def is_serving(self) -> bool:
+        if self.server:
+            return self.server.is_serving()
+        return False
+
+    def wait_closed(self):
+        if self.server:
+            return self.server.wait_closed()
+
+    def close(self):
+        if self.server:
+            self.server.close()
+            coro = self.wait_closed()
+            task = asyncio.ensure_future(coro, loop=self.loop)
+            return task
+
+    def start_serving(self):
+        return self._serve(self.server.start_serving)
+
+    def serve_forever(self):
+        return self._serve(self.server.serve_forever)
+
+    def _serve(self, serve_func):
+        if self.server:
+            if not self.app.state.is_started:
+                raise SanicException(
+                    "Cannot run Sanic server without first running "
+                    "await server.startup()"
+                )
+
+            try:
+                return serve_func()
+            except AttributeError:
+                name = serve_func.__name__
+                raise NotImplementedError(
+                    f"server.{name} not available in this version "
+                    "of asyncio or uvloop."
+                )
+
+    def _server_event(self, concern: str, action: str):
+        if not self.app.state.is_started:
+            raise SanicException(
+                "Cannot dispatch server event without "
+                "first running await server.startup()"
+            )
+        return self.app._server_event(concern, action, loop=self.loop)
+
+    def __await__(self):
+        """
+        Starts the asyncio server, returns AsyncServerCoro
+        """
+        task = asyncio.ensure_future(self.serve_coro)
+        while not task.done():
+            yield
+        self.server = task.result()
+        return self

sanic/server/events.py

@@ -0,0 +1,16 @@
+from inspect import isawaitable
+from typing import Any, Callable, Iterable, Optional
+
+
+def trigger_events(events: Optional[Iterable[Callable[..., Any]]], loop):
+    """
+    Trigger event callbacks (functions or async)
+
+    :param events: one or more sync or async functions to execute
+    :param loop: event loop
+    """
+    if events:
+        for event in events:
+            result = event(loop)
+            if isawaitable(result):
+                loop.run_until_complete(result)