GIT-2045: enable versioning and strict slash on BlueprintGroup (#2047)

* GIT-2045: enable versioning and strict slash on BlueprintGroup

* GIT-2045: convert named tuple into typed format + unit tests

* GIT-2045: add example code for versioned bpg

* GIT-2045: None value for strict slashes check

* GIT-2045: refactor handler types and add benchmark for urlparse

* GIT-2045: reduce urlparse benchmark iterations

* GIT-2045: add unit test and url merge behavior

* GIT-2045: cleanup example code and remove print

* GIT-2045: add test for slash duplication avoidence

* GIT-2045: fix issue with tailing / getting appended

* GIT-2045: use Optional instead of Union for Typing

* GIT-2045: use string for version arg

* GIT-2045: combine optional with union

sanic/app.py

@@ -40,7 +40,7 @@ from sanic.exceptions import (
     ServerError,
     URLBuildError,
 )
-from sanic.handlers import ErrorHandler, ListenerType, MiddlewareType
+from sanic.handlers import ErrorHandler
 from sanic.log import LOGGING_CONFIG_DEFAULTS, error_logger, logger
 from sanic.mixins.listeners import ListenerEvent
 from sanic.models.futures import (
@@ -50,6 +50,7 @@ from sanic.models.futures import (
     FutureRoute,
     FutureStatic,
 )
+from sanic.models.handler_types import ListenerType, MiddlewareType
 from sanic.request import Request
 from sanic.response import BaseHTTPResponse, HTTPResponse
 from sanic.router import Router

sanic/blueprint_group.py

@@ -1,5 +1,7 @@
 from collections.abc import MutableSequence
-from typing import List
+from typing import List, Optional, Union
+
+import sanic
 
 
 class BlueprintGroup(MutableSequence):
@@ -16,6 +18,11 @@ class BlueprintGroup(MutableSequence):
         bp1 = Blueprint('bp1', url_prefix='/bp1')
         bp2 = Blueprint('bp2', url_prefix='/bp2')
 
+        bp3 = Blueprint('bp3', url_prefix='/bp4')
+        bp3 = Blueprint('bp3', url_prefix='/bp4')
+
+        bpg = BlueprintGroup(bp3, bp4, url_prefix="/api", version="v1")
+
         @bp1.middleware('request')
         async def bp1_only_middleware(request):
             print('applied on Blueprint : bp1 Only')
@@ -28,6 +35,14 @@ class BlueprintGroup(MutableSequence):
         async def bp2_route(request, param):
             return text(param)
 
+        @bp3.route('/')
+        async def bp1_route(request):
+            return text('bp1')
+
+        @bp4.route('/<param>')
+        async def bp2_route(request, param):
+            return text(param)
+
         group = Blueprint.group(bp1, bp2)
 
         @group.middleware('request')
@@ -36,18 +51,23 @@ class BlueprintGroup(MutableSequence):
 
         # Register Blueprint group under the app
         app.blueprint(group)
+        app.blueprint(bpg)
     """
 
-    __slots__ = ("_blueprints", "_url_prefix")
+    __slots__ = ("_blueprints", "_url_prefix", "_version", "_strict_slashes")
 
-    def __init__(self, url_prefix=None):
+    def __init__(self, url_prefix=None, version=None, strict_slashes=None):
         """
         Create a new Blueprint Group
 
         :param url_prefix: URL: to be prefixed before all the Blueprint Prefix
+        :param version: API Version for the blueprint group. This will be inherited by each of the Blueprint
+        :param strict_slashes: URL Strict slash behavior indicator
         """
         self._blueprints = []
         self._url_prefix = url_prefix
+        self._version = version
+        self._strict_slashes = strict_slashes
 
     @property
     def url_prefix(self) -> str:
@@ -59,7 +79,7 @@ class BlueprintGroup(MutableSequence):
         return self._url_prefix
 
     @property
-    def blueprints(self) -> List:
+    def blueprints(self) -> List["sanic.Blueprint"]:
         """
         Retrieve a list of all the available blueprints under this group.
 
@@ -67,6 +87,25 @@ class BlueprintGroup(MutableSequence):
         """
         return self._blueprints
 
+    @property
+    def version(self) -> Optional[Union[str, int, float]]:
+        """
+        API Version for the Blueprint Group. This will be applied only in case if the Blueprint doesn't already have
+        a version specified
+
+        :return: Version information
+        """
+        return self._version
+
+    @property
+    def strict_slashes(self) -> Optional[bool]:
+        """
+        URL Slash termination behavior configuration
+
+        :return: bool
+        """
+        return self._strict_slashes
+
     def __iter__(self):
         """
         Tun the class Blueprint Group into an Iterable item
@@ -121,7 +160,33 @@ class BlueprintGroup(MutableSequence):
         """
         return len(self._blueprints)
 
-    def insert(self, index: int, item: object) -> None:
+    def _sanitize_blueprint(self, bp: "sanic.Blueprint") -> "sanic.Blueprint":
+        """
+        Sanitize the Blueprint Entity to override the Version and strict slash behaviors as required.
+
+        :param bp: Sanic Blueprint entity Object
+        :return: Modified Blueprint
+        """
+        if self._url_prefix:
+            merged_prefix = "/".join(
+                u.strip("/") for u in [self._url_prefix, bp.url_prefix or ""]
+            ).rstrip("/")
+            bp.url_prefix = f"/{merged_prefix}"
+        for _attr in ["version", "strict_slashes"]:
+            if getattr(bp, _attr) is None:
+                setattr(bp, _attr, getattr(self, _attr))
+        return bp
+
+    def append(self, value: "sanic.Blueprint") -> None:
+        """
+        The Abstract class `MutableSequence` leverages this append method to
+        perform the `BlueprintGroup.append` operation.
+        :param value: New `Blueprint` object.
+        :return: None
+        """
+        self._blueprints.append(self._sanitize_blueprint(bp=value))
+
+    def insert(self, index: int, item: "sanic.Blueprint") -> None:
         """
         The Abstract class `MutableSequence` leverages this insert method to
         perform the `BlueprintGroup.append` operation.
@@ -130,7 +195,7 @@ class BlueprintGroup(MutableSequence):
         :param item: New `Blueprint` object.
         :return: None
         """
-        self._blueprints.insert(index, item)
+        self._blueprints.insert(index, self._sanitize_blueprint(item))
 
     def middleware(self, *args, **kwargs):
         """

sanic/blueprints.py

@@ -1,11 +1,15 @@
 from collections import defaultdict
-from typing import Dict, List, Optional
+from typing import Dict, List, Optional, Iterable
 
 from sanic_routing.route import Route  # type: ignore
 
 from sanic.base import BaseSanic
 from sanic.blueprint_group import BlueprintGroup
-from sanic.handlers import ListenerType, MiddlewareType, RouteHandler
+from sanic.models.handler_types import (
+    ListenerType,
+    MiddlewareType,
+    RouteHandler,
+)
 from sanic.models.futures import FutureRoute, FutureStatic
 
 
@@ -87,16 +91,18 @@ class Blueprint(BaseSanic):
         return super().exception(*args, **kwargs)
 
     @staticmethod
-    def group(*blueprints, url_prefix=""):
+    def group(*blueprints, url_prefix="", version=None, strict_slashes=None):
         """
         Create a list of blueprints, optionally grouping them under a
         general URL prefix.
 
         :param blueprints: blueprints to be registered as a group
         :param url_prefix: URL route to be prepended to all sub-prefixes
+        :param version: API Version to be used for Blueprint group
+        :param strict_slashes: Indicate strict slash termination behavior for URL
         """
 
-        def chain(nested):
+        def chain(nested) -> Iterable[Blueprint]:
             """itertools.chain() but leaves strings untouched"""
             for i in nested:
                 if isinstance(i, (list, tuple)):
@@ -106,11 +112,12 @@ class Blueprint(BaseSanic):
                 else:
                     yield i
 
-        bps = BlueprintGroup(url_prefix=url_prefix)
+        bps = BlueprintGroup(
+            url_prefix=url_prefix,
+            version=version,
+            strict_slashes=strict_slashes,
+        )
         for bp in chain(blueprints):
-            if bp.url_prefix is None:
-                bp.url_prefix = ""
-            bp.url_prefix = url_prefix + bp.url_prefix
             bps.append(bp)
         return bps
 

sanic/handlers.py

@@ -1,6 +1,4 @@
-from asyncio.events import AbstractEventLoop
 from traceback import format_exc
-from typing import Any, Callable, Coroutine, Optional, TypeVar, Union
 
 from sanic.errorpages import exception_response
 from sanic.exceptions import (
@@ -9,24 +7,7 @@ from sanic.exceptions import (
     InvalidRangeType,
 )
 from sanic.log import logger
-from sanic.request import Request
-from sanic.response import BaseHTTPResponse, HTTPResponse, text
-
-
-Sanic = TypeVar("Sanic")
-
-MiddlewareResponse = Union[
-    Optional[HTTPResponse], Coroutine[Any, Any, Optional[HTTPResponse]]
-]
-RequestMiddlewareType = Callable[[Request], MiddlewareResponse]
-ResponseMiddlewareType = Callable[
-    [Request, BaseHTTPResponse], MiddlewareResponse
-]
-MiddlewareType = Union[RequestMiddlewareType, ResponseMiddlewareType]
-ListenerType = Callable[
-    [Sanic, AbstractEventLoop], Optional[Coroutine[Any, Any, None]]
-]
-RouteHandler = Callable[..., Coroutine[Any, Any, HTTPResponse]]
+from sanic.response import text
 
 
 class ErrorHandler:

sanic/models/futures.py

@@ -1,39 +1,52 @@
-from collections import namedtuple
+from pathlib import PurePath
+from typing import NamedTuple, List, Union, Iterable, Optional
+
+from sanic.models.handler_types import (
+    ListenerType,
+    MiddlewareType,
+    ErrorMiddlewareType,
+)
 
 
-FutureRoute = namedtuple(
-    "FutureRoute",
-    [
-        "handler",
-        "uri",
-        "methods",
-        "host",
-        "strict_slashes",
-        "stream",
-        "version",
-        "name",
-        "ignore_body",
-        "websocket",
-        "subprotocols",
-        "unquote",
-        "static",
-    ],
-)
-FutureListener = namedtuple("FutureListener", ["listener", "event"])
-FutureMiddleware = namedtuple("FutureMiddleware", ["middleware", "attach_to"])
-FutureException = namedtuple("FutureException", ["handler", "exceptions"])
-FutureStatic = namedtuple(
-    "FutureStatic",
-    [
-        "uri",
-        "file_or_directory",
-        "pattern",
-        "use_modified_since",
-        "use_content_range",
-        "stream_large_files",
-        "name",
-        "host",
-        "strict_slashes",
-        "content_type",
-    ],
-)
+class FutureRoute(NamedTuple):
+    handler: str
+    uri: str
+    methods: Optional[Iterable[str]]
+    host: str
+    strict_slashes: bool
+    stream: bool
+    version: Optional[int]
+    name: str
+    ignore_body: bool
+    websocket: bool
+    subprotocols: Optional[List[str]]
+    unquote: bool
+    static: bool
+
+
+class FutureListener(NamedTuple):
+    listener: ListenerType
+    event: str
+
+
+class FutureMiddleware(NamedTuple):
+    middleware: MiddlewareType
+    attach_to: str
+
+
+class FutureException(NamedTuple):
+    handler: ErrorMiddlewareType
+    exceptions: List[BaseException]
+
+
+class FutureStatic(NamedTuple):
+    uri: str
+    file_or_directory: Union[str, bytes, PurePath]
+    pattern: str
+    use_modified_since: bool
+    use_content_range: bool
+    stream_large_files: bool
+    name: str
+    host: Optional[str]
+    strict_slashes: Optional[bool]
+    content_type: Optional[bool]

sanic/models/handler_types.py

@@ -0,0 +1,25 @@
+from asyncio.events import AbstractEventLoop
+from typing import Any, Callable, Coroutine, Optional, TypeVar, Union
+
+from sanic.request import Request
+from sanic.response import BaseHTTPResponse, HTTPResponse
+
+
+Sanic = TypeVar("Sanic")
+
+
+MiddlewareResponse = Union[
+    Optional[HTTPResponse], Coroutine[Any, Any, Optional[HTTPResponse]]
+]
+RequestMiddlewareType = Callable[[Request], MiddlewareResponse]
+ResponseMiddlewareType = Callable[
+    [Request, BaseHTTPResponse], MiddlewareResponse
+]
+ErrorMiddlewareType = Callable[
+    [Request, BaseException], Optional[Coroutine[Any, Any, None]]
+]
+MiddlewareType = Union[RequestMiddlewareType, ResponseMiddlewareType]
+ListenerType = Callable[
+    [Sanic, AbstractEventLoop], Optional[Coroutine[Any, Any, None]]
+]
+RouteHandler = Callable[..., Coroutine[Any, Any, HTTPResponse]]

sanic/router.py

@@ -10,7 +10,7 @@ from sanic_routing.route import Route  # type: ignore
 
 from sanic.constants import HTTP_METHODS
 from sanic.exceptions import MethodNotSupported, NotFound, SanicException
-from sanic.handlers import RouteHandler
+from sanic.models.handler_types import RouteHandler
 from sanic.request import Request
 
 

sanic/server.py

@@ -12,7 +12,7 @@ from typing import (
     Union,
 )
 
-from sanic.handlers import ListenerType
+from sanic.models.handler_types import ListenerType
 
 
 if TYPE_CHECKING:

sanic/websocket.py

@@ -176,9 +176,7 @@ class WebSocketConnection:
         await self._send(
             {
                 "type": "websocket.accept",
-                "subprotocol": ",".join(
-                    list(self.subprotocols)
-                ),
+                "subprotocol": ",".join(list(self.subprotocols)),
             }
         )