1275 lines
44 KiB
Python
1275 lines
44 KiB
Python
import logging
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import logging.config
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import os
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import re
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import warnings
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from asyncio import CancelledError, ensure_future, get_event_loop
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from collections import defaultdict, deque
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from functools import partial
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from inspect import getmodulename, isawaitable, signature, stack
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from ssl import Purpose, create_default_context
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from traceback import format_exc
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from urllib.parse import urlencode, urlunparse
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from sanic import reloader_helpers
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from sanic.config import Config
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from sanic.constants import HTTP_METHODS
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from sanic.exceptions import SanicException, ServerError, URLBuildError
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from sanic.handlers import ErrorHandler
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from sanic.log import LOGGING_CONFIG_DEFAULTS, error_logger, logger
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from sanic.response import HTTPResponse, StreamingHTTPResponse
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from sanic.router import Router
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from sanic.server import HttpProtocol, Signal, serve, serve_multiple
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from sanic.static import register as static_register
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from sanic.testing import SanicTestClient
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from sanic.views import CompositionView
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from sanic.websocket import ConnectionClosed, WebSocketProtocol
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class Sanic:
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def __init__(
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self,
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name=None,
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router=None,
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error_handler=None,
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load_env=True,
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request_class=None,
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strict_slashes=False,
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log_config=None,
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configure_logging=True,
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):
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# Get name from previous stack frame
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if name is None:
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frame_records = stack()[1]
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name = getmodulename(frame_records[1])
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# logging
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if configure_logging:
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logging.config.dictConfig(log_config or LOGGING_CONFIG_DEFAULTS)
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self.name = name
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self.router = router or Router()
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self.request_class = request_class
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self.error_handler = error_handler or ErrorHandler()
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self.config = Config(load_env=load_env)
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self.request_middleware = deque()
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self.response_middleware = deque()
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self.blueprints = {}
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self._blueprint_order = []
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self.configure_logging = configure_logging
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self.debug = None
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self.sock = None
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self.strict_slashes = strict_slashes
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self.listeners = defaultdict(list)
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self.is_running = False
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self.is_request_stream = False
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self.websocket_enabled = False
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self.websocket_tasks = set()
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# Register alternative method names
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self.go_fast = self.run
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@property
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def loop(self):
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"""Synonymous with asyncio.get_event_loop().
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Only supported when using the `app.run` method.
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"""
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if not self.is_running:
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raise SanicException(
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"Loop can only be retrieved after the app has started "
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"running. Not supported with `create_server` function"
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)
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return get_event_loop()
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# -------------------------------------------------------------------- #
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# Registration
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# -------------------------------------------------------------------- #
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def add_task(self, task):
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"""Schedule a task to run later, after the loop has started.
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Different from asyncio.ensure_future in that it does not
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also return a future, and the actual ensure_future call
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is delayed until before server start.
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:param task: future, couroutine or awaitable
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"""
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try:
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if callable(task):
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try:
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self.loop.create_task(task(self))
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except TypeError:
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self.loop.create_task(task())
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else:
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self.loop.create_task(task)
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except SanicException:
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@self.listener("before_server_start")
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def run(app, loop):
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if callable(task):
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try:
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loop.create_task(task(self))
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except TypeError:
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loop.create_task(task())
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else:
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loop.create_task(task)
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# Decorator
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def listener(self, event):
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"""Create a listener from a decorated function.
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:param event: event to listen to
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"""
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def decorator(listener):
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self.listeners[event].append(listener)
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return listener
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return decorator
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def register_listener(self, listener, event):
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"""
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Register the listener for a given event.
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Args:
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listener: callable i.e. setup_db(app, loop)
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event: when to register listener i.e. 'before_server_start'
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Returns: listener
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"""
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return self.listener(event)(listener)
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# Decorator
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def route(
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self,
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uri,
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methods=frozenset({"GET"}),
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host=None,
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strict_slashes=None,
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stream=False,
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version=None,
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name=None,
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):
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"""Decorate a function to be registered as a route
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:param uri: path of the URL
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:param methods: list or tuple of methods allowed
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:param host:
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:param strict_slashes:
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:param stream:
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:param version:
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:param name: user defined route name for url_for
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:return: decorated function
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"""
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# Fix case where the user did not prefix the URL with a /
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# and will probably get confused as to why it's not working
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if not uri.startswith("/"):
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uri = "/" + uri
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if stream:
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self.is_request_stream = True
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if strict_slashes is None:
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strict_slashes = self.strict_slashes
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def response(handler):
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args = [key for key in signature(handler).parameters.keys()]
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if args:
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if stream:
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handler.is_stream = stream
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self.router.add(
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uri=uri,
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methods=methods,
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handler=handler,
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host=host,
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strict_slashes=strict_slashes,
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version=version,
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name=name,
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)
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return handler
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else:
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raise ValueError(
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"Required parameter `request` missing "
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"in the {0}() route?".format(handler.__name__)
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)
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return response
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# Shorthand method decorators
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def get(
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self, uri, host=None, strict_slashes=None, version=None, name=None
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):
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"""
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Add an API URL under the **GET** *HTTP* method
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:param uri: URL to be tagged to **GET** method of *HTTP*
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:param host: Host IP or FQDN for the service to use
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:param strict_slashes: Instruct :class:`Sanic` to check if the request
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URLs need to terminate with a */*
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:param version: API Version
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:param name: Unique name that can be used to identify the Route
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:return: Object decorated with :func:`route` method
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"""
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return self.route(
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uri,
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methods=frozenset({"GET"}),
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host=host,
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strict_slashes=strict_slashes,
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version=version,
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name=name,
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)
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def post(
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self,
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uri,
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host=None,
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strict_slashes=None,
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stream=False,
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version=None,
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name=None,
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):
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"""
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Add an API URL under the **POST** *HTTP* method
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:param uri: URL to be tagged to **POST** method of *HTTP*
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:param host: Host IP or FQDN for the service to use
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:param strict_slashes: Instruct :class:`Sanic` to check if the request
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URLs need to terminate with a */*
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:param version: API Version
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:param name: Unique name that can be used to identify the Route
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:return: Object decorated with :func:`route` method
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"""
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return self.route(
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uri,
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methods=frozenset({"POST"}),
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host=host,
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strict_slashes=strict_slashes,
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stream=stream,
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version=version,
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name=name,
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)
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def put(
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self,
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uri,
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host=None,
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strict_slashes=None,
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stream=False,
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version=None,
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name=None,
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):
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"""
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Add an API URL under the **PUT** *HTTP* method
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:param uri: URL to be tagged to **PUT** method of *HTTP*
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:param host: Host IP or FQDN for the service to use
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:param strict_slashes: Instruct :class:`Sanic` to check if the request
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URLs need to terminate with a */*
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:param version: API Version
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:param name: Unique name that can be used to identify the Route
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:return: Object decorated with :func:`route` method
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"""
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return self.route(
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uri,
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methods=frozenset({"PUT"}),
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host=host,
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strict_slashes=strict_slashes,
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stream=stream,
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version=version,
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name=name,
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)
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def head(
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self, uri, host=None, strict_slashes=None, version=None, name=None
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):
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return self.route(
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uri,
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methods=frozenset({"HEAD"}),
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host=host,
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strict_slashes=strict_slashes,
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version=version,
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name=name,
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)
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def options(
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self, uri, host=None, strict_slashes=None, version=None, name=None
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):
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"""
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Add an API URL under the **OPTIONS** *HTTP* method
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:param uri: URL to be tagged to **OPTIONS** method of *HTTP*
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:param host: Host IP or FQDN for the service to use
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:param strict_slashes: Instruct :class:`Sanic` to check if the request
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URLs need to terminate with a */*
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:param version: API Version
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:param name: Unique name that can be used to identify the Route
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:return: Object decorated with :func:`route` method
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"""
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return self.route(
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uri,
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methods=frozenset({"OPTIONS"}),
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host=host,
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strict_slashes=strict_slashes,
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version=version,
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name=name,
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)
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def patch(
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self,
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uri,
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host=None,
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strict_slashes=None,
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stream=False,
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version=None,
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name=None,
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):
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"""
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Add an API URL under the **DELETE** *HTTP* method
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:param uri: URL to be tagged to **PATCH** method of *HTTP*
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:param host: Host IP or FQDN for the service to use
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:param strict_slashes: Instruct :class:`Sanic` to check if the request
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URLs need to terminate with a */*
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:param version: API Version
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:param name: Unique name that can be used to identify the Route
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:return: Object decorated with :func:`route` method
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"""
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return self.route(
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uri,
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methods=frozenset({"PATCH"}),
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host=host,
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strict_slashes=strict_slashes,
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stream=stream,
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version=version,
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name=name,
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)
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|
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def delete(
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self, uri, host=None, strict_slashes=None, version=None, name=None
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):
|
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"""
|
|
Add an API URL under the **DELETE** *HTTP* method
|
|
|
|
:param uri: URL to be tagged to **DELETE** method of *HTTP*
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:param host: Host IP or FQDN for the service to use
|
|
:param strict_slashes: Instruct :class:`Sanic` to check if the request
|
|
URLs need to terminate with a */*
|
|
:param version: API Version
|
|
:param name: Unique name that can be used to identify the Route
|
|
:return: Object decorated with :func:`route` method
|
|
"""
|
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return self.route(
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uri,
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methods=frozenset({"DELETE"}),
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host=host,
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strict_slashes=strict_slashes,
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|
version=version,
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name=name,
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)
|
|
|
|
def add_route(
|
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self,
|
|
handler,
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uri,
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methods=frozenset({"GET"}),
|
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host=None,
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|
strict_slashes=None,
|
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version=None,
|
|
name=None,
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stream=False,
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):
|
|
"""A helper method to register class instance or
|
|
functions as a handler to the application url
|
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routes.
|
|
|
|
:param handler: function or class instance
|
|
:param uri: path of the URL
|
|
:param methods: list or tuple of methods allowed, these are overridden
|
|
if using a HTTPMethodView
|
|
:param host:
|
|
:param strict_slashes:
|
|
:param version:
|
|
:param name: user defined route name for url_for
|
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:param stream: boolean specifying if the handler is a stream handler
|
|
:return: function or class instance
|
|
"""
|
|
# Handle HTTPMethodView differently
|
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if hasattr(handler, "view_class"):
|
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methods = set()
|
|
|
|
for method in HTTP_METHODS:
|
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_handler = getattr(handler.view_class, method.lower(), None)
|
|
if _handler:
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methods.add(method)
|
|
if hasattr(_handler, "is_stream"):
|
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stream = True
|
|
|
|
# handle composition view differently
|
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if isinstance(handler, CompositionView):
|
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methods = handler.handlers.keys()
|
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for _handler in handler.handlers.values():
|
|
if hasattr(_handler, "is_stream"):
|
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stream = True
|
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break
|
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|
|
if strict_slashes is None:
|
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strict_slashes = self.strict_slashes
|
|
|
|
self.route(
|
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uri=uri,
|
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methods=methods,
|
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host=host,
|
|
strict_slashes=strict_slashes,
|
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stream=stream,
|
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version=version,
|
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name=name,
|
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)(handler)
|
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return handler
|
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|
|
# Decorator
|
|
def websocket(
|
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self, uri, host=None, strict_slashes=None, subprotocols=None, name=None
|
|
):
|
|
"""Decorate a function to be registered as a websocket route
|
|
:param uri: path of the URL
|
|
:param subprotocols: optional list of str with supported subprotocols
|
|
:param host:
|
|
:return: decorated function
|
|
"""
|
|
self.enable_websocket()
|
|
|
|
# Fix case where the user did not prefix the URL with a /
|
|
# and will probably get confused as to why it's not working
|
|
if not uri.startswith("/"):
|
|
uri = "/" + uri
|
|
|
|
if strict_slashes is None:
|
|
strict_slashes = self.strict_slashes
|
|
|
|
def response(handler):
|
|
async def websocket_handler(request, *args, **kwargs):
|
|
request.app = self
|
|
try:
|
|
protocol = request.transport.get_protocol()
|
|
except AttributeError:
|
|
# On Python3.5 the Transport classes in asyncio do not
|
|
# have a get_protocol() method as in uvloop
|
|
protocol = request.transport._protocol
|
|
ws = await protocol.websocket_handshake(request, subprotocols)
|
|
|
|
# schedule the application handler
|
|
# its future is kept in self.websocket_tasks in case it
|
|
# needs to be cancelled due to the server being stopped
|
|
fut = ensure_future(handler(request, ws, *args, **kwargs))
|
|
self.websocket_tasks.add(fut)
|
|
try:
|
|
await fut
|
|
except (CancelledError, ConnectionClosed):
|
|
pass
|
|
finally:
|
|
self.websocket_tasks.remove(fut)
|
|
await ws.close()
|
|
|
|
self.router.add(
|
|
uri=uri,
|
|
handler=websocket_handler,
|
|
methods=frozenset({"GET"}),
|
|
host=host,
|
|
strict_slashes=strict_slashes,
|
|
name=name,
|
|
)
|
|
return handler
|
|
|
|
return response
|
|
|
|
def add_websocket_route(
|
|
self,
|
|
handler,
|
|
uri,
|
|
host=None,
|
|
strict_slashes=None,
|
|
subprotocols=None,
|
|
name=None,
|
|
):
|
|
"""
|
|
A helper method to register a function as a websocket route.
|
|
|
|
:param handler: a callable function or instance of a class
|
|
that can handle the websocket request
|
|
:param host: Host IP or FQDN details
|
|
:param uri: URL path that will be mapped to the websocket
|
|
handler
|
|
:param strict_slashes: If the API endpoint needs to terminate
|
|
with a "/" or not
|
|
:param subprotocols: Subprotocols to be used with websocket
|
|
handshake
|
|
:param name: A unique name assigned to the URL so that it can
|
|
be used with :func:`url_for`
|
|
:return: Objected decorated by :func:`websocket`
|
|
"""
|
|
if strict_slashes is None:
|
|
strict_slashes = self.strict_slashes
|
|
|
|
return self.websocket(
|
|
uri,
|
|
host=host,
|
|
strict_slashes=strict_slashes,
|
|
subprotocols=subprotocols,
|
|
name=name,
|
|
)(handler)
|
|
|
|
def enable_websocket(self, enable=True):
|
|
"""Enable or disable the support for websocket.
|
|
|
|
Websocket is enabled automatically if websocket routes are
|
|
added to the application.
|
|
"""
|
|
if not self.websocket_enabled:
|
|
# if the server is stopped, we want to cancel any ongoing
|
|
# websocket tasks, to allow the server to exit promptly
|
|
@self.listener("before_server_stop")
|
|
def cancel_websocket_tasks(app, loop):
|
|
for task in self.websocket_tasks:
|
|
task.cancel()
|
|
|
|
self.websocket_enabled = enable
|
|
|
|
def remove_route(self, uri, clean_cache=True, host=None):
|
|
"""
|
|
This method provides the app user a mechanism by which an already
|
|
existing route can be removed from the :class:`Sanic` object
|
|
|
|
:param uri: URL Path to be removed from the app
|
|
:param clean_cache: Instruct sanic if it needs to clean up the LRU
|
|
route cache
|
|
:param host: IP address or FQDN specific to the host
|
|
:return: None
|
|
"""
|
|
self.router.remove(uri, clean_cache, host)
|
|
|
|
# Decorator
|
|
def exception(self, *exceptions):
|
|
"""Decorate a function to be registered as a handler for exceptions
|
|
|
|
:param exceptions: exceptions
|
|
:return: decorated function
|
|
"""
|
|
|
|
def response(handler):
|
|
for exception in exceptions:
|
|
if isinstance(exception, (tuple, list)):
|
|
for e in exception:
|
|
self.error_handler.add(e, handler)
|
|
else:
|
|
self.error_handler.add(exception, handler)
|
|
return handler
|
|
|
|
return response
|
|
|
|
def register_middleware(self, middleware, attach_to="request"):
|
|
"""
|
|
Register an application level middleware that will be attached
|
|
to all the API URLs registered under this application.
|
|
|
|
This method is internally invoked by the :func:`middleware`
|
|
decorator provided at the app level.
|
|
|
|
:param middleware: Callback method to be attached to the
|
|
middleware
|
|
:param attach_to: The state at which the middleware needs to be
|
|
invoked in the lifecycle of an *HTTP Request*.
|
|
**request** - Invoke before the request is processed
|
|
**response** - Invoke before the response is returned back
|
|
:return: decorated method
|
|
"""
|
|
if attach_to == "request":
|
|
self.request_middleware.append(middleware)
|
|
if attach_to == "response":
|
|
self.response_middleware.appendleft(middleware)
|
|
return middleware
|
|
|
|
# Decorator
|
|
def middleware(self, middleware_or_request):
|
|
"""
|
|
Decorate and register middleware to be called before a request.
|
|
Can either be called as *@app.middleware* or
|
|
*@app.middleware('request')*
|
|
|
|
:param: middleware_or_request: Optional parameter to use for
|
|
identifying which type of middleware is being registered.
|
|
"""
|
|
# Detect which way this was called, @middleware or @middleware('AT')
|
|
if callable(middleware_or_request):
|
|
return self.register_middleware(middleware_or_request)
|
|
|
|
else:
|
|
return partial(
|
|
self.register_middleware, attach_to=middleware_or_request
|
|
)
|
|
|
|
# Static Files
|
|
def static(
|
|
self,
|
|
uri,
|
|
file_or_directory,
|
|
pattern=r"/?.+",
|
|
use_modified_since=True,
|
|
use_content_range=False,
|
|
stream_large_files=False,
|
|
name="static",
|
|
host=None,
|
|
strict_slashes=None,
|
|
content_type=None,
|
|
):
|
|
"""
|
|
Register a root to serve files from. The input can either be a
|
|
file or a directory. This method will enable an easy and simple way
|
|
to setup the :class:`Route` necessary to serve the static files.
|
|
|
|
:param uri: URL path to be used for serving static content
|
|
:param file_or_directory: Path for the Static file/directory with
|
|
static files
|
|
:param pattern: Regex Pattern identifying the valid static files
|
|
:param use_modified_since: If true, send file modified time, and return
|
|
not modified if the browser's matches the server's
|
|
:param use_content_range: If true, process header for range requests
|
|
and sends the file part that is requested
|
|
:param stream_large_files: If true, use the
|
|
:func:`StreamingHTTPResponse.file_stream` handler rather
|
|
than the :func:`HTTPResponse.file` handler to send the file.
|
|
If this is an integer, this represents the threshold size to
|
|
switch to :func:`StreamingHTTPResponse.file_stream`
|
|
:param name: user defined name used for url_for
|
|
:param host: Host IP or FQDN for the service to use
|
|
:param strict_slashes: Instruct :class:`Sanic` to check if the request
|
|
URLs need to terminate with a */*
|
|
:param content_type: user defined content type for header
|
|
:return: None
|
|
"""
|
|
static_register(
|
|
self,
|
|
uri,
|
|
file_or_directory,
|
|
pattern,
|
|
use_modified_since,
|
|
use_content_range,
|
|
stream_large_files,
|
|
name,
|
|
host,
|
|
strict_slashes,
|
|
content_type,
|
|
)
|
|
|
|
def blueprint(self, blueprint, **options):
|
|
"""Register a blueprint on the application.
|
|
|
|
:param blueprint: Blueprint object or (list, tuple) thereof
|
|
:param options: option dictionary with blueprint defaults
|
|
:return: Nothing
|
|
"""
|
|
if isinstance(blueprint, (list, tuple)):
|
|
for item in blueprint:
|
|
self.blueprint(item, **options)
|
|
return
|
|
if blueprint.name in self.blueprints:
|
|
assert self.blueprints[blueprint.name] is blueprint, (
|
|
'A blueprint with the name "%s" is already registered. '
|
|
"Blueprint names must be unique." % (blueprint.name,)
|
|
)
|
|
else:
|
|
self.blueprints[blueprint.name] = blueprint
|
|
self._blueprint_order.append(blueprint)
|
|
blueprint.register(self, options)
|
|
|
|
def register_blueprint(self, *args, **kwargs):
|
|
"""
|
|
Proxy method provided for invoking the :func:`blueprint` method
|
|
|
|
.. note::
|
|
To be deprecated in 1.0. Use :func:`blueprint` instead.
|
|
|
|
:param args: Blueprint object or (list, tuple) thereof
|
|
:param kwargs: option dictionary with blueprint defaults
|
|
:return: None
|
|
"""
|
|
|
|
if self.debug:
|
|
warnings.simplefilter("default")
|
|
warnings.warn(
|
|
"Use of register_blueprint will be deprecated in "
|
|
"version 1.0. Please use the blueprint method"
|
|
" instead",
|
|
DeprecationWarning,
|
|
)
|
|
return self.blueprint(*args, **kwargs)
|
|
|
|
def url_for(self, view_name: str, **kwargs):
|
|
r"""Build a URL based on a view name and the values provided.
|
|
|
|
In order to build a URL, all request parameters must be supplied as
|
|
keyword arguments, and each parameter must pass the test for the
|
|
specified parameter type. If these conditions are not met, a
|
|
`URLBuildError` will be thrown.
|
|
|
|
Keyword arguments that are not request parameters will be included in
|
|
the output URL's query string.
|
|
|
|
:param view_name: string referencing the view name
|
|
:param \**kwargs: keys and values that are used to build request
|
|
parameters and query string arguments.
|
|
|
|
:return: the built URL
|
|
|
|
Raises:
|
|
URLBuildError
|
|
"""
|
|
# find the route by the supplied view name
|
|
kw = {}
|
|
# special static files url_for
|
|
if view_name == "static":
|
|
kw.update(name=kwargs.pop("name", "static"))
|
|
elif view_name.endswith(".static"): # blueprint.static
|
|
kwargs.pop("name", None)
|
|
kw.update(name=view_name)
|
|
|
|
uri, route = self.router.find_route_by_view_name(view_name, **kw)
|
|
if not (uri and route):
|
|
raise URLBuildError(
|
|
"Endpoint with name `{}` was not found".format(view_name)
|
|
)
|
|
|
|
if view_name == "static" or view_name.endswith(".static"):
|
|
filename = kwargs.pop("filename", None)
|
|
# it's static folder
|
|
if "<file_uri:" in uri:
|
|
folder_ = uri.split("<file_uri:", 1)[0]
|
|
if folder_.endswith("/"):
|
|
folder_ = folder_[:-1]
|
|
|
|
if filename.startswith("/"):
|
|
filename = filename[1:]
|
|
|
|
uri = "{}/{}".format(folder_, filename)
|
|
|
|
if uri != "/" and uri.endswith("/"):
|
|
uri = uri[:-1]
|
|
|
|
out = uri
|
|
|
|
# find all the parameters we will need to build in the URL
|
|
matched_params = re.findall(self.router.parameter_pattern, uri)
|
|
|
|
# _method is only a placeholder now, don't know how to support it
|
|
kwargs.pop("_method", None)
|
|
anchor = kwargs.pop("_anchor", "")
|
|
# _external need SERVER_NAME in config or pass _server arg
|
|
external = kwargs.pop("_external", False)
|
|
scheme = kwargs.pop("_scheme", "")
|
|
if scheme and not external:
|
|
raise ValueError("When specifying _scheme, _external must be True")
|
|
|
|
netloc = kwargs.pop("_server", None)
|
|
if netloc is None and external:
|
|
netloc = self.config.get("SERVER_NAME", "")
|
|
|
|
if external:
|
|
if not scheme:
|
|
if ":" in netloc[:8]:
|
|
scheme = netloc[:8].split(":", 1)[0]
|
|
else:
|
|
scheme = "http"
|
|
|
|
if "://" in netloc[:8]:
|
|
netloc = netloc.split("://", 1)[-1]
|
|
|
|
for match in matched_params:
|
|
name, _type, pattern = self.router.parse_parameter_string(match)
|
|
# we only want to match against each individual parameter
|
|
specific_pattern = "^{}$".format(pattern)
|
|
supplied_param = None
|
|
|
|
if name in kwargs:
|
|
supplied_param = kwargs.get(name)
|
|
del kwargs[name]
|
|
else:
|
|
raise URLBuildError(
|
|
"Required parameter `{}` was not passed to url_for".format(
|
|
name
|
|
)
|
|
)
|
|
|
|
supplied_param = str(supplied_param)
|
|
# determine if the parameter supplied by the caller passes the test
|
|
# in the URL
|
|
passes_pattern = re.match(specific_pattern, supplied_param)
|
|
|
|
if not passes_pattern:
|
|
if _type != str:
|
|
msg = (
|
|
'Value "{}" for parameter `{}` does not '
|
|
"match pattern for type `{}`: {}".format(
|
|
supplied_param, name, _type.__name__, pattern
|
|
)
|
|
)
|
|
else:
|
|
msg = (
|
|
'Value "{}" for parameter `{}` '
|
|
"does not satisfy pattern {}".format(
|
|
supplied_param, name, pattern
|
|
)
|
|
)
|
|
raise URLBuildError(msg)
|
|
|
|
# replace the parameter in the URL with the supplied value
|
|
replacement_regex = "(<{}.*?>)".format(name)
|
|
|
|
out = re.sub(replacement_regex, supplied_param, out)
|
|
|
|
# parse the remainder of the keyword arguments into a querystring
|
|
query_string = urlencode(kwargs, doseq=True) if kwargs else ""
|
|
# scheme://netloc/path;parameters?query#fragment
|
|
out = urlunparse((scheme, netloc, out, "", query_string, anchor))
|
|
|
|
return out
|
|
|
|
# -------------------------------------------------------------------- #
|
|
# Request Handling
|
|
# -------------------------------------------------------------------- #
|
|
|
|
def converted_response_type(self, response):
|
|
"""
|
|
No implementation provided.
|
|
"""
|
|
pass
|
|
|
|
async def handle_request(self, request, write_callback, stream_callback):
|
|
"""Take a request from the HTTP Server and return a response object
|
|
to be sent back The HTTP Server only expects a response object, so
|
|
exception handling must be done here
|
|
|
|
:param request: HTTP Request object
|
|
:param write_callback: Synchronous response function to be
|
|
called with the response as the only argument
|
|
:param stream_callback: Coroutine that handles streaming a
|
|
StreamingHTTPResponse if produced by the handler.
|
|
|
|
:return: Nothing
|
|
"""
|
|
# Define `response` var here to remove warnings about
|
|
# allocation before assignment below.
|
|
response = None
|
|
cancelled = False
|
|
try:
|
|
# -------------------------------------------- #
|
|
# Request Middleware
|
|
# -------------------------------------------- #
|
|
|
|
request.app = self
|
|
response = await self._run_request_middleware(request)
|
|
# No middleware results
|
|
if not response:
|
|
# -------------------------------------------- #
|
|
# Execute Handler
|
|
# -------------------------------------------- #
|
|
|
|
# Fetch handler from router
|
|
handler, args, kwargs, uri = self.router.get(request)
|
|
|
|
request.uri_template = uri
|
|
if handler is None:
|
|
raise ServerError(
|
|
(
|
|
"'None' was returned while requesting a "
|
|
"handler from the router"
|
|
)
|
|
)
|
|
|
|
# Run response handler
|
|
response = handler(request, *args, **kwargs)
|
|
if isawaitable(response):
|
|
response = await response
|
|
except CancelledError:
|
|
# If response handler times out, the server handles the error
|
|
# and cancels the handle_request job.
|
|
# In this case, the transport is already closed and we cannot
|
|
# issue a response.
|
|
response = None
|
|
cancelled = True
|
|
except Exception as e:
|
|
# -------------------------------------------- #
|
|
# Response Generation Failed
|
|
# -------------------------------------------- #
|
|
|
|
try:
|
|
response = self.error_handler.response(request, e)
|
|
if isawaitable(response):
|
|
response = await response
|
|
except Exception as e:
|
|
if isinstance(e, SanicException):
|
|
response = self.error_handler.default(
|
|
request=request, exception=e
|
|
)
|
|
elif self.debug:
|
|
response = HTTPResponse(
|
|
"Error while handling error: {}\nStack: {}".format(
|
|
e, format_exc()
|
|
),
|
|
status=500,
|
|
)
|
|
else:
|
|
response = HTTPResponse(
|
|
"An error occurred while handling an error", status=500
|
|
)
|
|
finally:
|
|
# -------------------------------------------- #
|
|
# Response Middleware
|
|
# -------------------------------------------- #
|
|
# Don't run response middleware if response is None
|
|
if response is not None:
|
|
try:
|
|
response = await self._run_response_middleware(
|
|
request, response
|
|
)
|
|
except CancelledError:
|
|
# Response middleware can timeout too, as above.
|
|
response = None
|
|
cancelled = True
|
|
except BaseException:
|
|
error_logger.exception(
|
|
"Exception occurred in one of response "
|
|
"middleware handlers"
|
|
)
|
|
if cancelled:
|
|
raise CancelledError()
|
|
|
|
# pass the response to the correct callback
|
|
if isinstance(response, StreamingHTTPResponse):
|
|
await stream_callback(response)
|
|
else:
|
|
write_callback(response)
|
|
|
|
# -------------------------------------------------------------------- #
|
|
# Testing
|
|
# -------------------------------------------------------------------- #
|
|
|
|
@property
|
|
def test_client(self):
|
|
return SanicTestClient(self)
|
|
|
|
# -------------------------------------------------------------------- #
|
|
# Execution
|
|
# -------------------------------------------------------------------- #
|
|
|
|
def run(
|
|
self,
|
|
host=None,
|
|
port=None,
|
|
debug=False,
|
|
ssl=None,
|
|
sock=None,
|
|
workers=1,
|
|
protocol=None,
|
|
backlog=100,
|
|
stop_event=None,
|
|
register_sys_signals=True,
|
|
access_log=True,
|
|
**kwargs
|
|
):
|
|
"""Run the HTTP Server and listen until keyboard interrupt or term
|
|
signal. On termination, drain connections before closing.
|
|
|
|
:param host: Address to host on
|
|
:param port: Port to host on
|
|
:param debug: Enables debug output (slows server)
|
|
:param ssl: SSLContext, or location of certificate and key
|
|
for SSL encryption of worker(s)
|
|
:param sock: Socket for the server to accept connections from
|
|
:param workers: Number of processes received before it is respected
|
|
:param backlog: a number of unaccepted connections that the system
|
|
will allow before refusing new connections
|
|
:param stop_event: event to be triggered before stopping the app
|
|
:param register_sys_signals: Register SIG* events
|
|
:param protocol: Subclass of asyncio protocol class
|
|
:return: Nothing
|
|
"""
|
|
if "loop" in kwargs:
|
|
raise TypeError(
|
|
"loop is not a valid argument. To use an existing loop, "
|
|
"change to create_server().\nSee more: "
|
|
"https://sanic.readthedocs.io/en/latest/sanic/deploying.html"
|
|
"#asynchronous-support"
|
|
)
|
|
|
|
# Default auto_reload to false
|
|
auto_reload = False
|
|
# If debug is set, default it to true (unless on windows)
|
|
if debug and os.name == "posix":
|
|
auto_reload = True
|
|
# Allow for overriding either of the defaults
|
|
auto_reload = kwargs.get("auto_reload", auto_reload)
|
|
|
|
if sock is None:
|
|
host, port = host or "127.0.0.1", port or 8000
|
|
|
|
if protocol is None:
|
|
protocol = (
|
|
WebSocketProtocol if self.websocket_enabled else HttpProtocol
|
|
)
|
|
if stop_event is not None:
|
|
if debug:
|
|
warnings.simplefilter("default")
|
|
warnings.warn(
|
|
"stop_event will be removed from future versions.",
|
|
DeprecationWarning,
|
|
)
|
|
# compatibility old access_log params
|
|
self.config.ACCESS_LOG = access_log
|
|
server_settings = self._helper(
|
|
host=host,
|
|
port=port,
|
|
debug=debug,
|
|
ssl=ssl,
|
|
sock=sock,
|
|
workers=workers,
|
|
protocol=protocol,
|
|
backlog=backlog,
|
|
register_sys_signals=register_sys_signals,
|
|
auto_reload=auto_reload,
|
|
)
|
|
|
|
try:
|
|
self.is_running = True
|
|
if workers == 1:
|
|
if auto_reload and os.name != "posix":
|
|
# This condition must be removed after implementing
|
|
# auto reloader for other operating systems.
|
|
raise NotImplementedError
|
|
|
|
if (
|
|
auto_reload
|
|
and os.environ.get("SANIC_SERVER_RUNNING") != "true"
|
|
):
|
|
reloader_helpers.watchdog(2)
|
|
else:
|
|
serve(**server_settings)
|
|
else:
|
|
serve_multiple(server_settings, workers)
|
|
except BaseException:
|
|
error_logger.exception(
|
|
"Experienced exception while trying to serve"
|
|
)
|
|
raise
|
|
finally:
|
|
self.is_running = False
|
|
logger.info("Server Stopped")
|
|
|
|
def stop(self):
|
|
"""This kills the Sanic"""
|
|
get_event_loop().stop()
|
|
|
|
def __call__(self):
|
|
"""gunicorn compatibility"""
|
|
return self
|
|
|
|
async def create_server(
|
|
self,
|
|
host=None,
|
|
port=None,
|
|
debug=False,
|
|
ssl=None,
|
|
sock=None,
|
|
protocol=None,
|
|
backlog=100,
|
|
stop_event=None,
|
|
access_log=True,
|
|
):
|
|
"""
|
|
Asynchronous version of :func:`run`.
|
|
|
|
This method will take care of the operations necessary to invoke
|
|
the *before_start* events via :func:`trigger_events` method invocation
|
|
before starting the *sanic* app in Async mode.
|
|
|
|
.. note::
|
|
This does not support multiprocessing and is not the preferred
|
|
way to run a :class:`Sanic` application.
|
|
"""
|
|
|
|
if sock is None:
|
|
host, port = host or "127.0.0.1", port or 8000
|
|
|
|
if protocol is None:
|
|
protocol = (
|
|
WebSocketProtocol if self.websocket_enabled else HttpProtocol
|
|
)
|
|
if stop_event is not None:
|
|
if debug:
|
|
warnings.simplefilter("default")
|
|
warnings.warn(
|
|
"stop_event will be removed from future versions.",
|
|
DeprecationWarning,
|
|
)
|
|
# compatibility old access_log params
|
|
self.config.ACCESS_LOG = access_log
|
|
server_settings = self._helper(
|
|
host=host,
|
|
port=port,
|
|
debug=debug,
|
|
ssl=ssl,
|
|
sock=sock,
|
|
loop=get_event_loop(),
|
|
protocol=protocol,
|
|
backlog=backlog,
|
|
run_async=True,
|
|
)
|
|
|
|
# Trigger before_start events
|
|
await self.trigger_events(
|
|
server_settings.get("before_start", []),
|
|
server_settings.get("loop"),
|
|
)
|
|
|
|
return await serve(**server_settings)
|
|
|
|
async def trigger_events(self, events, loop):
|
|
"""Trigger events (functions or async)
|
|
:param events: one or more sync or async functions to execute
|
|
:param loop: event loop
|
|
"""
|
|
for event in events:
|
|
result = event(loop)
|
|
if isawaitable(result):
|
|
await result
|
|
|
|
async def _run_request_middleware(self, request):
|
|
# The if improves speed. I don't know why
|
|
if self.request_middleware:
|
|
for middleware in self.request_middleware:
|
|
response = middleware(request)
|
|
if isawaitable(response):
|
|
response = await response
|
|
if response:
|
|
return response
|
|
return None
|
|
|
|
async def _run_response_middleware(self, request, response):
|
|
if self.response_middleware:
|
|
for middleware in self.response_middleware:
|
|
_response = middleware(request, response)
|
|
if isawaitable(_response):
|
|
_response = await _response
|
|
if _response:
|
|
response = _response
|
|
break
|
|
return response
|
|
|
|
def _helper(
|
|
self,
|
|
host=None,
|
|
port=None,
|
|
debug=False,
|
|
ssl=None,
|
|
sock=None,
|
|
workers=1,
|
|
loop=None,
|
|
protocol=HttpProtocol,
|
|
backlog=100,
|
|
stop_event=None,
|
|
register_sys_signals=True,
|
|
run_async=False,
|
|
auto_reload=False,
|
|
):
|
|
"""Helper function used by `run` and `create_server`."""
|
|
if isinstance(ssl, dict):
|
|
# try common aliaseses
|
|
cert = ssl.get("cert") or ssl.get("certificate")
|
|
key = ssl.get("key") or ssl.get("keyfile")
|
|
if cert is None or key is None:
|
|
raise ValueError("SSLContext or certificate and key required.")
|
|
context = create_default_context(purpose=Purpose.CLIENT_AUTH)
|
|
context.load_cert_chain(cert, keyfile=key)
|
|
ssl = context
|
|
if stop_event is not None:
|
|
if debug:
|
|
warnings.simplefilter("default")
|
|
warnings.warn(
|
|
"stop_event will be removed from future versions.",
|
|
DeprecationWarning,
|
|
)
|
|
|
|
self.error_handler.debug = debug
|
|
self.debug = debug
|
|
|
|
server_settings = {
|
|
"protocol": protocol,
|
|
"request_class": self.request_class,
|
|
"is_request_stream": self.is_request_stream,
|
|
"router": self.router,
|
|
"host": host,
|
|
"port": port,
|
|
"sock": sock,
|
|
"ssl": ssl,
|
|
"signal": Signal(),
|
|
"debug": debug,
|
|
"request_handler": self.handle_request,
|
|
"error_handler": self.error_handler,
|
|
"request_timeout": self.config.REQUEST_TIMEOUT,
|
|
"response_timeout": self.config.RESPONSE_TIMEOUT,
|
|
"keep_alive_timeout": self.config.KEEP_ALIVE_TIMEOUT,
|
|
"request_max_size": self.config.REQUEST_MAX_SIZE,
|
|
"request_buffer_queue_size": self.config.REQUEST_BUFFER_QUEUE_SIZE,
|
|
"keep_alive": self.config.KEEP_ALIVE,
|
|
"loop": loop,
|
|
"register_sys_signals": register_sys_signals,
|
|
"backlog": backlog,
|
|
"access_log": self.config.ACCESS_LOG,
|
|
"websocket_max_size": self.config.WEBSOCKET_MAX_SIZE,
|
|
"websocket_max_queue": self.config.WEBSOCKET_MAX_QUEUE,
|
|
"websocket_read_limit": self.config.WEBSOCKET_READ_LIMIT,
|
|
"websocket_write_limit": self.config.WEBSOCKET_WRITE_LIMIT,
|
|
"graceful_shutdown_timeout": self.config.GRACEFUL_SHUTDOWN_TIMEOUT,
|
|
}
|
|
|
|
# -------------------------------------------- #
|
|
# Register start/stop events
|
|
# -------------------------------------------- #
|
|
|
|
for event_name, settings_name, reverse in (
|
|
("before_server_start", "before_start", False),
|
|
("after_server_start", "after_start", False),
|
|
("before_server_stop", "before_stop", True),
|
|
("after_server_stop", "after_stop", True),
|
|
):
|
|
listeners = self.listeners[event_name].copy()
|
|
if reverse:
|
|
listeners.reverse()
|
|
# Prepend sanic to the arguments when listeners are triggered
|
|
listeners = [partial(listener, self) for listener in listeners]
|
|
server_settings[settings_name] = listeners
|
|
|
|
if self.configure_logging and debug:
|
|
logger.setLevel(logging.DEBUG)
|
|
|
|
if (
|
|
self.config.LOGO is not None
|
|
and os.environ.get("SANIC_SERVER_RUNNING") != "true"
|
|
):
|
|
logger.debug(self.config.LOGO)
|
|
|
|
if run_async:
|
|
server_settings["run_async"] = True
|
|
|
|
# Serve
|
|
if host and port and os.environ.get("SANIC_SERVER_RUNNING") != "true":
|
|
proto = "http"
|
|
if ssl is not None:
|
|
proto = "https"
|
|
logger.info("Goin' Fast @ {}://{}:{}".format(proto, host, port))
|
|
|
|
return server_settings
|