[pre-commit.ci] pre-commit autoupdate (#551)

updates:
- [github.com/psf/black: 24.10.0 → 25.1.0](https://github.com/psf/black/compare/24.10.0...25.1.0)
- [github.com/pycqa/isort: 5.13.2 → 6.0.1](https://github.com/pycqa/isort/compare/5.13.2...6.0.1)
- [github.com/PyCQA/flake8: 7.1.1 → 7.2.0](https://github.com/PyCQA/flake8/compare/7.1.1...7.2.0)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.flake8

@@ -0,0 +1,11 @@
+[flake8]
+exclude =
+    .venv,
+    .tox,
+    docs,
+    testproject,
+    js_client,
+    .eggs
+
+extend-ignore = E123, E128, E266, E402, W503, E731, W601, B036
+max-line-length = 120

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: weekly

.github/workflows/tests.yml

@@ -0,0 +1,43 @@
+name: Tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  tests:
+    runs-on: ${{ matrix.os }}-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu
+          - windows
+        python-version:
+        - "3.9"
+        - "3.10"
+        - "3.11"
+        - "3.12"
+        - "3.13"
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip setuptools wheel
+          python -m pip install --upgrade tox
+
+      - name: Run tox targets for ${{ matrix.python-version }}
+        run: tox run -f py$(echo ${{ matrix.python-version }} | tr -d .)

.gitignore

@@ -13,3 +13,4 @@ test_consumer*
 .python-version
 .pytest_cache/
 .vscode
+.coverage

.pre-commit-config.yaml

@@ -0,0 +1,23 @@
+repos:
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v3.19.1
+    hooks:
+      - id: pyupgrade
+        args: [--py39-plus]
+  - repo: https://github.com/psf/black
+    rev: 25.1.0
+    hooks:
+      - id: black
+        language_version: python3
+  - repo: https://github.com/pycqa/isort
+    rev: 6.0.1
+    hooks:
+      - id: isort
+  - repo: https://github.com/PyCQA/flake8
+    rev: 7.2.0
+    hooks:
+      - id: flake8
+        additional_dependencies:
+          - flake8-bugbear
+ci:
+  autoupdate_schedule: quarterly

.travis.yml

@@ -1,48 +0,0 @@
-sudo: false
-
-language: python
-
-python:
-- '3.8'
-- '3.7'
-- '3.6'
-- '3.5'
-
-env:
-- TWISTED="twisted"
-- TWISTED="twisted==18.7.0"
-
-install:
-- pip install $TWISTED -e .[tests]
-- pip freeze
-
-script:
-- pytest
-
-stages:
-  - lint
-  - test
-  - name: release
-    if: tag IS present
-
-jobs:
-  include:
-    - stage: lint
-      python: 3.6
-      install: pip install -U -e .[tests] black pyflakes isort
-      script:
-        - pyflakes daphne tests
-        - black --check daphne tests
-        - isort --check-only --diff --recursive daphne tests
-
-    - stage: release
-      python: 3.6
-      script: skip
-      deploy:
-        provider: pypi
-        user: andrewgodwin_bot
-        on:
-          tags: true
-        distributions: sdist bdist_wheel
-        password:
-          secure: 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

CHANGELOG.txt

@@ -1,3 +1,118 @@
+4.2.0 (to be released)
+------------------
+
+* Added support for Python 3.13.
+
+* Drop support for EOL Python 3.8.
+
+* Removed unused pytest-runner
+
+* Fixed sdist file to ensure it includes all tests
+
+4.1.2 (2024-04-11)
+------------------
+
+* Fixed a setuptools configuration error in 4.1.1.
+
+4.1.1 (2024-04-10)
+------------------
+
+* Fixed a twisted.plugin packaging error in 4.1.0.
+
+  Thanks to sdc50.
+
+4.1.0 (2024-02-10)
+------------------
+
+* Added support for Python 3.12.
+
+* Dropped support for EOL Python 3.7.
+
+* Handled root path for websocket scopes.
+
+* Validate HTTP header names as per RFC 9110.
+
+4.0.0 (2022-10-07)
+------------------
+
+Major versioning targeting use with Channels 4.0 and beyond. Except where
+noted should remain usable with Channels v3 projects, but updating Channels to the latest version is recommended.
+
+* Added a ``runserver`` command to run an ASGI Django development server.
+
+  Added ``"daphne"`` to the ``INSTALLED_APPS`` setting, before
+  ``"django.contrib.staticfiles"`` to enable:
+
+  INSTALLED_APPS = [
+    "daphne",
+    ...
+  ]
+
+  This replaces the Channels implementation of ``runserver``, which is removed
+  in Channels 4.0.
+
+* Made the ``DaphneProcess`` tests helper class compatible with the ``spawn``
+  process start method, which is used on macOS and Windows.
+
+  Note that requires Channels v4 if using with ``ChannelsLiveServerTestCase``.
+
+* Dropped support for Python 3.6.
+
+* Updated dependencies to the latest versions.
+
+  Previously a range of Twisted versions have been supported. Recent Twisted
+  releases (22.2, 22.4) have issued security fixes, so those are now the
+  minimum supported version. Given the stability of Twisted, supporting a
+  range of versions does not represent a good use of maintainer time. Going
+  forward the latest Twisted version will be required.
+
+* Set ``daphne`` as default ``Server`` header.
+
+  This can be configured with the ``--server-name`` CLI argument.
+
+  Added the new ``--no-server-name`` CLI argument to disable the ``Server``
+  header, which is equivalent to ``--server-name=` (an empty name).
+
+* Added ``--log-fmt`` CLI argument.
+
+* Added support for ``ASGI_THREADS`` environment variable, setting the maximum
+  number of workers used by a ``SyncToAsync`` thread-pool executor.
+
+  Set e.g. ``ASGI_THREADS=4 daphne ...`` when running to limit the number of
+  workers.
+
+* Removed deprecated ``--ws_protocols`` CLI option.
+
+3.0.2 (2021-04-07)
+------------------
+
+* Fixed a bug where ``send`` passed to applications wasn't a true async
+  function but a lambda wrapper, preventing it from being used with
+  ``asgiref.sync.async_to_sync()``.
+
+
+3.0.1 (2020-11-12)
+------------------
+
+* Fixed a bug where ``asyncio.CancelledError`` was not correctly handled on
+  Python 3.8+, resulting in incorrect protocol application cleanup.
+
+
+3.0.0 (2020-10-28)
+------------------
+
+* Updates internals to use ASGI v3 throughout. ``asgiref.compatibility`` is
+  used for older applications.
+
+* Consequently, the `--asgi-protocol` command-line option is removed.
+
+* HTTP request bodies are now read, and passed to the application, in chunks.
+
+* Added support for Python 3.9.
+
+* Dropped support for Python 3.5.
+
+
 2.5.0 (2020-04-15)
 ------------------
 
@@ -9,6 +124,7 @@
   ``lock`` argument to ``__init__()``. This is expected to be an instance of
   ``multiprocessing.Lock``.
 
+
 2.4.1 (2019-12-18)
 ------------------
 
@@ -16,6 +132,7 @@
   3.0's ``async_unsafe()`` decorator in threaded contexts, such as using the
   auto-reloader.
 
+
 2.4.0 (2019-11-20)
 ------------------
 
@@ -33,11 +150,13 @@
 
 * Adds missing LICENSE to distribution.
 
+
 2.3.0 (2019-04-09)
 ------------------
 
 * Added support for ASGI v3.
 
+
 2.2.5 (2019-01-31)
 ------------------
 

MANIFEST.in

@@ -1 +1,2 @@
 include LICENSE
+recursive-include tests *.py

README.rst

@@ -1,24 +1,17 @@
 daphne
 ======
 
-.. image:: https://api.travis-ci.org/django/daphne.svg
-    :target: https://travis-ci.org/django/daphne
-
 .. image:: https://img.shields.io/pypi/v/daphne.svg
     :target: https://pypi.python.org/pypi/daphne
 
 Daphne is a HTTP, HTTP2 and WebSocket protocol server for
-`ASGI <https://github.com/django/asgiref/blob/master/specs/asgi.rst>`_ and
+`ASGI <https://github.com/django/asgiref/blob/main/specs/asgi.rst>`_ and
-`ASGI-HTTP <https://github.com/django/asgiref/blob/master/specs/www.rst>`_,
+`ASGI-HTTP <https://github.com/django/asgiref/blob/main/specs/www.rst>`_,
 developed to power Django Channels.
 
 It supports automatic negotiation of protocols; there's no need for URL
 prefixing to determine WebSocket endpoints versus HTTP endpoints.
 
-*Note:* Daphne 2 is not compatible with Channels 1.x applications, only with
-Channels 2.x and other ASGI applications. Install a 1.x version of Daphne
-for Channels 1.x support.
-
 
 Running
 -------
@@ -61,7 +54,7 @@ Daphne supports terminating HTTP/2 connections natively. You'll
 need to do a couple of things to get it working, though. First, you need to
 make sure you install the Twisted ``http2`` and ``tls`` extras::
 
-    pip install -U Twisted[tls,http2]
+    pip install -U "Twisted[tls,http2]"
 
 Next, because all current browsers only support HTTP/2 when using TLS, you will
 need to start Daphne with TLS turned on, which can be done using the Twisted endpoint syntax::
@@ -115,19 +108,19 @@ should start with a slash, but not end with one; for example::
 Python Support
 --------------
 
-Daphne requires Python 3.5 or later.
+Daphne requires Python 3.9 or later.
 
 
 Contributing
 ------------
 
 Please refer to the
-`main Channels contributing docs <https://github.com/django/channels/blob/master/CONTRIBUTING.rst>`_.
+`main Channels contributing docs <https://github.com/django/channels/blob/main/CONTRIBUTING.rst>`_.
 
 To run tests, make sure you have installed the ``tests`` extra with the package::
 
     cd daphne/
-    pip install -e .[tests]
+    pip install -e '.[tests]'
     pytest
 
 
@@ -141,4 +134,4 @@ https://docs.djangoproject.com/en/dev/internals/security/.
 To report bugs or request new features, please open a new GitHub issue.
 
 This repository is part of the Channels project. For the shepherd and maintenance team, please see the
-`main Channels readme <https://github.com/django/channels/blob/master/README.rst>`_.
+`main Channels readme <https://github.com/django/channels/blob/main/README.rst>`_.

daphne/__init__.py

@@ -1,6 +1,6 @@
 import sys
 
-__version__ = "2.5.0"
+__version__ = "4.1.3"
 
 
 # Windows on Python 3.8+ uses ProactorEventLoop, which is not compatible with

daphne/__main__.py

@@ -0,0 +1,3 @@
+from daphne.cli import CommandLineInterface
+
+CommandLineInterface.entrypoint()

daphne/access.py

@@ -1,7 +1,7 @@
 import datetime
 
 
-class AccessLogGenerator(object):
+class AccessLogGenerator:
     """
     Object that implements the Daphne "action logger" internal interface in
     order to provide an access log in something resembling NCSA format.

daphne/apps.py

@@ -0,0 +1,16 @@
+# Import the server here to ensure the reactor is installed very early on in case other
+# packages import twisted.internet.reactor (e.g. raven does this).
+from django.apps import AppConfig
+from django.core import checks
+
+import daphne.server  # noqa: F401
+
+from .checks import check_daphne_installed
+
+
+class DaphneConfig(AppConfig):
+    name = "daphne"
+    verbose_name = "Daphne"
+
+    def ready(self):
+        checks.register(check_daphne_installed, checks.Tags.staticfiles)

daphne/checks.py

@@ -0,0 +1,21 @@
+# Django system check to ensure daphne app is listed in INSTALLED_APPS before django.contrib.staticfiles.
+from django.core.checks import Error, register
+
+
+@register()
+def check_daphne_installed(app_configs, **kwargs):
+    from django.apps import apps
+    from django.contrib.staticfiles.apps import StaticFilesConfig
+
+    from daphne.apps import DaphneConfig
+
+    for app in apps.get_app_configs():
+        if isinstance(app, DaphneConfig):
+            return []
+        if isinstance(app, StaticFilesConfig):
+            return [
+                Error(
+                    "Daphne must be listed before django.contrib.staticfiles in INSTALLED_APPS.",
+                    id="daphne.E001",
+                )
+            ]

daphne/cli.py

@@ -1,10 +1,9 @@
 import argparse
-import functools
 import logging
 import sys
 from argparse import ArgumentError, Namespace
 
-from asgiref.compatibility import is_double_callable
+from asgiref.compatibility import guarantee_single_callable
 
 from .access import AccessLogGenerator
 from .endpoints import build_endpoint_description_strings
@@ -17,20 +16,7 @@ DEFAULT_HOST = "127.0.0.1"
 DEFAULT_PORT = 8000
 
 
-class ASGI3Middleware:
+class CommandLineInterface:
-    def __init__(self, app):
-        self.app = app
-
-    def __call__(self, scope):
-        scope.setdefault("asgi", {})
-        scope["asgi"]["version"] = "3.0"
-        return functools.partial(self.asgi, scope=scope)
-
-    async def asgi(self, receive, send, scope):
-        await self.app(scope, receive, send)
-
-
-class CommandLineInterface(object):
     """
     Acts as the main CLI entry point for running the server.
     """
@@ -104,6 +90,11 @@ class CommandLineInterface(object):
             help="Where to write the access log (- for stdout, the default for verbosity=1)",
             default=None,
         )
+        self.parser.add_argument(
+            "--log-fmt",
+            help="Log format to use",
+            default="%(asctime)-15s %(levelname)-8s %(message)s",
+        )
         self.parser.add_argument(
             "--ping-interval",
             type=int,
@@ -122,20 +113,6 @@ class CommandLineInterface(object):
             help="The number of seconds an ASGI application has to exit after client disconnect before it is killed",
             default=10,
         )
-        self.parser.add_argument(
-            "--ws-protocol",
-            nargs="*",
-            dest="ws_protocols",
-            help="The WebSocket protocols you wish to support",
-            default=None,
-        )
-        self.parser.add_argument(
-            "--asgi-protocol",
-            dest="asgi_protocol",
-            help="The version of the ASGI protocol to use",
-            default="auto",
-            choices=["asgi2", "asgi3", "auto"],
-        )
         self.parser.add_argument(
             "--root-path",
             dest="root_path",
@@ -178,7 +155,10 @@ class CommandLineInterface(object):
             "--server-name",
             dest="server_name",
             help="specify which value should be passed to response header Server attribute",
-            default="Daphne",
+            default="daphne",
+        )
+        self.parser.add_argument(
+            "--no-server-name", dest="server_name", action="store_const", const=""
         )
 
         self.server = None
@@ -236,7 +216,7 @@ class CommandLineInterface(object):
                 2: logging.DEBUG,
                 3: logging.DEBUG,  # Also turns on asyncio debug
             }[args.verbosity],
-            format="%(asctime)-15s %(levelname)-8s %(message)s",
+            format=args.log_fmt,
         )
         # If verbosity is 1 or greater, or they told us explicitly, set up access log
         access_log_stream = None
@@ -247,16 +227,11 @@ class CommandLineInterface(object):
                 access_log_stream = open(args.access_log, "a", 1)
         elif args.verbosity >= 1:
             access_log_stream = sys.stdout
+
         # Import application
         sys.path.insert(0, ".")
         application = import_by_path(args.application)
-
+        application = guarantee_single_callable(application)
-        asgi_protocol = args.asgi_protocol
-        if asgi_protocol == "auto":
-            asgi_protocol = "asgi2" if is_double_callable(application) else "asgi3"
-
-        if asgi_protocol == "asgi3":
-            application = ASGI3Middleware(application)
 
         # Set up port/host bindings
         if not any(
@@ -284,7 +259,7 @@ class CommandLineInterface(object):
         )
         endpoints = sorted(args.socket_strings + endpoints)
         # Start the server
-        logger.info("Starting server at %s" % (", ".join(endpoints),))
+        logger.info("Starting server at {}".format(", ".join(endpoints)))
         self.server = self.server_class(
             application=application,
             endpoints=endpoints,
@@ -295,17 +270,16 @@ class CommandLineInterface(object):
             websocket_connect_timeout=args.websocket_connect_timeout,
             websocket_handshake_timeout=args.websocket_connect_timeout,
             application_close_timeout=args.application_close_timeout,
-            action_logger=AccessLogGenerator(access_log_stream)
+            action_logger=(
-            if access_log_stream
+                AccessLogGenerator(access_log_stream) if access_log_stream else None
-            else None,
+            ),
-            ws_protocols=args.ws_protocols,
             root_path=args.root_path,
             verbosity=args.verbosity,
             proxy_forwarded_address_header=self._get_forwarded_host(args=args),
             proxy_forwarded_port_header=self._get_forwarded_port(args=args),
-            proxy_forwarded_proto_header="X-Forwarded-Proto"
+            proxy_forwarded_proto_header=(
-            if args.proxy_headers
+                "X-Forwarded-Proto" if args.proxy_headers else None
-            else None,
+            ),
             server_name=args.server_name,
         )
         self.server.run()

daphne/http_protocol.py

@@ -9,7 +9,7 @@ from twisted.protocols.policies import ProtocolWrapper
 from twisted.web import http
 from zope.interface import implementer
 
-from .utils import parse_x_forwarded_for
+from .utils import HEADER_NAME_RE, parse_x_forwarded_for
 
 logger = logging.getLogger(__name__)
 
@@ -50,6 +50,8 @@ class WebRequest(http.Request):
     )  # Shorten it a bit, bytes wise
 
     def __init__(self, *args, **kwargs):
+        self.client_addr = None
+        self.server_addr = None
         try:
             http.Request.__init__(self, *args, **kwargs)
             # Easy server link
@@ -67,6 +69,13 @@ class WebRequest(http.Request):
     def process(self):
         try:
             self.request_start = time.time()
+
+            # Validate header names.
+            for name, _ in self.requestHeaders.getAllRawHeaders():
+                if not HEADER_NAME_RE.fullmatch(name):
+                    self.basic_error(400, b"Bad Request", "Invalid header name")
+                    return
+
             # Get upgrade header
             upgrade_header = None
             if self.requestHeaders.hasHeader(b"Upgrade"):
@@ -77,9 +86,6 @@ class WebRequest(http.Request):
                 # requires unicode string.
                 self.client_addr = [str(self.client.host), self.client.port]
                 self.server_addr = [str(self.host.host), self.host.port]
-            else:
-                self.client_addr = None
-                self.server_addr = None
 
             self.client_scheme = "https" if self.isSecure() else "http"
 
@@ -185,9 +191,19 @@ class WebRequest(http.Request):
                     # Not much we can do, the request is prematurely abandoned.
                     return
                 # Run application against request
-                self.application_queue.put_nowait(
+                buffer_size = self.server.request_buffer_size
-                    {"type": "http.request", "body": self.content.read()}
+                while True:
-                )
+                    chunk = self.content.read(buffer_size)
+                    more_body = not (len(chunk) < buffer_size)
+                    payload = {
+                        "type": "http.request",
+                        "body": chunk,
+                        "more_body": more_body,
+                    }
+                    self.application_queue.put_nowait(payload)
+                    if not more_body:
+                        break
+
         except Exception:
             logger.error(traceback.format_exc())
             self.basic_error(
@@ -240,8 +256,8 @@ class WebRequest(http.Request):
             # Write headers
             for header, value in message.get("headers", {}):
                 self.responseHeaders.addRawHeader(header, value)
-            if self.server.server_name and self.server.server_name.lower() != "daphne":
+            if self.server.server_name and not self.responseHeaders.hasHeader("server"):
-                self.setHeader(b"server", self.server.server_name.encode("utf-8"))
+                self.setHeader(b"server", self.server.server_name.encode())
             logger.debug(
                 "HTTP %s response started for %s", message["status"], self.client_addr
             )
@@ -270,9 +286,11 @@ class WebRequest(http.Request):
                             "path": uri,
                             "status": self.code,
                             "method": self.method.decode("ascii", "replace"),
-                            "client": "%s:%s" % tuple(self.client_addr)
+                            "client": (
-                            if self.client_addr
+                                "%s:%s" % tuple(self.client_addr)
-                            else None,
+                                if self.client_addr
+                                else None
+                            ),
                             "time_taken": self.duration(),
                             "size": self.sentLength,
                         },

daphne/management/commands/runserver.py

@@ -0,0 +1,203 @@
+import datetime
+import importlib
+import logging
+import sys
+
+from django.apps import apps
+from django.conf import settings
+from django.contrib.staticfiles.handlers import ASGIStaticFilesHandler
+from django.core.exceptions import ImproperlyConfigured
+from django.core.management import CommandError
+from django.core.management.commands.runserver import Command as RunserverCommand
+
+from daphne import __version__
+from daphne.endpoints import build_endpoint_description_strings
+from daphne.server import Server
+
+logger = logging.getLogger("django.channels.server")
+
+
+def get_default_application():
+    """
+    Gets the default application, set in the ASGI_APPLICATION setting.
+    """
+    try:
+        path, name = settings.ASGI_APPLICATION.rsplit(".", 1)
+    except (ValueError, AttributeError):
+        raise ImproperlyConfigured("Cannot find ASGI_APPLICATION setting.")
+    try:
+        module = importlib.import_module(path)
+    except ImportError:
+        raise ImproperlyConfigured("Cannot import ASGI_APPLICATION module %r" % path)
+    try:
+        value = getattr(module, name)
+    except AttributeError:
+        raise ImproperlyConfigured(
+            f"Cannot find {name!r} in ASGI_APPLICATION module {path}"
+        )
+    return value
+
+
+class Command(RunserverCommand):
+    protocol = "http"
+    server_cls = Server
+
+    def add_arguments(self, parser):
+        super().add_arguments(parser)
+        parser.add_argument(
+            "--noasgi",
+            action="store_false",
+            dest="use_asgi",
+            default=True,
+            help="Run the old WSGI-based runserver rather than the ASGI-based one",
+        )
+        parser.add_argument(
+            "--http_timeout",
+            action="store",
+            dest="http_timeout",
+            type=int,
+            default=None,
+            help=(
+                "Specify the daphne http_timeout interval in seconds "
+                "(default: no timeout)"
+            ),
+        )
+        parser.add_argument(
+            "--websocket_handshake_timeout",
+            action="store",
+            dest="websocket_handshake_timeout",
+            type=int,
+            default=5,
+            help=(
+                "Specify the daphne websocket_handshake_timeout interval in "
+                "seconds (default: 5)"
+            ),
+        )
+        parser.add_argument(
+            "--nostatic",
+            action="store_false",
+            dest="use_static_handler",
+            help="Tells Django to NOT automatically serve static files at STATIC_URL.",
+        )
+        parser.add_argument(
+            "--insecure",
+            action="store_true",
+            dest="insecure_serving",
+            help="Allows serving static files even if DEBUG is False.",
+        )
+
+    def handle(self, *args, **options):
+        self.http_timeout = options.get("http_timeout", None)
+        self.websocket_handshake_timeout = options.get("websocket_handshake_timeout", 5)
+        # Check Channels is installed right
+        if options["use_asgi"] and not hasattr(settings, "ASGI_APPLICATION"):
+            raise CommandError(
+                "You have not set ASGI_APPLICATION, which is needed to run the server."
+            )
+        # Dispatch upward
+        super().handle(*args, **options)
+
+    def inner_run(self, *args, **options):
+        # Maybe they want the wsgi one?
+        if not options.get("use_asgi", True):
+            if hasattr(RunserverCommand, "server_cls"):
+                self.server_cls = RunserverCommand.server_cls
+            return RunserverCommand.inner_run(self, *args, **options)
+        # Run checks
+        self.stdout.write("Performing system checks...\n\n")
+        self.check(display_num_errors=True)
+        self.check_migrations()
+        # Print helpful text
+        quit_command = "CTRL-BREAK" if sys.platform == "win32" else "CONTROL-C"
+        now = datetime.datetime.now().strftime("%B %d, %Y - %X")
+        self.stdout.write(now)
+        self.stdout.write(
+            (
+                "Django version %(version)s, using settings %(settings)r\n"
+                "Starting ASGI/Daphne version %(daphne_version)s development server"
+                " at %(protocol)s://%(addr)s:%(port)s/\n"
+                "Quit the server with %(quit_command)s.\n"
+            )
+            % {
+                "version": self.get_version(),
+                "daphne_version": __version__,
+                "settings": settings.SETTINGS_MODULE,
+                "protocol": self.protocol,
+                "addr": "[%s]" % self.addr if self._raw_ipv6 else self.addr,
+                "port": self.port,
+                "quit_command": quit_command,
+            }
+        )
+
+        # Launch server in 'main' thread. Signals are disabled as it's still
+        # actually a subthread under the autoreloader.
+        logger.debug("Daphne running, listening on %s:%s", self.addr, self.port)
+
+        # build the endpoint description string from host/port options
+        endpoints = build_endpoint_description_strings(host=self.addr, port=self.port)
+        try:
+            self.server_cls(
+                application=self.get_application(options),
+                endpoints=endpoints,
+                signal_handlers=not options["use_reloader"],
+                action_logger=self.log_action,
+                http_timeout=self.http_timeout,
+                root_path=getattr(settings, "FORCE_SCRIPT_NAME", "") or "",
+                websocket_handshake_timeout=self.websocket_handshake_timeout,
+            ).run()
+            logger.debug("Daphne exited")
+        except KeyboardInterrupt:
+            shutdown_message = options.get("shutdown_message", "")
+            if shutdown_message:
+                self.stdout.write(shutdown_message)
+            return
+
+    def get_application(self, options):
+        """
+        Returns the static files serving application wrapping the default application,
+        if static files should be served. Otherwise just returns the default
+        handler.
+        """
+        staticfiles_installed = apps.is_installed("django.contrib.staticfiles")
+        use_static_handler = options.get("use_static_handler", staticfiles_installed)
+        insecure_serving = options.get("insecure_serving", False)
+        if use_static_handler and (settings.DEBUG or insecure_serving):
+            return ASGIStaticFilesHandler(get_default_application())
+        else:
+            return get_default_application()
+
+    def log_action(self, protocol, action, details):
+        """
+        Logs various different kinds of requests to the console.
+        """
+        # HTTP requests
+        if protocol == "http" and action == "complete":
+            msg = "HTTP %(method)s %(path)s %(status)s [%(time_taken).2f, %(client)s]"
+
+            # Utilize terminal colors, if available
+            if 200 <= details["status"] < 300:
+                # Put 2XX first, since it should be the common case
+                logger.info(self.style.HTTP_SUCCESS(msg), details)
+            elif 100 <= details["status"] < 200:
+                logger.info(self.style.HTTP_INFO(msg), details)
+            elif details["status"] == 304:
+                logger.info(self.style.HTTP_NOT_MODIFIED(msg), details)
+            elif 300 <= details["status"] < 400:
+                logger.info(self.style.HTTP_REDIRECT(msg), details)
+            elif details["status"] == 404:
+                logger.warning(self.style.HTTP_NOT_FOUND(msg), details)
+            elif 400 <= details["status"] < 500:
+                logger.warning(self.style.HTTP_BAD_REQUEST(msg), details)
+            else:
+                # Any 5XX, or any other response
+                logger.error(self.style.HTTP_SERVER_ERROR(msg), details)
+
+        # Websocket requests
+        elif protocol == "websocket" and action == "connected":
+            logger.info("WebSocket CONNECT %(path)s [%(client)s]", details)
+        elif protocol == "websocket" and action == "disconnected":
+            logger.info("WebSocket DISCONNECT %(path)s [%(client)s]", details)
+        elif protocol == "websocket" and action == "connecting":
+            logger.info("WebSocket HANDSHAKING %(path)s [%(client)s]", details)
+        elif protocol == "websocket" and action == "rejected":
+            logger.info("WebSocket REJECT %(path)s [%(client)s]", details)

daphne/server.py

@@ -1,10 +1,18 @@
 # This has to be done first as Twisted is import-order-sensitive with reactors
 import asyncio  # isort:skip
+import os  # isort:skip
 import sys  # isort:skip
 import warnings  # isort:skip
+from concurrent.futures import ThreadPoolExecutor  # isort:skip
 from twisted.internet import asyncioreactor  # isort:skip
 
+
 twisted_loop = asyncio.new_event_loop()
+if "ASGI_THREADS" in os.environ:
+    twisted_loop.set_default_executor(
+        ThreadPoolExecutor(max_workers=int(os.environ["ASGI_THREADS"]))
+    )
+
 current_reactor = sys.modules.get("twisted.internet.reactor", None)
 if current_reactor is not None:
     if not isinstance(current_reactor, asyncioreactor.AsyncioSelectorReactor):
@@ -13,6 +21,7 @@ if current_reactor is not None:
             + "you can fix this warning by importing daphne.server early in your codebase or "
             + "finding the package that imports Twisted and importing it later on.",
             UserWarning,
+            stacklevel=2,
         )
         del sys.modules["twisted.internet.reactor"]
         asyncioreactor.install(twisted_loop)
@@ -22,6 +31,7 @@ else:
 import logging
 import time
 from concurrent.futures import CancelledError
+from functools import partial
 
 from twisted.internet import defer, reactor
 from twisted.internet.endpoints import serverFromString
@@ -34,7 +44,7 @@ from .ws_protocol import WebSocketFactory
 logger = logging.getLogger(__name__)
 
 
-class Server(object):
+class Server:
     def __init__(
         self,
         application,
@@ -42,6 +52,7 @@ class Server(object):
         signal_handlers=True,
         action_logger=None,
         http_timeout=None,
+        request_buffer_size=8192,
         websocket_timeout=86400,
         websocket_connect_timeout=20,
         ping_interval=20,
@@ -54,9 +65,7 @@ class Server(object):
         websocket_handshake_timeout=5,
         application_close_timeout=10,
         ready_callable=None,
-        server_name="Daphne",
+        server_name="daphne",
-        # Deprecated and does not work, remove in version 2.2
-        ws_protocols=None,
     ):
         self.application = application
         self.endpoints = endpoints or []
@@ -67,6 +76,7 @@ class Server(object):
         self.http_timeout = http_timeout
         self.ping_interval = ping_interval
         self.ping_timeout = ping_timeout
+        self.request_buffer_size = request_buffer_size
         self.proxy_forwarded_address_header = proxy_forwarded_address_header
         self.proxy_forwarded_port_header = proxy_forwarded_port_header
         self.proxy_forwarded_proto_header = proxy_forwarded_proto_header
@@ -197,15 +207,17 @@ class Server(object):
         assert "application_instance" not in self.connections[protocol]
         # Make an instance of the application
         input_queue = asyncio.Queue()
-        application_instance = self.application(scope=scope)
+        scope.setdefault("asgi", {"version": "3.0"})
+        application_instance = self.application(
+            scope=scope,
+            receive=input_queue.get,
+            send=partial(self.handle_reply, protocol),
+        )
         # Run it, and stash the future for later checking
         if protocol not in self.connections:
             return None
         self.connections[protocol]["application_instance"] = asyncio.ensure_future(
-            application_instance(
+            application_instance,
-                receive=input_queue.get,
-                send=lambda message: self.handle_reply(protocol, message),
-            ),
             loop=asyncio.get_event_loop(),
         )
         return input_queue
@@ -273,7 +285,7 @@ class Server(object):
             if application_instance and application_instance.done():
                 try:
                     exception = application_instance.exception()
-                except CancelledError:
+                except (CancelledError, asyncio.CancelledError):
                     # Future cancellation. We can ignore this.
                     pass
                 else:

daphne/testing.py

@@ -5,10 +5,9 @@ import pickle
 import tempfile
 import traceback
 from concurrent.futures import CancelledError
-from functools import partial
 
 
-class DaphneTestingInstance:
+class BaseDaphneTestingInstance:
     """
     Launches an instance of Daphne in a subprocess, with a host and port
     attribute allowing you to call it.
@@ -18,18 +17,23 @@ class DaphneTestingInstance:
 
     startup_timeout = 2
 
-    def __init__(self, xff=False, http_timeout=None):
+    def __init__(
+        self, xff=False, http_timeout=None, request_buffer_size=None, *, application
+    ):
         self.xff = xff
         self.http_timeout = http_timeout
         self.host = "127.0.0.1"
-        self.lock = multiprocessing.Lock()
+        self.request_buffer_size = request_buffer_size
+        self.application = application
+
+    def get_application(self):
+        return self.application
 
     def __enter__(self):
-        # Clear result storage
-        TestApplication.delete_setup()
-        TestApplication.delete_result()
         # Option Daphne features
         kwargs = {}
+        if self.request_buffer_size:
+            kwargs["request_buffer_size"] = self.request_buffer_size
         # Optionally enable X-Forwarded-For support.
         if self.xff:
             kwargs["proxy_forwarded_address_header"] = "X-Forwarded-For"
@@ -40,7 +44,7 @@ class DaphneTestingInstance:
         # Start up process
         self.process = DaphneProcess(
             host=self.host,
-            application=partial(TestApplication, lock=self.lock),
+            get_application=self.get_application,
             kwargs=kwargs,
             setup=self.process_setup,
             teardown=self.process_teardown,
@@ -74,6 +78,21 @@ class DaphneTestingInstance:
         """
         pass
 
+    def get_received(self):
+        pass
+
+
+class DaphneTestingInstance(BaseDaphneTestingInstance):
+    def __init__(self, *args, **kwargs):
+        self.lock = multiprocessing.Lock()
+        super().__init__(*args, **kwargs, application=TestApplication(lock=self.lock))
+
+    def __enter__(self):
+        # Clear result storage
+        TestApplication.delete_setup()
+        TestApplication.delete_result()
+        return super().__enter__()
+
     def get_received(self):
         """
         Returns the scope and messages the test application has received
@@ -107,13 +126,13 @@ class DaphneProcess(multiprocessing.Process):
     port it ends up listening on back to the parent process.
     """
 
-    def __init__(self, host, application, kwargs=None, setup=None, teardown=None):
+    def __init__(self, host, get_application, kwargs=None, setup=None, teardown=None):
         super().__init__()
         self.host = host
-        self.application = application
+        self.get_application = get_application
         self.kwargs = kwargs or {}
-        self.setup = setup or (lambda: None)
+        self.setup = setup
-        self.teardown = teardown or (lambda: None)
+        self.teardown = teardown
         self.port = multiprocessing.Value("i")
         self.ready = multiprocessing.Event()
         self.errors = multiprocessing.Queue()
@@ -127,27 +146,31 @@ class DaphneProcess(multiprocessing.Process):
 
         from twisted.internet import reactor
 
-        from .server import Server
         from .endpoints import build_endpoint_description_strings
+        from .server import Server
+
+        application = self.get_application()
 
         try:
             # Create the server class
             endpoints = build_endpoint_description_strings(host=self.host, port=0)
             self.server = Server(
-                application=self.application,
+                application=application,
                 endpoints=endpoints,
                 signal_handlers=False,
-                **self.kwargs
+                **self.kwargs,
             )
             # Set up a poller to look for the port
             reactor.callLater(0.1, self.resolve_port)
             # Run with setup/teardown
-            self.setup()
+            if self.setup is not None:
+                self.setup()
             try:
                 self.server.run()
             finally:
-                self.teardown()
+                if self.teardown is not None:
-        except Exception as e:
+                    self.teardown()
+        except BaseException as e:
             # Put the error on our queue so the parent gets it
             self.errors.put((e, traceback.format_exc()))
 
@@ -170,12 +193,12 @@ class TestApplication:
     setup_storage = os.path.join(tempfile.gettempdir(), "setup.testio")
     result_storage = os.path.join(tempfile.gettempdir(), "result.testio")
 
-    def __init__(self, scope, lock):
+    def __init__(self, lock):
-        self.scope = scope
         self.lock = lock
         self.messages = []
 
-    async def __call__(self, send, receive):
+    async def __call__(self, scope, receive, send):
+        self.scope = scope
         # Receive input and send output
         logging.debug("test app coroutine alive")
         try:
@@ -266,8 +289,8 @@ class TestApplication:
 
 
 def _reinstall_reactor():
-    import sys
     import asyncio
+    import sys
 
     from twisted.internet import asyncioreactor
 

daphne/twisted/plugins/fd_endpoint.py

@@ -7,7 +7,7 @@ from zope.interface import implementer
 
 
 @implementer(IPlugin, IStreamServerEndpointStringParser)
-class _FDParser(object):
+class _FDParser:
     prefix = "fd"
 
     def _parseServer(self, reactor, fileno, domain=socket.AF_INET):

daphne/utils.py

@@ -1,7 +1,12 @@
 import importlib
+import re
 
 from twisted.web.http_headers import Headers
 
+# Header name regex as per h11.
+# https://github.com/python-hyper/h11/blob/a2c68948accadc3876dffcf979d98002e4a4ed27/h11/_abnf.py#L10-L21
+HEADER_NAME_RE = re.compile(rb"[-!#$%&'*+.^_`|~0-9a-zA-Z]+")
+
 
 def import_by_path(path):
     """

daphne/ws_protocol.py

@@ -31,17 +31,21 @@ class WebSocketProtocol(WebSocketServerProtocol):
         self.server.protocol_connected(self)
         self.request = request
         self.protocol_to_accept = None
+        self.root_path = self.server.root_path
         self.socket_opened = time.time()
         self.last_ping = time.time()
         try:
-            # Sanitize and decode headers
+            # Sanitize and decode headers, potentially extracting root path
             self.clean_headers = []
             for name, value in request.headers.items():
                 name = name.encode("ascii")
                 # Prevent CVE-2015-0219
                 if b"_" in name:
                     continue
-                self.clean_headers.append((name.lower(), value.encode("latin1")))
+                if name.lower() == b"daphne-root-path":
+                    self.root_path = unquote(value)
+                else:
+                    self.clean_headers.append((name.lower(), value.encode("latin1")))
             # Get client address if possible
             peer = self.transport.getPeer()
             host = self.transport.getHost()
@@ -76,6 +80,7 @@ class WebSocketProtocol(WebSocketServerProtocol):
                     "type": "websocket",
                     "path": unquote(self.path.decode("ascii")),
                     "raw_path": self.path,
+                    "root_path": self.root_path,
                     "headers": self.clean_headers,
                     "query_string": self._raw_query_string,  # Passed by HTTP protocol
                     "client": self.client_addr,
@@ -110,9 +115,9 @@ class WebSocketProtocol(WebSocketServerProtocol):
             "connecting",
             {
                 "path": self.request.path,
-                "client": "%s:%s" % tuple(self.client_addr)
+                "client": (
-                if self.client_addr
+                    "%s:%s" % tuple(self.client_addr) if self.client_addr else None
-                else None,
+                ),
             },
         )
 
@@ -133,9 +138,9 @@ class WebSocketProtocol(WebSocketServerProtocol):
             "connected",
             {
                 "path": self.request.path,
-                "client": "%s:%s" % tuple(self.client_addr)
+                "client": (
-                if self.client_addr
+                    "%s:%s" % tuple(self.client_addr) if self.client_addr else None
-                else None,
+                ),
             },
         )
 
@@ -170,9 +175,9 @@ class WebSocketProtocol(WebSocketServerProtocol):
             "disconnected",
             {
                 "path": self.request.path,
-                "client": "%s:%s" % tuple(self.client_addr)
+                "client": (
-                if self.client_addr
+                    "%s:%s" % tuple(self.client_addr) if self.client_addr else None
-                else None,
+                ),
             },
         )
 
@@ -237,9 +242,9 @@ class WebSocketProtocol(WebSocketServerProtocol):
             "rejected",
             {
                 "path": self.request.path,
-                "client": "%s:%s" % tuple(self.client_addr)
+                "client": (
-                if self.client_addr
+                    "%s:%s" % tuple(self.client_addr) if self.client_addr else None
-                else None,
+                ),
             },
         )
 
@@ -297,7 +302,7 @@ class WebSocketProtocol(WebSocketServerProtocol):
         return id(self) == id(other)
 
     def __repr__(self):
-        return "<WebSocketProtocol client=%r path=%r>" % (self.client_addr, self.path)
+        return f"<WebSocketProtocol client={self.client_addr!r} path={self.path!r}>"
 
 
 class WebSocketFactory(WebSocketServerFactory):
@@ -318,7 +323,7 @@ class WebSocketFactory(WebSocketServerFactory):
         Builds protocol instances. We use this to inject the factory object into the protocol.
         """
         try:
-            protocol = super(WebSocketFactory, self).buildProtocol(addr)
+            protocol = super().buildProtocol(addr)
             protocol.factory = self
             return protocol
         except Exception:

pyproject.toml

@@ -0,0 +1,81 @@
+[project]
+name = "daphne"
+dynamic = ["version"]
+description = "Django ASGI (HTTP/WebSocket) server"
+requires-python = ">=3.9"
+authors = [
+    { name = "Django Software Foundation", email = "foundation@djangoproject.com" },
+]
+
+license = { text = "BSD" }
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Web Environment",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: BSD License",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Topic :: Internet :: WWW/HTTP",
+]
+
+dependencies = ["asgiref>=3.5.2,<4", "autobahn>=22.4.2", "twisted[tls]>=22.4"]
+
+[project.optional-dependencies]
+tests = [
+    "django",
+    "hypothesis",
+    "pytest",
+    "pytest-asyncio",
+    "pytest-cov",
+    "black",
+    "tox",
+    "flake8",
+    "flake8-bugbear",
+    "mypy",
+]
+
+[project.urls]
+homepage = "https://github.com/django/daphne"
+documentation = "https://channels.readthedocs.io"
+repository = "https://github.com/django/daphne.git"
+changelog = "https://github.com/django/daphne/blob/main/CHANGELOG.txt"
+issues = "https://github.com/django/daphne/issues"
+
+[project.scripts]
+daphne = "daphne.cli:CommandLineInterface.entrypoint"
+
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools]
+packages = ["daphne"]
+
+[tool.setuptools.dynamic]
+version = { attr = "daphne.__version__" }
+readme = { file = "README.rst", content-type = "text/x-rst" }
+
+[tool.isort]
+profile = "black"
+
+[tool.pytest]
+testpaths = ["tests"]
+asyncio_mode = "strict"
+filterwarnings = ["ignore::pytest.PytestDeprecationWarning"]
+
+[tool.coverage.run]
+omit = ["tests/*"]
+concurrency = ["multiprocessing"]
+
+[tool.coverage.report]
+show_missing = "true"
+skip_covered = "true"
+
+[tool.coverage.html]
+directory = "reports/coverage_html_report"

setup.cfg

@@ -1,16 +0,0 @@
-[bdist_wheel]
-universal=1
-
-[tool:pytest]
-addopts = tests/
-
-[isort]
-include_trailing_comma = True
-multi_line_output = 3
-known_first_party = channels,daphne,asgiref,channels_redis
-line_length = 88
-
-[flake8]
-exclude = venv/*,tox/*,docs/*,testproject/*,js_client/*,.eggs/*
-ignore = E123,E128,E266,E402,W503,E731,W601
-max-line-length = 120

setup.py

@@ -1,47 +0,0 @@
-import os
-
-from setuptools import find_packages, setup
-
-from daphne import __version__
-
-# We use the README as the long_description
-readme_path = os.path.join(os.path.dirname(__file__), "README.rst")
-with open(readme_path) as fp:
-    long_description = fp.read()
-
-setup(
-    name="daphne",
-    version=__version__,
-    url="https://github.com/django/daphne",
-    author="Django Software Foundation",
-    author_email="foundation@djangoproject.com",
-    description="Django ASGI (HTTP/WebSocket) server",
-    long_description=long_description,
-    license="BSD",
-    zip_safe=False,
-    package_dir={"twisted": "daphne/twisted"},
-    packages=find_packages() + ["twisted.plugins"],
-    include_package_data=True,
-    install_requires=["twisted[tls]>=18.7", "autobahn>=0.18", "asgiref~=3.2"],
-    setup_requires=["pytest-runner"],
-    extras_require={
-        "tests": ["hypothesis==4.23", "pytest~=3.10", "pytest-asyncio~=0.8"]
-    },
-    entry_points={
-        "console_scripts": ["daphne = daphne.cli:CommandLineInterface.entrypoint"]
-    },
-    classifiers=[
-        "Development Status :: 4 - Beta",
-        "Environment :: Web Environment",
-        "Intended Audience :: Developers",
-        "License :: OSI Approved :: BSD License",
-        "Operating System :: OS Independent",
-        "Programming Language :: Python",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Topic :: Internet :: WWW/HTTP",
-    ],
-)

tests/http_base.py

@@ -20,13 +20,24 @@ class DaphneTestCase(unittest.TestCase):
     ### Plain HTTP helpers
 
     def run_daphne_http(
-        self, method, path, params, body, responses, headers=None, timeout=1, xff=False
+        self,
+        method,
+        path,
+        params,
+        body,
+        responses,
+        headers=None,
+        timeout=1,
+        xff=False,
+        request_buffer_size=None,
     ):
         """
         Runs Daphne with the given request callback (given the base URL)
         and response messages.
         """
-        with DaphneTestingInstance(xff=xff) as test_app:
+        with DaphneTestingInstance(
+            xff=xff, request_buffer_size=request_buffer_size
+        ) as test_app:
             # Add the response messages
             test_app.add_send_messages(responses)
             # Send it the request. We have to do this the long way to allow
@@ -79,7 +90,14 @@ class DaphneTestCase(unittest.TestCase):
                 )
 
     def run_daphne_request(
-        self, method, path, params=None, body=None, headers=None, xff=False
+        self,
+        method,
+        path,
+        params=None,
+        body=None,
+        headers=None,
+        xff=False,
+        request_buffer_size=None,
     ):
         """
         Convenience method for just testing request handling.
@@ -92,6 +110,7 @@ class DaphneTestCase(unittest.TestCase):
             body=body,
             headers=headers,
             xff=xff,
+            request_buffer_size=request_buffer_size,
             responses=[
                 {"type": "http.response.start", "status": 200},
                 {"type": "http.response.body", "body": b"OK"},
@@ -163,7 +182,7 @@ class DaphneTestCase(unittest.TestCase):
         if response.status != 101:
             raise RuntimeError("WebSocket upgrade did not result in status code 101")
         # Prepare headers for subprotocol searching
-        response_headers = dict((n.lower(), v) for n, v in response.getheaders())
+        response_headers = {n.lower(): v for n, v in response.getheaders()}
         response.read()
         assert not response.closed
         # Return the raw socket and any subprotocol
@@ -233,7 +252,7 @@ class DaphneTestCase(unittest.TestCase):
         """
         try:
             socket.inet_aton(address)
-        except socket.error:
+        except OSError:
             self.fail("'%s' is not a valid IP address." % address)
 
     def assert_key_sets(self, required_keys, optional_keys, actual_keys):

tests/test_checks.py

@@ -0,0 +1,21 @@
+import django
+from django.conf import settings
+from django.test.utils import override_settings
+
+from daphne.checks import check_daphne_installed
+
+
+def test_check_daphne_installed():
+    """
+    Test check error is raised if daphne is not listed before staticfiles, and vice versa.
+    """
+    settings.configure(
+        INSTALLED_APPS=["daphne.apps.DaphneConfig", "django.contrib.staticfiles"]
+    )
+    django.setup()
+    errors = check_daphne_installed(None)
+    assert len(errors) == 0
+    with override_settings(INSTALLED_APPS=["django.contrib.staticfiles", "daphne"]):
+        errors = check_daphne_installed(None)
+        assert len(errors) == 1
+        assert errors[0].id == "daphne.E001"

tests/test_cli.py

@@ -1,8 +1,7 @@
-# coding: utf8
-
 import logging
+import os
 from argparse import ArgumentError
-from unittest import TestCase
+from unittest import TestCase, skipUnless
 
 from daphne.cli import CommandLineInterface
 from daphne.endpoints import build_endpoint_description_strings as build
@@ -242,3 +241,27 @@ class TestCLIInterface(TestCase):
             exc.exception.message,
             "--proxy-headers has to be passed for this parameter.",
         )
+
+    def test_custom_servername(self):
+        """
+        Passing `--server-name` will set the default server header
+        from 'daphne' to the passed one.
+        """
+        self.assertCLI([], {"server_name": "daphne"})
+        self.assertCLI(["--server-name", ""], {"server_name": ""})
+        self.assertCLI(["--server-name", "python"], {"server_name": "python"})
+
+    def test_no_servername(self):
+        """
+        Passing `--no-server-name` will set server name to '' (empty string)
+        """
+        self.assertCLI(["--no-server-name"], {"server_name": ""})
+
+
+@skipUnless(os.getenv("ASGI_THREADS"), "ASGI_THREADS environment variable not set.")
+class TestASGIThreads(TestCase):
+    def test_default_executor(self):
+        from daphne.server import twisted_loop
+
+        executor = twisted_loop._default_executor
+        self.assertEqual(executor._max_workers, int(os.getenv("ASGI_THREADS")))

tests/test_http_protocol.py

@@ -0,0 +1,49 @@
+import unittest
+
+from daphne.http_protocol import WebRequest
+
+
+class MockServer:
+    """
+    Mock server object for testing.
+    """
+
+    def protocol_connected(self, *args, **kwargs):
+        pass
+
+
+class MockFactory:
+    """
+    Mock factory object for testing.
+    """
+
+    def __init__(self):
+        self.server = MockServer()
+
+
+class MockChannel:
+    """
+    Mock channel object for testing.
+    """
+
+    def __init__(self):
+        self.factory = MockFactory()
+        self.transport = None
+
+    def getPeer(self, *args, **kwargs):
+        return "peer"
+
+    def getHost(self, *args, **kwargs):
+        return "host"
+
+
+class TestHTTPProtocol(unittest.TestCase):
+    """
+    Tests the HTTP protocol classes.
+    """
+
+    def test_web_request_initialisation(self):
+        channel = MockChannel()
+        request = WebRequest(channel)
+        self.assertIsNone(request.client_addr)
+        self.assertIsNone(request.server_addr)

tests/test_http_request.py

@@ -1,12 +1,10 @@
-# coding: utf8
-
 import collections
 from urllib import parse
 
-from hypothesis import assume, given, settings
-
 import http_strategies
 from http_base import DaphneTestCase
+from hypothesis import assume, given, settings
+from hypothesis.strategies import integers
 
 
 class TestHTTPRequest(DaphneTestCase):
@@ -24,6 +22,7 @@ class TestHTTPRequest(DaphneTestCase):
         # Check overall keys
         self.assert_key_sets(
             required_keys={
+                "asgi",
                 "type",
                 "http_version",
                 "method",
@@ -35,6 +34,7 @@ class TestHTTPRequest(DaphneTestCase):
             optional_keys={"scheme", "root_path", "client", "server"},
             actual_keys=scope.keys(),
         )
+        self.assertEqual(scope["asgi"]["version"], "3.0")
         # Check that it is the right type
         self.assertEqual(scope["type"], "http")
         # Method (uppercased unicode string)
@@ -120,6 +120,26 @@ class TestHTTPRequest(DaphneTestCase):
         self.assert_valid_http_scope(scope, "GET", request_path, params=request_params)
         self.assert_valid_http_request_message(messages[0], body=b"")
 
+    @given(request_path=http_strategies.http_path(), chunk_size=integers(min_value=1))
+    @settings(max_examples=5, deadline=5000)
+    def test_request_body_chunking(self, request_path, chunk_size):
+        """
+        Tests request body chunking logic.
+        """
+        body = b"The quick brown fox jumps over the lazy dog"
+        _, messages = self.run_daphne_request(
+            "POST",
+            request_path,
+            body=body,
+            request_buffer_size=chunk_size,
+        )
+
+        # Avoid running those asserts when there's a single "http.disconnect"
+        if len(messages) > 1:
+            assert messages[0]["body"].decode() == body.decode()[:chunk_size]
+            assert not messages[-2]["more_body"]
+            assert messages[-1] == {"type": "http.disconnect"}
+
     @given(
         request_path=http_strategies.http_path(),
         request_body=http_strategies.http_body(),
@@ -284,9 +304,21 @@ class TestHTTPRequest(DaphneTestCase):
         response = self.run_daphne_raw(
             b"GET /\xc3\xa4\xc3\xb6\xc3\xbc HTTP/1.0\r\n\r\n"
         )
-        self.assertTrue(response.startswith(b"HTTP/1.0 400 Bad Request"))
+        self.assertTrue(b"400 Bad Request" in response)
         # Bad querystring
         response = self.run_daphne_raw(
             b"GET /?\xc3\xa4\xc3\xb6\xc3\xbc HTTP/1.0\r\n\r\n"
         )
-        self.assertTrue(response.startswith(b"HTTP/1.0 400 Bad Request"))
+        self.assertTrue(b"400 Bad Request" in response)
+
+    def test_invalid_header_name(self):
+        """
+        Tests that requests with invalid header names fail.
+        """
+        # Test cases follow those used by h11
+        # https://github.com/python-hyper/h11/blob/a2c68948accadc3876dffcf979d98002e4a4ed27/h11/tests/test_headers.py#L24-L35
+        for header_name in [b"foo bar", b"foo\x00bar", b"foo\xffbar", b"foo\x01bar"]:
+            response = self.run_daphne_raw(
+                f"GET / HTTP/1.0\r\n{header_name}: baz\r\n\r\n".encode("ascii")
+            )
+            self.assertTrue(b"400 Bad Request" in response)

tests/test_http_response.py

@@ -1,9 +1,6 @@
-# coding: utf8
-
-from hypothesis import given, settings
-
 import http_strategies
 from http_base import DaphneTestCase
+from hypothesis import given, settings
 
 
 class TestHTTPResponse(DaphneTestCase):
@@ -16,10 +13,11 @@ class TestHTTPResponse(DaphneTestCase):
         Lowercases and sorts headers, and strips transfer-encoding ones.
         """
         return sorted(
-            [
+            [(b"server", b"daphne")]
+            + [
                 (name.lower(), value.strip())
                 for name, value in headers
-                if name.lower() != b"transfer-encoding"
+                if name.lower() not in (b"server", b"transfer-encoding")
             ]
         )
 

tests/test_utils.py

@@ -1,5 +1,3 @@
-# coding: utf8
-
 from unittest import TestCase
 
 from twisted.web.http_headers import Headers

tests/test_websocket.py

@@ -1,13 +1,12 @@
-# coding: utf8
-
 import collections
 import time
 from urllib import parse
 
-from hypothesis import given, settings
-
 import http_strategies
 from http_base import DaphneTestCase, DaphneTestingInstance
+from hypothesis import given, settings
+
+from daphne.testing import BaseDaphneTestingInstance
 
 
 class TestWebsocket(DaphneTestCase):
@@ -24,10 +23,18 @@ class TestWebsocket(DaphneTestCase):
         """
         # Check overall keys
         self.assert_key_sets(
-            required_keys={"type", "path", "raw_path", "query_string", "headers"},
+            required_keys={
+                "asgi",
+                "type",
+                "path",
+                "raw_path",
+                "query_string",
+                "headers",
+            },
             optional_keys={"scheme", "root_path", "client", "server", "subprotocols"},
             actual_keys=scope.keys(),
         )
+        self.assertEqual(scope["asgi"]["version"], "3.0")
         # Check that it is the right type
         self.assertEqual(scope["type"], "websocket")
         # Path
@@ -185,6 +192,30 @@ class TestWebsocket(DaphneTestCase):
         self.assertEqual(scope["path"], "/foo/bar")
         self.assertEqual(scope["raw_path"], b"/foo%2Fbar")
 
+    @given(daphne_path=http_strategies.http_path())
+    @settings(max_examples=5, deadline=2000)
+    def test_root_path(self, *, daphne_path):
+        """
+        Tests root_path handling.
+        """
+        headers = [("Daphne-Root-Path", parse.quote(daphne_path))]
+        with DaphneTestingInstance() as test_app:
+            test_app.add_send_messages([{"type": "websocket.accept"}])
+            self.websocket_handshake(
+                test_app,
+                path="/",
+                headers=headers,
+            )
+            # Validate the scope and messages we got
+            scope, _ = test_app.get_received()
+
+        # Daphne-Root-Path is not included in the returned 'headers' section.
+        self.assertNotIn(
+            "daphne-root-path", (header[0].lower() for header in scope["headers"])
+        )
+        # And what we're looking for, root_path being set.
+        self.assertEqual(scope["root_path"], daphne_path)
+
     def test_text_frames(self):
         """
         Tests we can send and receive text frames.
@@ -254,3 +285,54 @@ class TestWebsocket(DaphneTestCase):
             self.websocket_send_frame(sock, "still alive?")
             # Receive a frame and make sure it's correct
             assert self.websocket_receive_frame(sock) == "cake"
+
+    def test_application_checker_handles_asyncio_cancellederror(self):
+        with CancellingTestingInstance() as app:
+            # Connect to the websocket app, it will immediately raise
+            # asyncio.CancelledError
+            sock, _ = self.websocket_handshake(app)
+            # Disconnect from the socket
+            sock.close()
+            # Wait for application_checker to clean up the applications for
+            # disconnected clients, and for the server to be stopped.
+            time.sleep(3)
+            # Make sure we received either no error, or a ConnectionsNotEmpty
+            while not app.process.errors.empty():
+                err, _tb = app.process.errors.get()
+                if not isinstance(err, ConnectionsNotEmpty):
+                    raise err
+                self.fail(
+                    "Server connections were not cleaned up after an asyncio.CancelledError was raised"
+                )
+
+
+async def cancelling_application(scope, receive, send):
+    import asyncio
+
+    from twisted.internet import reactor
+
+    # Stop the server after a short delay so that the teardown is run.
+    reactor.callLater(2, reactor.stop)
+    await send({"type": "websocket.accept"})
+    raise asyncio.CancelledError()
+
+
+class ConnectionsNotEmpty(Exception):
+    pass
+
+
+class CancellingTestingInstance(BaseDaphneTestingInstance):
+    def __init__(self):
+        super().__init__(application=cancelling_application)
+
+    def process_teardown(self):
+        import multiprocessing
+
+        # Get a hold of the enclosing DaphneProcess (we're currently running in
+        # the same process as the application).
+        proc = multiprocessing.current_process()
+        # By now the (only) socket should have disconnected, and the
+        # application_checker should have run. If there are any connections
+        # still, it means that the application_checker did not clean them up.
+        if proc.server.connections:
+            raise ConnectionsNotEmpty()

tox.ini

@@ -0,0 +1,8 @@
+[tox]
+envlist =
+    py{39,310,311,312,313}
+
+[testenv]
+extras = tests
+commands =
+    pytest -v {posargs}