Moved to Django's static files handler. (#1890)

* Moved to Django's static files handler.
* Removed staticfiles.py file.
* Added entry in the changelog.

CHANGELOG.txt

@@ -6,7 +6,8 @@ Next Release (will be 4.0)
 
 * Drops support for Python 3.6.
 * Minimum Django version is now Django 3.2.
-* Added compatiblity with Django 4.1.
+* Added compatibility with Django 4.1.
+* Removed deprecated static files handling in favor of ``django.contrib.staticfiles``.
 
 3.0.5 (2022-06-24)
 ------------------

channels/management/commands/runserver.py

@@ -6,14 +6,13 @@
 from daphne.server import Server
 from django.apps import apps
 from django.conf import settings
+from django.contrib.staticfiles.handlers import ASGIStaticFilesHandler
 from django.core.management import CommandError
 from django.core.management.commands.runserver import Command as RunserverCommand
 
 from channels import __version__
 from channels.routing import get_default_application
 
-from ...staticfiles import StaticFilesWrapper
-
 logger = logging.getLogger("django.channels.server")
 
 
@@ -129,7 +128,7 @@ def get_application(self, options):
         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 StaticFilesWrapper(get_default_application())
+            return ASGIStaticFilesHandler(get_default_application())
         else:
             return get_default_application()
 

channels/testing/live.py

@@ -1,11 +1,11 @@
 from daphne.testing import DaphneProcess
+from django.contrib.staticfiles.handlers import ASGIStaticFilesHandler
 from django.core.exceptions import ImproperlyConfigured
 from django.db import connections
 from django.test.testcases import TransactionTestCase
 from django.test.utils import modify_settings
 
 from channels.routing import get_default_application
-from channels.staticfiles import StaticFilesWrapper
 
 
 class ChannelsLiveServerTestCase(TransactionTestCase):
@@ -18,7 +18,7 @@ class ChannelsLiveServerTestCase(TransactionTestCase):
 
     host = "localhost"
     ProtocolServerProcess = DaphneProcess
-    static_wrapper = StaticFilesWrapper
+    static_wrapper = ASGIStaticFilesHandler
     serve_static = True
 
     @property

tests/test_staticfiles.py

@@ -1,8 +1,5 @@
-import os
-
 import pytest
-
-from channels.staticfiles import StaticFilesHandler, StaticFilesWrapper
+from django.contrib.staticfiles.handlers import ASGIStaticFilesHandler
 
 
 @pytest.fixture(autouse=True)
@@ -21,39 +18,16 @@ async def __call__(self, scope, receive, send):
         return self.return_value
 
 
-class MockStaticHandler:
-    async def __call__(self, scope, receive, send):
-        return scope["path"]
-
-
 def request_for_path(path, type="http"):
     return {
         "type": type,
         "path": path,
     }
 
 
-@pytest.mark.asyncio
-@pytest.mark.filterwarnings("ignore::DeprecationWarning")
-async def test_staticfiles_wrapper_serves_static_http_requests(settings):
-    settings.STATIC_URL = "/mystatic/"
-
-    application = MockApplication("application")
-
-    wrapper = StaticFilesWrapper(application, staticfiles_handler=MockStaticHandler)
-
-    scope = request_for_path("/mystatic/image.png")
-    assert (
-        await wrapper(scope, None, None) == "/mystatic/image.png"
-    ), "StaticFilesWrapper should serve paths under the STATIC_URL path"
-    assert (
-        not application.was_called
-    ), "The inner application should not be called when serving static files"
-
-
 @pytest.mark.asyncio
 async def test_staticfiles_wrapper_calls_application_for_non_static_http_requests():
-    wrapper = StaticFilesWrapper(MockApplication("application"))
+    wrapper = ASGIStaticFilesHandler(MockApplication("application"))
 
     non_static_path = request_for_path("/path/to/non/static/resource")
     assert (
@@ -70,7 +44,7 @@ async def test_staticfiles_wrapper_calls_application_for_non_static_http_request
 async def test_staticfiles_wrapper_calls_application_for_non_http_paths(settings):
     settings.STATIC_URL = "/mystatic/"
 
-    wrapper = StaticFilesWrapper(MockApplication("application"))
+    wrapper = ASGIStaticFilesHandler(MockApplication("application"))
 
     non_http_static_path = request_for_path("/mystatic/match", type="websocket")
     assert await wrapper(non_http_static_path, None, None) == "application", (
@@ -83,7 +57,7 @@ async def test_staticfiles_wrapper_calls_application_for_non_http_paths(settings
 async def test_staticfiles_wrapper_calls_application_if_static_url_has_host(settings):
     settings.STATIC_URL = "http://hostname.com/mystatic/"
 
-    wrapper = StaticFilesWrapper(MockApplication("application"))
+    wrapper = ASGIStaticFilesHandler(MockApplication("application"))
 
     scope = request_for_path("/mystatic/match")
     assert await wrapper(scope, None, None) == "application", (
@@ -95,33 +69,9 @@ async def test_staticfiles_wrapper_calls_application_if_static_url_has_host(sett
 def test_is_single_callable():
     from asgiref.compatibility import is_double_callable
 
-    wrapper = StaticFilesWrapper(None)
+    wrapper = ASGIStaticFilesHandler(None)
 
     assert not is_double_callable(wrapper), (
         "StaticFilesWrapper should be recognized as a single callable by "
         "asgiref compatibility tools"
     )
-
-
-@pytest.mark.asyncio
-async def test_staticfiles_handler_can_generate_file_path():
-    """
-    StaticFilesHandler.file_path must not rely on scope being assigned to self.
-    """
-
-    class MockedHandler(StaticFilesHandler):
-        async def __call__(self, scope, receive, send):
-            # Equivalent setUp from real __call__.
-            request = self.request_class(scope, "")
-            self.static_base_url = scope["static_base_url"][2]
-            # Method under test.
-            return self.file_path(request.path)
-
-    wrapper = StaticFilesWrapper(
-        MockApplication("application"), staticfiles_handler=MockedHandler
-    )
-    scope = request_for_path("/static/image.png")
-    scope["method"] = "GET"
-    assert await wrapper(scope, None, None) == os.path.normpath(
-        "/image.png"
-    ), "StaticFilesWrapper should serve paths under the STATIC_URL path"