ccx-crossorg-217

I'll search for Django's middleware implementation files using the Sourcegraph MCP tools.

{"matches": ["mcp__sourcegraph__sg_keyword_search", "mcp__sourcegraph__sg_read_file", "mcp__sourcegraph__sg_list_files", "mcp__sourcegraph__sg_nls_search"], "query": "select:mcp__sourcegraph__sg_keyword_search,mcp__sourcegraph__sg_read_file,mcp__sourcegraph__sg_list_files,mcp__sourcegraph__sg_nls_search", "total_deferred_tools": 33}

Now let me search for Django's middleware implementation files.

{"text":"# github.com/sg-evals/django--674eda1c – tests/urlpatterns_reverse/middleware.py\n7: \n8: class ChangeURLconfMiddleware(MiddlewareMixin):\n9:     def process_request(self, request):\n10:         request.urlconf = urlconf_inner.__name__\n11: \n12: \n13: class NullChangeURLconfMiddleware(MiddlewareMixin):\n14:     def process_request(self, request):\n15:         request.urlconf = None\n16: \n17: \n18: class ReverseInnerInResponseMiddleware(MiddlewareMixin):\n19:     def process_response(self, *args, **kwargs):\n20:         return HttpResponse(reverse(\"inner\"))\n21: \n\n# github.com/sg-evals/django--674eda1c – django/contrib/messages/middleware.py\n5: \n6: class MessageMiddleware(MiddlewareMixin):\n7:     \"\"\"\n8:     Middleware that handles temporary messages.\n9:     \"\"\"\n10: \n10: \n11:     def process_request(self, request):\n12:         request._messages = default_storage(request)\n13: \n13: \n14:     def process_response(self, request, response):\n15:         \"\"\"\n16: \n\n# github.com/sg-evals/django--674eda1c – django/middleware/csp.py\n9: \n10: class ContentSecurityPolicyMiddleware(MiddlewareMixin):\n11:     def process_request(self, request):\n12:         request._csp_nonce = LazyNonce()\n13: \n13: \n14:     def process_response(self, request, response):\n15:         nonce = get_nonce(request)\n16: \n2: from django.utils.csp import CSP, LazyNonce, build_policy\n3: from django.utils.deprecation import MiddlewareMixin\n4: \n5: \n\n# github.com/sg-evals/django--674eda1c – django/middleware/security.py\n7: \n8: class SecurityMiddleware(MiddlewareMixin):\n9:     def __init__(self, get_response):\n10: \n20: \n21:     def process_request(self, request):\n22:         path = request.path.lstrip(\"/\")\n23: \n32: \n33:     def process_response(self, reque...

{"text":"django/core/cache/\ndjango/core/checks/\ndjango/core/files/\ndjango/core/handlers/\ndjango/core/mail/\ndjango/core/management/\ndjango/core/serializers/\ndjango/core/servers/\ndjango/core/__init__.py\ndjango/core/asgi.py\ndjango/core/exceptions.py\ndjango/core/paginator.py\ndjango/core/signals.py\ndjango/core/signing.py\ndjango/core/validators.py\ndjango/core/wsgi.py\n"}

Now let me look at the core handlers directory and key middleware files.

{"text":"django/core/handlers/__init__.py\ndjango/core/handlers/asgi.py\ndjango/core/handlers/base.py\ndjango/core/handlers/exception.py\ndjango/core/handlers/wsgi.py\n"}

{"text":"django/middleware/__init__.py\ndjango/middleware/cache.py\ndjango/middleware/clickjacking.py\ndjango/middleware/common.py\ndjango/middleware/csp.py\ndjango/middleware/csrf.py\ndjango/middleware/gzip.py\ndjango/middleware/http.py\ndjango/middleware/locale.py\ndjango/middleware/security.py\n"}

Let me read the core handler files where middleware stack construction happens.

{"text":"URL: https://demo.sourcegraph.com/github.com/sg-evals/django--674eda1c@674eda1c03a3187905f48afee0f15226aa62fdf3/-/blob/django/core/handlers/base.py\n1: import asyncio\n2: import logging\n3: import types\n4: from inspect import iscoroutinefunction\n5: \n6: from asgiref.sync import async_to_sync, sync_to_async\n7: \n8: from django.conf import settings\n9: from django.core.exceptions import ImproperlyConfigured, MiddlewareNotUsed\n10: from django.core.signals import request_finished\n11: from django.db import connections, transaction\n12: from django.urls import get_resolver, set_urlconf\n13: from django.utils.log import log_response\n14: from django.utils.module_loading import import_string\n15: \n16: from .exception import convert_exception_to_response\n17: \n18: logger = logging.getLogger(\"django.request\")\n19: \n20: \n21: class BaseHandler:\n22:     _view_middleware = None\n23:     _template_response_middleware = None\n24:     _exception_middleware = None\n25:     _middleware_chain = None\n26: \n27:     def load_middleware(self, is_async=False):\n28:         \"\"\"\n29:         Populate middleware lists from settings.MIDDLEWARE.\n30: \n31:         Must be called after the environment is fixed (see __call__ in\n32:         subclasses).\n33:         \"\"\"\n34:         self._view_middleware = []\n35:         self._template_response_middleware = []\n36:         self._exception_middleware = []\n37: \n38:         get_response = self._get_response_async if is_async else self._get_response\n39:         handler = convert_exception_to_response(get_response)\n40:         handler_is_async = is_async\n41:         for middleware_path in reversed(settings.MIDDLEWARE):\n42:             middleware = import_string(middleware_path)\n43:             middleware_can_sync = getat...

{"text":"URL: https://demo.sourcegraph.com/github.com/sg-evals/django--674eda1c@674eda1c03a3187905f48afee0f15226aa62fdf3/-/blob/django/utils/deprecation.py\n1: import functools\n2: import inspect\n3: import os\n4: import warnings\n5: from collections import Counter\n6: from inspect import iscoroutinefunction, markcoroutinefunction\n7: \n8: from asgiref.sync import sync_to_async\n9: \n10: import django\n11: \n12: \n13: @functools.cache\n14: def django_file_prefixes():\n15:     try:\n16:         file = django.__file__\n17:     except AttributeError:\n18:         return ()\n19:     return (os.path.dirname(file),)\n20: \n21: \n22: class RemovedInNextVersionWarning(DeprecationWarning):\n23:     pass\n24: \n25: \n26: class RemovedInDjango70Warning(PendingDeprecationWarning):\n27:     pass\n28: \n29: \n30: RemovedAfterNextVersionWarning = RemovedInDjango70Warning\n31: \n32: \n33: class warn_about_renamed_method:\n34:     def __init__(\n35:         self, class_name, old_method_name, new_method_name, deprecation_warning\n36:     ):\n37:         self.class_name = class_name\n38:         self.old_method_name = old_method_name\n39:         self.new_method_name = new_method_name\n40:         self.deprecation_warning = deprecation_warning\n41: \n42:     def __call__(self, f):\n43:         def wrapper(*args, **kwargs):\n44:             warnings.warn(\n45:                 \"`%s.%s` is deprecated, use `%s` instead.\"\n46:                 % (self.class_name, self.old_method_name, self.new_method_name),\n47:                 self.deprecation_warning,\n48:                 2,\n49:             )\n50:             return f(*args, **kwargs)\n51: \n52:         return wrapper\n53: \n54: \n55: class RenameMethodsBase(type):\n56:     \"\"\"\n57:     Handles the deprecation paths when renaming a meth...

Now let me read the WSGI/ASGI handlers and exception handler.

{"text":"URL: https://demo.sourcegraph.com/github.com/sg-evals/django--674eda1c@674eda1c03a3187905f48afee0f15226aa62fdf3/-/blob/django/core/handlers/wsgi.py\n1: from io import IOBase\n2: \n3: from django.conf import settings\n4: from django.core import signals\n5: from django.core.handlers import base\n6: from django.http import HttpRequest, QueryDict, parse_cookie\n7: from django.urls import set_script_prefix\n8: from django.utils.encoding import repercent_broken_unicode\n9: from django.utils.functional import cached_property\n10: from django.utils.regex_helper import _lazy_re_compile\n11: \n12: _slashes_re = _lazy_re_compile(rb\"/+\")\n13: \n14: \n15: class LimitedStream(IOBase):\n16:     \"\"\"\n17:     Wrap another stream to disallow reading it past a number of bytes.\n18: \n19:     Based on the implementation from werkzeug.wsgi.LimitedStream. See:\n20:     https://github.com/pallets/werkzeug/blob/dbf78f67/src/werkzeug/wsgi.py#L828\n21:     \"\"\"\n22: \n23:     def __init__(self, stream, limit):\n24:         self._read = stream.read\n25:         self._readline = stream.readline\n26:         self._pos = 0\n27:         self.limit = limit\n28: \n29:     def read(self, size=-1, /):\n30:         _pos = self._pos\n31:         limit = self.limit\n32:         if _pos >= limit:\n33:             return b\"\"\n34:         if size == -1 or size is None:\n35:             size = limit - _pos\n36:         else:\n37:             size = min(size, limit - _pos)\n38:         data = self._read(size)\n39:         self._pos += len(data)\n40:         return data\n41: \n42:     def readline(self, size=-1, /):\n43:         _pos = self._pos\n44:         limit = self.limit\n45:         if _pos >= limit:\n46:             return b\"\"\n47:         if size == -1 or size is None:\n48:           ...

{"text":"URL: https://demo.sourcegraph.com/github.com/sg-evals/django--674eda1c@674eda1c03a3187905f48afee0f15226aa62fdf3/-/blob/django/core/handlers/exception.py\n1: import logging\n2: import sys\n3: from functools import wraps\n4: from inspect import iscoroutinefunction\n5: \n6: from asgiref.sync import sync_to_async\n7: \n8: from django.conf import settings\n9: from django.core import signals\n10: from django.core.exceptions import (\n11:     BadRequest,\n12:     PermissionDenied,\n13:     RequestDataTooBig,\n14:     SuspiciousOperation,\n15:     TooManyFieldsSent,\n16:     TooManyFilesSent,\n17: )\n18: from django.http import Http404\n19: from django.http.multipartparser import MultiPartParserError\n20: from django.urls import get_resolver, get_urlconf\n21: from django.utils.log import log_response\n22: from django.views import debug\n23: \n24: \n25: def convert_exception_to_response(get_response):\n26:     \"\"\"\n27:     Wrap the given get_response callable in exception-to-response conversion.\n28: \n29:     All exceptions will be converted. All known 4xx exceptions (Http404,\n30:     PermissionDenied, MultiPartParserError, SuspiciousOperation) will be\n31:     converted to the appropriate response, and all other exceptions will be\n32:     converted to 500 responses.\n33: \n34:     This decorator is automatically applied to all middleware to ensure that\n35:     no middleware leaks an exception and that the next middleware in the stack\n36:     can rely on getting a response instead of an exception.\n37:     \"\"\"\n38:     if iscoroutinefunction(get_response):\n39: \n40:         @wraps(get_response)\n41:         async def inner(request):\n42:             try:\n43:                 response = await get_response(request)\n44:             except Exception as exc:\n45...

Now let me read the ASGI handler and a few key middleware files.

{"text":"URL: https://demo.sourcegraph.com/github.com/sg-evals/django--674eda1c@674eda1c03a3187905f48afee0f15226aa62fdf3/-/blob/django/core/handlers/asgi.py\n1: import asyncio\n2: import logging\n3: import sys\n4: import tempfile\n5: import traceback\n6: from contextlib import aclosing, closing\n7: \n8: from asgiref.sync import ThreadSensitiveContext, sync_to_async\n9: \n10: from django.conf import settings\n11: from django.core import signals\n12: from django.core.exceptions import RequestAborted, RequestDataTooBig\n13: from django.core.handlers import base\n14: from django.http import (\n15:     FileResponse,\n16:     HttpRequest,\n17:     HttpResponse,\n18:     HttpResponseBadRequest,\n19:     HttpResponseServerError,\n20:     QueryDict,\n21:     parse_cookie,\n22: )\n23: from django.urls import set_script_prefix\n24: from django.utils.functional import cached_property\n25: \n26: logger = logging.getLogger(\"django.request\")\n27: \n28: \n29: def get_script_prefix(scope):\n30:     \"\"\"\n31:     Return the script prefix to use from either the scope or a setting.\n32:     \"\"\"\n33:     if settings.FORCE_SCRIPT_NAME:\n34:         return settings.FORCE_SCRIPT_NAME\n35:     return scope.get(\"root_path\", \"\") or \"\"\n36: \n37: \n38: class ASGIRequest(HttpRequest):\n39:     \"\"\"\n40:     Custom request subclass that decodes from an ASGI-standard request dict\n41:     and wraps request body handling.\n42:     \"\"\"\n43: \n44:     # Number of seconds until a Request gives up on trying to read a request\n45:     # body and aborts.\n46:     body_receive_timeout = 60\n47: \n48:     def __init__(self, scope, body_file):\n49:         self.scope = scope\n50:         self._post_parse_error = False\n51:         self._read_started = False\n52:         self.resolver_match = ...

{"text":"URL: https://demo.sourcegraph.com/github.com/sg-evals/django--674eda1c@674eda1c03a3187905f48afee0f15226aa62fdf3/-/blob/django/utils/decorators.py\n1: \"Functions that help with dynamically creating decorators for views.\"\n2: \n3: from functools import partial, update_wrapper, wraps\n4: from inspect import iscoroutinefunction, markcoroutinefunction\n5: \n6: \n7: class classonlymethod(classmethod):\n8:     def __get__(self, instance, cls=None):\n9:         if instance is not None:\n10:             raise AttributeError(\n11:                 \"This method is available only on the class, not on instances.\"\n12:             )\n13:         return super().__get__(instance, cls)\n14: \n15: \n16: def _update_method_wrapper(_wrapper, decorator):\n17:     # _multi_decorate()'s bound_method isn't available in this scope. Cheat by\n18:     # using it on a dummy function.\n19:     @decorator\n20:     def dummy(*args, **kwargs):\n21:         pass\n22: \n23:     update_wrapper(_wrapper, dummy)\n24: \n25: \n26: def _multi_decorate(decorators, method):\n27:     \"\"\"\n28:     Decorate `method` with one or more function decorators. `decorators` can be\n29:     a single decorator or an iterable of decorators.\n30:     \"\"\"\n31:     if hasattr(decorators, \"__iter__\"):\n32:         # Apply a list/tuple of decorators if 'decorators' is one. Decorator\n33:         # functions are applied so that the call order is the same as the\n34:         # order in which they appear in the iterable.\n35:         decorators = decorators[::-1]\n36:     else:\n37:         decorators = [decorators]\n38: \n39:     def _wrapper(self, *args, **kwargs):\n40:         # bound_method has the signature that 'decorator' expects i.e. no\n41:         # 'self' argument, but it's a closure over self so it ca...

Let me also check the middleware documentation and a few more individual middleware files.

{"text":"URL: https://demo.sourcegraph.com/github.com/sg-evals/django--674eda1c@674eda1c03a3187905f48afee0f15226aa62fdf3/-/blob/django/middleware/cache.py\n1: \"\"\"\n2: Cache middleware. If enabled, each Django-powered page will be cached based on\n3: URL. The canonical way to enable cache middleware is to set\n4: ``UpdateCacheMiddleware`` as your first piece of middleware, and\n5: ``FetchFromCacheMiddleware`` as the last::\n6: \n7:     MIDDLEWARE = [\n8:         'django.middleware.cache.UpdateCacheMiddleware',\n9:         ...\n10:         'django.middleware.cache.FetchFromCacheMiddleware'\n11:     ]\n12: \n13: This is counterintuitive, but correct: ``UpdateCacheMiddleware`` needs to run\n14: last during the response phase, which processes middleware bottom-up;\n15: ``FetchFromCacheMiddleware`` needs to run last during the request phase, which\n16: processes middleware top-down.\n17: \n18: The single-class ``CacheMiddleware`` can be used for some simple sites.\n19: However, if any other piece of middleware needs to affect the cache key, you'll\n20: need to use the two-part ``UpdateCacheMiddleware`` and\n21: ``FetchFromCacheMiddleware``. This'll most often happen when you're using\n22: Django's ``LocaleMiddleware``.\n23: \n24: More details about how the caching works:\n25: \n26: * Only GET or HEAD-requests with status code 200 are cached.\n27: \n28: * The number of seconds each page is stored for is set by the \"max-age\" section\n29:   of the response's \"Cache-Control\" header, falling back to the\n30:   CACHE_MIDDLEWARE_SECONDS setting if the section was not found.\n31: \n32: * This middleware expects that a HEAD request is answered with the same\n33:   response headers exactly like the corresponding GET request.\n34: \n35: * When a hit occurs, a shallow copy of the ...

{"text":"URL: https://demo.sourcegraph.com/github.com/sg-evals/django--674eda1c@674eda1c03a3187905f48afee0f15226aa62fdf3/-/blob/django/middleware/common.py%3FL1-50\n1: import re\n2: from urllib.parse import urlsplit\n3: \n4: from django.conf import settings\n5: from django.core.exceptions import PermissionDenied\n6: from django.core.mail import mail_managers\n7: from django.http import HttpResponsePermanentRedirect\n8: from django.urls import is_valid_path\n9: from django.utils.deprecation import MiddlewareMixin\n10: from django.utils.http import escape_leading_slashes\n11: \n12: \n13: class CommonMiddleware(MiddlewareMixin):\n14:     \"\"\"\n15:     \"Common\" middleware for taking care of some basic operations:\n16: \n17:         - Forbid access to User-Agents in settings.DISALLOWED_USER_AGENTS\n18: \n19:         - URL rewriting: Based on the APPEND_SLASH and PREPEND_WWW settings,\n20:           append missing slashes and/or prepends missing \"www.\"s.\n21: \n22:             - If APPEND_SLASH is set and the initial URL doesn't end with a\n23:               slash, and it is not found in urlpatterns, form a new URL by\n24:               appending a slash at the end. If this new URL is found in\n25:               urlpatterns, return an HTTP redirect to this new URL; otherwise\n26:               process the initial URL as usual.\n27: \n28:           This behavior can be customized by subclassing CommonMiddleware and\n29:           overriding the response_redirect_class attribute.\n30:     \"\"\"\n31: \n32:     response_redirect_class = HttpResponsePermanentRedirect\n33: \n34:     def process_request(self, request):\n35:         \"\"\"\n36:         Check for denied User-Agents and rewrite the URL based on\n37:         settings.APPEND_SLASH and settings.PREPEND_WWW\n38:    ...

Let me also check the contrib auth middleware and clickjacking files.

{"text":"django/contrib/auth/handlers/\ndjango/contrib/auth/locale/\ndjango/contrib/auth/management/\ndjango/contrib/auth/migrations/\ndjango/contrib/auth/templates/\ndjango/contrib/auth/templatetags/\ndjango/contrib/auth/__init__.py\ndjango/contrib/auth/admin.py\ndjango/contrib/auth/apps.py\ndjango/contrib/auth/backends.py\ndjango/contrib/auth/base_user.py\ndjango/contrib/auth/checks.py\ndjango/contrib/auth/common-passwords.txt.gz\ndjango/contrib/auth/context_processors.py\ndjango/contrib/auth/decorators.py\ndjango/contrib/auth/forms.py\ndjango/contrib/auth/hashers.py\ndjango/contrib/auth/middleware.py\ndjango/contrib/auth/mixins.py\ndjango/contrib/auth/models.py\ndjango/contrib/auth/password_validation.py\ndjango/contrib/auth/signals.py\ndjango/contrib/auth/tokens.py\ndjango/contrib/auth/urls.py\ndjango/contrib/auth/validators.py\ndjango/contrib/auth/views.py\n"}

{"text":"URL: https://demo.sourcegraph.com/github.com/sg-evals/django--674eda1c@674eda1c03a3187905f48afee0f15226aa62fdf3/-/blob/django/middleware/clickjacking.py\n1: \"\"\"\n2: Clickjacking Protection Middleware.\n3: \n4: This module provides a middleware that implements protection against a\n5: malicious site loading resources from your site in a hidden frame.\n6: \"\"\"\n7: \n8: from django.conf import settings\n9: from django.utils.deprecation import MiddlewareMixin\n10: \n11: \n12: class XFrameOptionsMiddleware(MiddlewareMixin):\n13:     \"\"\"\n14:     Set the X-Frame-Options HTTP header in HTTP responses.\n15: \n16:     Do not set the header if it's already set or if the response contains\n17:     a xframe_options_exempt value set to True.\n18: \n19:     By default, set the X-Frame-Options header to 'DENY', meaning the response\n20:     cannot be displayed in a frame, regardless of the site attempting to do so.\n21:     To enable the response to be loaded on a frame within the same site, set\n22:     X_FRAME_OPTIONS in your project's Django settings to 'SAMEORIGIN'.\n23:     \"\"\"\n24: \n25:     def process_response(self, request, response):\n26:         # Don't set it if it's already in the response\n27:         if response.get(\"X-Frame-Options\") is not None:\n28:             return response\n29: \n30:         # Don't set it if they used @xframe_options_exempt\n31:         if getattr(response, \"xframe_options_exempt\", False):\n32:             return response\n33: \n34:         response.headers[\"X-Frame-Options\"] = self.get_xframe_options_value(\n35:             request,\n36:             response,\n37:         )\n38:         return response\n39: \n40:     def get_xframe_options_value(self, request, response):\n41:         \"\"\"\n42:         Get the value t...

Let me read the auth middleware and a couple more files to ensure complete coverage.

{"text":"URL: https://demo.sourcegraph.com/github.com/sg-evals/django--674eda1c@674eda1c03a3187905f48afee0f15226aa62fdf3/-/blob/django/contrib/auth/middleware.py\n1: from functools import partial\n2: from inspect import iscoroutinefunction, markcoroutinefunction\n3: from urllib.parse import urlsplit\n4: \n5: from django.conf import settings\n6: from django.contrib import auth\n7: from django.contrib.auth import REDIRECT_FIELD_NAME, load_backend\n8: from django.contrib.auth.backends import RemoteUserBackend\n9: from django.contrib.auth.views import redirect_to_login\n10: from django.core.exceptions import ImproperlyConfigured\n11: from django.shortcuts import resolve_url\n12: from django.utils.deprecation import MiddlewareMixin\n13: from django.utils.functional import SimpleLazyObject\n14: \n15: \n16: def get_user(request):\n17:     if not hasattr(request, \"_cached_user\"):\n18:         request._cached_user = auth.get_user(request)\n19:     return request._cached_user\n20: \n21: \n22: async def auser(request):\n23:     if not hasattr(request, \"_acached_user\"):\n24:         request._acached_user = await auth.aget_user(request)\n25:     return request._acached_user\n26: \n27: \n28: class AuthenticationMiddleware(MiddlewareMixin):\n29:     def process_request(self, request):\n30:         if not hasattr(request, \"session\"):\n31:             raise ImproperlyConfigured(\n32:                 \"The Django authentication middleware requires session \"\n33:                 \"middleware to be installed. Edit your MIDDLEWARE setting to \"\n34:                 \"insert \"\n35:                 \"'django.contrib.sessions.middleware.SessionMiddleware' before \"\n36:                 \"'django.contrib.auth.middleware.AuthenticationMiddleware'.\"\n37:             )\n38:         reques...

{"text":"URL: https://demo.sourcegraph.com/github.com/sg-evals/django--674eda1c@674eda1c03a3187905f48afee0f15226aa62fdf3/-/blob/django/middleware/gzip.py\n1: from django.utils.cache import patch_vary_headers\n2: from django.utils.deprecation import MiddlewareMixin\n3: from django.utils.regex_helper import _lazy_re_compile\n4: from django.utils.text import acompress_sequence, compress_sequence, compress_string\n5: \n6: re_accepts_gzip = _lazy_re_compile(r\"\\bgzip\\b\")\n7: \n8: \n9: class GZipMiddleware(MiddlewareMixin):\n10:     \"\"\"\n11:     Compress content if the browser allows gzip compression.\n12:     Set the Vary header accordingly, so that caches will base their storage\n13:     on the Accept-Encoding header.\n14:     \"\"\"\n15: \n16:     max_random_bytes = 100\n17: \n18:     def process_response(self, request, response):\n19:         # It's not worth attempting to compress really short responses.\n20:         if not response.streaming and len(response.content) < 200:\n21:             return response\n22: \n23:         # Avoid gzipping if we've already got a content-encoding.\n24:         if response.has_header(\"Content-Encoding\"):\n25:             return response\n26: \n27:         patch_vary_headers(response, (\"Accept-Encoding\",))\n28: \n29:         ae = request.META.get(\"HTTP_ACCEPT_ENCODING\", \"\")\n30:         if not re_accepts_gzip.search(ae):\n31:             return response\n32: \n33:         if response.streaming:\n34:             if response.is_async:\n35:                 response.streaming_content = acompress_sequence(\n36:                     response.streaming_content,\n37:                     max_random_bytes=self.max_random_bytes,\n38:                 )\n39:             else:\n40:                 response.streaming_content = compress_seq...

I now have comprehensive coverage of all relevant files. Let me write the answer.

File created successfully at: /workspace/answer.json (file state is current in your context — no need to Read it back)

The `answer.json` has been written. Here's a summary of what I found:

## Django Middleware Implementation

**Core stack construction** (`django/core/handlers/base.py`):
- `BaseHandler.load_middleware()` iterates `settings.MIDDLEWARE` in **reverse**, wrapping each middleware around the previous handler — `mw_instance = middleware(adapted_handler)` — to build a callable chain stored in `_middleware_chain`.
- Separate lists (`_view_middleware`, `_template_response_middleware`, `_exception_middleware`) collect per-phase hooks.

**Calling convention** (`django/utils/deprecation.py`):
- `MiddlewareMixin.__call__` calls `process_request` → `get_response` (next layer) → `process_response`, producing the "onion" model: `process_request` runs top-down (first MIDDLEWARE entry first), `process_response` runs bottom-up (last MIDDLEWARE entry first).

**Exception wrapping** (`django/core/handlers/exception.py`):
- `convert_exception_to_response()` is applied around every layer so no middleware leaks an unhandled exception.

**WSGI vs. Django middleware call order**: Both use the same nesting/onion principle. Django adds extra hook phases (`process_view`, `process_exception`, `process_template_response`) beyond the basic request/response pair, and its short-circuit behavior (only middlewares before the short-circuiting one see the response) matches what WSGI wrapping naturally provides.

I'll explore the workspace to find the Django repo and relevant middleware files.

django--674eda1c

AUTHORS
CONTRIBUTING.rst
Gruntfile.js
INSTALL
LICENSE
LICENSE.python
MANIFEST.in
README.rst
django
docs
eslint-recommended.js
eslint.config.mjs
extras
globals.js
js_tests
package.json
pyproject.toml
scripts
tests
tox.ini
zizmor.yml

/workspace/django--674eda1c/django/utils/deprecation.py

/workspace/django--674eda1c/django/core/handlers/:
__init__.py
asgi.py
base.py
exception.py
wsgi.py

/workspace/django--674eda1c/django/middleware/:
__init__.py
cache.py
clickjacking.py
common.py
csp.py
csrf.py
gzip.py
http.py
locale.py
security.py

1	import asyncio
2	import logging
3	import types
4	from inspect import iscoroutinefunction
5	
6	from asgiref.sync import async_to_sync, sync_to_async
7	
8	from django.conf import settings
9	from django.core.exceptions import ImproperlyConfigured, MiddlewareNotUsed
10	from django.core.signals import request_finished
11	from django.db import connections, transaction
12	from django.urls import get_resolver, set_urlconf
13	from django.utils.log import log_response
14	from django.utils.module_loading import import_string
15	
16	from .exception import convert_exception_to_response
17	
18	logger = logging.getLogger("django.request")
19	
20	
21	class BaseHandler:
22	    _view_middleware = None
23	    _template_response_middleware = None
24	    _exception_middleware = None
25	    _middleware_chain = None
26	
27	    def load_middleware(self, is_async=False):
28	        """
29	        Populate middleware lists from settings.MIDDLEWARE.
30	
31	        Must be called after the environment is fixed (see __call__ in
32	        subclasses).
33	        """
34	        self._view_middleware = []
35	        self._template_response_middleware = []
36	        self._exception_middleware = []
37	
38	        get_response = self._get_response_async if is_async else self._get_response
39	        handler = convert_exception_to_response(get_response)
40	        handler_is_async = is_async
41	        for middleware_path in reversed(settings.MIDDLEWARE):
42	            middleware = import_string(middleware_path)
43	            middleware_can_sync = getattr(middleware, "sync_capable", True)
44	            middleware_can_async = getattr(middleware, "async_capable", False)
45	            if not middleware_can_sync and not middleware_can_async:
46	                raise RuntimeError(
47	                  ...

1	import functools
2	import inspect
3	import os
4	import warnings
5	from collections import Counter
6	from inspect import iscoroutinefunction, markcoroutinefunction
7	
8	from asgiref.sync import sync_to_async
9	
10	import django
11	
12	
13	@functools.cache
14	def django_file_prefixes():
15	    try:
16	        file = django.__file__
17	    except AttributeError:
18	        return ()
19	    return (os.path.dirname(file),)
20	
21	
22	class RemovedInNextVersionWarning(DeprecationWarning):
23	    pass
24	
25	
26	class RemovedInDjango70Warning(PendingDeprecationWarning):
27	    pass
28	
29	
30	RemovedAfterNextVersionWarning = RemovedInDjango70Warning
31	
32	
33	class warn_about_renamed_method:
34	    def __init__(
35	        self, class_name, old_method_name, new_method_name, deprecation_warning
36	    ):
37	        self.class_name = class_name
38	        self.old_method_name = old_method_name
39	        self.new_method_name = new_method_name
40	        self.deprecation_warning = deprecation_warning
41	
42	    def __call__(self, f):
43	        def wrapper(*args, **kwargs):
44	            warnings.warn(
45	                "`%s.%s` is deprecated, use `%s` instead."
46	                % (self.class_name, self.old_method_name, self.new_method_name),
47	                self.deprecation_warning,
48	                2,
49	            )
50	            return f(*args, **kwargs)
51	
52	        return wrapper
53	
54	
55	class RenameMethodsBase(type):
56	    """
57	    Handles the deprecation paths when renaming a method.
58	
59	    It does the following:
60	        1) Define the new method if missing and complain about it.
61	        2) Define the old method if missing.
62	        3) Complain whenever an old method is called.
63	
64	    See #15363 for more details.
65	    """
66	
67	    ...

1	from io import IOBase
2	
3	from django.conf import settings
4	from django.core import signals
5	from django.core.handlers import base
6	from django.http import HttpRequest, QueryDict, parse_cookie
7	from django.urls import set_script_prefix
8	from django.utils.encoding import repercent_broken_unicode
9	from django.utils.functional import cached_property
10	from django.utils.regex_helper import _lazy_re_compile
11	
12	_slashes_re = _lazy_re_compile(rb"/+")
13	
14	
15	class LimitedStream(IOBase):
16	    """
17	    Wrap another stream to disallow reading it past a number of bytes.
18	
19	    Based on the implementation from werkzeug.wsgi.LimitedStream. See:
20	    https://github.com/pallets/werkzeug/blob/dbf78f67/src/werkzeug/wsgi.py#L828
21	    """
22	
23	    def __init__(self, stream, limit):
24	        self._read = stream.read
25	        self._readline = stream.readline
26	        self._pos = 0
27	        self.limit = limit
28	
29	    def read(self, size=-1, /):
30	        _pos = self._pos
31	        limit = self.limit
32	        if _pos >= limit:
33	            return b""
34	        if size == -1 or size is None:
35	            size = limit - _pos
36	        else:
37	            size = min(size, limit - _pos)
38	        data = self._read(size)
39	        self._pos += len(data)
40	        return data
41	
42	    def readline(self, size=-1, /):
43	        _pos = self._pos
44	        limit = self.limit
45	        if _pos >= limit:
46	            return b""
47	        if size == -1 or size is None:
48	            size = limit - _pos
49	        else:
50	            size = min(size, limit - _pos)
51	        line = self._readline(size)
52	        self._pos += len(line)
53	        return line
54	
55	
56	class WSGIRequest(HttpRequest):
57	    def __init__(self, environ):
58	  ...

1	import logging
2	import sys
3	from functools import wraps
4	from inspect import iscoroutinefunction
5	
6	from asgiref.sync import sync_to_async
7	
8	from django.conf import settings
9	from django.core import signals
10	from django.core.exceptions import (
11	    BadRequest,
12	    PermissionDenied,
13	    RequestDataTooBig,
14	    SuspiciousOperation,
15	    TooManyFieldsSent,
16	    TooManyFilesSent,
17	)
18	from django.http import Http404
19	from django.http.multipartparser import MultiPartParserError
20	from django.urls import get_resolver, get_urlconf
21	from django.utils.log import log_response
22	from django.views import debug
23	
24	
25	def convert_exception_to_response(get_response):
26	    """
27	    Wrap the given get_response callable in exception-to-response conversion.
28	
29	    All exceptions will be converted. All known 4xx exceptions (Http404,
30	    PermissionDenied, MultiPartParserError, SuspiciousOperation) will be
31	    converted to the appropriate response, and all other exceptions will be
32	    converted to 500 responses.
33	
34	    This decorator is automatically applied to all middleware to ensure that
35	    no middleware leaks an exception and that the next middleware in the stack
36	    can rely on getting a response instead of an exception.
37	    """
38	    if iscoroutinefunction(get_response):
39	
40	        @wraps(get_response)
41	        async def inner(request):
42	            try:
43	                response = await get_response(request)
44	            except Exception as exc:
45	                response = await sync_to_async(
46	                    response_for_exception, thread_sensitive=False
47	                )(request, exc)
48	            return response
49	
50	        return inner
51	    else:
52	
53	        @wraps(get_respo...

Now let me check the MIDDLEWARE setting default and `get_wsgi_application`.

465:# MIDDLEWARE #
471:MIDDLEWARE = []
516:CACHE_MIDDLEWARE_KEY_PREFIX = ""
517:CACHE_MIDDLEWARE_SECONDS = 600
518:CACHE_MIDDLEWARE_ALIAS = "default"
654:# SECURITY MIDDLEWARE #
667:# CSP MIDDLEWARE #
---
import django
from django.core.handlers.wsgi import WSGIHandler


def get_wsgi_application():
    """
    The public interface to Django's WSGI support. Return a WSGI callable.

    Avoids making django.core.handlers.WSGIHandler a public API, in case the
    internal WSGI implementation changes or moves in the future.
    """
    django.setup(set_prefix=False)
    return WSGIHandler()
---
/workspace/django--674eda1c/django/contrib/admindocs/middleware.py:4:from django.utils.deprecation import MiddlewareMixin
/workspace/django--674eda1c/django/contrib/admindocs/middleware.py:9:class XViewMiddleware(MiddlewareMixin):
/workspace/django--674eda1c/django/contrib/auth/middleware.py:12:from django.utils.deprecation import MiddlewareMixin
/workspace/django--674eda1c/django/contrib/auth/middleware.py:28:class AuthenticationMiddleware(MiddlewareMixin):
/workspace/django--674eda1c/django/contrib/auth/middleware.py:42:class LoginRequiredMiddleware(MiddlewareMixin):
/workspace/django--674eda1c/django/contrib/flatpages/middleware.py:4:from django.utils.deprecation import MiddlewareMixin
/workspace/django--674eda1c/django/contrib/flatpages/middleware.py:7:class FlatpageFallbackMiddleware(MiddlewareMixin):
/workspace/django--674eda1c/django/contrib/messages/middleware.py:3:from django.utils.deprecation import MiddlewareMixin
/workspace/django--674eda1c/django/contrib/messages/middleware.py:6:class MessageMiddleware(MiddlewareMixin):
/workspace/django--674eda1c/django/contrib/redirects/middleware.py:7:from django.utils.deprecation import MiddlewareMixin
/workspace/django--674eda1c/djan...

I have all the pieces. Writing the answer file now.

File created successfully at: /workspace/answer.json (file state is current in your context — no need to Read it back)

Done — `/workspace/answer.json` is written. Here's the TLDR of what I found in the django/django checkout at `/workspace/django--674eda1c`:

**Core files implementing MIDDLEWARE processing:**

- `django/core/handlers/base.py` — `BaseHandler.load_middleware()` is the stack builder. It iterates `reversed(settings.MIDDLEWARE)`, instantiating each middleware around the previous handler (`mw_instance = middleware(handler)`), so the **first** entry in the settings list becomes the **outermost** layer. The result is stored as `_middleware_chain`. The same loop collects `process_view` hooks in forward order (`insert(0, ...)`) and `process_template_response`/`process_exception` hooks in reverse order (`append`). `_get_response()` is the innermost layer that runs view middleware and the view itself.
- `django/utils/deprecation.py` — `MiddlewareMixin.__call__` defines the classic hook ordering: `process_request(request)` on the way in (short-circuiting if it returns a response), then `self.get_response(request)`, then `process_response(request, response)` on the way out. Combined with the reversed construction, `process_request` runs top-to-bottom and `process_response` bottom-to-top of the settings list.
- `django/core/handlers/exception.py` — `convert_exception_to_response()` wraps every layer so no middleware leaks exceptions.
- `django/core/handlers/wsgi.py` + `django/core/wsgi.py` — `WSGIHandler.__init__` calls `load_middleware()`; its `__call__(environ, start_response)` is the single WSGI callable that invokes the whole Django onion. `django/core/handlers/asgi.py` is the async twin (`load_middleware(is_async=True)`).
- `django/conf/global_settings.py` — declares the default `MIDDLEWARE = []` setting.

**WSGI comparison:** Django's chain is functionally the same onion as WSGI...