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Draft: Add warning async is not supported #1911

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Draft: Add warning async is not supported #1911

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a35ac44
Add warning async is not supported
denisSurkov Jul 6, 2024
2989e9f
Fix import and removed useless skipUnless
denisSurkov Jul 6, 2024
53eaef7
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Jul 6, 2024
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18 changes: 18 additions & 0 deletions debug_toolbar/middleware.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,11 @@
from debug_toolbar.toolbar import DebugToolbar
from debug_toolbar.utils import clear_stack_trace_caches

try:
from django.core.handlers.asgi import ASGIRequest
except ImportError:
ASGIRequest = None

_HTML_TYPES = ("text/html", "application/xhtml+xml")


Expand Down Expand Up @@ -73,6 +78,10 @@ def __call__(self, request):
if not show_toolbar(request) or DebugToolbar.is_toolbar_request(request):
return self.get_response(request)

if self._check_async_request(request):
self._show_async_request_is_not_supported()
return self.get_response(request)

toolbar = DebugToolbar(request, self.get_response)

# Activate instrumentation ie. monkey-patch.
Expand Down Expand Up @@ -133,3 +142,12 @@ def get_headers(request, panels):
else:
headers[header] = value
return headers

def _check_async_request(self, request) -> bool:
return type(request) == ASGIRequest

@staticmethod
def _show_async_request_is_not_supported():
print("-" * 10)
print("Be caution, django-debug-toolbar does not support async requests!")
print("-" * 10)
1 change: 1 addition & 0 deletions docs/changes.rst
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Expand Up @@ -6,6 +6,7 @@ Pending

* Changed ordering (and grammatical number) of panels and their titles in
documentation to match actual panel ordering and titles.
* Added warning "async is not supported"

4.4.5 (2024-07-05)
------------------
Expand Down
51 changes: 51 additions & 0 deletions tests/test_integration.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
import io
import os
import re
import sys
import time
import unittest
from unittest.mock import patch
Expand Down Expand Up @@ -33,6 +35,12 @@
webdriver = None


try:
from django.test import AsyncRequestFactory
except ImportError:
AsyncRequestFactory = None
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AsyncRequestFactory is defined in Django >= v3.1 so the ImportError should not happen on all supported versions of Django.

Just modify line 16 to read from django.test import AsyncRequestFactory, RequestFactory



rf = RequestFactory()


Expand Down Expand Up @@ -843,3 +851,46 @@ def test_theme_toggle(self):
self.get("/regular/basic/")
toolbar = self.selenium.find_element(By.ID, "djDebug")
self.assertEqual(toolbar.get_attribute("data-theme"), "light")


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@cclauss cclauss Jul 6, 2024 •
edited
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Suggested change
from django.test import AsyncRequestFactory

https://docs.djangoproject.com/en/stable/topics/testing/advanced/#asyncrequestfactory

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Thank you for the tip

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@cclauss cclauss Jul 6, 2024 •
edited
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You must move that line up near the top of the file with the other imports.

Modify line 16 to read from django.test import AsyncRequestFactory, RequestFactory

@unittest.skipUnless(
AsyncRequestFactory is not None, "Test valid only for django with async requests"
)
@override_settings(DEBUG=True)
class DebugToolbarAsyncTestCase(BaseTestCase):
@classmethod
def setUpClass(cls):
super().setUpClass()
cls.async_rf = AsyncRequestFactory()
cls.simple_get_response = lambda *args, **kwargs: HttpResponse(
"<html><body></body></html>"
)
cls._default_stdout = sys.stdout

def setUp(self):
super().setUp()
self.captured_output = io.StringIO()
sys.stdout = self.captured_output

@classmethod
def tearDownClass(cls):
super().tearDownClass()
sys.stdout = cls._default_stdout

def test_do_not_render_toolbar_if_it_was_async_request(self):
captured_output = io.StringIO()
sys.stdout = captured_output

request = self.async_rf.get("/")
response = DebugToolbarMiddleware(self.simple_get_response)(request)

self.assertEqual(response.content, b"<html><body></body></html>")

def test_prints_warning_async_is_not_supported(self):
request = self.async_rf.get("/")
DebugToolbarMiddleware(self.simple_get_response)(request)

assert (
self.captured_output.getvalue()
== "----------\nBe caution, django-debug-toolbar does not support async requests!\n----------\n"
)