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Graph/static-routing-wsgi-async-drift

Pattern

Misrouted Async Static Assets

static-routing-wsgi-async-drift

Static file requests get routed to the wrong container path and behavior changes when switching Django from synchronous WSGI to async ASGI, causing collectstatic/serving to diverge and users to see missing files or broken streamed downloads.

Node Details

Public graph metadata

Updated7/29/2026

Connections

30 linked nodes

GET https://cooking-assistant-phi.vercel.app/static/css/style.css net::ERR_ABORTED 404 (Not Found) — I'm deploying a Flask app to Vercel. Tension: Locally it works perfectly — static files like CSS load and the page looks as expected.

There are a lot of spambots causing `Invalid HTTP_HOST header` — I have a django project running in production with gunicorn. It is connected to sentry.io for comfortable error logging. Tension: Those Spam Bots fill up my sentry plan limits, and after a while other errors are not logged anymore. Outcome: What would be a simple and elegant solution to this?

After having never received this error in Sentry, all of a sudden we have received 20 of these errors over the last day on our app. — Large Render Blocking Asset / New Issue /static/js/main.779fa2a0.js. Tension: Our website https://cbbanalytics.com/ doesn't have the fastest loading home-page, but we haven't changed anything major in the last day that would lead to this issue. Outcome: perhaps this issue was recently added to Sentry, which is why we weren't receiving this issue earlier...

after some time I get a `503 Service Unavailable` error — When I make a POST request to this endpoint, it starts processing. Tension: especially when using ngrok. Outcome: What is the best way to handle long-running POST requests in FastAPI?

If I use `https://my.url.de/qgis/static/index.html` I get an Error 404. — I want to use a static HTML page in my docker to show logfiles via websockets and FastAPI inside a docker container.

When deployed on Azure App Service behind a proxy, FastAPI/Starlette redirects requests to an HTTP URL (e.g., HTTP Location header in a 307) instead of preserving HTTPS. This causes browser mixed-content/security failures because the app is loaded over HTTPS but redirected to HTTP.

SessionMiddleware in a FastAPI backend fails to set the session cookie when the React frontend and backend are hosted on different domains/subdomains (e.g., XXX-ui.fly.dev vs XXX-api.fly.dev). The browser rejects the cookie with an 'invalid domain' error and no session is maintained.

WebSocket progress messages sent from a FastAPI backend during file processing are not received in the Next.js frontend until processing finishes, when all messages arrive at once. Backend logs show progress updates are generated successfully.

ModuleNotFoundError: No module named 'psycopg2' — I have a FastAPI project that uses `asyncpg` to connect to PostgreSQL. Outcome: Changing it to `postgresql+asyncpg://` solved the error.

ERROR: Error loading ASGI app. Could not import module "main". — run through Docker. Tension: I don't find the error because my directory is organized the way it should be. Outcome: CMD ["uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "8000"].

After moving SQL endpoints from `main.py` into an `APIRouter` in `analytics.py`, database dependencies that worked in `main.py` no longer function correctly and errors occur (e.g., import/circular dependency issues).

Getting 502 bad gateway after deploying dockerize app into google app engine.

Any package update or frontend build regenerated that directory and silently removed the custom route/bootstrap scripts — A local web gateway served its [REDACTED] directly from a package build directory. Tension: the live [REDACTED] page reverted to the stock UI.

Dynamic product routes are not being generated statically (build shows only 3 pages instead of many) and navigating to a product on Vercel results in a 500 internal server error. The issue started after type changes in the products page code.

File uploads submitted from Safari to a Tomcat server become corrupted when HTTP/2 is enabled; uploads succeed in Chrome and when HTTP/2 is disabled. The issue affects multiple medium-sized files (a few MB).

{"type":"about:blank","title":"Not Found","status":404,"detail":"No static resource gggg.","instance":"/gggg"} — I have a spring boot application with an angular frontend. I migrated it from spring boot 2.7.18 to 3.3.11. Tension: This seems not to work anymore after migration. No redirection. Outcome: redirect all not found pages to root.

Static image files served correctly when DEBUG=False, but return 404 errors when DEBUG=True.

upstream prematurely closed connection while reading response header from upstream — When a user in my Django application installed on Ubuntu from DigitalOcean (v18+) selects multiple files to send on server. Tension: 502 Bad Gateway. Outcome: Changing the droplet size on DigitalOcean solved my problem.

Requests to the Django/DRF backend fail with “CSRF Failed: Origin checking failed - http://localhost:8000/ does not match any trusted origins.”

Could not find config for 'static files' in settings.STORAGES — running Django 4.2. Tension: This error occurs when running Django 4.2.

celery will run using this order but not django runserver

After deploying a Django 4.x app on ASGI with uvicorn, the database returns OperationalError: FATAL: sorry, too many clients already due to excessive concurrent DB connections.

Heroku deployment of a Django 4.2 app fails with an application error and logs show django.core.exceptions.ImproperlyConfigured: STATICFILES_STORAGE/STORAGES are mutually exclusive.

CSS assets are not loading in Django running in Docker

Requests to the Vite dev server (including '/') are being unexpectedly forwarded to the Django REST API when configuring `server.proxy`, causing loss of access to Vite-served frontend routes/assets.

After deploying a Django site to Vercel (with Whitenoise), static files (e.g., CSS/JS/images) are not loaded correctly and the page shows an error related to static assets not being served.

the streaming zipfly implementation broke. Tension: I needed to implement WebSockets and had to make Django run asynchronously in ASGI.

I am building Django app where I want to run Django and playwright images in 1 container in Docker Desktop (locally).

During Django unittest runs, requests that should return 400 cause console messages like "Bad Request: /api/v1/..." to be logged. The tests pass but the noisy logging output is undesirable.

ImportError, cannot import name 'DEFAULT_STORAGE_ALIAS' from 'django.conf' — trying to run my django app on local server. Tension: malformed django upgrade (4.1.3 => 4.2.7, but the old version wasn't removed).

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