Error in production

[juanretamales]

Describe the bug
Use Gunicorn in production

To Reproduce
Use gunicorn for start and call a endpoint with limit

Expected behavior
do nothing

Screenshots
If applicable, add screenshots to help explain your problem.
Oct 25 20:16:46 gunicorn[12540]: return await dependant.call(**values) Oct 25 20:16:46 gunicorn[12540]: File "/home/ubuntu/proyect/api/env/lib/python3.10/site-packages/slowapi/extension.py", line 635, in async_wrapper Oct 25 20:16:46 gunicorn[12540]: self._check_request_limit(request, func, False) Oct 25 20:16:46 gunicorn[12540]: File "/home/ubuntu/proyect/api/env/lib/python3.10/site-packages/slowapi/extension.py", line 535, in _check_request_limit Oct 25 20:16:46 gunicorn[12540]: self.__evaluate_limits(request, endpoint, all_limits) Oct 25 20:16:46 gunicorn[12540]: File "/home/ubuntu/proyect/api/env/lib/python3.10/site-packages/slowapi/extension.py", line 413, in __evaluate_limits Oct 25 20:16:46 gunicorn[12540]: limit_key = lim.key_func(request) Oct 25 20:16:46 gunicorn[12540]: File "/home/ubuntu/proyect/api/env/lib/python3.10/site-packages/slowapi/util.py", line 21, in get_remote_address Oct 25 20:16:46 gunicorn[12540]: return request.client.host or "127.0.0.1" Oct 25 20:16:46 gunicorn[12540]: AttributeError: 'NoneType' object has no attribute 'host'

Your app (please complete the following information):

• fastapi or starlette? use fastapi
• Version? - 0.79.0 and 0.85.1
• slowapi version (have you tried with the latest version)? yes, is 0.85.1

Additional context
y set the api in production, and get this error

[laurentS]

Hi @juanretamales I suspect this is a problem with your code, where File "/home/ubuntu/proyect/api/env/lib/python3.10/site-packages/slowapi/util.py", line 21, in get_remote_address Oct 25 20:16:46 gunicorn[12540]: return request.client.host or "127.0.0.1" Oct 25 20:16:46 gunicorn[12540]: AttributeError: 'NoneType' object has no attribute 'host' is the key point:

request.client is None in your execution, I don't think this has anything to do with slowapi.

[juanretamales]

i search and the problem is when you use gunicorn (here has the problem), i suggest any method or option for skip the error when appears.

[thentgesMindee]

Hi @juanretamales
If I'm not wrong, this error happens when your application is running behind a proxy such as nginx (maybe gunicorn as well).
You should make sure you correctly proxy the headers at the proxy level.

[thentgesMindee]

Here is an example configuration that should do the trick, if you use nginx

proxy_set_header   Host             $host;
proxy_set_header   X-Real-IP        $remote_addr;
proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;

EDIT: also with this, for security reason you should add some middleware (for example this one from starlette) to avoid your clients forging their host/ip

[laurentS]

@juanretamales did the comment above help? if so can you close this issue?