Dash at end of a router URL Problem

[JafetGuerra]

First Check

• [X] I added a very descriptive title to this issue.
• [X] I used the GitHub search to find a similar issue and didn't find it.
• [X] I searched the FastAPI documentation, with the integrated search.
• [X] I already searched in Google "How to X in FastAPI" and didn't find any information.
• [X] I already read and followed all the tutorial in the docs and didn't find an answer.
• [X] I already checked if it is not related to FastAPI but to Pydantic.
• [X] I already checked if it is not related to FastAPI but to Swagger UI.
• [X] I already checked if it is not related to FastAPI but to ReDoc.

Commit to Help

• [X] I commit to help with one of those options 👆

Example Code

router = APIRouter(
    prefix="/care_line_people",
    tags=["CareLinePeople"],
    responses={404: {"description": "Not found"}},
)


@router.get('/add_identification_to_person')
def add_identification_to_person():
    return '2'

@router.get('/add_identification_to_person_teste/')
def add_identification_to_person():
    return '3'

Description

If I call bot endpoints locally it behaves as expected. Only method GET to the exact correct path, returns me what I want. Call GET with '/add_identification_to_person', returns 2 and call '/add_identification_to_person_teste/' (with dash incluse) returns 3. If I call GET with '/add_identification_to_person/' it returns me 2 and if I call POST with '/add_identification_to_person' it returns {details: method not allowed}.

The problema appears when I run this aplication on a EC2 in AWS configured with an Elastic Beanstalk (with Docker) and a Load Balancer where if I call any HTTP METHOD in a path ending with a '/' it returns me that function normaly. So, if I call POST '/add_identification_to_person_teste' it returns 3 and if a call '/add_identification_to_person/' it returns 2.

I could found an explanation for this problem.

Operating System

Linux

Operating System Details

Both machines, mine and AWS are linux x86.

FastAPI Version

fastapi==0.79.0

Python Version

3.8

Additional Context

No response

[JarroVGIT]

That is extremely weird behaviour. Could you adjust your endpoints like so:

from fastapi import Request

@router.get('/add_identification_to_person')
def add_identification_to_person(r: Request):
    return r.__dict__

and see what the return value is? This will include all elements of the Scope of the request, and thus also the method.

[iudeen]

You say that POST works while you have no routes that support POST METHOD?

[JafetGuerra]

@JarroVGIT: When I added the Request it breaks my endpoint with this error: - RecursionError: maximum recursion depth exceeded while calling a Python object

@iudeen: Yes, but only on an AWS server and with a forward slash ("/") ending the URL. So if a put a forward slash at the URL ending it accepts all HTTP METHODS.

[four43]

FYI that is a "forward slash" not a dash "-"

[JafetGuerra]

@four43 sorry I wrote it fast and I didnt write it properly. It is a foward slash indeed