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Forward Slash at end of a router URL Problem

See original GitHub issue

First Check

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

Commit to Help

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.