Root path is applied 2 times when using root_path

Here is error:

Python 3.7.8 fastapi 0.63.0

Run configuration: uvicorn.run("app:app", host="0.0.0.0", port=port, reload=True)

I think the error is in the path here is console log: 127.0.0.1:54913 - "GET /api/v1/api/v1/openapi.json HTTP/1.1" 404 Not Found Here is double path: /api/v1/api/v1/

Doc path is wrong http://localhost:8080/docs I expect it to be: http://localhost:8080/api/v1/docs

Here is the test code to reproduce ‘test_app.py’ file:

import uvicorn
import json
from fastapi import FastAPI, APIRouter, Response
from fastapi.responses import RedirectResponse

app = FastAPI(title="Root path test", root_path="/api/v1")

@app.post("/test-call ", tags=["test"])
def ping():
    return Response(
        json.dumps(dict(ping='pong')), 
        headers={'Content-Type':'application/json'})

@app.get("/")
def read_typer():
    return RedirectResponse('/docs')


if __name__ == "__main__":
    uvicorn.run("test_app:app", host="0.0.0.0", port=8080, reload=True)

[chirag4semandex]

This thread gave me some hints. I found one missing link that helped me solved the openapi.json ( not_found ) issue. Here is what worked for me

I am using nginx as proxy server and FastAPI with Uvicorn. FastAPI and Uvicorn both have the root_path property and they both need to be set for nginx proxy to work properly.

For the openapi.json issue, we need to pass servers property in the FastAPI pointing to the proxy URL.

Here is the sample code for app

from pydantic import BaseSettings

class Settings(BaseSettings):
    app_dir: Path = Path(__file__).parents[1]
    base_path: str = "/app"


settings = Settings()


def create_app():
   app = FastAPI(
        title="MY_APP",
        servers=[{"url": settings.base_path}],
        root_path=settings.base_path,
    )
    return app


if __name__ == "__main__":
    uvicorn.run("app:create_app", host="0.0.0.0", port=8000, root_path=settings.base_path)

Here is a sample code for nginx setup

server {
    listen       443 ssl;
    server_name  localhost;
    ssl_certificate <YOUR_CERT_LOC>;
    ssl_certificate_key <YOUR_KEY_LOC>;

    location /app {
        rewrite ^/app/(.*)$ /$1 break;
        proxy_pass http://<APP_SERVICE_NAME>:<APP_LOCAL_PORT>/app;
    }
}

[intangir]

im seeing similar irritating issues with both lambdas served over an api gatewith with a prefix path

and locally, using both root_path and a router with a prefix

reading the EXACT DOCS from here https://fastapi.tiangolo.com/advanced/behind-a-proxy/ and setting up the root_path…

also using router it isn’t working…

it always just serves things up as if the entire path is always the entire path regardless…

its incredibly infuriating reading doc after doc after doc and following all the the instructures verbatim and not a damn new thing making a damn bit of difference in how its served…

then finding people with the exact same issue being told ‘expected behavior not a bug’

then what are these worthless features for? how should they work?