Documentation Failed to fetch /openapi.json

[NastasiaSaby]

When I click https://host/suburl/documentation

I have a "Failed to load definition".

In the console, I have

Error downloading https://host/openapi.json Failed to fetch

My code looks like that:

from fastapi import FastAPI

app = FastAPI(openapi_url="/openapi.json", docs_url="/documentation")

@app.get("/status")
def return_simple():
    return "ok"
I can't find an anwser for this problem. Do you have any idea?

[NastasiaSaby]

I found a solution. I launched fastapi with a "root-path" like this:

uvicorn fast_api.server:app --host 0.0.0.0 --port 8000 --root-path="/suburl"

[tiangolo]

Thanks for reporting back and closing the issue 👍

[SirBenedick]

I found a solution. I launched fastapi with a "root-path" like this:

uvicorn fast_api.server:app --host 0.0.0.0 --port 8000 --root-path="/suburl"

fyi: it is also possible to pass the root_path as a parameter while creating a FastAPI instance (as described here):

from fastapi import FastAPI, Request

app = FastAPI(root_path="/api/v1")


@app.get("/app")
def read_main(request: Request):
    return {"message": "Hello World", "root_path": request.scope.get("root_path")}

[Haleshot]

I found a solution. I launched fastapi with a "root-path" like this:

uvicorn fast_api.server:app --host 0.0.0.0 --port 8000 --root-path="/suburl"

Just wanted to add on to the path mentioned above:
If your main app files (for running the fast api server like server mentioned above) do not lie in the root directory, then modify the command above as follows:

• Say the app running Fast API is called main.py and lies inside the src folder

uvicorn src.main:app --host 0.0.0.0 --port 8000 --root-path="/suburl"

This might be a known case but just putting it here in case someone finds it useful.

[joshb019919]

Thank you, Sir Benedick! My career as a student has taken me away from Fast API for the moment, but should I return (and I'm intrigued by the whole process) I'll refer back to this. Have a great day. Josh

…

On Thu, Aug 4, 2022 at 5:14 AM SirBenedick ***@***.***> wrote: I found a solution. I launched fastapi with a "root-path" like this: uvicorn fast_api.server:app --host 0.0.0.0 --port 8000 --root-path="/suburl" fyi: it is also possible to pass the root_path as a parameter while creating a FastAPI instance (as described here <https://fastapi.tiangolo.com/advanced/behind-a-proxy/?h=root+path#setting-the-root_path-in-the-fastapi-app> ): from fastapi import FastAPI, Request app = FastAPI(root_path="/api/v1") @app.get("/app") def read_main(request: Request): return {"message": "Hello World", "root_path": request.scope.get("root_path")} — Reply to this email directly, view it on GitHub <#1811 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ALD4BVW7Z4MDMNDQ73IOPU3VXOJXTANCNFSM4PLXLXQA> . You are receiving this because you commented.Message ID: ***@***.***>