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Example Code

from fastapi import FastAPI, Request, Response
from starlette.middleware.base import BaseHTTPMiddleware, RequestResponseEndpoint


class Middleware(BaseHTTPMiddleware):

    async def dispatch(self, request: Request, call_next: RequestResponseEndpoint) -> Response:
        await request.json()
        response = await call_next(request)
        return response


app = FastAPI()
app.add_middleware(Middleware)


@app.post("/test")
async def test(test: dict) -> dict:
    return {"data": "test"}

Description

• Run script with: uvicorn main:app --reload
• Run CURL with POST request: curl -X 'POST' 'http://localhost:8000/test' -H 'accept: application/json' -H 'Content-Type: application/json' -d '{"test": "test"}'

The application keeps hanging indefinitely and don't send a response to the request. I tested the equivalent code using app = Starlette() and it answers correctly.

Operating System

Linux

Operating System Details

Ubuntu 22.04

FastAPI Version

0.79.0

Python Version

Python 3.10.4

Additional Context

No response