from fastapi import FastAPI

from starlette.types import Message

from starlette.requests import Request

from starlette.middleware.base import BaseHTTPMiddleware

import gzip          

​

​

class GZipedMiddleware(BaseHTTPMiddleware):

    async def set_body(self, request: Request):

        receive_ = await request._receive()

        if "gzip" in request.headers.getlist("Content-Encoding"):

            print(receive_)                                     

            data = gzip.decompress(receive_.get('body'))

            receive_['body'] = data

​

        async def receive() -> Message:

            return receive_

​

        request._receive = receive                

​

    async def dispatch(self, request, call_next):

        await self.set_body(request)        

        response = await call_next(request)                

        return response

​

​

​

app = FastAPI()

​

app.add_middleware(GZipedMiddleware)

​

​

@app.post("/post")

async def post(req: Request):

    body = await req.body()

    # I decode here, assuming that I just compressed

    # a text file, in other use case you should use

    # the appropiate decoder.

    return body.decode("utf-8")