ftp proxy with FastAPI

ftpproxy.py

import aioftp
from fastapi import FastAPI, HTTPException, Request
from fastapi.responses import StreamingResponse

app = FastAPI()

@app.get('/fetch/{filename}', name='fetch')
async def ftp_fetch(request: Request, filename: str):
    return StreamingResponse(
        stream_file(filename),
        media_type='audio/mpeg',
        headers={
            'content-disposition': 'attachment; filename="{}"'.format(filename)
        },
    )


async def stream_file(filename):
    async with aioftp.Client.context(hostname='ftp-server', username='username', password='Welcome123') as client:
        async with client.download_stream(filename) as stream:
            async for block in stream.iter_by_block():
                yield block