How to fix error when using send_file in Flask?

Question

Flask

Goodnight! I'm trying to transfer a file to a user not from my server, acting as an "intermediary"

# Download from provided URL.
@app.route('/<path:url>')
def download(url):
    req = requests.get(url, stream=True)
    return send_file(stream_with_context(req.iter_content(1024)), mimetype='mp3')

When a user follows the link mysite.ru/anothersite.mp3, he should start downloading a file from someone else's server, but I get an error:

AttributeError: 'generator' object has no attribute 'read'

. How can it be corrected?

Answer 1

You can try like this

response = Response(stream_with_context(req.iter_content()), mimetype='audio/mpeg')
response.headers['Content-Disposition'] = 'attachment; filename=some_file_name.mp3'
return response

But it is possible that the upstream will still have to be completely pulled out first, and then given to the client.