How to send audio wav file generated at the server to client browser? [closed]

Question

I'm using flask for my application. I would like to send an audio wav file from the server side to client with or without saving the wav file on the disk.

Any idea how to do this ?

Answer 1

You can create an in-memory file with StringIO:

from cStringIO import StringIO
from flask import make_response

from somewhere import generate_wav_file  # TODO your code here

@app.route('/path')
def view_method():

    buf = StringIO()

    # generate_wav_file should take a file as parameter and write a wav in it
    generate_wav_file(buf) 

    response = make_response(buf.getvalue())
    buf.close()
    response.headers['Content-Type'] = 'audio/wav'
    response.headers['Content-Disposition'] = 'attachment; filename=sound.wav'
    return response

If you have file on disk:

from flask import send_file

@app.route('/path')
def view_method():
     path_to_file = "/test.wav"

     return send_file(
         path_to_file, 
         mimetype="audio/wav", 
         as_attachment=True, 
         attachment_filename="test.wav")