Django/Python: How to read a file and validate that it is an audio file? [duplicate]

Answer 1

An alternative to the other posted answer which does header parsing. This means someone could still include other data behind a valid header.

Is to verify the whole file which costs more CPU but also has a stricter policy. A library that can do this is python audiotools and the relevant API method is AudioFile.verify.

Used like this:

import audiotools

f = audiotools.open(filename)
try:
    result = f.verify()
except audiotools.InvalidFile:
    # Invalid file.
    print("Invalid File")
else:
    # Valid file.
    print("Valid File")

A warning is that this verify method is quite strict and can actually flag badly encoded files as invalid. You have to decide yourself if this is a proper method or not for your use case.