download-check.py

import requests
import os
import subprocess

url = 'http://ftp.stage.mozaws.net/pub/firefox/candidates/61.0b15-candidates/build9/win64/en-US/buildhub.json'
stuff = requests.get(url).json()
# print(stuff['download'])
download_url = stuff['download']['url']
r = requests.get(download_url, stream=True)
filename = os.path.basename(download_url)
with open(filename, 'wb') as f:
    for chunk in r.iter_content(chunk_size=1024):
        if chunk: # filter out keep-alive new chunks
            f.write(chunk)

# print(r.headers)
print('JSON SIZE', stuff['download']['size'])
print('OS SIZE  ', os.stat(filename).st_size)
print('JSON MIME', stuff['download']['mimetype'])
mime = subprocess.check_output(['mime', filename]).decode('utf-8').strip()
print('OS MIME  ', mime)

Output when I run this:

▶ p3 ~/dev/MOZILLA/BUILDHUB/download-check.py
JSON SIZE 40992536
OS SIZE   40992536
JSON MIME application/octet-stream
OS MIME   application/octet-stream

Woohoo!

🎼 to my 👂 👂