humble_download.py

# coding: utf-8

import requests
import json
import os

base_url = 'https://www.humblebundle.com/api/v1/order/{download_key}'

# Get this one from the bundle page url
download_key = ''

# Get this one inspecting the headers of the bundle page
cookie_auth = {'_simpleauth_sess': ''}

url = base_url.format(download_key=download_key)
os.makedirs(download_key, exist_ok=False)

r = requests.get(url, cookies=cookie_auth)

data = json.loads(r.text)

subproducts = [sub for sub in data['subproducts'] if len(sub['downloads']) > 0]

for subp in subproducts:
    for book in subp['downloads']:
        book_name = book['machine_name']
        print(book_name)
        for struct in book['download_struct']:
            try:
                url_down = struct['url']['web']

                file_name = url_down.split('?')[0].split('/')[-1]
                comp_file_name = os.path.join(download_key, file_name)

                r_pdf = requests.get(url_down, stream=True)
                handle = open(comp_file_name, 'wb')
                for chunk in r_pdf.iter_content(chunk_size=512):
                    if chunk:  # filter out keep-alive new chunks
                        handle.write(chunk)
            except KeyError:
                pass