downloadVkMusic.py

#!/usr/bin/python3

VK_APP_ID = 3763243
VK_PERMISSIONS_MASK = 8
REDIRECT_URL = 'https://oauth.vk.com/blank.html'

VK_AUTH_URL = 'https://oauth.vk.com/authorize?client_id=' + str(VK_APP_ID) + '&display=page&response_type=token&scope=' + str(VK_PERMISSIONS_MASK) + '&redirect_url=' + REDIRECT_URL
VK_AUDIO_GET_REQUEST = 'https://api.vk.com/method/audio.get?count=6000&v=5.27&access_token=%s'

import re
import requests
import json
import string
import urllib
import os.path
import sys

print ('WARNING: all files are downloaded into your current directory')
print ()
print ('Open %s in your browser' % VK_AUTH_URL)
print ('and print the page you are redirected to after you give the permissions:')
response = input('URL: ')

matcher = re.search('access_token=([^&]+)', response)
access_token = matcher.group(1)

audios = json.loads(requests.get(VK_AUDIO_GET_REQUEST % access_token).content.decode('utf-8'))['response']['items']

translit_table = {
    'а': 'a',
    'б': 'b',
    'в': 'v',
    'г': 'g',
    'д': 'd',
    'е': 'e',
    'ё': 'yo',
    'ж': 'zh',
    'з': 'z',
    'и': 'i',
    'й': 'y',
    'к': 'k',
    'л': 'l',
    'м': 'm',
    'н': 'n',
    'о': 'o',
    'п': 'p',
    'р': 'r',
    'с': 's',
    'т': 't',
    'у': 'u',
    'ф': 'f',
    'х': 'kh',
    'ц': 'ts',
    'ч': 'ch',
    'ш': 'sh',
    'щ': 'sch',
    'ъ': 'y',
    'ы': 'i',
    'ь': 'y',
    'э': 'e',
    'ю': 'yu',
    'я': 'ya',

    'А': 'A',
    'Б': 'B',
    'В': 'V',
    'Г': 'G',
    'Д': 'D',
    'Е': 'E',
    'Ё': 'Yo',
    'Ж': 'Zh',
    'З': 'Z',
    'И': 'I',
    'Й': 'Y',
    'К': 'K',
    'Л': 'L',
    'М': 'M',
    'Н': 'N',
    'О': 'O',
    'П': 'P',
    'Р': 'R',
    'С': 'S',
    'Т': 'T',
    'У': 'U',
    'Ф': 'F',
    'Х': 'Kh',
    'Ц': 'Ts',
    'Ч': 'Ch',
    'Ш': 'Sh',
    'Щ': 'Sch',
    'Ъ': 'Y',
    'Ы': 'I',
    'Ь': 'Y',
    'Э': 'E',
    'Ю': 'Yu',
    'Я': 'Ya',
}

valid_chars = '-_.() %s%s' % (string.ascii_letters, string.digits)
valid_chars = frozenset(valid_chars)


index = 1
total = len(audios)
for audio in audios:
    name = audio['artist'] + ' - ' + audio['title']
    name = ''.join(translit_table[c] if c in translit_table else c for c in name)
    name = ''.join(c for c in name if c in valid_chars)
    name = (name[:72] + '...') if len(name) >= 75 else name
    sys.stdout.write ('Downloading "%s" (%d/%d)... ' % (name, index, total))
    index += 1
    filename = name + '.mp3'
    if os.path.isfile(filename):
        print ('SKIP, file exists')
        continue
    stream = urllib.request.urlopen(audio['url'])
    with open(name + '.mp3', 'b+w') as f:
        f.write(stream.read())
    print ('DONE')