从 fid 计算网易云音乐文件的 CDN 地址

fid2url.py

#!/usr/bin/env python2

import argparse
import md5
from base64 import urlsafe_b64encode as b64enc

parser = argparse.ArgumentParser(description='convert fid to audio file url')
parser.add_argument('fid', action='store', help='fid')
args = parser.parse_args()

def encrypt(data):
    return ''.join([ chr(ord(a) ^ ord(b)) for a, b in zip(data, "3go8&$8*3*3h0k(2)2" * (len(data) / 18 + 1)) ])

digest = md5.new(encrypt(args.fid)).digest()

print "http://m%d.music.126.net/%s/%s.mp3" % (2, b64enc(digest), args.fid)