python 下载虾米音乐

#!/usr/bin/env python2

# coding:utf-8

import urllib

import re

import sys

import urllib2
# xml => http://www.xiami.com/widget/xml-single/sid/1769215777
# string = "5h3%..i%2323F27%_3ueb5cc554e525-ntA2fx.2%9F211_5l%ty5d227E4-E8E%ut%FiicF2532759E.3h%1%7b7261%4%5lp2mlao9F25%6738mF_3654e7884585El%F5emm52%529774pakDeE98%5a%E%E-"
def parse_location(location_str):

    row = int(location_str[0])

    encrypt_location = location_str[1:]

    enc_loc_len = len(encrypt_location)

    column = enc_loc_len / row

    remainder = enc_loc_len % row

    loc_matrix = []

    index = 0

    for i in range(0, remainder):

        loc_matrix.append(encrypt_location[index: index + column + 1])

        index += column + 1

    for i in range(0, row - remainder):

        loc_matrix.append(encrypt_location[index: index + column])

        index += column

    location = ‘‘

    for j in range(0, column + 1):

        for i in range(0, row):

            if len(loc_matrix[i]) > j:

                location += loc_matrix[i][j]

    location = urllib.unquote(location).replace(‘^‘,‘0‘)

    return location
#print parse_location(string)
def main(url):

    #print url

    xml = urllib2.urlopen(url).read()

    en_url = re.findall("(?<=<location><!\[CDATA\[).*?(?=]]></location>)",xml)

    print parse_location(en_url[0])
if __name__ == "__main__":

    if len(sys.argv) != 2:

        print u"无效的参数，它应该像这个样子：http://www.xiami.com/song/3284034?spm=a1z1s.7154410.1996860142.3.LxxgQW"

    else:

        m = re.search("(?<=http://www.xiami.com/song/)\d*?(?=\?spm=)",sys.argv[1])

        if m:

            main("http://www.xiami.com/widget/xml-single/sid/"+m.group())

        else:

            print u"无效的参数，它应该像这个样子：http://www.xiami.com/song/3284034?spm=a1z1s.7154410.1996860142.3.LxxgQW"

python 下载虾米音乐