抓取百度音乐频道歌曲url

参考了 http://blog.csdn.net/banguijun/article/details/11815263 

后写了一个抓取fm音乐url的模块，得到所有频道歌曲的url。缺点是百度会变更url地址，失效后需要重新获取。话不多说上代码：

# -*- coding: UTF-8 -*-
'''
Created on 2013-12-3
从百度的频道中抓取歌曲的下载地址
@author:
'''
import urllib
import json
SAVEPATH='/home/gfc/musiclistnew.txt' # defines the storage location 定义存储位置 用时要修改为自己的文件存放地址
getlisturl = "http://fm.baidu.com/dev/api/?tn=playlist&format=json&id=" #get list url   获取频道列表url
getmusicrealurl = 'http://music.baidu.com/data/music/fmlink?type=mp3&rate=320&songIds=' #获取歌曲地址url

html = urllib.urlopen("http://fm.baidu.com/").read().decode("utf-8")
start = html.find("{", html.find("rawChannelList"))  # find javascript code of the channel list urls
end = html.find(";", start)
listjson = html[start:end].strip()  # cut spaces to get channel list json
data = json.loads(listjson)  # parse json
channel_id_list = []
for item in data['channel_list']:
#     print "Channel Name:\t", item['channel_name'], "Category:\t", item['cate']
    channel_id_list.append(item['channel_id'])  # get channel id

musiclistfile = open(SAVEPATH, 'w') # open file

for channel_id in channel_id_list:#循环频道列表
    musiclist = urllib.urlopen(getlisturl + channel_id).read().decode("utf-8")
    musicidslist = json.loads(musiclist)['list']
    musicUrlList = []
    for songid in musicidslist:#遍历频道歌曲列表
        getMusicUrls = urllib.urlopen(getmusicrealurl + str(songid['id'])).read()
        urlmusic = json.loads(getMusicUrls)
        musicUrl = urlmusic['data']['songList']
        for songlink in musicUrl:#取得歌曲url并写入文本文件
            musiclistfile.write(songlink['songLink'])
            musiclistfile.write('\n')   
musiclistfile.close()