下载豆瓣加心歌曲，参考http://www.isnowfy.com/download-doubanfm-songs/ ， 由于ssid查询接口（http://dbfmdb.sinaapp.com/api/song.php?sid=%s）被封，已经下载不到歌曲了。

download_mp3.py

#! /usr/bin/env python
# -*- coding: utf-8 -*-

from bs4 import BeautifulSoup
import requests
import eyed3
import re
import urllib
import os

num_p = re.compile(r'(\d+)')
songs_dir = 'songs'
base_url = 'http://douban.fm/j/mine/playlist?type\
=n&sid=&pt=0.0&channel=0&from=mainsite'
songinfo_url = 'http://dbfmdb.sinaapp.com/api/song.php?sid=%s'
invalid = ['/', '\\', ':', '*', '?', '"', '<', '>', '|']

user_agent = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) \
AppleWebKit/537.31 (KHTML, like Gecko) \
Chrome/26.0.1410.65 Safari/537.31"
headers = {"User-Agent": user_agent}


def valid_filename(s):
    return filter(lambda x: x not in invalid, s)


def cookie_prase(cookie):
    cookies = {}
    cookie_list = cookie.split("; ")
    for item in cookie_list:
        key_value = item.split("=")
        cookies[key_value[0]] = key_value[1]
    return cookies


def get_songs_information(sid):
    song_info_req = requests.get((songinfo_url % sid), headers=headers)
    detail = song_info_req.json()
    requests.get('http://douban.fm?start=%sg%sg' %
                 (sid, detail['ssid']))
    song_req = requests.get(base_url, headers=headers)
    ret = song_req.json()
    return ret['song']


def download(song):
    try:
        os.mkdir(songs_dir)
    except:
        pass
    filename = '%s-%s.mp3' % (valid_filename(song['artist']),
                              valid_filename(song['title']))
    filepath = os.path.join(songs_dir, filename)
    if os.path.exists(filepath):
        return
    urllib.urlretrieve(song['url'], filepath)
    picname = song['picture'][1+song['picture'].rindex('/'):]
    picpath = os.path.join(songs_dir, picname)
    urllib.urlretrieve(song['picture'].replace('mpic', 'lpic'), picpath)
    tag = eyed3.Tag()
    tag.link(filepath)
    tag.header.setVersion(eyed3.ID3_V2_3)
    tag.encoding = '\x01'
    tag.setTitle(song['title'])
    tag.setAlbum(song['albumtitle'])
    tag.setArtist(song['artist'])
    tag.setDate(song['public_time'])
    tag.addImage(3, picpath)
    os.remove(picpath)
    tag.update()


def get(myurl, cookies):
    list_req = requests.get(myurl, headers=headers, cookies=cookies)
    list_soup = BeautifulSoup(list_req.content)
    for div_tag in list_soup.findAll('div', class_='info_wrapper'):
        p_tag = div_tag.find('div', class_='song_info').findAll("p")
        sid = div_tag.find('div', class_='action')['sid']
        try:
            print "song:%s\nsinger:%s\nalbum:%s" % (
                  p_tag[0].string, p_tag[1].string, p_tag[2].a.string)
        except:
            print "song..."
        mark = False
        try:
            for j in range(10):
                songs = get_songs_information(sid)
                for song in songs:
                    if sid == song['sid']:
                        download(song)
                        mark = True
                        break
                if mark:
                    break
            if mark:
                print 'succeed!\n\n'
            else:
                print 'fail!\n\n'
        except Exception as e:
            print e.message+'\n'


def main():
    url = 'http://douban.fm/mine?start=%d&type=liked'
    cookie = raw_input('cookie:')
    cookies = cookie_prase(cookie)
    print 'you should enter the pages you want to download'
    page0 = int(raw_input('page from:'))
    page1 = int(raw_input('page to:'))
    for i in range(page1-page0+1):
        get(url % ((i+page0-1)*15), cookies)


if __name__ == '__main__':
    main()