爬虫下载QQ音乐：获取所有歌手-每个歌手的专辑-每个专辑里的歌曲

# coding=utf-8
# !/usr/bin/env python
'''
    author: dangxusheng
    desc  : 稍微有点难度，需要多次请求获取key
    date  : 2018-08-29
'''

# 导入模块
import requests
from lxml import etree
import json
import time

# 准备全局变量
headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.63 Safari/537.36 Qiyu/2.1.1.1",
    "Referer": "https://y.qq.com/portal/player.html"
}

# 获取歌手列表
# https://y.qq.com/portal/singer_list.html
def get_singer_list():
    url = "https://u.y.qq.com/cgi-bin/musicu.fcg?callback=getUCGI25738961582047115&g_tk=5381&jsonpCallback=getUCGI25738961582047115&loginUin=0&hostUin=0&format=jsonp&inCharset=utf8&outCharset=utf-8&notice=0&platform=yqq&needNewCode=0&data=%7B%22comm%22%3A%7B%22ct%22%3A24%2C%22cv%22%3A10000%7D%2C%22singerList%22%3A%7B%22module%22%3A%22Music.SingerListServer%22%2C%22method%22%3A%22get_singer_list%22%2C%22param%22%3A%7B%22area%22%3A-100%2C%22sex%22%3A-100%2C%22genre%22%3A-100%2C%22index%22%3A-100%2C%22sin%22%3A0%2C%22cur_page%22%3A1%7D%7D%7D"
    headers['Referer'] = "https://y.qq.com/portal/singer_list.html"
    ie = requests.session()
    rep = ie.get(url, headers=headers)
    html = rep.content.decode('utf-8')[25:-1]
    singer_list = json.loads(html)['singerList']['data']['singerlist']
    ls = []
    for singer in singer_list:
        singer_mid = singer['singer_mid']
        singer_name = singer['singer_name']
        singer_pic = singer['singer_pic']
        ls.append({'singer_mid': singer_mid, "singer_name": singer_name, "singer_pic": singer_pic})
    return ls
    # print(ls)
    # exit()

# 获取专辑列表
def get_album_list(singer_mid=''):
    url = "https://u.y.qq.com/cgi-bin/musicu.fcg?callback=getUCGI2613146679247198&g_tk=5381&jsonpCallback=getUCGI2613146679247198&loginUin=0&hostUin=0&format=jsonp&inCharset=utf8&outCharset=utf-8&notice=0&platform=yqq&needNewCode=0&data=%7B%22singerAlbum%22%3A%7B%22method%22%3A%22get_singer_album%22%2C%22param%22%3A%7B%22singermid%22%3A%22" + singer_mid + "%22%2C%22order%22%3A%22time%22%2C%22begin%22%3A0%2C%22num%22%3A5%2C%22exstatus%22%3A1%7D%2C%22module%22%3A%22music.web_singer_info_svr%22%7D%7D"
    headers['Referer'] = "https://y.qq.com/n/yqq/singer/" + singer_mid + ".html"
    ie = requests.session()
    rep = ie.get(url, headers=headers)
    html = rep.content.decode('utf-8')[24:-1]
    ablum_list = json.loads(html)['singerAlbum']['data']['list']
    ls = []
    for item in ablum_list:
        album_mid = item['album_mid']
        album_name = item['album_name']
        singer_mid = item['singer_mid']
        singer_name = item['singer_name']
        ls.append(
            {'album_mid': album_mid, 'album_name': album_name, 'singer_mid': singer_mid, 'singer_name': singer_name})
    return ls

# 根据专辑ID下载
def download_music_by_albumid(albummid='', singername=''):
    # albummid = "001mTkmb4GJlh4"
    url = "https://c.y.qq.com/v8/fcg-bin/fcg_v8_album_info_cp.fcg?albummid=" + albummid + "&g_tk=5381&jsonpCallback=albuminfoCallback&loginUin=0&hostUin=0&format=jsonp&inCharset=utf8&outCharset=utf-8&notice=0&platform=yqq&needNewCode=0"
    headers['Referer'] = "https://y.qq.com/portal/player.html"
    ie = requests.session()
    rep = ie.get(url, headers=headers)
    html = rep.content.decode('utf-8')[19:-1]
    song_list = json.loads(html)['data']['list']
    for song in song_list:
        song_name = song['songname']
        song_mid = song['songmid']
        get_key_url = "https://u.y.qq.com/cgi-bin/musicu.fcg?callback=getplaysongvkey0996617262271613&g_tk=5381&jsonpCallback=getplaysongvkey0996617262271613&loginUin=0&hostUin=0&format=jsonp&inCharset=utf8&outCharset=utf-8&notice=0&platform=yqq&needNewCode=0&data=%7B%22req_0%22%3A%7B%22module%22%3A%22vkey.GetVkeyServer%22%2C%22method%22%3A%22CgiGetVkey%22%2C%22param%22%3A%7B%22guid%22%3A%228216405924%22%2C%22songmid%22%3A%5B%22" + song_mid + "%22%5D%2C%22songtype%22%3A%5B0%5D%2C%22uin%22%3A%220%22%2C%22loginflag%22%3A1%2C%22platform%22%3A%2220%22%7D%7D%2C%22comm%22%3A%7B%22uin%22%3A0%2C%22format%22%3A%22json%22%2C%22ct%22%3A20%2C%22cv%22%3A0%7D%7D"
        rep = ie.get(get_key_url, headers=headers)
        html = rep.content.decode('utf-8')[32:-1]
        data = json.loads(html)['req_0']['data']
        download_url_1 = data['sip'][0]
        download_url_2 = data['midurlinfo'][0]['purl']
        filename = data['midurlinfo'][0]['filename']
        url = download_url_1 + download_url_2
        rep = ie.get(url, headers=headers, stream=True)
        with open('./qqmusic/%s' % (song_name + "-" + singername + "-" + filename), 'wb') as file:
            for byte_data in rep.iter_content(1024):
                file.write(byte_data)
        print('《%s》 下载成功！' % song_name)
        time.sleep(2)

# 入口函数
if __name__ == '__main__':
    # 先获取歌手列表
    ls = get_singer_list()
    for singer in ls:
        # 获取歌手的专辑列表
        album_list = get_album_list(singer['singer_mid'])
        singer_name = singer['singer_name']
        # 下载专辑的所有歌曲
        for album in album_list:
            download_music_by_albumid(album['album_mid'], singer_name)
            time.sleep(2)
    exit()