前景介绍
最近小伙伴们听歌的兴趣大涨，网抑云综合症已经遍布各地。
咱们再来抬高一波QQ音乐的热度吧。
土豪充绿钻 和 刷永久绿钻的除外(me🤣)
爬它！
目标：歌手列表
任务：将A到Z的歌手以及全部页数的歌存到本地和数据库
观察网页url结构
当我们进入网页时发现此时是一个无参数的html网页加载。
寻找我们想要拿到的位置寻找变化，但我们点击A开头的网页跳转时，发现 url 改变了，index 参数应该是首字母，page 参数应该是页数变化。
这样的话就减少一个找参数的时间啦。
找到XML
还是习惯的点开检查按键，找到首字母的作者提供的XML都需要什么参数，随便点点A-Z发现 XML 有一个请求蹦出来，里面返回了是个 json 数据集，都点开看看发现找到了每个作者的参数了。成功了一小半！
既然拿到了XML的网站，POST请求是一定的啦，接下来就该分析分析网站所需要的参数都是什么了，大致猜测一下，这么多数据中sign和data参数有点诡异，不像是正常的参数，加密参数也找到了。
破解sign加密参数
search 找一下sign都在哪里。因为sign应该是个变量，所以说在他后面加个=会查找的更精确一些。找到一个sign参数的位置，这应该是个JavaScript代码，那就应该是这里面了。点进去！
在JavaScript中找到了 sign 的位置，找到了一个JavaScript调用的网站，我们进去看看是什么代码在里面。
当我们进入网站之后，代码有点乱我们在线格式化一下看看里面是什么。
格式化代码后发现这个里面含有sign参数。这个应该是sign的加密算法，但是其中传了一个参数进入，我们需要了解一下他传了什么参数，这样我们的sign就出来了。
回到我们调用JavaScript网站的文件中，继续往下看，我们发现 sign 传数值就在他的下部。我们看到了传了个data给这个sign加密函数，点断点看看data参数是什么。这data值看的好眼熟，这不是一开始很奇怪那个参数data么。原来data弄出来了sign就能给出来的。
我们继续找刚才的sign。点击下一次跳转我们发现我们找到另一个函数在里面，产生了一种疑惑，这个函数是做什么的，他为什么会跳向这里。
那我们先看看我们格式化出来的JavaScript到底能不能运行吧。说不定能运行呢。
哦吼，能运行，那就好办了，看看他返回的参数到底是啥，在开头定义一个sign=null，将t返回给sign，再把sign打印出来。这是刚才的那个跳转过去的方法。
原来如此，那我们将sign调用一下加个()，我们就能发现sign的值就出现了。但我们重复运行发现我们无法得到他的加密值，因为这些都是一样的。
回想我们刚才说的话，他需要加一个data参数才可以获得加密参数，那好再改一下。
首先我们先下载一个python调用JavaScript的库。pip install PyExecJS
开始写python代码
import execjsdef get_sign(data):with open('a.js','r',encoding='utf-8') as f:text = f.read()js_data = pile(text)sign = js_data.call('get_sign',data)return signif __name__ == "__main__":data = '{"comm":{"ct":24,"cv":0},"singerList":{"module":"Music.SingerListServer","method":"get_singer_list","param":{"area":-100,"sex":-100,"genre":-100,"index":2,"sin":0,"cur_page":1}}}'sign = get_sign(data)print(data)print(sign)
这是多次调用代码的结果，发现data传入成功了。
获取歌手个数以及页数
个数其实一开始我们已经拿到了，只不过那时候没介绍，仔细的童鞋们应该是看到了总数到底为多少个。我们点开刚才的返回json结果就能看到total已经给出来当前的个数了。
现在该分析一下data参数，盲猜一通估计page和index都在data里面，要不然这个参数传不上去呀。好的分析一下data到底有啥，咱拿过来看看。data里面看到了get_singer_list这个应该是主要的东西。
# 这个是 A开头 第一页#{"comm":{"ct":24,"cv":0},"singerList":{"module":"Music.SingerListServer","method":"get_singer_list","param":{"area":-100,"sex":-100,"genre":-100,"index":1,"sin":0,"cur_page":1}}}# 这个是 B开头 第一页#{"comm":{"ct":24,"cv":0},"singerList":{"module":"Music.SingerListServer","method":"get_singer_list","param":{"area":-100,"sex":-100,"genre":-100,"index":2,"sin":0,"cur_page":1}}}# 这个是 B开头 第二页#{"comm":{"ct":24,"cv":0},"singerList":{"module":"Music.SingerListServer","method":"get_singer_list","param":{"area":-100,"sex":-100,"genre":-100,"index":2,"sin":80,"cur_page":2}}}# 这个是 B开头 第三页#{"comm":{"ct":24,"cv":0},"singerList":{"module":"Music.SingerListServer","method":"get_singer_list","param":{"area":-100,"sex":-100,"genre":-100,"index":2,"sin":160,"cur_page":3}}}
大致我们能分析出来。
字母的变化在 index 处，也就是A到Z以及后面的# 应该是一共27个在里面，也就是index从1到27我们需要传给他。页数的变化在 sin 这里，第一页是0，第二页就是80，第三页是160，冷静分析一下应该是从0开始以80为公差的等差数列。这个八十应该是代表每一页都含有八十个歌手。cur_page应该就是当前页数的意思。那咱们跟着sin一起改变。
那在这我们拿到了总数，加上每一页总共能展示多少，因为多出来的个数需要占一页才可以，我们使用向下取整。
获取作者名字以及id号
我们根据上述写出来爬虫代码后，就可以成功获取 json 的返回值了，在里面我们能看到一个歌手的参数一共有五个，其中 singer_mid 和 singer_name 是我们所需要的。拿到这两个值后可以进入网站下载当前歌手的歌曲。
寻找歌手的歌曲
我们随意点进去一个歌手，进去后寻找XML的网站，我在这里找好了是 getSingerSong 变量。
在这里能获取歌手的每首歌的所能拿到的结果。
我们看一下里面都需要什么参数，好像和上次的差不多哦。sign已经获取到了，data是给定的变量。单纯的data有点变化，但问题不大。那说明还是能正常访问这个XML的。
data中有点变化的位置就是 singerMid ，这个参数我们在刚才已经获取到了。直接在里面引用一下就好了。begin的参数是一个歌手歌的页数，num是一页中包括多少歌曲。其实我们传参数可以将这个参数改一下的。把num的值改到一个很大的值，我们就可以不需要改变begin的参数就能拿到所有的歌曲结果。
我们仔细找一下 json 里面的参数，点击音乐链接进入发现是/n/yqq/song/002MQlds19S8qy.html，我们能发现，在这个歌曲里面的 mid 参数就是每首歌的格式化位置。
寻找下载歌曲的m4a链接
我们点入播放中。寻找里面的m4a链接看看都包含什么参数，发现存在七个链接都是。但我们仔细一看歌曲的大小我们就会发现，前几个都是有问题的发包，一首歌怎么可能只有几kb呢。毫不犹豫点进去最后一个。
哦吼，这回参数不一样了哦。那我们在重新分析一下下吧别懒了。
我们先查找一下他给出来的一些包，看看能不能找到一个非加密参数出来。
果然，功夫不负有心人。vkey 就不是个加密参数！
破解参数前先学会"投机取巧"
我不知道刚才有没有仔细看这个位置，发现这个也是个很长的字符串，但是他很特殊，特殊到它和m4a的url是一样的。
为了让你们看到，我在这里把这俩写出来，发现到他们差了什么。不变的字符串前缀。。
# C400002wiewH40saXM.m4a?guid=9232644380&vkey=A6F8B706468C0ECFE0F8B6E5E8AAD783D5F852ED0CA66692EB1033B209080BE61208609BEBC2EAF66FA86AC887C8C9F03C02A152E2EF4E24&uin=0&fromtag=66# https://isure.stream./C400002wiewH40saXM.m4a?guid=9232644380&vkey=A6F8B706468C0ECFE0F8B6E5E8AAD783D5F852ED0CA66692EB1033B209080BE61208609BEBC2EAF66FA86AC887C8C9F03C02A152E2EF4E24&uin=0&fromtag=66
那我们先看看vkey到底需要什么参数给进去。其他参数还是都那些，还是差了一个data需要给进去的。咱们分析一下data都需要给啥吧。
# {"req":{"module":"CDN.SrfCdnDispatchServer","method":"GetCdnDispatch","param":{"guid":"9232644380","calltype":0,"userip":""}},"req_0":{"module":"vkey.GetVkeyServer","method":"CgiGetVkey","param":{"guid":"9232644380","songmid":["002MQlds19S8qy"],"songtype":[0],"uin":"0","loginflag":1,"platform":"20"}},"comm":{"uin":0,"format":"json","ct":24,"cv":0}}
大致分析了一下
guid是个无用参数。songmid 是歌曲的 mid，我们刚才已经获取了uin 需要加入一个qq号才可以获取，如果未登陆默认为0其他都是定死的参数
m4a文件是一个二进制文件。所以说我们写代码一定要写入二进制文件才可以。
代码优化
因为数据量过大，日常存入数据库因为数据下载量大，使用多进程爬取。将A-Z及#各开一个进程防止存入数据库在多线程阶段同时占用，上锁全部代码
crawl.py
#Python3.7 #encoding = utf-8import execjs,requests,math,os,threadingfrom urllib import parsefrom concurrent.futures import ThreadPoolExecutor,ProcessPoolExecutorfrom db import SQLsession,Songlock = threading.Lock()headers = {'User-Agent':'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36','Referer':'/portal/singer_list.html',}session = SQLsession()def get_sign(data):with open('./QQ音乐/get_sign.js','r',encoding='utf-8') as f:text = f.read()js_data = pile(text)sign = js_data.call('get_sign',data)return signdef myProcess():#把歌手按照首字母分为27类with ProcessPoolExecutor(max_workers = 2) as p:#创建27个进程for i in range(1,28):p.submit(get_singer_mid,i)def get_singer_mid(index):#index = 1-----27#打开歌手列表页面，找出singerList,找出所有歌手的数目,除于80,构造后续页面获取page歌手#找出mid, 用于歌手详情页data = '{"comm":{"ct":24,"cv":0},"singerList":'\'{"module":"Music.SingerListServer","method":"get_singer_list","param":'\'{"area":-100,"sex":-100,"genre":-100,"index":%s,"sin":0,"cur_page":1}}}'%(str(index))sign = get_sign(data)url = 'https://u./cgi-bin/musics.fcg?-=getUCGI6720748185279282&g_tk=5381'\'&sign={}'\'&loginUin=0&hostUin=0&format=json&inCharset=utf8&outCharset=utf-8'\'¬ice=0&platform=yqq.json&needNewCode=0'\'&data={}'.format(sign,parse.quote(data)) html = requests.get(url,headers = headers).json()total = html['singerList']['data']['total']#多少个歌手pages = int(math.floor(int(total)/80))#向下取整thread_number = pagesThread = ThreadPoolExecutor(max_workers = thread_number)sin = 0#分页迭代每一个字母下的所有页面歌手for page in range(1,pages+2):data = '{"comm":{"ct":24,"cv":0},"singerList":{"module":"Music.SingerListServer","method":"get_singer_list","param":{"area":-100,"sex":-100,"genre":-100,"index":%s,"sin":%s,"cur_page":%s}}}'%(str(index),str(sin),str(page))sign = get_sign(data)url = 'https://u./cgi-bin/musics.fcg?-=getUCGI6720748185279282&g_tk=5381'\'&sign={}'\'&loginUin=0&hostUin=0&format=json&inCharset=utf8&outCharset=utf-8'\'¬ice=0&platform=yqq.json&needNewCode=0'\'&data={}'.format(sign,parse.quote(data)) html = requests.get(url,headers = headers).json()sings = html['singerList']['data']['singerlist']for sing in sings:singer_name = sing['singer_name'] #获取歌手名字mid = sing['singer_mid'] #获取歌手midThread.submit(get_singer_data,mid = mid,singer_name = singer_name,)sin+=80#获取歌手信息def get_singer_data(mid,singer_name):#获取歌手mid,进入歌手详情页，也就是每一个歌手歌曲所在页面#找出歌手的歌曲信息页data = '{"comm":{"ct":24,"cv":0},"singerSongList":{"method":"GetSingerSongList","param":'\'{"order":1,"singerMid":"%s","begin":0,"num":10}'\',"module":"musichall.song_list_server"}}'%(str(mid))sign = get_sign(data)url = 'https://u./cgi-bin/musics.fcg?-=getSingerSong4707786209273719'\'&g_tk=5381&sign={}&loginUin=0'\'&hostUin=0&format=json&inCharset=utf8&outCharset=utf-8¬ice=0&platform=yqq.json&needNewCode=0'\'&data={}'.format(sign,parse.quote(data))html = requests.get(url,headers = headers).json()songs_num = html['singerSongList']['data']['totalNum']for number in range(0,songs_num,100):data = '{"comm":{"ct":24,"cv":0},"singerSongList":{"method":"GetSingerSongList","param":'\'{"order":1,"singerMid":"%s","begin":%s,"num":%s}'\',"module":"musichall.song_list_server"}}'%(str(mid),str(number),str(songs_num))sign = get_sign(data)url = 'https://u./cgi-bin/musics.fcg?-=getSingerSong4707786209273719'\'&g_tk=5381&sign={}&loginUin=0'\'&hostUin=0&format=json&inCharset=utf8&outCharset=utf-8¬ice=0&platform=yqq.json&needNewCode=0'\'&data={}'.format(sign,parse.quote(data))html = requests.get(url,headers = headers).json()datas = html['singerSongList']['data']['songList']for d in datas:sing_name = d['songInfo']['title']song_mid = d['songInfo']['mid']try:lock.acquire()session.add(Song(song_name = sing_name,song_singer = singer_name,song_mid = song_mid))mit()lock.release()print('commit')except:session.rollback()print('rollbeak')print('歌手名字：{}\t歌曲名字：{}\t歌曲ID：{}'.format(singer_name,sing_name,song_mid))download(song_mid,sing_name,singer_name)def download(song_mid,sing_name,singer_name):qq_number = '请在这里写你的qq号'try:qq_number = str(int(qq_number))except:raise 'qq号未填写'data = '{"req":{"module":"CDN.SrfCdnDispatchServer","method":"GetCdnDispatch"'\',"param":{"guid":"4803422090","calltype":0,"userip":""}},'\'"req_0":{"module":"vkey.GetVkeyServer","method":"CgiGetVkey",'\'"param":{"guid":"4803422090","songmid":["%s"],"songtype":[0],'\'"uin":"%s","loginflag":1,"platform":"20"}},"comm":{"uin":%s,"format":"json","ct":24,"cv":0}}'%(str(song_mid),str(qq_number),str(qq_number))sign = get_sign(data) url = 'https://u./cgi-bin/musics.fcg?-=getplaysongvkey27494207511290925'\'&g_tk=1291538537&sign={}&loginUin={}'\'&hostUin=0&format=json&inCharset=utf8&outCharset=utf-8¬ice=0'\'&platform=yqq.json&needNewCode=0&data={}'.format(sign,qq_number,parse.quote(data))html = requests.get(url,headers = headers).json()try:purl = html['req_0']['data']['midurlinfo'][0]['purl']url = 'http://119.147.228.27/amobile.music./{}'.format(purl)html = requests.get(url,headers = headers)html.encoding = 'utf-8'sing_file_name = '{} -- {}'.format(sing_name,singer_name)filename = './QQ音乐/歌曲'if not os.path.exists(filename):os.makedirs(filename)with open('./QQ音乐/歌曲/{}.m4a'.format(sing_file_name),'wb') as f:print('\n正在下载{}歌曲.....\n'.format(sing_file_name))f.write(html.content) except:print('查询权限失败，或没有查到对应的歌曲')if __name__ == "__main__":myProcess()
db.py
from sqlalchemy import Column,Integer,String,create_enginefrom sqlalchemy.orm import sessionmaker,scoped_sessionfrom sqlalchemy.ext.declarative import declarative_base#此处没有使用pymysql的驱动#请安装pip install mysql-connector-python#engine中的 mysqlconnector 为 mysql官网驱动engine = create_engine('mysql+mysqlconnector://root:root@localhost:3306/test?charset=utf8',max_overflow = 500,#超过连接池大小外最多可以创建的链接pool_size = 100,#连接池大小echo = False,#调试信息展示)Base = declarative_base()class Song(Base):__tablename__ = 'song'song_id = Column(Integer,primary_key = True,autoincrement = True)song_name = Column(String(64))song_ablum = Column(String(64))song_mid = Column(String(50))song_singer = Column(String(50))Base.metadata.create_all(engine)DBsession = sessionmaker(bind = engine)SQLsession = scoped_session(DBsession)
get_sign.js
this.window = this;var sign = null;!function(n, t) {"object" == typeof exports && "undefined" != typeof module ? module.exports = t() : "function" == typeof define && define.amd ? define(t) : (n = n || self).getSecuritySign = t()} (this,function() {"use strict";var n = function() {if ("undefined" != typeof self) return self;if ("undefined" != typeof window) return window;if ("undefined" != typeof global) return global;throw new Error("unable to locate global object")} ();n.__sign_hash_ = function(n) {function l(n, t) {var o = (65535 & n) + (65535 & t);return (n >> 16) + (t >> 16) + (o >> 16) << 16 | 65535 & o}function r(n, t, o, e, u, p) {return l((i = l(l(t, n), l(e, p))) << (r = u) | i >>> 32 - r, o);var i, r}function g(n, t, o, e, u, p, i) {return r(t & o | ~t & e, n, t, u, p, i)}function a(n, t, o, e, u, p, i) {return r(t & e | o & ~e, n, t, u, p, i)}function s(n, t, o, e, u, p, i) {return r(t ^ o ^ e, n, t, u, p, i)}function v(n, t, o, e, u, p, i) {return r(o ^ (t | ~e), n, t, u, p, i)}function t(n) {return function(n) {var t, o = "";for (t = 0; t < 32 * n.length; t += 8) o += String.fromCharCode(n[t >> 5] >>> t % 32 & 255);return o} (function(n, t) {n[t >> 5] |= 128 << t % 32,n[14 + (t + 64 >>> 9 << 4)] = t;var o, e, u, p, i, r = 1732584193,f = -271733879,h = -1732584194,c = 271733878;for (o = 0; o < n.length; o += 16) r = g(e = r, u = f, p = h, i = c, n[o], 7, -680876936),c = g(c, r, f, h, n[o + 1], 12, -389564586),h = g(h, c, r, f, n[o + 2], 17, 606105819),f = g(f, h, c, r, n[o + 3], 22, -1044525330),r = g(r, f, h, c, n[o + 4], 7, -176418897),c = g(c, r, f, h, n[o + 5], 12, 1200080426),h = g(h, c, r, f, n[o + 6], 17, -1473231341),f = g(f, h, c, r, n[o + 7], 22, -45705983),r = g(r, f, h, c, n[o + 8], 7, 1770035416),c = g(c, r, f, h, n[o + 9], 12, -1958414417),h = g(h, c, r, f, n[o + 10], 17, -42063),f = g(f, h, c, r, n[o + 11], 22, -1990404162),r = g(r, f, h, c, n[o + 12], 7, 1804603682),c = g(c, r, f, h, n[o + 13], 12, -40341101),h = g(h, c, r, f, n[o + 14], 17, -1502002290),r = a(r, f = g(f, h, c, r, n[o + 15], 22, 1236535329), h, c, n[o + 1], 5, -165796510),c = a(c, r, f, h, n[o + 6], 9, -1069501632),h = a(h, c, r, f, n[o + 11], 14, 643717713),f = a(f, h, c, r, n[o], 20, -373897302),r = a(r, f, h, c, n[o + 5], 5, -701558691),c = a(c, r, f, h, n[o + 10], 9, 38016083),h = a(h, c, r, f, n[o + 15], 14, -660478335),f = a(f, h, c, r, n[o + 4], 20, -405537848),r = a(r, f, h, c, n[o + 9], 5, 568446438),c = a(c, r, f, h, n[o + 14], 9, -1019803690),h = a(h, c, r, f, n[o + 3], 14, -187363961),f = a(f, h, c, r, n[o + 8], 20, 1163531501),r = a(r, f, h, c, n[o + 13], 5, -1444681467),c = a(c, r, f, h, n[o + 2], 9, -51403784),h = a(h, c, r, f, n[o + 7], 14, 1735328473),r = s(r, f = a(f, h, c, r, n[o + 12], 20, -1926607734), h, c, n[o + 5], 4, -378558),c = s(c, r, f, h, n[o + 8], 11, -574463),h = s(h, c, r, f, n[o + 11], 16, 1839030562),f = s(f, h, c, r, n[o + 14], 23, -35309556),r = s(r, f, h, c, n[o + 1], 4, -1530992060),c = s(c, r, f, h, n[o + 4], 11, 1272893353),h = s(h, c, r, f, n[o + 7], 16, -155497632),f = s(f, h, c, r, n[o + 10], 23, -1094730640),r = s(r, f, h, c, n[o + 13], 4, 681279174),c = s(c, r, f, h, n[o], 11, -358537222),h = s(h, c, r, f, n[o + 3], 16, -722521979),f = s(f, h, c, r, n[o + 6], 23, 76029189),r = s(r, f, h, c, n[o + 9], 4, -640364487),c = s(c, r, f, h, n[o + 12], 11, -421815835),h = s(h, c, r, f, n[o + 15], 16, 530742520),r = v(r, f = s(f, h, c, r, n[o + 2], 23, -995338651), h, c, n[o], 6, -198630844),c = v(c, r, f, h, n[o + 7], 10, 1126891415),h = v(h, c, r, f, n[o + 14], 15, -1416354905),f = v(f, h, c, r, n[o + 5], 21, -57434055),r = v(r, f, h, c, n[o + 12], 6, 1700485571),c = v(c, r, f, h, n[o + 3], 10, -1894986606),h = v(h, c, r, f, n[o + 10], 15, -1051523),f = v(f, h, c, r, n[o + 1], 21, -2054922799),r = v(r, f, h, c, n[o + 8], 6, 1873313359),c = v(c, r, f, h, n[o + 15], 10, -30611744),h = v(h, c, r, f, n[o + 6], 15, -1560198380),f = v(f, h, c, r, n[o + 13], 21, 1309151649),r = v(r, f, h, c, n[o + 4], 6, -145523070),c = v(c, r, f, h, n[o + 11], 10, -110379),h = v(h, c, r, f, n[o + 2], 15, 718787259),f = v(f, h, c, r, n[o + 9], 21, -343485551),r = l(r, e),f = l(f, u),h = l(h, p),c = l(c, i);return [r, f, h, c]} (function(n) {var t, o = [];for (o[(n.length >> 2) - 1] = void 0, t = 0; t < o.length; t += 1) o[t] = 0;for (t = 0; t < 8 * n.length; t += 8) o[t >> 5] |= (255 & n.charCodeAt(t / 8)) << t % 32;return o} (n), 8 * n.length))}function o(n) {return t(unescape(encodeURIComponent(n)))}return function(n) {var t, o, e = "0123456789abcdef",u = "";for (o = 0; o < n.length; o += 1) t = n.charCodeAt(o),u += e.charAt(t >>> 4 & 15) + e.charAt(15 & t);return u} (o(n))},function r(f, h, c, l, g) {g = g || [[this], [{}]];for (var t = [], o = null, n = [function() {return ! 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