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网易云音乐评论爬虫实战：破解加密接口抓取数据

news 2026/8/17 16:03:34

一、接口分析：找准评论数据请求入口

在抓取网易云音乐歌曲评论时，我们不难发现，页面并不会随着翻页刷新跳转，评论的加载属于异步AJAX请求。这类接口有一个明显特点：接口地址固定不变，分页切换完全依靠请求载荷中的参数控制，无需更换请求URL，这也是当下主流网站动态加载数据的常见实现方式。想要顺利拿到完整的评论数据，第一步就是吃透接口的加密规则，破解前端加密参数，还原完整的请求逻辑，才能精准构造出平台认可的合法请求载荷，顺利打通数据抓取的关键环节。

二、核心加密JS代码还原

网易云音乐为了防止数据被随意爬取，对评论接口做了严格的参数加密处理，直接请求接口会被拒绝访问。想要攻克这个难点，我们需要先还原前端的加密逻辑，拿到生成params和encSecKey这两个核心校验参数的代码，这也是整个爬虫能否跑通的关键所在。我们通过分析网页源码，还原出完整的加密函数，直接复用这套代码，即可完成加密参数的生成，省去手动逆向分析的繁琐步骤，具体代码如下：

functiona(a){vard,e,b="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789",c="";for(d=0;a>d;d+=1)e=Math.random()*b.length,e=Math.floor(e),c+=b.charAt(e);returnc}functionb(a,b){varc=CryptoJS.enc.Utf8.parse(b),d=CryptoJS.enc.Utf8.parse("0102030405060708"),e=CryptoJS.enc.Utf8.parse(a),f=CryptoJS.AES.encrypt(e,c,{iv:d,mode:CryptoJS.mode.CBC});returnf.toString()}functionc(a,b,c){vard,e;returnsetMaxDigits(131),d=newRSAKeyPair(b,"",c),e=encryptedString(d,a)}functiond(d,e,f,g){varh={},i=a(16);returnh.encText=b(d,g),h.encText=b(h.encText,i),h.encSecKey=c(i,e,f),h}functione(a,b,d,e){varf={};returnf.encText=c(a+e,b,d),f}window.asrsea=d,window.ecnonasr=e// 构造请求参数varpageNo='1'varstr=`{"rid":"R_SO_4_2682113703","threadId":"R_SO_4_2682113703","pageNo":"${pageNo}","pageSize":"20","cursor":"-1","offset":"0","orderType":"1","csrf_token":"df9a3fb556b47931eeec5c5eb9faac9b"}`varbVA3x=window.asrsea(str,'010001','00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7','0CoJUm6Qyw8W8jud');// 生成最终请求载荷vare4i={params:bVA3x['encText'],encSecKey:bVA3x['encSecKey']}console.log(e4i);

三、Python爬虫代码实现

搞定前端加密逻辑之后，我们借助Python的requests库模拟浏览器发送请求，把JS脚本生成的加密参数，直接放入请求的data字段中作为载荷，再搭配完整的请求头和Cookie信息，伪装成正常的网页访问，就能顺利通过平台的校验，调用接口并获取返回的评论JSON数据。完整的Python代码如下，这套代码适配固定接口地址，后续想要翻页抓取，只需要修改对应分页参数即可，上手十分简单：

importrequests# 请求Cookie，维持登录状态cookies={'vinfo_n_f_l_n3':'3916ff44beb0c078.1.0.1757143646311.0.1757143808916','_ga':'GA1.1.303110697.1757770466','_clck':'1l10bbd%5E2%5Efza%5E0%5E2082','_ga_C6TGHFPQ1H':'GS2.1.s1757770465$o1$g1$t1757770693$j60$l0$h0','_iuqxldmzr_':'32','_ntes_nnid':'1ee47c1a495259c0598a10bf662afb17,1757998978281','_ntes_nuid':'1ee47c1a495259c0598a10bf662afb17','NMTID':'00Onmu3maG4d-bidkIqvMR7jmYMoK0AAAGZUOeSwA','WEVNSM':'1.0.0','WNMCID':'ixgtne.1757998979571.01.0','WM_TID':'xSejT%2BxV169FUVUARFLC0mdBuTqCwgVE','sDeviceId':'YD-QZLe%2FrgGqQ1ARxURVUaHgnYMn5zRcAzJ','ntes_utid':'tid._.GaFvf4nQEeZFB1EBBAKSwiZYi9jUcF2I._.0','__snaker__id':'QPd9674UKVC6UyD0','ntes_kaola_ad':'1','__csrf':'df9a3fb556b47931eeec5c5eb9faac9b','WM_NI':'kK23WUdxhv5GPG3fEMO2OvOADLnrSQX%2FI1qKL%2FiF6qWmCvjqR79%2By3%2FnAONLuYrt3o5WWIMJovb0NQiglc5XxIdE0aJCrrxWNX8vxbZsmkjBieN6SCxdQu3Qy0XgFxPlckE%3D','WM_NIKE':'9ca17ae2e6ffcda170e2e6eeb3d760afe9bba2c240b4e78ab7d45b979e9a87d2728696c0b4fb7daba985b5fb2af0fea7c3b92aa995fed4d65fa8a8a897b84d9499fd87c8478dee8197ce4b8894a293d25b9cf187d2f44190f1a7a7b57b95b38d97e97b92e9f7ccfc39edb28fb0cd48b787be95b265f78999aad042adaaaed1cd5babb9a484b854bc97aca6b36b8a9dbe93fb5d8e88f897fb6a9aada38ce94aabbb82d7d249bcbc9f96b25bbbf09888c57494b4ad8cc837e2a3','gdxidpyhxdE':'Lr%5Cm7yjN0baYEslbOj70BUDx%2BaSZjyognN6TZ1qp4uNlg%2B7uwWfuXHxCZQ0koz%5CM6QC8Z87kvmw7Vq23kZMRAGPjo3tT0Za37oGUh6v95wvQOX8d9k9dPeixk7XVIMVownl8i2VoBNvmZKk2%2F4HeHBBnUv%2B5X5Qhd5gsHVfq52vpWnTA%3A1761309901295','__csrf':'2e43ce8440e8205e4ff136f3bee8a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nkA34tOD5jlNrlto0vr%5CFq%5C1QSBOsUNotpH5B9uX3DK%5C1yO0tjI4pe%2Bkvi3rPSugdDD4DbpD%2Bpq%5CJ7FJ%5CmRrTorD3ZNHTVSehKch8St0xVd%2BXvBdVmGwmz09dmwVbyeiFRjy%2F8sCsqQivwfSPvGFBnE5khdkmCIn8HrJOnaSYSUDIJxa%3A1761313070855',}# 请求头，模拟浏览器访问，规避基础反爬headers={'accept':'*/*','accept-language':'zh-CN,zh;q=0.9','cache-control':'no-cache','content-type':'application/x-www-form-urlencoded','nm-gcore-status':'1','origin':'https://music.163.com','pragma':'no-cache','priority':'u=1, i','referer':'https://music.163.com/song?id=2682113703','sec-ch-ua':'"Chromium";v="140", "Not=A?Brand";v="24", "Google Chrome";v="140"','sec-ch-ua-mobile':'?0','sec-ch-ua-platform':'"Windows"','sec-fetch-dest':'empty','sec-fetch-mode':'cors','sec-fetch-site':'same-origin','user-agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36',}# 接口公共参数params={'csrf_token':'df9a3fb556b47931eeec5c5eb9faac9b',}# 加密后的请求载荷，替换为JS生成的最新参数即可data={"params":'LuinkKIvOA23xCKsaM72y+ok/qhQ/UH7oR1u5yjTzzv3TqaZAitAVLZZ0p93HupMAJpIo9Ik1JsGPj1Gj4CItoARiQrkpCqjT4qa4KHZqFRQV6OnEcCfgidjiaDj/SLasLb38s2qtj+oWtxLclwUIAni4Smc7wZLNISUGfmzOlkG+NOqJ5ORwUdRiqeP1hzcE94NsNi7rHMAQww/XPS09AOcwPxOeGlh0ueQCrTisKhLoiCvBF9OaOW4Y+Lp/U458dSxr855EEDbmK23VGZEv5Kqsrnn78ZIs1f83Apcayv92NgyKwCi0mcH5yykHXaM8W27L8nUlk8dLbMFIv0CcM4rYnSW8ahhTJYSm8HVKVo=',"encSecKey":'c023f645a6815df0d22b792757ed5d414afd3874242432e5b7df4bde40d1113b1c4e1217de5c38e40612c866136321c241719197f9225d86d2bda01151f1921943a9b8a0a3a494793855c4603ce64db8108d1f92b2737bfbfb41cc4696e61a20a0af8d8a216ebc00cd2e5e20bdc76b73a190a615efe31d43e9b9f7102fbb78ee'}# 发送POST请求，获取评论数据response=requests.post('https://music.163.com/weapi/comment/resource/comments/get',params=params,cookies=cookies,headers=headers,data=data,)# 打印返回的JSON数据，包含评论内容、发布时间等信息print(response.text)

四、数据解析与分页思路

接口成功响应后，返回的是标准规整的JSON格式数据，里面完整包含了当前页码下的所有评论内容、用户昵称、发布时间、点赞数量、评论楼层等详细信息，数据结构清晰易懂。我们只需要借助Python自带的json库，对返回的数据进行加载和解析，就能精准提取出自己想要的字段，后续还可以做数据保存、筛选、统计等后续处理。

得益于接口固定的特性，分页爬取的逻辑十分简单，只需要修改JS代码中的pageNo参数，重新生成一组加密载荷，再替换Python代码中data里的对应参数，即可循环爬取多页评论，实现批量抓取。整个流程无需改动URL、请求头和Cookie，仅调整分页参数就能实现翻页，新手也能快速上手，轻松掌握动态接口的爬取技巧。