python爬虫、某云音乐直链爬取

1、通过浏览器抓包分析，寻找音乐直链所在的api

F12打开开发者工具，然后随便播放一首，在Network的XHR中寻找歌曲的直链，最终发现在v1?csrf_token=中返回了歌曲的地址。将链接在浏览器中打开，发现果然是该音乐的下载地址。

2、分析headers

① POST请求

② 携带两个加密参数

3、分析加密参数

寻这两个加密参数的加密规则，通过跟栈的方式一步步找到加密函数所在位置

进入第一个栈，格式化代码，在光标亮起的地方打上断点，然后点击播放按钮，就进入了断点，在右边Local中可以看到一些参数的值，我们要访问的url是v1?csrf_token=，而右边中url也是，正确进入断点

在右边看到e中已经携带了参数并且已经加密了，所以继续跟栈，每进一个栈就在光标亮起的地方打上断点，重新刷新页面，点击右上角让页面一步一步加载，直至参数中url为v1?csrf_token=，然后在右边看参数是否加密，最终在下图栈中发现了加密函数以及未加密时的参数

将加密函数所在位置打上断点，取消其他断点，然后重新点击播放按钮进入该断点

加密函数如下：

var bUM0x = window.asrsea(JSON.stringify(i0x), bsB6v(["流泪", "强"]), bsB6v(WX8P.md), bsB6v(["爱心", "女孩", "惊恐", "大笑"]));

将函数中四个参数在控制台输出

换一首歌曲

发现四个参数只有第一个是变化的，所以固定后三个参数

bsB6v(["流泪", "强"]) = '010001'bsB6v(WX8P.md) =  '00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7'bsB6v(["爱心", "女孩", "惊恐", "大笑"])= '0CoJUm6Qyw8W8jud'

分析一下第一个参数

JSON.stringify(i0x) = '{"ids":"[1859245776]","level":"standard","encodeType":"aac","csrf_token":""}'

可以发现，其中只有ids是变化的，并且ids就是歌曲的ID

4、JS代码获取

进入window.asrsea函数中，将函数所在的位置JS代码（包含该函数的一整个大括号括起来的位置）扣下来在VScode中进行调试。

!function() {function a(a) {var d, e, b = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", c = "";for (d = 0; a > d; d += 1)e = Math.random() * b.length,e = Math.floor(e),c += b.charAt(e);return c}function b(a, b) {var c = 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});return f.toString()}function c(a, b, c) {var d, e;return setMaxDigits(131),d = new RSAKeyPair(b,"",c),e = encryptedString(d, a)}function d(d, e, f, g) {var h = {}, i = a(16);return h.encText = b(d, g),h.encText = b(h.encText, i),h.encSecKey = c(i, e, f),h}function e(a, b, d, e) {var f = {};return f.encText = c(a + e, b, d),f}window.asrsea = d,window.ecnonasr = e
}();

在代码底部加入输出，进行调试

D = '{"ids":"[1859245776]","level":"standard","encodeType":"aac","csrf_token":""}',
E  = '010001',
F =  '00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7',
G = '0CoJUm6Qyw8W8jud';
var result = window.asrsea(D,E,F,G);
console.log(result);

出现一个错误，

Uncaught ReferenceError: window is not defined

在代码开头加上

var window = this;

继续调试，又出现一个错误

Uncaught ReferenceError: CryptoJS is not defined

这个问题说明JS代码没有扣全，缺啥补啥——在刚才扣的JS文件中搜索CryptoJS，从最开始的搜索结果的位置到扣到最后一个搜索结果所在的位置（12132行-13266行）。调试运行，成功。

{encText: '9Qd/nWw89fIpw89cePXtnmLFDJWO852BbpkDsM7P7W+R…1fdbOIaP4MDzeRxwrOTBFgg6E/Nj8mvkbXaNQNKwzg==', encSecKey: 'dedb720e61fda42723c4d3a532e505b851a9e5cd958…ba3a9552dd4467aaa0120e08fa450a92c357826f16d'}

5、写python，调用JS

在pycharm 中新建一个js文件，将调试好的代码粘贴

window = this;
var CryptoJS = CryptoJS || function(u, p) {var d = {}, l = d.lib = {}, s = function() {}, t = l.Base = {extend: function(a) {s.prototype = this;var c = new s;a && c.mixIn(a);c.hasOwnProperty("init") || (c.init = function() {c.$super.init.apply(this, arguments)});c.init.prototype = c;c.$super = this;return c},create: function() {var a = this.extend();a.init.apply(a, arguments);return a},init: function() {},mixIn: function(a) {for (var c in a)a.hasOwnProperty(c) && (this[c] = a[c]);a.hasOwnProperty("toString") && (this.toString = a.toString)},clone: function() {return this.init.prototype.extend(this)}}, r = l.WordArray = t.extend({init: function(a, c) {a = this.words = a || [];this.sigBytes = c != p ? c : 4 * a.length},toString: function(a) {return (a || v).stringify(this)},concat: function(a) {var c = this.words, e = a.words, j = this.sigBytes;a = a.sigBytes;this.clamp();if (j % 4)for (var k = 0; k < a; k++)c[j + k >>> 2] |= (e[k >>> 2] >>> 24 - 8 * (k % 4) & 255) << 24 - 8 * ((j + k) % 4);else if (65535 < e.length)for (k = 0; k < a; k += 4)c[j + k >>> 2] = e[k >>> 2];elsec.push.apply(c, e);this.sigBytes += a;return this},clamp: function() {var a = this.words, c = this.sigBytes;a[c >>> 2] &= 4294967295 << 32 - 8 * (c % 4);a.length = u.ceil(c / 4)},clone: function() {var a = t.clone.call(this);a.words = this.words.slice(0);return a},random: function(a) {for (var c = [], e = 0; e < a; e += 4)c.push(4294967296 * u.random() | 0);return new r.init(c,a)}}), w = d.enc = {}, v = w.Hex = {stringify: function(a) {var c = a.words;a = a.sigBytes;for (var e = [], j = 0; j < a; j++) {var k = c[j >>> 2] >>> 24 - 8 * (j % 4) & 255;e.push((k >>> 4).toString(16));e.push((k & 15).toString(16))}return e.join("")},parse: function(a) {for (var c = a.length, e = [], j = 0; j < c; j += 2)e[j >>> 3] |= parseInt(a.substr(j, 2), 16) << 24 - 4 * (j % 8);return new r.init(e,c / 2)}}, b = w.Latin1 = {stringify: function(a) {var c = a.words;a = a.sigBytes;for (var e = [], j = 0; j < a; j++)e.push(String.fromCharCode(c[j >>> 2] >>> 24 - 8 * (j % 4) & 255));return e.join("")},parse: function(a) {for (var c = a.length, e = [], j = 0; j < c; j++)e[j >>> 2] |= (a.charCodeAt(j) & 255) << 24 - 8 * (j % 4);return new r.init(e,c)}}, x = w.Utf8 = {stringify: function(a) {try {return decodeURIComponent(escape(b.stringify(a)))} catch (c) {throw Error("Malformed UTF-8 data")}},parse: function(a) {return b.parse(unescape(encodeURIComponent(a)))}}, q = l.BufferedBlockAlgorithm = t.extend({reset: function() {this.i0x = new r.init;this.yP8H = 0},zF9w: function(a) {"string" == typeof a && (a = x.parse(a));this.i0x.concat(a);this.yP8H += a.sigBytes},mC4G: function(a) {var c = this.i0x, e = c.words, j = c.sigBytes, k = this.blockSize, b = j / (4 * k), b = a ? u.ceil(b) : u.max((b | 0) - this.Xb8T, 0);a = b * k;j = u.min(4 * a, j);if (a) {for (var q = 0; q < a; q += k)this.tD7w(e, q);q = e.splice(0, a);c.sigBytes -= j}return new r.init(q,j)},clone: function() {var a = t.clone.call(this);a.i0x = this.i0x.clone();return a},Xb8T: 0});l.Hasher = q.extend({cfg: t.extend(),init: function(a) {this.cfg = this.cfg.extend(a);this.reset()},reset: function() {q.reset.call(this);this.mf4j()},update: function(a) {this.zF9w(a);this.mC4G();return this},finalize: function(a) {a && this.zF9w(a);return this.nT5Y()},blockSize: 16,my4C: function(a) {return function(b, e) {return (new a.init(e)).finalize(b)}},yO8G: function(a) {return function(b, e) {return (new n.HMAC.init(a,e)).finalize(b)}}});var n = d.algo = {};return d
}(Math);
(function() {var u = CryptoJS, p = u.lib.WordArray;u.enc.Base64 = {stringify: function(d) {var l = d.words, p = d.sigBytes, t = this.bD0x;d.clamp();d = [];for (var r = 0; r < p; r += 3)for (var w = (l[r >>> 2] >>> 24 - 8 * (r % 4) & 255) << 16 | (l[r + 1 >>> 2] >>> 24 - 8 * ((r + 1) % 4) & 255) << 8 | l[r + 2 >>> 2] >>> 24 - 8 * ((r + 2) % 4) & 255, v = 0; 4 > v && r + .75 * v < p; v++)d.push(t.charAt(w >>> 6 * (3 - v) & 63));if (l = t.charAt(64))for (; d.length % 4; )d.push(l);return d.join("")},parse: function(d) {var l = d.length, s = this.bD0x, t = s.charAt(64);t && (t = d.indexOf(t),-1 != t && (l = t));for (var t = [], r = 0, w = 0; w < l; w++)if (w % 4) {var v = s.indexOf(d.charAt(w - 1)) << 2 * (w % 4), b = s.indexOf(d.charAt(w)) >>> 6 - 2 * (w % 4);t[r >>> 2] |= (v | b) << 24 - 8 * (r % 4);r++}return p.create(t, r)},bD0x: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="}
}
)();
(function(u) {function p(b, n, a, c, e, j, k) {b = b + (n & a | ~n & c) + e + k;return (b << j | b >>> 32 - j) + n}function d(b, n, a, c, e, j, k) {b = b + (n & c | a & ~c) + e + k;return (b << j | b >>> 32 - j) + n}function l(b, n, a, c, e, j, k) {b = b + (n ^ a ^ c) + e + k;return (b << j | b >>> 32 - j) + n}function s(b, n, a, c, e, j, k) {b = b + (a ^ (n | ~c)) + e + k;return (b << j | b >>> 32 - j) + n}for (var t = CryptoJS, r = t.lib, w = r.WordArray, v = r.Hasher, r = t.algo, b = [], x = 0; 64 > x; x++)b[x] = 4294967296 * u.abs(u.sin(x + 1)) | 0;r = r.MD5 = v.extend({mf4j: function() {this.cU1x = new w.init([1732584193, 4023233417, 2562383102, 271733878])},tD7w: function(q, n) {for (var a = 0; 16 > a; a++) {var c = n + a, e = q[c];q[c] = (e << 8 | e >>> 24) & 16711935 | (e << 24 | e >>> 8) & 4278255360}var a = this.cU1x.words, c = q[n + 0], e = q[n + 1], j = q[n + 2], k = q[n + 3], z = q[n + 4], r = q[n + 5], t = q[n + 6], w = q[n + 7], v = q[n + 8], A = q[n + 9], B = q[n + 10], C = q[n + 11], u = q[n + 12], D = q[n + 13], E = q[n + 14], x = q[n + 15], f = a[0], m = a[1], g = a[2], h = a[3], f = p(f, m, g, h, c, 7, b[0]), h = p(h, f, m, g, e, 12, b[1]), g = p(g, h, f, m, j, 17, b[2]), m = p(m, g, h, f, k, 22, b[3]), f = p(f, m, g, h, z, 7, b[4]), h = p(h, f, m, g, r, 12, b[5]), g = p(g, h, f, m, t, 17, b[6]), m = p(m, g, h, f, w, 22, b[7]), f = p(f, m, g, h, v, 7, b[8]), h = p(h, f, m, g, A, 12, b[9]), g = p(g, h, f, m, B, 17, b[10]), m = p(m, g, h, f, C, 22, b[11]), f = p(f, m, g, h, u, 7, b[12]), h = p(h, f, m, g, D, 12, b[13]), g = p(g, h, f, m, E, 17, b[14]), m = p(m, g, h, f, x, 22, b[15]), f = d(f, m, g, h, e, 5, b[16]), h = d(h, f, m, g, t, 9, b[17]), g = d(g, h, f, m, C, 14, b[18]), m = d(m, g, h, f, c, 20, b[19]), f = d(f, m, g, h, r, 5, b[20]), h = d(h, f, m, g, B, 9, b[21]), g = d(g, h, f, m, x, 14, b[22]), m = d(m, g, h, f, z, 20, b[23]), f = d(f, m, g, h, A, 5, b[24]), h = d(h, f, m, g, E, 9, b[25]), g = d(g, h, f, m, k, 14, b[26]), m = d(m, g, h, f, v, 20, b[27]), f = d(f, m, g, h, D, 5, b[28]), h = d(h, f, m, g, j, 9, b[29]), g = d(g, h, f, m, w, 14, b[30]), m = d(m, g, h, f, u, 20, b[31]), f = l(f, m, g, h, r, 4, b[32]), h = l(h, f, m, g, v, 11, b[33]), g = l(g, h, f, m, C, 16, b[34]), m = l(m, g, h, f, E, 23, b[35]), f = l(f, m, g, h, e, 4, b[36]), h = l(h, f, m, g, z, 11, b[37]), g = l(g, h, f, m, w, 16, b[38]), m = l(m, g, h, f, B, 23, b[39]), f = l(f, m, g, h, D, 4, b[40]), h = l(h, f, m, g, c, 11, b[41]), g = l(g, h, f, m, k, 16, b[42]), m = l(m, g, h, f, t, 23, b[43]), f = l(f, m, g, h, A, 4, b[44]), h = l(h, f, m, g, u, 11, b[45]), g = l(g, h, f, m, x, 16, b[46]), m = l(m, g, h, f, j, 23, b[47]), f = s(f, m, g, h, c, 6, b[48]), h = s(h, f, m, g, w, 10, b[49]), g = s(g, h, f, m, E, 15, b[50]), m = s(m, g, h, f, r, 21, b[51]), f = s(f, m, g, h, u, 6, b[52]), h = s(h, f, m, g, k, 10, b[53]), g = s(g, h, f, m, B, 15, b[54]), m = s(m, g, h, f, e, 21, b[55]), f = s(f, m, g, h, v, 6, b[56]), h = s(h, f, m, g, x, 10, b[57]), g = s(g, h, f, m, t, 15, b[58]), m = s(m, g, h, f, D, 21, b[59]), f = s(f, m, g, h, z, 6, b[60]), h = s(h, f, m, g, C, 10, b[61]), g = s(g, h, f, m, j, 15, b[62]), m = s(m, g, h, f, A, 21, b[63]);a[0] = a[0] + f | 0;a[1] = a[1] + m | 0;a[2] = a[2] + g | 0;a[3] = a[3] + h | 0},nT5Y: function() {var b = this.i0x, n = b.words, a = 8 * this.yP8H, c = 8 * b.sigBytes;n[c >>> 5] |= 128 << 24 - c % 32;var e = u.floor(a / 4294967296);n[(c + 64 >>> 9 << 4) + 15] = (e << 8 | e >>> 24) & 16711935 | (e << 24 | e >>> 8) & 4278255360;n[(c + 64 >>> 9 << 4) + 14] = (a << 8 | a >>> 24) & 16711935 | (a << 24 | a >>> 8) & 4278255360;b.sigBytes = 4 * (n.length + 1);this.mC4G();b = this.cU1x;n = b.words;for (a = 0; 4 > a; a++)c = n[a],n[a] = (c << 8 | c >>> 24) & 16711935 | (c << 24 | c >>> 8) & 4278255360;return b},clone: function() {var b = v.clone.call(this);b.cU1x = this.cU1x.clone();return b}});t.MD5 = v.my4C(r);t.HmacMD5 = v.yO8G(r)
}
)(Math);
(function() {var u = CryptoJS, p = u.lib, d = p.Base, l = p.WordArray, p = u.algo, s = p.EvpKDF = d.extend({cfg: d.extend({keySize: 4,hasher: p.MD5,iterations: 1}),init: function(d) {this.cfg = this.cfg.extend(d)},compute: function(d, r) {for (var p = this.cfg, s = p.hasher.create(), b = l.create(), u = b.words, q = p.keySize, p = p.iterations; u.length < q; ) {n && s.update(n);var n = s.update(d).finalize(r);s.reset();for (var a = 1; a < p; a++)n = s.finalize(n),s.reset();b.concat(n)}b.sigBytes = 4 * q;return b}});u.EvpKDF = function(d, l, p) {return s.create(p).compute(d, l)}
}
)();
CryptoJS.lib.Cipher || function(u) {var p = CryptoJS, d = p.lib, l = d.Base, s = d.WordArray, t = d.BufferedBlockAlgorithm, r = p.enc.Base64, w = p.algo.EvpKDF, v = d.Cipher = t.extend({cfg: l.extend(),createEncryptor: function(e, a) {return this.create(this.Hy1x, e, a)},createDecryptor: function(e, a) {return this.create(this.brR5W, e, a)},init: function(e, a, b) {this.cfg = this.cfg.extend(b);this.WZ8R = e;this.J0x = a;this.reset()},reset: function() {t.reset.call(this);this.mf4j()},process: function(e) {this.zF9w(e);return this.mC4G()},finalize: function(e) {e && this.zF9w(e);return this.nT5Y()},keySize: 4,ivSize: 4,Hy1x: 1,brR5W: 2,my4C: function(e) {return {encrypt: function(b, k, d) {return ("string" == typeof k ? c : a).encrypt(e, b, k, d)},decrypt: function(b, k, d) {return ("string" == typeof k ? c : a).decrypt(e, b, k, d)}}}});d.StreamCipher = v.extend({nT5Y: function() {return this.mC4G(!0)},blockSize: 1});var b = p.mode = {}, x = function(e, a, b) {var c = this.tb7U;c ? this.tb7U = u : c = this.CC9t;for (var d = 0; d < b; d++)e[a + d] ^= c[d]}, q = (d.BlockCipherMode = l.extend({createEncryptor: function(e, a) {return this.Encryptor.create(e, a)},createDecryptor: function(e, a) {return this.Decryptor.create(e, a)},init: function(e, a) {this.vc7V = e;this.tb7U = a}})).extend();q.Encryptor = q.extend({processBlock: function(e, a) {var b = this.vc7V, c = b.blockSize;x.call(this, e, a, c);b.encryptBlock(e, a);this.CC9t = e.slice(a, a + c)}});q.Decryptor = q.extend({processBlock: function(e, a) {var b = this.vc7V, c = b.blockSize, d = e.slice(a, a + c);b.decryptBlock(e, a);x.call(this, e, a, c);this.CC9t = d}});b = b.CBC = q;q = (p.pad = {}).Pkcs7 = {pad: function(a, b) {for (var c = 4 * b, c = c - a.sigBytes % c, d = c << 24 | c << 16 | c << 8 | c, l = [], n = 0; n < c; n += 4)l.push(d);c = s.create(l, c);a.concat(c)},unpad: function(a) {a.sigBytes -= a.words[a.sigBytes - 1 >>> 2] & 255}};d.BlockCipher = v.extend({cfg: v.cfg.extend({mode: b,padding: q}),reset: function() {v.reset.call(this);var a = this.cfg, b = a.iv, a = a.mode;if (this.WZ8R == this.Hy1x)var c = a.createEncryptor;elsec = a.createDecryptor,this.Xb8T = 1;this.eT2x = c.call(a, this, b && b.words)},tD7w: function(a, b) {this.eT2x.processBlock(a, b)},nT5Y: function() {var a = this.cfg.padding;if (this.WZ8R == this.Hy1x) {a.pad(this.i0x, this.blockSize);var b = this.mC4G(!0)} elseb = this.mC4G(!0),a.unpad(b);return b},blockSize: 4});var n = d.CipherParams = l.extend({init: function(a) {this.mixIn(a)},toString: function(a) {return (a || this.formatter).stringify(this)}}), b = (p.format = {}).OpenSSL = {stringify: function(a) {var b = a.ciphertext;a = a.salt;return (a ? s.create([1398893684, 1701076831]).concat(a).concat(b) : b).toString(r)},parse: function(a) {a = r.parse(a);var b = a.words;if (1398893684 == b[0] && 1701076831 == b[1]) {var c = s.create(b.slice(2, 4));b.splice(0, 4);a.sigBytes -= 16}return n.create({ciphertext: a,salt: c})}}, a = d.SerializableCipher = l.extend({cfg: l.extend({format: b}),encrypt: function(a, b, c, d) {d = this.cfg.extend(d);var l = a.createEncryptor(c, d);b = l.finalize(b);l = l.cfg;return n.create({ciphertext: b,key: c,iv: l.iv,algorithm: a,mode: l.mode,padding: l.padding,blockSize: a.blockSize,formatter: d.format})},decrypt: function(a, b, c, d) {d = this.cfg.extend(d);b = this.FP0x(b, d.format);return a.createDecryptor(c, d).finalize(b.ciphertext)},FP0x: function(a, b) {return "string" == typeof a ? b.parse(a, this) : a}}), p = (p.kdf = {}).OpenSSL = {execute: function(a, b, c, d) {d || (d = s.random(8));a = w.create({keySize: b + c}).compute(a, d);c = s.create(a.words.slice(b), 4 * c);a.sigBytes = 4 * b;return n.create({key: a,iv: c,salt: d})}}, c = d.PasswordBasedCipher = a.extend({cfg: a.cfg.extend({kdf: p}),encrypt: function(b, c, d, l) {l = this.cfg.extend(l);d = l.kdf.execute(d, b.keySize, b.ivSize);l.iv = d.iv;b = a.encrypt.call(this, b, c, d.key, l);b.mixIn(d);return b},decrypt: function(b, c, d, l) {l = this.cfg.extend(l);c = this.FP0x(c, l.format);d = l.kdf.execute(d, b.keySize, b.ivSize, c.salt);l.iv = d.iv;return a.decrypt.call(this, b, c, d.key, l)}})
}();
(function() {for (var u = CryptoJS, p = u.lib.BlockCipher, d = u.algo, l = [], s = [], t = [], r = [], w = [], v = [], b = [], x = [], q = [], n = [], a = [], c = 0; 256 > c; c++)a[c] = 128 > c ? c << 1 : c << 1 ^ 283;for (var e = 0, j = 0, c = 0; 256 > c; c++) {var k = j ^ j << 1 ^ j << 2 ^ j << 3 ^ j << 4, k = k >>> 8 ^ k & 255 ^ 99;l[e] = k;s[k] = e;var z = a[e], F = a[z], G = a[F], y = 257 * a[k] ^ 16843008 * k;t[e] = y << 24 | y >>> 8;r[e] = y << 16 | y >>> 16;w[e] = y << 8 | y >>> 24;v[e] = y;y = 16843009 * G ^ 65537 * F ^ 257 * z ^ 16843008 * e;b[k] = y << 24 | y >>> 8;x[k] = y << 16 | y >>> 16;q[k] = y << 8 | y >>> 24;n[k] = y;e ? (e = z ^ a[a[a[G ^ z]]],j ^= a[a[j]]) : e = j = 1}var H = [0, 1, 2, 4, 8, 16, 32, 64, 128, 27, 54], d = d.AES = p.extend({mf4j: function() {for (var a = this.J0x, c = a.words, d = a.sigBytes / 4, a = 4 * ((this.ZG9x = d + 6) + 1), e = this.bsu6o = [], j = 0; j < a; j++)if (j < d)e[j] = c[j];else {var k = e[j - 1];j % d ? 6 < d && 4 == j % d && (k = l[k >>> 24] << 24 | l[k >>> 16 & 255] << 16 | l[k >>> 8 & 255] << 8 | l[k & 255]) : (k = k << 8 | k >>> 24,k = l[k >>> 24] << 24 | l[k >>> 16 & 255] << 16 | l[k >>> 8 & 255] << 8 | l[k & 255],k ^= H[j / d | 0] << 24);e[j] = e[j - d] ^ k}c = this.bsv6p = [];for (d = 0; d < a; d++)j = a - d,k = d % 4 ? e[j] : e[j - 4],c[d] = 4 > d || 4 >= j ? k : b[l[k >>> 24]] ^ x[l[k >>> 16 & 255]] ^ q[l[k >>> 8 & 255]] ^ n[l[k & 255]]},encryptBlock: function(a, b) {this.CT0x(a, b, this.bsu6o, t, r, w, v, l)},decryptBlock: function(a, c) {var d = a[c + 1];a[c + 1] = a[c + 3];a[c + 3] = d;this.CT0x(a, c, this.bsv6p, b, x, q, n, s);d = a[c + 1];a[c + 1] = a[c + 3];a[c + 3] = d},CT0x: function(a, b, c, d, e, j, l, f) {for (var m = this.ZG9x, g = a[b] ^ c[0], h = a[b + 1] ^ c[1], k = a[b + 2] ^ c[2], n = a[b + 3] ^ c[3], p = 4, r = 1; r < m; r++)var q = d[g >>> 24] ^ e[h >>> 16 & 255] ^ j[k >>> 8 & 255] ^ l[n & 255] ^ c[p++], s = d[h >>> 24] ^ e[k >>> 16 & 255] ^ j[n >>> 8 & 255] ^ l[g & 255] ^ c[p++], t = d[k >>> 24] ^ e[n >>> 16 & 255] ^ j[g >>> 8 & 255] ^ l[h & 255] ^ c[p++], n = d[n >>> 24] ^ e[g >>> 16 & 255] ^ j[h >>> 8 & 255] ^ l[k & 255] ^ c[p++], g = q, h = s, k = t;q = (f[g >>> 24] << 24 | f[h >>> 16 & 255] << 16 | f[k >>> 8 & 255] << 8 | f[n & 255]) ^ c[p++];s = (f[h >>> 24] << 24 | f[k >>> 16 & 255] << 16 | f[n >>> 8 & 255] << 8 | f[g & 255]) ^ c[p++];t = (f[k >>> 24] << 24 | f[n >>> 16 & 255] << 16 | f[g >>> 8 & 255] << 8 | f[h & 255]) ^ c[p++];n = (f[n >>> 24] << 24 | f[g >>> 16 & 255] << 16 | f[h >>> 8 & 255] << 8 | f[k & 255]) ^ c[p++];a[b] = q;a[b + 1] = s;a[b + 2] = t;a[b + 3] = n},keySize: 8});u.AES = p.my4C(d)
}
)();
function RSAKeyPair(a, b, c) {this.e = biFromHex(a),this.d = biFromHex(b),this.m = biFromHex(c),this.chunkSize = 2 * biHighIndex(this.m),this.radix = 16,this.barrett = new BarrettMu(this.m)
}
function twoDigit(a) {return (10 > a ? "0" : "") + String(a)
}
function encryptedString(a, b) {for (var f, g, h, i, j, k, l, c = new Array, d = b.length, e = 0; d > e; )c[e] = b.charCodeAt(e),e++;for (; 0 != c.length % a.chunkSize; )c[e++] = 0;for (f = c.length,g = "",e = 0; f > e; e += a.chunkSize) {for (j = new BigInt,h = 0,i = e; i < e + a.chunkSize; ++h)j.digits[h] = c[i++],j.digits[h] += c[i++] << 8;k = a.barrett.powMod(j, a.e),l = 16 == a.radix ? biToHex(k) : biToString(k, a.radix),g += l + " "}return g.substring(0, g.length - 1)
}
function decryptedString(a, b) {var e, f, g, h, c = b.split(" "), d = "";for (e = 0; e < c.length; ++e)for (h = 16 == a.radix ? biFromHex(c[e]) : biFromString(c[e], a.radix),g = a.barrett.powMod(h, a.d),f = 0; f <= biHighIndex(g); ++f)d += String.fromCharCode(255 & g.digits[f], g.digits[f] >> 8);return 0 == d.charCodeAt(d.length - 1) && (d = d.substring(0, d.length - 1)),d
}
function setMaxDigits(a) {maxDigits = a,ZERO_ARRAY = new Array(maxDigits);for (var b = 0; b < ZERO_ARRAY.length; b++)ZERO_ARRAY[b] = 0;bigZero = new BigInt,bigOne = new BigInt,bigOne.digits[0] = 1
}
function BigInt(a) {this.digits = "boolean" == typeof a && 1 == a ? null : ZERO_ARRAY.slice(0),this.isNeg = !1
}
function biFromDecimal(a) {for (var d, e, f, b = "-" == a.charAt(0), c = b ? 1 : 0; c < a.length && "0" == a.charAt(c); )++c;if (c == a.length)d = new BigInt;else {for (e = a.length - c,f = e % dpl10,0 == f && (f = dpl10),d = biFromNumber(Number(a.substr(c, f))),c += f; c < a.length; )d = biAdd(biMultiply(d, lr10), biFromNumber(Number(a.substr(c, dpl10)))),c += dpl10;d.isNeg = b}return d
}
function biCopy(a) {var b = new BigInt(!0);return b.digits = a.digits.slice(0),b.isNeg = a.isNeg,b
}
function biFromNumber(a) {var c, b = new BigInt;for (b.isNeg = 0 > a,a = Math.abs(a),c = 0; a > 0; )b.digits[c++] = a & maxDigitVal,a >>= biRadixBits;return b
}
function reverseStr(a) {var c, b = "";for (c = a.length - 1; c > -1; --c)b += a.charAt(c);return b
}
function biToString(a, b) {var d, e, c = new BigInt;for (c.digits[0] = b,d = biDivideModulo(a, c),e = hexatrigesimalToChar[d[1].digits[0]]; 1 == biCompare(d[0], bigZero); )d = biDivideModulo(d[0], c),digit = d[1].digits[0],e += hexatrigesimalToChar[d[1].digits[0]];return (a.isNeg ? "-" : "") + reverseStr(e)
}
function biToDecimal(a) {var c, d, b = new BigInt;for (b.digits[0] = 10,c = biDivideModulo(a, b),d = String(c[1].digits[0]); 1 == biCompare(c[0], bigZero); )c = biDivideModulo(c[0], b),d += String(c[1].digits[0]);return (a.isNeg ? "-" : "") + reverseStr(d)
}
function digitToHex(a) {var b = 15, c = "";for (i = 0; 4 > i; ++i)c += hexToChar[a & b],a >>>= 4;return reverseStr(c)
}
function biToHex(a) {var d, b = "";for (biHighIndex(a),d = biHighIndex(a); d > -1; --d)b += digitToHex(a.digits[d]);return b
}
function charToHex(a) {var h, b = 48, c = b + 9, d = 97, e = d + 25, f = 65, g = 90;return h = a >= b && c >= a ? a - b : a >= f && g >= a ? 10 + a - f : a >= d && e >= a ? 10 + a - d : 0
}
function hexToDigit(a) {var d, b = 0, c = Math.min(a.length, 4);for (d = 0; c > d; ++d)b <<= 4,b |= charToHex(a.charCodeAt(d));return b
}
function biFromHex(a) {var d, e, b = new BigInt, c = a.length;for (d = c,e = 0; d > 0; d -= 4,++e)b.digits[e] = hexToDigit(a.substr(Math.max(d - 4, 0), Math.min(d, 4)));return b
}
function biFromString(a, b) {var g, h, i, j, c = "-" == a.charAt(0), d = c ? 1 : 0, e = new BigInt, f = new BigInt;for (f.digits[0] = 1,g = a.length - 1; g >= d; g--)h = a.charCodeAt(g),i = charToHex(h),j = biMultiplyDigit(f, i),e = biAdd(e, j),f = biMultiplyDigit(f, b);return e.isNeg = c,e
}
function biDump(a) {return (a.isNeg ? "-" : "") + a.digits.join(" ")
}
function biAdd(a, b) {var c, d, e, f;if (a.isNeg != b.isNeg)b.isNeg = !b.isNeg,c = biSubtract(a, b),b.isNeg = !b.isNeg;else {for (c = new BigInt,d = 0,f = 0; f < a.digits.length; ++f)e = a.digits[f] + b.digits[f] + d,c.digits[f] = 65535 & e,d = Number(e >= biRadix);c.isNeg = a.isNeg}return c
}
function biSubtract(a, b) {var c, d, e, f;if (a.isNeg != b.isNeg)b.isNeg = !b.isNeg,c = biAdd(a, b),b.isNeg = !b.isNeg;else {for (c = new BigInt,e = 0,f = 0; f < a.digits.length; ++f)d = a.digits[f] - b.digits[f] + e,c.digits[f] = 65535 & d,c.digits[f] < 0 && (c.digits[f] += biRadix),e = 0 - Number(0 > d);if (-1 == e) {for (e = 0,f = 0; f < a.digits.length; ++f)d = 0 - c.digits[f] + e,c.digits[f] = 65535 & d,c.digits[f] < 0 && (c.digits[f] += biRadix),e = 0 - Number(0 > d);c.isNeg = !a.isNeg} elsec.isNeg = a.isNeg}return c
}
function biHighIndex(a) {for (var b = a.digits.length - 1; b > 0 && 0 == a.digits[b]; )--b;return b
}
function biNumBits(a) {var e, b = biHighIndex(a), c = a.digits[b], d = (b + 1) * bitsPerDigit;for (e = d; e > d - bitsPerDigit && 0 == (32768 & c); --e)c <<= 1;return e
}
function biMultiply(a, b) {var d, h, i, k, c = new BigInt, e = biHighIndex(a), f = biHighIndex(b);for (k = 0; f >= k; ++k) {for (d = 0,i = k,j = 0; e >= j; ++j,++i)h = c.digits[i] + a.digits[j] * b.digits[k] + d,c.digits[i] = h & maxDigitVal,d = h >>> biRadixBits;c.digits[k + e + 1] = d}return c.isNeg = a.isNeg != b.isNeg,c
}
function biMultiplyDigit(a, b) {var c, d, e, f;for (result = new BigInt,c = biHighIndex(a),d = 0,f = 0; c >= f; ++f)e = result.digits[f] + a.digits[f] * b + d,result.digits[f] = e & maxDigitVal,d = e >>> biRadixBits;return result.digits[1 + c] = d,result
}
function arrayCopy(a, b, c, d, e) {var g, h, f = Math.min(b + e, a.length);for (g = b,h = d; f > g; ++g,++h)c[h] = a[g]
}
function biShiftLeft(a, b) {var e, f, g, h, c = Math.floor(b / bitsPerDigit), d = new BigInt;for (arrayCopy(a.digits, 0, d.digits, c, d.digits.length - c),e = b % bitsPerDigit,f = bitsPerDigit - e,g = d.digits.length - 1,h = g - 1; g > 0; --g,--h)d.digits[g] = d.digits[g] << e & maxDigitVal | (d.digits[h] & highBitMasks[e]) >>> f;return d.digits[0] = d.digits[g] << e & maxDigitVal,d.isNeg = a.isNeg,d
}
function biShiftRight(a, b) {var e, f, g, h, c = Math.floor(b / bitsPerDigit), d = new BigInt;for (arrayCopy(a.digits, c, d.digits, 0, a.digits.length - c),e = b % bitsPerDigit,f = bitsPerDigit - e,g = 0,h = g + 1; g < d.digits.length - 1; ++g,++h)d.digits[g] = d.digits[g] >>> e | (d.digits[h] & lowBitMasks[e]) << f;return d.digits[d.digits.length - 1] >>>= e,d.isNeg = a.isNeg,d
}
function biMultiplyByRadixPower(a, b) {var c = new BigInt;return arrayCopy(a.digits, 0, c.digits, b, c.digits.length - b),c
}
function biDivideByRadixPower(a, b) {var c = new BigInt;return arrayCopy(a.digits, b, c.digits, 0, c.digits.length - b),c
}
function biModuloByRadixPower(a, b) {var c = new BigInt;return arrayCopy(a.digits, 0, c.digits, 0, b),c
}
function biCompare(a, b) {if (a.isNeg != b.isNeg)return 1 - 2 * Number(a.isNeg);for (var c = a.digits.length - 1; c >= 0; --c)if (a.digits[c] != b.digits[c])return a.isNeg ? 1 - 2 * Number(a.digits[c] > b.digits[c]) : 1 - 2 * Number(a.digits[c] < b.digits[c]);return 0
}
function biDivideModulo(a, b) {var f, g, h, i, j, k, l, m, n, o, p, q, r, s, c = biNumBits(a), d = biNumBits(b), e = b.isNeg;if (d > c)return a.isNeg ? (f = biCopy(bigOne),f.isNeg = !b.isNeg,a.isNeg = !1,b.isNeg = !1,g = biSubtract(b, a),a.isNeg = !0,b.isNeg = e) : (f = new BigInt,g = biCopy(a)),new Array(f,g);for (f = new BigInt,g = a,h = Math.ceil(d / bitsPerDigit) - 1,i = 0; b.digits[h] < biHalfRadix; )b = biShiftLeft(b, 1),++i,++d,h = Math.ceil(d / bitsPerDigit) - 1;for (g = biShiftLeft(g, i),c += i,j = Math.ceil(c / bitsPerDigit) - 1,k = biMultiplyByRadixPower(b, j - h); -1 != biCompare(g, k); )++f.digits[j - h],g = biSubtract(g, k);for (l = j; l > h; --l) {for (m = l >= g.digits.length ? 0 : g.digits[l],n = l - 1 >= g.digits.length ? 0 : g.digits[l - 1],o = l - 2 >= g.digits.length ? 0 : g.digits[l - 2],p = h >= b.digits.length ? 0 : b.digits[h],q = h - 1 >= b.digits.length ? 0 : b.digits[h - 1],f.digits[l - h - 1] = m == p ? maxDigitVal : Math.floor((m * biRadix + n) / p),r = f.digits[l - h - 1] * (p * biRadix + q),s = m * biRadixSquared + (n * biRadix + o); r > s; )--f.digits[l - h - 1],r = f.digits[l - h - 1] * (p * biRadix | q),s = m * biRadix * biRadix + (n * biRadix + o);k = biMultiplyByRadixPower(b, l - h - 1),g = biSubtract(g, biMultiplyDigit(k, f.digits[l - h - 1])),g.isNeg && (g = biAdd(g, k),--f.digits[l - h - 1])}return g = biShiftRight(g, i),f.isNeg = a.isNeg != e,a.isNeg && (f = e ? biAdd(f, bigOne) : biSubtract(f, bigOne),b = biShiftRight(b, i),g = biSubtract(b, g)),0 == g.digits[0] && 0 == biHighIndex(g) && (g.isNeg = !1),new Array(f,g)
}
function biDivide(a, b) {return biDivideModulo(a, b)[0]
}
function biModulo(a, b) {return biDivideModulo(a, b)[1]
}
function biMultiplyMod(a, b, c) {return biModulo(biMultiply(a, b), c)
}
function biPow(a, b) {for (var c = bigOne, d = a; ; ) {if (0 != (1 & b) && (c = biMultiply(c, d)),b >>= 1,0 == b)break;d = biMultiply(d, d)}return c
}
function biPowMod(a, b, c) {for (var d = bigOne, e = a, f = b; ; ) {if (0 != (1 & f.digits[0]) && (d = biMultiplyMod(d, e, c)),f = biShiftRight(f, 1),0 == f.digits[0] && 0 == biHighIndex(f))break;e = biMultiplyMod(e, e, c)}return d
}
function BarrettMu(a) {this.modulus = biCopy(a),this.k = biHighIndex(this.modulus) + 1;var b = new BigInt;b.digits[2 * this.k] = 1,this.mu = biDivide(b, this.modulus),this.bkplus1 = new BigInt,this.bkplus1.digits[this.k + 1] = 1,this.modulo = BarrettMu_modulo,this.multiplyMod = BarrettMu_multiplyMod,this.powMod = BarrettMu_powMod
}
function BarrettMu_modulo(a) {var i, b = biDivideByRadixPower(a, this.k - 1), c = biMultiply(b, this.mu), d = biDivideByRadixPower(c, this.k + 1), e = biModuloByRadixPower(a, this.k + 1), f = biMultiply(d, this.modulus), g = biModuloByRadixPower(f, this.k + 1), h = biSubtract(e, g);for (h.isNeg && (h = biAdd(h, this.bkplus1)),i = biCompare(h, this.modulus) >= 0; i; )h = biSubtract(h, this.modulus),i = biCompare(h, this.modulus) >= 0;return h
}
function BarrettMu_multiplyMod(a, b) {var c = biMultiply(a, b);return this.modulo(c)
}
function BarrettMu_powMod(a, b) {var d, e, c = new BigInt;for (c.digits[0] = 1,d = a,e = b; ; ) {if (0 != (1 & e.digits[0]) && (c = this.multiplyMod(c, d)),e = biShiftRight(e, 1),0 == e.digits[0] && 0 == biHighIndex(e))break;d = this.multiplyMod(d, d)}return c
}
var maxDigits, ZERO_ARRAY, bigZero, bigOne, dpl10, lr10, hexatrigesimalToChar, hexToChar, highBitMasks, lowBitMasks, biRadixBase = 2, biRadixBits = 16, bitsPerDigit = biRadixBits, biRadix = 65536, biHalfRadix = biRadix >>> 1, biRadixSquared = biRadix * biRadix, maxDigitVal = biRadix - 1, maxInteger = 9999999999999998;
setMaxDigits(20),
dpl10 = 15,
lr10 = biFromNumber(1e15),
hexatrigesimalToChar = new Array("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"),
hexToChar = new Array("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"),
highBitMasks = new Array(0,32768,49152,57344,61440,63488,64512,65024,65280,65408,65472,65504,65520,65528,65532,65534,65535),
lowBitMasks = new Array(0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535);!function() {function a(a) {var d, e, b = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", c = "";for (d = 0; a > d; d += 1)e = Math.random() * b.length,e = Math.floor(e),c += b.charAt(e);return c}function b(a, b) {var c = 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});return f.toString()}function c(a, b, c) {var d, e;return setMaxDigits(131),d = new RSAKeyPair(b,"",c),e = encryptedString(d, a)}function d(d, e, f, g) {var h = {}, i = a(16);return h.encText = b(d, g),h.encText = b(h.encText, i),h.encSecKey = c(i, e, f),h}function e(a, b, d, e) {var f = {};return f.encText = c(a + e, b, d),f}window.asrsea = d,window.ecnonasr = e
}();
D = '{"ids":"[1859245776]","level":"standard","encodeType":"aac","csrf_token":""}',
E  = '010001',
F =  '00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7',
G = '0CoJUm6Qyw8W8jud';function get_data(){var result = window.asrsea(D,E,F,G);return result;
}

导入execjs模块，没有就终端运行pip install pyexecjs安装

import execjsdef get_data():node = execjs.get()with open('wyymusic.js',encoding='utf-8')as f:js_code = f.read()ctx = node.compile(js_code)result = ctx.call('get_data')data = {'params': result['encText'],'encSecKey': result['encSecKey'],}return datadef main():data = get_data()print(data)if __name__ == '__main__':main()

运行，成功获取加密参数

{'params': '8rehHe1mLdGojEkrS0SDgcRJxg38yNKj3mqeX4DksILmjpILp4CDmVxqu0gh5fkK/Z4dhvPr7in5jy62cU/Tv0WrnlP6PIeJWW0R5yVhxAYR22XWL5uBf+VvWcmelpYYiGiP1ZsPGmgEc5Jmvas7iw==', 'encSecKey': '7402c4eae508ad6f7621f27fc82295e5064bf3afcc1a4751ebc64bcf78f2647b7c3e7094e96beb0a7c54c024e5aad6d01425b5f7f1e55bcff8990535134b6e782012a0ac2ee420f3f59e89ce69bedf4e1cb894ecb9992f5607b1321785ae7741d0af5100b9925dc7bf6238e411c4bb51d3dfe2e495f598ac25aac304f96eb2d4'}

5、请求页面，获取直链

添加代码段

import requestsdef get_straight_link(data):url = 'https://music.163.com/weapi/song/enhance/player/url/v1?csrf_token='headers = {'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/''537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36'}resp = requests.post(url=url, headers=headers, data=data).json()return resp['data'][0]['url']

最终代码如下


import requests
import execjsdef get_data():node = execjs.get()with open('wyymusic.js',encoding='utf-8')as f:js_code = f.read()ctx = node.compile(js_code)result = ctx.call('get_data')data = {'params': result['encText'],'encSecKey': result['encSecKey'],}return datadef get_straight_link(data):url = 'https://music.163.com/weapi/song/enhance/player/url/v1?csrf_token='headers = {'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/''537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36'}resp = requests.post(url=url, headers=headers, data=data).json()return resp['data'][0]['url']def main():data = get_data()link = get_straight_link(data)print(link)if __name__ == '__main__':main()

运行结果得到该音乐的链接。

6、补充

可以在JS代码中的自定义函数传入第一个参数的值，在python中进行传参调用，就可以实现不同歌曲ID的直链获取。此外，还可以写一个输入歌曲名就可以返回ID的python程序，两者一结合，就可以实现对音乐快速获取，这里，就不再赘述了，留待读者进一步完善。

如有不正确之处，望指正。