目标

首先我们只分析网易云音乐免费歌曲的音频下载，收费我们不处理。

目标就是从浏览器的网易云音乐中，下载免费的歌曲音频文件。

这里涉及到的知识点：

• 浏览器的控制台的使用，以及断点的灵活使用。
• 请求的分析，通过不断地调整断点位置，对调用栈逐步分析，找到js加密部分代码。
• 将加密部分js代码扣到本地，并且能正常运行，也就是在本地执行抠出来的代码，达到的效果和网页中一样。
• 通过Python脚本来实现具体的下载逻辑。

分析

1. 以歌曲曾经的你（现场版）为例，打开对应的连接 https://music.163.com/#/song?id=1960404075

2. 我们可以拿到上面那个音频URL，在浏览器打开个新标签页进行测试，能播放，说明我们找的思路没有问题。

3. 分析这个请求的URL和请求方式，以及是否携带参数。

4. 上一步知道了是post请求，接下来，我们要分析是否携带参数，并且注意请求的参数是否加密

5. 点击Initiator栏，观察这次请求的调用栈，在调用栈中，我们能查到这个请求的流程，加密也肯定在这个请求的某个环节中。

6. 点击调用栈的第一个链接，找打源文件的位置，格式化下js代码，然后打断点，断点打上之后，重新点击播放按钮，让请求卡在断点位置，我们再分析调用栈，慢慢找，不断往前找，直到找到加密的代码。其实到这一步往后，就没法一步一步截图了，只能截个图说个大概，细节没法一张一张截图来凑。

7. 不断的通过更改断点的位置，不断地在调用栈中找加密部分的逻辑代码。

8. 定位到了加密入口位置，注意，截图中的函数名变量名，不会永远不变，所以分析起来要仔细分析了。

上面的Window.asrsea需要的参数，经过调试确定为：

window.asrsea(JSON.stringify(i5n), bsi3x(["流泪", "强"]), bsi3x(Vx8p.md), bsi3x(["爱心", "女孩", "惊恐", "大笑"]));
window.asrsea(arg1, arg2, arg3, arg4);
arg1:JSON.stringify(i5n) --> "{"ids":"[1960404075]","level":"standard","encodeType":"aac","csrf_token":""}"
arg2: bsi3x(["流泪", "强"]) --> '010001'
arg3: bsi3x(Vx8p.md) --> '00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7'
arg4: bsi3x(["爱心", "女孩", "惊恐", "大笑"])  -->  '0CoJUm6Qyw8W8jud'

9. 展开window.asrsea函数的内部细节，就是具体的加密内容了。

接下来，要做的事情就是将js加密这一过程在在Python中实现。

代码实现

思路是我们可以扣代码，也就是将js加密部分代码手动复制粘贴到本地的js文件中，然后通过execjs执行这个js文件，得到加密参数值。当然了，加密需要的参数我们也要分析并准备好。

然后才能具体实现。

开始吧，首先安装依赖，js加密部分也需要提前安装一个模块，Python也是，如果下面两个模块你都安装了，就可以忽略，直接进入编码环节。

js

npm install crypto-js

python

pip install pyexecjs

上代码，首先是js文件网易.js：

let CryptoJS = require("crypto-js")

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
        } else
            c.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 c(a, b, c) {
    var d, e;
    return setMaxDigits(131),
        d = new RSAKeyPair(b, "", c),
        e = encryptedString(d, a)
}

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 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
}

// 加密入口文件，上面那些导包和函数引入，都是d这个函数内部调用所用到的
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
}

// 手动实现一个入口函数，方便Python代码中调用
// 在内部处理真正加密的函数所需要的参数
function main(arg1) {
    // 注意，一定要序列化，否则参数类型不是字符串，仍然不行
    let obj = JSON.stringify({
        csrf_token: "",
        encodeType: "aac",
        ids: `[${arg1}]`,
        level: "standard"
    })
    // 后面三个参数就是固定的了
    // window.asrsea(JSON.stringify(i5n), bsi3x(["流泪", "强"]), bsi3x(Vx8p.md), bsi3x(["爱心", "女孩", "惊恐", "大笑"]));
    var arg2 = '010001'
    var arg3 = '00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7'
    var arg4 = '0CoJUm6Qyw8W8jud'
    return d(obj, arg2, arg3, arg4)
}

// let obj = {
//     csrf_token: "",
//     encodeType: "aac",
//     ids: "[1325905146]",
//     level: "standard"
// }
// console.log(main(JSON.stringify(obj)))

再然后就是Python脚本文件main.py：

# -*- coding = utf-8 -*-
import subprocess
from functools import partial

subprocess.Popen = partial(subprocess.Popen, encoding='utf-8')

import requests
import execjs

headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36"}
def get_audio_url(id):
    # 通过execjs执行js，调用js的加密得到加密后的参数，然后根据参数发送post请求，获取真正音频的url
    f = open('./网易.js', 'r', encoding='utf8')
    data = f.read()
    f.close()
    exe_obj = execjs.compile(data)
    # 通过分析网站的js部分，然后改造了js文件中的main函数，这里调用时，只需要传递歌曲的id值就行了
    song_id = id
    res = exe_obj.call('main', song_id)
    # print(res)
    url = "https://music.163.com/weapi/song/enhance/player/url/v1?csrf_token="
    response = requests.post(
        url=url,
        data={
            "params": res['encText'],
            "encSecKey": res['encSecKey']
        },
        headers=headers,
        stream=True
    )
    # print(response.json())
    """
    {
    'data': 
        [
            {
                'id': 1325905146,
                'url': 'http://m701.music.126.net/20230524190726/948ae456740c76d84d149dd33363d836/jdyyaac/540b/5209/0608/ca1819e42fecd66d957e1bd113bac104.m4a',
                'br': 96000, 'size': 2618825, 'md5': 'ca1819e42fecd66d957e1bd113bac104', 'code': 200, 'expi': 1200,
                'type': 'm4a', 'gain': 0.0, 'peak': 0.979, 'fee': 8, 'uf': None, 'payed': 0, 'flag': 4,
                'canExtend': False, 'freeTrialInfo': None, 'level': 'standard', 'encodeType': 'aac',
                'freeTrialPrivilege': {'resConsumable': False, 'userConsumable': False, 'listenType': None,
                                     'cannotListenReason': None},
                'freeTimeTrialPrivilege': {'resConsumable': False, 'userConsumable': False, 'type': 0,
                                         'remainTime': 0}, 'urlSource': 0, 'rightSource': 0, 'podcastCtrp': None,
                'effectTypes': None, 'time': 214984
            }
        ], 
        'code': 200
    }
    """
    # print(response.json()['data'][0]['url'])
    # 返回url用于后续下载音频内容，返回id就是歌曲的id，用于保存到本地作为文件名
    return response.json()['data'][0]['url'], response.json()['data'][0]['id']

def get_audio_content(id):
    audio_url, audio_id= get_audio_url(id)
    res = requests.get(url=audio_url, headers=headers, stream=True)
    print(res.headers)
    with open(f'{audio_id}.m4a', 'wb') as f:
        for chunk in res.iter_content(1024):
            f.write(chunk)
if __name__ == '__main__':
    # 歌曲胡广生：https://music.163.com/#/song?id=1325905146
    # 歌曲曾经的你（现场版）：https://music.163.com/#/song?id=1960404075
    get_audio_content(1960404075)
    # 代码截止 2023/5/24 号运行无误

24200336889](assets/image-20230524200336889.png)