163-music/index.js

Netease Music SDK in Node.js

const URI = require('url');
const http = require('http');
const pack = require('./pack');
const crypto = require('crypto');
const EventEmitter = require('events');
const querystring = require('querystring');

class NeteaseMusic extends EventEmitter {
  constructor(options) {
    super();
    Object.assign(this, {
      api: 'http://music.163.com/',
      secret: '7246674226682325323F5E6544673A51',
      cookie: 'os=pc; osver=Microsoft-Windows-10-Professional-build-10586-64bit; appver=2.0.3.131777; channel=netease; __remember_me=true',
      userAgent: 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1'
    }, options);
  }
  encrypt(body) {
    const { secret } = this;
    const password = pack('H*', secret)
    const cipher = crypto.createCipheriv('aes-128-ecb', password, '')
    body = JSON.stringify(body);
    body = cipher.update(body, 'utf8', 'base64') + cipher.final('base64')
    const hex = Buffer.from(body, 'base64').toString('hex')
    return hex.toUpperCase();
  }
  request(path, params) {
    const {
      method,
      body,
      headers = {}
    } = params;
    headers['Content-Type'] = 'application/x-www-form-urlencoded';
    headers['Content-Length'] = Buffer.byteLength(body);
    const { hostname } = URI.parse(this.api);
    return new Promise((resolve, reject) => {
      const req = http.request({
        hostname,
        path,
        method,
        headers
      }, (res, buffer = []) => {
        res
          .on('error', reject)
          .on('data', chunk => buffer.push(chunk))
          .on('end', () => {
            res.data = Buffer.concat(buffer)
            res.text = () => Promise.resolve(res.data.toString());
            res.json = () => res.text().then(JSON.parse);
            resolve(res);
          });
      });
      req.write(body);
      req.end();
    });
  }
  invoke(method, path, params) {
    const { userAgent, cookie, api } = this;
    return this.request('/api/linux/forward', {
        method: 'POST',
        headers: {
          cookie,
          referer: api,
          'user-agent': userAgent,
        },
        body: querystring.stringify({
          eparams: this.encrypt({
            method,
            params,
            url: api + path,
          })
        })
      })
      .then(res => res.json())
      .then(res => {
        if (res.code === 200) return res;
        const err = new Error(res.msg);
        err.code = res.code;
        err.data = res;
        throw err;
      })
  }
  search(keyword, offset = 0, limit = 3) {
    return this.invoke('POST', '/api/cloudsearch/pc', {
      s: keyword,
      type: 1,
      limit,
      offset,
      total: true,
    });
  }
  artist(id, limit = 50) {
    return this.invoke('GET', `/api/v1/artist/${id}`, {
      id,
      ext: true,
      top: limit
    });
  }
  playlist(id) {
    return this.invoke('POST', '/api/v3/playlist/detail', {
      id
    });
  }
  album(id) {
    return this.invoke('GET', `/api/v1/album/${id}`, {
      id
    });
  }
  song(id) {
    return this.invoke('POST', '/api/v3/song/detail', {
      c: `[{id: ${id}}]`
    });
  }
  url(id, br = 320) {
    return this.invoke('POST', '/api/song/enhance/player/url', {
      ids: [id],
      br: br * 1000
    });
  }
  lyric(id) {
    return this.invoke('POST', '/api/song/lyric', {
      id,
      os: 'linux',
      lv: -1,
      kv: -1,
      tv: -1,
    });
  }
  picture(id, size = 300) {
    const md5 = data => {
      const buf = Buffer.from(data)
      const str = buf.toString('binary')
      return crypto.createHash("md5").update(str).digest('hex')
    }
    const pickey = id => {
      const magic = '3go8&$8*3*3h0k(2)2'.split('')
      const song_id = id.split('').map((item, index) => {
        return String.fromCharCode(item.charCodeAt() ^ (magic[index % magic.length]).charCodeAt())
      })
      const md5Code = md5(song_id.join(''))
      const base64Code = Buffer.from(md5Code, 'hex').toString('base64')
      return base64Code.replace(/\//g, '_').replace(/\+/g, '-')
    }
    return Promise.resolve({
      code: 200,
      url: `https://p3.music.126.net/${pickey(id)}/${id}.jpg?param=${size}y${size}`
    });
  }
}

module.exports = NeteaseMusic;