Unlock netease music

unlock.js

const http = require('http');
const net = require('net');
const url = require('url');

const IP = '211.161.244.70';

const hosts = {
  'p[1-4].music.126.net': 'cloudedge.chinanetcenter.com',
  'm10.music.126.net': 'ws.acgvideo.com',
};

const regex = /^Host:.+$/im;

const seperator = String.fromCharCode(0x3A) + String.fromCharCode(0x20);
const linebreak = String.fromCharCode(0x0D) + String.fromCharCode(0x0A);

function mapHost(source) {
  const match = Object.keys(hosts).find((rule) => {
    const re = new RegExp(rule);

    return re.test(source);
  });

  return match ? hosts[match] : source;
}

function request(req, res) {
  const u = url.parse(req.url);

  const options = {
    hostname: mapHost(u.hostname),
    port: u.port || 80,
    path: u.path,
    method: req.method,
    headers: Object.assign({}, req.headers, {
      'X-Real-IP': IP,
    }),
  };

  const proxyReq = http.request(options, (proxyRes) => {
    res.writeHead(proxyRes.statusCode, proxyRes.headers);
    proxyRes.pipe(res);
  }).on('error', (e) => {
    res.end();
  });

  req.pipe(proxyReq);
}

function connect(req, socket, head) {
  const u = url.parse(`http://${req.url}`);

  const proxySocket = net.connect(u.port, mapHost(u.hostname), () => {
    socket.write(`HTTP/${req.httpVersion} 200 Connection Established\r\n\r\n`);

    proxySocket.pipe(socket);
  }).on('error', (e) => {
    socket.end();
  });

  if (u.port !== '80') {
    return socket.pipe(proxySocket);
  }

  socket.on('data', (data) => {
    const t = data.toString();

    if (regex.test(t)) {
      data = t.replace(regex, `$&${linebreak}X-Real-IP${seperator}${IP}`);
    }

    proxySocket.write(data);
  }).on('end', () => {
    proxySocket.end();
  });
}

http.createServer()
  .on('request', request)
  .on('connect', connect)
  .listen(26569, '0.0.0.0');