connect event (http.ClientRequest)

Event: 'connect'

function (response, socket, head) { }

Emitted each time a server responds to a request with a CONNECT method. If this event isn't being listened for, clients receiving a CONNECT method will have their connections closed.

A client server pair that show you how to listen for the 'connect' event.

const http = require('http');
const net = require('net');
const url = require('url');
 
// Create an HTTP tunneling proxy
var proxy = http.createServer( (req, res) => {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('okay');
});
proxy.on('connect', (req, cltSocket, head) => {
  // connect to an origin server
  var srvUrl = url.parse(`http://${req.url}`);
  var srvSocket = net.connect(srvUrl.port, srvUrl.hostname, () => {
    cltSocket.write('HTTP/1.1 200 Connection Established\r\n' +
                    'Proxy-agent: Node.js-Proxy\r\n' +
                    '\r\n');
    srvSocket.write(head);
    srvSocket.pipe(cltSocket);
    cltSocket.pipe(srvSocket);
  });
});
 
// now that proxy is running
proxy.listen(1337, '127.0.0.1', () => {
 
  // make a request to a tunneling proxy
  var options = {
    port: 1337,
    hostname: '127.0.0.1',
    method: 'CONNECT',
    path: 'www.google.com:80'
  };
 
  var req = http.request(options);
  req.end();
 
  req.on('connect', (res, socket, head) => {
    console.log('got connected!');
 
    // make a request over an HTTP tunnel
    socket.write('GET / HTTP/1.1\r\n' +
                 'Host: www.google.com:80\r\n' +
                 'Connection: close\r\n' +
                 '\r\n');
    socket.on('data', (chunk) => {
      console.log(chunk.toString());
    });
    socket.on('end', () => {
      proxy.close();
    });
  });
});

Links:

https://nodejs.org/dist/latest-v5.x/docs/api/http.html#http_event_connect

doc_Nodejs

2025-01-10 15:47:30

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