SocketPair

A pair of coupled Unix sockets (or Windows pipes).

Similar to stream-pair, but with sockets with real fds and .setTimeout(). Originally a workaround for https://github.com/nodejs/node/issues/12716, but still has some use relevant cases, particularly when building proxies.

Note: This workaround is necessary in node v6.11.1, but not necessary in node v8.2.1. I would assume it is also not necessary in later versions.

Usage

var socketPair = require('socket-pair');
 
var socket = socketPair.create(function (err, other) {
  // socket as in `client = new net.Socket(); client.connect(...);`
  // other as in `server.on('connection', function (conn) { ... })`
 
  socket.write('123');
  other.on('data', function (chunk) {
    console.log(chunk.toString('utf8'));
  });
 
  socketPair.closeAll();
});

I named them client and connection, but their names really have no meaning.

You can call them a and b or other and one or red and blue. It makes no difference.

API

socketPair.create(cb)     // creates or reuses a socket server
socketPair.closeAll()     // closes the server and all sockets