Socket handoff in Node.JS

README.md

Same idea as https://gist.github.com/2500291, with node.js. Do

$ node forkpeer.js

It'll print out its pid. Then

$ curl http://localhost:8000/

To reload it, use

$ kill -s HUP <pid>

So, e.g., change the message in the response, sighup, and make another request to see the change.

forkpeer.js

var http = require('http'),
child_process = require('child_process');

var srv = http.createServer(doReq);

function forkforkfork() {
  var child = child_process.fork('./forkpeer', ['--child']);
  child.send('go go go', srv._handle);
  return child;
}

process.on('SIGHUP', function() {
  forkforkfork();
  srv.close();
});

if (process.argv.length > 2 && process.argv[2] == '--child') {
  process.on('message', function(_, handle) {
    srv.listen(handle, function() {
      console.log("Process " + process.pid + " listening");
    });
  });
}
else {
  srv.listen(8000, function() {
    console.log("Process " + process.pid + " listening on 8000");
  });
}

function doReq(_req, res) {
  res.writeHead(200);
  res.end("Hello from process " + process.pid + "\n");
}