Stream stdout from child process to browser via expressjs

Question

We have an app built using nodejs, express and child_process.spawn. One requirement is that we need to spawn a process at runtime and capt

Answer 1

The response object of an Express route is also an instance of writable stream, so that allows you to pipe the child process' stdio streams to the response.

app.get('/path', function(req, res) {
  var child = spawn('ls', ['-al']);
  child.stdout.pipe(res);
});