lirc_webのapp.jsの一部をこんな感じで書き換えた

app.js

app.get('/api/stream', function(req, res) {
    console.log('connection catched');
    var sock = req.socket;
    conns[sock.fd] = sock;
    res.on('close', function() {
      delete conns[sock.fd];
      console.log('disconnected: ' + Object.keys(conns).join(", "));
    });
    sock.on('close', function() {
      delete conns[sock.fd];
    });
    sock.on('end', function() {
        delete conns[sock.fd];
    });
    res.writeHead(200, {
      'Content-Type': 'application/json'
    });
    res.write("\n");
});

// API endpoint
app.post('/remotes/:remote/:command', function(req, res) {
    console.log("Sending " + req.params.command + " to " + req.params.remote);
    //lirc_node.irsend.send_once(req.params.remote, req.params.command, function() {});
    var data = JSON.stringify({"remote":req.params.remote,"command":req.params.command}) + "\n";
    Object.keys(conns).forEach(function(fd) {
      var sock = conns[fd];
      sock.write(data);
    });
    res.setHeader('Cache-Control', 'no-cache');
    res.send(200);
});