When sending multiple messages to a Node.js tcp socket, they get streamed as a single message

Question

To show a simple example, I want to send multiple messages to a node.js tcp socket. I only want to send the second message when the first message is fully sent/drained. Howeve

Answer 1

You need to define a format for your message, so that your client can determine the beginning and end of a message within the socket stream. For instance, you could use a carriage return to mark the end of a message in your example.

Then you could use a split stream to read the messages separately in the client.

var net = require('net');
var split = require('split');
var server = net.createServer();

server.on('connection', function(socket){
  socket.write('First Message\n', function(){
    socket.write('Second Message\n')
  })
})

var client = new net.Socket();
client.setEncoding('utf8');

server.listen(9999, function(){
  client.connect(9999);
});

var stream = client.pipe(split());
stream.on('data',function(data){
    console.log(data);
});