syndilights/displayclienthtml/ws_udp.js

99 lines
2.5 KiB
JavaScript

// listener UDP version
// it wants some binary data
//
// data format
// basically it's the frame format of the frame server
// byte "s2l\n<8<18 "
// byte z (can be ignored)
// byte \n
// byte windows 12*4 RGBA values '\n' repeated 8 times for the 8 rows
// byte segments 8*4 RGBA values '\n' repeated 12 times for the top row
// set to true for debugging and seeing messages sent to server
var verbose = false;
var count = 0;
var clients = {};
var http = require('http');
var dgram=require('dgram');
var server = http.createServer(function(request, response) {});
server.listen(1234, function() {
console.log((new Date()) + ' Webserver is listening on port 1234');
});
var WebSocketServer = require('websocket').server;
wsServer = new WebSocketServer({
httpServer: server
});
var server = dgram.createSocket('udp4');
server.bind(4422, '127.0.0.1');
console.log((new Date()) + ' UDP display is listening on port 4422');
wsServer.on('request', function(r) {
var connection = r.accept('echo-protocol', r.origin);
// Specific id for this client & increment count
var id = count++;
// Store the connection method so we can loop through & contact all clients
clients[id] = connection
console.log((new Date()) + ' Connection accepted [' + id + ']');
// clients[id].sendUTF("Welcome to the server. You are connected. This message has been pushed to you.");
// Create event listener
connection.on('message', function(message) {
// The string message that was sent to us
var msgString = message.utf8Data;
// Loop through all clients
for(var i in clients){
// Send a message to the client with the message
clients[i].sendUTF(msgString);
}
});
// Create event listener for close
connection.on('close', function(reasonCode, description) {
delete clients[id];
console.log((new Date()) + ' Peer ' + connection.remoteAddress + ' disconnected.');
});
});
var sendTime = function () {
var now, i = 0;
// get time now
now = new Date();
// send time to all clients
for(i in clients) {
// Send a message to the client with the message
clients[i].sendUTF(now);
}
// repeat in 5 seconds
setTimeout(sendTime, 5000);
};
server.on("message", function (msg, rinfo) {
if( verbose ) {
console.log("server got (" + msg.length + ") bytes: " + msg + " from " +
rinfo.address + ":" + rinfo.port);
}
for(i in clients) {
// Send a message to the client with the message
clients[i].sendUTF(msg);
}
});
// every 5 seconds send the date/time