I'm trying to build a simple socket.io-client using nodejs, but I'm facing a trouble...
I'm connecting with the socket.io (server), but I can't emit any data. Follow bellow my simple code:
Client Side:
var socketIO = require('socket.io-client')('http://serverdns:3000');
socketIO.on("dashboard", (data) => {
console.log(data);
});
socketIO.on('connect', function(){
console.log("Connected with the translator service.");
socketIO.emit('dashboard', 'teste');
});
socketIO.on('disconnect', function(){
console.log("Disconnected from the translator service");
});
socketIO.on('error', function(err){
console.log(err);
});
Socket.io version: 2.1.1 (I've tried to use old versions but the same problem happens).
The connect event works, the log "Connected with the translator service." is generated, but emit does not work.
Server side:
var server = require('http').createServer();
var ioServer = require('socket.io')(server, { pingInterval: 2000, pingTimeout: 60000, cookie: false });
class SocketServer {
constructor() {
var self = this;
ioServer.on('connection', function (client) {
console.log('[SOCKETIO] AVAILABLE');
client.on('main', self.main);
client.on('disconnect', self.disconnect);
});
server.listen(3000);
}
getSocket(){
return ioServer;
}
main(data) {
console.log(data);
}
disconnect() {
console.log("[SOCKETIO] DISCONNECTED");
}
}
module.exports = new SocketServer();
Anyone can help me?
Are there anything I'm not seeing?
Thanks a lot.
Right now you are emitting to the event dashboard from client. But on the server side you have no code that is handling that event. You are currently logging the event main which does not match with what you're emitting. Try client.on('dashboard', self.dashboard). Make your own dashboard function.
Related
how to emit the event with using particular_room [io.to(socket.id).emit('sendData') ]at cross domain
I've tried this,
server side
io.emit('sendData', data);
clientside
var socket = io('https://localhost:3000/', { transports: ['websocket'] });
socket.on('sendData', function (data) {
console.log(data);
})
above syntax are perfectly working on cross domain
but I want to emit with particular room at cross domain
io.to(socket.id).emit('sendData', data)
io.broadcast.to(socketid).emit('message', 'for your eyes only'); //sending to individual socketid
Reference link -> Cross-domain connection in Socket.IO
Kindly help to solve this!
I Understood your code, you just emit the initial connection on the socket.io server
io.on("connection", function(socket){
socket.emit('sendsocketid', data);
})
Cross-domain clientside
var socket = io('https://localhost:3000/', { transports: ['websocket'] });
var obj= [];
socket.on('sendsocketid', function (data) {
console.log(data);
// Now You Can Customize the or add the client Socket .id
var NewSocketid = {
id: socket.id
}
Obj.push(data, NewSocketid)
socket.emit("emitnewSocketId", Obj)
})
socket.on("emitnewSocketId", function(data){
consoleo.log(Obj[1].NewSocketid)
//Now You can emit the new socket id
io.to(Obj[1].NewSocketid).emit('sendData', data)
})
I want a client to emit a signal, and test the behaviour of my socket.io server when that signal is received. I have looked at this question and these blog posts:
jest
mocha, chai
but they seem to be directed at testing the client, rather than the server.
Here is an example of something that I am trying to implement:
test('should communicate with waiting for socket.io handshakes', (done) => {
socket_client.emit('example', 'some messages');
setTimeout(() => {
socket_server.on('example', message => {
expect(message).toBe('INCORRECT MESSAGE');
});
done();
}, 50);
When I run my test suit, this should fail, but doesn't.
Does anyone have a simple example of testing this sort of behaviour?
Currently I'm using jest but any framework is fine.
My set up and teardown of the socket.io server test is as below:
import * as http from 'http';
import ioBack from 'socket.io';
let socket_client;
let httpServer;
let httpServerAddr;
let socket_server;
beforeAll((done) => {
httpServer = http.createServer().listen();
httpServerAddr = httpServer.address();
socket_server = ioBack(httpServer);
done();
});
afterAll((done) => {
socket_server.close();
httpServer.close();
done();
});
I am using mocha for testing. But I am not sure what you are doing. In your backend socket server there is no listener that you defined.
Here is a small example for a test. Maybe that helps?!
Test case
var sockethost = websocketUrl;
socketclient = io.connect(sockethost);
socketclient.on('customerId', function(data) {
var data = {
customerId: 10,
}
socketclient.emit('customerId', data);
});
Server:
var io = require('socket.io')(http);
io.sockets.on('connection', function (socket) {
socket.emit('customerId', null);
});
So that is a very simple test. The backend server sends out the connected client 'customerId' the client has a listener for customerId and sends back its customerId. You can also do the other way around, that you have a listener in server, and an emit in client. But I am not completely sure what you are trying to do.
am connecting xml socket to node.js websocket. Its showing connect message first. When a message send to server, its showing socket close error.
import flash.net.XMLSocket;
var client_socket: XMLSocket = new XMLSocket();
client_socket.connect("localhost",8080);
client_socket.addEventListener(DataEvent.DATA, on_serverData);
client_socket.addEventListener(Event.CONNECT, on_serverConnection);
client_socket.addEventListener(IOErrorEvent.IO_ERROR,IOerror);
client_socket.addEventListener(Event.CLOSE,socketclose);
client_socket.addEventListener(SecurityErrorEvent.SECURITY_ERROR,socketsecurityerror);
function socketsecurityerror(event:SecurityErrorEvent)
{
trace("socketsecurityerror");
}
function IOerror(event : IOErrorEvent):void
{
trace("IOerror");
}
function socketclose(event : Event):void
{
trace("socketclose");
}
function on_serverConnection(event:Event)
{
trace("connected");
var o :Object= new Object();
o.hello = "initial_start" ;
// client_socket.send(JSON.stringify(o));
}
function on_serverData(event:DataEvent)
{
trace("errorrrrrrrrrr"+event.target.data);
}
What could be the issue, as its showing connect message and socketclose error only while sending data to websocket.
The below code is my websocket server.
var WebSocketServer = require('ws').Server
, wss = new WebSocketServer({ port: 8080 });
wss.on('connection', function connection(ws)
{
ws.on('message', function incoming(message) {
});
ws.on('close', function() {
});
ws.on('error', function() {
});
});
Will it be an issue with xmlsocket and websocket communication?
Thanks
XMLSocket cannot connect to a Websocket.
Websockets have a handshake and a protocol (see https://www.rfc-editor.org/rfc/rfc6455), whereas XMLSocket is just for sending and receiving XML data.
If you want to use websockets in AS3, try something like https://github.com/theturtle32/AS3WebSocket
i am trying to do a very simple real time notification with socket.io. for some reason i can't receive data or fire the event from server to client but from client to server yes. let me show my code:
Client Side
ngOnInit() {
this.socket.on('connect', function (res: any) {
console.log('Socket.io is connected on client side!'); // it shows on client console
});
this.socket.on('alarmsreceived', function (res: any) {
console.log(res + ' i am here now'); // is not firing
});
}
// this method fires from a click button
objectStatus = () => {
this.socket.emit('alarmsystem', 'i am client going to server');
}
Server
var io = require('socket.io').listen(server);
var connections = [];
io.of('/api/v1/monitoring').on('connect', function(socket){
connections.push(socket);
console.log('Connected %s sockets', connections.length); // i see connection on cmd
socket.on('disconnect', function() {
connections.splice(connections.indexOf(socket), 1);
console.log('Connected %s sockets', connections.length);
});
socket.on('alarmsystem', function(res) {
console.log(res); // this shows me the message from client
io.sockets.emit('alarmsreceived', 'I am server heading to client');
});
})
it seems pretty straight forward, but not firing the client event. Can someone help me what i am doing wrong here? Thanks in advance
I'm trying out node.js and socket.io. I wan't to use to remove a ping function I have to get updates from my server. Here is an example code of what I'm doing:
var app = require('http').createServer(),
io = require('socket.io').listen(app),
cp = require('child_process');
app.listen(8080);
//I check a global value for all the connected users from the php command line
var t = setInterval(function(){
cp.exec('/usr/bin/php /Users/crear/Projects/MandaFree/symfony api:getRemainingMessages',
function(err, stdout){
if (err) {
io.sockets.emit('error', 'An error ocurred while running child process.');
} else {
io.sockets.emit('change', stdout);
}
console.log('Remaining messages: ' + stdout);
});
}, 3000);
var remaining = io.of('/getRemainingMessages')
.on('connection', function(socket){
socket.on('disconnect', function(){});
});
The Issue here, is that when I call io.sockets.emit() the debug console tells me it is doing something, but it looks like it is not getting to the clients. Because they are doing nothing.
I use to have one interval for every connected client, and when I used socket.emit() it did worked. But it is not the optimal solution.
UPDATE:
Here is my client side code.
var remaining = io.connect('http://127.0.0.1:8080/getRemainingMessages');
remaining.on('change', function(data){
console.log('Remaining messages: ' + data );
$('#count').html(data);
});
remaining.on('error', function(error){
console.log(error);
});
Had a very similar issue couple of days back and looks like socket.io had some changes in the API. I have never worked with symfony and am hoping the issues are the same.
I have a working demo of socket.io sending and receiving a message - uploaded to https://github.com/parj/node-websocket-demo as a reference
Essentially two changes
On Server side - changed socket.on to socket.sockets.on
var socket = io.listen(server);
socket.sockets.on('connection', function(client)
On Client side - URL and port not required as it is autodetected.
var socket = io.connect();
This has been tested using Express 2.5.2 and Socket.io 0.8.7
I have amalgamated your server code with mine, would you be able to try this on the server and my client javascript and client html just to see if it is working?
var socket = io.listen(server);
socket.sockets.on('connection', function(client){
var connected = true;
client.on('message', function(m){
sys.log('Message received: '+m);
});
client.on('disconnect', function(){
connected = false;
});
var t = setInterval(function(){
if (!connected) {
return;
}
cp.exec('/usr/bin/php /Users/crear/Projects/MandaFree/symfony api:getRemainingMessages',
function(err, stdout){
if (err) {
client.send('error : An error ocurred while running child process.');
} else {
client.send('change : ' + stdout);
}
console.log('Remaining messages: ' + stdout);
});
}, 3000);
t();
});