I'm using this websocket : https://github.com/websockets/ws and I want to send a message from one client to another. To begin with that, I wanted to echo the messages sent to the server, but the messages are just received by the client which has sent them. I know, that this works pretty easy with socket.io, but I have to use websockets/ws .
This is my server code:
var WebSocketServer = require('ws').Server
, wss = new WebSocketServer({ port: 8080 });
wss.on('connection', function connection(ws) {
ws.on('message', function incoming(message) {
console.log('received: %s', message);
ws.send(message); //This echoes the message
});
ws.send('Connection Opened');
});
You have to iterate over all the clients connected to the socket server. Replace your ws.send(message); with
wss.clients.forEach(function(client) {
client.send(message);
});
Related
I have below source code about socket server/client in nodejs.
const net = require('net');
net.createServer((socket)=>{
socket.pipe(socket);
socket.on('data', (data)=>{
console.log('receive data ', data.toString());
socket.write('this is server')
});
}).listen(3000);
console.log("Chat server running at port 5000\n");
let client = new net.Socket();
client.setEncoding('utf8');
client.connect(3000, '127.0.0.1', function() {
console.log('Connected');
client.write('Hello, server! Love, Client.');
});
client.on('data', function(data) {
console.log('Received: ' + data);
});
when I run above code, the server will send the data(which is from the client) back to the client. I know this is cased by socket.pipe(socket);. I want to keep that code and am looking for a way to separate the input/output data in client side like below:
client.on('data', function(data) {
if( the data is sent from client ){
...
} else {
//this is the data generated from server
}
});
Does anyone know how to do that in nodejs client side?
Actually you can separate out the data from client and server, depending upon what messages you emit or what you listen, from that you can distinguish between client and server.
The message you emit from server are the message, you received on the client side if client is listening to that messages, the message you emit by client are the message received on server if server is listening to the messages.
Below is the code for a socket.io
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', function(req, res){
res.send('<h1>SocketChat Server</h1>');
});
http.listen(3000, function(){
console.log('Listening on *:3000');
});
io.on('connection', function(clientSocket){
/* Here server is listening to client 'connectUser' message so here data is sent from client*/
clientSocket.on('connectUser', function(clientNickname, groupName) {
var message = "User " + clientNickname + " was connected." + clientSocket;
console.log(message);
clientSocket.emit('userConnected');
});
});
/* Here server is emitting message('userConnected') that will be received by client. */
From above you can see that how to distinguish the client and server messages.
I am trying to make a node js server with ws module. But it's not working. It says upgrade required.
My server side code:
var WebSocketServer = require('ws').Server;
wss = new WebSocketServer({port: 8080});
wss.on('connection', function(ws) {
ws.on('message', function(message) {
console.log('Msg received in server: %s ', message);
});
ws.send('Msg from server');
});
Client side code:
var WebSocket = require('ws');
var ws = new WebSocket('ws://localhost:8080/');
ws.on('open', function() {
ws.send('Msg from client');
});
ws.on('message', function(data, flags) {
console.log('Msg received in client: %s ', data);
});
Running npm update as an administrator should update the packages and solve your issue.
Here is a similar issue reported fixed by another user.
I didn't able to fix the problem. Then I used Socket.io. It works well.
I am building a desktop audio streaming application, which will be a client, i wish to connect to a server socket to stream audio, i have the host ip, the port and password. I am using node to connect:
var client = net.connect(serverDetails, function() { //'connect' listener
console.log('client created!');
});
client.on('connect', function() {
console.log('connected to: '+serverDetails.host+' port: '+serverDetails.port );
//client.write(serverDetails.password+'\r\n');
});
client.on('data', function(data) {
console.log('sending data to server!');
console.log(data.toString());
});
client.on('end', function() {
console.log('disconnected from server');
client.end();
});
at the moment it connects and the disconnects straight away, how can i pass the password so that the connection remains open? after which i can stream/send data to this socket.
I'm using the code below to test websockets on my browser:
this.webSocket = new WebSocket("ws://echo.websocket.org");
this.webSocket.onopen = function(evt) {
cc.log("Send Text WS was opened.");
};
this.webSocket.onmessage = function(evt) {
this.socketSendTextTimes++;
var textStr = "response text msg: " + evt.data + this.socketSendTextTimes;
cc.log(textStr);
};
The code works well, but if I connect to my own server running the code below:
var http = require('http');
var io = require('socket.io');
var server = http.createServer(function(req, res) {
// Send HTML headers and message
res.writeHead(200,{ 'Content-Type': 'text/html' });
res.end('<h1>Hello!</h1>');
});
var socket = io.listen(server);
socket.set('destroy upgrade', false);
socket.on('connection', function(client) {
client.on('message', function(event) {
console.log('Received message from client!', event);
});
client.on('disconnect', function() {
console.log('Server has disconnected');
});
});
server.listen(8080);
console.log('start to listen');
My browser displays:
hello!
But the listening socket does not do anything. How can I connect to the Socket.IO server using websockets?
Socket.IO uses alternate transport methods than the native websocket, even when emulating websockets themselves. You will need the client library to connect to Socket.IO sockets.
I have an express node.js server serving Socket.io. I would like the ability to make get requests to the express server that will automatically send a message to a channel.
var app = require('express').createServer()
, io = require('socket.io').listen(app)
app.listen(80);
app.get('/:channel/:message', function (req, res) {
//Code to create socket
socket.emit("sent from get", {channel:req.params.channel, message:req.params.message})
});
io.sockets.on('connection', function (socket) {
socket.on('sent from get', function (data) {
socket.broadcast.to(data.channel).emit('channel message', { message: data.message});
});
});
How to I create (and destroy) a socket connection in the app.get block?
(For clarity, I want to use this to send a quick message from a rails server when a particular object is saved, and have a message pushed to each appropriate user.)
io.sockets.in(req.params.channel).emit("channel message", {mes:req.params.message})
That will send a message to all users in the requested channel.
var chat = io.of('/chat').on('connection', function (socket) {
socket.emit('a message', { that: 'only', '/chat': 'will get' });
chat.emit('a message', { everyone: 'in', '/chat': 'will get' }); });
The following example defines a socket that listens on '/chat'