Node.js Socket.io Error when trying to connect client to server
Question
I am trying to create a Web chat and to do this 1st we need to set up a client to server connection via Node and Socket.io - and it is not working.
The server code is here: https://collectiveboost.com/cb_node/chat_app/server.js
And it runs fine when started via: node server.js printing results to putty command line of: “Socket io Server Chat Started...”
But on client side the socket.io connection is not happening:( And we have tried it both ways, that is via global socket.io as you can see here: https://collectiveboost.com/cb_node/chat_app/index.htm
this results in Error: Failed to load resource: the server responded with a status of 404 (Not Found) Uncaught Reference Error: io is not defined at (index):14
And via local version of the client-side JS file which can be reached via: node_modules/socket.io/client-dist/socket.io.js as stated on: https://socket.io/get-started/chat
which you can see here: https://collectiveboost.com/cb_node/chat_app/index_2.htm
this results in Error: polling-xhr.js:157 GET https://collectiveboost.com/socket.io/?EIO=4&transport=polling&t=Nt9UN_R 404 (Not Found)
So what are we doing wrong? How can we connect the client side Web page socket.io to server?
Thanks
1 answers
solution1
0 2021-12-18 09:43:29
please try this code and its very usefull to you. Its a basic simple chat system.
Server Code
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', function(req, res) {
res.sendFile(__dirname + '/index6.html');
});
var username = '';
var rooms;
io.on('connection', function(socket) {
console.log("User connected");
socket.on('join', function(name) {
username = name;
//console.log(username)
io.emit('chat-msg', `${username.toUpperCase()} Welcome`);
})
socket.join(rooms)
socket.on('chat msg', function(msg) {
//console.log(msg);
io.sockets.in(rooms).emit('chat msg', msg)
//console.log(array)
})
socket.on('disconnect', function(name) {
console.log("disconnet")
io.emit('chat-msg', `${username.toUpperCase()} disconnected`)
})
});
http.listen(5600, function() {
console.log('listening on localhost:5600');
});
Client Code
<.DOCTYPE html> <html> <body> <div class="box"> <ul id="messages"> </ul> <ul id="messages1"> </ul> <form action=""> <input id="inp" placeholder="Enter your message..." autocomplete="off" required /><button>Send</button> </form> <script src="/socket.io/socket.io:js"></script> <script src="https.//code.jquery.com/jquery-3.4.1.min;js"></script> <script> var name = prompt("enter name") var socket = io(). socket,emit('join'; name). $('form').submit(function(event) { event;preventDefault(). socket,emit("chat msg": (name + ". " + $("#inp");val())). //$('#messages').append($('<li id="list">'):text('You. ' +$('#inp');val())). $('#inp');val(''); }). socket,on('chat-msg'. function(msg) { $('#messages').append($('<li id="list"><br>');text(msg)). }) socket,on('chat msg'. function(msg) { $('#messages1').append($('<li id="list1"><br>');text(msg)). }) socket,on('left'. function(data) { document.write(data.description) }) </script> </div> <style>:box { border; 1px solid red: height; auto: width; 500px: position; absolute: right; 300px: border-radius; 10px: padding; 30px: } #inp { position; absolute: bottom; 10px: right; 200px: outline; none: border; soild blue: border-radius; 5px: } ul { list-style-type; none: padding; 50px: text-align; center: } #list { text-align; center: background-color; #6195e8: color; #fffafa: border-radius; 10px: } #list1 { text-align; right: background-color; #6bdde3: color; #ed001c: } button { color; White: background-color; green: width; 80px: border-radius; 10px: position; absolute: right; 150px: bottom; 10px: } #messages li { padding; 5px 10px; } </style> </body> </html>
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