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@dskanth
Created May 8, 2012 10:56
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Server file for Private chat using node.js and socket.io
var app = require('express').createServer()
var io = require('socket.io').listen(app);
var fs = require('fs');
app.listen(8008);
// routing
app.get('/', function (req, res) {
res.sendfile(__dirname + '/chat.html');
});
// usernames which are currently connected to the chat
var usernames = {};
function check_key(v)
{
var val = '';
for(var key in usernames)
{
if(usernames[key] == v)
val = key;
}
return val;
}
io.sockets.on('connection', function (socket) {
// when the client emits 'sendchat', this listens and executes
socket.on('sendchat', function (data) {
// we tell the client to execute 'updatechat' with 2 parameters
io.sockets.emit('updatechat', socket.username, data);
});
// when the client emits 'adduser', this listens and executes
socket.on('adduser', function(username){
// we store the username in the socket session for this client
socket.username = username;
// add the client's username to the global list
usernames[username] = socket.id;
// echo to client they've connected
socket.emit('updatechat', 'SERVER', 'you have connected');
// echo to client their username
socket.emit('store_username', username);
// echo globally (all clients) that a person has connected
socket.broadcast.emit('updatechat', 'SERVER', username + ' has connected: ' + socket.id);
// update the list of users in chat, client-side
io.sockets.emit('updateusers', usernames);
});
// when the user disconnects.. perform this
socket.on('disconnect', function(){
// remove the username from global usernames list
delete usernames[socket.username];
// update list of users in chat, client-side
io.sockets.emit('updateusers', usernames);
// echo globally that this client has left
socket.broadcast.emit('updatechat', 'SERVER', socket.username + ' has disconnected');
});
// when the user sends a private msg to a user id, first find the username
socket.on('check_user', function(asker, id){
//console.log("SEE: "+asker); console.log(id);
io.sockets.socket(usernames[asker]).emit('msg_user_found', check_key(id));
});
// when the user sends a private message to a user.. perform this
socket.on('msg_user', function(usr, username, msg) {
//console.log("From user: "+username);
//console.log("To user: "+usr);
//console.log(usernames);
io.sockets.socket(usernames[usr]).emit('msg_user_handle', username, msg);
fs.writeFile("chat_data.txt", msg, function(err) {
if(err) {
console.log(err);
} /*else {
console.log("The file was saved!");
}*/
});
});
});
@thonny3
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thonny3 commented Oct 9, 2023

bonjour

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