Require the modules
var net = require("net");
Store the users and the connections number var count = 0, users = {};
Creates the server
var server = net.createServer(function (conn){
Stores the current nickname and set the utf8 encoding
var nickname;
conn.setEncoding('utf8');
Shows a message on the shell when you stablish a connection
conn.write(' > welcome to \033[92mnode-chat\033[39m!'
+ '\n > ' + count + ' other people are connected at this time.'
+ '\n > please write your name and press enter: ');
The number of connections++
count++;
When recives data it checks if there is a user in the storage with that name shows a message and return. Else shows a welcome message. Otherwise, if you input a message or any data (after have registered your nickname) shows it on the shell.
conn.on('data', function (data){
data = data.replace('\r\n', '');
if(!nickname) {
if(users[data]) {
conn.write('\033[93m > nickname already in use. Try again:\033[39m ');
return;
} else {
nickname = data;
users[nickname] = conn;
for(var i in users) {
users[i].write('\033[90m > ' + nickname + ' joined the room\033[39m\n');
}
}
} else {
for(var i in users) {
if(i != nickname) {
users[i].write('\033[96m > ' + nickname + ':\033[39m ' + data + '\n');
}
}
}
});
When you close or end the connection deletes your nickname from the storage, number of connections-- and shows a message.
conn.on('close', function(){
count--;
delete users[nickname];
conn.write('\033[90 > ' + nickname + ' left the room\033[39m\n');
});
});
Server on port 3000
server.listen(3000, function (){
console.log('\033[96m server listening on *:3000\033[39m');
});
I have a bug in my chat. I stablish two telnet connections using de shell. But when I close one the other one close two, and shows me a error message. What is wrong with my code?