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streamchat.js
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streamchat.js
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#!/usr/bin/env node
var sys = require('util');
var fs = require('fs');
var app = require('express').createServer();
var io = require('socket.io').listen(app);
io.set('log level', 1);
var MAXNICKLENGTH = 15;
var UID_LENGTH = 20;
var LISTEN_PORT = 4000;
var userlist = {};
var UID = {};
var clientbuf = {};
var nickbuf = {};
function getUsers() {
users = [];
for (key in userlist) {
users.push(userlist[key]);
}
return users;
}
String.prototype.trim = function() {
return this.replace(/^\s+|\s+$/g, "");
};
app.get('/', function(req, res) {
var rs = fs.createReadStream(__dirname + '/streamchat.html');
sys.pump(rs, res);
});
io.sockets.on('connection', function(client) {
var nickname = "";
if ('undefined' === typeof userlist[client.id]) {
client.json.send({
event : 'ERRAUTH',
data : 'Not Logged In!'
});
}
client.json.send({
event : 'NOTIFY',
data : '+++Welcome to Node Chat Server powered by nodejs! +++ Enter ' + 'nick name to continue'
});
client.on('message', function(message) {
if ('undefined' === typeof userlist[client.id]) {
var data = message.data;
if (!(data.substr(-1).length === 0)) {
nickbuf[client.id] = data;
} else {
if ('undefined' === typeof nickbuf[client.id]) {
client.json.send({
event : 'ERRAUTH',
data : 'Not Logged In!'
});
} else {
nickname = escape(nickbuf[client.id]).trim();
delete nickbuf[client.id];
if (nickname.match(/^[a-z][a-z0-9_|.\[\]\{\}`]+$/i)) {
if (nickname.length > 15)
nickname = nickname.substr(0, 15);
client.json.send({
event : 'NOTIFY',
data : 'Welcome ' + nickname
});
io.sockets.json.send({
event : 'NOTIFY',
data : '>>> ' + nickname + ' joined.'
});
UID[client.id] = ((new Date()).getTime() + "" + Math
.floor(Math.random() * 1000000)).substr(0, UID_LENGTH);
userlist[client.id] = nickname;
clientbuf[client.id] = new Buffer(1, 'ascii');
client.json.send({
event : 'NICK',
data : nickname
});
} else {
client.json.send({
event : 'ERRNICK',
data : 'Invalid Nickname!'
});
}
}
}
} else {
var clientevent = message.event;
var data = message.data;
if (data.match(/^\/me\ (.*)$/i)) { // check action pattern
action = data.match(/^\/me\ (.*)$/i)[1];
io.sockets.json.send('*' + nickname + ' ' + action);
} else if (data.match(/^\/clear/i)) { // check action pattern
client.json.send({
event : 'CMD',
data : 'clear'
});
} else if (data.match(/^\/nick\ ([a-z][a-z0-9_|.\[\]\{\}`]{1,14})$/i)) { // check
// nick
// change
// pattern
newnick = data.match(/^\/nick\ ([a-z][a-z0-9_|.\[\]\{\}`]+)$/i)[1];
newnick = escape(newnick.trim());
if (newnick.length > 15)
newnick = newnick.substr(0, 15);
oldnick = userlist[client.id];
userlist[client.id] = newnick;
client.json.send({
event : 'NICK',
data : newnick
});
io.sockets.json.send({
event : 'NOTIFY',
data : oldnick + ' is now known as ' + newnick
});
} else {
io.sockets.json.send({
event : 'MSG',
uid : UID[client.id],
data : '<' + userlist[client.id] + '> ' + data
});
}
}
});
client.on('disconnect', function() {
io.sockets.json.send({
event : 'NOTIFY',
data : '>>> ' + userlist[client.id] + ' has left.'
});
delete userlist[client.id];
delete UID[client.id];
delete clientbuf[client.id];
delete nickbuf[client.id];
});
setInterval(function() {
client.json.send({
event : 'USERLIST',
data : JSON.stringify(getUsers())
});
}, 2000);
});
app.listen(LISTEN_PORT);