App.js code
///////////////
var express = require('express')
, app = express()
, http = require('http')
, server = http.createServer(app)
, io = require('socket.io').listen(server)
var file= require('./data'); // Gets the JSON data file
server.listen(8765);
console.log("Server Listening on 8765");
// routing
app.get('/', function (req, res) {
res.sendfile(__dirname + '/index.html');
});
// usernames which are currently connected to the chat
var usernames = {};
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);
});
//////////////////////////////////////////////////////////////
socket.on('add', function (data1,data2) {
var n = parseInt(data1);
var n2= parseInt(data2);
socket.emit('fill', n+n2);
});
/////////////////////////////////////////////////////////////
socket.on('readjson',function(datajson){
datajson=JSON.stringify(file);
socket.emit('filljs',datajson)
});
/////////////////////////////////////////////////////////////
// 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] = username;
// echo to client they've connected
socket.emit('updatechat', 'SERVER', 'you have connected');
// echo globally (all clients) that a person has connected
socket.broadcast.emit('updatechat', 'SERVER', username + ' has connected');
// update the list of users in chat, client-side
io.sockets.emit('updateusers', usernames);
});
///////////////////////
socket.on('uploaded',function(js){
var file=JSON.stringify(js);
console.log(file)});
//////////////////////
// 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');
});
});
//////////////////////////////////////
Html Code of Client named index.html
/////////////////////////////
<script src="/socket.io/socket.io.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<script>
var socket = io.connect('http://localhost:8765');
// on connection to server, ask for user's name with an anonymous callback
socket.on('connect', function(){
// call the server-side function 'adduser' and send one parameter (value of prompt)
socket.emit('adduser', prompt("What's your name?"));
////////////////////////
///////////////////////
});
// listener, whenever the server emits 'updatechat', this updates the chat body
socket.on('updatechat', function (username, data) {
$('#conversation').append('<b>'+username + ':</b> ' + data + '<br>');
});
////////////////////////////////////
socket.on('fill',function(data){
$('#txt').append("Result is :"+data);
});
socket.on('filljs',function(data){
//if(data!='')
$('#jsn').append(data);
});
//////////////////////////////////////
// listener, whenever the server emits 'updateusers', this updates the username list
socket.on('updateusers', function(data) {
$('#users').empty();
$.each(data, function(key, value) {
$('#users').append('<div>' + key + '</div>');
});
});
// on load of page
$(document).ready(function() {
// when the client clicks SEND
$('#datasend').click( function() {
var message = $('#data').val();
var message2 = $('#data2').val();
$('#data').val('');
$('#data2').val('');
$('#txt').empty();
// tell server to execute 'sendchat' and send along one parameter
// socket.emit('sendchat', message);
socket.emit('add',message,message2);
});
/////////////////////////////
$('#rdr').click(function(){
socket.emit('readjson');
});
/////////////////////////////
// when the client hits ENTER on their keyboard
$('#data').keypress(function(e) {
if(e.which == 13) {
$(this).blur();
$('#datasend').focus().click();
}
});
/////////////////////////////////////////////
$('#upload').bind("click",function()
{
var imgVal = $('#uploadImage').val();
// document.getElementById("#uploadImage").files[0];
socket.emit('uploaded',imgVal);
});
////////////////////////////////////////////
});
</script>
<html>
<head>
<link rel="stylesheet" type="text/css" href=style.css">
</head>
<div style="float:left;width:100px;border-right:1px solid black;height:300px;padding:10px;overflow:scroll-y;">
<b>USERS</b>
<div id="users"></div>
</div>
<div style="float:left;width:400px;height:250px;overflow:scroll-y;padding:10px;">
<div id="conversation"></div>
<p>
<input id="data" style="width:200px;" />
<input id="data2" style="width:200px"/>
</p>
<p>
<input type="button" id="datasend" value="send";
style="width:100;height:50" />
<br>
<textarea name="text" id="txt"></textarea>
</p>
<p>
<textarea name="jsn" id="jsn" rows="10" cols="50"></textarea></p>
<input id="rdr" type="button" value="Read Json" style="width:100;height:50"/>
<!-- <input type="submit" size="40">-->
</div>
<input type="file" name="image" id="uploadImage" size="30" />
<input type="submit" name="upload" id="upload" class="send_upload" value="upload" />
<html>
