I have a node.js server running on the port 8443. Whenever I try to run the application through the browser my socket.io keeps connecting for about 20 seconds before the url turns red at the end.
Edit 3 : This is my directory structure and now with updated files
/var/www/html/nodetest/
Inside this
/node_modules
/app.js
/index.html
Node JS is installed on server.
Here is my main app.js code (as suggested in answer) :
var app = require('express')();
var server = require('http').createServer(app);
var io = require('socket.io')(server);
var fs = require('fs');
// Run server to listen on port 8443.
server = app.listen(8443, () => {
console.log('listening on *:8443');
});
io.listen(server);
io.sockets.on('connection', function(socket) {
socket.emit('message', 'this is the message emitted by server');
});
app.get('/', function(req, res){
fs.readFile(__dirname + 'index.html', function(error, data) {
res.writeHead(200);
res.end(data);
});
});
And this is my client browser side code:
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.5.1
/socket.io.min.js"></script>
<script type="text/javascript">
var websocket;
function onload() {
websocket = io.connect();
websocket.on('message',function(data) {
console.log('Received a message from the server!',data);
});
};
</script>
</head>
<body onload="onload()">
<div id="divId"></div>
</body>
</html>
Here is an image of the error
Now it shows 404 Error
I've modified the code as per your need. The code is working as it is showing message emitted by server after loading in browser's console as in the below image.
Server.js:
let express = require('express')
let app = express();
let http = require('http').Server(app);
let io = require('socket.io')(http);
let port = 8443;
var fs = require('fs');
var path = require('path');
app.get('/', function (req, res) {
fs.readFile(path.join(__dirname, 'index.html'), function (error, data) {
res.writeHead(200);
res.end(data);
});
});
// Run server to listen on port 8443.
http.listen(port, function () {
console.log(`listning on ${port}`);
});
io.on('connection', function (socket) {
socket.emit('message', 'this is the message emitted by server');
socket.on('disconnect', function () {
console.log('Client disconnected');
});
});
index.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title></title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.5.1/socket.io.min.js"></script>
<script type="text/javascript">
var websocket;
function onload() {
websocket = io().connect();
websocket.on('message', function (data) {
console.log('Received a message from the server!', data);
});
};
</script>
</head>
<body onload="onload();">
</body>
</html>
The out put is as below:
You are doing this in a manner I haven't seen yet. Here is an example that is working. The main difference is my webserver returns the file that I am connecting with the socket.
EDIT: I updated this to use your webserver. I modified it to make it make it server the index.html file.
Webserver:
var app = require('express')();
var server = require('http').createServer(app);
var io = require('socket.io')(server);
var fs = require('fs');
// Run server to listen on port 8000.
server = app.listen(8447, () => {
console.log('listening on *:8447');
});
io.listen(server);
io.sockets.on('connection', function(socket) {
socket.emit('message', 'this is the message emitted by server');
});
app.get('/', function(req, res){
fs.readFile(__dirname + '/index.html', function(error, data) {
res.writeHead(200);
res.end(data);
});
});
index.html
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.5.1/socket.io.min.js"></script>
<script type="text/javascript">
var websocket;
function onload() {
websocket = io.connect();
websocket.on('connect',function() {
console.log('Client has connected to the server!');
});
websocket.on('message',function(data) {
console.log('Received a message from the server!',data);
});
websocket.on('disconnect',function() {
console.log('The client has disconnected!');
});
};
</script>
</head>
<body onload="onload()">
<div id="divId"></div>
</body>
</html>
You are creating two separate servers and only starting one of them so your socket.io server is never started.
Change this:
var app = require('express')();
var server = require('http').createServer(app);
var io = require('socket.io')(server);
// Run server to listen on port 8000.
server = app.listen(8447, () => {
console.log('listening on *:8447');
});
to this:
var app = require('express')();
// Run server to listen on port 8000.
var server = app.listen(8447, () => {
console.log('listening on *:8447');
});
var io = require('socket.io')(server);
app.listen() creates its own server so you don't want to use both it and http.createServer().
Here's the code for app.listen() so you can see how it works:
app.listen = function(){
var server = http.createServer(this);
return server.listen.apply(server, arguments);
};
So, you can see that the server you created with http.createServer() and then bound to socket.io was never started with .listen().
You make a simple mistake. In your html file change socket.io library file source https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.5.1/socket.io.min.js to socket.io cdn sorce which is https://cdn.socket.io/socket.io-1.4.5.js.
After that run restart you app.
if yo getting 404 again, then in you html replace websocket = io.connect(); to websocket = io.connect(your_server_domain_or_host_name:nodejs_server_running_port);
Related
I want to connect frontend using PHP file with socket.io
How can I convert this js file code into PHP?
I want to implement this functionality in Laravel but right now I have tested this in PHP
I have connected with the help of NODE JS and it working fine.
HTML file:
<!DOCTYPE html>
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.3.0/socket.io.js"></script>
<script>
(function () {
const onMessage = (data) => {
console.log(data);
};
var connectToServer = function () {
var socket = io.connect('http://localhost:8000');
socket.on('message-name', onMessage);
};
connectToServer();
})();
</script>
</head>
<body>
</body>
</html>
Js file :
var amqp = require('amqp'),
express = require('express'),
http = require('http'),
app = express();
var server = http.createServer(app);
var io = require('socket.io').listen(server),
rabbitMq = amqp.createConnection({url: "amqp://***:***#x.x.x.x:1234//"});
// add this for better debugging
rabbitMq.on('error', function(e) {
console.log("Error from amqp: ", e.message);
});
// Wait for connection to become established.
rabbitMq.on('ready', function () {
rabbitMq.queue('1', {passive : true} , function(queue) {
queue.bind('#');
queue.subscribe(function (message) {
// Print messages to stdout
var buff = JSON.stringify(message);
var bufferData = JSON.parse(buff);
var messageData = bufferData['data']['data'];
io.sockets.on('connection', function (socket) {
socket.emit('message-name', messageData);
});
});
});
});
server.listen(8000);
I have created a chat application using the walk through on socket.io
I have added further content to the application, including database info, which meant I had to change the index.html to current session.php.
Now when I try and run the application, it just downloads a document with all the code for the page, and it does not run.
I have changed all the code to current session.php where necessary.
If I change the file name back to current session.html and change the relevant code, it then works fine....
I really need to have database info on the page, which is why it needs to be current session.php
Does anyone know why it does this? Is there a work around?
Code for index.js:
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/currentsession', function(req, res){
res.sendFile(__dirname + '/Staff/html/current session.php');
});
app.get('/question', function(req, res){
res.sendFile(__dirname + '/Student/Question.php');
});
io.emit('some event', { for: 'everyone' });
io.on('connection', function(socket){
socket.broadcast.emit('hi');
});
io.on('connection', function(socket){
socket.on('chat message', function(msg){
io.emit('chat message', msg);
});
});
var nsp = io.of('/currentsession');
nsp.on('connection', function(socket){
socket.join('/currentsession');
});
var nsp = io.of('/question');
nsp.on('connection', function(socket){
socket.join('/question');
});
var nsp = io.of('/currentsession');
nsp.on('connection', function(socket){
socket.on('disconnect', function(){
console.log('user disconnected');
});
});
var nsp = io.of('/currentsession');
nsp.on('connection', function(socket){
socket.on('go-to-page', function(data){
io.of('/question').emit('go-to-page', { href: "//selene.hud.ac.uk/u1555602"});
});
});
http.listen(4000, function(){
console.log('listening on *:4000');
});
code for current session.php
<?php include('server.php') ?>
<?php
if (!isset($_SESSION['username'])) {
$_SESSION['msg'] = "You must log in first";
header('location: sign in.php');
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Wireless Response System</title>
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="../css/style.css" rel="stylesheet" type="text/css">
</head>
<div class="heading">
<div class="php">
<?php
if (isset($_SESSION['username'])) :
$query = ("SELECT discipline FROM user WHERE username = '".$_SESSION['username']."'");
$resultset = $conn->query($query);
while ($user = $resultset->fetch()) {
echo '<h1> Discipline:'; echo $user["discipline"]; '</h1>'; }
endif
?>
</div>
<nav>
<ul>
<form action="">
<button>Send</button>
</form>
<script src="/socket.io/socket.io.js"></script>
<script src="/socket.io/socket.io.js"></script>
<script src="https://code.jquery.com/jquery-1.11.1.js"></script>
<script>
$(function () {
var socket = io('/currentsession');
$('form').submit(function(){
socket.emit('go-to-page', $('#m').val());
$('#m').val('');
return false;
});
socket.on('go-to-page', function (data) {
window.location.replace(data.href);
});
});
</script>
res.sendFile(__dirname + '/Staff/html/current session.php');
You have written an HTTP server using Node.js.
For some HTTP requests, your server will respond by reading the source code of a PHP file and then sending it to the browser.
You need to run the PHP program and send its output, not the source code.
Typically you would do this by using a server optimised for running PHP (such as Apache HTTPD) and having the browser make the request to that server and not the one created using Node.js.
I've heard that nodejs is the best choice for creating real-time chat application. So I decide to try one.
//on server side
//create nodejs server
var http = require('http');
var chatApp = http.createServer(function (request, response) {
//create an html chat form listened by this nodejs server
response.writeHead(200, {'Content-Type': 'text/html'});
response.write('<script src="http://localhost/nodejs/app/socket.io.js"></script><script src="http://localhost/nodejs/app/chat.client.js"></script><input type="text" id="message_input"><div id="chatlog"></div>');
response.end();
}).listen(8000);
//create websocket protocol via socket.io
var io = require('socket.io').listen(chatApp);
//send data to client
io.sockets.on('connection', function(socket) {
socket.on('message_to_server', function(data) {
io.sockets.emit("message_to_client",{ message: data["message"] });
});
});
//on client side
//get data from server response
var socketio = io.connect();
socketio.on("message_to_client", function(data) {
document.getElementById("chatlog").innerHTML = ("<hr/>" +
data['message'] + document.getElementById("chatlog").innerHTML);
});
//submit and send data to server via enter key
document.onkeydown = function(e){
var keyCode = (window.event) ? e.which : e.keyCode;
if(keyCode == 13){
var msg = document.getElementById("message_input").value;
socketio.emit("message_to_server", { message : msg});
document.getElementById("message_input").value = '';
}
};
Everything seems ok but php webapp intergration. How could I make it work as a part of a php web page?
As mentioned in my original comment, you can let your PHP application continue doing what it has been doing all along and just use NodeJS for handling web socket connections (via the socket.io) library. Here is an example of a simplified structure you could use:
Your chat.php page or Chat controller:
<?php
// Handle /chat route
// Perform any authentication with your database
// Render template
?>
<!-- The following HTML is rendered -->
<html>
<head>
...
<script src="http://localhost/nodejs/app/socket.io.js"></script>
<script src="http://localhost/nodejs/app/chat.client.js"></script>
</head>
<body>
...
<input type="text" id="message_input">
<div id="chatlog"></div>
...
<script>
var socketio = io.connect('http://localhost:8080');
socketio.on("message_to_client", function(data) {
document.getElementById("chatlog").innerHTML = ("<hr/>" +
data['message'] + document.getElementById("chatlog").innerHTML);
});
//submit and send data to server via enter key
document.onkeydown = function(e){
var keyCode = (window.event) ? e.which : e.keyCode;
if(keyCode == 13){
var msg = document.getElementById("message_input").value;
socketio.emit("message_to_server", { message : msg});
document.getElementById("message_input").value = '';
}
};
</script>
</body>
</html>
Your NodeJS application would look like the following. Note the lack of regular HTTP connection handling, which we now let PHP handle:
//create websocket protocol via socket.io
var io = require('socket.io').listen(8080);
//send data to client
io.sockets.on('connection', function(socket) {
socket.on('message_to_server', function(data) {
io.sockets.emit("message_to_client",{ message: data["message"] });
});
});
And that is the base you would use. As mentioned before in my comment, it is possible to extend this to add database-backed authentication mechanisms to the NodeJS portion of the server.
I'm developing a small project where I have a web page (index.html) loading in Express.js and it sends some data to a PHP script running on a MAMP server. The PHP script processes the data and returns a JSON encoded array back to the web page and finally the Node.js server sends data to connected clients using socket.io.
I have problems with the communication with PHP using jQuery Ajax. I send the data to PHP using POST and I know PHP receives that data but I don't know how to catch the response from PHP to know how the processing went.
I have no experience with Node.js. What can I do to make this thing work?
So far this is the code I have
Node.js - Express.js
var express = require('express')
, routes = require('./routes')
, user = require('./routes/user')
, db = require('./routes/db')
, http = require('http')
, socketio = require('socket.io')
, path = require('path');
var app = express();
app.set('port', process.env.PORT || 3000);
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser()); //Middleware
app.use('/', express.static(__dirname + '/public'));
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
app.get('/', routes.index);
app.get('/users', user.list);
var server = http.createServer(app);
server.listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
HTML Page
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Site</title>
<script src="js/jquery-2.0.3.min.js" type="text/javascript"></script>
</head>
<body>
<div id="formContainer">
<form enctype="multipart/form-data">
<input type="text" name="texto">
<button type="button" id="buttonSend">Enviar</button>
</form><br/><br/>
</div>
<script type="text/javascript">
$('#buttonSend').click(function(e){
e.preventDefault();
$.ajax({
url: 'http://localhost:8080/NodePHP/test.php',
type: 'POST',
dataType: "json",
data: {value: 1},
success: function(data){
if(data.success == true){
alert("Perfect!");
}
else{
alert("Error!");
}
},
error: function(xhr,status,error){
//alert("Error de llamada al servidor");
alert(xhr.responseText);
//$('#botonUsarFoto').css('display','block');
}
});
});
</script>
</body>
</html>
PHP Script
<?php
$number = $_POST['value'];
echo $number;
// move the image into the specified directory //
if ($number == 1) {
$data = array("success"=>"true");
echo json_encode($data);
} else {
$data = array("success"=>"false");
echo json_encode($data);
}
?>
Thanks in advance for any help
In order to make a request with Node, we'll use the http and querystring modules. Here's an example lovingly adopted from the Nodejitsu folks:
var http = require('http');
var querystring = require('querystring');
var data = querystring.stringify({
value: 1
});
var options = {
host: 'localhost',
path: '/myPHPScript',
method: 'POST'
};
callback = function(response) {
var str = '';
response.on('data', function (chunk) {
str += chunk;
});
response.on('end', function () {
console.log(str);
});
}
var req = http.request(options, callback);
req.write(data);
req.end();
Alternatively, you could use the request module, but first things first.
I have a few questions regarding using socket IO with PHP and such, I am new to nodejs/socket io so I know very little, I have just started using it over the past few days and I'm getting to the point where I will be implementing this onto my website (as of now I have just been building little test examples).
Question: Currently I have to add the port to my localhost in order to view it and have it work, obviously I can't have this when it's a live website, and I also can't do this when I use php pages (just have been doing examples with html) If I'm using port 4000 for my socket io server I have to go to: localhost:4000, however I need to be able to go to: localhost:8888/mysitefolder (8888 is the port for my MAMP, for php and everything) I have seen in questions where people have solved this but I have been unable to get it to work for my self.
Here is my code:
chat.js
var app = require('express').createServer(),
io = require('socket.io').listen(app);
app.listen(4000);
var users = [];
app.get('/', function (req, res) {
res.sendfile(__dirname + '/index.html');
});
io.sockets.on('connection', function (socket) {
socket.emit('connected');
socket.on('userID', function (userID) {
users.push(userID);
});
socket.on('message', function (message) {
socket.broadcast.emit('message-response', { data: message});
});
});
index.html
<title>Testing</title>
<script src="/socket.io/socket.io.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script>
function mktime(){
var newDate = new Date;
return newDate.getTime();
}
function appendMessage(data)
{
$("body").append(data+"<br />");
}
var socket = io.connect('http://localhost:4000');
socket.on('connected', function () {
//select id from database in real environment
socket.emit("userID", mktime());
});
socket.on('message-response', function (message) {
appendMessage(message.data);
});
$(document).ready(function(){
$('#input').keypress(function(event) {
if (event.keyCode != 13) return;
var msg = $("#input").val();
if (msg) {
socket.emit('message', msg );
appendMessage(msg);
$("#input").val('').focus();
}
});
});
</script>
<body>
<input type="text" id="input"><br>
</body>
I think you mean that you do not want to hard code a port or url in the client? Is that right?
In socket.io 0.8.7, you don't need to provide it. You can just use the following and it will be autodetected
var socket = io.connect();