ratchet_client (CodeIgniter)

CodeIgniter library who allow you to make powerfull applications with realtime interactions by using Websocket technology and Ratchetphp (Socketo.me) 🚀🚀

📚 Dependencies

PHP 5.6+
CodeIgniter Framework (3.1.8+ recommanded)
Composer
PHP Socket extension enabled

🔰 Installation

➡️ Step 1 : Library installation by Composer

Just by running following command in the folder of your project :

composer require romainrg/ratchet_client

Or by adding following lines to your composer.json file :

"require": {
    "romainrg/ratchet_client": "^1.0.0"
},

Don't forget to include your autoload to CI config file :

$config['composer_autoload'] = FCPATH.'vendor/autoload.php';

➡️ Step 2 : Create library config file in your project (Optional)

You have to create in your CI config folder located in ./application/config/ratchet_client.php or the library will take his own config file based on host 0.0.0.0:8282

<?php
defined('BASEPATH') or exit('No direct script access allowed');

/**
 * Ratchet Websocket Library: config file
 * @author Romain GALLIEN <romaingallien.rg@gmail.com>
 * @var array
 */
$config['ratchet_client'] = array(
    'host' => '0.0.0.0',    // Default host
    'port' => 8282,         // Default port (be carrefull to set unused server port)
    'auth' => true,         // If authentication is mandatory
    'debug' => true         // Better to set as false in Production
);

➡️ Step 3 : Loading the library

You can add the following lines direclty in your Controller file or your MY_Controller global file

$this->load->add_package_path(FCPATH.'vendor/romainrg/ratchet_client');
$this->load->library('ratchet_client');
$this->load->remove_package_path(FCPATH.'vendor/romainrg/ratchet_client');

You'r almost done ✔️

Examples of use

➡️ Create your first App

It's not very difficult, the library will do your job and much more !

Edit your CI controller Welcome.php with the following lines (this will be our server)

class Welcome extends CI_Controller
{
    public function index()
    {
        // Load package path
        $this->load->add_package_path(FCPATH.'vendor/romainrg/ratchet_client');
        $this->load->library('ratchet_client');
        $this->load->remove_package_path(FCPATH.'vendor/romainrg/ratchet_client');

        // Run server
        $this->ratchet_client->run();
    }
}

Create CI controller User.php and add following lines

class User extends CI_Controller
{
    public function index($user_id = null)
    {
	// We load the CI welcome page with some lines of Javascript
        $this->load->view('welcome_message', array('user_id' => $user_id));
    }
}

Edit your CI view welcome_message.php with following lines (again 😜)

<?php defined('BASEPATH') OR exit('No direct script access allowed'); ?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Welcome to CodeIgniter</title>
    <style type="text/css">
    #container,code{border:1px solid #D0D0D0}::selection{background-color:#E13300;color:#fff}::-moz-selection{background-color:#E13300;color:#fff}body{background-color:#fff;margin:40px;font:13px/20px normal Helvetica,Arial,sans-serif;color:#4F5155}a,h1{background-color:transparent;font-weight:400}a{color:#039}h1{color:#444;border-bottom:1px solid #D0D0D0;font-size:19px;margin:0 0 14px;padding:14px 15px 10px}code{font-family:Consolas,Monaco,Courier New,Courier,monospace;font-size:12px;background-color:#f9f9f9;color:#002166;display:block;margin:14px 0;padding:12px 10px}#body{margin:0 15px}p.footer{text-align:right;font-size:11px;border-top:1px solid #D0D0D0;line-height:32px;padding:0 10px;margin:20px 0 0}#container{margin:10px;box-shadow:0 0 8px #D0D0D0}
    </style>
</head>
<body>
    <div id="container">
        <h1>Welcome to CodeIgniter!</h1>
        <div id="body">
            <div id="messages"></div>
            <input type="text" id="text" placeholder="Message ..">
            <input type="text" id="recipient_id" placeholder="Recipient id ..">
            <button id="submit" value="POST">Send</button>
        </div>
        <p class="footer">Page rendered in <strong>{elapsed_time}</strong> seconds. <?php echo  (ENVIRONMENT === 'development') ?  'CodeIgniter Version <strong>' . CI_VERSION . '</strong>' : '' ?></p>
    </div>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <script>
    var conn = new WebSocket('ws://localhost:8282');
    var client = {
        user_id: <?php echo $user_id; ?>,
        recipient_id: null,
        message: null
    };

    conn.onopen = function(e) {
        conn.send(JSON.stringify(client));
        $('#messages').append('<font color="green">Successfully connected as user '+ client.user_id +'</font><br>');
    };

    conn.onmessage = function(e) {
        var data = JSON.parse(e.data);
        if (data.message) {
            $('#messages').append(data.user_id + ' : ' + data.message + '<br>');
        }
    };

    $('#submit').click(function() {
        client.message = $('#text').val();
        if ($('#recipient_id').val()) {
            client.recipient_id = $('#recipient_id').val();
        }
        conn.send(JSON.stringify(client));
    });
    </script>
</body>
</html>

Ok you just created your first app ! ✔️ (easy with CTRL+C and CTRL+V)

➡️ Run the Websocket server

If you wan't to check you'r work, you have to run the server. Open you'r command prompt then type the command bellow in you'r project folder :

php index.php welcome index

If you see the message the message bellow, you are done (don't close your cmd) !

➡️ Test the App

Open three pages of your project on following url with different IDs : http://localhost/myproject/user/index/204 http://localhost/myproject/user/index/402 http://localhost/myproject/user/index/604

❗ In my example, recipient_id is defined by user_id, as you can see, it's the auth callback who defines recipient ids.

If you have something like that, everything is ok for you:

You can try is by typing and sending something in each page (see cmd for more logs).

Broadcast messages with your php App 💥 !

If you want to broadcast message with php script or something else you can use library like textalk/websocket (who is included in my composer.json as required library)

Note : The first message is mandatory and always here to perform authentication

$client = new Client('ws://0.0.0.0:8282');

$client->send(json_encode(array('user_id' => 1, 'message' => null)));
$client->send(json_encode(array('user_id' => 1, 'message' => 'Super cool message to myself!')));

Authentication & callbacks ♻️

The library allow you to define some callbacks, here's an example :

class Welcome extends CI_Controller
{
    public function index()
    {
        // Load package path
        $this->load->add_package_path(FCPATH.'vendor/romainrg/ratchet_client');
        $this->load->library('ratchet_client');
        $this->load->remove_package_path(FCPATH.'vendor/romainrg/ratchet_client');

        // Run server
        $this->ratchet_client->set_callback('auth', array($this, '_auth'));
        $this->ratchet_client->set_callback('event', array($this, '_event'));
        $this->ratchet_client->run();
    }

    public function _auth($datas = null)
    {
        // Here you can verify everything you want to perform user login.
        // However, method must return integer (client ID) if auth succedeed and false if not.
        return (!empty($datas->user_id)) ? $datas->user_id : false;
    }

    public function _event($datas = null)
    {
        // Here you can do everyting you want, each time message is received
        echo 'Hey ! I\'m an EVENT callback'.PHP_EOL;
    }
}

Auth type callback is called at first message posted from client.
Event type callback is called on every message posted.

What about Docker 🐳 ?

Easy to start with this command (php 7.1 used)

docker run -ti -v C:\Users\my_user\path_to_my_project\:/app -p 8282:8282 -w /app php:7.1-cli sh -c "php index.php welcome index"

Bugs 🐛 or feature 💪

Be free to open an issue or send pull request

To do 🚧

Origin check
WSS support
Add app routing fonctionnality
Websocket native library

For more CodeIgniter libraries, give me a 🍺😁

> Beer road

🔒 License

GNU General Public License v3.0