php-wss

Web-socket server/client with multi-process and parse templates support on server and send/receive options on client

Library comes with several main options

Server:

• it`s a web-socket server for multiple connections with decoding/encoding for all events out of the box (with Dependency Injected MessageHandler)
• it has GET uri parser, so you can easily use any templates
• multiple process per user connections support, so you can fork processes to speed up performance deciding how many client-connections should be there
• broadcasting message(s) to all clients
• origin check
• ssl server run

Client:

• You have the ability to handshake (which is performed automatically) and send messages to server
• Receive a response from the server
• Initiate connection via proxy

How do I get set up?

Preferred way to install is with Composer.

perform command in shell

 composer require arthurkushman/php-wss

OR

just add

"require": {
  "arthurkushman/php-wss": ">=1.3"
}

to your projects composer.json.

Implement your WebSocket handler class - ex.:

<?php
use WSSC\Contracts\ConnectionContract;
use WSSC\Contracts\WebSocket;
use WSSC\Exceptions\WebSocketException;
use Monolog\Logger;
use Monolog\Handler\StreamHandler;

class ServerHandler extends WebSocket
{

    /*
     *  if You need to parse URI context like /messanger/chat/JKN324jn4213
     *  You can do so by placing URI parts into an array - $pathParams, when Socket will receive a connection
     *  this variable will be appropriately set to key => value pairs, ex.: ':context' => 'chat'
     *  Otherwise leave $pathParams as an empty array
     */

    public $pathParams = [':entity', ':context', ':token'];
    private $clients = [];

    private $log;

    /**
     * ServerHandler constructor.
     *
     * @throws \Exception
     */
    public function __construct()
    {
        // create a log channel
        $this->log = new Logger('ServerSocket');
        $this->log->pushHandler(new StreamHandler('./tests/tests.log'));
    }

    public function onOpen(ConnectionContract $conn)
    {
        $this->clients[$conn->getUniqueSocketId()] = $conn;
        $this->log->debug('Connection opend, total clients: ' . count($this->clients));
    }

    public function onMessage(ConnectionContract $recv, $msg)
    {
        $this->log->debug('Received message:  ' . $msg);
        $recv->send($msg);
    }

    public function onClose(ConnectionContract $conn)
    {
        unset($this->clients[$conn->getUniqueSocketId()]);
        $this->log->debug('close: ' . print_r($this->clients, 1));
        $conn->close();
    }

    /**
     * @param ConnectionContract $conn
     * @param WebSocketException $ex
     */
    public function onError(ConnectionContract $conn, WebSocketException $ex)
    {
        echo 'Error occured: ' . $ex->printStack();
    }

    /**
     * You may want to implement these methods to bring ping/pong events
     *
     * @param ConnectionContract $conn
     * @param string $msg
     */
    public function onPing(ConnectionContract $conn, $msg)
    {
        // TODO: Implement onPing() method.
    }

    /**
     * @param ConnectionContract $conn
     * @param $msg
     * @return mixed
     */
    public function onPong(ConnectionContract $conn, $msg)
    {
        // TODO: Implement onPong() method.
    }
}

To save clients with their unique ids - use getUniqueSocketId() which returns (type-casted to int) socketConnection resource id.

Then put code bellow to Your CLI/Console script and run

<?php
use WSSC\WebSocketServer;
use WSSCTEST\ServerHandler;
use WSSC\Components\ServerConfig;

$config = new ServerConfig();
$config->setClientsPerFork(2500);
$config->setStreamSelectTimeout(2 * 3600);

$webSocketServer = new WebSocketServer(new ServerHandler(), $config);
$webSocketServer->run();

How do I set WebSocket Client connection?

<?php
use WSSC\WebSocketClient;
use \WSSC\Components\ClientConfig;

$client = new WebSocketClient('ws://localhost:8000/notifications/messanger/yourtoken123', new ClientConfig());
$client->send('{"user_id" : 123}');
echo $client->receive();

That`s it, client is just sending any text content (message) to the Server.

Server reads all the messages and push them to Handler class, for further custom processing.

How to pass an optional timeout, headers, fragment size etc?

You can pass optional configuration to WebSocketClient's constructor e.g.:

<?php
use WSSC\WebSocketClient;
use WSSC\Components\ClientConfig;

$config = new ClientConfig();
$config->setFragmentSize(8096);
$config->setTimeout(15);
$config->setHeaders([
    'X-Custom-Header' => 'Foo Bar Baz',
]);

// if proxy settings is of need
$config->setProxy('127.0.0.1', '80');
$config->setProxyAuth('proxyUser', 'proxyPass');

$client = new WebSocketClient('ws://localhost:8000/notifications/messanger/yourtoken123', $config);

If it is of need to send ssl requests just set wss scheme to constructors url param of WebSocketClient - it will be passed and used as ssl automatically.

You can also set particular context options for stream_context_create to provide them to stream_socket_client, for instance:

$config = new ClientConfig();
$config->setContextOptions(['ssl' => ['verify_peer' => false, 'verify_peer_name' => false]]);

or any other available options see - https://www.php.net/manual/en/context.php.

BroadCasting

You may wish to broadcast messages by simply calling broadCast method on Connection object in any method of your ServerHandler class:

$conn->broadCast('hey everybody...');

// or to send multiple messages with 2 sec delay between them
$conn->broadCastMany(['Hello', 'how are you today?', 'have a nice day'], 2);

Origin check

To let server check the Origin header with n hosts provided:

$config = new ServerConfig();
$config->setOrigins(["example.com", "otherexample.com"]);
$websocketServer = new WebSocketServer(new ServerHandler(), $config);
$websocketServer->run();

Server will automatically check those hosts proceeding to listen for other connections even if some failed to pass check.

SSL Server run options

use WSSC\Components\ServerConfig;
use WSSC\WebSocketServer;

$config = new ServerConfig();
$config->setIsSsl(true)->setAllowSelfSigned(true)
    ->setCryptoType(STREAM_CRYPTO_METHOD_SSLv23_SERVER)
    ->setLocalCert("./tests/certs/cert.pem")->setLocalPk("./tests/certs/key.pem")
    ->setPort(8888);

$websocketServer = new WebSocketServer(new ServerHandler(), $config);
$websocketServer->run();

Avoid high CPU usage

use WSSC\WebSocketServer;
use WSSCTEST\ServerHandler;
use WSSC\Components\ServerConfig;

$config = new ServerConfig();

// Set the read socket iteration delay in miliseconds
$config->setLoopingDelay(1);

$webSocketServer = new WebSocketServer(new ServerHandler(), $config);
$webSocketServer->run();

How to test

To run the Server - execute from the root of a project:

phpunit --bootstrap ./tests/_bootstrap.php ./tests/WebSocketServerTest.php

To run the Client - execute in another console:

phpunit --bootstrap ./tests/_bootstrap.php ./tests/WebSocketClientTest.php

PHP7 support since version 1.3 - with types, returns and better function implementations.

Benchmarks:

iter	benchmark	subject	set	revs	mem_peak	time_avg	comp_z_value	comp_deviation
0	MaxConnectionsBench	benchConnect		10000	1,547,496b	4.831μs	+1.41σ	+6.35%
1	MaxConnectionsBench	benchConnect		10000	1,547,496b	4.372μs	-0.83σ	-3.76%
2	MaxConnectionsBench	benchConnect		10000	1,547,496b	4.425μs	-0.57σ	-2.59%

benchmark	subject	revs	its	mem_peak	mode	rstdev
MaxConnectionsBench	benchConnect	10000	3	1.547mb	4.427μs	±4.51%

As you may have been noticed, average time to send msg is 4.427μs which is roughly rounded to 4 microseconds within 10 000 have been sent 3 times in a row.

PS U'll see the processes increase named "php-wss" as CPP (Connections Per-Process) will grow and decrease while stack will lessen. For instance, if set 100 CPP and there are 128 connections - You will be able to see 2 "php-wss" processes with for ex.: ps aux | grep php-wss

Used by:

Supporters gratitude: