Ratchet
安裝
目前很多PHP套件都是用 Composer 來安裝,所以先安裝 Composer 是必要的
php -r "readfile('https://getcomposer.org/installer');" | php
mv composer.phar /usr/local/bin/composer
再來用 Composer 安裝 Ratchet
cd <project folder>
composer require cboden/ratchet
設定 Composer.json
{
"autoload": {
"psr-4": {
"MyApp\\": "src\"
}
},
"require": {
"cboden/ratchet": "^0.3.3"
}
}
MyApp 是該 Project 的名稱
Websocket Application
<Project Folder>/src/Broadcast.php
<?php
namespace MyApp;
use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;
class Broadcast implements MessageComponentInterface {
protected $clients;
public function __construct() {
$this->clients = new \SplObjectStorage;
}
public function onOpen(ConnectionInterface $conn) {
// Store the new connection to send messages to later
$this->clients->attach($conn);
echo "New connection! ({$conn->resourceId})\n";
}
public function onMessage(ConnectionInterface $from, $msg) {
$numRecv = count($this->clients) - 1;
echo sprintf('Connection %d sending message "%s" to %d other connection%s' . "\n"
, $from->resourceId, $msg, $numRecv, $numRecv == 1 ? '' : 's');
foreach ($this->clients as $client) {
if ($from !== $client) {
// The sender is not the receiver, send to each client connected
$client->send($msg);
}
}
}
public function onClose(ConnectionInterface $conn) {
// The connection is closed, remove it, as we can no longer send it messages
$this->clients->detach($conn);
echo "Connection {$conn->resourceId} has disconnected\n";
}
public function onError(ConnectionInterface $conn, \Exception $e) {
echo "An error has occurred: {$e->getMessage()}\n";
$conn->close();
}
}
Application 啓動程式
<Project Folder>/bin/server.php
<?php
use Ratchet\Server\IoServer;
use Ratchet\Http\HttpServer;
use Ratchet\WebSocket\WsServer;
use MyApp\Broadcast;
require dirname(__DIR__) . '/vendor/autoload.php';
$server = IoServer::factory(
new HttpServer(
new WsServer(
new Broadcast()
)
),
8880
);
$server->run();
執行 Application
php bin/server.php
各種 Client (Web, Android, iOS) 的實作,請看以下文章
Using websockets in native iOS and Android apps
到目前為止,Application 應該會把每個 client 傳送過來的訊息,會即時廣播給其它 client,算是完成了一個簡單的 websocket service。
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