swoole——從入門到放棄（一）

swoole——從入門到放棄（一）

1、swoole的源碼包安裝

1. 下載swoole源碼：git clone https://gitee.com/swoole/swoole.git

2. 經過phpize（擴展php擴展模塊，創建php外掛模塊）：

   • cd swoole
   • 執行：your/phpize/path
   • ./configure --with-php-config=your/php/path/bin/php-config
   • make && make install

3. 能夠看到swoole.so的位置

   • 個人位置是：/opt/soft/php/lib/php/extensions/no-debug-non-zts-20170718/

4. 配置php.ini

   • 添加extension=swoole.so
5. 經過php -m命令，能夠看到php的擴展模塊

6. 檢測swoole安裝成功而且php支持swoole

   • cd your/swoole/path/examples/server
   • php echo.php（若是進程被阻塞，則說明成功）
   • netstat -anp | grep 9501（查看swoole開啓的端口號）

---

2、網絡通訊引擎

學習swoole須要去翻閱文檔， swoole文檔

1.經過swoole建立一個最簡單的tcp服務

tcp服務端（tcp_server.php）

//建立Server對象，監聽 127.0.0.1:9501端口
$serv = new swoole_server("127.0.0.1", 9501);

$serv->set([
    'worker_num' => 4, // worker進程數，cpu 1-4倍
    'max_request' => 100,
]);

/**
 * 監聽鏈接進入事件
 * $fd 客戶端鏈接服務端的惟一標識
 * $reactor_id 線程id
 */
$serv->on('connect', function ($serv, $fd, $reactor_id) {
    echo "Client: {$fd} - {$reactor_id} - Connect.\n";
});

//監聽數據接收事件
$serv->on('receive', function ($serv, $fd, $reactor_id, $data) {
    $serv->send($fd, "Server: ".$data);
});

//監聽鏈接關閉事件
$serv->on('close', function ($serv, $fd) {
    echo "Client: Close.\n";
});

//啓動服務器
$serv->start();

tcp客戶端（tcp_client.php）

// 建立tcp客戶端
$client = new swoole_client(SWOOLE_SOCK_TCP);

// 鏈接tcp服務端
if (!$client->connect("127.0.0.1", 9501)) {
    echo '鏈接失敗';
    exit;
}

// php cli
fwrite(STDOUT, '請輸入：');
$msg = trim(fgets(STDIN));

// 發送消息給tcp服務端
if (!$client->send($msg)) {
    echo '發送消息失敗';
    exit;
}

// 接收
$result = $client->recv();
echo $result;

2.拓展：php的四種回調

• 匿名函數

$server->on('Request', function ($req, $resp) {
    echo "hello world";
});

• 類靜態方法

class A
{
    static function test($req, $resp)
    {
        echo "hello world";
    }
}
$server->on('Request', 'A::Test');
$server->on('Request', array('A', 'Test'));

• 函數

function my_onRequest($req, $resp)
{
    echo "hello world";
}
$server->on('Request', 'my_onRequest');

• 對象方法

class A
{
    function test($req, $resp)
    {
        echo "hello world";
    }
}

$object = new A();
$server->on('Request', array($object, 'test'));

小技巧：查看開啓的worker進程： ps aft | grep tcp_server.php

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3. udp的服務端和客戶端能夠根據文檔自行建立

---

4. http服務

// 監聽全部地址和9501端口
$http = new swoole_http_server('0.0.0.0', 9501);

// 動靜分離配置
$http->set([
    // 開啓靜態請求
    'enable_static_handler' => true,
    // 靜態資源目錄
    'document_root' => '/opt/app/code1/',
]);

$http->on('request', function ($request, $response) {
    // 獲取get請求的參數
    $param = json_encode($request->get);
    // 設置cookie
    $response->cookie('name', 'ronaldo', time() + 1800);
    // 輸出到頁面
    $response->end("<h1>Hello Swoole - {$param}</h1>");
});

// 開啓http服務
$http->start();

---

5.經過swoole建立websocket服務

websocket服務端（websocket_server.php）

// 監聽全部地址和9502端口
$server = new swoole_websocket_server('0.0.0.0', 9502);

// 動靜分離配置
$server->set([
    // 開啓靜態請求
    'enable_static_handler' => true,
    // 靜態資源目錄
    'document_root' => '/opt/app/swoole/websocket',
]);
$server->on('open', function ($server, $request) {
    echo "server：handshake success with fd - {$request->fd}\n";
});

$server->on('message', function ($server, $frame) {
    echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}\n";
    $server->push($frame->fd, "this is server");
});

$server->on('close', function ($server, $fd) {
    echo "client - {$fd} - close\n";
});

$server->start();

websocket客戶端 （websockt_client.html）

// 建立websocket實例
        var websocketURL = "ws://www.rona1do.top:9502";
        var websocket = new WebSocket(websocketURL);

        // 實例化對象的onopen屬性
        websocket.onopen = function (ev) {
            websocket.send("hello-websocket");
            console.log("connect-swoole-success");
        }

        // 實例化對象的onmessage屬性，接收服務端返回的數據
        websocket.onmessage = function (ev) {
            console.log("websockect-server-return-data：" + ev.data);
        }

        // close
        websocket.onclose = function (ev) {
            console.log("close");
        }

---

6. 使用面向對象來優化websocket服務代碼

class WebSocket {
    const HOST = '0.0.0.0';
    const PORT = 9502;

    private $ws = null;

    function __construct()
    {
        $this->ws = new swoole_websocket_server(self::HOST, self::PORT);
        $this->ws->on('open', [$this, 'onOpen']);
        $this->ws->on('message', [$this, 'onMessage']);
        $this->ws->on('close', [$this, 'onClose']);
        $this->ws->start();
    }

    // 監聽websocket鏈接事件
    function onOpen($server, $request) {
        echo "server: handshake success with fd{$request->fd}\n";
    }

    // 監聽websocket消息接收事件
    function onMessage($server, $frame) {
        echo "receive from {$frame->fd}:{$frame->data},opcode:{$frame->opcode},fin:{$frame->finish}\n";
        $server->push($frame->fd, "this is server");
    }

    // 監聽客戶端關閉事件
    function onClose($server, $fd) {
        echo "Client：{$fd} closes\n";
    }
}

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7.swoole中的task小案例

onTask：在task_worker進程內被調用。worker進程可使用swoole_server_task函數向task_worker進程投遞新的任務。當前的Task進程在調用onTask回調函數時會將進程狀態切換爲忙碌，這時將再也不接收新的Task，當onTask函數返回時會將進程狀態切換爲空閒而後繼續接收新的Task。

onFinish：當worker進程投遞的任務在task_worker中完成時，task進程會經過swoole_server->finish()方法將任務處理的結果發送給worker進程。

class Websocket {

    const HOST = '0.0.0.0';
    const PORT = 9502;
    private $ws = null;

    public function __construct()
    {
        $this->ws = new swoole_websocket_server(self::HOST, self::PORT);
        $this->ws->set([
            'worker_num' => 2,
            'task_worker_num' => 2, // 要想使用task必需要指明
        ]);
        $this->ws->on('open', [$this, 'onOpen']);
        $this->ws->on('message', [$this, 'onMessage']);
        $this->ws->on('task', [$this, 'onTask']);
        $this->ws->on('finish', [$this, 'onFinish']);
        $this->ws->on('close', [$this, 'onClose']);
        $this->ws->start();
    }

    public function onOpen($server, $request)
    {
        echo "server：handshake success with fd：{$request->fd}\n";
    }

    public function onMessage($server, $frame)
    {
        echo "receive from {$frame->fd}:{$frame->data}\n";

        // 須要投遞的任務數據
        $data = [
            'fd' => $frame->fd,
            'msg' => 'task',
        ];
        $server->task($data);

        $server->push($frame->fd, 'this is server');
    }

    // 處理投遞的任務方法，非阻塞
    public function onTask($server, $task_id, $worker_id, $data)
    {
        print_r($data);
        // 模擬大量數據的操做
        sleep(10);
        return "task_finish";
    }
    
    // 投遞任務處理完畢調用的方法
    public function onFinish($server, $task_id, $data)
    {
        echo "task_id:{$task_id}\n";
        echo "task finish success:{$data}\n";
    }
    
    public function onClose($server, $fd)
    {
        echo "Client：close";
    }
}