think-swoole开发文档

think-swoole是基于ThinkPHP框架和Swoole扩展开发的一款高性能Web框架，它能够提供更快的响应速度和更高的并发能力。下面是think-swoole的基本使用文档。

1. 安装

在使用think-swoole之前，需要先安装ThinkPHP和Swoole扩展。可以通过composer安装：

composer require topthink/think-swoole

2. 配置

在config目录下新建swoole.php配置文件，配置swoole服务器参数：

return [
    //swoole服务器参数
    'server' => [
        'host' => '0.0.0.0', //监听地址
        'port' => 9501, //监听端口
        'worker_num' => 4, //worker进程数
    ],
    //swoole服务器事件回调
    'callbacks' => [
        'onStart' => [App\Server\Server::class, 'onStart'],
        'onWorkerStart' => [App\Server\Server::class, 'onWorkerStart'],
        'onRequest' => [App\Server\Server::class, 'onRequest'],
        'onTask' => [App\Server\Server::class, 'onTask'],
        'onFinish' => [App\Server\Server::class, 'onFinish'],
        'onClose' => [App\Server\Server::class, 'onClose'],
    ],
];

3. 创建服务器

在app目录下新建Server目录，创建Server.php文件，实现onStart、onWorkerStart、onRequest、onTask、onFinish、onClose等事件回调方法。

namespace App\Server;

use Swoole\Http\Request;
use Swoole\Http\Response;
use Swoole\Server;

class Server
{
    public static function onStart(Server $server)
    {
        echo "Swoole http server is started at http://{$server->host}:{$server->port}\n";
    }

    public static function onWorkerStart(Server $server, int $workerId)
    {
        //worker进程启动时加载ThinkPHP框架
        defined('APP_PATH') or define('APP_PATH', __DIR__ . '/../');
        require __DIR__ . '/../vendor/autoload.php';
    }

    public static function onRequest(Request $request, Response $response)
    {
        //处理请求
        $_SERVER = [];
        if (isset($request->server)) {
            foreach ($request->server as $k => $v) {
                $_SERVER[strtoupper($k)] = $v;
            }
        }
        if (isset($request->header)) {
            foreach ($request->header as $k => $v) {
                $_SERVER[strtoupper($k)] = $v;
            }
        }
        $_GET = [];
        if (isset($request->get)) {
            foreach ($request->get as $k => $v) {
                $_GET[$k] = $v;
            }
        }
        $_POST = [];
        if (isset($request->post)) {
            foreach ($request->post as $k => $v) {
                $_POST[$k] = $v;
            }
        }
        $_FILES = [];
        if (isset($request->files)) {
            foreach ($request->files as $k => $v) {
                $_FILES[$k] = $v;
            }
        }
        ob_start();
        try {
            //执行ThinkPHP应用
            $app = new \think\App;
            $app->run()->send();
        } catch (\Exception $e) {
            //异常处理
            echo $e->getMessage();
        }
        $result = ob_get_contents();
        ob_end_clean();
        //响应结果
        $response->end($result);
    }

    public static function onTask(Server $server, $taskId, $workerId, $data)
    {
        //处理任务
        //...
        return 'task finished';
    }

    public static function onFinish(Server $server, $taskId, $data)
    {
        //处理任务完成后的结果
        echo 'Task finished: ' . $data . PHP_EOL;
    }

    public static function onClose(Server $server, $fd, $reactorId)
    {
        //关闭连接时执行
        echo "client {$fd} closed\n";
    }
}

在public目录下新建index.php文件，创建swoole服务器，并启动：

//定义应用目录
define('APP_PATH', __DIR__ . '/../app/');
// 加载框架基础文件
require __DIR__ . '/../vendor/autoload.php';
// 创建swoole服务器
$http = new Swoole\Http\Server('0.0.0.0', 9501);
$http->set([
    'worker_num' => 4,
]);
// 加载swoole配置和事件回调
$http->on('start', [App\Server\Server::class, 'onStart']);
$http->on('workerStart', [App\Server\Server::class, 'onWorkerStart']);
$http->on('request', [App\Server\Server::class, 'onRequest']);
$http->on('task', [App\Server\Server::class, 'onTask']);
$http->on('finish', [App\Server\Server::class, 'onFinish']);
$http->on('close', [App\Server\Server::class, 'onClose']);
// 启动服务器
$http->start();

4. 访问

启动服务器后，在浏览器中访问http://localhost:9501即可使用think-swoole开发的应用。