PHP异步编程: 基于 PHP 实(chao)现(xi) NODEJS web框架KOA

说明

偶然间在 GITHUB 上看到有赞官方仓库的 手把手教你实现co与Koa 。由于此前用过 KOA ，对于 KOA 的洋葱模型叹为观止。不由得心血来潮的看完了整个文档，接着 CTRL+C、 CTRL+V 让代码跑了起来。 文档中是基于 swoole 扩展进行开发，而 swoole 对 WINDOWS 并不友好，向来习惯在 WINDOWS 下开发的我一鼓作气，将Workerman 改写并兼容了此项目。

体验

PHPKoa Demo 是使用 PHPKoa 开发 HTTP SERVER 的一个简单示例！

安装

composer require naka1205/phpkoa

Hello World

<?phprequire __DIR__ . '/vendor/autoload.php';use Naka507\Koa\Application;use Naka507\Koa\Context;$app = new Application();$app->υse(function(Context $ctx) { $ctx->status = 200; $ctx->body = "<h1>Hello World</h1>";});$app->listen(3000);

Error

<?phprequire __DIR__ . '/vendor/autoload.php';use Naka507\Koa\Application;use Naka507\Koa\Context;use Naka507\Koa\Error;use Naka507\Koa\Timeout;use Naka507\Koa\Router;use Naka507\Koa\NotFound;$app = new Application();$app->υse(new Error());$app->υse(new NotFound());$app->υse(new Timeout(3)); //设置3秒超时$router = new Router();//正常访问$router->get('/hello', function(Context $ctx, $next) { $ctx->status = 200; $ctx->body = "<h1>Hello World</h1>";});//访问超时$router->get('/timeout', function(Context $ctx, $next) { yield async_sleep(5);});//访问出错$router->get('/error', function(Context $ctx, $next) { $ctx->thrοw(500, "Internal Error"); yield;});$app->υse($router->routes());$app->listen(3000);

Router

<?phprequire __DIR__ . '/vendor/autoload.php';define('DS', DIRECTORY_SEPARATOR);use Naka507\Koa\Application;use Naka507\Koa\Context;use Naka507\Koa\Error;use Naka507\Koa\Timeout;use Naka507\Koa\Router;$app = new Application();$app->υse(new Error());$app->υse(new Timeout(5));$router = new Router();$router->get('/demo1', function(Context $ctx, $next) { $ctx->body = "demo1";});$router->get('/demo2', function(Context $ctx, $next) { $ctx->body = "demo2";});$router->get('/demo3/(\d+)', function(Context $ctx, $next, $vars) { $ctx->status = 200; $ctx->body = "demo3={$vars[0]}";});$router->get('/demo4', function(Context $ctx, $next) { $ctx->redirect("/demo2");});//RESTful API$router->post('/demo3/(\d+)', function(Context $ctx, $next, $vars) { //设置 session $ctx->setSession('demo3',$vars[0]); //设置 cookie $ctx->setCookie('demo3',$vars[0]); $ctx->status = 200; $ctx->body = "post:demo3={$vars[0]}";});$router->put('/demo3/(\d+)', function(Context $ctx, $next, $vars) { //获取单个 cookie $cookie_demo3 = $ctx->getCookie('demo3'); //或者 $cookies = $ctx->cookies['demo3']; //获取单个 session $session_demo3 = $ctx->getSession('demo3'); //或者 $session = $ctx->session['demo3']; $ctx->status = 200; $ctx->body = "put:demo3={$vars[0]}";});$router->delete('/demo3/(\d+)', function(Context $ctx, $next, $vars) { //清除所有 cookie $ctx->clearCookie(); //清除所有 session $ctx->clearSession(); $ctx->status = 200; $ctx->body = "delete:demo3={$vars[0]}";});//文件上传$router->post('/files/(\d+)', function(Context $ctx, $next, $vars) { $upload_path = __DIR__ . DS . "uploads" . DS; if ( !is_dir($upload_path) ) { mkdir ($upload_path , 0777, true); } $files = []; foreach ( $ctx->request->files as $key => $value) { if ( !$value['file_name'] || !$value['file_data'] ) { continue; } $file_path = $upload_path . $value['file_name']; file_put_contents($file_path, $value['file_data']); $value['file_path'] = $file_path; $files[] = $value; } $ctx->status = 200; $ctx->body = json_encode($files);});$app->υse($router->routes());$app->listen(3000);<?php//此处已省略 ... //使用第三方 HTTP 客户端类库，方便测试use GuzzleHttp\Client;$router = new Router();//路由分组 //;mount('/curl', function() use ($router) { $client = new Client(); $router->get('/get', function( Context $ctx, $next ) use ($client) { $r = (yield $client->request('GET', '')); $ctx->status = $r->getStatusCode(); $ctx->body = $r->getBody(); }); $router->get('/post', function(Context $ctx, $next ) use ($client){ $r = (yield $client->request('POST', '')); $ctx->status = $r->getStatusCode(); $ctx->body = $r->getBody(); }); $router->get('/put', function( Context $ctx, $next ) use ($client){ $r = (yield $client->request('PUT', '')); $ctx->status = $r->getStatusCode(); $ctx->body = $r->getBody(); }); $router->get('/delete', function( Context $ctx, $next ) use ($client){ $r = (yield $client->request('DELETE', '')); $ctx->status = $r->getStatusCode(); $ctx->body = $r->getBody(); });});//;get('/files', function(Context $ctx, $next ) { $client = new Client(); $r = ( yield $client->request('POST', '', [ 'multipart' => [ [ 'name' => 'file_name', 'contents' => fopen( __DIR__ . '/file.txt', 'r') ], [ 'name' => 'other_file', 'contents' => 'hello', 'filename' => 'filename.txt', 'headers' => [ 'X-Foo' => 'this is an extra header to include' ] ] ] ])); $ctx->status = $r->getStatusCode(); $ctx->body = $r->getBody();});// $router->get('/curl/(\w+)', function(Context $ctx, $next, $vars) {// $method = strtoupper($vars[0]);// $client = new Client();// $r = (yield $client->request($method, ''));// $ctx->status = $r->getStatusCode();// $ctx->body = $r->getBody();// });$app->υse($router->routes());$app->listen(5000);

Template

<body> <h1>{title}</h1> <p>{time}</p></body><?phprequire __DIR__ . '/vendor/autoload.php';use Naka507\Koa\Application;use Naka507\Koa\Context;use Naka507\Koa\Error;use Naka507\Koa\Timeout;use Naka507\Koa\Router;$app = new Application();$app->υse(new Error());$app->υse(new Timeout(5));$router = new Router();$router->get('/hello', function(Context $ctx) { $ctx->status = 200; $ctx->state["title"] = "HELLO WORLD"; $ctx->state["time"] = date("Y-m-d H:i:s", time());; yield $ctx->render(__DIR__ . "/hello.html");});$app->υse($router->routes());$app->listen(3000);<body> <p>{title}</p> <table border=1> <tr><td>Name</td><td>Age</td></tr> <!-- BEGIN INFO --> <tr> <td> {name} </td> <td> {age} </td> </tr> <!-- END INFO --> </table></body><?php//此处已省略 ... //一维数组$router->get('/info', function(Context $ctx) { $info = array("name" => "小明", "age" => 15); $ctx->status = 200; $ctx->state["title"] = "这是一个学生信息"; $ctx->state["info"] = $info; yield $ctx->render(__DIR__ . "/info.html");});<body> <p>{title}</p> <table border=1> <tr><td>Name</td><td>Age</td></tr> <!-- BEGIN TABLE --> <tr> <td> {name} </td> <td> {age} </td> </tr> <!-- END TABLE --> </table></body><?php//此处已省略 ... //二维数组$router->get('/table', function(Context $ctx) { $table = array( array("name" => "小明", "age" => 15), array("name" => "小花", "age" => 13), array("name" => "小刚", "age" => 17) ); $ctx->status = 200; $ctx->state["title"] = "这是一个学生名单"; $ctx->state["table"] = $table; yield $ctx->render(__DIR__ . "/table.html");});

静态文件处理 中间件 PHPKoa Static

<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>PHPkoa Static</title> <link rel="stylesheet" href="/css/default.css"></head><body> <img src="/images/20264902.jpg" /></body></html><?phprequire __DIR__ . '/vendor/autoload.php';defined('DS') or define('DS', DIRECTORY_SEPARATOR);use Naka507\Koa\Application;use Naka507\Koa\Context;use Naka507\Koa\Error;use Naka507\Koa\Timeout;use Naka507\Koa\NotFound;use Naka507\Koa\Router;//静态文件处理 中间件use Naka507\Koa\StaticFiles; $app = new Application();$app->υse(new Error());$app->υse(new Timeout(5));$app->υse(new NotFound()); $app->υse(new StaticFiles(__DIR__ . DS . "static" )); $router = new Router();$router->get('/index', function(Context $ctx, $next) { $ctx->status = 200; yield $ctx->render(__DIR__ . "/index.html");});$app->υse($router->routes());$app->listen(3000);