我想在响应 JSON 中添加 API 响应所需的时间。目前正在使用 Lumen 框架开发 API。

如果有人可以指导最好的方法。不确定我是否必须使用框架提供的任何 Hook，或者只是在路由文件中计算它们。以及如何将其推送到所有 API 响应。

PS:仍在学习 Laravel/Lumen 框架。

谢谢， 坦美

请您参考如下方法:

在您的 public/index.php 文件中，添加一个常量:

<?php 
 
/* 
|-------------------------------------------------------------------------- 
| Create The Application 
|-------------------------------------------------------------------------- 
| 
| First we need to get an application instance. This creates an instance 
| of the application / container and bootstraps the application so it 
| is ready to receive HTTP / Console requests from the environment. 
| 
*/ 
 
// To calculate your app execution time 
define('LUMEN_START', microtime(true)); 
 
$app = require __DIR__.'/../bootstrap/app.php'; 
 
/* 
|-------------------------------------------------------------------------- 
| Run The Application 
|-------------------------------------------------------------------------- 
| 
| Once we have the application, we can handle the incoming request 
| through the kernel, and send the associated response back to 
| the client's browser allowing them to enjoy the creative 
| and wonderful application we have prepared for them. 
| 
*/ 
 
$app->run(); 

下一步是创建一个中间件并启用它，以便我们可以操纵我们的响应。在 app/Http/Middleware 中创建一个名为 MeasureExecutionTime.php 的中间件。

<?php 
 
namespace App\Http\Middleware; 
 
use Closure; 
 
class MeasureExecutionTime 
{ 
    /** 
     * Handle an incoming request. 
     * 
     * @param  \Illuminate\Http\Request $request 
     * @param  \Closure                 $next 
     * 
     * @return mixed 
     */ 
    public function handle($request, Closure $next) 
    { 
        // Get the response 
        $response = $next($request); 
 
        // Calculate execution time 
        $executionTime = microtime() - LUMEN_START; 
 
        // I assume you're using valid json in your responses 
        // Then I manipulate them below 
        $content = json_decode($response->getContent(), true) + [ 
            'execution_time' => $executionTime, 
        ]; 
 
        // Change the content of your response 
        $response->setContent($content); 
 
        // Return the response 
        return $response; 
    } 
} 

要在您的应用程序中启用此中间件，请添加:

$app->middleware([ 
   App\Http\Middleware\MeasureExecutionTime::class 
]); 

在您的 bootstrap/app.php 文件中。所以它会是这样的:

<?php 
 
require_once __DIR__.'/../vendor/autoload.php'; 
 
try { 
    (new Dotenv\Dotenv(__DIR__.'/../'))->load(); 
} catch (Dotenv\Exception\InvalidPathException $e) { 
    // n00p 
} 
 
/* 
|-------------------------------------------------------------------------- 
| Create The Application 
|-------------------------------------------------------------------------- 
| 
| Here we will load the environment and create the application instance 
| that serves as the central piece of this framework. We'll use this 
| application as an "IoC" container and router for this framework. 
| 
*/ 
 
$app = new Laravel\Lumen\Application( 
    realpath(__DIR__.'/../') 
); 
 
// $app->withFacades(); 
 
// $app->withEloquent(); 
 
/* 
|-------------------------------------------------------------------------- 
| Register Container Bindings 
|-------------------------------------------------------------------------- 
| 
| Now we will register a few bindings in the service container. We will 
| register the exception handler and the console kernel. You may add 
| your own bindings here if you like or you can make another file. 
| 
*/ 
 
$app->singleton( 
    Illuminate\Contracts\Debug\ExceptionHandler::class, 
    App\Exceptions\Handler::class 
); 
 
$app->singleton( 
    Illuminate\Contracts\Console\Kernel::class, 
    App\Console\Kernel::class 
); 
 
/* 
|-------------------------------------------------------------------------- 
| Register Middleware 
|-------------------------------------------------------------------------- 
| 
| Next, we will register the middleware with the application. These can 
| be global middleware that run before and after each request into a 
| route or middleware that'll be assigned to some specific routes. 
| 
*/ 
 
$app->middleware([ 
   App\Http\Middleware\MeasureExecutionTime::class 
]); 
 
// $app->middleware([ 
//    App\Http\Middleware\ExampleMiddleware::class 
// ]); 
 
// $app->routeMiddleware([ 
//     'auth' => App\Http\Middleware\Authenticate::class, 
// ]); 
 
/* 
|-------------------------------------------------------------------------- 
| Register Service Providers 
|-------------------------------------------------------------------------- 
| 
| Here we will register all of the application's service providers which 
| are used to bind services into the container. Service providers are 
| totally optional, so you are not required to uncomment this line. 
| 
*/ 
 
// $app->register(App\Providers\AppServiceProvider::class); 
// $app->register(App\Providers\AuthServiceProvider::class); 
// $app->register(App\Providers\EventServiceProvider::class); 
 
/* 
|-------------------------------------------------------------------------- 
| Load The Application Routes 
|-------------------------------------------------------------------------- 
| 
| Next we will include the routes file so that they can all be added to 
| the application. This will provide all of the URLs the application 
| can respond to, as well as the controllers that may handle them. 
| 
*/ 
 
$app->group(['namespace' => 'App\Http\Controllers'], function ($app) { 
    require __DIR__.'/../app/Http/routes.php'; 
}); 
 
return $app; 

Note If there are another middlewares in your application, you may add MeasureExecutionTime middleware at the END of any other middlewares.

为了进一步研究，我为您提供了文档链接:

1. Middleware .
2. Responses .

<小时 />

更新

如果您不想将耗时添加到响应正文中，可以将其添加到 header 中:

<?php 
 
namespace App\Http\Middleware; 
 
use Closure; 
 
class MeasureExecutionTime 
{ 
    /** 
     * Handle an incoming request. 
     * 
     * @param  \Illuminate\Http\Request  $request 
     * @param  \Closure  $next 
     * @return mixed 
     */ 
    public function handle($request, Closure $next) 
    { 
        $response = $next($request); 
 
        $response->headers->set('X-Elapsed-Time', microtime(true) - LUMEN_START); 
 
        return $response; 
    } 
}