快速网站开发框架51链

前提

我希望通过中间件记录用户的请求数据、我的返回数据，如果出现异常捕获异常。

代码

路由文件：追加中间件api-logging，用于记录日志

Route::prefix('api')->middleware(['api', 'api-logging'])->group(function () {...路由内容
});

namespace App\Http;
class Kernel extends HttpKernel
{...其他内容protected $routeMiddleware = [... 其他中间件'api-logging' => \App\Http\Middleware\ApiLoggingMiddleware::class,];
}

重点：中间件的编写

<?phpnamespace App\Http\Middleware;use Closure;
use Illuminate\Http\Request;
use App\Models\GameThirdPartyCallback;class ApiLoggingMiddleware
{public function handle(Request $request, Closure $next){$requestHeaders = $request->header();$requestData = $request->all();$source = $request->header('referer') ?? $request->ip();try {// 执行请求并获取响应$response = $next($request);$responseStatus = $response->status();$responseContent = $response->getContent();} catch (\Exception $exception) {// 记录异常信息GameThirdPartyCallback::create(['request_headers' => json_encode($requestHeaders),'callback_data' => json_encode($requestData),'response_status' => 500, // 或其他适当的错误状态码'response_content' => 'An error occurred: ' . $exception->getMessage(),'sources' => $source]);// 重新抛出异常，交由Laravel处理throw $exception;}// 记录正常的响应数据GameThirdPartyCallback::create(['request_headers' => json_encode($requestHeaders),'callback_data' => json_encode($requestData),'response_status' => $responseStatus,'response_content' => $responseContent,'sources' => $source]);return $response;}
}

我希望在，下面这段可以当 $next($request); 出现异常被捕获

try {// 执行请求并获取响应$response = $next($request);} catch (\Exception $exception) {// 重新抛出异常，交由Laravel处理throw $exception;}

然而并不行，如果控制器中出现了异常，会被laravel的全局异常处理机制捕获，$response = $next($request); 会返回捕获后的异常处理的类，也就是异常已经被处理掉了

最终处理方案

在全局异常处理的时候，将异常内容插入到request中，然后在中间件去获取这个自定义的属性

1. 全局处理文件中，加入下面这段代码

namespace App\Exceptions;use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use Throwable;class Handler extends ExceptionHandler
{/*** Render an exception into an HTTP response.** @param  \Illuminate\Http\Request  $request* @param  \Throwable  $exception* @return \Symfony\Component\HttpFoundation\Response*/public function render($request, Throwable $exception){// 这里这段的内容是为了让异常内容可以被中间件获取// 因为控制器的异常会被laravel全局异常直接捕获，导致中间件获取的内容是异常页面$request->attributes->set('exception_message', $exception->getMessage());return parent::render($request, $exception);}
}

然后中间件中获取exception_message

<?phpnamespace App\Http\Middleware;use Closure;
use Illuminate\Http\Request;
use App\Models\GameThirdPartyCallback;class ApiLoggingMiddleware
{public function handle(Request $request, Closure $next){$requestHeaders = $request->header();$requestData = $request->all();$source = $request->header('referer') ?? $request->ip();$response = $next($request);  // 如果这里产生了异常，不会在这里try catch。而是直接返回了response的错误内容$responseStatus = $response->status();if ($responseStatus >= 400 && $responseStatus < 600) {GameThirdPartyCallback::create(['request_headers' => json_encode($requestHeaders),'callback_data' => json_encode($requestData),'response_status' => $responseStatus,'response_content' => $request->attributes->get("exception_message"),'sources' => $source]);} else {...}return $response;}}