Day 9 - Laravel 8.0的Error Handling

不管是预期或非预期，程序往往会发生一些错误，我们不希望使用者Call API或浏览网页的时候发生错误直接跳出像下面一样的错误讯息

如果太过详细的错误讯息可能会造成资安的危机，所以我们需要先把.env中APP_DEBUG的值改为False，如此一来我们看到的错误讯息会变成这样

接下来我们需要把这些错误讯息做处理，修改app\Exceptions\Handler

use Laravel本身就拥有的Exception
$this->renderable()内部撰写闭包传入Exception和Request
写一个新的handleException function专门做Response的处理，当中会从传入的exception判断是属於哪种错误，判断完後传回自订的Response message

<?php

namespace App\Exceptions;

use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use Exception;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;

class Handler extends ExceptionHandler
{
    /**
     * A list of the exception types that are not reported.
     *
     * @var array
     */
    protected $dontReport = [
        //
    ];

    /**
     * A list of the inputs that are never flashed for validation exceptions.
     *
     * @var array
     */
    protected $dontFlash = [
        'current_password',
        'password',
        'password_confirmation',
    ];

    /**
     * Register the exception handling callbacks for the application.
     *
     * @return void
     */
    public function register()
    {
        $this->renderable(function(Exception $e, $request) {
            return $this->handleException($request, $e);
        });
    }

    /**
     * Handle response from exception.
     *
     * @param Request $request
     * @param \Exception $exception
     * @return JsonResponse|null
     */
    private function handleException($request, Exception $exception)
    {
        switch (true) {
            case $exception instanceof NotFoundHttpException:
                return response()->json([
                    'message' => 'Http not found.'
                ], 404);
            case $exception instanceof MethodNotAllowedHttpException:
                return response()->json([
                    'message' => 'Method not allowed.'
                ], 405);
            case $exception instanceof UnauthorizedHttpException:
                return response()->json([
                    'message' => 'Unauthorized.'
                ], 401);
        }

        return null;
    }
}

改完後，再来试试我们的API