Laravel Json Exception Handler

Adds methods to your App\Exceptions\Handler to treat json responses. It is most useful if you are building APIs!

Requirements

• Laravel Framework >= 5.4
• php >= 7.0

JsonAPI

Using JsonAPI standard to responses!

Features

Default error response:

{
  "errors": [
    {
      "status": "404",
      "code": "13",
      "title": "model_not_found_exception",
      "detail": "User not found",
      "source": {
        "pointer": "data/id"
      }
    }
  ]
}

To Illuminate\Validation\ValidationException:

{
  "errors": [
    {
      "status": "422",
      "code": "1411",
      "title": "Required validation failed on field name",
      "detail": "The name field is required.",
      "source": {
        "pointer": "name"
      }
    },
    {
      "status": "422",
      "code": "1421",
      "title": "Email validation failed on field email",
      "detail": "The email must be a valid email address.",
      "source": {
        "pointer": "email"
      }
    }
  ]
}

Treated Exceptions

• Illuminate\Auth\Access\AuthorizationException
• Illuminate\Auth\AuthenticationException
• Illuminate\Database\Eloquent\ModelNotFoundException
• Illuminate\Validation\ValidationException
• Laravel\Passport\Exceptions\MissingScopeException
• League\OAuth2\Server\Exception\OAuthServerException
• Symfony\Component\HttpKernel\Exception\NotFoundHttpException
• Symfony\Component\HttpKernel\Exception\BadRequestHttpException

Installing and configuring

Install the package

$ composer require sfelix-martins/json-exception-handler

If you are not using Laravel 5.5 version add the JsonHandlerServiceProvider to your config/app.php providers array:

    'providers' => [
        ...
        SMartins\Exceptions\JsonHandlerServiceProvider::class,
    ],

Publish the config to set your own exception codes

$ php artisan vendor:publish --provider="SMartins\JsonHandler\JsonHandlerServiceProvider"

Set your exception codes on config/json-exception-handler.php on codes array.

You can add more fields and codes to validation_fields array.

You can add too your models on lang packages to return the Not Found response translated correctly.

In resources/lang/vendor/exception/lang/$locale in exceptions file you can set on models array. Example:

    'models' => [
        'User' => 'Usuário',
        'Article' => 'Artigo',
    ]

Using

Use the trait on your App\Exception\Handler and add method jsonResponse() passing the $exception if $request expects a json response on render()method

use SMartins\Exceptions\JsonHandler;

class Handler extends ExceptionHandler
{
    use JsonHandler;

    // ...

    public function render($request, Exception $exception)
    {   
        if ($request->expectsJson()) {
            return $this->jsonResponse($exception);
        }

        return parent::render($request, $exception);
    }
    
    // ...

Use sample

class UserController extends Controller
{
    // ...

    public function store(Request $request)
    {
        // Validation
        $request->validate($this->rules);

        // or
        $this->validate($request, $this->rules);

        //and or
        Validator::make($request->all(), $this->rules)->validate();

        if (condition()) {
            // Generate response with http code and message
            abort(403, 'Action forbidden!');
        }

        if (anotherCondition()) {
            // Generate response with message and code
            throw new TokenMismatchException("Error Processing Request", 10);
        }
    }

    public function show($id)
    {
        // If not found the default response is called
        $user = User::findOrFail($id);
        
        // Gate define on AuthServiceProvider
        // Generate an AuthorizationException if fail
        $this->authorize('users.view', $user->id);
    }

Extending

You can too create your own handler to any Exception. E.g.:

• Create a Handler class that extends of AbstractHandler:

namespace App\Exceptions;

use GuzzleHttp\Exception\ClientException;
use SMartins\Exceptions\Handlers\AbstractHandler;

class GuzzleClientHandler extends AbstractHandler
{
    /**
     * Create instance using the Exception to be handled.
     *
     * @param \GuzzleHttp\Exception\ClientException $e
     */
    public function __construct(ClientException $e)
    {
        parent::__construct($e);
    }
}

• You must implements the method handle() from AbstractHandler class. The method must return an instance of Error or ErrorCollection:

namespace App\Exceptions;

use SMartins\Exceptions\JsonAPI\Error;
use SMartins\Exceptions\JsonAPI\Source;
use GuzzleHttp\Exception\ClientException;
use SMartins\Exceptions\Handlers\AbstractHandler;

class GuzzleClientHandler extends AbstractHandler
{
    // ...

    public function handle()
    {
        return (new Error)->setStatus($this->getStatusCode())
            ->setCode($this->getCode())
            ->setSource((new Source())->setPointer($this->getDefaultPointer()))
            ->setTitle($this->getDefaultTitle())
            ->setDetail($this->exception->getMessage());
    }

    public function getCode()
    {
        // You can add a new type of code on `config/json-exception-handlers.php`
        return config('json-exception-handler.codes.client.default');
    }
}

namespace App\Exceptions;

use SMartins\Exceptions\JsonAPI\Error;
use SMartins\Exceptions\JsonAPI\Source;
use SMartins\Exceptions\JsonAPI\ErrorCollection;
use SMartins\Exceptions\Handlers\AbstractHandler;

class MyCustomizedHandler extends AbstractHandler
{
    public function __construct(MyCustomizedException $e)
    {
        parent::__construct($e);
    }

    public function handle()
    {
        $errors = (new ErrorCollection)->setStatusCode(400);

        $exceptions = $this->exception->getExceptions();

        foreach ($exceptions as $exception) {
            $error = (new Error)->setStatus(422)
                ->setSource((new Source())->setPointer($this->getDefaultPointer()))
                ->setTitle($this->getDefaultTitle())
                ->setDetail($exception->getMessage());

            $errors->push($error);
        }

        return $errors;
    }
}

• Now just registry your customized handler on App\Exception\Handler file on attribute exceptionHandlers. E.g:

namespace App\Exceptions;

use Exception;
use GuzzleHttp\Exception\ClientException;
use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
use SMartins\Exceptions\JsonHandler;

class Handler extends ExceptionHandler
{
    use JsonHandler;

    protected $exceptionHandlers = [
        // Set on key the exception and on value the handler.
        ClientException::class => GuzzleClientHandler::class,
    ];

Response References:

• http://jsonapi.org/format/#errors