Json Exception Response

A Laravel/Lumen package for structing API exception response in JSON followed http://jsonapi.org/.

Install

Via Composer

$ composer require lalu/jer

Laravel

Once this has finished, you will need to add the service provider to the providers array in your config/app.php as follows:

'providers' => [
    // ...
    LaLu\JER\JERServiceProvider::class,
]

If you want to use alias, also in the app.php config file, under the aliases array, you may want to add facades as follows:

'aliases' => [
    // ...
    'JER' => LaLu\JER\Facades\JERFacade::class
]

Then, publish the localization by running:

php artisan vendor:publish

Lumen

Open bootstrap/app.php and add this line:

$app->register(LaLu\JER\JERServiceProvider::class);

If you want to use alias, also in your bootstrap/app.php, make sure you have uncommented

$app->withFacades();

Then, add this line:

class_alias(LaLu\JER\Facades\JERFacade::class, 'JER');

For localization, you have to create messages.php under resources/lang/vendor/lalu-jer/en (default is en - English). All built-in message ids are in here

Usage

In the app\Exceptions\Handler.php, let the class extends LaLu\JER\ExceptionHandler.

use LaLu\JER\ExceptionHandler;

class Handler extends ExceptionHandler
{
    // ...
}

Then all of Exceptions will handle by this package.

You can also use abort or throw new \Exception\You\Want() to raise and response exception.

Advanced

Add meta to response json? It's not a big deal.

use LaLu\JER\ExceptionHandler;

class Handler extends ExceptionHandler
{
    public $meta = [
        'meta_field_1' => 'meta_value_1',
        // ...
    ];

    // ...
}

Or

use LaLu\JER\ExceptionHandler;

class Handler extends ExceptionHandler
{
    public function beforeRender($request, Exception $exception)
    {
        $this->meta = [
            'meta_field_1' => 'meta_value_1',
            // ...
        ];
    }

    // ...
}

With beforeRender which will be raised before the render method, you can do more logics to set meta, headers and so on.

If you want to custom the response of some Exception classes, just override the getExceptionError.

use LaLu\JER\ExceptionHandler;
use LaLu\JER\Error;

class Handler extends ExceptionHandler
{
    // ...

    /**
     * Get exception jsonapi data.
     *
     * @param \Exception $exception
     *
     * @return array
     */
    protected function getExceptionError(Exception $exception)
    {
        if ($exception instanceof \Exception\You\Want) {
            // status must be an integer and is a HTTP error status code
            $status = 400;
            // headers must be an array of key value
            $headers = [];
            $content = [
                'title' => 'Your exception custom title',
                'detail' => 'Your exception custom detail',
            ];
            // error can be an instance/array items of \LaLu\JER\Error or array of error array
            $error = new Error(['version' => $this->jsonapiVersion], $content);
            $error->status = '400';
            // ...
            return [$status, $error, $headers];
        } elseif ($exception instanceof \Other\Exception) {
            return [400, [['title' => 'Your request is bad request']], []];
        } else {
            return parent::getExceptionError($exception);
        }
    }
}

If you want to custom error json response, feel free to use this function:

$option = [
    'version' => '1.0', // JSONAPI specification version
    'status' => 400, // HTTP status code
    'headers' => ['My-Custom-Header' => 'Value'], // Response headers,
    'exception' => new \Exception(), // Exception
];
$attributes = [
    'meta' => [
        'apiVersion' => '1.0.0',
        'author' => 'thanh-taro',
    ],
    'errors' => new Error(['version' => '1.0'], ['title' => 'My custom error', 'detail' => 'This is an error response']), // Error content
];
$response = \JER::getResponse($option, $attributes);

Note that JER is an alias, if you didn't config for alias, you may use

(new \LaLu\JER\JsonExceptionResponse())->getResponse($option, $attributes);

License

The MIT License (MIT).