Slim 3 PHP - can't access values in settings.php from middleware.php

Question

I have a midleware that checks for a valid signature on a JWT token for GET requests to private routes. In it, I need to supply my JWT secret which is stored in settings.php at ['settings']['jwt']['secret']. I tried accessing this value using $this->settings->jwt->secret and get the error:

Using $this when not in object context

I switched to use $app->settings->jwt->secret and get the error

Uncaught InvalidArgumentException: Secret must be either a string or an array of "kid" => "secret" pairs

middleware.php

$app->add(new \Tuupola\Middleware\JwtAuthentication([
    "path" => "/api", /* or ["/api", "/admin"] */
    "attribute" => "decoded_token_data",
    "secret" => $this->settings->jwt->secret,
    "algorithm" => ["HS256"],
    "error" => function ($response, $arguments) {
        $data["status"] = "error";
        $data["message"] = $arguments["message"];
        return $response
            ->withHeader("Content-Type", "application/json")
            ->write(json_encode($data, JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT));
    }, ]));

settings.php

return [
    'settings' => [
        'displayErrorDetails' => true, // set to false in production
        'addContentLengthHeader' => false, // Allow the web server to send the content-length header

        // Renderer settings
        'renderer' => [
            'template_path' => __DIR__ . '/../templates/',
        ],

        // Monolog settings
        'logger' => [
            'name' => 'slim-app',
            'path' => isset($_ENV['docker']) ? 'php://stdout' : __DIR__ . '/../logs/app.log',
            'level' => \Monolog\Logger::DEBUG,
        ],
        // database connection details
        "db" => [
            "host" => "127.0.0.1",
            "dbname" => "sity",
            "user" => "root",
            "pass" => "",
        ],

        // jwt settings
        "jwt" => [
            'secret' => 'jwtsecret',
        ],
    ],
];

What is the correct way to access that value (or anything in the settings object for that matter)?

score 1 · Accepted Answer · edited Jun 20 '20 at 09:12

1

According to the docs (http://www.slimframework.com/docs/v3/objects/application.html):

There are also a number of settings that are used by Slim. These are stored in the settings configuration key. You can also add your application-specific settings.

As the settings are stored in the DI container so you can access them via the settings key in container factories.

So, before you add the middleware, go ahead and grab the settings since, as the error indicates, you are not inside an object context.

$container = $app->getContainer();
$jwtSettings = $container->get('settings')['jwt'];

Then inside $app->add() you should be able to get the token like:

"secret" => $jwtSettings['secret'],

edited Jun 20 '20 at 09:12

Community

1
1

answered Feb 07 '19 at 17:24

Jeremy Harris

24,318
13
79
133

Perfect - I knew I was missing something like that but am still a little foggy on the container concept. This will allow me to move forward and figure it out along the way. Thanks!! – Daveh0 Feb 07 '19 at 17:29
Lookup "dependency injection". It is a powerful concept for decoupling dependencies and allows code to be written that is more flexible. – Jeremy Harris Feb 07 '19 at 17:31

score -1 · Answer 2 · answered Feb 07 '19 at 17:19

-1

something like this should work:

$modulesSettings = $this->get('settings')['jwt']['secret'];

answered Feb 07 '19 at 17:19

Matt Goodis

393
1
3
11

it gives the error: "Using $this when not in object context". Changing `$this` to `$app` gives the error: "Too few arguments to function Slim\App::get()" – Daveh0 Feb 07 '19 at 17:24

Slim 3 PHP - can't access values in settings.php from middleware.php

2 Answers2