How to validate a jwt token programmatically in symfony?

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by dedrick , in category: PHP Frameworks , 6 months ago

How to validate a jwt token programmatically in symfony?

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1 answer

by ryan.murray , 24 days ago

@dedrick 

In Symfony, you can validate a JWT token programmatically using the LexikJWTAuthenticationBundle. Here's an example of how you can validate a JWT token in Symfony:

  1. Install the LexikJWTAuthenticationBundle using Composer:
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composer require "lexik/jwt-authentication-bundle"


  1. Configure the LexikJWTAuthenticationBundle in your Symfony project by adding the following configuration to your config/packages/lexik_jwt_authentication.yaml file:
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lexik_jwt_authentication:
    secret_key: '%kernel.project_dir%/config/jwt/private.pem'
    public_key: '%kernel.project_dir%/config/jwt/public.pem'
    pass_phrase: 'your_secret_passphrase'
    token_ttl: 3600


  1. Create a service that will handle the token validation. For example, you can create a TokenValidator service like this:
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// src/Service/TokenValidator.php

namespace AppService;

use LexikBundleJWTAuthenticationBundleServicesJWTTokenManagerInterface;

class TokenValidator
{
    private $jwtManager;

    public function __construct(JWTTokenManagerInterface $jwtManager)
    {
        $this->jwtManager = $jwtManager;
    }

    public function validateToken(string $token)
    {
        $decodedToken = $this->jwtManager->decode($token);

        // Add your custom validation logic here

        return $decodedToken;
    }
}


  1. Use the TokenValidator service in your controller to validate the JWT token:
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// src/Controller/SomeController.php

namespace AppController;

use AppServiceTokenValidator;
use SymfonyBundleFrameworkBundleControllerAbstractController;
use SymfonyComponentHttpFoundationJsonResponse;

class SomeController extends AbstractController
{
    public function someAction(TokenValidator $tokenValidator)
    {
        $token = // Get the token from the request

        try {
            $decodedToken = $tokenValidator->validateToken($token);
            // Token is valid
            return new JsonResponse($decodedToken);
        } catch (Exception $e) {
            // Token is invalid
            return new JsonResponse(['error' => 'Invalid token'], 401);
        }
    }
}


Now you can call the validateToken method of the TokenValidator service to validate a JWT token programmatically in Symfony.