How can I get Request object inside a class in Symfony 2?

Question

I have a class in Symfony that implements an interface. I need to have $request to have POST params. This is my function:

class WebserviceUserProvider implements UserProviderInterface
{
    public function loadUserByUsername($username)
    {
        $salt = "";
        $roles = "";
        // make a call to your webservice here

        .....
    }
...
}

I can't do this:

public function loadUserByUsername($username, Request $request)

because i need to implement the interface, and i get this error:

FatalErrorException: Compile Error: Declaration of Actas\Gestion\UserBundle\Security\User\WebserviceUserProvider::loadUserByUsername() must be compatible with Symfony\Component\Security\Core\User\UserProviderInterface::loadUserByUsername($username)

How can i get the request params? This class is called from login, and i need the password sent by it to use a WebService to authenticate the user.

Thank you very much in advance!

This is my services.xml in the Bundle:

# src/Actas/Gestion/UserBundle/Resources/config/services.yml
parameters:
    webservice_user_provider.class: Actas\Gestion\UserBundle\Security\User\WebserviceUserProvider

services:
    webservice_user_provider:
        class: "%webservice_user_provider.class%"
        scope: container
        calls:
                - [setServiceContainer , ["@service_container"]]

Answer 1

In addition to Czechnology's answer, you could also inject the request using a setter method. In services.yml add:

my_service:
    class: Acme\DemoBundle\Service\WebserviceUserProvider
    scope: request
    calls:
        - [setRequest , ["@request"]]

Then declare your class like this:

use Symfony\Component\HttpFoundation\Request;

class WebserviceUserProvider implements UserProviderInterface {
    private $request;
    public function setRequest( Request $request ) {

        $this->request = $request;
    }
    // ...
}

If you have scope widening issues, you could also try injecting the service container and getting the requesting from it. In services declare your service like this:

my_service:
class: Acme\DemoBundle\Service\WebserviceUserProvider
calls:
    - [setRequest , ["@service_container"]]

Now just use the container to get the request:

use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\HttpFoundation\Request;

class WebserviceUserProvider implements UserProviderInterface {
    private $request;
    public function setRequest( ContainerInterface $container ) {

        $this->request = $container->get('request');
    }
    // ...
}

Answer 2

use Symfony\Component\HttpFoundation\RequestStack;

class NewService
{

    protected $request;

    public function setRequest(RequestStack $request_stack)
    {
        $this->request = $request_stack->getCurrentRequest();
    }

}

In Config file

services:

    new.service:
        class: Acme\DemoBundle\NewService
        calls:
            - [setRequest, [@request_stack]]

Reference : http://symfony.com/blog/new-in-symfony-2-4-the-request-stack

Answer 3

How do you load the service? You can inject various stuff in the service:

my_service:
    class:      Acme\DemoBundle\Service\WebserviceUserProvider
    arguments:  [@request]
    scope:      request

and use it in the constructor

use Symfony\Component\HttpFoundation\Request;

class WebserviceUserProvider implements UserProviderInterface {
    private $request;
    public function __construct(Request $request) {
        $this->request = $request;
    }
    // ...
}

Answer 4

I had a similar problem. May be it helps this solution. You can inject the @service_container to the service. Then you can check if the scope 'request' is active and get then the request. This is a service for creating a global variable for accesing the language variables from twig.

/**
* Servicio para acceder a los datos del idioma actual de forma global.
*
* @author jaime
*
*/
class IdiomaService {

    private $idioma;

    /**
     * Constructor de la clase.
     */
    public function __construct(Container $container, EntityManager $manager, SecurityContext $context){ //, $request ) {
        if ($container->isScopeActive('request')) {
            $_locale = $container->get('request')->getLocale();
        }else{
            $_locale = 'es';
        }
        $this->idioma = $manager->getRepository ( 'BackBundle:Idioma' )->findOneByCodigo ( $_locale);
    }

    public function getIdioma() {
        return $this->idioma;
    }
}