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<?php
/*
* OAuth2 Client Bundle
* Copyright (c) KnpUniversity <http://knpuniversity.com/>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace KnpU\OAuth2ClientBundle\Client;
use KnpU\OAuth2ClientBundle\Exception\InvalidStateException;
use KnpU\OAuth2ClientBundle\Exception\MissingAuthorizationCodeException;
use League\OAuth2\Client\Provider\AbstractProvider;
use League\OAuth2\Client\Provider\Exception\IdentityProviderException;
use League\OAuth2\Client\Token\AccessToken;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\HttpFoundation\Session\SessionInterface;
class OAuth2Client implements OAuth2ClientInterface
{
public const OAUTH2_SESSION_STATE_KEY = 'knpu.oauth2_client_state';
/** @var AbstractProvider */
private $provider;
/** @var RequestStack */
private $requestStack;
/** @var bool */
private $isStateless = false;
/**
* OAuth2Client constructor.
*/
public function __construct(AbstractProvider $provider, RequestStack $requestStack)
{
$this->provider = $provider;
$this->requestStack = $requestStack;
}
/**
* Call this to avoid using and checking "state".
*/
public function setAsStateless()
{
$this->isStateless = true;
}
/**
* Creates a RedirectResponse that will send the user to the
* OAuth2 server (e.g. send them to Facebook).
*
* @param array $scopes The scopes you want (leave empty to use default)
* @param array $options Extra options to pass to the Provider's getAuthorizationUrl()
* method. For example, <code>scope</code> is a common option.
* Generally, these become query parameters when redirecting.
*
* @return RedirectResponse
*/
public function redirect(array $scopes = [], array $options = [])
{
if (!empty($scopes)) {
$options['scope'] = $scopes;
}
$url = $this->provider->getAuthorizationUrl($options);
// set the state (unless we're stateless)
if (!$this->isStateless()) {
$this->getSession()->set(
self::OAUTH2_SESSION_STATE_KEY,
$this->provider->getState()
);
}
return new RedirectResponse($url);
}
/**
* Call this after the user is redirected back to get the access token.
*
* @param array $options Additional options that should be passed to the getAccessToken() of the underlying provider
*
* @return AccessToken|\League\OAuth2\Client\Token\AccessTokenInterface
*
* @throws InvalidStateException
* @throws MissingAuthorizationCodeException
* @throws IdentityProviderException If token cannot be fetched
*/
public function getAccessToken(array $options = [])
{
if (!$this->isStateless()) {
$expectedState = $this->getSession()->get(self::OAUTH2_SESSION_STATE_KEY);
$actualState = $this->getCurrentRequest()->get('state');
if (!$actualState || ($actualState !== $expectedState)) {
throw new InvalidStateException('Invalid state');
}
}
$code = $this->getCurrentRequest()->get('code');
if (!$code) {
throw new MissingAuthorizationCodeException('No "code" parameter was found (usually this is a query parameter)!');
}
return $this->provider->getAccessToken(
'authorization_code',
array_merge(['code' => $code], $options)
);
}
/**
* Get a new AccessToken from a refresh token.
*
* @param array $options Additional options that should be passed to the getAccessToken() of the underlying provider
*
* @return AccessToken|\League\OAuth2\Client\Token\AccessTokenInterface
*
* @throws IdentityProviderException If token cannot be fetched
*/
public function refreshAccessToken(string $refreshToken, array $options = [])
{
return $this->provider->getAccessToken(
'refresh_token',
array_merge(['refresh_token' => $refreshToken], $options)
);
}
/**
* Returns the "User" information (called a resource owner).
*
* @return \League\OAuth2\Client\Provider\ResourceOwnerInterface
*/
public function fetchUserFromToken(AccessToken $accessToken)
{
return $this->provider->getResourceOwner($accessToken);
}
/**
* Shortcut to fetch the access token and user all at once.
*
* Only use this if you don't need the access token, but only
* need the user.
*
* @return \League\OAuth2\Client\Provider\ResourceOwnerInterface
*/
public function fetchUser()
{
/** @var AccessToken $token */
$token = $this->getAccessToken();
return $this->fetchUserFromToken($token);
}
/**
* Returns the underlying OAuth2 provider.
*
* @return AbstractProvider
*/
public function getOAuth2Provider()
{
return $this->provider;
}
protected function isStateless(): bool
{
return $this->isStateless;
}
/**
* @return \Symfony\Component\HttpFoundation\Request
*/
private function getCurrentRequest()
{
$request = $this->requestStack->getCurrentRequest();
if (!$request) {
throw new \LogicException('There is no "current request", and it is needed to perform this action');
}
return $request;
}
/**
* @return SessionInterface
*/
private function getSession()
{
if (!$this->getCurrentRequest()->hasSession()) {
throw new \LogicException('In order to use "state", you must have a session. Set the OAuth2Client to stateless to avoid state');
}
return $this->getCurrentRequest()->getSession();
}
}

vendor/knpuniversity/oauth2-client-bundle/src/Client/OAuth2Client.php line 96