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<?php
namespace League\OAuth2\Client\Tool;
use GuzzleHttp\Exception\BadResponseException;
use GuzzleHttp\Psr7\Uri;
use InvalidArgumentException;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
trait ProviderRedirectTrait
{
/**
* Maximum number of times to follow provider initiated redirects
*
* @var integer
*/
protected $redirectLimit = 2;
/**
* Retrieves a response for a given request and retrieves subsequent
* responses, with authorization headers, if a redirect is detected.
*
* @param RequestInterface $request
* @return ResponseInterface
* @throws BadResponseException
*/
protected function followRequestRedirects(RequestInterface $request)
{
$response = null;
$attempts = 0;
while ($attempts < $this->redirectLimit) {
$attempts++;
$response = $this->getHttpClient()->send($request, [
'allow_redirects' => false
]);
if ($this->isRedirect($response)) {
$redirectUrl = new Uri($response->getHeader('Location')[0]);
$request = $request->withUri($redirectUrl);
} else {
break;
}
}
return $response;
}
/**
* Returns the HTTP client instance.
*
* @return GuzzleHttp\ClientInterface
*/
abstract public function getHttpClient();
/**
* Retrieves current redirect limit.
*
* @return integer
*/
public function getRedirectLimit()
{
return $this->redirectLimit;
}
/**
* Determines if a given response is a redirect.
*
* @param ResponseInterface $response
*
* @return boolean
*/
protected function isRedirect(ResponseInterface $response)
{
$statusCode = $response->getStatusCode();
return $statusCode > 300 && $statusCode < 400 && $response->hasHeader('Location');
}
/**
* Sends a request instance and returns a response instance.
*
* WARNING: This method does not attempt to catch exceptions caused by HTTP
* errors! It is recommended to wrap this method in a try/catch block.
*
* @param RequestInterface $request
* @return ResponseInterface
*/
public function getResponse(RequestInterface $request)
{
try {
$response = $this->followRequestRedirects($request);
} catch (BadResponseException $e) {
$response = $e->getResponse();
}
return $response;
}
/**
* Updates the redirect limit.
*
* @param integer $limit
* @return League\OAuth2\Client\Provider\AbstractProvider
* @throws InvalidArgumentException
*/
public function setRedirectLimit($limit)
{
if (!is_int($limit)) {
throw new InvalidArgumentException('redirectLimit must be an integer.');
}
if ($limit < 1) {
throw new InvalidArgumentException('redirectLimit must be greater than or equal to one.');
}
$this->redirectLimit = $limit;
return $this;
}
}