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<?php |
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namespace Http\Client\Common\Plugin; |
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use Http\Client\Common\Exception\CircularRedirectionException; |
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use Http\Client\Common\Exception\MultipleRedirectionException; |
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use Http\Client\Common\Plugin; |
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use Http\Client\Exception\HttpException; |
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use Psr\Http\Message\MessageInterface; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\UriInterface; |
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use Symfony\Component\OptionsResolver\OptionsResolver; |
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/** |
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* Follow redirections. |
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* |
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* @author Joel Wurtz <[email protected]> |
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*/ |
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class RedirectPlugin implements Plugin |
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{ |
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/** |
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* Rule on how to redirect, change method for the new request. |
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* |
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* @var array |
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*/ |
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protected $redirectCodes = [ |
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300 => [ |
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'switch' => [ |
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'unless' => ['GET', 'HEAD'], |
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'to' => 'GET', |
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], |
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'multiple' => true, |
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'permanent' => false, |
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], |
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301 => [ |
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'switch' => [ |
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'unless' => ['GET', 'HEAD'], |
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'to' => 'GET', |
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], |
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'multiple' => false, |
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'permanent' => true, |
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], |
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302 => [ |
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'switch' => [ |
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'unless' => ['GET', 'HEAD'], |
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'to' => 'GET', |
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], |
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'multiple' => false, |
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'permanent' => false, |
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], |
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303 => [ |
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'switch' => [ |
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'unless' => ['GET', 'HEAD'], |
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'to' => 'GET', |
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], |
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'multiple' => false, |
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'permanent' => false, |
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], |
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307 => [ |
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'switch' => false, |
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'multiple' => false, |
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'permanent' => false, |
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], |
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308 => [ |
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'switch' => false, |
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'multiple' => false, |
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'permanent' => true, |
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], |
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]; |
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/** |
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* Determine how header should be preserved from old request. |
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* |
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* @var bool|array |
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* |
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* true will keep all previous headers (default value) |
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* false will ditch all previous headers |
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* string[] will keep only headers with the specified names |
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*/ |
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protected $preserveHeader; |
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/** |
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* Store all previous redirect from 301 / 308 status code. |
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* |
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* @var array |
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*/ |
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protected $redirectStorage = []; |
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/** |
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* Whether the location header must be directly used for a multiple redirection status code (300). |
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* |
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* @var bool |
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*/ |
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protected $useDefaultForMultiple; |
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/** |
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* @var array |
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*/ |
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protected $circularDetection = []; |
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/** |
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* @param array $config { |
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* |
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* @var bool|string[] $preserve_header True keeps all headers, false remove all of them, an array is interpreted as a list of header names to keep. |
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* @var bool $use_default_for_multiple Whether the location header must be directly used for a multiple redirection status code (300). |
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* } |
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*/ |
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public function __construct(array $config = []) |
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{ |
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$resolver = new OptionsResolver(); |
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$resolver->setDefaults([ |
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'preserve_header' => true, |
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'use_default_for_multiple' => true, |
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]); |
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$resolver->setAllowedTypes('preserve_header', ['bool', 'array']); |
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$resolver->setAllowedTypes('use_default_for_multiple', 'bool'); |
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$resolver->setNormalizer('preserve_header', function (OptionsResolver $resolver, $value) { |
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if (is_bool($value) && false === $value) { |
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return []; |
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} |
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return $value; |
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}); |
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$options = $resolver->resolve($config); |
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$this->preserveHeader = $options['preserve_header']; |
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$this->useDefaultForMultiple = $options['use_default_for_multiple']; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function handleRequest(RequestInterface $request, callable $next, callable $first) |
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{ |
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// Check in storage |
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if (array_key_exists($request->getRequestTarget(), $this->redirectStorage)) { |
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$uri = $this->redirectStorage[$request->getRequestTarget()]['uri']; |
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$statusCode = $this->redirectStorage[$request->getRequestTarget()]['status']; |
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$redirectRequest = $this->buildRedirectRequest($request, $uri, $statusCode); |
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return $first($redirectRequest); |
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} |
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return $next($request)->then(function (ResponseInterface $response) use ($request, $first) { |
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$statusCode = $response->getStatusCode(); |
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if (!array_key_exists($statusCode, $this->redirectCodes)) { |
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return $response; |
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} |
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$uri = $this->createUri($response, $request); |
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$redirectRequest = $this->buildRedirectRequest($request, $uri, $statusCode); |
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$chainIdentifier = spl_object_hash((object) $first); |
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if (!array_key_exists($chainIdentifier, $this->circularDetection)) { |
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$this->circularDetection[$chainIdentifier] = []; |
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} |
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$this->circularDetection[$chainIdentifier][] = $request->getRequestTarget(); |
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if (in_array($redirectRequest->getRequestTarget(), $this->circularDetection[$chainIdentifier])) { |
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throw new CircularRedirectionException('Circular redirection detected', $request, $response); |
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} |
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if ($this->redirectCodes[$statusCode]['permanent']) { |
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$this->redirectStorage[$request->getRequestTarget()] = [ |
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'uri' => $uri, |
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'status' => $statusCode, |
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]; |
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} |
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// Call redirect request in synchrone |
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$redirectPromise = $first($redirectRequest); |
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return $redirectPromise->wait(); |
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}); |
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} |
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/** |
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* Builds the redirect request. |
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* |
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* @param RequestInterface $request Original request |
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* @param UriInterface $uri New uri |
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* @param int $statusCode Status code from the redirect response |
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* |
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* @return MessageInterface|RequestInterface |
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*/ |
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protected function buildRedirectRequest(RequestInterface $request, UriInterface $uri, $statusCode) |
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{ |
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$request = $request->withUri($uri); |
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if (false !== $this->redirectCodes[$statusCode]['switch'] && !in_array($request->getMethod(), $this->redirectCodes[$statusCode]['switch']['unless'])) { |
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$request = $request->withMethod($this->redirectCodes[$statusCode]['switch']['to']); |
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} |
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if (is_array($this->preserveHeader)) { |
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$headers = array_keys($request->getHeaders()); |
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foreach ($headers as $name) { |
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if (!in_array($name, $this->preserveHeader)) { |
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$request = $request->withoutHeader($name); |
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} |
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1 |
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} |
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} |
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return $request; |
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} |
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/** |
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* Creates a new Uri from the old request and the location header. |
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* |
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* @param ResponseInterface $response The redirect response |
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* @param RequestInterface $request The original request |
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* |
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* @throws HttpException If location header is not usable (missing or incorrect) |
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* @throws MultipleRedirectionException If a 300 status code is received and default location cannot be resolved (doesn't use the location header or not present) |
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* |
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* @return UriInterface |
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*/ |
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private function createUri(ResponseInterface $response, RequestInterface $request) |
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{ |
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if ($this->redirectCodes[$response->getStatusCode()]['multiple'] && (!$this->useDefaultForMultiple || !$response->hasHeader('Location'))) { |
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throw new MultipleRedirectionException('Cannot choose a redirection', $request, $response); |
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} |
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if (!$response->hasHeader('Location')) { |
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throw new HttpException('Redirect status code, but no location header present in the response', $request, $response); |
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} |
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$location = $response->getHeaderLine('Location'); |
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$parsedLocation = parse_url($location); |
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if (false === $parsedLocation) { |
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throw new HttpException(sprintf('Location %s could not be parsed', $location), $request, $response); |
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} |
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$uri = $request->getUri(); |
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if (array_key_exists('scheme', $parsedLocation)) { |
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$uri = $uri->withScheme($parsedLocation['scheme']); |
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} |
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if (array_key_exists('host', $parsedLocation)) { |
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$uri = $uri->withHost($parsedLocation['host']); |
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} |
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if (array_key_exists('port', $parsedLocation)) { |
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$uri = $uri->withPort($parsedLocation['port']); |
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} |
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if (array_key_exists('path', $parsedLocation)) { |
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$uri = $uri->withPath($parsedLocation['path']); |
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} |
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if (array_key_exists('query', $parsedLocation)) { |
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$uri = $uri->withQuery($parsedLocation['query']); |
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} else { |
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$uri = $uri->withQuery(''); |
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} |
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if (array_key_exists('fragment', $parsedLocation)) { |
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$uri = $uri->withFragment($parsedLocation['fragment']); |
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} else { |
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$uri = $uri->withFragment(''); |
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} |
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return $uri; |
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} |
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} |
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php-http /
client-common
