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<?php |
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namespace SilverStripe\Control\Middleware; |
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use SilverStripe\Control\Controller; |
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use SilverStripe\Control\Director; |
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use SilverStripe\Control\Middleware\URLSpecialsMiddleware\FlushScheduler; |
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use SilverStripe\Control\Middleware\URLSpecialsMiddleware\SessionEnvTypeSwitcher; |
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use SilverStripe\Control\HTTPRequest; |
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use SilverStripe\Control\HTTPResponse; |
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use SilverStripe\Security\RandomGenerator; |
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/** |
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* Check the request for the URL special variables. |
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* Performs authorisation, confirmation and actions for some of those. |
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* |
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* WARNING: Bypasses only disable authorisation and confirmation, but not actions nor redirects |
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* |
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* The rules are: |
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* - flush GET parameter |
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* - isDev GET parameter |
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* - isTest GET parameter |
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* - dev/build URL |
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* |
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* @see https://docs.silverstripe.org/en/4/developer_guides/debugging/url_variable_tools/ special variables docs |
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* |
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* {@inheritdoc} |
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*/ |
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class URLSpecialsMiddleware extends PermissionAwareConfirmationMiddleware |
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{ |
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use FlushScheduler; |
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use SessionEnvTypeSwitcher; |
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/** |
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* Initializes the middleware with the required rules |
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*/ |
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public function __construct() |
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{ |
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parent::__construct( |
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new ConfirmationMiddleware\GetParameter("flush"), |
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new ConfirmationMiddleware\GetParameter("isDev"), |
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new ConfirmationMiddleware\GetParameter("isTest"), |
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new ConfirmationMiddleware\UrlPathStartswith("dev/build") |
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); |
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} |
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/** |
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* Looks up for the special flags passed in the request |
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* and schedules the changes accordingly for the next request. |
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* Returns a redirect to the same page (with a random token) if |
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* there are changes introduced by the flags. |
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* Returns null if there is no impact introduced by the flags. |
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* |
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* @param HTTPRequest $request |
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* |
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* @return null|HTTPResponse redirect to the same url |
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*/ |
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public function buildImpactRedirect(HTTPRequest $request) |
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{ |
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$flush = $this->scheduleFlush($request); |
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$env_type = $this->setSessionEnvType($request); |
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if ($flush || $env_type) { |
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// the token only purpose is to invalidate browser/proxy cache |
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$request['urlspecialstoken'] = bin2hex(random_bytes(4)); |
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$result = new HTTPResponse(); |
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$result->redirect( |
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Controller::join_links( |
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Director::baseURL(), |
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$request->getURL(true) |
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) |
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); |
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return $result; |
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} |
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} |
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protected function confirmedEffect(HTTPRequest $request) |
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{ |
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if ($response = $this->buildImpactRedirect($request)) { |
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HTTPCacheControlMiddleware::singleton()->disableCache(true); |
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return $response; |
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} |
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} |
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} |
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sminnee /
silverstripe-framework
