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<?php |
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namespace SilverStripe\Core\Startup; |
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use SilverStripe\Control\Controller; |
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use SilverStripe\Control\Director; |
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use SilverStripe\Control\HTTPRequest; |
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/** |
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* This is used to protect dangerous URLs that need to be detected early in the request lifecycle |
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* by generating a one-time-use token & redirecting with that token included in the redirected URL |
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* |
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* @internal This class is designed specifically for use pre-startup and may change without warning |
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*/ |
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class URLConfirmationToken extends AbstractConfirmationToken |
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{ |
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/** |
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* @var string |
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*/ |
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protected $urlToCheck; |
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/** |
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* @var string |
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*/ |
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protected $currentURL; |
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/** |
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* @var string |
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*/ |
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protected $tokenParameterName; |
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/** |
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* @var bool |
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*/ |
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protected $urlExistsInBackURL; |
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/** |
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* @param string $urlToCheck URL to check |
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* @param HTTPRequest $request |
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*/ |
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public function __construct($urlToCheck, HTTPRequest $request) |
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{ |
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$this->urlToCheck = $urlToCheck; |
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$this->request = $request; |
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$this->currentURL = $request->getURL(false); |
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$this->tokenParameterName = preg_replace('/[^a-z0-9]/i', '', $urlToCheck) . 'token'; |
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$this->urlExistsInBackURL = $this->getURLExistsInBackURL($request); |
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// If the token provided is valid, mark it as such |
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$token = $request->getVar($this->tokenParameterName); |
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if ($this->checkToken($token)) { |
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$this->token = $token; |
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} |
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} |
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/** |
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* @param HTTPRequest $request |
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* @return bool |
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*/ |
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protected function getURLExistsInBackURL(HTTPRequest $request) |
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{ |
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$backURL = ltrim($request->getVar('BackURL'), '/'); |
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return (strpos($backURL, $this->urlToCheck) === 0); |
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} |
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/** |
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* @return bool |
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*/ |
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protected function urlMatches() |
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{ |
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return ($this->currentURL === $this->urlToCheck); |
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} |
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/** |
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* @return string |
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*/ |
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public function getURLToCheck() |
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{ |
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return $this->urlToCheck; |
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} |
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/** |
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* @return bool |
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*/ |
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public function urlExistsInBackURL() |
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{ |
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return $this->urlExistsInBackURL; |
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} |
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public function reloadRequired() |
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{ |
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return $this->urlMatches() && !$this->tokenProvided(); |
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} |
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public function reloadRequiredIfError() |
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{ |
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return $this->reloadRequired() || $this->urlExistsInBackURL(); |
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} |
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public function suppress() |
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{ |
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$_SERVER['REQUEST_URI'] = '/'; |
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$this->request->setURL('/'); |
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} |
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public function params($includeToken = true) |
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{ |
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$params = []; |
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if ($includeToken) { |
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$params[$this->tokenParameterName] = $this->genToken(); |
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} |
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return $params; |
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} |
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public function currentURL() |
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{ |
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return Controller::join_links(Director::baseURL(), $this->currentURL); |
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} |
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public function getRedirectUrlBase() |
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{ |
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return ($this->urlExistsInBackURL && !$this->urlMatches()) ? Director::baseURL() : $this->currentURL(); |
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} |
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public function getRedirectUrlParams() |
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{ |
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return ($this->urlExistsInBackURL && !$this->urlMatches()) |
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? $this->params() |
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: array_merge($this->request->getVars(), $this->params()); |
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} |
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protected function redirectURL() |
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{ |
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$query = http_build_query($this->getRedirectUrlParams()); |
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return Controller::join_links($this->getRedirectUrlBase(), '?' . $query); |
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} |
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} |
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silverstripe /
silverstripe-framework
