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<?php |
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namespace SilverStripe\Core\Startup; |
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use SilverStripe\Control\Director; |
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use SilverStripe\Control\HTTPRequest; |
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use SilverStripe\Control\HTTPResponse; |
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use SilverStripe\Control\HTTPResponse_Exception; |
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use SilverStripe\Control\Middleware\HTTPMiddleware; |
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use SilverStripe\Core\Application; |
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use SilverStripe\Security\Security; |
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/** |
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* Decorates application bootstrapping with errorcontrolchain |
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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 ErrorControlChainMiddleware implements HTTPMiddleware |
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{ |
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/** |
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* @var Application |
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*/ |
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protected $application = null; |
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/** |
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* Build error control chain for an application |
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* |
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* @param Application $application |
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*/ |
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public function __construct(Application $application) |
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{ |
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$this->application = $application; |
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} |
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/** |
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* @param HTTPRequest $request |
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* @return ConfirmationTokenChain |
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*/ |
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protected function prepareConfirmationTokenChain(HTTPRequest $request) |
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{ |
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$chain = new ConfirmationTokenChain(); |
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$chain->pushToken(new URLConfirmationToken('dev/build', $request)); |
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foreach (['flush'] as $parameter) { |
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$chain->pushToken(new ParameterConfirmationToken($parameter, $request)); |
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} |
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return $chain; |
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} |
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public function process(HTTPRequest $request, callable $next) |
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{ |
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$result = null; |
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// Prepare tokens and execute chain |
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$confirmationTokenChain = $this->prepareConfirmationTokenChain($request); |
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$errorControlChain = new ErrorControlChain(); |
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$errorControlChain |
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->then(function () use ($request, $errorControlChain, $confirmationTokenChain, $next, &$result) { |
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if ($confirmationTokenChain->suppressionRequired()) { |
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$confirmationTokenChain->suppressTokens(); |
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} else { |
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// If no redirection is necessary then we can disable error supression |
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$errorControlChain->setSuppression(false); |
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} |
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try { |
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// Check if a token is requesting a redirect |
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if ($confirmationTokenChain && $confirmationTokenChain->reloadRequired()) { |
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$result = $this->safeReloadWithTokens($request, $confirmationTokenChain); |
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} else { |
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// If no reload necessary, process application |
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$result = call_user_func($next, $request); |
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} |
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} catch (HTTPResponse_Exception $exception) { |
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$result = $exception->getResponse(); |
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} |
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}) |
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// Finally if a token was requested but there was an error while figuring out if it's allowed, do it anyway |
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->thenIfErrored(function () use ($confirmationTokenChain) { |
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if ($confirmationTokenChain && $confirmationTokenChain->reloadRequiredIfError()) { |
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try { |
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// Reload requires manual boot |
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$this->getApplication()->getKernel()->boot(false); |
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} finally { |
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// Given we're in an error state here, try to continue even if the kernel boot fails |
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$result = $confirmationTokenChain->reloadWithTokens(); |
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$result->output(); |
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} |
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} |
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}) |
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->execute(); |
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return $result; |
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} |
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/** |
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* Reload application with the given token, but only if either the user is authenticated, |
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* or authentication is impossible. |
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* |
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* @param HTTPRequest $request |
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* @param ConfirmationTokenChain $confirmationTokenChain |
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* @return HTTPResponse |
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*/ |
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protected function safeReloadWithTokens(HTTPRequest $request, ConfirmationTokenChain $confirmationTokenChain) |
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{ |
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// Safe reload requires manual boot |
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$this->getApplication()->getKernel()->boot(false); |
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// Ensure session is started |
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$request->getSession()->init($request); |
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// Request with ErrorDirector |
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$result = ErrorDirector::singleton()->handleRequestWithTokenChain( |
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$request, |
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$confirmationTokenChain, |
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$this->getApplication()->getKernel() |
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); |
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if ($result) { |
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return $result; |
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} |
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// Fail and redirect the user to the login page |
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$params = array_merge($request->getVars(), $confirmationTokenChain->params(false)); |
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$backURL = $confirmationTokenChain->getRedirectUrlBase() . '?' . http_build_query($params); |
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$loginPage = Director::absoluteURL(Security::config()->get('login_url')); |
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$loginPage .= "?BackURL=" . urlencode($backURL); |
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$result = new HTTPResponse(); |
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$result->redirect($loginPage); |
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return $result; |
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} |
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/** |
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* @return Application |
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*/ |
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public function getApplication() |
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{ |
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return $this->application; |
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} |
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/** |
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* @param Application $application |
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* @return $this |
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*/ |
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public function setApplication(Application $application) |
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{ |
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$this->application = $application; |
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return $this; |
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} |
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} |
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silverstripe /
silverstripe-framework
