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<?php |
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namespace SilverStripe\Control; |
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use SilverStripe\Control\Middleware\HTTPMiddlewareAware; |
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use SilverStripe\Core\Application; |
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use SilverStripe\Core\Environment; |
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use SilverStripe\Core\Kernel; |
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use SilverStripe\Core\Startup\FlushDiscoverer; |
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use SilverStripe\Core\Startup\CompositeFlushDiscoverer; |
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use SilverStripe\Core\Startup\CallbackFlushDiscoverer; |
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use SilverStripe\Core\Startup\RequestFlushDiscoverer; |
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use SilverStripe\Core\Startup\ScheduledFlushDiscoverer; |
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use SilverStripe\Core\Startup\DeployFlushDiscoverer; |
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/** |
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* Invokes the HTTP application within an ErrorControlChain |
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*/ |
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class HTTPApplication implements Application |
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{ |
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use HTTPMiddlewareAware; |
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/** |
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* @var Kernel |
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*/ |
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protected $kernel; |
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/** |
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* A custom FlushDiscoverer to be kept here |
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* |
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* @var FlushDiscoverer |
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*/ |
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private $flushDiscoverer = null; |
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/** |
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* Initialize the application with a kernel instance |
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* |
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* @param Kernel $kernel |
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*/ |
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public function __construct(Kernel $kernel) |
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{ |
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$this->kernel = $kernel; |
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} |
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/** |
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* Override the default flush discovery |
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* |
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* @param FlushDiscoverer $discoverer |
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* |
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* @return $this |
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*/ |
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public function setFlushDiscoverer(FlushDiscoverer $discoverer) |
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{ |
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$this->flushDiscoverer = $discoverer; |
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return $this; |
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} |
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/** |
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* Returns the current flush discoverer |
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* |
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* @param HTTPRequest $request a request to probe for flush parameters |
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* |
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* @return FlushDiscoverer |
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*/ |
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public function getFlushDiscoverer(HTTPRequest $request) |
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{ |
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if ($this->flushDiscoverer) { |
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return $this->flushDiscoverer; |
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} |
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return new CompositeFlushDiscoverer([ |
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new ScheduledFlushDiscoverer($this->kernel), |
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new DeployFlushDiscoverer($this->kernel), |
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new RequestFlushDiscoverer($request, $this->getEnvironmentType()) |
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]); |
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} |
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/** |
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* Return the current environment type (dev, test or live) |
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* Only checks Kernel and Server ENV as we |
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* don't have sessions initialized yet |
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* |
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* @return string |
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*/ |
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protected function getEnvironmentType() |
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{ |
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$kernel_env = $this->kernel->getEnvironment(); |
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$server_env = Environment::getEnv('SS_ENVIRONMENT_TYPE'); |
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$env = !is_null($kernel_env) ? $kernel_env : $server_env; |
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return $env; |
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} |
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/** |
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* Get the kernel for this application |
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* |
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* @return Kernel |
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*/ |
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public function getKernel() |
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{ |
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return $this->kernel; |
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} |
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/** |
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* Handle the given HTTP request |
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* |
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* @param HTTPRequest $request |
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* @return HTTPResponse |
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*/ |
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public function handle(HTTPRequest $request) |
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{ |
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$flush = (bool) $this->getFlushDiscoverer($request)->shouldFlush(); |
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// Ensure boot is invoked |
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return $this->execute($request, static function (HTTPRequest $request) { |
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return Director::singleton()->handleRequest($request); |
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}, $flush); |
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} |
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/** |
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* Safely boot the application and execute the given main action |
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* |
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* @param HTTPRequest $request |
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* @param callable $callback |
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* @param bool $flush |
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* |
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* @return HTTPResponse |
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*/ |
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public function execute(HTTPRequest $request, callable $callback, $flush = false) |
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{ |
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try { |
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return $this->callMiddleware($request, function ($request) use ($callback, $flush) { |
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// Pre-request boot |
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$this->getKernel()->boot($flush); |
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return call_user_func($callback, $request); |
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}); |
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} catch (HTTPResponse_Exception $ex) { |
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return $ex->getResponse(); |
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} finally { |
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$this->getKernel()->shutdown(); |
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} |
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} |
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} |
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