BUG Director::test now calls RequestProcessor

This fixes https://github.com/silverstripe/silverstripe-framework/issues/2517
and provides some testing around the use of RequestProcessor in general.

control/Director.php

@@ -258,8 +258,18 @@ class Director implements TemplateGlobalProvider {
 
 		$request = new SS_HTTPRequest($httpMethod, $url, $getVars, $postVars, $body);
 		if($headers) foreach($headers as $k => $v) $request->addHeader($k, $v);
+		
+		// Pre-request filtering 
+		// @see issue #2517
+		$model = DataModel::inst();
+		$output = Injector::inst()->get('RequestProcessor')->preRequest($request, $session, $model);
+		if ($output === false) {
+			// @TODO Need to NOT proceed with the request in an elegant manner
+			throw new SS_HTTPResponse_Exception(_t('Director.INVALID_REQUEST', 'Invalid request'), 400);
+		}
+		
 		// TODO: Pass in the DataModel
-		$result = Director::handleRequest($request, $session, DataModel::inst());
+		$result = Director::handleRequest($request, $session, $model);
 
 		// Ensure that the result is an SS_HTTPResponse object
 		if(is_string($result)) {
@@ -272,6 +282,11 @@ class Director implements TemplateGlobalProvider {
 			}
 		}
 		
+		$output = Injector::inst()->get('RequestProcessor')->postRequest($request, $result, $model);
+		if ($output === false) {
+			throw new SS_HTTPResponse_Exception("Invalid response");
+		}
+		
 		// Restore the superglobals
 		$_REQUEST = $existingRequestVars; 
 		$_GET = $existingGetVars; 

control/injector/Injector.php

@@ -683,23 +683,24 @@ class Injector {
 	 *					class name of the object to register)
 	 * 
 	 */
-	public function registerService($service, $replace=null) {
+	public function registerService($service, $replace = null) {
 		$registerAt = get_class($service);
 		if ($replace != null) {
 			$registerAt = $replace;
 		}
 		
+		$this->specs[$registerAt] = array('class' => get_class($service));
 		$this->serviceCache[$registerAt] = $service;
 		$this->inject($service);
 	}
 	
 	/**
 	 * Register a service with an explicit name
+	 * 
+	 * @deprecated since 3.1.1
 	 */
 	public function registerNamedService($name, $service) {
-		$this->specs[$name] = array('class' => get_class($service));
-		$this->serviceCache[$name] = $service;
-		$this->inject($service);
+		return $this->registerService($service, $name);
 	}
 	
 	/**

tests/control/DirectorTest.php

@@ -344,6 +344,72 @@ class DirectorTest extends SapphireTest {
 
 		$_SERVER = $origServer;
 	}
+	
+	public function testRequestFilterInDirectorTest() {
+		$filter = new TestRequestFilter;
+		
+		$processor = new RequestProcessor(array($filter));
+		
+		$currentProcessor = Injector::inst()->get('RequestProcessor');
+		
+		Injector::inst()->registerService($processor, 'RequestProcessor');
+		
+		$response = Director::test('some-dummy-url');
+		
+		$this->assertEquals(1, $filter->preCalls);
+		$this->assertEquals(1, $filter->postCalls);
+		
+		$filter->failPost = true;
+		
+		$this->setExpectedException('SS_HTTPResponse_Exception');
+		
+		$response = Director::test('some-dummy-url');
+		
+		$this->assertEquals(2, $filter->preCalls);
+		$this->assertEquals(2, $filter->postCalls);
+		
+		$filter->failPre = true;
+		
+		$response = Director::test('some-dummy-url');
+		
+		$this->assertEquals(3, $filter->preCalls);
+		
+		// preCall 'false' will trigger an exception and prevent post call execution
+		$this->assertEquals(2, $filter->postCalls);
+
+		// swap back otherwise our wrapping test execution request may fail in the post processing later
+		Injector::inst()->registerService($currentProcessor, 'RequestProcessor');
+	}
+}
+
+class TestRequestFilter implements RequestFilter, TestOnly {
+	public $preCalls = 0;
+	public $postCalls = 0;
+	
+	public $failPre = false;
+	public $failPost = false;
+
+	public function preRequest(\SS_HTTPRequest $request, \Session $session, \DataModel $model) {
+		++$this->preCalls;
+		
+		if ($this->failPre) {
+			return false;
+		}
+	}
+
+	public function postRequest(\SS_HTTPRequest $request, \SS_HTTPResponse $response, \DataModel $model) {
+		++$this->postCalls;
+		
+		if ($this->failPost) {
+			return false;
+		}
+	}
+
+	public function reset() {
+		$this->preCalls = 0;
+		$this->postCalls = 0;
+	}
+
 }
 
 class DirectorTestRequest_Controller extends Controller implements TestOnly {