When requesting a permalink to an invalid file redirect

We need to do the redirect to update address bar.

apps/files/lib/Controller/ViewController.php

@@ -143,15 +143,14 @@ class ViewController extends Controller {
 	 * @param string $dir
 	 * @param string $view
 	 * @param string $fileid
-	 * @return TemplateResponse
+	 * @return TemplateResponse|RedirectResponse
 	 */
-	public function index($dir = '', $view = '', $fileid = null) {
-		$fileNotFound = false;
+	public function index($dir = '', $view = '', $fileid = null, $fileNotFound = false) {
 		if ($fileid !== null) {
 			try {
 				return $this->showFile($fileid);
 			} catch (NotFoundException $e) {
-				$fileNotFound = true;
+				return new RedirectResponse($this->urlGenerator->linkToRoute('files.view.index', ['fileNotFound' => true]));
 			}
 		}
 

apps/files/tests/Controller/ViewControllerTest.php

@@ -348,10 +348,14 @@ class ViewControllerTest extends TestCase {
 			->with(123)
 			->will($this->returnValue([]));
 
+		$this->urlGenerator->expects($this->once())
+			->method('linkToRoute')
+			->with('files.view.index', ['fileNotFound' => true])
+			->willReturn('redirect.url');
+
 		$response = $this->viewController->index('MyDir', 'MyView', '123');
-		$this->assertInstanceOf('OCP\AppFramework\Http\TemplateResponse', $response);
-		$params = $response->getParams();
-		$this->assertEquals(1, $params['fileNotFound']);
+		$this->assertInstanceOf('OCP\AppFramework\Http\RedirectResponse', $response);
+		$this->assertEquals('redirect.url', $response->getRedirectURL());
 	}
 
 	public function testShowFileRouteWithTrashedFile() {