Allow OCS routes in Core and Settings

core/Controller/OCSController.php

+<?php
+
+namespace OC\Core\Controller;
+
+use OC\CapabilitiesManager;
+use OCP\AppFramework\Http\DataResponse;
+use OCP\IRequest;
+
+class OCSController extends \OCP\AppFramework\OCSController {
+
+	/** @var CapabilitiesManager */
+	private $capabilitiesManager;
+
+	/**
+	 * OCSController constructor.
+	 *
+	 * @param string $appName
+	 * @param IRequest $request
+	 * @param CapabilitiesManager $capabilitiesManager
+	 */
+	public function __construct($appName,
+								IRequest $request,
+								CapabilitiesManager $capabilitiesManager) {
+		parent::__construct($appName, $request);
+
+		$this->capabilitiesManager = $capabilitiesManager;
+	}
+
+	public function getCapabilities() {
+		$result = [];
+		list($major, $minor, $micro) = \OCP\Util::getVersion();
+		$result['version'] = array(
+			'major' => $major,
+			'minor' => $minor,
+			'micro' => $micro,
+			'string' => \OC_Util::getVersionString(),
+			'edition' => \OC_Util::getEditionString(),
+		);
+
+		$result['capabilities'] = $this->capabilitiesManager->getCapabilities();
+
+		return new DataResponse(['data' => $result]);
+	}
+}
\ No newline at end of file

lib/private/Route/Router.php

@@ -163,6 +163,11 @@ class Router implements IRouter {
 			$this->useCollection('root');
 			require_once __DIR__ . '/../../../settings/routes.php';
 			require_once __DIR__ . '/../../../core/routes.php';
+
+			// Also add the OCS collection
+			$collection = $this->getCollection('root.ocs');
+			$collection->addPrefix('/ocsapp');
+			$this->root->addCollection($collection);
 		}
 		if ($this->loaded) {
 			// include ocs routes, must be loaded last for /ocs prefix