Merge pull request #9311 from owncloud/storage-not-available

Handle storages not being available in webui and webdav

12 files changed, 232 insertions, 70 deletions

diff --git a/apps/files/ajax/list.php b/apps/files/ajax/list.php
index bae3628402f..b4641343ed4 100644
--- a/apps/files/ajax/list.php
+++ b/apps/files/ajax/list.php
@@ -2,29 +2,54 @@
 
 OCP\JSON::checkLoggedIn();
 \OC::$session->close();
+$l = OC_L10N::get('files');
 
 // Load the files
-$dir = isset( $_GET['dir'] ) ? $_GET['dir'] : '';
+$dir = isset($_GET['dir']) ? $_GET['dir'] : '';
 $dir = \OC\Files\Filesystem::normalizePath($dir);
-$dirInfo = \OC\Files\Filesystem::getFileInfo($dir);
-if (!$dirInfo || !$dirInfo->getType() === 'dir') {
-	header("HTTP/1.0 404 Not Found");
-	exit();
-}
-
-$data = array();
-$baseUrl = OCP\Util::linkTo('files', 'index.php') . '?dir=';
-
-$permissions = $dirInfo->getPermissions();
-
-$sortAttribute = isset( $_GET['sort'] ) ? $_GET['sort'] : 'name';
-$sortDirection = isset( $_GET['sortdirection'] ) ? ($_GET['sortdirection'] === 'desc') : false;
 
-// make filelist
-$files = \OCA\Files\Helper::getFiles($dir, $sortAttribute, $sortDirection);
-
-$data['directory'] = $dir;
-$data['files'] = \OCA\Files\Helper::formatFileInfos($files);
-$data['permissions'] = $permissions;
-
-OCP\JSON::success(array('data' => $data));
+try {
+	$dirInfo = \OC\Files\Filesystem::getFileInfo($dir);
+	if (!$dirInfo || !$dirInfo->getType() === 'dir') {
+		header("HTTP/1.0 404 Not Found");
+		exit();
+	}
+
+	$data = array();
+	$baseUrl = OCP\Util::linkTo('files', 'index.php') . '?dir=';
+
+	$permissions = $dirInfo->getPermissions();
+
+	$sortAttribute = isset($_GET['sort']) ? $_GET['sort'] : 'name';
+	$sortDirection = isset($_GET['sortdirection']) ? ($_GET['sortdirection'] === 'desc') : false;
+
+	// make filelist
+
+	$files = \OCA\Files\Helper::getFiles($dir, $sortAttribute, $sortDirection);
+	$data['directory'] = $dir;
+	$data['files'] = \OCA\Files\Helper::formatFileInfos($files);
+	$data['permissions'] = $permissions;
+
+	OCP\JSON::success(array('data' => $data));
+} catch (\OCP\Files\StorageNotAvailableException $e) {
+	OCP\JSON::error(array(
+		'data' => array(
+			'exception' => '\OCP\Files\StorageNotAvailableException',
+			'message' => $l->t('Storage not available')
+		)
+	));
+} catch (\OCP\Files\StorageInvalidException $e) {
+	OCP\JSON::error(array(
+		'data' => array(
+			'exception' => '\OCP\Files\StorageInvalidException',
+			'message' => $l->t('Storage invalid')
+		)
+	));
+} catch (\Exception $e) {
+	OCP\JSON::error(array(
+		'data' => array(
+			'exception' => '\Exception',
+			'message' => $l->t('Unknown error')
+		)
+	));
+}
diff --git a/apps/files/js/filelist.js b/apps/files/js/filelist.js
index c7fccc5dd66..94f161943a1 100644
--- a/apps/files/js/filelist.js
+++ b/apps/files/js/filelist.js
@@ -846,13 +846,18 @@
 		 * @param {boolean} force set to true to force changing directory
 		 */
 		changeDirectory: function(targetDir, changeUrl, force) {
+			var self = this;
 			var currentDir = this.getCurrentDirectory();
 			targetDir = targetDir || '/';
 			if (!force && currentDir === targetDir) {
 				return;
 			}
 			this._setCurrentDir(targetDir, changeUrl);
-			this.reload();
+			this.reload().then(function(success){
+				if (!success) {
+					self.changeDirectory(currentDir, true);
+				}
+			});
 		},
 		linkTo: function(dir) {
 			return OC.linkTo('files', 'index.php')+"?dir="+ encodeURIComponent(dir).replace(/%2F/g, '/');
@@ -912,7 +917,6 @@
 		 * @brief Reloads the file list using ajax call
 		 */
 		reload: function() {
-			var self = this;
 			this._selectedFiles = {};
 			this._selectionSummary.clear();
 			this.$el.find('.select-all').prop('checked', false);
@@ -926,14 +930,10 @@
 					dir : this.getCurrentDirectory(),
 					sort: this._sort,
 					sortdirection: this._sortDirection
-				},
-				error: function(result) {
-					self.reloadCallback(result);
-				},
-				success: function(result) {
-					self.reloadCallback(result);
 				}
 			});
+			var callBack = this.reloadCallback.bind(this);
+			return this._reloadCall.then(callBack, callBack);
 		},
 		reloadCallback: function(result) {
 			delete this._reloadCall;
@@ -941,17 +941,17 @@
 
 			if (!result || result.status === 'error') {
 				OC.Notification.show(result.data.message);
-				return;
+				return false;
 			}
 
 			if (result.status === 404) {
 				// go back home
 				this.changeDirectory('/');
-				return;
+				return false;
 			}
 			// aborted ?
 			if (result.status === 0){
-				return;
+				return true;
 			}
 
 			// TODO: should rather return upload file size through
@@ -963,6 +963,7 @@
 			}
 
 			this.setFiles(result.data.files);
+			return true
 		},
 
 		updateStorageStatistics: function(force) {
diff --git a/apps/files_sharing/js/external.js b/apps/files_sharing/js/external.js
index 1eb447da896..969a2b184d4 100644
--- a/apps/files_sharing/js/external.js
+++ b/apps/files_sharing/js/external.js
@@ -58,7 +58,7 @@ $(document).ready(function () {
 		if (params.remote && params.token && params.owner && params.name) {
 			// clear hash, it is unlikely that it contain any extra parameters
 			location.hash = '';
-			params.passwordProtected = parseInt(params.passwordProtected, 10) === 1;
+			params.passwordProtected = parseInt(params.protected, 10) === 1;
 			OCA.Sharing.showAddExternalDialog(
 				params.remote,
 				params.token,
diff --git a/apps/files_sharing/lib/external/manager.php b/apps/files_sharing/lib/external/manager.php
index af317cc2027..dda283f4952 100644
--- a/apps/files_sharing/lib/external/manager.php
+++ b/apps/files_sharing/lib/external/manager.php
@@ -113,7 +113,9 @@ class Manager {
 	 * @return Mount
 	 */
 	protected function mountShare($data) {
+		$data['manager'] = $this;
 		$mountPoint = '/' . $this->userSession->getUser()->getUID() . '/files' . $data['mountpoint'];
+		$data['mountpoint'] = $mountPoint;
 		$mount = new Mount(self::STORAGE, $mountPoint, $data, $this, $this->storageLoader);
 		$this->mountManager->addMount($mount);
 		return $mount;
diff --git a/apps/files_sharing/lib/external/scanner.php b/apps/files_sharing/lib/external/scanner.php
index 8921dd1a4c0..4dc5d4be9d8 100644
--- a/apps/files_sharing/lib/external/scanner.php
+++ b/apps/files_sharing/lib/external/scanner.php
@@ -19,23 +19,7 @@ class Scanner extends \OC\Files\Cache\Scanner {
 	}
 
 	public function scanAll() {
-		$remote = $this->storage->getRemote();
-		$token = $this->storage->getToken();
-		$password = $this->storage->getPassword();
-		$url = $remote . '/index.php/apps/files_sharing/shareinfo?t=' . $token;
-
-		$ch = curl_init();
-
-		curl_setopt($ch, CURLOPT_URL, $url);
-		curl_setopt($ch, CURLOPT_POST, 1);
-		curl_setopt($ch, CURLOPT_POSTFIELDS,
-			http_build_query(array('password' => $password)));
-		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-
-		$result = curl_exec($ch);
-		curl_close($ch);
-
-		$data = json_decode($result, true);
+		$data = $this->storage->getShareInfo();
 		if ($data['status'] === 'success') {
 			$this->addResult($data['data'], '');
 		} else {
diff --git a/apps/files_sharing/lib/external/storage.php b/apps/files_sharing/lib/external/storage.php
index 454196f15ae..3a0de51192e 100644
--- a/apps/files_sharing/lib/external/storage.php
+++ b/apps/files_sharing/lib/external/storage.php
@@ -10,7 +10,11 @@ namespace OCA\Files_Sharing\External;
 
 use OC\Files\Filesystem;
 use OC\Files\Storage\DAV;
+use OC\ForbiddenException;
 use OCA\Files_Sharing\ISharedStorage;
+use OCP\Files\NotFoundException;
+use OCP\Files\StorageInvalidException;
+use OCP\Files\StorageNotAvailableException;
 
 class Storage extends DAV implements ISharedStorage {
 	/**
@@ -35,7 +39,13 @@ class Storage extends DAV implements ISharedStorage {
 
 	private $updateChecked = false;
 
+	/**
+	 * @var \OCA\Files_Sharing\External\Manager
+	 */
+	private $manager;
+
 	public function __construct($options) {
+		$this->manager = $options['manager'];
 		$this->remote = $options['remote'];
 		$this->remoteUser = $options['owner'];
 		list($protocol, $remote) = explode('://', $this->remote);
@@ -108,6 +118,8 @@ class Storage extends DAV implements ISharedStorage {
 	 *
 	 * @param string $path
 	 * @param int $time
+	 * @throws \OCP\Files\StorageNotAvailableException
+	 * @throws \OCP\Files\StorageInvalidException
 	 * @return bool
 	 */
 	public function hasUpdated($path, $time) {
@@ -117,6 +129,77 @@ class Storage extends DAV implements ISharedStorage {
 			return false;
 		}
 		$this->updateChecked = true;
-		return parent::hasUpdated('', $time);
+		try {
+			return parent::hasUpdated('', $time);
+		} catch (StorageNotAvailableException $e) {
+			// see if we can find out why the share is unavailable\
+			try {
+				$this->getShareInfo();
+			} catch (NotFoundException $shareException) {
+				// a 404 can either mean that the share no longer exists or there is no ownCloud on the remote
+				if ($this->testRemote()) {
+					// valid ownCloud instance means that the public share no longer exists
+					// since this is permanent (re-sharing the file will create a new token)
+					// we remove the invalid storage
+					$this->manager->removeShare($this->mountPoint);
+					$this->manager->getMountManager()->removeMount($this->mountPoint);
+					throw new StorageInvalidException();
+				} else {
+					// ownCloud instance is gone, likely to be a temporary server configuration error
+					throw $e;
+				}
+			} catch(\Exception $shareException) {
+				// todo, maybe handle 403 better and ask the user for a new password
+				throw $e;
+			}
+			throw $e;
+		}
+	}
+
+	/**
+	 * check if the configured remote is a valid ownCloud instance
+	 *
+	 * @return bool
+	 */
+	protected function testRemote() {
+		try {
+			$result = file_get_contents($this->remote . '/status.php');
+			$data = json_decode($result);
+			return is_object($data) and !empty($data->version);
+		} catch (\Exception $e) {
+			return false;
+		}
+	}
+
+	public function getShareInfo() {
+		$remote = $this->getRemote();
+		$token = $this->getToken();
+		$password = $this->getPassword();
+		$url = $remote . '/index.php/apps/files_sharing/shareinfo?t=' . $token;
+
+		$ch = curl_init();
+
+		curl_setopt($ch, CURLOPT_URL, $url);
+		curl_setopt($ch, CURLOPT_POST, 1);
+		curl_setopt($ch, CURLOPT_POSTFIELDS,
+			http_build_query(array('password' => $password)));
+		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+
+		$result = curl_exec($ch);
+
+		$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+		curl_close($ch);
+
+		switch ($status) {
+			case 401:
+			case 403:
+				throw new ForbiddenException();
+			case 404:
+				throw new NotFoundException();
+			case 500:
+				throw new \Exception();
+		}
+
+		return json_decode($result, true);
 	}
 }
diff --git a/apps/files_sharing/tests/externalstorage.php b/apps/files_sharing/tests/externalstorage.php
index 60c5787f295..1258148af53 100644
--- a/apps/files_sharing/tests/externalstorage.php
+++ b/apps/files_sharing/tests/externalstorage.php
@@ -72,6 +72,7 @@ class Test_Files_Sharing_External_Storage extends \PHPUnit_Framework_TestCase {
 				'mountpoint' => 'remoteshare',
 				'token' => 'abcdef',
 				'password' => '',
+				'manager' => null
 			)
 		);
 		$this->assertEquals($baseUri, $storage->getBaseUri());
diff --git a/lib/private/connector/sabre/objecttree.php b/lib/private/connector/sabre/objecttree.php
index 54596db3c47..d7a96cfc88e 100644
--- a/lib/private/connector/sabre/objecttree.php
+++ b/lib/private/connector/sabre/objecttree.php
@@ -11,6 +11,8 @@ namespace OC\Connector\Sabre;
 use OC\Files\FileInfo;
 use OC\Files\Filesystem;
 use OC\Files\Mount\MoveableMount;
+use OCP\Files\StorageInvalidException;
+use OCP\Files\StorageNotAvailableException;
 
 class ObjectTree extends \Sabre\DAV\ObjectTree {
 
@@ -83,7 +85,13 @@ class ObjectTree extends \Sabre\DAV\ObjectTree {
 			}
 		} else {
 			// read from cache
-			$info = $this->fileView->getFileInfo($path);
+			try {
+				$info = $this->fileView->getFileInfo($path);
+			} catch (StorageNotAvailableException $e) {
+				throw new \Sabre\DAV\Exception\ServiceUnavailable('Storage not available');
+			} catch (StorageInvalidException $e){
+				throw new \Sabre\DAV\Exception\NotFound('Storage ' . $path . ' is invalid');
+			}
 		}
 
 		if (!$info) {
diff --git a/lib/private/files/mount/manager.php b/lib/private/files/mount/manager.php
index 45a9f339fba..e5180cfe173 100644
--- a/lib/private/files/mount/manager.php
+++ b/lib/private/files/mount/manager.php
@@ -27,6 +27,10 @@ class Manager {
 	 * @param string $mountPoint
 	 */
 	public function removeMount($mountPoint) {
+		$mountPoint = Filesystem::normalizePath($mountPoint);
+		if (strlen($mountPoint) > 1) {
+			$mountPoint .= '/';
+		}
 		unset($this->mounts[$mountPoint]);
 	}
 
diff --git a/lib/private/files/storage/dav.php b/lib/private/files/storage/dav.php
index 8b97f750204..726688fe444 100644
--- a/lib/private/files/storage/dav.php
+++ b/lib/private/files/storage/dav.php
@@ -8,6 +8,9 @@
 
 namespace OC\Files\Storage;
 
+use OCP\Files\StorageNotAvailableException;
+use Sabre\DAV\Exception;
+
 class DAV extends \OC\Files\Storage\Common {
 	protected $password;
 	protected $user;
@@ -463,29 +466,36 @@ class DAV extends \OC\Files\Storage\Common {
 	 *
 	 * @param string $path
 	 * @param int $time
+	 * @throws \OCP\Files\StorageNotAvailableException
 	 * @return bool
 	 */
 	public function hasUpdated($path, $time) {
 		$this->init();
-		$response = $this->client->propfind($this->encodePath($path), array(
-			'{DAV:}getlastmodified',
-			'{DAV:}getetag',
-			'{http://owncloud.org/ns}permissions'
-		));
-		if (isset($response['{DAV:}getetag'])) {
-			$cachedData = $this->getCache()->get($path);
-			$etag = trim($response['{DAV:}getetag'], '"');
-			if ($cachedData['etag'] !== $etag) {
-				return true;
-			} else if (isset($response['{http://owncloud.org/ns}permissions'])) {
-				$permissions = $this->parsePermissions($response['{http://owncloud.org/ns}permissions']);
-				return $permissions !== $cachedData['permissions'];
+		try {
+			$response = $this->client->propfind($this->encodePath($path), array(
+				'{DAV:}getlastmodified',
+				'{DAV:}getetag',
+				'{http://owncloud.org/ns}permissions'
+			));
+			if (isset($response['{DAV:}getetag'])) {
+				$cachedData = $this->getCache()->get($path);
+				$etag = trim($response['{DAV:}getetag'], '"');
+				if ($cachedData['etag'] !== $etag) {
+					return true;
+				} else if (isset($response['{http://owncloud.org/ns}permissions'])) {
+					$permissions = $this->parsePermissions($response['{http://owncloud.org/ns}permissions']);
+					return $permissions !== $cachedData['permissions'];
+				} else {
+					return false;
+				}
 			} else {
-				return false;
+				$remoteMtime = strtotime($response['{DAV:}getlastmodified']);
+				return $remoteMtime > $time;
 			}
-		} else {
-			$remoteMtime = strtotime($response['{DAV:}getlastmodified']);
-			return $remoteMtime > $time;
+		} catch (Exception\NotFound $e) {
+			return false;
+		} catch (Exception $e) {
+			throw new StorageNotAvailableException();
 		}
 	}
 }
diff --git a/lib/public/files/storageinvalidexception.php b/lib/public/files/storageinvalidexception.php
new file mode 100644
index 00000000000..7419ccc1d11
--- /dev/null
+++ b/lib/public/files/storageinvalidexception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ * Copyright (c) 2014 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+/**
+ * Public interface of ownCloud for apps to use.
+ * Files/AlreadyExistsException class
+ */
+
+// use OCP namespace for all classes that are considered public.
+// This means that they should be used by apps instead of the internal ownCloud classes
+namespace OCP\Files;
+
+/**
+ * Storage has invalid configuration
+ */
+class StorageInvalidException extends \Exception {
+}
diff --git a/lib/public/files/storagenotavailableexception.php b/lib/public/files/storagenotavailableexception.php
new file mode 100644
index 00000000000..b526cb4ea0f
--- /dev/null
+++ b/lib/public/files/storagenotavailableexception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ * Copyright (c) 2014 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+/**
+ * Public interface of ownCloud for apps to use.
+ * Files/AlreadyExistsException class
+ */
+
+// use OCP namespace for all classes that are considered public.
+// This means that they should be used by apps instead of the internal ownCloud classes
+namespace OCP\Files;
+
+/**
+ * Storage is temporarily not available
+ */
+class StorageNotAvailableException extends \Exception {
+}