OCS API for server-to-server sharing

14 files changed, 612 insertions, 55 deletions

diff --git a/apps/files_sharing/lib/api.php b/apps/files_sharing/api/local.php
index 8556036f118..d9291c29f61 100644
--- a/apps/files_sharing/lib/api.php
+++ b/apps/files_sharing/api/local.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * ownCloud
+ * ownCloud - OCS API for local shares
  *
  * @author Bjoern Schiessle
  * @copyright 2013 Bjoern Schiessle schiessle@owncloud.com
@@ -20,9 +20,9 @@
  *
  */
 
-namespace OCA\Files\Share;
+namespace OCA\Files_Sharing\API;
 
-class Api {
+class Local {
 
 	/**
 	 * get all shares
diff --git a/apps/files_sharing/api/server2server.php b/apps/files_sharing/api/server2server.php
new file mode 100644
index 00000000000..2949e2dd09c
--- /dev/null
+++ b/apps/files_sharing/api/server2server.php
@@ -0,0 +1,224 @@
+<?php
+/**
+ * ownCloud - OCS API for server-to-server shares
+ *
+ * @copyright (C) 2014 ownCloud, Inc.
+ *
+ * @author Bjoern Schiessle <schiessle@owncloud.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\Files_Sharing\API;
+
+class Server2Server {
+
+	/**
+	 * create a new share
+	 *
+	 * @param array $params
+	 * @return \OC_OCS_Result
+	 */
+	public function createShare($params) {
+
+		if (!$this->isS2SEnabled(true)) {
+			return \OC_OCS_Result(null, 503, 'Server does not support server-to-server sharing');
+		}
+
+		$remote = isset($_POST['remote']) ? $_POST['remote'] : null;
+		$token = isset($_POST['token']) ? $_POST['token'] : null;
+		$name = isset($_POST['name']) ? $_POST['name'] : null;
+		$owner = isset($_POST['owner']) ? $_POST['owner'] : null;
+		$shareWith = isset($_POST['shareWith']) ? $_POST['shareWith'] : null;
+		$remoteId = isset($_POST['remote_id']) ? (int)$_POST['remote_id'] : null;
+
+		if ($remote && $token && $name && $owner && $remoteId && $shareWith) {
+
+			if(!\OCP\Util::isValidFileName($name)) {
+				return new \OC_OCS_Result(null, 400, 'The mountpoint name contains invalid characters.');
+			}
+
+			if (!\OCP\User::userExists($shareWith)) {
+				return new \OC_OCS_Result(null, 400, 'User does not exists');
+			}
+
+			\OC_Util::setupFS($shareWith);
+
+			$mountPoint = \OC\Files\Filesystem::normalizePath('/' . $name);
+			$name = \OCP\Files::buildNotExistingFileName('/', $name);
+
+			try {
+				\OCA\Files_Sharing\Helper::addServer2ServerShare($remote, $token, $name, $mountPoint, $owner, $shareWith, '', $remoteId);
+
+				\OC::$server->getActivityManager()->publishActivity(
+						'files_sharing', \OCA\Files_Sharing\Activity::SUBJECT_REMOTE_SHARE_RECEIVED, array($owner), '', array(),
+						'', '', $shareWith, \OCA\Files_Sharing\Activity::TYPE_REMOTE_SHARE, \OCA\Files_Sharing\Activity::PRIORITY_LOW);
+
+				return new \OC_OCS_Result();
+			} catch (\Exception $e) {
+				return new \OC_OCS_Result(null, 500, 'server can not add remote share, ' . $e->getMessage());
+			}
+		}
+
+		return new \OC_OCS_Result(null, 400, 'server can not add remote share, missing parameter');
+	}
+
+	/**
+	 * accept server-to-server share
+	 *
+	 * @param array $params
+	 * @return \OC_OCS_Result
+	 */
+	public function acceptShare($params) {
+
+		if (!$this->isS2SEnabled()) {
+			return \OC_OCS_Result(null, 503, 'Server does not support server-to-server sharing');
+		}
+
+		$id = $params['id'];
+		$token = isset($_POST['token']) ? $_POST['token'] : null;
+		$share = self::getShare($id, $token);
+
+		if ($share) {
+			list($file, $link) = self::getFile($share['uid_owner'], $share['file_source']);
+
+			\OC::$server->getActivityManager()->publishActivity(
+					'files_sharing', \OCA\Files_Sharing\Activity::SUBJECT_REMOTE_SHARE_ACCEPTED, array($share['share_with'], basename($file)), '', array(),
+					$file, $link, $share['uid_owner'], \OCA\Files_Sharing\Activity::TYPE_REMOTE_SHARE, \OCA\Files_Sharing\Activity::PRIORITY_LOW);
+		}
+
+		return new \OC_OCS_Result();
+	}
+
+	/**
+	 * decline server-to-server share
+	 *
+	 * @param array $params
+	 * @return \OC_OCS_Result
+	 */
+	public function declineShare($params) {
+
+		if (!$this->isS2SEnabled()) {
+			return \OC_OCS_Result(null, 503, 'Server does not support server-to-server sharing');
+		}
+
+		$id = $params['id'];
+		$token = isset($_POST['token']) ? $_POST['token'] : null;
+
+		$share = $this->getShare($id, $token);
+
+		if ($share) {
+			// userId must be set to the user who unshares
+			\OCP\Share::unshare($share['item_type'], $share['item_source'], $share['share_type'], null, $share['uid_owner']);
+
+			list($file, $link) = $this->getFile($share['uid_owner'], $share['file_source']);
+
+			\OC::$server->getActivityManager()->publishActivity(
+					'files_sharing', \OCA\Files_Sharing\Activity::SUBJECT_REMOTE_SHARE_DECLINED, array($share['share_with'], basename($file)), '', array(),
+					$file, $link, $share['uid_owner'], \OCA\Files_Sharing\Activity::TYPE_REMOTE_SHARE, \OCA\Files_Sharing\Activity::PRIORITY_LOW);
+		}
+
+		return new \OC_OCS_Result();
+	}
+
+	/**
+	 * remove server-to-server share if it was unshared by the owner
+	 *
+	 * @param array $params
+	 * @return \OC_OCS_Result
+	 */
+	public function unshare($params) {
+
+		if (!$this->isS2SEnabled()) {
+			return \OC_OCS_Result(null, 503, 'Server does not support server-to-server sharing');
+		}
+
+		$id = $params['id'];
+		$token = isset($_POST['token']) ? $_POST['token'] : null;
+
+		$query = \OCP\DB::prepare('SELECT * FROM `*PREFIX*share_external` WHERE `remote_id` = ? AND `share_token` = ?');
+		$query->execute(array($id, $token));
+		$share = $query->fetchRow();
+
+		if ($token && $id && !empty($share)) {
+
+			$owner = $share['owner'] . '@' . $share['remote'];
+			$mountpoint = $share['mountpoint'];
+			$user = $share['user'];
+
+			$query = \OCP\DB::prepare('DELETE FROM `*PREFIX*share_external` WHERE `remote_id` = ? AND `share_token` = ?');
+			$query->execute(array($id, $token));
+
+			\OC::$server->getActivityManager()->publishActivity(
+					'files_sharing', \OCA\Files_Sharing\Activity::SUBJECT_REMOTE_SHARE_DECLINED, array($owner, $mountpoint), '', array(),
+					'', '', $user, \OCA\Files_Sharing\Activity::TYPE_REMOTE_SHARE, \OCA\Files_Sharing\Activity::PRIORITY_MEDIUM);
+		}
+
+		return new \OC_OCS_Result();
+	}
+
+	/**
+	 * get share
+	 *
+	 * @param int $id
+	 * @param string $token
+	 * @return array
+	 */
+	private function getShare($id, $token) {
+		$query = \OCP\DB::prepare('SELECT * FROM `*PREFIX*share` WHERE `id` = ? AND `token` = ? AND `share_type` = ?');
+		$query->execute(array($id, $token, \OCP\Share::SHARE_TYPE_REMOTE));
+		$share = $query->fetchRow();
+
+		return $share;
+	}
+
+	/**
+	 * get file
+	 *
+	 * @param string $user
+	 * @param int $fileSource
+	 * @return array with internal path of the file and a absolute link to it
+	 */
+	private function getFile($user, $fileSource) {
+		\OC_Util::setupFS($user);
+
+		$file = \OC\Files\Filesystem::getPath($fileSource);
+		$args = \OC\Files\Filesystem::is_dir($file) ? array('dir' => $file) : array('dir' => dirname($file), 'scrollto' => $file);
+		$link = \OCP\Util::linkToAbsolute('files', 'index.php', $args);
+
+		return array($file, $link);
+
+	}
+
+	/**
+	 * check if server-to-server sharing is enabled
+	 *
+	 * @param bool $incoming
+	 * @return bool
+	 */
+	private function isS2SEnabled($incoming = false) {
+
+		$result = \OCP\App::isEnabled('files_sharing');
+
+		if ($incoming) {
+			$result = $result && \OCA\Files_Sharing\Helper::isIncomingServer2serverShareEnabled();
+		} else {
+			$result = $result && \OCA\Files_Sharing\Helper::isOutgoingServer2serverShareEnabled();
+		}
+
+		return $result;
+	}
+
+}
diff --git a/apps/files_sharing/appinfo/app.php b/apps/files_sharing/appinfo/app.php
index a01f8d98c7d..329afa07519 100644
--- a/apps/files_sharing/appinfo/app.php
+++ b/apps/files_sharing/appinfo/app.php
@@ -8,7 +8,6 @@ OC::$CLASSPATH['OC\Files\Cache\Shared_Cache'] = 'files_sharing/lib/cache.php';
 OC::$CLASSPATH['OC\Files\Cache\Shared_Permissions'] = 'files_sharing/lib/permissions.php';
 OC::$CLASSPATH['OC\Files\Cache\Shared_Updater'] = 'files_sharing/lib/updater.php';
 OC::$CLASSPATH['OC\Files\Cache\Shared_Watcher'] = 'files_sharing/lib/watcher.php';
-OC::$CLASSPATH['OCA\Files\Share\Api'] = 'files_sharing/lib/api.php';
 OC::$CLASSPATH['OCA\Files\Share\Maintainer'] = 'files_sharing/lib/maintainer.php';
 OC::$CLASSPATH['OCA\Files\Share\Proxy'] = 'files_sharing/lib/proxy.php';
 
@@ -28,6 +27,10 @@ OCP\Util::addScript('files_sharing', 'external');
 
 OC_FileProxy::register(new OCA\Files\Share\Proxy());
 
+\OC::$server->getActivityManager()->registerExtension(function() {
+		return new \OCA\Files_Sharing\Activity();
+});
+
 $config = \OC::$server->getConfig();
 if ($config->getAppValue('core', 'shareapi_enabled', 'yes') === 'yes') {
 
diff --git a/apps/files_sharing/appinfo/database.xml b/apps/files_sharing/appinfo/database.xml
index 73d64c527b7..38718ab0773 100644
--- a/apps/files_sharing/appinfo/database.xml
+++ b/apps/files_sharing/appinfo/database.xml
@@ -23,6 +23,12 @@
 				<comments>Url of the remove owncloud instance</comments>
 			</field>
 			<field>
+				<name>remote_id</name>
+				<type>integer</type>
+				<notnull>true</notnull>
+				<length>4</length>
+			</field>
+			<field>
 				<name>share_token</name>
 				<type>text</type>
 				<notnull>true</notnull>
@@ -32,7 +38,7 @@
 			<field>
 				<name>password</name>
 				<type>text</type>
-				<notnull>true</notnull>
+				<notnull>false</notnull>
 				<length>64</length>
 				<comments>Optional password for the public share</comments>
 			</field>
@@ -71,6 +77,13 @@
 				<length>32</length>
 				<comments>md5 hash of the mountpoint</comments>
 			</field>
+			<field>
+				<name>accepted</name>
+				<type>integer</type>
+				<default>0</default>
+				<notnull>true</notnull>
+				<length>4</length>
+			</field>
 			<index>
 				<name>sh_external_user</name>
 				<field>
diff --git a/apps/files_sharing/appinfo/routes.php b/apps/files_sharing/appinfo/routes.php
index 68f33d94995..41bdf554fc5 100644
--- a/apps/files_sharing/appinfo/routes.php
+++ b/apps/files_sharing/appinfo/routes.php
@@ -22,25 +22,25 @@ $this->create('sharing_external_test_remote', '/testremote')
 
 OC_API::register('get',
 		'/apps/files_sharing/api/v1/shares',
-		array('\OCA\Files\Share\Api', 'getAllShares'),
+		array('\OCA\Files_Sharing\API\Local', 'getAllShares'),
 		'files_sharing');
 
 OC_API::register('post',
 		'/apps/files_sharing/api/v1/shares',
-		array('\OCA\Files\Share\Api', 'createShare'),
+		array('\OCA\Files_Sharing\API\Local', 'createShare'),
 		'files_sharing');
 
 OC_API::register('get',
 		'/apps/files_sharing/api/v1/shares/{id}',
-		array('\OCA\Files\Share\Api', 'getShare'),
+		array('\OCA\Files_Sharing\API\Local', 'getShare'),
 		'files_sharing');
 
 OC_API::register('put',
 		'/apps/files_sharing/api/v1/shares/{id}',
-		array('\OCA\Files\Share\Api', 'updateShare'),
+		array('\OCA\Files_Sharing\API\Local', 'updateShare'),
 		'files_sharing');
 
 OC_API::register('delete',
 		'/apps/files_sharing/api/v1/shares/{id}',
-		array('\OCA\Files\Share\Api', 'deleteShare'),
+		array('\OCA\Files_Sharing\API\Local', 'deleteShare'),
 		'files_sharing');
diff --git a/apps/files_sharing/appinfo/version b/apps/files_sharing/appinfo/version
index be14282b7ff..7d8568351b4 100644
--- a/apps/files_sharing/appinfo/version
+++ b/apps/files_sharing/appinfo/version
@@ -1 +1 @@
-0.5.3
+0.5.4
diff --git a/apps/files_sharing/lib/activity.php b/apps/files_sharing/lib/activity.php
new file mode 100644
index 00000000000..0f7e8ab9b63
--- /dev/null
+++ b/apps/files_sharing/lib/activity.php
@@ -0,0 +1,165 @@
+<?php
+/**
+ * ownCloud - publish activities
+ *
+ * @copyright (c) 2014, ownCloud Inc.
+ *
+ * @author Bjoern Schiessle <schiessle@owncloud.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace OCA\Files_Sharing;
+
+class Activity implements \OCP\Activity\IExtension {
+
+	const TYPE_REMOTE_SHARE = 'remote_share';
+	const SUBJECT_REMOTE_SHARE_RECEIVED = 'remote_share_received';
+	const SUBJECT_REMOTE_SHARE_ACCEPTED = 'remote_share_accepted';
+	const SUBJECT_REMOTE_SHARE_DECLINED = 'remote_share_declined';
+	const SUBJECT_REMOTE_SHARE_UNSHARED = 'remote_share_unshared';
+
+	/**
+	 * The extension can return an array of additional notification types.
+	 * If no additional types are to be added false is to be returned
+	 *
+	 * @param string $languageCode
+	 * @return array|false
+	 */
+	public function getNotificationTypes($languageCode) {
+		$l = \OC::$server->getL10N('files_sharing', $languageCode);
+		return array(self::TYPE_REMOTE_SHARE => $l->t('A file or folder was shared from <strong>another server</strong>'));
+	}
+
+	/**
+	 * The extension can filter the types based on the filter if required.
+	 * In case no filter is to be applied false is to be returned unchanged.
+	 *
+	 * @param array $types
+	 * @param string $filter
+	 * @return array|false
+	 */
+	public function filterNotificationTypes($types, $filter) {
+		return $types;
+	}
+
+	/**
+	 * For a given method additional types to be displayed in the settings can be returned.
+	 * In case no additional types are to be added false is to be returned.
+	 *
+	 * @param string $method
+	 * @return array|false
+	 */
+	public function getDefaultTypes($method) {
+		if ($method === 'stream') {
+			return array(self::TYPE_REMOTE_SHARE);
+		}
+
+		return false;
+	}
+
+	/**
+	 * The extension can translate a given message to the requested languages.
+	 * If no translation is available false is to be returned.
+	 *
+	 * @param string $app
+	 * @param string $text
+	 * @param array $params
+	 * @param boolean $stripPath
+	 * @param boolean $highlightParams
+	 * @param string $languageCode
+	 * @return string|false
+	 */
+	public function translate($app, $text, $params, $stripPath, $highlightParams, $languageCode) {
+
+		$l = \OC::$server->getL10N('files_sharing', $languageCode);
+
+		if (!$text) {
+			return '';
+		}
+
+		if ($app === 'files_sharing') {
+			switch ($text) {
+				case self::SUBJECT_REMOTE_SHARE_RECEIVED:
+					return $l->t('You received a new remote share from %s', $params)->__toString();
+				case self::SUBJECT_REMOTE_SHARE_ACCEPTED:
+					return $l->t('%1$s accepted remote share <strong>%2$s</strong>', $params)->__toString();
+				case self::SUBJECT_REMOTE_SHARE_DECLINED:
+					return $l->t('%1$s declined remote share <strong>%2$s</strong>', $params)->__toString();
+					case self::SUBJECT_REMOTE_SHARE_UNSHARED:
+					return $l->t('%1$s unshared <strong>%2$s</strong>', $params)->__toString();
+			}
+		}
+	}
+
+	/**
+	 * A string naming the css class for the icon to be used can be returned.
+	 * If no icon is known for the given type false is to be returned.
+	 *
+	 * @param string $type
+	 * @return string|false
+	 */
+	public function getTypeIcon($type) {
+		return 'icon-share';
+	}
+
+	/**
+	 * The extension can define the parameter grouping by returning the index as integer.
+	 * In case no grouping is required false is to be returned.
+	 *
+	 * @param array $activity
+	 * @return integer|false
+	 */
+	public function getGroupParameter($activity) {
+		return false;
+	}
+
+	/**
+	 * The extension can define additional navigation entries. The array returned has to contain two keys 'top'
+	 * and 'apps' which hold arrays with the relevant entries.
+	 * If no further entries are to be added false is no be returned.
+	 *
+	 * @return array|false
+	 */
+	public function getNavigation() {
+		return false;
+	}
+
+	/**
+	 * The extension can check if a customer filter (given by a query string like filter=abc) is valid or not.
+	 *
+	 * @param string $filterValue
+	 * @return boolean
+	 */
+	public function isFilterValid($filterValue) {
+		return false;
+	}
+
+	/**
+	 * For a given filter the extension can specify the sql query conditions including parameters for that query.
+	 * In case the extension does not know the filter false is to be returned.
+	 * The query condition and the parameters are to be returned as array with two elements.
+	 * E.g. return array('`app` = ? and `message` like ?', array('mail', 'ownCloud%'));
+	 *
+	 * @param string $filter
+	 * @return array|false
+	 */
+	public function getQueryForFilter($filter) {
+		if ($filter === 'shares') {
+			return array('`app` = ? and `type` = ?', array('files_sharing', self::TYPE_REMOTE_SHARE));
+		}
+		return false;
+	}
+
+}
diff --git a/apps/files_sharing/lib/external/manager.php b/apps/files_sharing/lib/external/manager.php
index 8176302a86a..3b5483a5108 100644
--- a/apps/files_sharing/lib/external/manager.php
+++ b/apps/files_sharing/lib/external/manager.php
@@ -50,14 +50,8 @@ class Manager {
 	public function addShare($remote, $token, $password, $name, $owner) {
 		$user = $this->userSession->getUser();
 		if ($user) {
-			$query = $this->connection->prepare('
-				INSERT INTO `*PREFIX*share_external`
-					(`remote`, `share_token`, `password`, `name`, `owner`, `user`, `mountpoint`, `mountpoint_hash`)
-				VALUES (?, ?, ?, ?, ?, ?, ?, ?)
-			');
 			$mountPoint = Filesystem::normalizePath('/' . $name);
-			$hash = md5($mountPoint);
-			$query->execute(array($remote, $token, $password, $name, $owner, $user->getUID(), $mountPoint, $hash));
+			\OCA\Files_Sharing\Helper::addServer2ServerShare($remote, $token, $name, $mountPoint, $owner, $user->getUID(), $password, -1, true);
 
 			$options = array(
 				'remote' => $remote,
@@ -81,9 +75,9 @@ class Manager {
 			$query = $this->connection->prepare('
 				SELECT `remote`, `share_token`, `password`, `mountpoint`, `owner`
 				FROM `*PREFIX*share_external`
-				WHERE `user` = ?
+				WHERE `user` = ? AND `accepted` = ?
 			');
-			$query->execute(array($user->getUID()));
+			$query->execute(array($user->getUID(), 1));
 
 			while ($row = $query->fetch()) {
 				$row['manager'] = $this;
diff --git a/apps/files_sharing/lib/helper.php b/apps/files_sharing/lib/helper.php
index f7204a8db8f..c83debe952f 100644
--- a/apps/files_sharing/lib/helper.php
+++ b/apps/files_sharing/lib/helper.php
@@ -21,6 +21,30 @@ class Helper {
 	}
 
 	/**
+	 * add server-to-server share to database
+	 *
+	 * @param string $remote
+	 * @param string $token
+	 * @param string $name
+	 * @param string $mountPoint
+	 * @param string $owner
+	 * @param string $user
+	 * @param string $password
+	 * @param int $remoteId
+	 * @param bool $accepted
+	 */
+	public static function addServer2ServerShare($remote, $token, $name, $mountPoint, $owner, $user, $password='', $remoteId=-1, $accepted = false) {
+		$accepted = $accepted ? 1 : 0;
+		$query = \OCP\DB::prepare('
+				INSERT INTO `*PREFIX*share_external`
+					(`remote`, `share_token`, `password`, `name`, `owner`, `user`, `mountpoint`, `mountpoint_hash`, `accepted`, `remote_id`)
+				VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+			');
+			$hash = md5($mountPoint);
+			$query->execute(array($remote, $token, $password, $name, $owner, $user, $mountPoint, $hash, $accepted, $remoteId));
+	}
+
+	/**
 	 * Sets up the filesystem and user for public sharing
 	 * @param string $token string share token
 	 * @param string $relativePath optional path relative to the share
diff --git a/apps/files_sharing/tests/api.php b/apps/files_sharing/tests/api.php
index 1259197423b..dd6de15010f 100644
--- a/apps/files_sharing/tests/api.php
+++ b/apps/files_sharing/tests/api.php
@@ -76,7 +76,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_POST['shareWith'] = \Test_Files_Sharing_Api::TEST_FILES_SHARING_API_USER2;
 		$_POST['shareType'] = \OCP\Share::SHARE_TYPE_USER;
 
-		$result = Share\Api::createShare(array());
+		$result = \OCA\Files_Sharing\API\Local::createShare(array());
 
 		$this->assertTrue($result->succeeded());
 		$data = $result->getData();
@@ -93,7 +93,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_POST['path'] = $this->folder;
 		$_POST['shareType'] = \OCP\Share::SHARE_TYPE_LINK;
 
-		$result = Share\Api::createShare(array());
+		$result = \OCA\Files_Sharing\API\Local::createShare(array());
 
 		// check if API call was successful
 		$this->assertTrue($result->succeeded());
@@ -129,7 +129,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_POST['shareType'] = \OCP\Share::SHARE_TYPE_LINK;
 
 
-		$result = Share\Api::createShare(array());
+		$result = \OCA\Files_Sharing\API\Local::createShare(array());
 		$this->assertFalse($result->succeeded());
 
 
@@ -138,7 +138,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_POST['shareType'] = \OCP\Share::SHARE_TYPE_LINK;
 		$_POST['password'] = '';
 
-		$result = Share\Api::createShare(array());
+		$result = \OCA\Files_Sharing\API\Local::createShare(array());
 		$this->assertFalse($result->succeeded());
 
 		// share with password should succeed
@@ -146,7 +146,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_POST['shareType'] = \OCP\Share::SHARE_TYPE_LINK;
 		$_POST['password'] = 'foo';
 
-		$result = Share\Api::createShare(array());
+		$result = \OCA\Files_Sharing\API\Local::createShare(array());
 		$this->assertTrue($result->succeeded());
 
 		$data = $result->getData();
@@ -157,7 +157,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$params['_put'] = array();
 		$params['_put']['password'] = 'bar';
 
-		$result = Share\Api::updateShare($params);
+		$result = \OCA\Files_Sharing\API\Local::updateShare($params);
 		$this->assertTrue($result->succeeded());
 
 		// removing password should fail
@@ -166,7 +166,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$params['_put'] = array();
 		$params['_put']['password'] = '';
 
-		$result = Share\Api::updateShare($params);
+		$result = \OCA\Files_Sharing\API\Local::updateShare($params);
 		$this->assertFalse($result->succeeded());
 
 		// cleanup
@@ -187,7 +187,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_POST['shareWith'] = \Test_Files_Sharing_Api::TEST_FILES_SHARING_API_USER2;
 		$_POST['shareType'] = \OCP\Share::SHARE_TYPE_USER;
 
-		$result = Share\Api::createShare(array());
+		$result = \OCA\Files_Sharing\API\Local::createShare(array());
 
 		$this->assertTrue($result->succeeded());
 		$data = $result->getData();
@@ -213,7 +213,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_POST['shareWith'] = \Test_Files_Sharing_Api::TEST_FILES_SHARING_API_USER2;
 		$_POST['shareType'] = \OCP\Share::SHARE_TYPE_USER;
 
-		$result = Share\Api::createShare(array());
+		$result = \OCA\Files_Sharing\API\Local::createShare(array());
 
 		$this->assertTrue($result->succeeded());
 		$data = $result->getData();
@@ -238,7 +238,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_POST['shareWith'] = \Test_Files_Sharing_Api::TEST_FILES_SHARING_API_USER2;
 		$_POST['shareType'] = \OCP\Share::SHARE_TYPE_USER;
 
-		$result = Share\Api::createShare(array());
+		$result = \OCA\Files_Sharing\API\Local::createShare(array());
 
 		$this->assertFalse($result->succeeded());
 
@@ -259,7 +259,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		\OCP\Share::shareItem('file', $fileinfo['fileid'], \OCP\Share::SHARE_TYPE_USER,
 		\Test_Files_Sharing_Api::TEST_FILES_SHARING_API_USER2, 31);
 
-		$result = Share\Api::getAllShares(array());
+		$result = \OCA\Files_Sharing\API\Local::getAllShares(array());
 
 		$this->assertTrue($result->succeeded());
 
@@ -286,7 +286,7 @@ class Test_Files_Sharing_Api extends TestCase {
 
 		$_GET['path'] = $this->filename;
 
-		$result = Share\Api::getAllShares(array());
+		$result = \OCA\Files_Sharing\API\Local::getAllShares(array());
 
 		$this->assertTrue($result->succeeded());
 
@@ -323,7 +323,7 @@ class Test_Files_Sharing_Api extends TestCase {
 
 		$_GET['path'] = $this->filename;
 
-		$result = Share\Api::getAllShares(array());
+		$result = \OCA\Files_Sharing\API\Local::getAllShares(array());
 
 		$this->assertTrue($result->succeeded());
 
@@ -333,7 +333,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		// now also ask for the reshares
 		$_GET['reshares'] = 'true';
 
-		$result = Share\Api::getAllShares(array());
+		$result = \OCA\Files_Sharing\API\Local::getAllShares(array());
 
 		$this->assertTrue($result->succeeded());
 
@@ -378,7 +378,7 @@ class Test_Files_Sharing_Api extends TestCase {
 
 		// call getShare() with share ID
 		$params = array('id' => $share['id']);
-		$result = Share\Api::getShare($params);
+		$result = \OCA\Files_Sharing\API\Local::getShare($params);
 
 		$this->assertTrue($result->succeeded());
 
@@ -413,7 +413,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_GET['path'] = $this->folder;
 		$_GET['subfiles'] = 'true';
 
-		$result = Share\Api::getAllShares(array());
+		$result = \OCA\Files_Sharing\API\Local::getAllShares(array());
 
 		$this->assertTrue($result->succeeded());
 
@@ -470,7 +470,7 @@ class Test_Files_Sharing_Api extends TestCase {
 			$_GET['path'] = $value['query'];
 			$_GET['subfiles'] = 'true';
 
-			$result = Share\Api::getAllShares(array());
+			$result = \OCA\Files_Sharing\API\Local::getAllShares(array());
 
 			$this->assertTrue($result->succeeded());
 
@@ -521,7 +521,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_GET['path'] = '/';
 		$_GET['subfiles'] = 'true';
 
-		$result = Share\Api::getAllShares(array());
+		$result = \OCA\Files_Sharing\API\Local::getAllShares(array());
 
 		$this->assertTrue($result->succeeded());
 
@@ -583,7 +583,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_GET['path'] = '/';
 		$_GET['subfiles'] = 'true';
 
-		$result = Share\Api::getAllShares(array());
+		$result = \OCA\Files_Sharing\API\Local::getAllShares(array());
 
 		$this->assertTrue($result->succeeded());
 
@@ -652,7 +652,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$expectedPath1 = $this->subfolder;
 		$_GET['path'] = $expectedPath1;
 
-		$result1 = Share\Api::getAllShares(array());
+		$result1 = \OCA\Files_Sharing\API\Local::getAllShares(array());
 
 		$this->assertTrue($result1->succeeded());
 
@@ -664,7 +664,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$expectedPath2 = $this->folder . $this->subfolder;
 		$_GET['path'] = $expectedPath2;
 
-		$result2 = Share\Api::getAllShares(array());
+		$result2 = \OCA\Files_Sharing\API\Local::getAllShares(array());
 
 		$this->assertTrue($result2->succeeded());
 
@@ -734,7 +734,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$_GET['path'] = '/';
 		$_GET['subfiles'] = 'true';
 
-		$result = Share\Api::getAllShares(array());
+		$result = \OCA\Files_Sharing\API\Local::getAllShares(array());
 
 		$this->assertTrue($result->succeeded());
 
@@ -771,7 +771,7 @@ class Test_Files_Sharing_Api extends TestCase {
 
 		$params = array('id' => 0);
 
-		$result = Share\Api::getShare($params);
+		$result = \OCA\Files_Sharing\API\Local::getShare($params);
 
 		$this->assertEquals(404, $result->getStatusCode());
 		$meta = $result->getMeta();
@@ -831,7 +831,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$params['_put'] = array();
 		$params['_put']['permissions'] = 1;
 
-		$result = Share\Api::updateShare($params);
+		$result = \OCA\Files_Sharing\API\Local::updateShare($params);
 
 		$meta = $result->getMeta();
 		$this->assertTrue($result->succeeded(), $meta['message']);
@@ -859,7 +859,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$params['_put'] = array();
 		$params['_put']['password'] = 'foo';
 
-		$result = Share\Api::updateShare($params);
+		$result = \OCA\Files_Sharing\API\Local::updateShare($params);
 
 		$this->assertTrue($result->succeeded());
 
@@ -919,7 +919,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$params['_put'] = array();
 		$params['_put']['publicUpload'] = 'true';
 
-		$result = Share\Api::updateShare($params);
+		$result = \OCA\Files_Sharing\API\Local::updateShare($params);
 
 		$this->assertTrue($result->succeeded());
 
@@ -977,7 +977,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$params['_put'] = array();
 		$params['_put']['expireDate'] = $dateWithinRange->format('Y-m-d');
 
-		$result = Share\Api::updateShare($params);
+		$result = \OCA\Files_Sharing\API\Local::updateShare($params);
 
 		$this->assertTrue($result->succeeded());
 
@@ -995,7 +995,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$params['_put'] = array();
 		$params['_put']['expireDate'] = $dateOutOfRange->format('Y-m-d');
 
-		$result = Share\Api::updateShare($params);
+		$result = \OCA\Files_Sharing\API\Local::updateShare($params);
 
 		$this->assertFalse($result->succeeded());
 
@@ -1033,7 +1033,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$this->assertEquals(2, count($items));
 
 		foreach ($items as $item) {
-			$result = Share\Api::deleteShare(array('id' => $item['id']));
+			$result = \OCA\Files_Sharing\API\Local::deleteShare(array('id' => $item['id']));
 
 			$this->assertTrue($result->succeeded());
 		}
@@ -1072,7 +1072,7 @@ class Test_Files_Sharing_Api extends TestCase {
 		$this->assertEquals(1, count($items));
 
 		$item = reset($items);
-		$result3 = Share\Api::deleteShare(array('id' => $item['id']));
+		$result3 = \OCA\Files_Sharing\API\Local::deleteShare(array('id' => $item['id']));
 
 		$this->assertTrue($result3->succeeded());
 
diff --git a/apps/files_sharing/tests/server2server.php b/apps/files_sharing/tests/server2server.php
new file mode 100644
index 00000000000..7aec0c4951f
--- /dev/null
+++ b/apps/files_sharing/tests/server2server.php
@@ -0,0 +1,102 @@
+<?php
+/**
+ * ownCloud - test server-to-server OCS API
+ *
+ * @copyright (c) ownCloud, Inc.
+ *
+ * @author Bjoern Schiessle <schiessle@owncloud.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+use OCA\Files_Sharing\Tests\TestCase;
+
+/**
+ * Class Test_Files_Sharing_Api
+ */
+class Test_Files_Sharing_S2S_OCS_API extends TestCase {
+
+	const TEST_FOLDER_NAME = '/folder_share_api_test';
+
+	private $s2s;
+
+	protected function setUp() {
+		parent::setUp();
+
+		self::loginHelper(self::TEST_FILES_SHARING_API_USER1);
+		\OCP\Share::registerBackend('test', 'Test_Share_Backend');
+
+		$this->s2s = new \OCA\Files_Sharing\API\Server2Server();
+	}
+
+	protected function tearDown() {
+		$query = \OCP\DB::prepare('DELETE FROM `*PREFIX*share_external`');
+		$query->execute();
+
+		parent::tearDown();
+	}
+
+	/**
+	 * @medium
+	 */
+	function testCreateShare() {
+		// simulate a post request
+		$_POST['remote'] = 'localhost';
+		$_POST['token'] = 'token';
+		$_POST['name'] = 'name';
+		$_POST['owner'] = 'owner';
+		$_POST['shareWith'] = self::TEST_FILES_SHARING_API_USER2;
+		$_POST['remote_id'] = 1;
+
+		$result = $this->s2s->createShare(null);
+
+		$this->assertTrue($result->succeeded());
+
+		$query = \OCP\DB::prepare('SELECT * FROM `*PREFIX*share_external` WHERE `remote_id` = ?');
+		$result = $query->execute(array('1'));
+		$data = $result->fetchRow();
+
+		$this->assertSame('localhost', $data['remote']);
+		$this->assertSame('token', $data['share_token']);
+		$this->assertSame('/name', $data['name']);
+		$this->assertSame('owner', $data['owner']);
+		$this->assertSame(self::TEST_FILES_SHARING_API_USER2, $data['user']);
+		$this->assertSame(1, (int)$data['remote_id']);
+		$this->assertSame(0, (int)$data['accepted']);
+	}
+
+
+	function testDeclineShare() {
+		$dummy = \OCP\DB::prepare('
+			INSERT INTO `*PREFIX*share`
+			(`share_type`, `uid_owner`, `item_type`, `item_source`, `item_target`, `file_source`, `file_target`, `permissions`, `stime`, `token`)
+			VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+			');
+		$dummy->execute(array(\OCP\Share::SHARE_TYPE_REMOTE, self::TEST_FILES_SHARING_API_USER1, 'test', '1', '/1', '1', '/test.txt', '1', time(), 'token'));
+
+		$verify = \OCP\DB::prepare('SELECT * FROM `*PREFIX*share`');
+		$result = $verify->execute();
+		$data = $result->fetchAll();
+		$this->assertSame(1, count($data));
+
+		$_POST['token'] = 'token';
+		$this->s2s->declineShare(array('id' => $data[0]['id']));
+
+		$verify = \OCP\DB::prepare('SELECT * FROM `*PREFIX*share`');
+		$result = $verify->execute();
+		$data = $result->fetchAll();
+		$this->assertEmpty($data);
+	}
+}
diff --git a/lib/private/share/share.php b/lib/private/share/share.php
index c6fd1604ac7..abcd14f6ec2 100644
--- a/lib/private/share/share.php
+++ b/lib/private/share/share.php
@@ -699,18 +699,19 @@ class Share extends \OC\Share\Constants {
 	 * @param string $itemSource
 	 * @param int $shareType SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
 	 * @param string $shareWith User or group the item is being shared with
+	 * @param string $owner owner of the share, if null the current user is used
 	 * @return boolean true on success or false on failure
 	 */
-	public static function unshare($itemType, $itemSource, $shareType, $shareWith) {
+	public static function unshare($itemType, $itemSource, $shareType, $shareWith, $owner = null) {
 
 		// check if it is a valid itemType
 		self::getBackend($itemType);
 
-		$items = self::getItemSharedWithUser($itemType, $itemSource, $shareWith, null, $shareType);
+		$items = self::getItemSharedWithUser($itemType, $itemSource, $shareWith, $owner, $shareType);
 
 		$toDelete = array();
 		$newParent = null;
-		$currentUser = \OC_User::getUser();
+		$currentUser = $owner ? $owner : \OC_User::getUser();
 		foreach ($items as $item) {
 			// delete the item with the expected share_type and owner
 			if ((int)$item['share_type'] === (int)$shareType && $item['uid_owner'] === $currentUser) {
diff --git a/lib/public/share.php b/lib/public/share.php
index b3ece8fab94..60e5a6fd85b 100644
--- a/lib/public/share.php
+++ b/lib/public/share.php
@@ -242,10 +242,11 @@ class Share extends \OC\Share\Constants {
 	 * @param string $itemSource
 	 * @param int $shareType SHARE_TYPE_USER, SHARE_TYPE_GROUP, or SHARE_TYPE_LINK
 	 * @param string $shareWith User or group the item is being shared with
+	 * @param string $owner owner of the share, if null the current user is used
 	 * @return boolean true on success or false on failure
 	 */
-	public static function unshare($itemType, $itemSource, $shareType, $shareWith) {
-		return \OC\Share\Share::unshare($itemType, $itemSource, $shareType, $shareWith);
+	public static function unshare($itemType, $itemSource, $shareType, $shareWith, $owner = null) {
+		return \OC\Share\Share::unshare($itemType, $itemSource, $shareType, $shareWith, $owner);
 	}
 
 	/**
diff --git a/ocs/routes.php b/ocs/routes.php
index 845ee49a46d..567f9ccb23d 100644
--- a/ocs/routes.php
+++ b/ocs/routes.php
@@ -81,3 +81,33 @@ OC_API::register(
 	'core',
 	OC_API::USER_AUTH
 );
+
+// Server-to-Server Sharing
+$s2s = new \OCA\Files_Sharing\API\Server2Server();
+OC_API::register('post',
+		'/cloud/shares',
+		array($s2s, 'createShare'),
+		'files_sharing',
+		OC_API::GUEST_AUTH
+);
+
+OC_API::register('post',
+		'/cloud/shares/{id}/accept',
+		array($s2s, 'acceptShare'),
+		'files_sharing',
+		OC_API::GUEST_AUTH
+);
+
+OC_API::register('post',
+		'/cloud/shares/{id}/decline',
+		array($s2s, 'declineShare'),
+		'files_sharing',
+		OC_API::GUEST_AUTH
+);
+
+OC_API::register('post',
+		'/cloud/shares/{id}/unshare',
+		array($s2s, 'unshare'),
+		'files_sharing',
+		OC_API::GUEST_AUTH
+);