1 files changed, 85 insertions, 0 deletions
diff --git a/apps/files_sharing/ajax/publicpreview.php b/apps/files_sharing/ajax/publicpreview.php
new file mode 100644
index 00000000000..41a1c178a48
--- /dev/null
+++ b/apps/files_sharing/ajax/publicpreview.php
@@ -0,0 +1,85 @@
+<?php
+/**
+ * Copyright (c) 2013 Georg Ehrke georg@ownCloud.com
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+if(!\OC_App::isEnabled('files_sharing')){
+	exit;
+}
+
+$file = array_key_exists('file', $_GET) ? (string) urldecode($_GET['file']) : '';
+$maxX = array_key_exists('x', $_GET) ? (int) $_GET['x'] : '36';
+$maxY = array_key_exists('y', $_GET) ? (int) $_GET['y'] : '36';
+$scalingUp = array_key_exists('scalingup', $_GET) ? (bool) $_GET['scalingup'] : true;
+$token = array_key_exists('t', $_GET) ? (string) $_GET['t'] : '';
+
+if($token === ''){
+	\OC_Response::setStatus(400); //400 Bad Request
+	\OC_Log::write('core-preview', 'No token parameter was passed', \OC_Log::DEBUG);
+	exit;
+}
+
+$linkedItem = \OCP\Share::getShareByToken($token);
+if($linkedItem === false || ($linkedItem['item_type'] !== 'file' && $linkedItem['item_type'] !== 'folder')) {
+	\OC_Response::setStatus(404);
+	\OC_Log::write('core-preview', 'Passed token parameter is not valid', \OC_Log::DEBUG);
+	exit;
+}
+
+if(!isset($linkedItem['uid_owner']) || !isset($linkedItem['file_source'])) {
+	\OC_Response::setStatus(500);
+	\OC_Log::write('core-preview', 'Passed token seems to be valid, but it does not contain all necessary information . ("' . $token . '")', \OC_Log::WARN);
+	exit;
+}
+
+$userId = $linkedItem['uid_owner'];
+\OC_Util::setupFS($userId);
+
+$pathId = $linkedItem['file_source'];
+$path = \OC\Files\Filesystem::getPath($pathId);
+$pathInfo = \OC\Files\Filesystem::getFileInfo($path);
+$sharedFile = null;
+
+if($linkedItem['item_type'] === 'folder') {
+	$isvalid = \OC\Files\Filesystem::isValidPath($file);
+	if(!$isvalid) {
+		\OC_Response::setStatus(400); //400 Bad Request
+		\OC_Log::write('core-preview', 'Passed filename is not valid, might be malicious (file:"' . $file . '";ip:"' . $_SERVER['REMOTE_ADDR'] . '")', \OC_Log::WARN);
+		exit;
+	}
+	$sharedFile = \OC\Files\Filesystem::normalizePath($file);
+}
+
+if($linkedItem['item_type'] === 'file') {
+	$parent = $pathInfo['parent'];
+	$path = \OC\Files\Filesystem::getPath($parent);
+	$sharedFile = $pathInfo['name'];
+}
+
+$path = \OC\Files\Filesystem::normalizePath($path, false);
+if(substr($path, 0, 1) === '/') {
+	$path = substr($path, 1);
+}
+
+if($maxX === 0 || $maxY === 0) {
+	\OC_Response::setStatus(400); //400 Bad Request
+	\OC_Log::write('core-preview', 'x and/or y set to 0', \OC_Log::DEBUG);
+	exit;
+}
+
+$root = 'files/' . $path;
+
+try{
+	$preview = new \OC\Preview($userId, $root);
+	$preview->setFile($sharedFile);
+	$preview->setMaxX($maxX);
+	$preview->setMaxY($maxY);
+	$preview->setScalingUp($scalingUp);
+
+	$preview->show();
+} catch (\Exception $e) {
+	\OC_Response::setStatus(500);
+	\OC_Log::write('core', $e->getmessage(), \OC_Log::DEBUG);
+}
+\ No newline at end of file