/**
  * send response
  * @access public
  *
  */
 function sendResponse()
 {
     $xml =& CKFinder_Connector_Core_Factory::getInstance("Core_Xml");
     $this->_connectorNode =& $xml->getConnectorNode();
     $this->checkConnector();
     if ($this->mustCheckRequest()) {
         $this->checkRequest();
     }
     $resourceTypeName = $this->_currentFolder->getResourceTypeName();
     if (!empty($resourceTypeName)) {
         $this->_connectorNode->addAttribute("resourceType", $this->_currentFolder->getResourceTypeName());
     }
     if ($this->mustAddCurrentFolderNode()) {
         $_currentFolder = new Ckfinder_Connector_Utils_XmlNode("CurrentFolder");
         $this->_connectorNode->addChild($_currentFolder);
         $_currentFolder->addAttribute("path", CKFinder_Connector_Utils_FileSystem::convertToConnectorEncoding($this->_currentFolder->getClientPath()));
         $this->_errorHandler->setCatchAllErros(true);
         $_url = $this->_currentFolder->getUrl();
         $_currentFolder->addAttribute("url", is_null($_url) ? "" : CKFinder_Connector_Utils_FileSystem::convertToConnectorEncoding($_url));
         $this->_errorHandler->setCatchAllErros(false);
         $_currentFolder->addAttribute("acl", $this->_currentFolder->getAclMask());
     }
     $this->buildXml();
     $_oErrorNode =& $xml->getErrorNode();
     $_oErrorNode->addAttribute("number", "0");
     echo $this->_connectorNode->asXML();
     exit;
 }

 function buildXml()
 {
     // A "must have", checking whether the connector is enabled and the basic parameters (like current folder) are safe.
     $this->checkConnector();
     $this->checkRequest();
     // Checking ACL permissions, we're just getting an information about a file, so FILE_VIEW permission seems to be ok.
     if (!$this->_currentFolder->checkAcl(CKFINDER_CONNECTOR_ACL_FILE_VIEW)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_UNAUTHORIZED);
     }
     // Make sure we actually received a file name
     if (!isset($_GET["fileName"])) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_NAME);
     }
     $fileName = CKFinder_Connector_Utils_FileSystem::convertToFilesystemEncoding($_GET["fileName"]);
     $resourceTypeInfo = $this->_currentFolder->getResourceTypeConfig();
     // Use the resource type configuration object to check whether the extension of a file to check is really allowed.
     if (!$resourceTypeInfo->checkExtension($fileName)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_EXTENSION);
     }
     // Make sure that the file name is really ok and has not been sent by a hacker
     if (!CKFinder_Connector_Utils_FileSystem::checkFileName($fileName) || $resourceTypeInfo->checkIsHiddenFile($fileName)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_REQUEST);
     }
     $filePath = CKFinder_Connector_Utils_FileSystem::combinePaths($this->_currentFolder->getServerPath(), $fileName);
     if (!file_exists($filePath) || !is_file($filePath)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_FILE_NOT_FOUND);
     }
     //set session values to be check by process.php upon returning from pixlr.com
     $maketoken = md5(session_id());
     $_SESSION['pixlr']['token'] = substr($maketoken, 0, 16);
     $_SESSION['pixlr']['ImagePath'] = $filePath;
     $_SESSION['pixlr']['clientImagePath'] = $this->_currentFolder->getUrl();
     // ie: /CMSfiles/images/subdirectory/
     $_SESSION['pixlr']['fileName'] = $fileName;
     $_SESSION['pixlr']['return'] = $_SERVER['HTTP_REFERER'];
     $thumbFolder = $this->_currentFolder->getThumbsServerPath();
     $_SESSION['pixlr']['thumbLocation'] = $thumbFolder . $fileName;
     //get the client-side absolute path to the image being edited
     $absolute_filePath = "http://" . $_SERVER['HTTP_HOST'] . $_SESSION['pixlr']['clientImagePath'] . $_SESSION['pixlr']['fileName'];
     //get teh directory this plugin is in so we can return to the process.php script in this folder
     $pluginFolder = dirname(__FILE__);
     //the directory holding this plugin
     //make the directory a client-side absolute URL
     $clientPluginFolder = preg_replace("@" . $_SERVER['DOCUMENT_ROOT'] . "@", "http://" . $_SERVER['HTTP_HOST'], $pluginFolder);
     //parameters to send to pixlr.com
     $pixlr_params = array("referrer" => $_SERVER['HTTP_HOST'], "loc" => "en", "exit" => $_SERVER['HTTP_REFERER'] != "" ? urlencode($_SERVER['HTTP_REFERER']) : "http://www.pixlr.com", "image" => $absolute_filePath, "title" => $fileName, "method" => "GET", "target" => urlencode($clientPluginFolder . "/process.php?token=" . $_SESSION['pixlr']['token']), "locktarget" => "TRUE", "locktitle" => "TRUE", "locktype" => "TRUE", "lockquality" => "80");
     $pixlr_link = "http://www.pixlr.com/editor?";
     foreach ($pixlr_params as $key => $val) {
         $pixlr_link .= $key . "=" . $val . "&";
     }
     $pixlr_link = rtrim($pixlr_link, "&");
     $oNode = new Ckfinder_Connector_Utils_XmlNode("Pixlr");
     $oNode->addAttribute("pixlr_link", $pixlr_link);
     $this->_connectorNode->addChild($oNode);
 }

 function buildXml()
 {
     // A "must have", checking whether the connector is enabled and the basic parameters (like current folder) are safe.
     $this->checkConnector();
     $this->checkRequest();
     // Checking ACL permissions, we're just getting an information about a file, so FILE_VIEW permission seems to be ok.
     if (!$this->_currentFolder->checkAcl(CKFINDER_CONNECTOR_ACL_FILE_VIEW)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_UNAUTHORIZED);
     }
     // Make sure we actually received a file name
     if (!isset($_GET["fileName"])) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_NAME);
     }
     $fileName = CKFinder_Connector_Utils_FileSystem::convertToFilesystemEncoding($_GET["fileName"]);
     $resourceTypeInfo = $this->_currentFolder->getResourceTypeConfig();
     // Use the resource type configuration object to check whether the extension of a file to check is really allowed.
     if (!$resourceTypeInfo->checkExtension($fileName)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_EXTENSION);
     }
     // Make sure that the file name is really ok and has not been sent by a hacker
     if (!CKFinder_Connector_Utils_FileSystem::checkFileName($fileName) || $resourceTypeInfo->checkIsHiddenFile($fileName)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_REQUEST);
     }
     $filePath = CKFinder_Connector_Utils_FileSystem::combinePaths($this->_currentFolder->getServerPath(), $fileName);
     if (!file_exists($filePath) || !is_file($filePath)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_FILE_NOT_FOUND);
     }
     $size = filesize($filePath);
     // *** The main part of this plugin ****
     // Adding a <FileSize> element to the XML response.
     //$oNode = new Ckfinder_Connector_Utils_XmlNode("FileSize");
     //$oNode->addAttribute("size", $size);
     //$this->_connectorNode->addChild($oNode);
     $myNode = new Ckfinder_Connector_Utils_XmlNode("MyMessage");
     $myNode->addAttribute("message", "Hello world!");
     $this->_connectorNode->addChild($myNode);
 }

 /**
  * handle request and build XML
  * @access protected
  *
  */
 function buildXml()
 {
     $this->checkConnector();
     $this->checkRequest();
     if (!$this->_currentFolder->checkAcl(CKFINDER_CONNECTOR_ACL_FILE_VIEW)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_UNAUTHORIZED);
     }
     $resourceTypeInfo = $this->_currentFolder->getResourceTypeConfig();
     if (!isset($_GET["fileName"])) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_NAME);
     }
     $fileName = CKFinder_Connector_Utils_FileSystem::convertToFilesystemEncoding($_GET["fileName"]);
     if (!CKFinder_Connector_Utils_FileSystem::checkFileName($fileName) || $resourceTypeInfo->checkIsHiddenFile($fileName)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_REQUEST);
     }
     if (!$resourceTypeInfo->checkExtension($fileName, false)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_INVALID_REQUEST);
     }
     $filePath = CKFinder_Connector_Utils_FileSystem::combinePaths($this->_currentFolder->getServerPath(), $fileName);
     if (!file_exists($filePath) || !is_file($filePath)) {
         $this->_errorHandler->throwError(CKFINDER_CONNECTOR_ERROR_FILE_NOT_FOUND);
     }
     list($width, $height) = getimagesize($filePath);
     $oNode = new Ckfinder_Connector_Utils_XmlNode("ImageInfo");
     $oNode->addAttribute("width", $width);
     $oNode->addAttribute("height", $height);
     $this->_connectorNode->addChild($oNode);
 }

 /**
  * Send error message to the browser. If error number is set to 1, $text (custom error message) will be displayed
  * Don't call this function directly
  *
  * @access public
  * @param int $number error number
  * @param string $text Custom error message (optional)
  */
 public function raiseError($number, $text = false)
 {
     $this->_errorNode->addAttribute("number", intval($number));
     if (false != $text) {
         $this->_errorNode->addAttribute("text", $text);
     }
     echo $this->_connectorNode->asXML();
 }