Current File : /home/lightco1/www/lightcolab.com/components/com_jce/editor/libraries/classes/request.php
<?php
/**
* @copyright Copyright (c) 2009-2017 Ryan Demmer. All rights reserved
* @license GNU/GPL 2 or later - http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* JCE is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses
*/
defined('_JEXEC') or die('RESTRICTED');
wfimport('editor.libraries.classes.response');
final class WFRequest extends JObject
{
protected static $instance;
protected $requests = array();
/**
* Constructor activating the default information of the class.
*/
public function __construct()
{
parent::__construct();
}
/**
* Returns a reference to a WFRequest object.
*
* This method must be invoked as:
* <pre> $request = WFRequest::getInstance();</pre>
*
* @return object WFRequest
*/
public static function getInstance()
{
if (!isset(self::$instance)) {
self::$instance = new self();
}
return self::$instance;
}
/**
* Set Request function.
*
* @param array $function An array containing the function and object
*/
public function register($function)
{
$object = new stdClass();
if (is_array($function)) {
$ref = array_shift($function);
$name = array_shift($function);
$object->fn = $name;
$object->ref = $ref;
$this->requests[$name] = $object;
} else {
$object->fn = $function;
$this->requests[$function] = $object;
}
}
private function isRegistered($function)
{
return array_key_exists($function, $this->requests);
}
/**
* Get a request function.
*
* @param string $function
*/
public function getFunction($function)
{
return $this->requests[$function];
}
/**
* Check if the HTTP Request is a WFRequest.
*
* @return bool
*/
private function isRequest()
{
return (isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest') || (isset($_SERVER['CONTENT_TYPE']) && strpos($_SERVER['CONTENT_TYPE'], 'multipart') !== false);
}
public function setRequest($request)
{
return $this->register($request);
}
/**
* Check a request query for bad stuff.
*
* @param array $query
*/
private function checkQuery($query)
{
if (is_string($query)) {
$query = array($query);
}
// check for null byte
foreach ($query as $key => $value) {
if (is_array($value) || is_object($value)) {
return self::checkQuery($value);
}
if (is_array($key)) {
return self::checkQuery($key);
}
if (strpos($key, '\u0000') !== false || strpos($value, '\u0000') !== false) {
JError::raiseError(403, 'RESTRICTED');
}
}
}
/**
* Process an ajax call and return result.
*
* @return string
*/
public function process($array = false)
{
// Check for request forgeries
WFToken::checkToken() or die('Access to this resource is restricted');
if ($this->isRequest() === false) {
return false;
}
// empty arguments
$args = array();
// Joomla Input Filter
$filter = JFilterInput::getInstance();
$json = JRequest::getVar('json', '', 'POST', 'STRING', 2);
$method = JRequest::getWord('method');
// set error handling for requests
JError::setErrorHandling(E_ALL, 'callback', array('WFRequest', 'raiseError'));
// get and encode json data
if ($json) {
// remove slashes
$json = stripslashes($json);
// convert to JSON object
$json = json_decode($json);
}
// get current request id
$id = empty($json->id) ? JRequest::getWord('id') : $json->id;
// create response
$response = new WFResponse($id);
if ($method || $json) {
// set request flag
define('JCE_REQUEST', 1);
// check if valid json object
if (is_object($json)) {
// no function call
if (isset($json->method) === false) {
$response->setError(array('code' => -32600, 'message' => 'Invalid Request'))->send();
}
// get function call
$fn = $json->method;
// clean function
$fn = $filter->clean($fn, 'cmd');
// pass params to input and flatten
if (!empty($json->params)) {
// check query
$this->checkQuery($json->params);
// merge array with args
if (is_array($json->params)) {
$args = array_merge($args, $json->params);
// pass through string or object
} else {
$args[] = $json->params;
}
}
} else {
$fn = $method;
$response->setHeaders(array('Content-type' => 'text/html;charset=UTF-8'));
}
if (empty($fn) || $this->isRegistered($fn) === false) {
$response->setError(array('code' => -32601, 'message' => 'Method not found'))->send();
}
// get method
$request = $this->getFunction($fn);
// create callable function
$callback = array($request->ref, $request->fn);
// check function is callable
if (is_callable($callback) === false) {
$response->setError(array('code' => -32601, 'message' => 'Method not found'))->send();
}
// create empty result
$result = '';
try {
$result = call_user_func_array($callback, (array) $args);
if (is_array($result) && !empty($result['error'])) {
if (is_array($result['error'])) {
$result['error'] = implode("\n", $result['error']);
}
$response->setError(array('message' => $result['error']))->send();
}
} catch (Exception $e) {
$response->setError(array('code' => $e->getCode(), 'message' => $e->getMessage()))->send();
}
$response->setContent($result)->send();
}
// default response
$response->setError(array('code' => -32601, 'message' => 'The server returned an invalid response'))->send();
}
/**
* Format a JError object as a JSON string.
*/
public static function raiseError($error)
{
$data = array();
$data[] = JError::translateErrorLevel($error->get('level')).' '.$error->get('code').': ';
if ($error->get('message')) {
$data[] = $error->get('message');
}
$output = array(
'result' => '',
'error' => true,
'code' => $error->get('code'),
'text' => $data,
);
header('Content-Type: text/json');
header('Content-Encoding: UTF-8');
exit(json_encode($output));
}
}
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