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<?php
/**
* Simple AJAX library (based on code XAJAX library - http://www.xajaxproject.org)
*
* @version 1.0
* @package JoomlaTune.Framework
* @author Sergey M. Litvinov (smart@joomlatune.ru)
* @copyright (C) 2006-2013 by Sergey M. Litvinov (http://www.joomlatune.ru)
* @license GNU/GPL: http://www.gnu.org/copyleft/gpl.html
*/
defined('_JEXEC') or die;
// Check for double include
if (!defined ('JOOMLATUNE_AJAX'))
{
define ('JOOMLATUNE_AJAX', 1);
class JoomlaTuneAjaxResponse
{
var $aCommands;
var $xml;
var $sEncoding;
function JoomlaTuneAjaxResponse($sEncoding='utf-8')
{
$this->aCommands = array();
$this->sEncoding = $sEncoding;
}
function addCommand($aAttributes, $mData)
{
$aAttributes['d'] = $mData;
$this->aCommands[] = $aAttributes;
}
function addAssign($sTarget,$sAttribute,$sData)
{
$scripts = array();
// small hack to auto execute JavaScript code returned through ajax
if (preg_match('/\<script/', $sData)) {
$regexp = '/<script[^>]+>(.*?)<\/script>/ism';
$matches = array();
preg_match_all($regexp, $sData, $matches);
for ($i = 0, $n = count($matches[0]); $i < $n; $i++) {
if ($matches[1][$i] != '') {
$sData = str_replace($matches[0][$i], '', $sData);
$scripts[] = trim(preg_replace(array('#^<!--#ism', '#\/\/-->$#ism'), '', $matches[1][$i]));
}
}
}
$this->addCommand(array('n'=>'as','t'=>$sTarget,'p'=>$sAttribute),$sData);
if (count($scripts)) {
foreach ($scripts as $script) {
$this->addCommand(array('n'=>'js'),$script);
}
}
return $this;
}
function addScript($sJS)
{
$sJS = str_replace("\n", '\n', $sJS);
$sJS = str_replace("\r", '', $sJS);
$this->addCommand(array('n'=>'js'),$sJS);
return $this;
}
function addAlert($sMsg)
{
$this->addCommand(array('n'=>'al'),$sMsg);
return $this;
}
function getOutput()
{
$output = '';
if (is_array($this->aCommands)) {
$output = JoomlaTuneAjaxResponse::php2js($this->aCommands);
}
if (trim($this->sEncoding)) {
@header('content-type: text/plain; charset="'.$this->sEncoding.'"');
}
return $output;
}
/**
* This function taken from JsHttpRequest library
* JsHttpRequest: PHP backend for JavaScript DHTML loader.
* (C) Dmitry Koterov, http://en.dklab.ru
*
* Convert a PHP scalar, array or hash to JS scalar/array/hash. This function is
* an analog of json_encode(), but it can work with a non-UTF8 input and does not
* analyze the passed data. Output format must be fully JSON compatible.
*
* @param mixed $a Any structure to convert to JS.
* @return string JavaScript equivalent structure.
*/
function php2js($a=false)
{
if (is_null($a)) return 'null';
if ($a === false) return 'false';
if ($a === true) return 'true';
if (is_scalar($a)) {
if (is_float($a)) {
$a = str_replace(",", ".", strval($a));
}
// All scalars are converted to strings to avoid indeterminism.
// PHP's "1" and 1 are equal for all PHP operators, but
// JS's "1" and 1 are not. So if we pass "1" or 1 from the PHP backend,
// we should get the same result in the JS frontend (string).
// Character replacements for JSON.
static $jsonReplaces = array(
array("\\", "/", "\n", "\t", "\r", "\b", "\f", '"'),
array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"')
);
return '"' . str_replace($jsonReplaces[0], $jsonReplaces[1], $a) . '"';
}
$isList = true;
for ($i = 0, reset($a); $i < count($a); $i++, next($a)) {
if (key($a) !== $i) {
$isList = false;
break;
}
}
$result = array();
if ($isList) {
foreach ($a as $v) {
$result[] = JoomlaTuneAjaxResponse::php2js($v);
}
return '[ ' . join(', ', $result) . ' ]';
} else {
foreach ($a as $k => $v) {
$k = JoomlaTuneAjaxResponse::php2js($k);
$v = JoomlaTuneAjaxResponse::php2js($v);
$result[] = $k . ': ' . $v;
}
return '{ ' . join(', ', $result) . ' }';
}
}
}
class JoomlaTuneAjax
{
var $aFunctions;
var $aObjects;
var $aFunctionRequestTypes;
var $sRequestURI;
var $sEncoding;
function JoomlaTuneAjax($sRequestURI="",$sEncoding='utf-8')
{
$this->aFunctions = array();
$this->aFunctionRequestTypes = array();
$this->aObjects = array();
$this->aFunctionIncludeFiles = array();
$this->sRequestURI = $sRequestURI;
if ($this->sRequestURI == "") {
$this->sRequestURI = $this->_detectURI();
}
$this->setCharEncoding($sEncoding);
}
function setCharEncoding($sEncoding)
{
$this->sEncoding = $sEncoding;
}
function registerFunction($mFunction,$sRequestType=1)
{
if (is_array($mFunction)) {
$this->aFunctions[$mFunction[0]] = 1;
$this->aFunctionRequestTypes[$mFunction[0]] = $sRequestType;
$this->aObjects[$mFunction[0]] = array_slice($mFunction, 1);
} else {
$this->aFunctions[$mFunction] = 1;
$this->aFunctionRequestTypes[$mFunction] = $sRequestType;
}
}
function processRequest()
{
return $this->processRequests();
}
function _isObjectCallback($sFunction)
{
if (array_key_exists($sFunction, $this->aObjects)) {
return true;
}
return false;
}
function _callFunction($sFunction, $aArgs)
{
if ($this->_isObjectCallback($sFunction)) {
$mReturn = call_user_func_array($this->aObjects[$sFunction], $aArgs);
} else if (array_key_exists($sFunction, $this->aFunctions)) {
$mReturn = call_user_func_array($sFunction, $aArgs);
}
return $mReturn;
}
function processRequests()
{
$sFunctionName = $_REQUEST["jtxf"];
$aArgs = isset($_REQUEST["jtxa"]) ? $_REQUEST["jtxa"] : array();
if (!array_key_exists($sFunctionName, $this->aFunctions)) {
$oResponse = new JoomlaTuneAjaxResponse();
$oResponse->addAlert("Unknown Function $sFunctionName.");
} else {
$oResponse = $this->_callFunction($sFunctionName, $aArgs);
}
@header('content-type: text/plain; charset="'.$this->sEncoding.'"');
print $oResponse->getOutput();
exit();
}
function _detectURI() {
$aURL = array();
// Try to get the request URL
if (!empty($_SERVER['REQUEST_URI'])) {
$_SERVER['REQUEST_URI'] = str_replace(array('"',"'",'<','>'), array('%22','%27','%3C','%3E'), $_SERVER['REQUEST_URI']);
$aURL = parse_url($_SERVER['REQUEST_URI']);
}
// Fill in the empty values
if (empty($aURL['scheme'])) {
if (!empty($_SERVER['HTTP_SCHEME'])) {
$aURL['scheme'] = $_SERVER['HTTP_SCHEME'];
} else {
$aURL['scheme'] = (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off') ? 'https' : 'http';
}
}
if (empty($aURL['host'])) {
if (!empty($_SERVER['HTTP_X_FORWARDED_HOST'])) {
if (strpos($_SERVER['HTTP_X_FORWARDED_HOST'], ':') > 0) {
list($aURL['host'], $aURL['port']) = explode(':', $_SERVER['HTTP_X_FORWARDED_HOST']);
} else {
$aURL['host'] = $_SERVER['HTTP_X_FORWARDED_HOST'];
}
} else if (!empty($_SERVER['HTTP_HOST'])) {
if (strpos($_SERVER['HTTP_HOST'], ':') > 0) {
list($aURL['host'], $aURL['port']) = explode(':', $_SERVER['HTTP_HOST']);
} else {
$aURL['host'] = $_SERVER['HTTP_HOST'];
}
} else if (!empty($_SERVER['SERVER_NAME'])) {
$aURL['host'] = $_SERVER['SERVER_NAME'];
} else {
print "Error: ajax failed to automatically identify your Request URI.";
print "Please set the Request URI explicitly when you instantiate the jtajax object.";
exit();
}
}
if (empty($aURL['port']) && !empty($_SERVER['SERVER_PORT'])) {
$aURL['port'] = $_SERVER['SERVER_PORT'];
}
if (empty($aURL['path'])) {
if (!empty($_SERVER['PATH_INFO'])) {
$sPath = parse_url($_SERVER['PATH_INFO']);
} else {
$sPath = parse_url($_SERVER['PHP_SELF']);
}
$aURL['path'] = str_replace(array('"',"'",'<','>'), array('%22','%27','%3C','%3E'), $sPath['path']);
unset($sPath);
}
if (!empty($aURL['query'])) {
$aURL['query'] = '?'.$aURL['query'];
}
// Build the URL: Start with scheme, user and pass
$sURL = $aURL['scheme'].'://';
if (!empty($aURL['user'])) {
$sURL.= $aURL['user'];
if (!empty($aURL['pass'])) {
$sURL.= ':'.$aURL['pass'];
}
$sURL.= '@';
}
// Add the host
$sURL.= $aURL['host'];
// Add the port if needed
if (!empty($aURL['port']) && (($aURL['scheme'] == 'http' && $aURL['port'] != 80) || ($aURL['scheme'] == 'https' && $aURL['port'] != 443))) {
$sURL.= ':'.$aURL['port'];
}
// Add the path and the query string
$sURL.= $aURL['path'].@$aURL['query'];
// Clean up
unset($aURL);
return $sURL;
}
}
} // end of double include check