/**
* This is the main communications engine of xajax. The engine handles all
* incoming xajax requests, calls the apporiate PHP functions (or
* class/object methods) and passes the XML responses back to the
* Javascript response handler. If your RequestURI is the same as your Web
* page then this function should be called before any headers or HTML has
* been sent.
*/
function processRequests()
{
$requestMode = -1;
$sFunctionName = "";
$bFoundFunction = true;
$bFunctionIsCatchAll = false;
$sFunctionNameForSpecial = "";
$aArgs = array();
$sPreResponse = "";
$bEndRequest = false;
$requestMode = $this->getRequestMode();
if ($requestMode == -1) {
return;
}
if ($requestMode == XAJAX_POST) {
$sFunctionName = $_POST["xajax"];
if (!empty($_POST["xajaxargs"])) {
$aArgs = $_POST["xajaxargs"];
}
} else {
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");
$sFunctionName = $_GET["xajax"];
if (!empty($_GET["xajaxargs"])) {
$aArgs = $_GET["xajaxargs"];
}
}
// Use xajax error handler if necessary
if ($this->bErrorHandler) {
$GLOBALS['xajaxErrorHandlerText'] = "";
set_error_handler("xajaxErrorHandler");
}
if ($this->sPreFunction) {
if (!$this->_isFunctionCallable($this->sPreFunction)) {
$bFoundFunction = false;
$oResponse = new tx_xajax_response();
$oResponse->addAlert("Unknown Pre-Function " . $this->sPreFunction);
}
}
//include any external dependencies associated with this function name
if (array_key_exists($sFunctionName, $this->aFunctionIncludeFiles)) {
ob_start();
include_once $this->aFunctionIncludeFiles[$sFunctionName];
ob_end_clean();
}
if ($bFoundFunction) {
$sFunctionNameForSpecial = $sFunctionName;
if (!array_key_exists($sFunctionName, $this->aFunctions)) {
if ($this->sCatchAllFunction) {
$sFunctionName = $this->sCatchAllFunction;
$bFunctionIsCatchAll = true;
} else {
$bFoundFunction = false;
$oResponse = new tx_xajax_response();
$oResponse->addAlert("Unknown Function {$sFunctionName}.");
}
}
}
if ($bFoundFunction) {
for ($i = 0; $i < sizeof($aArgs); $i++) {
// If magic quotes is on, then we need to strip the slashes from the args
if (get_magic_quotes_gpc() == 1 && is_string($aArgs[$i])) {
$aArgs[$i] = stripslashes($aArgs[$i]);
}
if (stristr($aArgs[$i], "<xjxobj>") != false) {
$aArgs[$i] = $this->_xmlToArray("xjxobj", $aArgs[$i]);
} else {
if (stristr($aArgs[$i], "<xjxquery>") != false) {
$aArgs[$i] = $this->_xmlToArray("xjxquery", $aArgs[$i]);
} else {
if ($this->bDecodeUTF8Input) {
$aArgs[$i] = $this->_decodeUTF8Data($aArgs[$i]);
}
}
}
}
if ($this->sPreFunction) {
$mPreResponse = $this->_callFunction($this->sPreFunction, array($sFunctionNameForSpecial, $aArgs));
if (is_array($mPreResponse) && $mPreResponse[0] === false) {
$bEndRequest = true;
$sPreResponse = $mPreResponse[1];
} else {
$sPreResponse = $mPreResponse;
}
if ($bEndRequest) {
$oResponse = $sPreResponse;
}
}
if (!$bEndRequest) {
if (!$this->_isFunctionCallable($sFunctionName)) {
$oResponse = new tx_xajax_response();
$oResponse->addAlert("The Registered Function {$sFunctionName} Could Not Be Found.");
} else {
if ($bFunctionIsCatchAll) {
$aArgs = array($sFunctionNameForSpecial, $aArgs);
}
$oResponse = $this->_callFunction($sFunctionName, $aArgs);
}
if (is_string($sResponse)) {
$oResponse = new tx_xajax_response();
$oResponse->addAlert("No XML Response Was Returned By Function {$sFunctionName}.\n\nOutput: " . $oResponse);
} else {
if ($sPreResponse != "") {
$oNewResponse = new tx_xajax_response($this->sEncoding, $this->bOutputEntities);
$oNewResponse->loadXML($sPreResponse);
$oNewResponse->loadXML($oResponse);
$oResponse = $sNewResponse;
}
}
}
}
$sContentHeader = "Content-type: text/xml;";
if ($this->sEncoding && strlen(trim($this->sEncoding)) > 0) {
$sContentHeader .= " charset=" . $this->sEncoding;
}
header($sContentHeader);
if ($this->bErrorHandler && !empty($GLOBALS['xajaxErrorHandlerText'])) {
$oErrorResponse = new tx_xajax_response();
$oErrorResponse->addAlert("** PHP Error Messages: **" . $GLOBALS['xajaxErrorHandlerText']);
if ($this->sLogFile) {
$fH = @fopen($this->sLogFile, "a");
if (!$fH) {
$oErrorResponse->addAlert("** Logging Error **\n\nxajax was unable to write to the error log file:\n" . $this->sLogFile);
} else {
fwrite($fH, "** xajax Error Log - " . strftime("%b %e %Y %I:%M:%S %p") . " **" . $GLOBALS['xajaxErrorHandlerText'] . "\n\n\n");
fclose($fH);
}
}
$oErrorResponse->loadXML($oResponse);
$oResponse = $oErrorResponse;
}
if ($this->bCleanBuffer) {
while (@ob_end_clean()) {
}
}
print $oResponse->getOutput();
if ($this->bErrorHandler) {
restore_error_handler();
}
if ($this->bExitAllowed) {
exit;
}
}