Exemplo n.º 1
0
 /**
  * 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;
     }
 }