DZone Snippets: fix code

Simple javascript XHR object with fix for missing onreadystatechange event in Firefox (for synchronous calls)

ChrisBloom7 (Chris Bloom) — Mon, 21 Apr 2008 17:35:19 GMT

This code fixes the issue in Firefox where the onreadystatechange event is not called for synchronous XHR requests. It is based on the XHConn script from http://xkr.us/code/javascript/XHConn/, patched with the fix documented at http://lukav.com/wordpress/2007/04/12/firefox-firebug-and-synchronos-calls-problem/



/** XHConn - Simple XMLHTTP Interface - bfults@gmail.com - 2005-04-08        **

 ** Code licensed under Creative Commons Attribution-ShareAlike License      **

 ** http://creativecommons.org/licenses/by-sa/2.0/                           **/

/**

 * Modified slightly from original to support synchoronous transactions

 * CDB 2007-05-16, 2007-06-05

 */



function XHConn()

{

	var xmlhttp, bComplete = false;

	try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); }

	catch (e) { try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); }

	catch (e) { try { xmlhttp = new XMLHttpRequest(); }

	catch (e) { xmlhttp = false; }}}

	if (!xmlhttp) return null;

	this.connect = function(sURL, sMethod, sVars, fnDone, bAsynch)

	{

		if (!xmlhttp) return false;

		bComplete = false;

		sMethod = sMethod.toUpperCase();



		if (bAsynch == null) bAsynch = true; //treat asynch as an optional argument



		try {

			if (sMethod == "GET")

			{

				xmlhttp.open(sMethod, sURL+"?"+sVars, (bAsynch == true));

				sVars = "";

			}

			else

			{

				xmlhttp.open(sMethod, sURL, (bAsynch == true));

				xmlhttp.setRequestHeader("Method", "POST "+sURL+" HTTP/1.1");

				xmlhttp.setRequestHeader("Content-Type",

					"application/x-www-form-urlencoded");

			}



			xmlhttp.onreadystatechange = function(){

				if (xmlhttp.readyState == 4 && !bComplete)

				{

					bComplete = true;

					fnDone(xmlhttp);

				}

			};

			xmlhttp.send(sVars);



			/**

			 * Firefox <= 2.0.0 doesn't fire onreadystatechange for synchronous requests.

			 * See http://lukav.com/wordpress/2007/04/12/firefox-firebug-and-synchronos-calls-problem/

			 */

			var isGecko = (document.addEventListener) ? true : false;

			try {

				if (!bAsynch && isGecko && xmlhttp.onreadystatechange == null) {

					bComplete = true;

					fnDone(xmlhttp);

					return true;

				}

			}

			catch (e) { return false; }

			/**

			 * End synchronous request patch

			 */

		}

		catch(z) { return false; }

		return true;

	};

	return this;

}

Exception class fix for php 4 //PHP Class

jonasraoni (Jonas Raoni Soares Silva) — Sun, 20 Aug 2006 21:29:55 GMT



if(!class_exists('Exception')){

	class Exception{

		var $_message = '';

		var $_code = 0;

		var $_line = 0;

		var $_file = '';

		var $_trace = null;



		function Exception($message = 'Unknown exception', $code = 0){

			$this->_message = $message;

			$this->_code = $code;

			$this->_trace = debug_backtrace();

			$x = array_shift($this->_trace);

			$this->_file = $x['file'];

			$this->_line = $x['line'];

		}



		function __construct($message = 'Unknown exception', $code = 0){

			$this->Exception($message, $code);

		}



		function getMessage(){

			return $this->_message;

		}

		function getCode(){

			return $this->_code;

		}

		function getFile(){

			return $this->_file;

		}

		function getLine(){

			return $this->_line;

		}

		function getTrace(){

			return $this->_trace;

		}

		function getTraceAsString(){

			$s = '';

			foreach($this->_trace as $i=>$item){

				foreach($item['args'] as $j=>$arg)

					$item['args'][$j] = print_r($arg, true);

				$s .= "#$i " . (isset($item['class']) ? $item['class'] . $item['type'] : '') . $item['function']

				. '(' . implode(', ', $item['args']) . ") at [$item[file]:$item[line]]\n";

			}

			return $s;

		}

		function printStackTace(){

			echo $this->getTraceAsString();

		}

		function toString(){

			return $this->getMessage();

		}

		function __toString(){

			return $this->toString();

		}

	}

}

Array.indexOf fix //JavaScript Function

jonasraoni (Jonas Raoni Soares Silva) — Fri, 18 Aug 2006 06:22:28 GMT

Just an idiot fix to increase the number of my posts =b



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com

[].indexOf || (Array.prototype.indexOf = function(v){

       for(var i = this.length; i-- && this[i] !== v;);

       return i;

});

example





var x = [0,1,2,3];



alert(x.indexOf(2));

alert(x.indexOf(4));

Replace old style PHP tags to new style tags

yoghoyogho () — Thu, 18 May 2006 00:21:11 GMT

Sometimes you have to work with scripts that contain old-style PHP tags. This little snippets fixes those scripts, so they use the new style PHP tags.



find * -type f -exec perl -i -wpe 's/<\?php/<\?/g' {} \;

find * -type f -exec perl -i -wpe 's/<\?/<\?php/g' {} \;