AJAX rss not working in firefox

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Views: 1101 | Replies: 2

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Join Date: Jun 2006

Location: College Station, TX

Posts: 35

Reputation: gil857 is an unknown quantity at this point

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gil857

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AJAX rss not working in firefox

Jun 6th, 2008

I am trying to use ajax to display an rss feed. It works fine in IE, but does not work in firefox. Researching, I have heard that firefox has an error that occurs on an asynchronous ajax call. Does anyone know a work around for firefox. Any help much appreciated.

 Help with Code Tags 
 javascript Syntax (Toggle Plain Text) 
<body>
 
<script language="javascript" type="text/javascript">
 
	var xmlHttp;
		try
  			{    			
  			xmlHttp=new XMLHttpRequest();			
  			}
		catch (e)			
  			{  
  			 try
    			{    
    			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");	
    			}
  			catch (e)
    			{    
    			try
      				{      
      				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");      
      				}
    			catch (e)
      				{      
      				alert("No AJAX support!");       		     
      				}    
      			}  
      		}
 
 
	xmlHttp.onreadystatechange=function()
    	{     
    	if(xmlHttp.readyState==4)
      		{
      		var rss_response=xmlHttp.responseText;
 
			try 
	  			{
	  			xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
	  			xmlDoc.async="false";
	  			xmlDoc.loadXML(rss_response);								
	  			}
			catch(e)
	  			{
	  			try 
	  				{
	  				parser=new DOMParser();
	  				xmlDoc=parser.parseFromString(rss_response,"text/xml");	
 
	  				}
	  				catch(e)
	  					{
	  					alert(e.message);  					
	  					}
				}	
 
 
				for (loop=1; loop<=10; loop++)
					{
					document.write("<p><a href=\"" + xmlDoc.getElementsByTagName("link")[loop].childNodes[0].nodeValue + "\">")
					document.write(xmlDoc.getElementsByTagName("title")[loop].childNodes[0].nodeValue)
					document.writeln("</a><br>");					
					document.writeln(xmlDoc.getElementsByTagName("description")[loop].childNodes[0].nodeValue + "</p>");					
					}	
 
      		}
    	}
    var url = "http://www.kbtx.com/home/headlines/index.rss"
  	xmlHttp.open("GET",url,true);
  	xmlHttp.send(null);    
 
 
</script>
 
</body>
<body>

<script language="javascript" type="text/javascript">

	var xmlHttp;
		try
  			{    			
  			xmlHttp=new XMLHttpRequest();			
  			}
		catch (e)			
  			{  
  			 try
    			{    
    			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");	
    			}
  			catch (e)
    			{    
    			try
      				{      
      				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");      
      				}
    			catch (e)
      				{      
      				alert("No AJAX support!");       		     
      				}    
      			}  
      		}
	
     
	xmlHttp.onreadystatechange=function()
    	{     
    	if(xmlHttp.readyState==4)
      		{
      		var rss_response=xmlHttp.responseText;
      		
			try 
	  			{
	  			xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
	  			xmlDoc.async="false";
	  			xmlDoc.loadXML(rss_response);								
	  			}
			catch(e)
	  			{
	  			try 
	  				{
	  				parser=new DOMParser();
	  				xmlDoc=parser.parseFromString(rss_response,"text/xml");	
								
	  				}
	  				catch(e)
	  					{
	  					alert(e.message);  					
	  					}
				}	
				
				
				for (loop=1; loop<=10; loop++)
					{
					document.write("<p><a href=\"" + xmlDoc.getElementsByTagName("link")[loop].childNodes[0].nodeValue + "\">")
					document.write(xmlDoc.getElementsByTagName("title")[loop].childNodes[0].nodeValue)
					document.writeln("</a><br>");					
					document.writeln(xmlDoc.getElementsByTagName("description")[loop].childNodes[0].nodeValue + "</p>");					
					}	
      	
      		}
    	}
    var url = "http://www.kbtx.com/home/headlines/index.rss"
  	xmlHttp.open("GET",url,true);
  	xmlHttp.send(null);    
  	

</script>

</body>

Thanks,

Gil

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Location: New York state

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Code Monkey

Re: AJAX rss not working in firefox

Jun 6th, 2008

It's not a Firefox bug its that you're only coding for IE. Use this to get your request object

 Help with Code Tags 
 javascript Syntax (Toggle Plain Text) 
var XMLHttpFactories = [
	function () {return new XMLHttpRequest()},
	function () {return new ActiveXObject("Msxml2.XMLHTTP")},
	function () {return new ActiveXObject("Msxml3.XMLHTTP")},
	function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];
 
function createXMLHTTPObject() {
	var xmlhttp = false;
	for (var i=0;i<XMLHttpFactories.length;i++) {
		try {
			xmlhttp = XMLHttpFactories[i]();
		}
		catch (e) {
			continue;
		}
		break;
	}
	return xmlhttp;
}
var XMLHttpFactories = [
	function () {return new XMLHttpRequest()},
	function () {return new ActiveXObject("Msxml2.XMLHTTP")},
	function () {return new ActiveXObject("Msxml3.XMLHTTP")},
	function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];

function createXMLHTTPObject() {
	var xmlhttp = false;
	for (var i=0;i<XMLHttpFactories.length;i++) {
		try {
			xmlhttp = XMLHttpFactories[i]();
		}
		catch (e) {
			continue;
		}
		break;
	}
	return xmlhttp;
}

Then just

 Help with Code Tags 
 javascript Syntax (Toggle Plain Text) 
var xmlHttp = createXMLHTTPObject();
var xmlHttp = createXMLHTTPObject();

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N+ o K w++(---) O? !M- V PS+>++ PE+ Y+ PGP !t- 5? X- R tv+
b+>++ DI+ D G++>+++ e+ h+>++ r z+*

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Join Date: Jun 2006

Location: College Station, TX

Posts: 35

Reputation: gil857 is an unknown quantity at this point

Rep Power: 3

Solved Threads: 0

gil857

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Light Poster

Re: AJAX rss not working in firefox

Jun 6th, 2008

Thanks for your answer. However, I've run some tests and it does create the request object in firefox.

This statement creates the firefox obj: xmlHttp=new XMLHttpRequest();

The problem is on the readystate function call. Firefox will not call the function.