xmlHTTP Error

[tayorolls]

Hi,

I am getting an error while taking feeds for our organization. Apparently that URL was down for a while.

<!-- ****************** Begin News Modules ****************** -->
	<style>
		body {font-family: Verdana, Arial, Helvetica, sans-serif;}
		div.news-header-employee {background-color:#9090f9; font-size: 75%; font-weight: bold; color: #ffffff; padding:2px; text-align:center;}
		div.news-header-industry {background-color:#9090f9; font-size: 75%; font-weight: bold; color: #ffffff; padding:2px; text-align:center;}
	</style>

	<div style="margin:0px 5px 0px 5px">
		<div class="news-header-employee">Company Employee News</div>
		<!--#include virtual="/inc/RSSParser.inc"-->
		<!--#include virtual="/inc/NewsDB_Company.inc"-->
		 Code:  <!--#include virtual="/inc/NewsRSS_Company.inc"--> 		<br />
	

		<div class="news-header-industry">Industry News</div>
		<!--#include virtual="/inc/NewsRSS_Yahoo.inc"-->
		<br />
	</div>
	
<!-- ****************** End News Modules ****************** -->

In the bold line above, in that file:

<script language="JScript" runat="Server">

	// Create XML Object
	var rssURL = "[URL unfurl="true"]http://my.company.com/intranet/feed.jsp?feed=rss/broadcast&pt=intranet/cas&c=e"[/URL]
	var newsCompany = getXMLObject(rssURL);
	
</script>

In case the URL is down, how do I display just a simple text saying that the "No News" instead of causing the entire intranet to crash.

Error I was getting is:

Error Type:
msxml3.dll (0x800C0005)
The system cannot locate the resource specified. 
/inc/RSSParser.inc, line 22

Line 22 in RSSParser.inc is: (In bold)

<script language="JScript" runat="Server">

/*********************************************
CORE XMLHTTPREQUEST OBJECT
Grabs an XML document, and converts it to a XMLDOM 
object so that it can be parsed with DOM methods.
*********************************************/
function getXMLObject(url) {
	var xmlhttp, xmldoc;

	try {
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
	}
	catch (e) {
		try {
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (E) {
			xmlhttp = false;
		}
	}
	xmlhttp.open("GET", url, false);
             xmlhttp.send(null);	//return xmlhttp.ResponseText;

	xmldoc=Server.CreateObject("Microsoft.XMLDOM");
	xmldoc.async=false;
	xmldoc.loadXML(xmlhttp.ResponseText);

	if (xmldoc.parseError.errorCode != 0) {
		Response.Write("<HR>");
		Response.Write("XML Parser Error on Line:");
		Response.Write(xmldoc.parseError.line);
		Response.Write(", Character:");
		Response.Write(xmldoc.parseError.linePos);
		Response.Write("<BR>");
		Response.Write(xmldoc.parseError.srcText);
		Response.Write("<HR>");
	}

	return xmldoc;
}

Thanks.

 

[ChrisHirst]

xmlhttp.status

will return the HTTP response code from the server. If it isn't 200 throw an exception.



Chris.

Indifference will be the downfall of mankind, but who cares?
Woo Hoo! the cobblers kids get new shoes.
People Counting Systems

So long, and thanks for all the fish.

 

[tsuji]

This will make provision on the major sources of error.
[tt]
function getXMLObject(url) {
var xmlhttp, xmldoc;

try {
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
try {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (E) {
[blue]Response.write "Server does not support xmlhttp.<br />"
return new Object(); //caller expecting object return[/blue]
[red]//[/red]xmlhttp = false;
}
}
xmlhttp.open("GET", url, false);
[blue]try {[/blue]
xmlhttp.send(null); //return xmlhttp.ResponseText;
[blue]} catch (e) {
Response.write ("Server cannot locate the resource host.<br />");
Response.write ("error : " + e.number + "<br />");
Response.write ("description : " + e.description + "<br />");
return new Object();
}[/blue]

[blue]if (xmlhttp.status == 200 ||xmlhttp.status == 0) { //in case local to server as well[/blue]

[red]//[/red]xmldoc=Server.CreateObject("Microsoft.XMLDOM");
[blue]xmldoc=new ActiveXObject("Microsoft.XMLDOM");[/blue]
xmldoc.async=false;
xmldoc.loadXML(xmlhttp.ResponseText);

if (xmldoc.parseError.errorCode != 0) {
Response.Write("<HR>");
Response.Write("XML Parser Error on Line:");
Response.Write(xmldoc.parseError.line);
Response.Write(", Character:");
Response.Write(xmldoc.parseError.linePos);
Response.Write("<BR>");
Response.Write(xmldoc.parseError.srcText);
Response.Write("<HR>");
[blue]return new Object();[/blue]
}

[blue]} else {
Response.write ("Server cannot locate the resource.<br />");
Response.write ("xmlhttp status : " + xmlhttp.status + "<br />");
return new Object();
}[/blue]

return xmldoc; [green]//the only place to return without major error[/green]
}
[/tt]
When you capture the return object, newCompany.xml being empty will be symptomatic to error happened one way or another.

 

[tsuji]

Amendment
The corresponding line should be read like this (forgotten parentheses for js).
[tt]Response.write [red]([/red]"Server does not support xmlhttp.<br />"[red]);[/red][/tt]