Re: XMLHttpRequest hangs on readyState 3

> I realize this is a mozilla group and the problem I'm having is with IE
> but I've looked around in this group for some time and you guys are
> very sharp.  I hope someone can point me in the right direction.
>
> I'm using the XMLHTTPRequest JavaScript object to fetch updated info
> from the server.
>
> The problem I'm having occurs on Windows 2000/IE 6.  There is a very
> long pause on readyState 3 (close to a minute, maybe more) but it
> eventually gets to readyState 4.  I have no idea why.  The page works
> just fine on Windows XP/IE 6.
>
> There is no delay or hang up on the server side as far as I can tell
> (if we get to readyState 3 is because the server already sent its
> response).
>
> Does anyone know what takes place between readyState 3 and 4 and why
> does this happen on Windows 2000/IE 6 but not on Windows XP/IE 6?
>
> Any input will be greatly appreciated.
>
> Here's the code for illustration purposes.
>
> var xmlobj=null;
> var data=new Array();
>
> function sendRequest(doc)
> {
>    // check for existing requests
>    if( xmlobj != null && xmlobj.readyState != 0 && xmlobj.readyState !=
> 4 )
>    {
>       xmlobj.abort();
>    }
>
>    xmlobj = createXMLHttpRequest(); //my own library function to create
> object
>    xmlobj.onreadystatechange=stateChecker;
>    xmlobj.open('GET',doc,true);
>
>    xmlobj.setRequestHeader("Cache-Control", "no-cache");
>    xmlobj.setRequestHeader("If-Modified-Since", "Wed, 31 Dec 1980
> 00:00:00 GMT");
>    xmlobj.setRequestHeader("Expires", "Wed, 31 Dec 1980 00:00:00 GMT");
>
>    xmlobj.setRequestHeader("Connection", "close");
>
>    xmlobj.send(null);
> }
>
>
> function stateChecker()
> {
>    alert( "stateChecker: xmlobj.readyState = " + xmlobj.readyState );
>
>    if( typeof(xmlobj) != "undefined" && xmlobj != null &&
> xmlobj.readyState == 4 )
>    {
>        if(xmlobj.status == 200)
>        {
>            data=xmlobj.responseText.split('\n');
>            displayData();
>        }
>        else if( xmlobj.status != 0 )
>        {
>            alert("Failed to get response: "+ xmlobj.status + " - " +
> xmlobj.statusText);
>
>        }
>    }
> }
>
> function displayData()
> {
>    //Dynamically re-draw page here.
> }