Hi,
>From what I recall from a few years back, XMLHttpRequest asynchronous
requests do not work with local files, which I think may be the reason why
ActiveX is used. Maybe check if it is being used on a local page (not
tested), e.g.
xhr: function() {
if (location.protocol !== "file:" && window.XMLHttpRequest &&
window.ActiveXObject)
{
return new XMLHttpRequest();
}
if (window.ActiveXObject) {
try { return new ActiveXObject("Microsoft.XMLHTTP"); }
catch(e) { }
}
if (window.XMLHttpRequest) {
return new XMLHttpRequest();
}
return null;
}
--Sam
2010/1/5 Matt <[email protected]>
> On Dec 31 2009, 1:52 pm, John Resig <[email protected]> wrote:
> > Landed and closed:http://dev.jquery.com/ticket/5735
>
> John, good to see this change in jQuery.
>
> Another ajax area that needs attention is the xhr creation:
>
> // Create the request object; Microsoft failed to properly
> // implement the XMLHttpRequest in IE7, so we use the ActiveXObject
> when it is available
> // This function can be overriden by calling jQuery.ajaxSetup
> xhr: function(){
> return window.ActiveXObject ?
> new ActiveXObject("Microsoft.XMLHTTP") :
> new XMLHttpRequest();
> }
>
>
> 1) What problems exist in IE7 that make you prefer ActiveX?
>
> 2) If an IE user has ActiveX disabled (common for many corporate
> users), this will throw a nasty error like:
> "Automation server can't create object"
> to the user and cause scripts to stop running. This is not good,
> especially if the user has IE>=7 with native XMLHttpRequest that would
> work fine.
>
> Assuming you want to keep ActiveX as the preferred method in IE (I'd
> like to know why) then I suggest:
>
> xhr: function() {
> if (window.ActiveXObject) {
> try { return new ActiveXObject("Microsoft.XMLHTTP"); }
> catch(e) { }
> }
> if (window.XMLHttpRequest) {
> return new XMLHttpRequest();
> }
> return null;
> }
>
> And then later in the ajax() method you need to check to make sure
> that xhr() doesn't return null. If it does, don't try to proceed.
>
> In fact, this should be a feature-test early on, so developers can
> decide whether ajax functionality will even be supported in the user's
> browser. Right now there isn't even a way to check for ajax support
> and degrade gracefully if it doesn't exist.
>
> jQuery.support.ajax = (xhr()!=null);
>
> Hope that helps some more,
>
> Matt Kruse
>
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