SharePoint Cross Domain Request with jQuery

Question

I've been going around in circles for a couple hours now to no avail. I had thought that what I wanted to do was not possible but some threads that I was reading on SO were saying otherwise so I pursued it. I need to GetListItems from a SharePoint list on a different server. I have tried different codes but they all error out. Can someone look at what I have and see if it's wrong or if it's just not possible? I get the Error alert then an xData.ResponseText alert as 'undefined'. Nothing after that. The server where I'm running the code is teams03.intranet.com. Thank you.

    var soapEnv =
        "<soapenv:Envelope xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/'> \
            <soapenv:Body> \
                 <GetListItems xmlns='http://schemas.microsoft.com/sharepoint/soap/'> \
                    <listName>Shared Documents</listName> \
                    <viewFields> \
                        <ViewFields> \
                            <FieldRef Name='Title' /> \
                       </ViewFields> \
                    </viewFields> \
                </GetListItems> \
            </soapenv:Body> \
        </soapenv:Envelope>";

function Result(xData, status) {
    alert(xData.responseText);
    $(xData.responseXML).find("z\\:row").each(function() {
        var title = $(this).attr("ows_Title");
        alert(title);
    });
}

    $.ajax({
        url: "http://teams02.intranet.com/sites/MySite/_vti_bin/Lists.asmx",
        type: "POST",
        dataType: "JSONP",
        crossDomain: true,
        data: soapEnv,
        complete: Result,
        contentType: "text/xml; charset=\"utf-8\"",
 error:function(){
     alert("Error");
 }
    });

Answer 1

regarding jQuery and $.ajax you might be having the following trouble regardless of your settings on the ajax call.

http://api.jquery.com/jQuery.ajax/

From the documentation:

Additional Notes: Due to browser security restrictions, most "Ajax" requests are subject to the same origin policy; the request can not successfully retrieve data from a different domain, subdomain, or protocol. Script and JSONP requests are not subject to the same origin policy restrictions.

Try verifying that you use the correct MIME-type, if the one your using not doesn't work try this one application/json it is the official one for sending JSON, don't know how it will work with JSONP though.

Edit: I just checked your example again, your not sending JSONP your sending XML. And also JSONP doesn't support POST only GET. Here is an example http://www.jquery4u.com/json/jsonp-examples/#.UCdd0p2iPEU

Answer 2

Not sure if we are talking about the same thing or not, but have you seen this?

http://sharepointjavascript.wordpress.com/2010/10/20/convert-a-standard-sharepoint-lookup-column-to-a-full-blown-cross-site-lookup-using-javascript-only/