跨子域请求

Question

I need to make a cross subdomain request. There is a classic asp site which create an XMLHttpRequest to my PL/SQL Oracle webpage.

The asp site has the domain: test/site.asp and the PL/SQL webpage has the domain test:7779/site... so the top level domain is the same

This is my XmlHttpRequest:

var xmlHttp = null;
xmlHttp = new XMLHttpRequest();
xmlHttp.onload = function() {
    if (xmlHttp.readyState === 4) {
        if (xmlHttp.status === 200) {
            createChart(divID, xmlHttp.responseText, counter);
        } else {
            console.error("error");
        }
    } 
};

xmlHttp.open( "GET", theUrl);
xmlHttp.setRequestHeader( "pragma", "no-cache" );
xmlHttp.send( null );

No error occurs in IE11, but in Chrome:

XMLHttpRequest cannot load http://test:7779/site
No 'Access-Control-Allow-Origin' header is present on the requested resource. 
Origin 'http://test' is therefore not allowed access.
The response had HTTP status code 501.

Is there a solution to make a cross subdomain request? Maybe with an iframe in my asp site, to get the content?

UPDATE:

I know tried to set the document.domain at both sides to the same: test. But this also didn't solved the problem.

Answer 1

My suggestion is, why dont you use MSXML2.ServerXMLHTTP object, as you have Classic ASP in hand? So that XMLHttp request will be sent from server to server and not from browser.

You can use it like this,

Dim xmlhttp
  Set xmlhttp = Server.CreateObject("MSXML2.ServerXMLHTTP")
  xmlhttp.setTimeouts 30,500,1000,1000
  xmlhttp.Open "GET", "http://yourlink" & time, false
  On Error Resume Next
  xmlhttp.Send
  If Err.Number Then
    getBBstatus = "Could Not Retrieve Data"
    Err.Clear
  Else
    getBBstatus = xmlhttp.ResponseText
   ' Do something with the response here
  End If
  On Error Goto 0
  Set xmlhttp = nothing

Hope it helps, thanks.