Server doesn't respond to an xmlHTTP request using the get method

Question

I'm doing a project with arduino in which I send different requests to the server (the arduino board) with the method XMLHttprequest and Get from a webpage. Except one of the request the others are used only for sending orders to the server, so I don't expect for an XML response. The other one is a request sent in intervals of 5 seconds for getting different values from the server.

The problem arrives with this last one. Actually the webpage sends the request (because I see it on the browser console and the arduino serial monitor) every 5 seconds, but it doesn't get anything, just the headers of the answer confirming the response but nothing about the XML file. Surprisingly, when I write a normal request using the get method in the browser I get instantly the XML file with the values, and It happens all the time I do that.

I'm going to write the javascript code I'm using on the webpage

setInterval(function tiempo()
{
    var request = new XMLHttpRequest();
    request.onreadystatechange = function()
    {
        if (this.readyState == 4) {
            if (this.status == 200) {
                if (this.responseXML != null) {
//                  extract XML data from XML file (containing switch states and analog value)
                    document.getElementById("input1").innerHTML = this.responseXML.getElementsByTagName('dato')[0].childNodes[0].nodeValue;
                    document.getElementById("input2").innerHTML = this.responseXML.getElementsByTagName('dato')[1].childNodes[0].nodeValue;
                    document.getElementById("input3").innerHTML = this.responseXML.getElementsByTagName('dato')[2].childNodes[0].nodeValue;
                    document.getElementById("input4").innerHTML = this.responseXML.getElementsByTagName('dato')[3].childNodes[0].nodeValue;
                    document.getElementById("input5").innerHTML = this.responseXML.getElementsByTagName('dato')[4].childNodes[0].nodeValue;
                    document.getElementById("input6").innerHTML = this.responseXML.getElementsByTagName('dato')[5].childNodes[0].nodeValue;
                    document.getElementById("input7").innerHTML = this.responseXML.getElementsByTagName('dato')[6].childNodes[0].nodeValue;
                }
            }
        }
    }
    request.open("GET", "URL" + Math.random(), true);
    request.send(null);
}
, 5000);

On the other hand, if I only write in the browser URL , I get the XML without any problem.

One las thing I have to say is that right now I'm using a webpage stored in my computer but before I was using a webpage stored in the arduino (on an SD card) and loaded also through the internet from arduino. The same code in that case worked perfectly. The reason because I changed It is because arduino ethernet is not too fast and It took so much time. With the webpage stored in my computer It goes faster because It only needs to send the orders.

Thanks!!

Answer 1

Finally, I figured out the problem. It is the browser. For any reason only Internet Explorer works correctly with the webpage. Neither firefox nor other web browsers got the xml file. I don't know the reason but I would like to find it.

If someone knows something about I would be glad of trying to resolve the problem.

Thanks!!