Error when reading an XML with Javascript from a different server

Question

I am working in an iPhone app in HTML. It needs to retrieve content from an xml stored in a remote server and show its content in a list.

I have already achieved this when the xml file is stored in the same server with this code:

    <body>
        <div id="container"> 
            <div id="header">
                <h1><a href="./">BurgerFast</a></h1>
                <p>Menú</p>
                <div>
                    <div id="nav">
                        <ul>
                            <span id="lista"></span>
                        </ul>
                    </div>
                    <div id="footer">
                        <ul>
                            <li><a href="/assets/cl.png">Acerca de</a></li>
                            <li><a href="/assets/cl.png">Ayuda</a></li>
                        </ul>
                    </div>
                </div>
            </div>
        </div>

        <script type="text/javascript">
        if (window.XMLHttpRequest)
    {// code for IE7+, Firefox, Chrome, Opera, Safari
        xmlhttp=new XMLHttpRequest();
    }
        else
    {// code for IE6, IE5
        xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
        xmlhttp.open("GET","assets/note.xml",false);
        xmlhttp.send();
        xmlDoc=xmlhttp.responseXML;

        var item = xmlDoc.getElementsByTagName("item")

        var myElems = "";
        for(i = 0 ; i < item.length ; i++){
            myElems = myElems + "<li><a>" + item[i].getElementsByTagName("name")[0].childNodes[0].nodeValue + "</li></a>";
        }

        document.getElementById("lista").innerHTML =  myElems;


        </script>

    </body>

So far, no problem. As the file is hosted in the same server works nicely, but I want to be able to load xml from different servers but mine. When I change the line:

xmlhttp.open("GET","assets/note.xml",false);

and leave itlike this:

xmlhttp.open("GET","http://173.236.56.146/~crayonli/xml/note.xml", true);

it tells me everytime the xmldoc is null, I don't get it, it's the same damn xml.

I just cannot see where's my mistake. Can somebody tell?

As John_doe point out you can call Ajax on different server. But you can use jsonp for this en.wikipedia.org/wiki/JSONP — jcubic
– jcubic, Commented Dec 26, 2011 at 11:29

Kris · Accepted Answer · 2011-12-26 12:45:53Z

1

You cannot use XmlHttp across different domains. Cross domains are not supported. For achieving it you can use a proxy mechanism or just google xmlhttp cross domain...

This link might help you more XmlHttp Corss Domain Proxy

answered Dec 26, 2011 at 12:45

Kris

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3 Comments

Ivancho Over a year ago

That explains why I never find an example with cross domains. I really apreciate your help guys.

Kris Over a year ago

If you are satisfied with some answer, its good that you accept it :)

Sean Over a year ago

you CAN use XHR across domains, but only if the server is returning JSONP. if the server only returns XML, then you need to make your own proxy. note: deploying a proxy in php is a lot easier than .NET but mind you, you need to make sure your proxy only talks to 1 server and HTML encodes any GET params etc. to prevent someone exploiting your proxy .. similar post with a PHP proxy answer: stackoverflow.com/questions/11778074/…

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