XMLHttpRequest error SCRIPT10

Question

Hi all I have to connect to an external server to retrieve data. They told me to use their script and I have to modify something because it was wrong. Now I ahve a problem when I try to lunch my request. Return me an error into my internet explorer console

SCRIPT10: The data required for the completion of this operation are not yet available.

This is my javascript page, the problem I think is because the query doesn't finish in time to print my result. How can I print the result when they are ready and don't return me error? I have try to comment all my request and leave only the method "open" but the error return me every time. Why??

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<script type="text/javascript">
var req = null ;
function sendRequest(){
    var urlStr="www.test.it";
    var xmlString="";
    xmlString+="<?xml version='1.0' encoding='UTF-8'?><some xml>";

    createHTTPRequestObject();
    var resp = getResponseText(urlStr+"?"+xmlString,null);

    var xmlDoc;
    xmlDoc = new ActiveXObject('Microsoft.XMLDOM');
    xmlDoc.async = false;

    xmlDoc.loadXML(resp);
    alert(xmlDoc.xml);
}

function createHTTPRequestObject(){
    req=null ;
    var pXmlreq = false ;
    if (window.XMLHttpRequest) {
        pXmlreq = new XMLHttpRequest();
    } 
    else if (window.ActiveXObject) {
        try{
            pXmlreq = new ActiveXObject("Msxml2.XMLHTTP");
        } 
        catch (e1) {
            try{
                pXmlreq = new ActiveXObject("Microsoft.XMLHTTP");
            } 
            catch (e2) {
            }
        }
    }
    req = pXmlreq ;
}

function getResponseText(action,query,method,async,contenttype){
    if(method==null){
        method="POST";
    }
    if(async==null){
        async="true";
    }
    if(contenttype==null){
        contenttype = "application/x-www-form-urlencoded";
    }
    req.open(method,action, async);
    req.setRequestHeader("Content-Type", contenttype);
    if(query){
        req.send(query);
    }else{
        req.send();
    }
    return req.responseText ;
}
</script>
</head>
<body>
<input type="button" name="Request" value="Request" onclick="sendRequest();"/>
<div id="content" />
</body>
</html>

My problem is: I have an error I think this error returns to me because I have to wait the query result ready @Sebas — Alessandro Minoccheri
– Alessandro Minoccheri, Commented Mar 6, 2013 at 14:45
Your query string (xmlString in your case) should be encoded with encodeURIComponent. When does it output that error message? Use breakpoints and step over your code to see where it goes wrong. — Marcel Korpel
– Marcel Korpel, Commented Mar 6, 2013 at 14:52

epascarello · Accepted Answer · 2013-03-06 14:55:06Z

2

You are trying to read the responseText before it is ready. Looks like you are treating a asynchronous call as synchronous. That would be the issue.

answered Mar 6, 2013 at 14:55

epascarello

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7 Comments

Alessandro Minoccheri Over a year ago

ok but if i comment over the open method and leave only it return me the error why? I have only leave the method open I don't understand why

Marcel Korpel Over a year ago

@AlessandroMinoccheri: Your req.responseText is still null when getResponseText finishes.

Alessandro Minoccheri Over a year ago

I have try to comment the response.. the error return me when I call the open method @MarcelKorpel

Marcel Korpel Over a year ago

@AlessandroMinoccheri: Then set a breakpoint and check the values you pass to req.open (is that urlStr variable the correct one?).

Alessandro Minoccheri Over a year ago

yes is correct because if i copyied it into their demo test page it works fine

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