Passing code with a value in a query string appended to the URL in JavaScript/AJAX

Question

I have been looking through different answers to what might be the same question I am asking, and a lot of the solutions have used PHP or JQuery and I have to do this in JavaScript. Here is my problem (and I'm a real noob, so I'm probably doing something really stupid and that's why it's not working).

I am trying to pass 'code' with a value in a query string appended to the URL. Then get the code to write dynamically to the page after. Right now, I'm receiving the error: "Incorrect code submitted". I don't think I am sending the "code" correctly.

I started a jsfiddle too: http://jsfiddle.net/shannongmac/6Z7NR/

Here is my code:

function loadXMLDoc() {
            var xmlhttp;
            if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
            xmlhttp=new XMLHttpRequest();
          }
            else {// code for IE6, IE5
            xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
          }
            xmlhttp.onreadystatechange=function() {
            if (xmlhttp.readyState==4 && xmlhttp.status==200) {
            document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
            }
        }
            xmlhttp.open("GET","http://florence.ccs.uconn.edu/~adepalma/cgi-bin/iskm3120/response.cgi",true);
            xmlhttp.send("yowza");

        function addText() {
        var newParagraph = document.createElement('p');
        newParagraph.textContent = textArea.value;
        document.getElementById("myDiv").insertBefore(newParagraph, H2);
    }
}

The request is not completed due to javascripts same-origin policy ? — adeneo
– adeneo, Commented Nov 16, 2013 at 14:27
I'm just getting: Incorrect code submitted (that is the error in dreamweaver, I should say). It's not doing anything when I load in Chrome to try it. — shannonmac
– shannonmac, Commented Nov 16, 2013 at 14:29
But pasting the url http://florence.ccs.uconn.edu/~adepalma/cgi-bin/iskm3120/response.cgi?name=yowza into the browser it returns "incorrect code", and that's the API, so you're doing something wrong ? — adeneo
– adeneo, Commented Nov 16, 2013 at 14:32
This was the code we were given in the assignment, but I see what you are saying, so if it's not accepting it at all, is the code itself wrong? — shannonmac
– shannonmac, Commented Nov 16, 2013 at 14:34

lucas · Accepted Answer · 2013-11-16 15:11:08Z

1

You have a couple of problems with your code:

You're trying to sent POST data when doing a GET request. Try including your "yowsa" string as part of the url, rather than sending it as POST data. Here's a quick intro to the difference: http://www.w3schools.com/tags/ref_httpmethods.asp
You need to send the correct key with your value. Your commented out code shows that you tried "name=yowza.xmp". It looks like you need "code=yowza". (A bit of clever googling turns up http://florence.ccs.uconn.edu/~adepalma/cgi-bin/iskm3120/response.cgi?code=yowza as the correct request you need to make. I'm not sure if that counts as cheating because I haven't seen the assignment).
Whilst your requests may work in dreamweaver, you're going to face a problem on the real web, because you're making a request to a different domain. Have a look into Cross-Origin Resource Sharing to find out more: http://www.html5rocks.com/en/tutorials/cors/

answered Nov 16, 2013 at 15:11

lucas

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shannonmac Over a year ago

Ok, thank you. fixed the URL and you are correct it works testing it in Dreamweaver, however I still get the same error when I run it through any browser, which is most likely what everyone has said that it is a CORS problem.

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