xmlHttpRequest, Connection not working

[zenithwolf]

hmm I keep getting this error in firefox:

Error: [Exception... "Component returned failure code: 0x80040111 (NS_ERROR_NOT_AVAILABLE) [nsIXMLHttpRequest.status]" nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)" location: "JS frame :: myfile :: handleResponse :: line 237" data: no]
Source File: myfile
Line: 237

and an "Unspecified Error" in IE, for the xmlHttpRequest object I am trying to use.

I'm using it elsewhere but this particular instance it doesnt seem to work (while everywhere else in the same .js file it works)

heres the code which works everywhere except in this one case, if anybody has stumbled on such a snag, please post a solution, else if anybody would like to check the source file out, ill email it. thx

function getServings(recipe_name) {
	
  var url="get.jsp?serv_recipe=" + recipe_name;
  xmlHttp.open("GET", url, true);
  xmlHttp.onreadystatechange=handleResponse;
  xmlHttp.send(null);
  
  // handle processed output  
  function handleResponse(){
	if (xmlHttp.status != 200) {
		alert("OMFG");
	}
    if(xmlHttp.readyState == 4 && xmlHttp.status == 200) {
      var getVal = xmlHttp.responseText;
      return getVal;
    }
  }
}

oh and I believe xmlHttpRequest.status is where the problem lies, not so sure though

[rwedge]

Originally Posted by zenithwolf

oh and I believe xmlHttpRequest.status is where the problem lies, not so sure though

To check the response status:

  function handleResponse(){
    if (xmlHttp.readyState == 4) {
         if (xmlHttp.status == 200) {
            var getVal = xmlHttp.responseText;
            return getVal;
          } else {
            alert('Error: ' + xmlHttp.status + '\n' + xmlHttp.statusText);
          }
     }
   }

HTTP status codes

[A1ien51]

Error deals with the status, I talk about how to catch the error here: http://radio.javaranch.com/pascarell...345471027.html

Eric

[zenithwolf]

I tried both the solutions, but to no avail, and Alien51 I'm afraid I fail to understand how merely catching the error will solve it? And I tried to catch it, doesnt work it doesnt even let me access the status of my XHR object, for IE it gives me the unspecified error and for firefox it gives me the crazy thing Alien51 talks about... I still don't understand how I would SOLVE this problem, because as I said before, I used the same structure etc. in a few other functions to get a request to my jsp, and it works in all except this one...

[A1ien51]

Did you do something like this:

var status = "N/A";
var statusText = "N/A";
try{ status = xmlHttp.status;}catch(e){}
try( statusText = xmlHttp.statusText'}catch(e){}
alert(status + "\n" + statusText );

Eric

[zenithwolf]

ok it seems to work in IE now (giving me stupid unspecified errors) when I turn the asynchronous off... I dont understand why it should fail to work if async is off in IE since the response is to be returned immediately like in my other functions...however this doesnt work AT ALL in firefox! need help ASAP. thx

[A1ien51]

ALos catching the error will allow you to see if there actually was anything there.

Do you have Firebug installed? www.getFirebug.com

That will let you inspect the XHR request in more detail and see what comes back from the server.

Eric

[zenithwolf]

hmm thanks, the error check works, but I still don't understand why...and its async again, so the problem is for the most part solved, but I have no idea why this works lol

EDIT: never mind, you answer before I had a chance to ask

EDIT 2: firebug is pretty neat, anyway, quick noob question: why won't it let me appendChild a hidden input field to under a td?

[A1ien51]

what does the code look like and what is the exact error?

Eric

[zenithwolf]

its aight i solved, thanks for your help