troubleshooting help jquery/ajax/json no http response

Question

I have a website uploaded into apache tomcat. The code is shown below this website suppose to retrieve json data from other server. For some reason the other server is not responding as I'm getting the error message "handshake didn't go through". Firebug net panel shows no response header also the apache and the other server are on the same domain. Can you please provide a feedback or clue on how to troubleshoot this? Is there anything with ajax cause it seems it is not sending.

Java script code:

$(document).ready( function(){
    var home_add='http://mywebsite.net:3300/gateway';
    $('#handshake').click(function(){
        alert(" sending json data");
        $.ajax({ /* start ajax function to send data */ 
                url:home_add,
                type:'POST',
                datatype:'json',
                contenttype:'text/json',
                error:function(){ alert("handshake didn't go through")}, 
                /* call disconnect function */
                data:{
                    "supportedConnectionTypes": "long-polling",
                    "channel": "/meta/handshake",
                    "version": "1:0"
                },
                success:function(data){
                    $("p").append(data+"<br/>");
                    alert("sucessful handshake");
                }                    
        })   
    })
});

Firebug time line shows DNS lookup, connecting and waiting there is no sending nor receiving. The request header is the following but there is no response.

Hostmywebsite.net:3300
User-AgentMozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.13) Gecko/20101209 CentOS/3.6-2.el5.centos Firefox/3.6.13 Accepttext/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8
Accept-Languageen-us,en;q=0.5
Accept-Encodinggzip,deflate
Accept-CharsetISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive115
Connectionkeep-alive
Originhttp://127.0.0.1:8080
Access-Control-Request-Me...POST

Brian Ball · Accepted Answer · 2010-12-22 20:23:54Z

1

Are you making an ajax call to a domain other than your domain (i.e. the page is from mydomain.com but the ajax call is to theirdomain.com?) If so, this isn't allowed with straight json, but you can look into jsonp (json with padding)

answered Dec 22, 2010 at 20:23

Brian Ball

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3 Comments

Brian Ball Over a year ago

Something else I noticed. I don't know if this just from your example or if this is the actual code, but dataType and contentType are not cased correctly in what you have above. One of my biggest dislikes of javascript is that it is both interpreted and case-sensitive. Many hours have been lost because of that.

Lava Over a year ago

Hi Brian thanks for the reply I did what you told me but still the same thing :(

Brian Ball Over a year ago

Is the page the ajax coming from served up on a standard port (80 or 443)? Is it possible to have the ajax call go to a standard port? Just wondering if there is some weird issue with using a non-standard port. Also, have you tried this in other browsers, do they work?

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