jquery cannot get response from perl

Question

I want to use jquery to implement ajax response from perl script on the server.But when I use such code, I got nothing. I can get the result from the url in a browser, so I don't know where is wrong.

$(document).ready(function(){
$("button").click(function(){

$.ajax({
  'type': 'GET',
  'url': 'http://XXXX/cgi-bin/XXX.pl?title=dd',
  'async': true,
  'success': function(data) {
        alert(data);
  }
});

});
});

$("button") you mean all button element has this function when clicked or you meant something like $("#button") ? — Bruno Vieira
– Bruno Vieira, Commented Oct 26, 2012 at 23:44
If you use Chrome's Developer Tools - Network Panel, you can review exactly what ajax requests are made, and what the response was developers.google.com/chrome-developer-tools/docs/network — Shad
– Shad, Commented Oct 26, 2012 at 23:46

F. Hauri - Give Up GitHub · Accepted Answer · 2012-10-27 13:07:06Z

2

If url field contain http://server.domain/ and if you try to access a server from a webpage located elswhere than http://server.domain/ (like in your desktop for sample, accessed via file:///), probably you need to add a field Access-control-allow-origin: * in the header sent by your perl CGI:

#!/usr/bin/perl -w

use CGI;
my $q=new CGI;

print $q->header(-type=>"text/plain", -Access_Control_Allow_Origin=>"*")."Answer";

Take care of security considerations...

answered Oct 27, 2012 at 13:07

F. Hauri - Give Up GitHub

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Comments

Beetroot-Beetroot · Accepted Answer · 2012-10-27 00:20:38Z

0

Try running the following diagnostic :

$(document).ready(function(){
    $("button").click(function(){
        alert('click happened');
        $.ajax({
            'type': 'GET',
            'url': 'http://XXXX/cgi-bin/XXX.pl?title=dd',
            'async': true,
            'success': function(data, textStatus, jqXHR) {
                alert('ajax success: ' + [data, textStatus]);
            },
            'error': function(jqXHR, textStatus, errorThrown){
                alert('ajax error: ' + [textStatus, errorThrown]);
            }
        });
    });
});

Somewhere amongst the alerts (or lack of them) you should get a clue as to to what is failing.

answered Oct 27, 2012 at 0:20

Beetroot-Beetroot

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3 Comments

qqibrow Over a year ago

it shows "ajax error: error". when I change the async to false, it shows "[Exception... "Failure" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: code.jquery.com/jquery-1.8.2.js :: <TOP_LEVEL> :: line 8416" data: no]"

qqibrow Over a year ago

is it because what i returned from the perl is an html page with a table?

Beetroot-Beetroot Over a year ago

Ultimately, you will want an HTML fragment (eg just the table) rather than a whole page. But that doesn't explain why you currently get an ajax error. The most likely cause is that you are trying to query a different domain from that of the current page (ie a cross-domain request). If so, then you might like to try this hack which claims to allow cross-domain GET requests. Definitely keep async:false - true is not supported in some browsers.

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