I'm making a $.get to call a service 'A'. Service 'A' returns plain text which I display on the page. But sometimes it redirects to service 'B' which returns plain text. But, I'm unable to handle the response text of service 'B'. How do I do that?
A:
If service B is listening at different domain, then such cross-domain AJAX calls are forbidden, unless there is crossdomain.xml file allowing it.
PanJanek
2009-11-26 17:47:46
i'm using jsonp to make cross domain calls ('A' and 'B' return json text in fact)... and 'A' is also on a different domain.
manu1001
2009-11-27 06:15:40
Hmm. Have you tried to trace the requests going from the browser?
PanJanek
2009-11-27 06:46:53
A:
I can not prove, but I hope that this script can guide you to a solution:
you would have to prove your status differences or text on each type of response from "a.php"
$.ajax({
type: "GET",
url: "a.php",
complete: function (XMLHttpRequest, textStatus) {
if (XMLHttpRequest.status!=200) // or responseText
{
var fn = arguments.callee;
var _this = this;
setTimeout(function(){fn.call(_this, XMLHttpRequest, textStatus);}, 200);
}
else
{
//ok
}
}
});
or EDIT:
complete: function xCompleteFunction(XMLHttpRequest, textStatus) {
if (XMLHttpRequest.status!=200) // or responseText
{
var _this = this;
setTimeout(function(){xCompleteFunction.call(_this, XMLHttpRequest, textStatus);}, 200);
}
else
{
//ok
}
}
EDIT II:
redirect.html:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<title></title>
<script type="text/javascript">
$(function(){
$("#senddata").click(function(){
$.ajax({
type: "GET",
url: "a.php",
complete: function xCompleteFunction(XMLHttpRequest, textStatus) {
$("#info").append(""+XMLHttpRequest.status+"<br />"+XMLHttpRequest.responseText+"<br>");
if (XMLHttpRequest.status==301) // or responseText
{
var _this = this;
setTimeout(function(){xCompleteFunction.call(_this, XMLHttpRequest, textStatus);}, 200);
$("#info").append("waiting redirect<br>");
}
else
{
$("#info").append("redirect ok<br>");
}
}
});
});
});
</script>
</head>
<body>
<button id="senddata">send ajax request</button>
<pre id="info"></pre>
</body>
</html>
a.php:
<?php
for($a=0;$a<1000000;$a++)
{
//wait
}
header('Location: b.php');
b.php:
<?php
print "hola mundo";
Important: Status Code Definitions
andres descalzo
2009-11-26 17:50:36
i tried copying this and using but it didn't seem to work. i can't figure out much. could you please explain this code? i'm completely new to javascript.
manu1001
2009-11-27 08:31:14
A:
What is the nature of Service 'A' and 'B'? A neater solution would be to handle the discrepancy server-side. For example, if Service A is a PHP script...
<?php
if(prerequisite for display service A plain text){
echo "service a plain text";
}else{
echo "service b plaint text";
}
?>
Alternatively, if these services are text files, you could have a third file that makes the decision, and includes Service A or B depending. For example, this could be ajax.php, and you would call ajax.php in all cases:
<?php
if(prerequisite for displaying service A plain text){
echo file_get_contents("a.txt");
}else{
echo file_get_contents("b.txt");
}
?>
From what it sounds like, your conditional will be file_exists("a.txt"), but that's just a guess on my part.
Good luck, and comment if you've any questions!
Gausie
2009-11-26 21:31:10
no, that's not how it works.the application is integrated with CAS, so a request for 'A' causes a redirect to CAS which authenticates and then does another redirect to 'A'.i can see the redirects using firebug but not in the handler in jquery.
manu1001
2009-11-27 05:53:56