Save XMLHttpRequest error to JS variable

Question

When trying to access a cross domain site via JQuerys AJAX method Chrome throws an error:

XMLHttpRequest cannot load http://somewebsite.com. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access

I understand CORS and why this occurring. What I am trying to do is save that exact error message into a javascript variable. I can't find anything in the response request error that has that messaging and I am thinking it is unique to the way Chrome handles AJAX requests?

The reason I am asking is because I am attempting to isolate the URL in the message since it is providing me the proper redirected URL form the AJAX. So for example if my AJAX call is hitting "http://somewebsite.com/redirect" the error that is thrown shows the actual redirected url, something like "http://somewebiste.com/trueURL". The true, end point URL is what I am trying to isolate to so I can link to it elsewhere.

Tom R · Accepted Answer · 2015-04-29 00:47:24Z

1

The browser is throwing the error and it is basically telling you that it is preventing you from accessing the resource. So try catching the exception and reading it from there.
EDIT: To clarify, the browser makes it seem to your code as if there was no response to the request. If there is no exception thrown then you are probably out of luck.

edited Apr 29, 2015 at 0:47

answered Apr 29, 2015 at 0:33

Tom R

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