IE10/IE11 Abort Post Ajax Request After Clearing Cache with error “Network Error 0x2ef3”

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This can be happening due a security certificate issue. If you clear the cache you loose part (if not all) of certificate information.

You can find more information (and a workaround) in http://www.jonnyreeves.co.uk/2013/making-xhr-request-to-https-domains-with-winjs/

Basically it says you must do a GET before your POST request in order to update the certificate information.

I had this problem, an AJAX Post request that returned some JSON would fail, eventually returning abort, with the:

SCRIPT7002: XMLHttpRequest: Network Error 0x2ef3

error in the console. On other browsers (Chrome, Firefox, Safari) the exact same AJAX request was fine.

Further investigation revealed that the response was missing the status code – in this case it should have been 500 internal error.

This was being generated as part of a C# web application using service stack that requires an error code to be explicitly set.

IE seemed to leave the connection open, eventually network layer closed it and it ‘aborted’ the request; despite receiving the content and other headers.

Updating the web application to correctly return the status code fixed the issue.

Perhaps there is an issue with how IE is handling the headers in posts.

Hope this helps someone!

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