http-stats:
HTTP/1.1 FlexiCache-Error header field

The FlexiCache-Error field is NOT a standard HTTP header field and may not be supported by all clients.

Common FlexiCache-Error header values:

The non-standard "FlexiCache-Error" header is only sent by:

NOTE: this header may be sent directly by the server software or from some third party application running on that server.

Sample FlexiCache-Error web server response:

HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Content-Length: 3456
FlexiCache-Error: ERR_HTTP_NOT_FOUND 0
Date: Fri, 30 Jul 2010 16:58:34 +0000

<!DOCTYPE html PUBLIC "-//W3C//DTD ...
...
...

Other common HTTP headers

Other less common headers