What does .ac extension refer to?

Question

I visited Avis.com, and I notice the web pages have *.ac extension. Not familiar with this type--what language or framework is this? This something Python-related?

Thanks.

Answer 1

Looking at the HTTP headers that are sent by the server when requesting the page http://www.avis.com/car-rental/avisHome/home.ac, I have :

HTTP/1.1 200 OK
Server: Sun-ONE-Web-Server/6.1
Content-Type: text/html; charset=ISO8859_1
Cache-Control: cache
Content-Language: en-US
X-Powered-By: Servlet/2.4 JSP/2.0
Vary: Accept-Encoding
Content-Encoding: gzip
Date: Mon, 05 Apr 2010 12:00:54 GMT
Content-Length: 19701
Connection: keep-alive

So, it doesn't seem to be Python-related ; more like some Java / JSP stuff.

Answer 2

My guess is that it's Struts 1, an old Java web framework that is usually used with the .action suffix, but this isn't fixed, and .ac may be an abbreviation of that.

This is consistent with the server name. Sun ONE 6 is a very old appserver product, long since obsolete, but it's of a similar age to Struts.