As of 2013-06-11, Apache Tomcat version 7.0.41 includes a CORS filter. From the release notes:
This release contains a number of bug fixes and improvements compared to version 7.0.40. The notable changes include:
- Add a Servlet Filter that implements CORS. Patch provided by Mohit Soni.
This was implemented and resolved with bug #55046.
What this means for this CorsFilter project
Since Apache is providing a filter with Tomcat, and I primarily use Tomcat, it's likely that I won't spend much effort on this implementation. I'll maintain pull requests and fix bugs as they are reported, but I'm not promising to do so quickly.
The original author has been keeping his repository up-to-date. If you really want to use this implementation, you should use his.
However, I have written my own implementation from scratch that is much simpler and can be configured via JavaConfig -- https://github.com/jsumners/cors-filter
Take your pick. This repository is officially dead.