Features:
1. Verify HTTP request
2. Record HTTP request
3. HTTP request authorization
4. Content management
5. Provide custom HTTP environments for Servlet and JSP web pages: Modify requests and response objects, or modify HTTP sessions. If you can add additional data to the request object to fill in the missing / default parameters. and many more
Filters can be used for any web application, including static content, and request allocation API can only target servlet and JSP
