GZIP/Deflate compression supports.

Header adds the given response headers to the upcoming `http.ResponseWriter`.

Logger renders the simple HTTP accesses logs for the upcoming http.Handler.

NoCache writes the proper response headers to inform the client side not to cache the response's content.

Static serves as file server for static assets, as convention, the given dir name will be used as the URL prefix.

XSRF serves as Cross-Site Request Forgery protection middleware.