WEBrick is an HTTP server toolkit that can be configured as an HTTPS server,
a proxy server, and a virtual-host server.

WEBrick features complete logging of both server operations and HTTP access.

WEBrick supports both basic and digest authentication in addition to
algorithms not in RFC 2617.

A WEBrick server can be composed of multiple WEBrick servers or servlets to
provide differing behavior on a per-host or per-path basis.  WEBrick
includes servlets for handling CGI scripts, ERB pages, Ruby blocks and
directory listings.

WEBrick also includes tools for daemonizing a process and starting a process
at a higher privilege level and dropping permissions.