* lib/webrick: Add Documentation

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31499 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

12 files changed, 591 insertions, 18 deletions

diff --git a/ChangeLog b/ChangeLog
index 621341cfde..e74aa9d283 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue May 10 09:13:21 2011  Eric Hodel  <drbrain@segment7.net>
+
+	* lib/webrick: Add Documentation
+
 Tue May 10 04:22:09  Eric Hodel  <drbrain@segment7.net>
 
 	* lib/webrick/log.rb: Hide copyright info from ri
diff --git a/lib/webrick.rb b/lib/webrick.rb
index 8fca81bafb..e0395f4944 100644
--- a/lib/webrick.rb
+++ b/lib/webrick.rb
@@ -1,13 +1,205 @@
+##
+# = WEB server toolkit.
 #
-# WEBrick -- WEB server toolkit.
+# 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 servers 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.
+#
+# == Starting an HTTP server
+#
+# To create a new WEBrick::HTTPServer that will listen to connections on port
+# 8000 and serve documents from the current user's public_html folder:
+#
+#   require 'webrick'
+#
+#   root = File.expand_path '~/public_html'
+#   server = WEBrick::HTTPServer.new :Port => 8000, :DocumentRoot => root
+#
+# To run the server you will need to provide a suitable shutdown hook as
+# starting the server blocks the current thread:
+#
+#   trap 'INT' do server.shutdown end
+#
+#   server.start
+#
+# == Custom Behavior
+#
+# The easiest way to have a server perform custom operations is through
+# WEBrick::HTTPServer#mount_proc.  The block given will be called with a
+# WEBrick::HTTPRequest with request info and a WEBrick::HTTPResponse which
+# must be filled in appropriately:
+#
+#   server.mount_proc '/' do |req, res|
+#     res.body = 'Hello, world!'
+#   end
+#
+# Remember that <tt>server.mount_proc</tt> must <tt>server.start</tt>.
+#
+# == Servlets
+#
+# Advanced custom behavior can be obtained through mounting a subclass of
+# WEBrick::HTTPServlet::AbstractServlet.  Servlets provide more modularity
+# when writing an HTTP server than mount_proc allows.  Here is a simple
+# servlet:
+#
+#   class Simple < WEBrick::HTTPServlet::AbstractServlet
+#     def do_GET request, response
+#       status, content_type, body = do_stuff_with request
+#
+#       response.status = 200
+#       response['Content-Type'] = 'text/plain'
+#       response.body = 'Hello, World!'
+#     end
+#   end
+#
+# To initialize the servlet you mount it on the server:
+#
+#   server.mount '/simple', Simple
+#
+# See WEBrick::HTTPServlet::AbstractServlet for more details.
+#
+# == Virtual Hosts
+#
+# A server can act as a virtual host for multiple host names.  After creating
+# the listening host, additional hosts that do not listen can be created and
+# attached as virtual hosts:
+#
+#   server = WEBrick::HTTPServer.new # ...
+#
+#   vhost = WEBrick::HTTPServer.new :ServerName => 'vhost.example',
+#                                   :DoNotListen => true, # ...
+#   vhost.mount '/', ...
+#
+#   server.virtual_host vhost
+#
+# If no +:DocumentRoot+ is provided and no servlets or procs are mounted on the
+# main server it will return 404 for all URLs.
+#
+# == HTTPS
+#
+# To create an HTTPS server you only need to enable SSL and provide an SSL
+# certificate name:
+#
+#   require 'webrick'
+#   require 'webrick/https'
+#
+#   cert_name = [
+#     %w[CN localhost],
+#   ]
+#
+#   server = WEBrick::HTTPServer.new(:Port => 8000,
+#                                    :SSLEnable => true,
+#                                    :SSLCertName => cert_name)
+#
+# This will start the server with a self-generated self-signed certificate.
+# The certificate will be changed every time the server is restarted.
+#
+# To create a server with a pre-determined key and certificate you can provide
+# them:
+#
+#   require 'webrick'
+#   require 'webrick/https'
+#   require 'openssl'
+#
+#   cert = OpenSSL::X509::Certificate.new File.read '/path/to/cert.pem'
+#   pkey = OpenSSL::PKey::RSA.new File.read '/path/to/pkey.pem'
+#
+#   server = WEBrick::HTTPServer.new(:Port => 8000,
+#                                    :SSLEnable => true,
+#                                    :SSLCertificate => cert,
+#                                    :SSLPrivateKey => pkey)
+#
+# == Proxy Server
+#
+# WEBrick can act as a proxy server:
+#
+#   require 'webrick'
+#   require 'webrick/httpproxy'
+#
+#   proxy = WEBrick::HTTPProxyServer.new :Port => 8000
+#
+#   trap 'INT' do proxy.shutdown end
+#
+# Proxies may modifier the content of the response through the
+# +:ProxyContentHandler+ callback which will be invoked with the request and
+# respone after the remote content has been fetched.
+#
+# == WEBrick as a Production Web Server
+#
+# WEBrick can be run as a production server for small loads.
+#
+# === Daemonizing
+#
+# To start a WEBrick server as a daemon simple run WEBrick::Daemon.start
+# before starting the server.
+#
+# === Dropping Permissions
+#
+# WEBrick can be started as one user to gain permission to bind to port 80 or
+# 443 for serving HTTP or HTTPS traffic then can drop these permissions for
+# regular operation.  To listen on all interfaces for HTTP traffic:
+#
+#   sockets = WEBrick::Utils.create_listeners nil, 80
+#
+# Then drop privileges:
+#
+#   WEBrick::Utils.su 'www'
+#
+# Then create a server that does not listen by default:
+#
+#   server = WEBrick::HTTPServer.new :DoNotListen => true, # ...
+#
+# Then overwrite the listening sockets with the port 80 sockets:
+#
+#   server.listeners.replace sockets
+#
+# === Logging
+#
+# WEBrick can separately log server operations and end-user access.  For
+# server operations:
+#
+#   log_file = File.open '/var/log/webrick.log', 'a+'
+#   log = WEBrick::Log.new log_file
+#
+# For user access logging:
+#
+#   access_log = [
+#     [log_file, WEBrick::AccessLog::COMBINED_LOG_FORMAT],
+#   ]
+#
+#   server = WEBrick::HTTPServer.new :Logger => log, :AccessLog => access_log
+#
+# See WEBrick::AccessLog for further log formats.
+#
+# === Log Rotation
+#
+# To rotate logs in WEBrick on a HUP signal (like syslogd can send), open the
+# log file in 'a+' mode (as above) and trap 'HUP' to reopen the log file:
+#
+#   trap 'HUP' do log_file.reopen '/path/to/webrick.log', 'a+'
+#
+# == Copyright
 #
 # Author: IPR -- Internet Programming with Ruby -- writers
+#
 # Copyright (c) 2000 TAKAHASHI Masayoshi, GOTOU YUUZOU
 # Copyright (c) 2002 Internet Programming with Ruby writers. All rights
 # reserved.
-#
+#--
 # $IPR: webrick.rb,v 1.12 2002/10/01 17:16:31 gotoyuzo Exp $
 
+module WEBrick
+end
+
 require 'webrick/compat.rb'
 
 require 'webrick/version.rb'
diff --git a/lib/webrick/accesslog.rb b/lib/webrick/accesslog.rb
index 9a14ae58e5..2b46a805d2 100644
--- a/lib/webrick/accesslog.rb
+++ b/lib/webrick/accesslog.rb
@@ -8,21 +8,90 @@
 # $IPR: accesslog.rb,v 1.1 2002/10/01 17:16:32 gotoyuzo Exp $
 
 module WEBrick
+
+  ##
+  # AccessLog provides logging to various files in various formats.
+  #
+  # Multiple logs may be written to at the same time:
+  #
+  #   access_log = [
+  #     [$stderr, WEBrick::AccessLog::COMMON_LOG_FORMAT],
+  #     [$stderr, WEBrick::AccessLog::REFERER_LOG_FORMAT],
+  #   ]
+  #
+  #   server = WEBrick::HTTPServer.new :AccessLog => access_log
+  #
+  # Custom log formats may be defined.  WEBrick::AccessLog provides a subset
+  # of the formatting from Apache's mod_log_config
+  # http://httpd.apache.org/docs/mod/mod_log_config.html#formats.  See
+  # AccessLog::setup_params for a list of supported options
+
   module AccessLog
+
+    ##
+    # Raised if a parameter such as %e, %i, %o or %n is used without fetching
+    # a specific field.
+
     class AccessLogError < StandardError; end
 
+    ##
+    # The Common Log Format's time format
+
     CLF_TIME_FORMAT     = "[%d/%b/%Y:%H:%M:%S %Z]"
+
+    ##
+    # Common Log Format
+
     COMMON_LOG_FORMAT   = "%h %l %u %t \"%r\" %s %b"
+
+    ##
+    # Short alias for Common Log Format
+
     CLF                 = COMMON_LOG_FORMAT
+
+    ##
+    # Referer Log Format
+
     REFERER_LOG_FORMAT  = "%{Referer}i -> %U"
+
+    ##
+    # User-Agent Log Format
+
     AGENT_LOG_FORMAT    = "%{User-Agent}i"
+
+    ##
+    # Combined Log Format
+
     COMBINED_LOG_FORMAT = "#{CLF} \"%{Referer}i\" \"%{User-agent}i\""
 
     module_function
 
-    # This format specification is a subset of mod_log_config of Apache.
-    #   http://httpd.apache.org/docs/mod/mod_log_config.html#formats
-    def setup_params(config, req, res)
+    # This format specification is a subset of mod_log_config of Apache:
+    #
+    # %a:: Remote IP address
+    # %b:: Total response size
+    # %e{variable}:: Given variable in ENV
+    # %f:: Response filename
+    # %h:: Remote host name
+    # %{header}i:: Given request header
+    # %l:: Remote logname, always "-"
+    # %m:: Request method
+    # %{attr}n:: Given request attribute from <tt>req.attributes</tt>
+    # %{header}o:: Given response header
+    # %p:: Server's request port
+    # %{format}p:: The canonical port of the server serving the request or the
+    #              actual port or the client's actual port.  Valid formats are
+    #              canonical, local or remote.
+    # %q:: Request query string
+    # %r:: First line of the request
+    # %s:: Request status
+    # %t:: Time the request was recieved
+    # %T:: Time taken to process the request
+    # %u:: Remote user from auth
+    # %U:: Unparsed URI
+    # %%:: Literal %
+
+     def setup_params(config, req, res)
       params = Hash.new("")
       params["a"] = req.peeraddr[3]
       params["b"] = res.sent_size
diff --git a/lib/webrick/htmlutils.rb b/lib/webrick/htmlutils.rb
index 01b9d2cc26..ed901f1ce2 100644
--- a/lib/webrick/htmlutils.rb
+++ b/lib/webrick/htmlutils.rb
@@ -11,6 +11,9 @@
 module WEBrick
   module HTMLUtils
 
+    ##
+    # Escapes &, ", > and < in +string+
+
     def escape(string)
       str = string ? string.dup : ""
       str.gsub!(/&/n, '&amp;')
diff --git a/lib/webrick/httpproxy.rb b/lib/webrick/httpproxy.rb
index ce99c55d8f..33ce17b2d4 100644
--- a/lib/webrick/httpproxy.rb
+++ b/lib/webrick/httpproxy.rb
@@ -33,7 +33,24 @@ module WEBrick
     end
   end
 
+  ##
+  # An HTTP Proxy server which proxies GET, HEAD and POST requests.
+
   class HTTPProxyServer < HTTPServer
+
+    ##
+    # Proxy server configurations.  The proxy server handles the following
+    # configuration items in addition to those supported by HTTPServer:
+    #
+    # :ProxyAuthProc:: Called with a request and response to authorize a
+    #                  request
+    # :ProxyVia:: Appended to the via header
+    # :ProxyURI:: The proxy server's URI
+    # :ProxyContentHandler:: Called with a request and resopnse and allows
+    #                        modification of the response
+    # :ProxyTimeout:: Sets the proxy timeouts to 30 seconds for open and 60
+    #                 seconds for read operations
+
     def initialize(config={}, default=Config::HTTP)
       super(config, default)
       c = @config
diff --git a/lib/webrick/httprequest.rb b/lib/webrick/httprequest.rb
index d179995d77..5dda878e99 100644
--- a/lib/webrick/httprequest.rb
+++ b/lib/webrick/httprequest.rb
@@ -15,23 +15,27 @@ require 'webrick/httputils'
 require 'webrick/cookie'
 
 module WEBrick
+
+  ##
+  # An HTTP request.
   class HTTPRequest
+
     BODY_CONTAINABLE_METHODS = [ "POST", "PUT" ]
 
-    # Request line
+    # :section: Request line
     attr_reader :request_line
     attr_reader :request_method, :unparsed_uri, :http_version
 
-    # Request-URI
+    # :section: Request-URI
     attr_reader :request_uri, :path
     attr_accessor :script_name, :path_info, :query_string
 
-    # Header and entity body
+    # :section: Header and entity body
     attr_reader :raw_header, :header, :cookies
     attr_reader :accept, :accept_charset
     attr_reader :accept_encoding, :accept_language
 
-    # Misc
+    # :section:
     attr_accessor :user
     attr_reader :addr, :peeraddr
     attr_reader :attributes
@@ -137,6 +141,9 @@ module WEBrick
       @body.empty? ? nil : @body
     end
 
+    ##
+    # Request query as a Hash
+
     def query
       unless @query
         parse_query()
@@ -144,14 +151,23 @@ module WEBrick
       @query
     end
 
+    ##
+    # The content-length header
+
     def content_length
       return Integer(self['content-length'])
     end
 
+    ##
+    # The content-type header
+
     def content_type
       return self['content-type']
     end
 
+    ##
+    # Retrieves +header_name+
+
     def [](header_name)
       if @header
         value = @header[header_name.downcase]
@@ -159,6 +175,9 @@ module WEBrick
       end
     end
 
+    ##
+    # Iterates over the request headers
+
     def each
       @header.each{|k, v|
         value = @header[k]
@@ -166,31 +185,49 @@ module WEBrick
       }
     end
 
+    ##
+    # The host this request is for
+
     def host
       return @forwarded_host || @host
     end
 
+    ##
+    # The port this request is for
+
     def port
       return @forwarded_port || @port
     end
 
+    ##
+    # The server name this request is for
+
     def server_name
       return @forwarded_server || @config[:ServerName]
     end
 
+    ##
+    # The client's IP address
+
     def remote_ip
       return self["client-ip"] || @forwarded_for || @peeraddr[3]
     end
 
+    ##
+    # Is this an SSL request?
+
     def ssl?
       return @request_uri.scheme == "https"
     end
 
+    ##
+    # Should the connection this request was made on be kept alive?
+
     def keep_alive?
       @keep_alive
     end
 
-    def to_s
+    def to_s # :nodoc:
       ret = @request_line.dup
       @raw_header.each{|line| ret << line }
       ret << CRLF
@@ -210,11 +247,11 @@ module WEBrick
       end
     end
 
-    def meta_vars
-      # This method provides the metavariables defined by the revision 3
-      # of ``The WWW Common Gateway Interface Version 1.1''.
-      # (http://Web.Golux.Com/coar/cgi/)
+    # This method provides the metavariables defined by the revision 3
+    # of "The WWW Common Gateway Interface Version 1.1"
+    # http://Web.Golux.Com/coar/cgi/
 
+    def meta_vars
       meta = Hash.new
 
       cl = self["Content-Length"]
diff --git a/lib/webrick/httpresponse.rb b/lib/webrick/httpresponse.rb
index 0c292bed2d..b7c61a2b2f 100644
--- a/lib/webrick/httpresponse.rb
+++ b/lib/webrick/httpresponse.rb
@@ -15,10 +15,17 @@ require 'webrick/httputils'
 require 'webrick/httpstatus'
 
 module WEBrick
+  ##
+  # An HTTP response.
+
   class HTTPResponse
     attr_reader :http_version, :status, :header
     attr_reader :cookies
     attr_accessor :reason_phrase
+
+    ##
+    # Body may be a String or IO subclass.
+
     attr_accessor :body
 
     attr_accessor :request_method, :request_uri, :request_http_version
@@ -26,6 +33,9 @@ module WEBrick
     attr_accessor :keep_alive
     attr_reader :config, :sent_size
 
+    ##
+    # Creates a new HTTP response object
+
     def initialize(config)
       @config = config
       @buffer_size = config[:OutputBufferSize]
@@ -45,57 +55,96 @@ module WEBrick
       @sent_size = 0
     end
 
+    ##
+    # The response's HTTP status line
+
     def status_line
       "HTTP/#@http_version #@status #@reason_phrase #{CRLF}"
     end
 
+    ##
+    # Sets the response's status to the +status+ code
+
     def status=(status)
       @status = status
       @reason_phrase = HTTPStatus::reason_phrase(status)
     end
 
+    ##
+    # Retrieves the response header +field+
+
     def [](field)
       @header[field.downcase]
     end
 
+    ##
+    # Sets the response header +field+ to +value+
+
     def []=(field, value)
       @header[field.downcase] = value.to_s
     end
 
+    ##
+    # The content-length header
+
     def content_length
       if len = self['content-length']
         return Integer(len)
       end
     end
 
+    ##
+    # Sets the content-length header to +len+
+
     def content_length=(len)
       self['content-length'] = len.to_s
     end
 
+    ##
+    # The content-type header
+
     def content_type
       self['content-type']
     end
 
+    ##
+    # Sets the content-type header to +type+
+
     def content_type=(type)
       self['content-type'] = type
     end
 
+    ##
+    # Iterates over each header in the resopnse
+
     def each
-      @header.each{|k, v|  yield(k, v) }
+      @header.each{|field, value|  yield(field, value) }
     end
 
+    ##
+    # Will this response body be returned using chunked transfer-encoding?
+
     def chunked?
       @chunked
     end
 
+    ##
+    # Enables chunked transfer encoding.
+
     def chunked=(val)
       @chunked = val ? true : false
     end
 
+    ##
+    # Will this response's connection be kept alive?
+
     def keep_alive?
       @keep_alive
     end
 
+    ##
+    # Sends the response on +socket+
+
     def send_response(socket)
       begin
         setup_header()
@@ -110,6 +159,9 @@ module WEBrick
       end
     end
 
+    ##
+    # Sets up the headers for sending
+
     def setup_header()
       @reason_phrase    ||= HTTPStatus::reason_phrase(@status)
       @header['server'] ||= @config[:ServerSoftware]
@@ -165,6 +217,9 @@ module WEBrick
       end
     end
 
+    ##
+    # Sends the headers on +socket+
+
     def send_header(socket)
       if @http_version.major > 0
         data = status_line()
@@ -180,6 +235,9 @@ module WEBrick
       end
     end
 
+    ##
+    # Sends the body on +socket+
+
     def send_body(socket)
       case @body
       when IO then send_body_io(socket)
@@ -187,18 +245,28 @@ module WEBrick
       end
     end
 
-    def to_s
+    def to_s # :nodoc:
       ret = ""
       send_response(ret)
       ret
     end
 
+    ##
+    # Redirects to +url+ with a WEBrick::HTTPStatus::Redirect +status+.
+    #
+    # Example:
+    #
+    #   res.set_redirect WEBrick::HTTPStatus::TemporaryRedirect
+
     def set_redirect(status, url)
       @body = "<HTML><A HREF=\"#{url.to_s}\">#{url.to_s}</A>.</HTML>\n"
       @header['location'] = url.to_s
       raise status
     end
 
+    ##
+    # Creates an error page for exception +ex+ with an optional +backtrace+
+
     def set_error(ex, backtrace=false)
       case ex
       when HTTPStatus::Status
diff --git a/lib/webrick/httpserver.rb b/lib/webrick/httpserver.rb
index 929d856a4a..ddf1ac7404 100644
--- a/lib/webrick/httpserver.rb
+++ b/lib/webrick/httpserver.rb
@@ -19,7 +19,28 @@ require 'webrick/accesslog'
 module WEBrick
   class HTTPServerError < ServerError; end
 
+  ##
+  # An HTTP Server
+
   class HTTPServer < ::WEBrick::GenericServer
+    ##
+    # Creates a new HTTP server according to +config+
+    #
+    # An HTTP server uses the following attributes:
+    #
+    # :AccessLog:: An array of access logs.  See WEBrick::AccessLog
+    # :BindAddress:: Local address for the server to bind to
+    # :DocumentRoot:: Root path to serve files from
+    # :DocumentRootOptions:: Options for the default HTTPServlet::FileHandler
+    # :HTTPVersion:: The HTTP version of this server
+    # :Port:: Port to listen on
+    # :RequestCallback:: Called with a request and response before each
+    #                    request is serviced.
+    # :RequestTimeout:: Maximum time to wait between requests
+    # :ServerAlias:: Array of alternate names for this server for virtual
+    #                hosting
+    # :ServerName:: Name for this server for virtual hosting
+
     def initialize(config={}, default=Config::HTTP)
       super(config, default)
       @http_version = HTTPVersion::convert(@config[:HTTPVersion])
@@ -40,6 +61,9 @@ module WEBrick
       @virtual_hosts = Array.new
     end
 
+    ##
+    # Processes requests on +sock+
+
     def run(sock)
       while true
         res = HTTPResponse.new(@config)
@@ -93,6 +117,9 @@ module WEBrick
       end
     end
 
+    ##
+    # Services +req+ and fills in +res+
+
     def service(req, res)
       if req.unparsed_uri == "*"
         if req.request_method == "OPTIONS"
@@ -115,23 +142,37 @@ module WEBrick
       res["allow"] = "GET,HEAD,POST,OPTIONS"
     end
 
+    ##
+    # Mounts +servlet+ on +dir+ passing +options+ to the servlet at creation
+    # time
+
     def mount(dir, servlet, *options)
       @logger.debug(sprintf("%s is mounted on %s.", servlet.inspect, dir))
       @mount_tab[dir] = [ servlet, options ]
     end
 
+    ##
+    # Mounts +proc+ or +block+ on +dir+ and calls it with a
+    # WEBrick::HTTPRequest and WEBrick::HTTPResponse
+
     def mount_proc(dir, proc=nil, &block)
       proc ||= block
       raise HTTPServerError, "must pass a proc or block" unless proc
       mount(dir, HTTPServlet::ProcHandler.new(proc))
     end
 
+    ##
+    # Unmounts +dir+
+
     def unmount(dir)
       @logger.debug(sprintf("unmount %s.", dir))
       @mount_tab.delete(dir)
     end
     alias umount unmount
 
+    ##
+    # Finds a servlet for +path+
+
     def search_servlet(path)
       script_name, path_info = @mount_tab.scan(path)
       servlet, options = @mount_tab[script_name]
@@ -140,6 +181,9 @@ module WEBrick
       end
     end
 
+    ##
+    # Adds +server+ as a virtual host.
+
     def virtual_host(server)
       @virtual_hosts << server
       @virtual_hosts = @virtual_hosts.sort_by{|s|
@@ -151,6 +195,9 @@ module WEBrick
       }
     end
 
+    ##
+    # Finds the appropriate virtual host to handle +req+
+
     def lookup_server(req)
       @virtual_hosts.find{|s|
         (s[:BindAddress].nil? || req.addr[3] == s[:BindAddress]) &&
diff --git a/lib/webrick/httpservlet/abstract.rb b/lib/webrick/httpservlet/abstract.rb
index f8bf14a330..0d5c5ae48d 100644
--- a/lib/webrick/httpservlet/abstract.rb
+++ b/lib/webrick/httpservlet/abstract.rb
@@ -18,17 +18,88 @@ module WEBrick
   module HTTPServlet
     class HTTPServletError < StandardError; end
 
+    ##
+    # AbstractServlet allows HTTP server modules to be reused across multiple
+    # servers and allows encapsulation of functionality.
+    #
+    # By default a servlet will respond to GET, HEAD (through an alias to GET)
+    # and OPTIONS requests.
+    #
+    # By default a new servlet is initialized for every request.  A servlet
+    # instance can be reused by overriding ::get_instance in the
+    # AbstractServlet subclass.
+    #
+    # == A Simple Servlet
+    #
+    #  class Simple < WEBrick::HTTPServlet::AbstractServlet
+    #    def do_GET request, response
+    #      status, content_type, body = do_stuff_with request
+    #
+    #      response.status = status
+    #      response['Content-Type'] = content_type
+    #      response.body = body
+    #    end
+    #
+    #    def do_stuff_with request
+    #      return 200, 'text/plain', 'you got a page'
+    #    end
+    #  end
+    #
+    # This servlet can be mounted on a server at a given path:
+    #
+    #   server.mount '/simple', Simple
+    #
+    # == Servlet Configuration
+    #
+    # Servlets can be configured via initialize.  The first argument is the
+    # HTTP server the servlet is being initialized for.
+    #
+    #  class Configureable < Simple
+    #    def initialize server, color, size
+    #      super server
+    #      @color = color
+    #      @size = size
+    #    end
+    #
+    #    def do_stuff_with request
+    #      content = "<p " \
+    #                %q{style="color: #{@color}; font-size: #{@size}"} \
+    #                ">Hello, World!"
+    #
+    #      return 200, "text/html", content
+    #    end
+    #  end
+    #
+    # This servlet must be provided two arguments at mount time:
+    #
+    #   server.mount '/configurable', Configurable, 'red', '2em'
+
     class AbstractServlet
-      def self.get_instance(config, *options)
-        self.new(config, *options)
+
+      ##
+      # Factory for servlet instances that will handle a request from +server+
+      # using +options+ from the mount point.  By default a new servlet
+      # instance is created for every call.
+
+      def self.get_instance(server, *options)
+        self.new(server, *options)
       end
 
+      ##
+      # Initializes a new servlet for +server+ using +options+ which are
+      # stored as-is in +@options+.  +@logger+ is also provided.
+
       def initialize(server, *options)
         @server = @config = server
         @logger = @server[:Logger]
         @options = options
       end
 
+      ##
+      # Dispatches to a +do_+ method based on +req+ if such a method is
+      # available.  (+do_GET+ for a GET request).  Raises a MethodNotAllowed
+      # exception if the method is not implemented.
+
       def service(req, res)
         method_name = "do_" + req.request_method.gsub(/-/, "_")
         if respond_to?(method_name)
@@ -39,14 +110,23 @@ module WEBrick
         end
       end
 
+      ##
+      # Raises a NotFound exception
+
       def do_GET(req, res)
         raise HTTPStatus::NotFound, "not found."
       end
 
+      ##
+      # Dispatches to do_GET
+
       def do_HEAD(req, res)
         do_GET(req, res)
       end
 
+      ##
+      # Returns the allowed HTTP request methods
+
       def do_OPTIONS(req, res)
         m = self.methods.grep(/\Ado_([A-Z]+)\z/) {$1}
         m.sort!
@@ -55,6 +135,9 @@ module WEBrick
 
       private
 
+      ##
+      # Redirects to a path ending in /
+
       def redirect_to_directory_uri(req, res)
         if req.path[-1] != ?/
           location = WEBrick::HTTPUtils.escape_path(req.path + "/")
diff --git a/lib/webrick/httpservlet/filehandler.rb b/lib/webrick/httpservlet/filehandler.rb
index daad8abd27..263c9fc80f 100644
--- a/lib/webrick/httpservlet/filehandler.rb
+++ b/lib/webrick/httpservlet/filehandler.rb
@@ -125,17 +125,48 @@ module WEBrick
       end
     end
 
+    ##
+    # Serves files from a directory
+
     class FileHandler < AbstractServlet
       HandlerTable = Hash.new
 
+      ##
+      # Allow custom handling of requests for files with +suffix+ by class
+      # +handler+
+
       def self.add_handler(suffix, handler)
         HandlerTable[suffix] = handler
       end
 
+      ##
+      # Remove custom handling of requests for files with +suffix+
+
       def self.remove_handler(suffix)
         HandlerTable.delete(suffix)
       end
 
+      ##
+      # Creates a FileHandler servlet on +server+ that serves files starting
+      # at directory +root+
+      #
+      # If +options+ is a Hash the following keys are allowed:
+      # 
+      # :AcceptableLanguages:: Array of languages allowed for accept-language
+      # :DirectoryCallback:: Allows preprocessing of directory requests
+      # :FancyIndexing:: If true, show an index for directories
+      # :FileCallback:: Allows preprocessing of file requests
+      # :HandlerCallback:: Allows preprocessing of requests
+      # :HandlerTable:: Maps file suffixes to file handlers.
+      #                 DefaultFileHandler is used by default but any servlet
+      #                 can be used.
+      # :NondisclosureName:: Do not show files matching this array of globs
+      # :UserDir:: Directory inside ~user to serve content from for /~user
+      #            requests.  Only works if mounted on /
+      #
+      # If +options+ is true or false then +:FancyIndexing+ is enabled or
+      # disabled respectively.
+      
       def initialize(server, root, options={}, default=Config::FileHandler)
         @config = server.config
         @logger = @config[:Logger]
diff --git a/lib/webrick/log.rb b/lib/webrick/log.rb
index 765599aa5b..fe253e51a2 100644
--- a/lib/webrick/log.rb
+++ b/lib/webrick/log.rb
@@ -9,12 +9,23 @@
 # $IPR: log.rb,v 1.26 2002/10/06 17:06:10 gotoyuzo Exp $
 
 module WEBrick
+
+  ##
+  # A generic logging class
+
   class BasicLog
     # log-level constant
     FATAL, ERROR, WARN, INFO, DEBUG = 1, 2, 3, 4, 5
 
     attr_accessor :level
 
+    ##
+    # Initializes a new logger for +log_file+ that outputs messages at +level+
+    # or higher.  +log_file+ can be a filename, an IO-like object that
+    # responds to #<< or nil which outputs to $stderr.
+    #
+    # If no level is given INFO is chosen by default
+
     def initialize(log_file=nil, level=nil)
       @level = level || INFO
       case log_file
@@ -71,6 +82,9 @@ module WEBrick
     end
   end
 
+  ##
+  # A logging class with timestamps
+
   class Log < BasicLog
     attr_accessor :time_format
 
diff --git a/lib/webrick/server.rb b/lib/webrick/server.rb
index c4d23bd67b..30f4dc3143 100644
--- a/lib/webrick/server.rb
+++ b/lib/webrick/server.rb
@@ -23,7 +23,15 @@ module WEBrick
     end
   end
 
+  ##
+  # A generic module for daemonizing a process
+
   class Daemon
+
+    ##
+    # Performs the standard operations for daemonizing a process.  Runs a
+    # block, if given.
+
     def Daemon.start
       exit!(0) if fork
       Process::setsid