# File webrick/server.rb, line 44
    def initialize(config={}, default=Config::General)
      @config = default.dup.update(config)
      @status = :Stop
      @config[:Logger] ||= Log::new
      @logger = @config[:Logger]

      @tokens = SizedQueue.new(@config[:MaxClients])
      @config[:MaxClients].times{ @tokens.push(nil) }

      webrickv = WEBrick::VERSION
      rubyv = "#{RUBY_VERSION} (#{RUBY_RELEASE_DATE}) [#{RUBY_PLATFORM}]"
      @logger.info("WEBrick #{webrickv}")
      @logger.info("ruby #{rubyv}")

      @listeners = []
      unless @config[:DoNotListen]
        if @config[:Listen]
          warn(":Listen option is deprecated; use GenericServer#listen")
        end
        listen(@config[:BindAddress], @config[:Port])
        if @config[:Port] == 0
          @config[:Port] = @listeners[0].addr[1]
        end
      end
    end

# File webrick/server.rb, line 70
    def [](key)
      @config[key]
    end

# File webrick/server.rb, line 74
    def listen(address, port)
      @listeners += Utils::create_listeners(address, port, @logger)
    end

# File webrick/ssl.rb, line 86
    def listen(address, port)
      listeners = Utils::create_listeners(address, port, @logger)
      if @config[:SSLEnable]
        unless ssl_context
          @ssl_context = setup_ssl_context(@config)
          @logger.info("\n" + @config[:SSLCertificate].to_text) 
        end
        listeners.collect!{|svr|
          ssvr = ::OpenSSL::SSL::SSLServer.new(svr, ssl_context)
          ssvr.start_immediately = @config[:SSLStartImmediately]
          ssvr
        }
      end
      @listeners += listeners
    end

# File webrick/server.rb, line 138
    def run(sock)
      @logger.fatal "run() must be provided by user."
    end

# File webrick/ssl.rb, line 102
    def setup_ssl_context(config)
      unless config[:SSLCertificate]
        cn = config[:SSLCertName]
        comment = config[:SSLCertComment]
        cert, key = Utils::create_self_signed_cert(1024, cn, comment)
        config[:SSLCertificate] = cert
        config[:SSLPrivateKey] = key
      end
      ctx = OpenSSL::SSL::SSLContext.new
      ctx.key = config[:SSLPrivateKey]
      ctx.cert = config[:SSLCertificate]
      ctx.client_ca = config[:SSLClientCA]
      ctx.extra_chain_cert = config[:SSLExtraChainCert]
      ctx.ca_file = config[:SSLCACertificateFile]
      ctx.ca_path = config[:SSLCACertificatePath]
      ctx.cert_store = config[:SSLCertificateStore]
      ctx.verify_mode = config[:SSLVerifyClient]
      ctx.verify_depth = config[:SSLVerifyDepth]
      ctx.verify_callback = config[:SSLVerifyCallback]
      ctx.timeout = config[:SSLTimeout]
      ctx.options = config[:SSLOptions]
      ctx
    end

# File webrick/server.rb, line 126
    def shutdown
      stop
      @listeners.each{|s|
        if @logger.debug?
          addr = s.addr
          @logger.debug("close TCPSocket(#{addr[2]}, #{addr[1]})")
        end
        s.close
      }
      @listeners.clear
    end

# File webrick/ssl.rb, line 82
    def ssl_context
      @ssl_context ||= nil
    end

# File webrick/server.rb, line 78
    def start(&block)
      raise ServerError, "already started." if @status != :Stop
      server_type = @config[:ServerType] || SimpleServer

      server_type.start{
        @logger.info \
          "#{self.class}#start: pid=#{$$} port=#{@config[:Port]}"
        call_callback(:StartCallback)

        thgroup = ThreadGroup.new
        @status = :Running
        while @status == :Running
          begin
            if svrs = IO.select(@listeners, nil, nil, 2.0)
              svrs[0].each{|svr|
                @tokens.pop          # blocks while no token is there.
                if sock = accept_client(svr)
                  th = start_thread(sock, &block)
                  th[:WEBrickThread] = true
                  thgroup.add(th)
                else
                  @tokens.push(nil)
                end
              }
            end
          rescue Errno::EBADF, IOError => ex
            # if the listening socket was closed in GenericServer#shutdown,
            # IO::select raise it.
          rescue Exception => ex
            msg = "#{ex.class}: #{ex.message}\n\t#{ex.backtrace[0]}"
            @logger.error msg
          end
        end

        @logger.info "going to shutdown ..."
        thgroup.list.each{|th| th.join if th[:WEBrickThread] }
        call_callback(:StopCallback)
        @logger.info "#{self.class}#start done."
        @status = :Stop
      }
    end

# File webrick/server.rb, line 120
    def stop
      if @status == :Running
        @status = :Shutdown
      end
    end