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?? ..
?? auth
?? backports
?? body_proxy.rb(958 B)
?? builder.rb(4.27 KB)
?? cascade.rb(1.34 KB)
?? chunked.rb(1.58 KB)
?? commonlogger.rb(2.28 KB)
?? conditionalget.rb(2.5 KB)
?? config.rb(379 B)
?? content_length.rb(840 B)
?? content_type.rb(670 B)
?? deflater.rb(4.57 KB)
?? directory.rb(4.2 KB)
?? etag.rb(2.11 KB)
?? file.rb(4.09 KB)
?? handler
?? handler.rb(3.24 KB)
?? head.rb(484 B)
?? lint.rb(29.26 KB)
?? lobster.rb(1.97 KB)
?? lock.rb(601 B)
?? logger.rb(357 B)
?? methodoverride.rb(972 B)
?? mime.rb(30.89 KB)
?? mock.rb(5.68 KB)
?? multipart
?? multipart.rb(1.14 KB)
?? nulllogger.rb(951 B)
?? recursive.rb(1.73 KB)
?? reloader.rb(2.97 KB)
?? request.rb(12.45 KB)
?? response.rb(4.33 KB)
?? rewindable_input.rb(3.19 KB)
?? runtime.rb(961 B)
?? sendfile.rb(5.18 KB)
?? server.rb(10.8 KB)
?? session
?? showexceptions.rb(11.7 KB)
?? showstatus.rb(3.46 KB)
?? static.rb(4.87 KB)
?? tempfile_reaper.rb(670 B)
?? urlmap.rb(2.46 KB)
?? utils
?? utils.rb(20.55 KB)

Editing: handler.rb

module Rack
  # *Handlers* connect web servers with Rack.
  #
  # Rack includes Handlers for Thin, WEBrick, FastCGI, CGI, SCGI
  # and LiteSpeed.
  #
  # Handlers usually are activated by calling <tt>MyHandler.run(myapp)</tt>.
  # A second optional hash can be passed to include server-specific
  # configuration.
  module Handler
    def self.get(server)
      return unless server
      server = server.to_s

unless @handlers.include? server
        load_error = try_require('rack/handler', server)
      end

if klass = @handlers[server]
        klass.split("::").inject(Object) { |o, x| o.const_get(x) }
      else
        const_get(server)
      end

rescue NameError => name_error
      raise load_error || name_error
    end

# Select first available Rack handler given an `Array` of server names.
    # Raises `LoadError` if no handler was found.
    #
    #   > pick ['thin', 'webrick']
    #   => Rack::Handler::WEBrick
    def self.pick(server_names)
      server_names = Array(server_names)
      server_names.each do |server_name|
        begin
          return get(server_name.to_s)
        rescue LoadError, NameError
        end
      end

raise LoadError, "Couldn't find handler for: #{server_names.join(', ')}."
    end

def self.default(options = {})
      # Guess.
      if ENV.include?("PHP_FCGI_CHILDREN")
        # We already speak FastCGI
        options.delete :File
        options.delete :Port

Rack::Handler::FastCGI
      elsif ENV.include?(REQUEST_METHOD)
        Rack::Handler::CGI
      elsif ENV.include?("RACK_HANDLER")
        self.get(ENV["RACK_HANDLER"])
      else
        pick ['thin', 'puma', 'webrick']
      end
    end

# Transforms server-name constants to their canonical form as filenames,
    # then tries to require them but silences the LoadError if not found
    #
    # Naming convention:
    #
    #   Foo # => 'foo'
    #   FooBar # => 'foo_bar.rb'
    #   FooBAR # => 'foobar.rb'
    #   FOObar # => 'foobar.rb'
    #   FOOBAR # => 'foobar.rb'
    #   FooBarBaz # => 'foo_bar_baz.rb'
    def self.try_require(prefix, const_name)
      file = const_name.gsub(/^[A-Z]+/) { |pre| pre.downcase }.
        gsub(/[A-Z]+[^A-Z]/, '_\&').downcase

require(::File.join(prefix, file))
      nil
    rescue LoadError => error
      error
    end

def self.register(server, klass)
      @handlers ||= {}
      @handlers[server.to_s] = klass.to_s
    end

autoload :CGI, "rack/handler/cgi"
    autoload :FastCGI, "rack/handler/fastcgi"
    autoload :Mongrel, "rack/handler/mongrel"
    autoload :EventedMongrel, "rack/handler/evented_mongrel"
    autoload :SwiftipliedMongrel, "rack/handler/swiftiplied_mongrel"
    autoload :WEBrick, "rack/handler/webrick"
    autoload :LSWS, "rack/handler/lsws"
    autoload :SCGI, "rack/handler/scgi"
    autoload :Thin, "rack/handler/thin"

register 'cgi', 'Rack::Handler::CGI'
    register 'fastcgi', 'Rack::Handler::FastCGI'
    register 'mongrel', 'Rack::Handler::Mongrel'
    register 'emongrel', 'Rack::Handler::EventedMongrel'
    register 'smongrel', 'Rack::Handler::SwiftipliedMongrel'
    register 'webrick', 'Rack::Handler::WEBrick'
    register 'lsws', 'Rack::Handler::LSWS'
    register 'scgi', 'Rack::Handler::SCGI'
    register 'thin', 'Rack::Handler::Thin'
  end
end

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Editing: handler.rb

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