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Current File : //opt/alt/ruby20/lib64/ruby/gems/2.0.0/gems/rack-1.6.4/lib/rack/handler/cgi.rb

require 'rack/content_length'
require 'rack/rewindable_input'

module Rack
  module Handler
    class CGI
      def self.run(app, options=nil)
        $stdin.binmode
        serve app
      end

      def self.serve(app)
        env = ENV.to_hash
        env.delete "HTTP_CONTENT_LENGTH"

        env["SCRIPT_NAME"] = ""  if env["SCRIPT_NAME"] == "/"

        env.update({"rack.version" => Rack::VERSION,
                     "rack.input" => Rack::RewindableInput.new($stdin),
                     "rack.errors" => $stderr,

                     "rack.multithread" => false,
                     "rack.multiprocess" => true,
                     "rack.run_once" => true,

                     "rack.url_scheme" => ["yes", "on", "1"].include?(ENV["HTTPS"]) ? "https" : "http"
                   })

        env[QUERY_STRING]   ||= ""
        env["HTTP_VERSION"] ||= env["SERVER_PROTOCOL"]
        env["REQUEST_PATH"] ||= "/"

        status, headers, body = app.call(env)
        begin
          send_headers status, headers
          send_body body
        ensure
          body.close  if body.respond_to? :close
        end
      end

      def self.send_headers(status, headers)
        $stdout.print "Status: #{status}\r\n"
        headers.each { |k, vs|
          vs.split("\n").each { |v|
            $stdout.print "#{k}: #{v}\r\n"
          }
        }
        $stdout.print "\r\n"
        $stdout.flush
      end

      def self.send_body(body)
        body.each { |part|
          $stdout.print part
          $stdout.flush
        }
      end
    end
  end
end