# File lib/faye/websocket.rb, line 110
    def self.determine_url(env)
      secure = if env.has_key?('HTTP_X_FORWARDED_PROTO')
                 env['HTTP_X_FORWARDED_PROTO'] == 'https'
               else
                 env['HTTP_ORIGIN'] =~ /^https:/i
               end

      scheme = secure ? 'wss:' : 'ws:'
      "#{ scheme }//#{ env['HTTP_HOST'] }#{ env['REQUEST_URI'] }"
    end