    def read_body(socket, block)
      return unless socket
      if tc = self['transfer-encoding']
        case tc
        when /chunked/io then read_chunked(socket, block)
        else raise HTTPStatus::NotImplemented, "Transfer-Encoding: #{tc}."
        end
      elsif self['content-length'] || @remaining_size
        @remaining_size ||= self['content-length'].to_i
        while @remaining_size > 0
          sz = [@buffer_size, @remaining_size].min
          break unless buf = read_data(socket, sz)
          @remaining_size -= buf.bytesize
          block.call(buf)
        end
        if @remaining_size > 0 && @socket.eof?
          raise HTTPStatus::BadRequest, "invalid body size."
        end
      elsif BODY_CONTAINABLE_METHODS.member?(@request_method) && !@socket.eof
        raise HTTPStatus::LengthRequired
      end
The product acts as an intermediary HTTP agent
         (such as a proxy or firewall) in the data flow between two
         entities such as a client and server, but it does not
         interpret malformed HTTP requests or responses in ways that
         are consistent with how the messages will be processed by
         those entities that are at the ultimate destination.