# File lib/cool.io/http_client.rb, line 297
    def parse_header(header)
      return false if @data.empty?

      begin
        @parser_nbytes = @parser.execute(header, @data.to_str, @parser_nbytes)
      rescue Coolio::HttpClientParserError
        on_error "invalid HTTP format, parsing fails"
        @state = :invalid
      end

      return false unless @parser.finished?

      # Clear parsed data from the buffer
      @data.read(@parser_nbytes)
      @parser.reset
      @parser_nbytes = 0

      true
    end