read_header

# File lib/webrick/httprequest.rb, line 238
    def read_header(socket)
      if socket
        while line = read_line(socket)
          break if /\A(#{CRLF}|#{LF})\z/om =~ line
          @raw_header << line
        end
      end
      begin
        @header = HTTPUtils::parse_header(@raw_header)
      rescue => ex
        raise  HTTPStatus::BadRequest, ex.message
      end
    end