class HTTPClient::Session

def read_header
  @content_length = nil
  @chunked = false
  @content_encoding = nil
  @chunk_length = 0
  parse_header(@socket)
  # Header of the request has been parsed.
  @state = :DATA
  req = @requests.shift
  if req.header.request_method == 'HEAD' or no_message_body?(@status)
    @content_length = 0
    if @next_connection
      @state = :WAIT
    else
      close
    end
  end
  @next_connection = false if !@content_length and !@chunked
end