get_body (HTTPClient::Session)

    # File lib/httpclient/session.rb, line 584
        def get_body(&block)
          begin
            read_header if @state == :META
            return nil if @state != :DATA
            if @chunked
              read_body_chunked(&block)
            elsif @content_length
              read_body_length(&block)
            else
              read_body_rest(&block)
            end
          rescue
            close
            raise
          end
          if eof?
            if @next_connection
              @state = :WAIT
            else
              close
            end
          end
          nil
        end