| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique of transmitting a portal page including a portlet more efficiently.SOLUTION: A portal server includes: a portlet display content generation part 11 for generating a display content of a portlet; a portlet difference information generation part 12 for generating, while setting a display content of portlet at a certain point of time to a portlet cache, difference data of a display content at another point of time relative to the portlet cache; a portlet difference information storage part 13 for storing the portlet cache and the difference data; a layout information storage part 14 for storing a layout of the portlet; a request information reception part 15; a response information generation part 16 for generating, in response to reception of a request, response information including the layout, the portlet cache and the difference data, and generating, in response to re-reception of the request, response information including difference data stored in the portlet difference information storage part 13 after the reception time of the previous request; and a response information transmission part 17. |
