A Proxy Server Supporting Dynamical Service Policy for Data Subscription and Prefetching

• Main Authors: Chun-Hsiung Hu, 胡竣雄
• Other Authors: Shang-Rong Tsai
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/4na287

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 90 === World Wide Web makes information retrieval more and more convenient. People often spend too much time searching and browsing the Web due to insufficient network bandwidth. Web proxy server is used to reduce the network latency and bandwidth consumption. However, the hit ratio of a proxy server is generally low, hence users still often have to wait for retrieving information. Besides, the existing web proxy servers do not support users to dynamically change the service policy to fit the user’s requirements in term of response time and freshness of data. In this thesis, we describe the design and implementation of a web proxy system that provides services for users to subscribe their favorite Web Pages. The subscribed Web Pages will be prefetched and kept in proxy’s cache space. The subscribed Web Pages will be refreshed automatically. Our proxy system also provides for users to dynamically change the service policy to fit their demand either for quick response or for getting the up-to-date data.