Design And Implementation Of Hub Server Based On Pubsubhubbub Protocol

With the rapid development of Internet, Internet has been playing very important roles in people's lives. In the mean time, we are lost in the explosion of information. To solve these problems, search engineers help us to retrieve effective informations from the information ocean. As the increasing requirement about the time, real time search has becomed the new orientation.The development of rss, atom and blog facilitates the people's lives, work and entertainment. But the former polling mode has caused great pressure to the website servers. A new pub/sub protocol named PubSubHubbub comes forth.PubSubHubbub protocol is a new pub/sub protocol, so as to let the subscribers to be notified about the newly updated informations and also release the pressure to the servers. When the subscribers subscribe some rss or atom url, they do not need to poll the url in order to check whether the blog is been updated or publishes new articles, but will be sent the updated information about the feed url from the hub servers. PubSubHubbub protocol also has great significances on real-time search.Using this protocol, search engineers can find the newly updated and created web pages timely, which can be fetched and analyzed.In the PubSubHubbub protocol, hub servers play the most important role. They can process the subscription and unsubscription from subscribers, and verify the subscribers,receive the newly updated informations from the publishers and send those informations to the subscribers timely.With the purpose of promoting the implementation of real-time search,hub servers rocess the subscription and unsubscription from spiders and send updated informations to the search engineer, so that search engineer can get those informations and process them so as to advance the read-time characteristic.