Zhongshan City Public Security Bureau Based On Reverse Ajax Instant Messaging System Design And Implementation

With the popularization of Internet and the development of network technology,the way of communication between people are becoming more and more diverse,from the E-mail system to the instant messaging system by now, each kind of newtechnology was greatly facilitate the communication and shorten the distancebetween people.Instant messaging system have powerful features with strongreal-time, plurality of content, low cost, and can be traced back. The powerfulfeatures have been profound understanding by people, and play a more and moreimportant role in dailylife, also in the Public security departments.However, most of the instant messaging system such as QQ with its internet,public and entertainment types are not suitable for the government to use which witha relatively closed network, especially not for the Public security departments whichhas a stringent requirements for the security of information. Meanwhile, some kind ofLAN type instant messaging system such as IP Messager, are not convenient for thedaily management because of the user IP can be changed randomness, and hard totrack the headstream. These type of instant messaging system are also forbad by thePublic security departments with express provision because of its point-to-pointfeature.For the above reasons, after my study base on the research of the popular instantmessaging products in the market and access to a large number of documents, I havedesigned a reversal Ajax-based with B/S structure instant messaging system with afull support from the Zhongshan Municipal Public Security Bureau. The system iscurrently operating in Public Security Bureau of Zhongshan, and run steady.The achievements of the system is as followed:(1) Make the works of system upgrades and version control mode effective by B/SMode;(2) To achieve real-time and high performance balance by Reverse Ajaxtechnology;(3) To ensure the clear typeset and interface aesthetics of the system by the interchange format of EXT JS framework and JSON data;(4) To achieve the single sign-on by docking with the OA system;(5) To actualize the friends chat and group chat functionality;(6) To strengthen and improve the tracking and tracing of online informationdissemination through the history log management.