Research And Implementation Of Web Instant Messaging System Based On The Flex Framework

With the gradual development of the Internet,social groups differentiation andcollaboration are more and more complex and diversed.In existing instant messaging,the widespread use of client software installed on the operating system can not adaptto such rapid differentiation, people need instant messaging tools to be able tocollaborate mailbox, communities, forums and so on. The Web IM tools will have abroad future development and huge commercial value.This thesis by comparing the several existing web instant messaging technology,analyses feasibility of the web instant messaging system in the Flex framework.Onthis basis the web instant messaging system based on the Flex framework is designedand come true.WebIM is based on B/S structure, the transmission of information is that theconnection of the Web client and server is polling,long connection or full-duplexcommunication. This thesis to complete the long connection of the client and theserver is using Flex Socket and server Socket to communicate with eachother,achieving data interaction HTTP-based two-way communication of theforeground and background.We use the communication protocol is HTTP (HypertextTransfer Protocol) which is the communication regulation between a browser andthe WWW server, is a transfer protocol of sent hypertext to the browser from theWWW and is distributed collaboration.We choose the Cairngorm framework as theforeground framework, which is a Flex framework based on MVC structure, has ahigher structured and provides some of the best strategies for Java developers,because it is highly structured it is very suitable for teamwork and can reduce thecoupling module. Comprehensive utilization of these technologies from multiplesystems framework to optimize and improve communication efficiency. On the basisof this architecture achieving a series of functions such as users login, the user list management, instant messaging, users online prompts to construct a set of low delayand high concurrency Web instant messaging system.Web Messenger for enterprise office software and Internet applications to providea valid user communication services.