基于flex框架的web即时通讯系统的分析与实现word格式论文.docxVIP

 PAGE 4 III Research and Implementation of Web instant messaging system based on the Flex framework Abstract With the gradual development of the Internet,social groups differentiation and collaboration are more and more complex and diversed.In existing instant messaging, the widespread use of client software installed on the operating system can not adapt to such rapid differentiation, people need instant messaging tools to be able to collaborate mailbox, communities, forums and so on. The Web IM tools will have a broad 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.On this basis the web instant messaging system based on the Flex framework is designed and come true. WebIM is based on B / S structure, the transmission of information is that the connection of the Web client and server is polling,long connection or full-duplex communication. This thesis to complete the long connection of the client and the server is using Flex Socket and server Socket to communicate with each other,achieving data interaction HTTP-based two-way communication of the foreground and background.We use the communication protocol is HTTP (Hypertext Transfer Protocol) which is the communication regulation between a browser and the WWW server, is a transfer protocol of sent hypertext to the browser from the WWW and is distributed collaboration.We choose the Cairngorm framework as the foreground framework, which is a Flex framework based on MVC structure, has a higher 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 the coupling module. Comprehensive utilization of these technologies from multiple systems framework to optimize and improve communication efficiency. On the basis of this architecture achieving a series of functions such a