基于WebSocket的实时Web应用解决方案

WebSocket Based Real Time Web Application Solution

由于用户对Web信息实时性要求的提高，实时Web应用开始被广泛关注，基于各种服务器推送技术的实时Web应用解决方案被提出并广泛应用。然而这些解决方案都存在系统资源消耗大等方面的问题，有待进一步的改进和完善。该文介绍了当前较为广泛应用的两种基于HTTP协议的实时Web应用方案，即基于Ajax的长轮询方式和基于Iftame的流方式，并分析了这两种方案存在的不足。在对HTML5标准中的WebSocket协议进行深入分析的基础上，该文提出了一种基于WebSocket协议的实时Web解决方案，目的是大幅提升实时服务性能，并更高效地利用网络负载和服务器端的处理能力。

Due to the improving demands on instantaneity of web information, real-time web applications is beginning to cause wide- spread interest, and a lot of real-time web applications based on server-push technology has been proposed and used widely. Though these solution are effective, all those solutions suffer from problems such as great resource consumption; there is much space for improvement. This paper introduces two popular HTTP protocol based real-time web application solutions, that is, tong polling based on Ajax and streaming based on Iframe, and analysis their weaknesses. With an in-depth study on WebSocket protocol in HTML5 standard, this paper proposes a WebSocket protocol based real-time web application solution, aiming at improving the service instantaneity on a large scale, and more efficiendy using the network capacity and processing power of the server