﻿<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>博客园-Live-随笔分类-IM</title><link>http://www.cnblogs.com/songsong/category/63665.html</link><description /><language>zh-cn</language><lastBuildDate>Thu, 09 Apr 2009 12:59:36 GMT</lastBuildDate><pubDate>Thu, 09 Apr 2009 12:59:36 GMT</pubDate><ttl>60</ttl><item><title>Comet,Ajax的后续者？</title><link>http://www.cnblogs.com/songsong/archive/2006/08/08/471092.html</link><dc:creator>一唯</dc:creator><author>一唯</author><pubDate>Tue, 08 Aug 2006 06:37:00 GMT</pubDate><guid>http://www.cnblogs.com/songsong/archive/2006/08/08/471092.html</guid><wfw:comment>http://www.cnblogs.com/songsong/comments/471092.html</wfw:comment><comments>http://www.cnblogs.com/songsong/archive/2006/08/08/471092.html#Feedback</comments><slash:comments>49</slash:comments><wfw:commentRss>http://www.cnblogs.com/songsong/comments/commentRss/471092.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/songsong/services/trackbacks/471092.html</trackback:ping><description><![CDATA[摘要: 最近对Google很感兴趣，特别是Gmail中实现的chat功能。web IM实际上一点也不陌生，不过大多数都比较慢，可能还是归根于传统的pull data的模式，为了达到实时，只有提高pull的频率，不过这始终不是办法。并且很浪费资源，因为即使没有你要的数据，你也会一直在请求。回头看 Gmail中的Chat程序，发现很快，基本上和使用GTalk客户端差不多，经过抓包分析，发现并不是定时去请求拿数据。&nbsp;&nbsp;<a href='http://www.cnblogs.com/songsong/archive/2006/08/08/471092.html'>阅读全文</a><img src ="http://www.cnblogs.com/songsong/aggbug/471092.html?type=1" width = "1" height = "1" />]]></description></item><item><title>怎么构建无视防火墙的IM（即时通讯软件）</title><link>http://www.cnblogs.com/songsong/archive/2006/07/11/447890.html</link><dc:creator>一唯</dc:creator><author>一唯</author><pubDate>Tue, 11 Jul 2006 03:55:00 GMT</pubDate><guid>http://www.cnblogs.com/songsong/archive/2006/07/11/447890.html</guid><wfw:comment>http://www.cnblogs.com/songsong/comments/447890.html</wfw:comment><comments>http://www.cnblogs.com/songsong/archive/2006/07/11/447890.html#Feedback</comments><slash:comments>2</slash:comments><wfw:commentRss>http://www.cnblogs.com/songsong/comments/commentRss/447890.html</wfw:commentRss><trackback:ping>http://www.cnblogs.com/songsong/services/trackbacks/447890.html</trackback:ping><description><![CDATA[摘要: 传统的IM软件无法穿过防火墙，但是web版的一般都可以。（网管总不会nb到不让访问web吧）MSN也有web版的了，但是速度......但是Gmail-Chat可以说非常完美了。不过不知道原理。首先想...&nbsp;&nbsp;<a href='http://www.cnblogs.com/songsong/archive/2006/07/11/447890.html'>阅读全文</a><img src ="http://www.cnblogs.com/songsong/aggbug/447890.html?type=1" width = "1" height = "1" />]]></description></item></channel></rss>