discuz关于发帖数据保存功能
discuz发帖有个机制，当发送中断后，会自己保存数据，当下次登录的时候，出现：您有上次未提交成功的数据 恢复数据
我想学习这个功能。
请问是ajax保存到数据库？还是存到cookie什么的？
请指教主要是哪些代码就可以了，我自己去学学。
回复讨论(解决方案)
1.如果特别重要的或者需要长时间编辑的内容 建议 setinterval ajax 保存用户的草稿信息到数据库（memcache、redis更好） 这样也可以实现夸浏览器
2.如果不重要的，判断用户浏览器是否支持HTML5的localStorage 保存在localStorage 如果是不支持的存储在cookie 但是cookie保存数据不要太多 因为每个请求都会传递cookie
第一种方式 可以参考博客系统
第二种方式可以参考 http://www.zhangxinxu.com/wordpress/2011/09/html5-localstorage%E6%9C%AC%E5%9C%B0%E5%AD%98%E5%82%A8%E5%AE%9E%E9%99%85%E5%BA%94%E7%94%A8%E4%B8%BE%E4%BE%8B/
1.如果特别重要的或者需要长时间编辑的内容 建议 setinterval ajax 保存用户的草稿信息到数据库（memcache、redis更好） 这样也可以实现夸浏览器
2.如果不重要的，判断用户浏览器是否支持HTML5的localStorage 保存在localStorage 如果是不支持的存储在cookie 但是cookie保存数据不要太多 因为每个请求都会传递cookie
第一种方式 可以参考博客系统
第二种方式可以参考 http://www.zhangxinxu.com/wordpress/2011/09/html5-localstorage%E6%9C%AC%E5%9C%B0%E5%AD%98%E5%82%A8%E5%AE%9E%E9%99%85%E5%BA%94%E7%94%A8%E4%B8%BE%E4%BE%8B/
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