RESTful understand POST VS PUT
http://www.elharo.com/blog/software-development/web-development/2005/12/08/post-vs-put/
chinse version 易懂http://www.cnblogs.com/stalwart/archive/2010/05/15/1735971.html
very good good article
http://www.artima.com/lejava/articles/why_put_and_delete.html
http://www.google.com/url?sa=t&source=web&cd=12&ved=0CB4QFjABOAo&url=http%3A%2F%2Fwww.w3.org%2FProtocols%2Frfc2616%2Frfc2616-sec9.html&rct=j&q=bottlepy%20method%20POST%20PUT%20DEL&ei=IzGCTK6RCZCgsQPC4Mj3Bw&usg=AFQjCNFxHgjZFQcPNUxGVI1QQ-61VBbiWA&sig2=2PsuLirrF5HvdB3vVMLfBQ&cad=rja
在rails中应用的文章
http://my.oschina.net/jing31/blog/6580?catalog=40347
我觉得不错，
有一些分析，我略作笔记：
接下来我们在此基础上来实现一下RESTful版本的CRUD。
为什么要采用RESTful风格：designing controller and action is chaos
HTTP methods (RFC 2616)
POST -> Create
GET -> Read
PUT -> Update
DELETE -> Delete
Remove actions from URL, and we have simple named route.
/events/create -> POST /events
/events/show/1 -> GET /events/1
/events/update/1 -> PUT /events/1
/events/destroy/1 -> DELETE /events/1
CRUD-based action names get things simpler
create -> POST
show -> GET
PUT -> update
delete -> DELETE
运行一下看看吧~
总结一下HTTP请求跟action的4-7关系表：
其实HTML规格只支持GET/POST,不支持PUT和DELETE方法的，rails在生成HTML的时候偷偷的做了一些处理。
我们写的代码是这样的：
- <%##event_path默认是GET，删除需要指定:method##%>
- <%= link_to 'delete', event_path(event), :method => :delete %>
生成的HTML是这样的：
- <a onclick="var f = document.createElement('form'); f.style.display = 'none'; this.parentNode.appendChild(f); f.method = 'POST'; f.action = this.href;var m = document.createElement('input'); m.setAttribute('type', 'hidden'); m.setAttribute('name', '_method'); m.setAttribute('value', 'delete'); f.appendChild(m);var s = document.createElement('input'); s.setAttribute('type', 'hidden'); s.setAttribute('name', 'authenticity_token'); s.setAttribute('value', 'TwKvS1qYjCaO2RQ3QlCdo3K57NfH0yTqKShmMk8jjI0='); f.appendChild(s);f.submit();return false;" href="/events/1">delete</a>
当点击的时候，实际上在页面上生成了下面内容：
- <form id="edit_events_1" method="post" action="/events/1">
- <input type="hidden" value="put" name="_method"/>
- ....
- </form>
其实各种浏览器之间还有一些关于DELETE和PUT一些支持或者不支持的不统一现象，这些问题Rails处理掉了，我们不需要关注了。
另外，XmlHttpRequest（Ajax request）定义了GET/POST/PUT/DELETE/HEAD/OPTIONS
不过不是所有浏览器都支持。