RESTful Web Service的教程

RESTful Web Service的教程

RESTful Web Service的教程
http://www.drdobbs.com/web-development/restful-web-services-a-tutorial/240169069?pgno=1
http://www.drdobbs.com/web-development/restful-web-services-a-tutorial/240169069?pgno=2
http://www.drdobbs.com/web-development/restful-web-services-a-tutorial/240169069?pgno=3

概要：

1、Representations：可以用JSON或者XML来代表资源。

2、Messages：Client和Service通过Message来交流。Client发送Http Request，Service回复Http Response。
Http Request：Verb、URI、Version、Header、Body
Http Response：Response Code，Version、Header、Body

3、URIs
The URI should not say anything about the operation or action. 
Use HTTP verbs to perform different operations.

4、Uniform Interface
Get
Put(幂等性)
Post
Delete
Options
Head

PUT 和 POST 的区别
Request                          Operation
PUT http://MyService/Persons/    Won't work. PUT requires a complete URI
PUT http://MyService/Persons/1   Insert a new person with PersonID=1 if it does not already exist, or else update the existing resource
POST http://MyService/Persons/   Insert a new person every time this request is made and generate a new PersonID.
POST http://MyService/Persons/1  Update the existing person where PersonID=1

5、Stateless
requests are all independently

6、Links between resources
    <Persons>
        <Person name="p1">
            <URI>http://MyService/Persons/1</URI>
        </Person>
        <Person name="p2">
            <URI>http://MyService/Persons/12</URI>
        </Person>
    </Persons>

7、Cacheing
Caching can be controlled using HTTP headers params