Rest成熟度4层模型
0级：HTTP 远程调用
用医生预约做例子，医院提供appointmentService远程服务接口
查询医生的空闲时间
POST /appointmentService HTTP/1.1
[various other headers]
<openSlotRequest date = "2010-01-04" doctor = "mjones"/>
HTTP/1.1 200 OK
[various headers]
<openSlotList>
<slot start = "1400" end = "1450">
<doctor id = "mjones"/>
</slot>
<slot start = "1600" end = "1650">
<doctor id = "mjones"/>
</slot>
</openSlotList>
预约
POST /appointmentService HTTP/1.1
[various other headers]
<appointmentRequest>
<slot doctor = "mjones" start = "1400" end = "1450"/>
<patient id = "jsmith"/>
</appointmentRequest>
HTTP/1.1 200 OK
[various headers]
<appointment>
<slot doctor = "mjones" start = "1400" end = "1450"/>
<patient id = "jsmith"/>
</appointment>
1级：资源级
跟远程调用区别，现在每一个独立的资源有独立的请求地址。
查询医生的空闲时间
POST /doctors/mjones HTTP/1.1
[various other headers]
<openSlotRequest date = "2010-01-04"/>
HTTP/1.1 200 OK
[various headers]
<openSlotList>
<slot id = "1234" doctor = "mjones" start = "1400" end = "1450"/>
<slot id = "5678" doctor = "mjones" start = "1600" end = "1650"/>
</openSlotList>
预约
POST /slots/1234 HTTP/1.1
[various other headers]
<appointmentRequest>
<patient id = "jsmith"/>
</appointmentRequest>
HTTP/1.1 200 OK
[various headers]
<appointment>
<slot id = "1234" doctor = "mjones" start = "1400" end = "1450"/>
<patient id = "jsmith"/>
</appointment>
2级：动作级
查询医生的空闲时间
GET /doctors/mjones/slots?date=20100104&status=open HTTP/1.1
Host: royalhope.nhs.uk
HTTP/1.1 200 OK
[various headers]
<openSlotList>
<slot id = "1234" doctor = "mjones" start = "1400" end = "1450"/>
<slot id = "5678" doctor = "mjones" start = "1600" end = "1650"/>
</openSlotList>
预订
POST /slots/1234 HTTP/1.1
[various other headers]
<appointmentRequest>
<patient id = "jsmith"/>
</appointmentRequest>
HTTP/1.1 201 Created
Location: slots/1234/appointment
[various headers]
<appointment>
<slot id = "1234" doctor = "mjones" start = "1400" end = "1450"/>
<patient id = "jsmith"/>
</appointment>
3级：状态级
GET /doctors/mjones/slots?date=20100104&status=open HTTP/1.1
Host: royalhope.nhs.uk
HTTP/1.1 200 OK
[various headers]
<openSlotList>
<slot id = "1234" doctor = "mjones" start = "1400" end = "1450">
<link rel = "/linkrels/slot/book"
uri = "/slots/1234"/>
</slot>
<slot id = "5678" doctor = "mjones" start = "1600" end = "1650">
<link rel = "/linkrels/slot/book"
uri = "/slots/5678"/>
</slot>
</openSlotList>
POST /slots/1234 HTTP/1.1
[various other headers]
<appointmentRequest>
<patient id = "jsmith"/>
</appointmentRequest>
HTTP/1.1 201 Created
Location: http://royalhope.nhs.uk/slots/1234/appointment
[various headers]
<appointment>
<slot id = "1234" doctor = "mjones" start = "1400" end = "1450"/>
<patient id = "jsmith"/>
<link rel = "/linkrels/appointment/cancel"
uri = "/slots/1234/appointment"/>
<link rel = "/linkrels/appointment/addTest"
uri = "/slots/1234/appointment/tests"/>
<link rel = "self"
uri = "/slots/1234/appointment"/>
<link rel = "/linkrels/appointment/changeTime"
uri = "/doctors/mjones/slots?date=20100104@status=open"/>
<link rel = "/linkrels/appointment/updateContactInfo"
uri = "/patients/jsmith/contactInfo"/>
<link rel = "/linkrels/help"
uri = "/help/appointment"/>
</appointment>
各个级别的意义
- 资源级：把复杂单一的入口，拆分成独立的资源控制
- 动作级：给资源定义了标准，统一的动作
- 状态级：提供了可发现的，自描述的接口
