1. Unlocking the secrets of REST with WCF
Glenn Block
Blogs/msdn.com/gblock
@gblock

2. REST, Definition vs Practice
REST by definition is clear
In practice REST is a highly overloaded term
REST in practice means over HTTP

3. Richardson’s HTTP Maturity model
Hypermedia
HTTP
URI

4. Level 0 – Single URI / Single Verb
SOAP Envelope (POST)
Create
Update
\OrderService.svc
Order System
Submit
Delete
Cancel
Approve
Find

5. Level 1 – Multi URI / Single Verb
XML/JSON – GET
Create
Orders/Create
Update
Orders/Update
Order System
Submit
Orders/Submit
Delete
Orders/Delete
Cancel
Orders/Cancel
Approve
Orders/Approve
Find
Orders/Find

6. Level 2 – Multi URI / Multi Verb
XML/JSON/ATOM
PUT
Orders/
POST
Orders/1234
POST
Order System
Orders/Submitted
DELETE
Orders/1234
POST
Orders/Cancelled
POST
Orders/Approved
GET
Orders/1234

7. Level 2 – Hypermedia aware
Custom media types
GET
Orders/
<link rel=“Update” …/>
Orders/1234
<link rel=“Submit” …/>
Order System
Orders/Submitted
<link rel=“Delete” …/>
Orders/1234
<link rel=“Cancel” …/>
Orders/Cancelled
<link rel=“Approve” …/>
Orders/Approved
<link rel=“View” …/>
Orders/1234

8. Hypermedia what? HTTP/1.1 200 OK Content-Length: 421
Content-Type: application/vnd.ConstosoOrders+xml
Date: Sun, 3 May :22:11 GMT
<order xmlns=" xlmns:atom="
<OrderID>1234</OrderID>
<-- Order details --/>
<link rel=“Submit” href=“
<link rel=“Delete” href=“
<link rel=“Cancel” href=“
<link rel=“Approve” href=“
<link rel=“View” href=“
</order>

9. Browser Devices WCF Silverlight Desktop Reach any client
WCF already supports exposing services over HTTP.
We have heard for you that is a good start but you want us to go further
Desktop

10. Code is easier to maintain
Service
Separation of concerns
Testability
"Raw"
HTTP
HTTP
Concerns
Simplified Configuration

11. Separating out HTTP and other concerns
Application concerns / CLR Objects
Handler
HTTP
Message
Operation
Low Level HTTP specific concerns / HTTP Only
Http
Channel
HTTP
Message

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14. THANK YOU