Developing REST Applications with the .NET FrameworkHenrik Frystyk Nielsen, Principal Architect

FT55

Do You Speak REST?

> What is REST?> Why REST?> How does .NET support REST? > How do I get started?

Constrained Interactions

> Resource are identified by URIs

> Resources are exposed in terms of state

> Resources can only interact through exchange of state

> Resource behavior is hidden

Guiding Principles or Straight Jacket?> Loose coupling

> Resources only see each other as state> Scalability

> State is often cacheable and can be moved around> Composability

> State + State = State> Deployment

> State can be rendered in many different ways> Reuse and Interop

> State is easy to consume> Observability

> State shows what the system is doing

Going Beyond Retrieval

> HTTP Vocabulary> GET – get state> PUT – create/replace state> POST – insert/modify/process state> DELETE – delete state> OPTIONS – metadata

> Atom and AtomPub> Collections and link relationships

Open Data Protocol (OData)

> A RESTful protocol for data sharing> It all started with Astoria, or “Data

Services”> A set of conventions on top of

AtomPub> Structured data, expanded hierarchies,

queries in URLs, batching> With many products following the

conventions, it was time for a name

From Browsing to App Model

> Move towards HTTP/REST across all tiers> Mash-ups, Cloud Services, User Interface> Computation and Business Logic> Databases and Files> Devices and hardware

Service alignment

> WCF WebHttp Services (WCF REST)> Building RESTful as well as Xml over HTTP services with

control over URI/format/protocol> WCF Data Services (ADO.Net Data Services)

> Exposing data models through a RESTful interface> WCF RIA Services (.NET RIA Services)

> Building end-to-end Silverlight application> WCF Core Services

> Full flexibility for building operation-centric services with industry standard interop, as well as channel and host plug-ability.

> WCF Workflow Services> Long running, durable operations or where the

specification and enforcement of operation sequencing is important

Windows Communication Foundation

Channel ModelFormats

(Atom, JSON, XML,…)

Transports(HTTP, TCP, …)

Protocols(SOAP, HTTP, Open Data Protocol,…)

Service Model

Data ContractService

ContractService Behavior

Programming Model

Core Services

Web HTTP

Services

Data Services

RIA Services

Workflow

Services

DEMO

ServiceOperation style HTTP/REST services

Web HTTP Services

DEMO

Exposing RESTful data models

Data Services

DEMO

Rich end-to-end Silverlight apps

RIA Services

Demo Recap…

> WCF WebHttp Services (WCF REST)> Building RESTful as well as Xml over HTTP

services with control over URI/format/protocol

> WCF Data Services (ADO.Net Data Services)> Exposing data models through a RESTful

interface> WCF RIA Services (.NET RIA

Services)> Building end-to-end Silverlight application

DEMO

Mixing HTTP, Data & RIA Services

>>FUTURE

DEMO

New generation HTTP API

Http Client

>>FUTURE

What’s Next?

> What is REST?> Architectural style for state-driven applications> Key is constrained interactions

> Why REST?> Interop between cloud, on-premise, cross-

domains> Move towards resource-based application

model> How do I get started?

> .NET 4.0 Beta 2 and Silverlight 4.0 Preview> http://blogs.msdn.com/endpoint

> Blogs and announcements

Catch These PresentationsID Title

CL06 Networking and Web Services in Silverlight

CL07 Mastering Microsoft .NET RIA Services

CL21 Building Amazing Business Applications with Microsoft Silverlight and Microsoft .NET RIA Services

FT10 Evolving ADO.NET Entity Framework in .NET 4 and Beyond

FT12ADO.NET Data Services: What’s new with the RESTful data services framework

FT13 What’s New for Windows Communication Foundation 4

PR02 Overview of SharePoint 2010 Programmability

PR12 It's All About the Services: Developing Custom Applications for Microsoft SharePoint Server 2010 Using Microsoft ASP.NET, WCF, and REST

SVC19 REST Services Security Using the Microsoft .NET Access Control Service

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