Services in the WebREST mit WCF 4, Silverlight und AJAX

Daniel Fisher (lennybacon) | devcoach.com

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Agenda• What is REST?• WCF WebHttp• Consumer

The WCF Eco System

WCF Core

Services

WCF Data

Services

WCF Workflo

w Service

s

WCF WebHtt

p

WCF RIA

Services

What is REST?￭ A term coined by Roy Fielding￭ Style of architecture￭ Resource based￭ Cachable￭ NOT SOAP, NOR SESSION

￭ Web Standards!

What is WebHttp?• A Services flavor• RESTful • Non-SOAP HTTP services• Complete control over the • URI• Format• Protocol

WebHttp v 4.0￭ WCF 3.5￭ + WCF REST Starter Kit￭ + .NET 4￭ + new Features

demo!

Attribute Inheritance[ServiceContract]public interface ISessionPlaner{ [OperationContract] [WebGet(UriTemplate = "Sessions")] List<SessionDetail> GetAllSessions();}

Attribute Inheritance[ServiceContract]public interface ISessionPlaner{ [WebGet(UriTemplate = "Sessions")] List<SessionDetail> GetAllSessions();}

DO NOT REPEAT YOURSELF!

No Routing

Routingpublic class Global : System.Web.HttpApplication

{

void Application_Start( object sender, EventArgs e)

{

RouteTable.Routes.Add(

new ServiceRoute(

string.Empty,

new WebServiceHostFactory(),

typeof(SessionPlanerService)));

}

Configuring the Module

<configuration> … <system.web> // <system.webServer> IIS 7 … <httpModules> … <add name="urlRouting" type="System.Web.Routing.UrlRoutingModule"/> </httpModules>…

ASP.NET Routing

Controller

Model

View

RoutingRule

WCF Routing

ServiceHost

Service

RoutingRule

demo!

What about the contract?

Description Attribute[ServiceContract]public interface ISessionPlaner{ [Description("Gets all sessions.")] [WebGet(UriTemplate = "Sessions")] List<SessionDetail> GetAllSessions();}

/help

demo!

Consumer

￭ .NET ￭ WebRequest￭ WebClient￭ HttpClient￭ WebChannelFactory

￭ AJAX￭ Silverlight

demo!

Explicit Format Selectionif (WebOperationContext.Current. IncomingRequest.Headers["Accept"] == "application/json")

{ WebOperationContext.Current. OutgoingResponse.Format = WebMessageFormat.Json;

}

Automatic Format Selection<system.serviceModel>

<standardEndpoints>

<webHttpEndpoint>

<standardEndpoint

name=""

automaticFormatSelectionEnabled="true">

<security mode="None"/>

demo!

Caching[AspNetCacheProfile("A")]

<system.web>  <caching>     <outputCache enableOutputCache="true"/> <outputCacheSettings>           <outputCacheProfiles>           <add name="A" location="Server" duration="60"               varyByParam="skip; top; manager" varyByHeader="Accept"/>     

Web Faultsthrow new WebFaultException<string>( string.Format( CultureInfo.CurrentCulture, "There is no user with the userName '{0}'.", userName), HttpStatusCode.NotFound);

References￭ WCF REST Starter Kit Preview 2 ￭ http://

aspnet.codeplex.com/releases/view/24644