RESTful WCF Services
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This document discusses ASP.NET WCF and REST. It provides an overview of the evolution of the web from content-focused to including capabilities. It also discusses REST architectural principles and how WCF supports RESTful services through features like WebGet, WebInvoke, UriTemplate, and WebHttpBinding. The WCF REST Starter Kit is introduced which provides templates and samples for building RESTful services with WCF.
![[WebGet] And [WebInvoke]Binds a WCF operation to URI space and HTTP methodIndicate the HTTP Method for the operationWebGet – Don’t make me write itWebInvoke – All verbs other than GET (Method parameter takes in the name of the Verb)Other ParametersBodyStyle – Indicates whether the Request/ Response are wrapped or notRequestFormat – Json or XmlResponseFormat – Json or XmlUriTemplate – Rich binding to URI](https://image.slidesharecdn.com/restfulwcf-091206081124-phpapp01/85/RESTful-WCF-Services-15-320.jpg)
![UriTemplateString that allows you to define the structure of the URI, as well as to define “Holes” The “Holes” are variablesYou Bind the template with parameters to fill the holes{productId} hole / variable gets bound to productId parameter in operationVariable[OperationContract][WebGet(UriTemplate=“product/{productId}")]ProductGetProduct(intproductId);](https://image.slidesharecdn.com/restfulwcf-091206081124-phpapp01/85/RESTful-WCF-Services-16-320.jpg)
RESTful WCF Services
- 1. ASP.NET – WCF & RESTHarish RanganathanWeb Developer EvangelistMicrosoft Corporation India
- 4. The BrowserGeneric client experience URI’sAddressing and identification HTMLCommon presentation formatHyperlinksAnarchic interconnectivity HTTP GETCommon operation everything supportsContent-Driven Web Architecture
- 5. 2008:Web == Content + Capabilities
- 6. Capability-Enabled Web ArchitectureRich Browser ClientsProgrammability via script or pluginsHTTPBaseline application protocolCommon set of operations + status codesDomain-neutral data-oriented formatsJSON, Atom/Atom PublishingRefine to support domain-specific schemasPresentation formatsHTML, CSS
- 7. RESTful TenentsThe Web is a graph of linked ResourcesResources are identified by URI’sResources support a fixed set of operationsIn practice, these are defined by HTTPApplications follow links to achieve late bindingREST is an architectural style, not a specification
- 8. REST ContinuumRESTfullnessPuristsPragmatistsWell Constructed URIsHTTP VerbsGET – FetchPUT – Update/InsertDELETE – DeletePOST – AppendStandard RepresentationsPOST to 1 URI OKQuerystrings OK
- 9. HTTP Verbs
- 10. GET – Fetch
- 12. AJAX Services
- 13. POX OKwebHttpBindingNew “web-friendly” WCF Binding in Fx 3.5Allows for the development of RESTful servicesDoes not use SOAP envelopesHTTP and HTTPS Transports OnlySupports several wire formats:XMLJSONBinary (streams)
- 14. WebServiceHostSpecialized SerivceHost for RESTful servicesEliminates need for lots of configurationAutomatically configures address, binding, contractOptimized for single-endpoint servicesUse from .svc file:<%@ ServiceHost Language="C#" Debug="true" Service="Caching1.FeedService" Factory=“System.ServiceModel.Activation.WebServiceHostFactory” %>"%>
- 15. [WebGet] And [WebInvoke]Binds a WCF operation to URI space and HTTP methodIndicate the HTTP Method for the operationWebGet – Don’t make me write itWebInvoke – All verbs other than GET (Method parameter takes in the name of the Verb)Other ParametersBodyStyle – Indicates whether the Request/ Response are wrapped or notRequestFormat – Json or XmlResponseFormat – Json or XmlUriTemplate – Rich binding to URI
- 16. UriTemplateString that allows you to define the structure of the URI, as well as to define “Holes” The “Holes” are variablesYou Bind the template with parameters to fill the holes{productId} hole / variable gets bound to productId parameter in operationVariable[OperationContract][WebGet(UriTemplate=“product/{productId}")]ProductGetProduct(intproductId);
- 17. WCF REST Starter KitMicrosoft.ServiceModel.Web.dllNew features supporting RESTful servicesVisual Studio 2008 TemplatesREST Collections/Singleton ServicesAtom Feed/Atom Publishing ProtocolHTTP/POX ServicesREST SamplesCodeplex ProjectReleased at PDCWritten by WCF teamFeatures may be included in .NET 4.0
- 18. What We've Talked About TodayREST and the “zen” of the webWCF features for REST scenarios[WebGet] + [WebInvoke]UriTemplateWebHttpBindingAnd many more…The WCF REST Starter KitAvailable today at http://msdn.com/wcf/rest
- 19. WebGet/WebInvoke Examples[OperationContract][WebInvoke( Method=“PUT",ResponseFormat=WebMessageFormat.Json,UriTemplate=“product/{productId}")]ProductUpdateProduct(intproductId, product p);[OperationContract][WebGet( ResponseFormat=WebMessageFormat.Json,UriTemplate=“product/{productId}")]ProductDataGetProduct(intproductId);
- 21. © 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.