1. H OW TO BUILD A S IMPLE REST BASED SERVICE IN WCF Adnan Masood www.AdnanMasood.com

2. A BOUT M E AKA. S HAMELESS S ELF P ROMOTION Sr. Software Engineer / Tech Lead for Green Dot Corp. (Financial Institution) Design and Develop Connected Systems Involved with SoCal Dev community, co-founded San Gabriel Valley.NET Developers Group. Published author and speaker. MS. Computer Science, MCPD (Enterprise Developer), MCT, MCSD.NET Doctoral Student - Areas of Interest: Machine learning, Bayesian Inference, Data Mining, Collaborative Filtering, Recommender Systems. Contact at adnanmasood@acm.org Read my Blog at www.AdnanMasood.comwww.AdnanMasood.com Doing a session in IASA 2008 in San Francisco on Aspect Oriented Programming; for details visit http://www.iasaconnections.com

3. W HAT IS REST? REST is a term coined by Roy Fielding in his Ph.D dissertation [1] to describe an architecture style of networked systems. [1] http://www.ebuilt.com/fielding/pubs/dissertation/top.htm

4. WCF S UPPORT TO REST WebHttpBinding: Sends information directly over HTTP or HTTPS—no SOAP envelope is created. This binding is new with the.NET Framework 3.5 version of WCF, and it’s the right choice for RESTful communication and other situations where SOAP isn’t required. The binding offers three options for representing content: text-based XML encoding, JavaScript Object Notation (JSON) encoding, and opaque binary encoding.

5. http://example.com/users/ http://example.com/users/{user} (one for each user) http://example.com/findUserForm http://example.com/locations/ http://example.com/locations/{location} (one for each location) http://example.com/findLocationForm Examples

6. REST VS. SOAP – Enhanced Caching – Invocation vs. Resource – Bloat vs. Simplicity – Proxy Servers – Web evolution (semantic Web) – Generic Uri based interface via UriTemplates (versus custom SOAP interface) – Interoperability

7. HTTP Programming with WCF and the.NET Framework 3.5 - Justin Smith http://msdn.microsoft.com/msdnmag/issues/08/01/WCFinOrcas/d efault.aspx http://msdn.microsoft.com/msdnmag/issues/08/01/WCFinOrcas/d efault.aspx What's New for WCF in Visual Studio 2008 – Juval Lowy http://msdn.microsoft.com/msdnmag/issues/08/02/Foundations/d efault.aspx http://msdn.microsoft.com/msdnmag/issues/08/02/Foundations/d efault.aspx RESTful Web Services By Leonard Richardson, Sam Ruby http://www.amazon.com/RESTful-Web-Services-Leonard- Richardson/dp/0596529260 http://www.amazon.com/RESTful-Web-Services-Leonard- Richardson/dp/0596529260 Mix 2007 Talk by Don Box and Steve Maine “DEV03 - Navigating the Programmable Web” http://sessions.visitmix.com/default.asp?event=1011&session=20 12&pid=DEV03&disc=&id=1512&year=2007&search=DEV03 http://sessions.visitmix.com/default.asp?event=1011&session=20 12&pid=DEV03&disc=&id=1512&year=2007&search=DEV03 R EFERENCES

8. Paul Prescod has written several excellent articles on REST: – Second Generation Web Services http://www.xml.com/pub/a/2002/02/06/rest.html – REST and the Real World http://www.xml.com/pub/a/2002/02/20/rest.html – SOAP, REST and Interoperability http://www.prescod.net/rest/standardization.html – Evaluating XML for Protocol Control Data http://www.prescod.net/xml/envelopes/ Wikipedia Entry on REST http://en.wikipedia.org/wiki/Representational_State_Transfer Publishing RSS and ATOM Feeds using WCF 3.5 Syndication Libraries http://www.codeproject.com/KB/WCF/WCF35RSSATOM.aspx Exploring WCF 3.5 Tools - WcfSvcHost and WcfTestClient http://www.codeproject.com/KB/WCF/WCF35Utils.aspx Web Service Studio http://www.codeplex.com/WebserviceStudio JSON http://en.wikipedia.org/wiki/JSON

9. C ONCLUDING R EMARKS REST is a “new” paradigm for.NET Developers; a new way to think about programming web services but it’s not really new since we have been using it for a long time over the web. Any Questions / Comments … feel free to contact adnanmasood@gmail.com adnanmasood@gmail.com Visit www.AdnanMasood.comwww.AdnanMasood.com