What's New in WCF 4.5

What’s New in WCF 4.5

Ido Flatow, Senior Architect

Sela Group

This presentation:http://sdrv.ms/1b94Zmb

About Me

• Senior architect, Sela Group• Co-author of:

– Developing Windows Azure and Web Services – Microsoft official course

– WCF 4 – Microsoft official course– Pro .NET Performance – Apress

• Microsoft MVP• Focus on server, services, and cloud

technologies• Manager of the Israeli Web Developers User

Group

What is WCF?

• WCF is a unified .NET framework for building service-oriented applications

• WCF was introduced in .NET Framework 3.0 and extended in .NET 3.5, .NET 4, and .NET 4.5

• WCF is the foundation for other Microsoft distributed technologies

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Do You Like WCF?http://twitter.com/#!/search/%23wcf%20config


Common WCF Configuration Issues

• Using wrong service / contract names• Need to remember binding names • Copy & pasting configuration names• Configuration duplication for WCF and IIS

• Some configuration issues were addressed in WCF 4

• Visual Studio 2012 & WCF 4.5 continue the simplification process


Image: chanpipat / FreeDigitalPhotos.net

Visual Studio 2012Editor Simplification

• IntelliSense– Service name– Contract name– Binding type



• IntelliSense– Service name– Contract name– Binding type– Binding configuration– Behavior configuration



• IntelliSense– Service name– Contract name– Binding type– Binding configuration– Behavior

configuration

• Tooltips• Compile-time

validations


Cleaner Endpoint Configuration for IIS• Multiple IIS authentication types in one binding

– Bindings can inherit authentication types from IIS– Instead of multiple endpoints, declare just one!– Set the binding’s clientCredentialType to InheritedFromHost

• New default endpoint for HTTPS– No need to declare endpoints if using both HTTP and HTTPS – Default HTTPS endpoints don’t require client credentials– Customize default endpoints in the ProtocolMapping section


What Other Mess Got Cleaned Up?



Excessive Generated ConfigurationSimplified Client Configuration

SIMPLIFYING WCFDEMO

Duplex Communication with HTTP

• HTTP is a request-response protocol• Updates are through server polling

– Periodic polling (Anything new?)– Long polling (I’m waiting for you!)

• Many disadvantages– Periodic polling inflicts high-latency on updates– Long polling is hard to implement– Can cause bandwidth overhead if used

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WebSockets in a Glance

• Bi-directional TCP channel (full-duplex)• Supports both HTTP and HTTPS (SSL)• Accessible through JavaScript API• Supports cross-domain calls• Client-side - IE10, Chrome, Firefox, WCF 4.5• Server-side – IIS 8, ASP.NET 4.5, WCF 4.5• Standardization is still in progress!!


WebSockets and WCF 4.5

• WCF 4.5 supports WebSockets in two modes:– SOAP over WebSockets (.NET)– Plain text over WebSockets (browsers)

• For SOAP use NetHttpBinding• For browsers, use the Microsoft.WebSockets NuGet

package– Create a service class by inheriting from WebSocketService– Implement control methods – OnOpen, OnStop,

OnMessage, OnError– Send messages to client by calling the Send method


DUPLEX WCF WITH WEBSOCKETSDEMO

WCF and UDP – Q&A

• WCF 3.5– “Does WCF support UDP bindings?”– “Not out-of-the-box, but there is an MS sample for that”

• WCF 4 – “Does WCF support UDP?”– “Not out-of-the-box, but there is an MS sample for that”– “But Discovery uses UDP, right?”– “Indeed, but the UDP transport channel is internally used”

• WCF 4.5– “Does WCF support UDP?”– “YES!!”


UDP Transport

• New UDP binding out-of-the-box• Supports one-way and request-response• Unicast – you do not get an exception if host is down!!• Multicast messaging is supported through IPs such as

224.0.0.1 – 239.255.255.255• Supported features are basic

– Only text encoding– No sessions– No security– No duplex


COMPARING HTTP, TCP, AND UDPDEMO

Improved Channels and Encoding

• Web hosting (IIS)– Fixed streamed messages from being buffered in ASP.NET– Added async streamed reply for slow reading clients

• Self hosting– Support for binary encoding compression (Gzip / Deflate)– Works with TCP and custom HTTP transports

• Both hosting environment– New transport defaults for TCP and named pipe transports– Defaults are now multiplied by #cores to enable

high-density scenarios


TRANSPORT IMPROVEMENTSDEMO

To Conclude

• Yet another effort to simplify the creation of WCF services and clients

• Continuing to support new and existing standards

• Striving to improve the overall performance of WCF


WCF ResourcesWCF Home and Forum

msdn.microsoft.com/en-us/library/dd456779.aspxsocial.msdn.microsoft.com/forums/en/wcf

WCF Blogsblogs.msdn.com/b/piyushjo

blogs.msdn.com/b/carlosfigueira WCF vNext UserVoicetinyurl.com/wcfvnext

My Infoblogs.microsoft.co.il/blogs/idof

[email protected]@idoFlatow

This presentation: sdrv.ms/1b94Zmb

http://msdn.microsoft.com/en-us/library/dd456779.aspx

http://social.msdn.microsoft.com/forums/en/wcf

http://social.msdn.microsoft.com/forums/en/wcf

http://blogs.msdn.com/b/piyushjo

http://blogs.msdn.com/b/piyushjo

http://blogs.msdn.com/b/carlosfigueira

http://blogs.msdn.com/b/carlosfigueira

http://tinyurl.com/wcfvnext

http://tinyurl.com/wcfvnext

http://blogs.microsoft.co.il/blogs/idof

http://blogs.microsoft.co.il/blogs/idof

mailto:[email protected]

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Technology

What's New in WCF 4.5