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Web Services

Matthew Kubicina CIS 764 Kansas State University. Web Services. What are Web Services?. It is a Distributed Technology Other Distributed Technologies .NET Remoting COM Message Queuing Facilitates the transfer of data between client and server using standard protocols and transports

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Web Services

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  1. Matthew Kubicina CIS 764 Kansas State University Web Services

  2. What are Web Services? • It is a Distributed Technology • Other Distributed Technologies • .NET Remoting • COM • Message Queuing • Facilitates the transfer of data between client and server using standard protocols and transports • Benefits • Loosely coupled • Interoperability between platforms

  3. Standards • XML (eXtensible Markup Language) • Industry standard for storing and transmitting data in a hardware/software independent format • Used as the format for all data and messages exchanged between the client and the web service. • SOAP (Simple Object Access Protocol) • Protocol for exchanging information to/from a web service • WSDL (Web Service Description Language) • Used as a specification to describe the capabilities of a web service

  4. Interoperability • Web Services are built on industry standards. • This allows web services created in one platform or technology to communicate with a client built on another platform. • Attractive option for vendors looking to expose application functionality or data to external software applications. • Most major languages/platforms have built in support for web services using these industry standards.

  5. Additional Specifications • WS-Security • WS-Reliability • WS-Reliable Messaging • WS-Addressing • WS-Transaction

  6. Where do Web Services fit in? Typical 3-tier application architecture Web Service based architecture Source: http://www.15seconds.com/issue/031215.htm

  7. Tools • Microsoft Visual Studio • Microsoft’s Web Service Enhancements (WSE) • Oracle JDeveloper • Both tools can create web services as well as client applications to consume web services.

  8. Benefits of Microsoft .NET • Allows developers to create web services using familiar programming constructs. • Provides infrastructure and tools to create a standards-compliant web services and clients. • Web Services take advantage of ASP.NET’s benefits • All code is compiled • Early Binding • Strongly Typing • Microsoft Visual Studio and ASP.NET abstracts the use of XML and SOAP when working with a web service to just objects.

  9. Web Service Examples • Applications that use Web Services • XBOX Live • MSN • Web Services available for our use • Google Search • eBay Auction Listings • Amazon.com

  10. References • MSDN – Getting Started with Web Services http://msdn2.microsoft.com/en-us/webservices/aa740678.aspx • MSDN – Web Services and the Microsoft Platform http://msdn2.microsoft.com/en-us/library/aa480728.aspx • Wikipedia – Web Services http://en.wikipedia.org/wiki/Web_services • Benefits of XML Web Services Created using ASP.NET http://msdn2.microsoft.com/en-us/library/0859ebft.aspx

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