Web Services

Web Services can convert your application into a Web-application,
which can publish its function or message to the rest of the world.

The basic Web Services platform is XML + HTTP.

Web Services are published, found, and used through the Web.

1) What are Web Services?

  • Web services are application components
  • Web services communicate using open protocols
  • Web services are self-contained and self-describing
  • Web services can be discovered using UDDI
  • Web services can be used by other applications
  • XML is the basis for Web services

2) How Does it Work?

The basic Web services platform is XML + HTTP.

XML provides a language which can be used between different platforms and programming languages and still express complex messages and functions.

The HTTP protocol is the most used Internet protocol.

Web services platform elements:

  • SOAP (Simple Object Access Protocol)
  • UDDI (Universal Description, Discovery and Integration)
  • WSDL (Web Services Description Language)

The extensive set of XML/Web services support in almost all areas of the .NET is quite visible. Even the .NET Remoting programming model for distribution of components utilizes the Web services-based distribution mechanism. ADO.NET uses XML as a data-exchange layer between database connectivity providers. Web-services development in .NET is similar to another class with some extensions based on attributes. Deploying a Web service is as simple as copying a file (with the .asmx extension) into a Web directory, similar to deploying a Web application. All the necessary plumbing related to support of Web-services standards, including XML, SOAP, and WSDL, is done by the underlying framework. Consuming a Web service from another application or within the same application is also as simple as creating a proxy object, which makes invoking Web services similar to invoking a method on another class.


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