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Real World XML Web Services: For VB and VB .NET Developers by Yasser Shohoud

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5.1. Toolkit API Architecture

The SOAP toolkit is made up of two main parts that can be used together or independently. The first part is the client, which is made up of several COM components that allow you to invoke SOAP-based Web services. The second part is the server components used to expose Web services, usually implemented as COM components. A client application calls a Web service using the SOAP Toolkit's client API as shown in Figure 5.1. The toolkit's client reads the WSDL describing the Web service, creates the SOAP message, and sends an HTTP request to the Web server. On the server, you can choose an ASP page or an ISAPI extension, as the listener for incoming requests. The listener captures the request and invokes the toolkit's ...

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