TAILIEUCHUNG - When organizations need to make the data available to users spread

When organizations need to make the data available to users spread across various locations, they implement Web applications. These Web applications make use of certain services, known as Web services that provide programming support and help the applications to interact with the database server. | Implementing HTTP Endpoints When organizations need to make the data available to users spread across various locations they implement Web applications. These Web applications make use of certain services known as Web services that provide programming support and help the applications to interact with the database server. To allow communication between the Web services and the database server you need to provide access through additional ports on the Internet firewall. This increases the security threat to the organization. SQL Server 2005 provides native Hypertext Transfer Protocol HTTP support that allows you to create Web services on the database server. These Web services expose Web methods that the Web applications can access by using the HTTP endpoints. This chapter introduces you to Web services. Next it discusses the role of the HTTP endpoints in the Web service architecture. Further it explains how to implement HTTP. Objectives In this chapter you will learn to ỆI Define the Hypertext Transfer Protocol endpoints J Implement the Hypertext Transfer Protocol endpoints for Web services Chapter 10 Introduction to HTTP Endpoints Consider a scenario of a large-scale enterprise that has a number of sales executives. The management has decided to provide Personal Desktop Assistant PDA devices to the sales executives so that they can log the sales details online. In addition the executives need to connect the PDA device to the database server. Providing direct access from a PDA device to the database server involves a high cost. Instead the management can implement Web services through which each sales executive can log the sales details. A Web service is a collection of methods or functions where each method provides a specific functionality. When a client sends a request a Web service accesses data on a predefined set of business logic from the server and returns the data to the client. SQL Server 2005 provides the native support for Web services through the .

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