7 - eBusiness

M cheung william tan and carson woo a browser

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Unformatted text preview: quires applications to be compiled • Consumes resources when handling many requests; each instance of the program is considered a separate process • Specifies the format and layout of an HTML document in the programming code Copyright © 2009-10 Y.M. Cheung, William Tan and Carson Woo 66 Web Database Application Technologies (cont’d) • Uses a programming environment that BUSI 335 Copyright © 2009-10 Y.M. Cheung, William Tan and Carson Woo – A browser actually references the script page that it wants – This page is interpreted and processed by an application server, an extension to the Web server – This page contains tag-based commands along with HTML – All formatting is done in the same document 67 BUSI 335 Copyright © 2009-10 Y.M. Cheung, William Tan and Carson Woo 68 The Script Page Data-Flow Process Scripting Technologies 1. Submit HTTP request Web Client 2. Client data to the application server Web Server 5. Server passes response to client Databases • Allows tight integration with HTML • Provides more control over the appearance of an Other Applications Page-Based Application Server 4. HTML Web Page HTML document 3. Processes the script Other Web Resources • Provides more efficiency because the page- 1. A client submits a request to the Web server (e.g. www.abc.com/login.asp) 2. The requested page is read into the memory of the server for any script that the application server processes 3. The application server reads the request and processes the tag commands on the page based application server operates as part of the Web server (i.e. in the same memory space) • Examples of the page-based application servers: Active Server Pages and Cold Fusion 4.0 4. The application server inserts the result into the same page and returns the page to the Web server 5. The Web server returns the response to the client BUSI 335 Copyright © 2009-10 Y.M. Cheung, William Tan and Carson Woo 69 BUSI 335 Script Examples Copyright © 2009-10 Y.M. Cheung, William Tan and Carson...
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