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Email and Web Services Essay Sample

Email and Web Services Pages
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The common gateway interface (CGI) is a standard way for a Web server to pass a Web user’s request to an application program and to receive data back to forward to the user. It is part of the Web’s Hypertext Transfer Protocol (HTTP). A disadvantage of a CGI application (or “executable file,” as it is sometimes called) is that each time it is run, it runs as a separate process with its own address space, resulting in extra instructions that have to be performed, especially if many instances of it are running on behalf of users The improper use of CGI scripts affords users a number of vulnerabilities in system security. Failure to validate user input, poorly chosen function calls, and insufficient file permissions can all be exploited through the misuse of CGI.

Internet Server Application Programming Interface (ISAPI) is a set of Windows program calls that let you write a Web server application that will run faster than a common gateway interface (CGI) application. Using ISAPI, you create a dynamic link library (DLL) application file that can run as part of the Hypertext Transport Protocol (HTTP) application’s process and address space. The DLL files are loaded into the computer when HTTP is started and remain there as long as they are needed; they don’t have to be located and read into storage as frequently as a CGI application.

Server Side Includes (SSI) SSI (Server Side Includes) are directives that are placed in HTML pages, and evaluated on the server while the pages are being served. They let you add dynamically generated content to an existing HTML page, without having to serve the entire page via a CGI program, or other dynamic technology. The decision of when to use SSI, and when to have your page entirely generated by some program, is usually a matter of how much of the page is static, and how much needs to be recalculated every time the page is served. SSI is often disabled by system administration due the known security flaws it presents

Active Server Pages (ASP) an HTML page that includes one or more scripts (small embedded programs) that are processed on a Microsoft Web server before the page is sent to the user. cript in the Web page at the server uses input received as the result of the user’s request for the page to access data from a database and then builds or customizes the page on the fly before sending it to the requestor.

ASP is a feature of the Microsoft Internet Information Server (IIS), but, since the server-side script is just building a regular HTML page, it can be delivered to almost any browser. Any web pages containing ASP cannot be run by just simply opening the page in a web browser. The page must be requested through a web server that supports ASP, this is why ASP stands for Active Server Pages, no server, no active pages. Legacy has been replaced by ASP.NET

ASP.NET ASP.NET is an open source[2] server-side Web application framework designed for Web development to produce dynamic Web pages. It was developed by Microsoft to allow programmers to build dynamic web sites, web applications and web services.

It was first released in January 2002 with version 1.0 of the .NET Framework, and is the successor to Microsoft’s Active Server Pages (ASP) technology. ASP.NET offers three frameworks for creating web applications: Web Forms, ASP.NET MVC, and ASP.NET Web Pages. All three frameworks are stable and mature, and you can create great web applications with any of them. No matter what framework you choose, you will get all the benefits and features of ASP.NET everywhere.

Each framework targets a different development style. The one you choose depends on a combination of your programming assets (knowledge, skills, and development experience), the type of application you’re creating, and the development approach you’re comfortable with. All three frameworks will be supported, updated, and improved in future releases of ASP.NET.

All three ASP.NET frameworks are based on the .NET Framework and share core functionality of .NET and of ASP.NET. For example, all three frameworks offer a login security model based around membership, and all three share the same facilities for managing requests, handling sessions, and so on that are part of the core ASP.NET functionality.

Resources

MOAC 70-643 Windows Server 2008 Applications Infrastructure Configuration Microsoft Co. (2009) Danvers, MA
Microsoft ASP.NET retrieved from: ASP.NET

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