Common Gateway Interface

In the world of the Internet, Apache and Internet Information Server (IIS) were the web servers that were developed for exchanging the information between clients computer having different Operation System. The only function of IIS is that of displaying static information such as HTML and image files onto the Web Browser. But the major problem lies here that when the information is updated in the database, the administrator has to update it by manual operation. Because it is necessary to update several places about the same information, the work load becomes higher than it is assumed, thus the updation of error and omission may occur. Such problems faced by the Web Developers were solved by the use of a Common Gateway Interface (CGI) program such as a bulletin board system and a Blog system. However, these programs are opened to Internet and often they dont have user authentication and access control mechanism. This means that they have the problem that the user can access it easily and freely only by getting the URL and inputting it into a Web Browser. Common Gateway Interface (CGI) is a standard method used to generate dynamic content for the Web pages and Web applications. When implementation of CGI is done on a Web server, it provides with an interface between the Web server and programs that generate the Web content. These programs are popularly known as CGI scripts or simply CGIs; they are usually written in a scripting language, but can also be written in any other programming language.