Category: Cgi

CGI (Common Gateway Interface) is one of the most important technologies in WWW technology and has an irreplaceable important position. CGI is an interface standard between external applications (CGI programs) and WEB servers, and is a process of transferring information between CGI programs and Web servers. The CGI specification allows Web servers to execute external programs and send their output to a Web browser. CGI turns a set of simple static hypermedia documents on the Web into a complete new interactive media. Common Gateway Interface, CGI for short. Physically, it is a piece of program that runs on the server and provides an interface with the client’s HTML page. It may not be easy to understand this way. So let’s look at a practical example: most of the current personal homepages have a guestbook. The job of the guestbook is as follows: First, the user enters some information on the client, such as comments. Then the user clicks “Publish or Submit” (the work has been done on the client so far), the browser transmits this information to the specific CGI program in the CGI directory of the server, and the CGI program is processed on the server according to a predetermined method . In this case, the information submitted by the user is stored in the specified file. Then the CGI program sends a message to the client, indicating that the requested task has ended. At this time, the user will see the words “message end” in the browser. The whole process is over.