13.1. CGI
A glance at comp.lang.perl.misc reveals that many people don't understand the difference between the CGI protocol and the Perl scripts that use it. We therefore consider it our civic duty to take the time to explain it here, even though we're talking about something that is not Perl. (That's the Perl connection—that it has nothing to do with Perl. It's all very Gödel-like.)
The Common Gateway Interface is a specification for how a Web server can deliver dynamic content. It says that you can have a URL that points not to a static file but to a program whose output will be sent to the browser. The user of the browser cannot tell the difference between a CGI program and a static file by looking at what the server returns; the only clue ...
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