CGI (Common Gateway Interface) is a protocol used by web servers to interact with external programs or scripts. CGI software is a program or script that uses this protocol to generate dynamic web content such as forms, search engines, and shopping carts. While some web hosts offer CGI software as part of their hosting package, others may require users to install and configure their own CGI software.
In this article, we’ll explore the world of free CGI software, including what it is, how to use it, and where to find it. Whether you’re a web developer, designer, or simply someone looking to add dynamic features to your website, we’ve got you covered.
What is CGI?
CGI is a protocol that allows web servers to interact with external programs or scripts. When a user submits a form or clicks a link on a website, the web server sends a request to a CGI program or script. The CGI program then processes the request and returns a response to the web server, which in turn sends it back to the user’s web browser.
CGI programs can be written in a variety of programming languages, including Perl, Python, and Ruby. Some popular examples of CGI scripts include search engines, contact forms, and shopping carts.
How to Use CGI Software
Using CGI software is relatively simple, although it does require some basic programming knowledge. Here are the general steps involved:
- Choose a programming language: CGI programs can be written in a variety of programming languages, including Perl, Python, and Ruby. Choose a language that you are comfortable with and that is compatible with your web server.
- Write your program: Write a program that takes input from the user (such as a form submission) and generates a response (such as a confirmation page).
- Save your program: Save your program with a .cgi file extension in a directory on your web server that is configured to run CGI scripts.
- Set permissions: Set the permissions on your program to allow it to be executed by the web server.
- Test your program: Test your program by submitting a form or clicking a link on your website and verifying that the correct response is returned.
Where to Find Free CGI Software
There are many websites that offer free CGI software for download. Here are some of the most popular:
| Website | Description |
|---|---|
| GNU CGICC | A C++ library for writing CGI programs |
| Perl | A popular scripting language for writing CGI programs |
| Python | A high-level programming language for writing CGI programs |
| Ruby | A dynamic, object-oriented programming language for writing CGI programs |
It’s important to note that some web hosts may offer CGI software as part of their hosting package, so be sure to check with your web host before downloading and installing your own CGI software.
Conclusion
CGI software is a powerful tool for generating dynamic web content. Whether you’re a web developer, designer, or simply someone looking to add interactive features to your website, there are many free CGI software options available. By choosing a programming language, writing your program, and testing it on your web server, you can harness the power of CGI to create the web content you want.