September 2002
Intermediate to advanced
544 pages
13h 6m
English
Content preview from Sams Teach Yourself CGI in 24 Hours, Second Edition
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Safe Programming
Now that you’ve looked at some of the common holes that can make it easy for crackers to break into your server, look at some good programming practices that can help ensure that your scripts are secure.
Running Shell Commands Without Using the Shell
I warned you of the dangers of using shell commands within your CGI scripts, and especially of the dangers of using user input in shell commands. Now I’m going to show you a method by which you can still run shell commands without running the risk of having the shell’s command-line parser examine the command you want to execute.
The risks associated with using shell commands involve the shell’s command-line parser. When the shell receives a command line, it interprets some characters ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.