Look here when Chapter 6 of the book mentions something extra to be found on the web site.
Environment Variables:
Here is the
program which prints out a table showing the entire
%ENV hash (from the Apache server).
Decoding Routine:
Here is the final
decoding routine as shown in Section 6.10 of the book. Use this as a template for new programs which need to URL-decode incoming data. Note that this file is also supplied for download with the source code archives.
Manual Query String:
The links below send data to the
randomlinks.cgi program manually by attaching it as query strings to the URLs in the links as shown in Figure 6.6.
Send the empty string as data.
Send the integer 1000 as data.
Send the integer 4 as data.