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| If you want to add a dynamic element to your web site then you can use Perl to generate web pages on the fly. The system you use is called CGI, Common Gateway Interface, and in this chapter you'll find details on how to use the interface within Perl. With the scripts provided in this chapter, you can learn how to write scripts that drive a dynamic, user driven website. You'll even find a script for an online book store! |
| Download: PC - Unix - Mac - Info |
| Chapter Script Status |
| Title | Script Name | Status |
| The CGI Environment |
webenv.pl |
No Change |
| Processing a GET Request |
cgiget.pl |
No Change |
| Processing a POST Request |
cgipost.pl |
No Change |
| Simple CGI Module |
SCGI.pm |
Script Update |
| Phone List |
phone.pl |
No Change |
| Web News Page Management Interface |
webnews.pl |
Script Update |
| Sending a File Directly via HTTP |
sendfile.pl |
No Change |
| Redirecting URL Requests |
redirect.pl |
No Change |
| The Bookware Online Book Shop |
bookstor.pl |
No Change |
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| SCGI Module Update |
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The SCGI module provides a simplified interface to both POST and GET methods for extracting information from forms. In it's original book state, the script made use of the $QUERY_LENGTH variable to determine the length of the supplied data for eithe method. However, it now turns out that many web servers do not populate this environment value when exchanging information with the CGI script.
Without modification, the original module may, in some cases, fail to recognize the existence of any information passed to it via a web form, especially on POST requests. The modification, available in this package fixes this problem.
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| Webnews Script Update |
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There were a number of minor problems with this script. Some are simple typos that have now been resolved. Others though are to do with the logic of the script, and with some Perl versions and under some situations the script will fail to work completely. I've tried to isolate the problems that people are experiencing and cleaned up the script a little. The updated version is available here
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