ReadParse() - Parsing Web Form Input Values

This section describes functions provided in the CGI library, cgi-bin.pl. It also provides a tutorial example on how to use the ReadParse() to parse Web form input values and other functions.

If you look at the source code of cgi-bin.pl, you will see that it offers the following functions:

Here is a tutorial example on how to use functions provided in cgi-bin.pl:

#!c:/local/perl/bin/perl.exe
#- ReadParse_Test.pl
#- Copyright (c) 2014, HerongYang.com, All Rights Reserved.
#
require "cgi-lib.pl";
if (&ReadParse(*in)) {
   print &PrintHeader;
   print &HtmlTop("Input Values Received");
   print &PrintVariables(*in);
   print &HtmlBot;
} else {
   print &PrintHeader;
   print &HtmlTop("User Registration Form");
   print <<EOM;
<form method=POST>
<p>Username: <input name="username"><br>
Password: <input type=password name="password"></p>
<p><input type=submit></p>
</form>
EOM
   print &HtmlBot;
}

Save it at C:\local\apache\cgi-bin\ReadParse_Test.pl

And run it in a browser at: http://localhost/cgi-bin/ReadParse_Test.pl. Enter some values and click the "Submit Query" button to play with the form.

Last update: 2014.

Table of Contents

 About This Book

 Perl on Linux Systems

 ActivePerl on Windows Systems

 Data Types: Values and Variables

 Expressions, Operations and Simple Statements

 User Defined Subroutines

 Perl Built-in Debugger

 Name Spaces and Perl Module Files

 Symbolic (or Soft) References

 Hard References - Addresses of Memory Objects

 Objects (or References) and Classes (or Packages)

 Typeglob and Importing Identifiers from Other Packages

 String Built-in Functions and Performance

 File Handles and Data Input/Output

 Open Files in Binary Mode

 Open Directories and Read File Names

 File System Functions and Operations

 Converting Perl Script to Executable Binary

 Using DBM Database Files

 Using MySQL Database Server

 Socket Communication Over the Internet

 XML::Simple Module - XML Parser and Generator

 XML Communication Model

 SOAP::Lite - SOAP Server-Client Communication Module

 Perl Programs as IIS Server CGI Scripts

 CGI (Common Gateway Interface)

 XML-RPC - Remote Procedure Call with XML and HTTP

 RPC::XML - Perl Implementation of XML-RPC

Integrating Perl with Apache Web Server

 Downloading Apache HTTP Server 2.2.25 for Windows

 Installing Apache HTTP Server 2.2.25 on Windows

 Publishing HTML Documents as Web Pages

 Starting and Stopping Apache Server

 Running Perl Scripts in "cgi-bin"

 printenv.pl - Testing Perl CGI Environment

 500 Internal Server Error

 cgi-lib.pl - The Standard Library for CGI Scripts

ReadParse() - Parsing Web Form Input Values

 Running Perl Scripts in "htdocs"

 CGI.pm Module for Building Web Pages

 LWP::UserAgent and Web Site Testing

 References

 PDF Printing Version