Created
May 8, 2013 03:45
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| #!/usr/bin/perl -w | |
| use strict; | |
| use CGI qw(:all); | |
| use CGI::Carp qw(fatalsToBrowser); | |
| my($requested_color, $old_color, $color_cookie) = ("",""); | |
| $old_color="blue"; # Default value | |
| # Is there a new color requested? | |
| if(defined param('color')) { | |
| $requested_color = param('color'); | |
| } | |
| #What was the old color, if any ? | |
| if(defined cookie('bgcolor')) { | |
| $old_color = cookie('bgcolor'); | |
| } | |
| if($requested_color and ($old_color ne $requested_color)) { | |
| # Set the cookie in the browser | |
| $color_cookie = cookie(-name => 'bgcolor' , | |
| -value => $requested_color); | |
| print header(-cookie => $color_cookie); | |
| } else { | |
| # Nothing's changed, no need to set the cookie | |
| $requested_color = $old_color; | |
| print header; | |
| } | |
| print<<END_OF_HTML; | |
| <html> | |
| <head> | |
| <title>Set your background color</title> | |
| </head> | |
| <body bgcolor="$requested_color"> | |
| <form> | |
| <select name="color"> | |
| <option value='red'>Red</option> | |
| <option value='blue'>Blue</option> | |
| <option value='yellow'>Yellow</option> | |
| <option value='white'>White</option> | |
| </select> | |
| <input type="submit" value="Set the color" > | |
| </form> | |
| </body> | |
| </html> | |
| END_OF_HTML |
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