contrib/perl5/eg/cgi/customize.cgi

   1 #!/usr/local/bin/perl
   2
   3 use CGI qw(:standard :html3);
   4
   5 # Some constants to use in our form.
   6 @colors=qw/aqua black blue fuschia gray green lime maroon navy olive
   7     purple red silver teal white yellow/;
   8 @sizes=("<default>",1..7);
   9
  10 # recover the "preferences" cookie.
  11 %preferences = cookie('preferences');
  12
  13 # If the user wants to change the background color or her
  14 # name, they will appear among our CGI parameters.
  15 foreach ('text','background','name','size') {
  16     $preferences{$_} = param($_) || $preferences{$_};
  17 }
  18
  19 # Set some defaults
  20 $preferences{'background'} = $preferences{'background'} || 'silver';
  21 $preferences{'text'} = $preferences{'text'} || 'black';
  22
  23 # Refresh the cookie so that it doesn't expire.  This also
  24 # makes any changes the user made permanent.
  25 $the_cookie = cookie(-name=>'preferences',
  26                          -value=>\%preferences,
  27                          -expires=>'+30d');
  28 print header(-cookie=>$the_cookie);
  29
  30 # Adjust the title to incorporate the user's name, if provided.
  31 $title = $preferences{'name'} ?
  32     "Welcome back, $preferences{name}!" : "Customizable Page";
  33
  34 # Create the HTML page.  We use several of Netscape's
  35 # extended tags to control the background color and the
  36 # font size.  It's safe to use Netscape features here because
  37 # cookies don't work anywhere else anyway.
  38 print start_html(-title=>$title,
  39                  -bgcolor=>$preferences{'background'},
  40                  -text=>$preferences{'text'}
  41                  );
  42
  43 print basefont({SIZE=>$preferences{size}}) if $preferences{'size'} > 0;
  44
  45 print h1($title),<<END;
  46 You can change the appearance of this page by submitting
  47 the fill-out form below.  If you return to this page any time
  48 within 30 days, your preferences will be restored.
  49 END
  50     ;
  51
  52 # Create the form
  53 print hr(),
  54     start_form,
  55
  56     "Your first name: ",
  57     textfield(-name=>'name',
  58               -default=>$preferences{'name'},
  59               -size=>30),br,
  60
  61     table(
  62           TR(
  63              td("Preferred"),
  64              td("Page color:"),
  65              td(popup_menu(-name=>'background',
  66                            -values=>\@colors,
  67                            -default=>$preferences{'background'})
  68                 ),
  69              ),
  70           TR(
  71              td(''),
  72              td("Text color:"),
  73              td(popup_menu(-name=>'text',
  74                            -values=>\@colors,
  75                            -default=>$preferences{'text'})
  76                 )
  77              ),
  78           TR(
  79              td(''),
  80              td("Font size:"),
  81              td(popup_menu(-name=>'size',
  82                            -values=>\@sizes,
  83                            -default=>$preferences{'size'})
  84                 )
  85              )
  86           ),
  87
  88     submit(-label=>'Set preferences'),
  89     hr;
  90
  91 print a({HREF=>"/"},'Go to the home page');
  92 print end_html;