[perl-win32-gui] Slashdot headline grabber

[Joe Stewart]

Here's a small Win32::GUI app I wrote to download headlines from Slashdot every
30 minutes. (If you're wondering why I used Socket.pm instead of LWP::Simple
it's because it saved me around 200 megabytes on the compiled version of the
script.)

-Joe

#!c:\\perl\\bin\\perl.exe

# Slashdot Headline Grabber for Win32
# by Joe Stewart

use Win32::GUI;
use Win32::Shell;
use Socket;

my $count;
my %stories;
my @keys;

my $maxsize = ([400,42]);
my $minsize = ([200,42]);
my $main = Win32::GUI::Window->new(-name => 'Main',
                                    -text => 'Slashdot Headlines',
                                    -width => 275,
                                    -height => 42,
                                    -maxsize => $maxsize,
                                    -minsize => $minsize);


my $label = new Win32::GUI::Label($main,
                                    -text => "Downloading Headlines...",
                                    -name => "Url", 
                                    -width => 350,
                                    -height => 42,
                                    -left => 40,
                                    -notify => 1);


my $button_back = new Win32::GUI::Button($main,
                                    -text => "<",
                                    -name => "Back",
                                    -width => 15,
                                    -left => 0,
                                    -height => 15);

my $button_fwd = new Win32::GUI::Button($main,
                                    -text => ">",
                                    -name => "Fwd",
                                    -width => 15,
                                    -left => 15,
                                    -height => 15);

$main->AddButton($button_back);
$main->AddButton($button_fwd);
$main->AddLabel($label);

my $Cycle = $main->AddTimer("Cycle", 10000);
my $Reload = $main->AddTimer("Reload", 1800000);

$main->Show();

GUI::Update($main);

my $inet = inet_aton('www.slashdot.org');
my $proto=getprotobyname('tcp');

&fetch_headlines;

$main->Url->Text($stories{$keys[0]});
$Cycle->Interval(10000);

Win32::GUI::Dialog();

sub Main_Terminate {
        -1;
}

sub Fwd_Click {
 $count++;
 $count = 0 if $count == scalar(@keys);
 $main->Url->Text($stories{$keys[$count]});
 $Cycle->Interval(10000);
}

sub Back_Click {
 $count--;
 $count = scalar(@keys) - 1 if $count == -1;
 $main->Url->Text($stories{$keys[$count]});
 $Cycle->Interval(10000);
}


sub Url_DblClick {
  my $url = $keys[$count];
  Win32::Shell::Execute("open", $url, undef, undef, "SW_SHOWNORMAL");
  return 1;
}

sub fetch_headlines {
  my @D;
  socket(S,PF_INET,SOCK_STREAM,$proto) || return 0;
  if(connect(S,pack "SnA4x8",2,80,$inet)) {
    select(S);      
    $|=1;
    print "GET /slashdot.xml HTTP/1.0\n\n";    
    @D=<S>;
    select(STDOUT); 
    close(S);
  } else { return 0 } 
  
  my ($title, $url);

  for (@D) {
    $title = $1 if /\<title\>(.*)\<\/title\>/;
    $url = $1 if /\<url\>(.*)\<\/url\>/;

    if (/<\/story>/) { 
      $stories{$url} = $title;
      push(@keys, $url);
      $title = "";
      $url = "";
    }
  }
  return 1;
}

sub Cycle_Timer {
  &Fwd_Click;
  return 1;
}

sub Reload_TImer {
  &fetch_headlines;
  $Reload->Interval(1800000);
  return 1;
}