Internet Explorer screenshot using Perl and Win32::OLE

iescreenshot.pl

#!/usr/bin/env perl

use strict; use warnings;
use feature 'say';

use Const::Fast;
use Imager;
use Imager::Screenshot qw( screenshot );
use Win32::GuiTest qw( SetForegroundWindow );
use Win32::OLE qw(EVENTS valof);
$Win32::OLE::Warn = 3;

const my $TYPE => 'bmp';
const my $READYSTATE_COMPLETE => 4;

my ($URL) = @ARGV;
die "Need URL\n" unless defined $URL;

my $browser = Win32::OLE->new(
    "InternetExplorer.Application", sub { $_[0]->Quit }
);
Win32::OLE->WithEvents($browser, \&Event, 'DWebBrowserEvents2');

$browser->{Visible} = 1;
$browser->Navigate2($URL);

Win32::OLE->MessageLoop;

Win32::OLE->SpinMessageLoop;

$browser->Quit;

sleep 3;

sub Event {
    my ($browser, $event, @argv) = @_;

    if ($event eq 'DocumentComplete') {
        sleep 1;
        $browser->{ReadyState} == $READYSTATE_COMPLETE
            or return;

        my $hwnd = $browser->{HWND};
        SetForegroundWindow $hwnd;

        my $img = screenshot(hwnd => $hwnd, decor => 1)
            or die Imager->errstr;

        my $url = valof( $argv[1] );

        $url =~ s{^https?://}{};
        $url =~ s{[^A-Za-z0-9_-]}{-}g;

        $img->write(file => "$url.$TYPE", type => $TYPE)
            or die $img->errstr;

        Win32::OLE->QuitMessageLoop;
    }
    elsif ($event eq 'StatusTextChange') {
        say $browser->{StatusText};
    }
    else {
        say $event;
    }

    return;
}