#!/usr/bin/perl -w

# flashget - Download Flash videos from any hosting site.
# Usage: flashget [output directory default $HOME]
# Author: Kirsle
# http://sh.kirsle.net/

# This script doesn't care what your flash player is called. It just looks for
# any process that owns a /tmp/Flash####### file and copies it. It works for
# both the "old style" Netscape Flash plugin (for Firefox and Chromium) and the
# Pepper API style used in Google Chrome.

use strict;
use warnings;
use File::Copy;

my $home = shift @ARGV || (defined $ENV{HOME} ? $ENV{HOME} : ".");

print "flashget - Searching for Flash videos to rip. For best results, make sure\n"
	. "you FULLY BUFFER the video first in your web browser.\n\n";

my $count = 0;

# First, just do a dumb scan of everything in /proc that we have read-access to
# and look for Flash files belonging to either Chrome or the Firefox-style Flash
# plugin. Note that the Chrome Flash plugin locks us out of its file descriptors
# unless we run with root privileges.
opendir (my $proc, "/proc");
foreach my $pid (sort { $a <=> $b } (grep(/^\d+$/, readdir($proc)))) {
	# Skip PID's we can't read from.
	next unless -r "/proc/$pid/fd";

	# Look for flash videos.
	opendir (my $fd, "/proc/$pid/fd");
	foreach my $id (sort(grep(!/^\./, readdir($fd)))) {
		my $file = "/proc/$pid/fd/$id"; # Make it an abs path.
		if (-l $file) {
			my $link = readlink($file);

			# Look for a Flash video link.
			$link =~ s/\s*\(deleted\)//g; # Remove the " (deleted)" extensions.
			if ($link =~ m{^/tmp/(Flash.*?)$} || $link =~ m{Shockwave Flash/\.(.+?)$}) {
				# Copy it.
				my $dest = "$home/$1.flv";
				print "Recover from PID $pid: $id -> $dest\n";
				copy($file, $dest) or print "ERR: Couldn't copy to $dest: $@\n";
				$count++;
			}
		}
	}
	closedir($fd);
}
closedir ($proc);

print "\nRecovered $count Flash video(s).\n";

# Do a quick check for Google Chrome Flash processes that we didn't manage to
# get files from, to notify the user that they may want to re-run as root.
if ($> != 0) {
	my $ps = `ps aux | grep ppapi | grep -v grep`;
	if ($ps) {
		print "I found a few Google Chrome Flash plugins running, but I need\n"
			. "root permissions to read those files (unless you saw some files\n"
			. "named like 'com.google' above). Run this script as root to get\n"
			. "Flash videos out of Google Chrome.\n";
		print "$ps\n";
	}
}