cws2fws

flash swf file player

#!/usr/bin/perl -w
# ====================================================================
# Copyright (c) 2003 by Peter Liscovius. All rights reserved.
# This program is free software; you can redistribute it and/or modify
# it under the same terms as Perl itself.
# ====================================================================

use strict;
use Compress::Zlib;

if (!$ARGV[1]) {die("Flash decompression tool\nConverts compressed flashfiles to uncompressed flashfiles.\nusage: cws2fws infile.swf outfile.swf\n\n");} 

my $filein  = $ARGV[0];
my $fileout = $ARGV[1];

open(CWS,"<$filein") or die("Couldn't open $filein .\n");

#Turn off lineseparator character. We read binary data.
$/=undef;
my $header;
read(CWS,$header,8);
my $cwsfile=<CWS>;
my $unzip = uncompress($cwsfile) or die("Uncompression failed. Maybe not a compressed SWF or corrupt data?\n");
close CWS;

open (FWS,">$fileout") or die("Couldn't open $fileout .\n");
$header =~ s/^C/F/;
print FWS $header.$unzip;
close FWS;

my @header=unpack("C*",$header);
my $filesize=$header[4]+$header[5]*256+$header[6]*65536+$header[7]*16777216;
if ($filesize == -s $fileout){
  print "Decompression of compressed SWF-file seems to be successful.\n";
}
else {
  print "\nreal filesize: ".(-s $fileout);
  print "\nsize in swfheader: ".$filesize;
  print "\n\nFilesize of decompressed file is not equal with size number in the header the SWF!\nMaybe it wasn't a compressed SWF or the file is corrupt or modified.\n";
}