| 1 |
# |
| 2 |
# -*- Perl -*- |
| 3 |
# $Id: gzip.pl,v 1.16 2000/03/23 10:41:04 knok Exp $ |
| 4 |
# Copyright (C) 2000 Namazu Project All rights reserved , |
| 5 |
# This is free software with ABSOLUTELY NO WARRANTY. |
| 6 |
# |
| 7 |
# This program is free software; you can redistribute it and/or modify |
| 8 |
# it under the terms of the GNU General Public License as published by |
| 9 |
# the Free Software Foundation; either versions 2, or (at your option) |
| 10 |
# any later version. |
| 11 |
# |
| 12 |
# This program is distributed in the hope that it will be useful |
| 13 |
# but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 |
# GNU General Public License for more details. |
| 16 |
# |
| 17 |
# You should have received a copy of the GNU General Public License |
| 18 |
# along with this program; if not, write to the Free Software |
| 19 |
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| 20 |
# 02111-1307, USA |
| 21 |
# |
| 22 |
# This file must be encoded in EUC-JP encoding |
| 23 |
# |
| 24 |
|
| 25 |
package gzip; |
| 26 |
use strict; |
| 27 |
require 'util.pl'; |
| 28 |
|
| 29 |
my $gzippath = undef; |
| 30 |
|
| 31 |
sub mediatype() { |
| 32 |
return ('application/x-gzip'); |
| 33 |
} |
| 34 |
|
| 35 |
sub status() { |
| 36 |
return 'yes' if (util::checklib('Compress/Zlib.pm')); |
| 37 |
$gzippath = util::checkcmd('gzip'); |
| 38 |
return 'yes' if (defined $gzippath); |
| 39 |
return 'no'; |
| 40 |
} |
| 41 |
|
| 42 |
sub recursive() { |
| 43 |
return 1; |
| 44 |
} |
| 45 |
|
| 46 |
sub pre_codeconv() { |
| 47 |
return 0; |
| 48 |
} |
| 49 |
|
| 50 |
sub post_codeconv () { |
| 51 |
return 0; |
| 52 |
} |
| 53 |
|
| 54 |
sub add_magic ($) { |
| 55 |
return; |
| 56 |
} |
| 57 |
|
| 58 |
sub filter ($$$$$) { |
| 59 |
my ($orig_cfile, $cont, $weighted_str, $headings, $fields) |
| 60 |
= @_; |
| 61 |
my $err = undef; |
| 62 |
|
| 63 |
if (util::checklib('Compress/Zlib.pm')) { |
| 64 |
$err = filter_xs($cont); |
| 65 |
} else { |
| 66 |
$err = filter_file($cont); |
| 67 |
} |
| 68 |
return $err; |
| 69 |
} |
| 70 |
|
| 71 |
sub filter_file ($) { |
| 72 |
my ($contref) = @_; |
| 73 |
|
| 74 |
my $tmpfile = util::tmpnam('NMZ.gzip'); |
| 75 |
my $fh = util::efopen("|$gzippath -cd > $tmpfile"); |
| 76 |
|
| 77 |
util::vprint("Processing gzip file ... (using '$gzippath')\n"); |
| 78 |
|
| 79 |
print $fh $$contref; |
| 80 |
undef $fh; |
| 81 |
$fh = util::efopen("$tmpfile"); |
| 82 |
my $size = util::filesize($fh); |
| 83 |
if ($size > $conf::FILE_SIZE_MAX) { |
| 84 |
return 'too_large_gzipped_file'; |
| 85 |
} |
| 86 |
$$contref = util::readfile($fh); |
| 87 |
$fh->close(); |
| 88 |
unlink($tmpfile); |
| 89 |
return undef; |
| 90 |
} |
| 91 |
|
| 92 |
sub filter_xs ($) { |
| 93 |
my ($contref) = @_; |
| 94 |
|
| 95 |
util::vprint("Processing gzip file ... (using Compress::Zlib)\n"); |
| 96 |
|
| 97 |
eval 'use Compress::Zlib;'; |
| 98 |
|
| 99 |
my $offset = 0; |
| 100 |
$offset += 3; |
| 101 |
my $flags = unpack('C', substr($$contref, $offset, 1)); |
| 102 |
$offset += 1; |
| 103 |
$offset += 6; |
| 104 |
$$contref = substr($$contref, $offset); |
| 105 |
$$contref = substr($$contref, 2) if ($flags & 0x04); |
| 106 |
$$contref =~ s/^[^\0]*\0// if ($flags & 0x08); |
| 107 |
$$contref =~ s/^[^\0]*\0// if ($flags & 0x10); |
| 108 |
$$contref = substr($$contref, 2) if ($flags & 0x02); |
| 109 |
|
| 110 |
my $zl = inflateInit(-WindowBits => - MAX_WBITS()); |
| 111 |
my ($inf, $stat) = $zl->inflate($$contref); |
| 112 |
if ($stat == Z_OK() or $stat == Z_STREAM_END()) { |
| 113 |
$$contref = $inf; |
| 114 |
} else { |
| 115 |
$$contref = ''; |
| 116 |
return 'Bad compressed data.'; |
| 117 |
} |
| 118 |
|
| 119 |
return undef; |
| 120 |
} |
| 121 |
|
| 122 |
1; |
Parent Directory
| 
Revision Log