| 1 |
package Cache::CacheUtilities;
|
| 2 |
require 5.004;
|
| 3 |
use Data::Dumper;
|
| 4 |
BEGIN {
|
| 5 |
eval "use Compress::Zlib qw(gzopen);";
|
| 6 |
if ($@){$Cache::CacheUtilities::zipUntility="GZip";}
|
| 7 |
else{$Cache::CacheUtilities::zipUntility="CompressZLib";}
|
| 8 |
$Data::Dumper::Varname='cache';
|
| 9 |
}
|
| 10 |
|
| 11 |
sub read()
|
| 12 |
{
|
| 13 |
my ($file) = @_;
|
| 14 |
my $data=();
|
| 15 |
my $func="read${zipUntility}";
|
| 16 |
&$func($file,\$data);
|
| 17 |
my $cache = eval "$data";
|
| 18 |
die "Cache $file load error: ",$@,"\n", if ($@);
|
| 19 |
return $cache;
|
| 20 |
}
|
| 21 |
|
| 22 |
sub write()
|
| 23 |
{
|
| 24 |
my ($cache,$file)=@_;
|
| 25 |
use File::Copy;
|
| 26 |
if (-r $file){move($file,"${file}.bak");}
|
| 27 |
my $ok=1; my $err="";
|
| 28 |
my $fcache=();
|
| 29 |
eval {$fcache=Dumper($cache);};
|
| 30 |
if ($@){$err=$@;$ok=0;}
|
| 31 |
else
|
| 32 |
{
|
| 33 |
my $func="write${zipUntility}";
|
| 34 |
$ok = &$func($fcache,$file);
|
| 35 |
}
|
| 36 |
if ($ok)
|
| 37 |
{
|
| 38 |
unlink ("${file}.bak");
|
| 39 |
my $mode=0644;
|
| 40 |
chmod $mode,$file;
|
| 41 |
}
|
| 42 |
else
|
| 43 |
{
|
| 44 |
if (-r "${file}.bak"){move("${file}.bak",$file);}
|
| 45 |
die "ERROR: Writing Cache file $file: $err\n";
|
| 46 |
}
|
| 47 |
return;
|
| 48 |
}
|
| 49 |
|
| 50 |
###### Using gzip in case Compress::Zlib failed #################
|
| 51 |
sub readGZip()
|
| 52 |
{
|
| 53 |
my $file = shift;
|
| 54 |
my $data = shift;
|
| 55 |
my $gz;
|
| 56 |
if (open($gz,"gzip -cd $file |"))
|
| 57 |
{
|
| 58 |
binmode $gz;
|
| 59 |
my $buf;
|
| 60 |
while (read($gz,$buf,1024*1024) > 0){${$data}.=$buf;}
|
| 61 |
close($gz);
|
| 62 |
}
|
| 63 |
else{die "Can not open file for reading using \"gzip\": $file\n";}
|
| 64 |
return;
|
| 65 |
}
|
| 66 |
|
| 67 |
sub writeGZip()
|
| 68 |
{
|
| 69 |
my ($cache,$file) = @_;
|
| 70 |
my $gz;
|
| 71 |
if (open($gz,"| gzip >$file"))
|
| 72 |
{
|
| 73 |
binmode $gz;
|
| 74 |
print $gz $cache;
|
| 75 |
close($gz);
|
| 76 |
}
|
| 77 |
else{die "Can not open file for reading using \"gzip\": $file\n";}
|
| 78 |
return 1;
|
| 79 |
}
|
| 80 |
|
| 81 |
###### Using Compress::Zlib #################
|
| 82 |
sub readCompressZLib()
|
| 83 |
{
|
| 84 |
my $file = shift;
|
| 85 |
my $data = shift;
|
| 86 |
if (my $gz = gzopen($file, "rb"))
|
| 87 |
{
|
| 88 |
my $buf;
|
| 89 |
while ($gz->gzread($buf,1024*1024) > 0){${$data}.=$buf;}
|
| 90 |
$gz->gzclose();
|
| 91 |
}
|
| 92 |
else{die "Can not open file \"$file\" for reading: $!\n";}
|
| 93 |
return;
|
| 94 |
}
|
| 95 |
|
| 96 |
sub writeCompressZLib()
|
| 97 |
{
|
| 98 |
my ($cache,$file) = @_;
|
| 99 |
my $gz = gzopen($file, "wb");
|
| 100 |
if ($gz)
|
| 101 |
{
|
| 102 |
$gz->gzwrite($cache);
|
| 103 |
$gz->gzclose();
|
| 104 |
return 1;
|
| 105 |
}
|
| 106 |
return 0;
|
| 107 |
}
|
| 108 |
|
| 109 |
1;
|
