| 16 |
|
# clear() : clear cache |
| 17 |
|
# filestore() : Return the directory to download files to |
| 18 |
|
# filename(url) : return a unique file/dir in cache for the given url |
| 19 |
+ |
# updatenumber(int) : return an integer number changed with each store |
| 20 |
|
|
| 21 |
|
package URL::URLcache; |
| 22 |
|
require 5.004; |
| 23 |
< |
use Utilities::HashDB; |
| 24 |
< |
|
| 24 |
< |
sub new { |
| 25 |
< |
my $class=shift; |
| 26 |
< |
$self={}; |
| 27 |
< |
bless $self, $class; |
| 28 |
< |
$self->init(@_); |
| 29 |
< |
return $self; |
| 30 |
< |
} |
| 31 |
< |
|
| 32 |
< |
sub filestore { |
| 33 |
< |
my $self=shift; |
| 34 |
< |
return $self->{cachedir}; |
| 35 |
< |
} |
| 36 |
< |
|
| 37 |
< |
sub filename { |
| 38 |
< |
my $self=shift; |
| 39 |
< |
my $url=shift; |
| 40 |
< |
|
| 41 |
< |
my $filenumber; |
| 42 |
< |
|
| 43 |
< |
my $file=$self->file($url); |
| 44 |
< |
if ( $file eq "" ) { |
| 45 |
< |
# need to generate a new filename - a random number will do |
| 46 |
< |
srand(); |
| 47 |
< |
do { |
| 48 |
< |
$filenumber=int(rand 9999999)+1; |
| 49 |
< |
$file=$self->filestore()."/".$filenumber; |
| 50 |
< |
} until ( ! ( -e $file ) ); |
| 51 |
< |
} |
| 52 |
< |
return $file; |
| 53 |
< |
} |
| 54 |
< |
|
| 55 |
< |
sub init { |
| 56 |
< |
my $self=shift; |
| 57 |
< |
$self->{cachetop}=shift; |
| 58 |
< |
$self->{cachedir}=$self->{cachetop}."/files"; |
| 59 |
< |
AddDir::adddir($self->{cachedir}); |
| 60 |
< |
|
| 61 |
< |
$self->{cacheindex}=$self->{cachetop}."/index.db"; |
| 62 |
< |
$self->{urlDB}=Utilities::HashDB->new(); |
| 63 |
< |
if ( -f $self->{cacheindex} ) { |
| 64 |
< |
$self->{urlDB}->restore($self->{cacheindex}); |
| 65 |
< |
} |
| 66 |
< |
else { |
| 67 |
< |
AddDir::adddir($self->{cachedir}); |
| 68 |
< |
} |
| 69 |
< |
} |
| 70 |
< |
|
| 71 |
< |
sub file { |
| 72 |
< |
my $self=shift; |
| 73 |
< |
my $url=shift; |
| 74 |
< |
|
| 75 |
< |
my @found=$self->{urlDB}->getdata($url); |
| 76 |
< |
return ( ($#found == -1)?"":$found[0]); |
| 77 |
< |
} |
| 78 |
< |
|
| 79 |
< |
sub delete { |
| 80 |
< |
my $self=shift; |
| 81 |
< |
my $url=shift; |
| 82 |
< |
unlink ($self->{urlDB}->getdata($URL)); |
| 83 |
< |
$self->{urlDB}->deletedata($url); |
| 84 |
< |
$self->{urlDB}->store($self->{cacheindex}); |
| 85 |
< |
} |
| 86 |
< |
|
| 87 |
< |
sub store { |
| 88 |
< |
my $self=shift; |
| 89 |
< |
my $url=shift; |
| 90 |
< |
my $file=shift; |
| 91 |
< |
|
| 92 |
< |
$self->{urlDB}->deletedata($url); |
| 93 |
< |
$self->{urlDB}->setdata($file,$url); |
| 94 |
< |
$self->{urlDB}->store($self->{cacheindex}); |
| 95 |
< |
} |
| 96 |
< |
|
| 97 |
< |
sub clear { |
| 98 |
< |
my $self=shift; |
| 99 |
< |
foreach $item ( $self->{urlDB}->match() ) { |
| 100 |
< |
$self->delete($item->keys()); |
| 101 |
< |
} |
| 102 |
< |
} |
| 23 |
> |
use Utilities::IndexedFileStore; |
| 24 |
> |
@ISA=qw(Utilities::IndexedFileStore) |
