X-Git-Url: https://git.sesse.net/?p=pr0n;a=blobdiff_plain;f=perl%2FSesse%2Fpr0n%2FCommon.pm;h=63190b14295aadc1d10df6d19d0480cd5e672eec;hp=4dca96a60d426e2e34185f28878aa80a297d39db;hb=060aaacf0d15a03ed7287cf81169f630a1a1f95b;hpb=e952fa06d546aa37de3c5b72e6e92656b28f232b diff --git a/perl/Sesse/pr0n/Common.pm b/perl/Sesse/pr0n/Common.pm index 4dca96a..63190b1 100644 --- a/perl/Sesse/pr0n/Common.pm +++ b/perl/Sesse/pr0n/Common.pm @@ -2,8 +2,9 @@ package Sesse::pr0n::Common; use strict; use warnings; -use Sesse::pr0n::Templates; use Sesse::pr0n::Overload; +use Sesse::pr0n::QscaleProxy; +use Sesse::pr0n::Templates; use Apache2::RequestRec (); # for $r->content_type use Apache2::RequestIO (); # for $r->print @@ -17,7 +18,9 @@ use DBI; use DBD::Pg; use Image::Magick; use POSIX; -use Digest::SHA1; +use Digest::MD5; +use Digest::SHA; +use Digest::HMAC_SHA1; use MIME::Base64; use MIME::Types; use LWP::Simple; @@ -25,6 +28,7 @@ use LWP::Simple; use Image::ExifTool; use HTML::Entities; use URI::Escape; +use File::Basename; BEGIN { use Exporter (); @@ -35,7 +39,7 @@ BEGIN { require Sesse::pr0n::Config_local; }; - $VERSION = "v2.65"; + $VERSION = "v2.80"; @ISA = qw(Exporter); @EXPORT = qw(&error &dberror); %EXPORT_TAGS = qw(); @@ -207,7 +211,7 @@ sub get_base { my $r = shift; return $r->dir_config('ImageBase'); } - + sub get_disk_location { my ($r, $id) = @_; my $dir = POSIX::floor($id / 256); @@ -227,6 +231,23 @@ sub get_cache_location { } } +sub ensure_disk_location_exists { + my ($r, $id) = @_; + my $dir = POSIX::floor($id / 256); + + my $img_dir = get_base($r) . "/images/$dir/"; + if (! -d $img_dir) { + $r->log->info("Need to create new image directory $img_dir"); + mkdir($img_dir) or die "Couldn't create new image directory $img_dir"; + } + + my $cache_dir = get_base($r) . "/cache/$dir/"; + if (! -d $cache_dir) { + $r->log->info("Need to create new cache directory $cache_dir"); + mkdir($cache_dir) or die "Couldn't create new image directory $cache_dir"; + } +} + sub get_mipmap_location { my ($r, $id, $width, $height) = @_; my $dir = POSIX::floor($id / 256); @@ -287,6 +308,10 @@ sub update_image_info { # Tags my @tags = $exiftool->GetValue('Keywords', 'ValueConv'); + if (scalar @tags == 0) { + # This is XMP-dc:Subject, an RDF bag of tags. + @tags = $exiftool->GetValue('Subject', 'ValueConv'); + } $dbh->do('DELETE FROM tags WHERE image=?', undef, $id) or die "Couldn't delete old tag information in SQL: $!"; @@ -302,7 +327,7 @@ sub update_image_info { # update the last_picture cache as well (this should of course be done # via a trigger, but this is less complicated :-) ) - $dbh->do('UPDATE last_picture_cache SET last_picture=GREATEST(last_picture, ?) WHERE (vhost,event)=(SELECT vhost,event FROM images WHERE id=?)', + $dbh->do('UPDATE last_picture_cache SET last_picture=GREATEST(last_picture, ?),last_update=CURRENT_TIMESTAMP WHERE (vhost,event)=(SELECT vhost,event FROM images WHERE id=?)', undef, $datetime, $id) or die "Couldn't update last_picture in SQL: $!"; } @@ -310,19 +335,186 @@ sub update_image_info { sub check_access { my $r = shift; + + #return qw(sesse Sesse); my $auth = $r->headers_in->{'authorization'}; - if (!defined($auth) || $auth !~ m#^Basic ([a-zA-Z0-9+/]+=*)$#) { + if (!defined($auth)) { + output_401($r); + return undef; + } + if ($auth =~ /^Basic ([a-zA-Z0-9+\/]+=*)$/) { + return check_basic_auth($r, $1); + } + if ($auth =~ /^Digest (.*)$/) { + return check_digest_auth($r, $1); + } + output_401($r); + return undef; +} + +sub output_401 { + my ($r, %options) = @_; + $r->content_type('text/plain; charset=utf-8'); + $r->status(401); + $r->headers_out->{'www-authenticate'} = 'Basic realm="pr0n.sesse.net"'; + + # Digest auth is disabled for now, due to various client problems. + if (0 && ($options{'DigestAuth'} // 1)) { + # We make our nonce similar to the scheme of RFC2069 section 2.1.1, + # with some changes: We don't care about client IP (these have a nasty + # tendency to change from request to request when load-balancing + # proxies etc. are being used), and we use HMAC instead of simple + # hashing simply because that's a better signing method. + # + # NOTE: For some weird reason, Digest::HMAC_SHA doesn't like taking + # the output from time directly (it gives a different response), so we + # forcefully stringify the argument. + my $ts = time; + my $nonce = Digest::HMAC_SHA->hmac_sha1_hex($ts . "", $Sesse::pr0n::Config::db_password); + my $stale_nonce_text = ""; + $stale_nonce_text = ", stale=\"true\"" if ($options{'StaleNonce'} // 0); + + $r->headers_out->{'www-authenticate'} = + "Digest realm=\"pr0n.sesse.net\", " . + "nonce=\"$nonce\", " . + "opaque=\"$ts\", " . + "qop=\"auth\"" . $stale_nonce_text; # FIXME: support auth-int + } + + $r->print("Need authorization\n"); +} + +sub check_basic_auth { + my ($r, $auth) = @_; + + my ($raw_user, $pass) = split /:/, MIME::Base64::decode_base64($auth); + my ($user, $takenby) = extract_takenby($raw_user); + + my $ref = $dbh->selectrow_hashref('SELECT sha1password,digest_ha1_hex FROM users WHERE username=? AND vhost=?', + undef, $user, $r->get_server_name); + if (!defined($ref) || $ref->{'sha1password'} ne Digest::SHA::sha1_base64($pass)) { $r->content_type('text/plain; charset=utf-8'); - $r->status(401); - $r->headers_out->{'www-authenticate'} = 'Basic realm="pr0n.sesse.net"'; - $r->print("Need authorization\n"); + $r->log->warn("Authentication failed for $user/$takenby"); + output_401($r); + return undef; + } + $r->log->info("Authentication succeeded for $user/$takenby"); + + # Make sure we can use Digest authentication in the future with this password. + my $ha1 = Digest::MD5::md5_hex($user . ':pr0n.sesse.net:' . $pass); + if (!defined($ref->{'digest_ha1_hex'}) || $ref->{'digest_ha1_hex'} ne $ha1) { + $dbh->do('UPDATE users SET digest_ha1_hex=? WHERE username=? AND vhost=?', + undef, $ha1, $user, $r->get_server_name) + or die "Couldn't update: " . $dbh->errstr; + $r->log->info("Updated Digest auth hash for for $user"); + } + + return ($user, $takenby); +} + +sub check_digest_auth { + my ($r, $auth) = @_; + + # We're a bit more liberal than RFC2069 in the parsing here, allowing + # quoted strings everywhere. + my %auth = (); + while ($auth =~ s/^ ([a-zA-Z]+) # key + = + ( + [^",]* # either something that doesn't contain comma or quotes + | + " ( [^"\\] | \\ . ) * " # or a full quoted string + ) + (?: (?: , \s* ) + | $ ) # delimiter(s), or end of string + //x) { + my ($key, $value) = ($1, $2); + if ($value =~ /^"(.*)"$/) { + $value = $1; + $value =~ s/\\(.)/$1/g; + } + $auth{$key} = $value; + } + unless (exists($auth{'username'}) && + exists($auth{'uri'}) && + exists($auth{'nonce'}) && + exists($auth{'opaque'}) && + exists($auth{'response'})) { + output_401($r); + return undef; + } + if ($r->uri ne $auth{'uri'}) { + output_401($r); return undef; } - #return qw(sesse Sesse); + # Verify that the opaque data does indeed look like a timestamp, and that the nonce + # is indeed a signed version of it. + if ($auth{'opaque'} !~ /^\d+$/) { + output_401($r); + return undef; + } + my $compare_nonce = Digest::HMAC_SHA1->hmac_sha1_hex($auth{'opaque'}, $Sesse::pr0n::Config::db_password); + if ($auth{'nonce'} ne $compare_nonce) { + output_401($r); + return undef; + } + + # Now look up the user's HA1 from the database, and calculate HA2. + my ($user, $takenby) = extract_takenby($auth{'username'}); + my $ref = $dbh->selectrow_hashref('SELECT digest_ha1_hex FROM users WHERE username=? AND vhost=?', + undef, $user, $r->get_server_name); + if (!defined($ref)) { + output_401($r); + return undef; + } + if (!defined($ref->{'digest_ha1_hex'}) || $ref->{'digest_ha1_hex'} !~ /^[0-9a-f]{32}$/) { + # A user that exists but has empty HA1 is a user that's not + # ready for digest auth, so we hack it and resend 401, + # only this time without digest auth. + output_401($r, DigestAuth => 0); + return undef; + } + my $ha1 = $ref->{'digest_ha1_hex'}; + my $ha2 = Digest::MD5::md5_hex($r->method . ':' . $auth{'uri'}); + my $response; + if (exists($auth{'qop'}) && $auth{'qop'} eq 'auth') { + unless (exists($auth{'nc'}) && exists($auth{'cnonce'})) { + output_401($r); + return undef; + } + + $response = $ha1; + $response .= ':' . $auth{'nonce'}; + $response .= ':' . $auth{'nc'}; + $response .= ':' . $auth{'cnonce'}; + $response .= ':' . $auth{'qop'}; + $response .= ':' . $ha2; + } else { + $response = $ha1; + $response .= ':' . $auth{'nonce'}; + $response .= ':' . $ha2; + } + if ($auth{'response'} ne Digest::MD5::md5_hex($response)) { + output_401($r); + return undef; + } + + # OK, everything is good, and there's only one thing we need to check: That the nonce + # isn't too old. If it is, but everything else is ok, we tell the browser that and it + # will re-encrypt with the new nonce. + my $timediff = time - $auth{'opaque'}; + if ($timediff < 0 || $timediff > 300) { + output_401($r, StaleNonce => 1); + return undef; + } + + return ($user, $takenby); +} + +sub extract_takenby { + my ($user) = shift; - my ($user, $pass) = split /:/, MIME::Base64::decode_base64($1); # WinXP is stupid :-) if ($user =~ /^.*\\(.*)$/) { $user = $1; @@ -335,22 +527,6 @@ sub check_access { } else { ($takenby = $user) =~ s/^([a-zA-Z])/uc($1)/e; } - - my $oldpass = $pass; - $pass = Digest::SHA1::sha1_base64($pass); - my $ref = $dbh->selectrow_hashref('SELECT count(*) AS auth FROM users WHERE username=? AND sha1password=? AND vhost=?', - undef, $user, $pass, $r->get_server_name); - if ($ref->{'auth'} != 1) { - $r->content_type('text/plain; charset=utf-8'); - warn "No user exists, only $auth"; - $r->status(401); - $r->headers_out->{'www-authenticate'} = 'Basic realm="pr0n.sesse.net"'; - $r->print("Authorization failed"); - $r->log->warn("Authentication failed for $user/$takenby"); - return undef; - } - - $r->log->info("Authentication succeeded for $user/$takenby"); return ($user, $takenby); } @@ -377,14 +553,17 @@ sub stat_image_from_id { } # Takes in an image ID and a set of resolutions, and returns (generates if needed) -# the smallest mipmap larger than the largest of them. +# the smallest mipmap larger than the largest of them, as well as the original image +# dimensions. sub make_mipmap { - my ($r, $filename, $id, $dbwidth, $dbheight, @res) = @_; + my ($r, $filename, $id, $dbwidth, $dbheight, $can_use_qscale, @res) = @_; my ($img, $mmimg, $width, $height); + + my $physical_fname = get_disk_location($r, $id); # If we don't know the size, we'll need to read it in anyway if (!defined($dbwidth) || !defined($dbheight)) { - $img = read_original_image($r, $id, $dbwidth, $dbheight); + $img = read_original_image($r, $filename, $id, $dbwidth, $dbheight, $can_use_qscale); $width = $img->Get('columns'); $height = $img->Get('rows'); } else { @@ -408,7 +587,7 @@ sub make_mipmap { my $large_enough = 1; for my $i (0..($#res/2)) { my ($xres, $yres) = ($res[$i*2], $res[$i*2+1]); - if ($xres > $new_mmwidth || $yres > $new_mmheight) { + if ($xres == -1 || $xres > $new_mmwidth || $yres > $new_mmheight) { $large_enough = 0; last; } @@ -429,13 +608,17 @@ sub make_mipmap { my $mmres = $mmlist[$i]; my $mmlocation = get_mipmap_location($r, $id, $mmres->[0], $mmres->[1]); - if (! -r $mmlocation or (-M $mmlocation > -M $filename)) { + if (! -r $mmlocation or (-M $mmlocation > -M $physical_fname)) { if (!defined($img)) { if (defined($last_good_mmlocation)) { - $img = Image::Magick->new; + if ($can_use_qscale) { + $img = Sesse::pr0n::QscaleProxy->new; + } else { + $img = Image::Magick->new; + } $img->Read($last_good_mmlocation); } else { - $img = read_original_image($r, $id, $dbwidth, $dbheight); + $img = read_original_image($r, $filename, $id, $dbwidth, $dbheight, $can_use_qscale); } } my $cimg; @@ -445,7 +628,7 @@ sub make_mipmap { $cimg = $img->Clone(); } $r->log->info("Making mipmap for $id: " . $mmres->[0] . " x " . $mmres->[1]); - $cimg->Resize(width=>$mmres->[0], height=>$mmres->[1], filter=>'Lanczos'); + $cimg->Resize(width=>$mmres->[0], height=>$mmres->[1], filter=>'Lanczos', 'sampling-factor'=>'1x1'); $cimg->Strip(); my $err = $cimg->write( filename => $mmlocation, @@ -458,34 +641,45 @@ sub make_mipmap { } if ($last && !defined($img)) { # OK, read in the smallest one - $img = Image::Magick->new; + if ($can_use_qscale) { + $img = Sesse::pr0n::QscaleProxy->new; + } else { + $img = Image::Magick->new; + } my $err = $img->Read($mmlocation); } } if (!defined($img)) { - $img = read_original_image($r, $id, $dbwidth, $dbheight); + $img = read_original_image($r, $filename, $id, $dbwidth, $dbheight, $can_use_qscale); + $width = $img->Get('columns'); + $height = $img->Get('rows'); } - return $img; + return ($img, $width, $height); } sub read_original_image { - my ($r, $id, $dbwidth, $dbheight) = @_; + my ($r, $filename, $id, $dbwidth, $dbheight, $can_use_qscale) = @_; - my $fname = get_disk_location($r, $id); + my $physical_fname = get_disk_location($r, $id); # Read in the original image - my $magick = new Image::Magick; + my $magick; + if ($can_use_qscale && ($filename =~ /\.jpeg$/i || $filename =~ /\.jpg$/i)) { + $magick = Sesse::pr0n::QscaleProxy->new; + } else { + $magick = Image::Magick->new; + } my $err; # ImageMagick can handle NEF files, but it does it by calling dcraw as a delegate. # The delegate support is rather broken and causes very odd stuff to happen when # more than one thread does this at the same time. Thus, we simply do it ourselves. - if ($fname =~ /\.nef$/i) { + if ($filename =~ /\.(nef|cr2)$/i) { # this would suffice if ImageMagick gets to fix their handling - # $fname = "NEF:$fname"; + # $physical_fname = "NEF:$physical_fname"; - open DCRAW, "-|", "dcraw", "-w", "-c", $fname + open DCRAW, "-|", "dcraw", "-w", "-c", $physical_fname or error("dcraw: $!"); $err = $magick->Read(file => \*DCRAW); close(DCRAW); @@ -499,28 +693,24 @@ sub read_original_image { #if (!$infobox) { # $magick->Set(colorspace=>'YCbCr'); #} - $err = $magick->Read($fname); + $err = $magick->Read($physical_fname); } if ($err) { - $r->log->warn("$fname: $err"); + $r->log->warn("$physical_fname: $err"); $err =~ /(\d+)/; if ($1 >= 400) { undef $magick; - error($r, "$fname: $err"); + error($r, "$physical_fname: $err"); } } # If we use ->[0] unconditionally, text rendering (!) seems to crash - my $img = (scalar @$magick > 1) ? $magick->[0] : $magick; - - my $width = $img->Get('columns'); - my $height = $img->Get('rows'); - - # Update the SQL database if it doesn't contain the required info - if (!defined($dbwidth) || !defined($dbheight)) { - $r->log->info("Updating width/height for $id: $width x $height"); - update_image_info($r, $id, $width, $height); + my $img; + if (ref($magick) !~ /Image::Magick/) { + $img = $magick; + } else { + $img = (scalar @$magick > 1) ? $magick->[0] : $magick; } return $img; @@ -529,9 +719,11 @@ sub read_original_image { sub ensure_cached { my ($r, $filename, $id, $dbwidth, $dbheight, $infobox, $xres, $yres, @otherres) = @_; + my ($new_dbwidth, $new_dbheight); + my $fname = get_disk_location($r, $id); if ($infobox ne 'box') { - unless (defined($xres) && (!defined($dbwidth) || !defined($dbheight) || $xres < $dbheight || $yres < $dbwidth || $xres == -1)) { + unless (defined($xres) && (!defined($dbwidth) || !defined($dbheight) || $xres < $dbwidth || $yres < $dbheight || $xres == -1)) { return ($fname, undef); } } @@ -556,9 +748,9 @@ sub ensure_cached { # This is slow, but should fortunately almost never happen, so don't bother # special-casing it. if (!defined($dbwidth) || !defined($dbheight)) { - $img = read_original_image($r, $id, $dbwidth, $dbheight); - $width = $img->Get('columns'); - $height = $img->Get('rows'); + $img = read_original_image($r, $filename, $id, $dbwidth, $dbheight, 0); + $new_dbwidth = $width = $img->Get('columns'); + $new_dbheight = $height = $img->Get('rows'); @$img = (); } else { $img = Image::Magick->new; @@ -596,8 +788,14 @@ sub ensure_cached { return ($cachename, 'image/png'); } - - my $img = make_mipmap($r, $fname, $id, $dbwidth, $dbheight, $xres, $yres, @otherres); + + my $can_use_qscale = 0; + if ($infobox eq 'nobox') { + $can_use_qscale = 1; + } + + my $img; + ($img, $new_dbwidth, $new_dbheight) = make_mipmap($r, $filename, $id, $dbwidth, $dbheight, $can_use_qscale, $xres, $yres, @otherres); while (defined($xres) && defined($yres)) { my ($nxres, $nyres) = (shift @otherres, shift @otherres); @@ -616,19 +814,12 @@ sub ensure_cached { my $height = $img->Get('rows'); my ($nwidth, $nheight) = scale_aspect($width, $height, $xres, $yres); - # Use lanczos (sharper) for heavy scaling, mitchell (faster) otherwise - my $filter = 'Mitchell'; - my $quality = 90; - my $sf = undef; - - if ($width / $nwidth > 8.0 || $height / $nheight > 8.0) { - $filter = 'Lanczos'; - $quality = 85; - $sf = "1x1"; - } + my $filter = 'Lanczos'; + my $quality = 87; + my $sf = "1x1"; if ($xres != -1) { - $cimg->Resize(width=>$nwidth, height=>$nheight, filter=>$filter); + $cimg->Resize(width=>$nwidth, height=>$nheight, filter=>$filter, 'sampling-factor'=>$sf); } if (($nwidth >= 800 || $nheight >= 600 || $xres == -1) && $infobox ne 'nobox') { @@ -671,6 +862,13 @@ sub ensure_cached { } } } + + # Update the SQL database if it doesn't contain the required info + if (!defined($dbwidth) && defined($new_dbwidth)) { + $r->log->info("Updating width/height for $id: $new_dbwidth x $new_dbheight"); + update_image_info($r, $id, $new_dbwidth, $new_dbheight); + } + return ($cachename, 'image/jpeg'); } @@ -690,10 +888,14 @@ sub make_infobox { # fields"; note the comma separation. Every field has an associated "bold flag" # in the second part. - my $shutter_priority = (defined($info->{'ExposureProgram'}) && + my $manual_shutter = (defined($info->{'ExposureProgram'}) && $info->{'ExposureProgram'} =~ /shutter\b.*\bpriority/i); - my $aperture_priority = (defined($info->{'ExposureProgram'}) && + my $manual_aperture = (defined($info->{'ExposureProgram'}) && $info->{'ExposureProgram'} =~ /aperture\b.*\bpriority/i); + if ($info->{'ExposureProgram'} =~ /manual/i) { + $manual_shutter = 1; + $manual_aperture = 1; + } my @classic_fields = (); if (defined($info->{'FocalLength'}) && $info->{'FocalLength'} =~ /^(\d+)(?:\.\d+)?\s*(?:mm)?$/) { @@ -705,24 +907,24 @@ sub make_infobox { if (defined($info->{'ExposureTime'}) && $info->{'ExposureTime'} =~ /^(\d+)\/(\d+)$/) { my ($a, $b) = ($1, $2); my $gcd = gcd($a, $b); - push @classic_fields, [ $a/$gcd . "/" . $b/$gcd . "s", $shutter_priority ]; - } elsif (defined($info->{'ExposureTime'}) && $info->{'ExposureTime'} =~ /^(\d+)$/) { - push @classic_fields, [ $1 . "s", $shutter_priority ]; + push @classic_fields, [ $a/$gcd . "/" . $b/$gcd . "s", $manual_shutter ]; + } elsif (defined($info->{'ExposureTime'}) && $info->{'ExposureTime'} =~ /^(\d+(?:\.\d+)?)$/) { + push @classic_fields, [ $1 . "s", $manual_shutter ]; } if (defined($info->{'FNumber'}) && $info->{'FNumber'} =~ /^(\d+)\/(\d+)$/) { my $f = $1/$2; if ($f >= 10) { - push @classic_fields, [ (sprintf "f/%.0f", $f), $aperture_priority ]; + push @classic_fields, [ (sprintf "f/%.0f", $f), $manual_aperture ]; } else { - push @classic_fields, [ (sprintf "f/%.1f", $f), $aperture_priority ]; + push @classic_fields, [ (sprintf "f/%.1f", $f), $manual_aperture ]; } } elsif (defined($info->{'FNumber'}) && $info->{'FNumber'} =~ /^(\d+)\.(\d+)$/) { my $f = $info->{'FNumber'}; if ($f >= 10) { - push @classic_fields, [ (sprintf "f/%.0f", $f), $aperture_priority ]; + push @classic_fields, [ (sprintf "f/%.0f", $f), $manual_aperture ]; } else { - push @classic_fields, [ (sprintf "f/%.1f", $f), $aperture_priority ]; + push @classic_fields, [ (sprintf "f/%.1f", $f), $manual_aperture ]; } } @@ -742,7 +944,7 @@ sub make_infobox { if (defined($info->{'ExposureBiasValue'}) && $info->{'ExposureBiasValue'} ne "0") { push @classic_fields, [ $info->{'ExposureBiasValue'} . " EV", 0 ]; - } elsif (defined($info->{'ExposureCompensation'}) && $info->{'ExposureCompensation'} != 0) { + } elsif (defined($info->{'ExposureCompensation'}) && $info->{'ExposureCompensation'} ne "0") { push @classic_fields, [ $info->{'ExposureCompensation'} . " EV", 0 ]; } @@ -853,7 +1055,7 @@ sub gcd { } sub add_new_event { - my ($dbh, $id, $date, $desc, $vhost) = @_; + my ($r, $dbh, $id, $date, $desc) = @_; my @errors = (); if (!defined($id) || $id =~ /^\s*$/ || $id !~ /^([a-zA-Z0-9-]+)$/) { @@ -870,12 +1072,14 @@ sub add_new_event { return @errors; } + my $vhost = $r->get_server_name; $dbh->do("INSERT INTO events (event,date,name,vhost) VALUES (?,?,?,?)", undef, $id, $date, $desc, $vhost) or return ("Kunne ikke sette inn ny hendelse" . $dbh->errstr); $dbh->do("INSERT INTO last_picture_cache (vhost,event,last_picture) VALUES (?,?,NULL)", undef, $vhost, $id) or return ("Kunne ikke sette inn ny cache-rad" . $dbh->errstr); + purge_cache($r, "/"); return (); } @@ -894,6 +1098,69 @@ sub guess_charset { return $decoded; } +# Depending on your front-end cache, you might want to get creative somehow here. +# This example assumes you have a front-end cache and it can translate an X-Pr0n-Purge +# regex tacked onto a request into something useful. The elements given in +# should not be regexes, though, as e.g. Squid will not be able to handle that. +sub purge_cache { + my ($r, @elements) = @_; + return if (scalar @elements == 0); + + my @pe = (); + for my $elem (@elements) { + $r->log->info("Purging $elem"); + (my $e = $elem) =~ s/[.+*|()]/\\$&/g; + push @pe, $e; + } + + my $regex = "^"; + if (scalar @pe == 1) { + $regex .= $pe[0]; + } else { + $regex .= "(" . join('|', @pe) . ")"; + } + $regex .= "(\\?.*)?\$"; + $r->headers_out->{'X-Pr0n-Purge'} = $regex; +} + +# Find a list of all cache URLs for a given image, given what we have on disk. +sub get_all_cache_urls { + my ($r, $dbh, $id) = @_; + my $dir = POSIX::floor($id / 256); + my @ret = (); + + my $q = $dbh->prepare('SELECT event, filename FROM images WHERE id=?') + or die "Couldn't prepare: " . $dbh->errstr; + $q->execute($id) + or die "Couldn't find event and filename: " . $dbh->errstr; + my $ref = $q->fetchrow_hashref; + my $event = $ref->{'event'}; + my $filename = $ref->{'filename'}; + $q->finish; + + my $base = get_base($r) . "cache/$dir"; + for my $file (<$base/$id-*>) { + my $fname = File::Basename::basename($file); + if ($fname =~ /^$id-mipmap-.*\.jpg$/) { + # Mipmaps don't have an URL, ignore + } elsif ($fname =~ /^$id--1--1\.jpg$/) { + push @ret, "/$event/$filename"; + } elsif ($fname =~ /^$id-(\d+)-(\d+)\.jpg$/) { + push @ret, "/$event/$1x$2/$filename"; + } elsif ($fname =~ /^$id-(\d+)-(\d+)-nobox\.jpg$/) { + push @ret, "/$event/$1x$2/nobox/$filename"; + } elsif ($fname =~ /^$id--1--1-box\.png$/) { + push @ret, "/$event/box/$filename"; + } elsif ($fname =~ /^$id-(\d+)-(\d+)-box\.png$/) { + push @ret, "/$event/$1x$2/box/$filename"; + } else { + $r->log->warn("Couldn't find a purging URL for $fname"); + } + } + + return @ret; +} + 1;