362 lines
12 KiB
Perl
Executable File
362 lines
12 KiB
Perl
Executable File
#!/usr/bin/perl
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use strict;
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use vars qw(%maint %maintinfo);
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use LJ::Captcha qw{};
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use LJ::Blob qw{};
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use File::Temp qw{tempdir};
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use File::Path qw{rmtree};
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use File::Spec qw{};
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our ( $FakeUserId, $ClusterId, $Digits, $DigitCount,
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$ExpireThresUser, $ExpireThresNoUser );
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# Data for code-generation
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$Digits = "abcdefghkmnpqrstuvwzyz23456789";
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$DigitCount = length( $Digits );
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# Maximum age of answered captchas. this is just
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# for double-click protection.
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$ExpireThresUser = 2 * 60; # two minutes
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# 24 hours for captchas which were given out but not answered.
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# (they might leave their browser window open or something)
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$ExpireThresNoUser = 24 * 3600; # 1 day
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#####################################################################
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### F U N C T I O N S
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#####################################################################
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### Read a file in as a scalar and return it
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sub readfile ($) {
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my ( $filename ) = @_;
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open my $fh, "<$filename" or die "open: $filename: $!";
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local $/ = undef;
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my $data = <$fh>;
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return $data;
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}
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### Generate an n-character challenge code
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sub gencode ($) {
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my ( $digits ) = @_;
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my $code = '';
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for ( 1..$digits ) {
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$code .= substr( $Digits, int(rand($DigitCount)), 1 );
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}
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return $code;
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}
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#####################################################################
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### M A I N T E N A N C E T A S K S
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#####################################################################
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$maintinfo{gen_audio_captchas}{opts}{locking} = "per_host";
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$maint{gen_audio_captchas} = sub {
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my (
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$u, # Fake user record for Blob::put
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$dbh, # Database handle (writer)
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$count, # Count of currently-extant audio challenges
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$need, # How many we need to still create
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$make, # how many we're actually going to create this round
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$tmpdir, # Temporary working directory
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$code, # The generated challenge code
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$wav, # Wav file
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$data, # Wav file data
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$err, # Error-message ref for Blob::put calls
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$capid, # Captcha row id
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$anum, # Deseries-ifier value
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);
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print "-I- Generating new audio captchas...\n";
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$dbh = LJ::get_dbh({raw=>1}, "master") or die "Failed to get_db_writer()";
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$dbh->do("SET wait_timeout=28800");
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# Count how many challenges there are currently
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$count = $dbh->selectrow_array(q{
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SELECT COUNT(*)
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FROM captchas
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WHERE
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type = 'audio'
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AND issuetime = 0
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});
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my $MaxItems = $LJ::CAPTCHA_AUDIO_PREGEN || 500;
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# If there are enough, don't generate any more
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print "Current count is $count of $MaxItems...";
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if ( $count >= $MaxItems ) {
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print "already have enough.\n";
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return;
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} else {
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$make = $need = $MaxItems - $count;
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$make = $LJ::CAPTCHA_AUDIO_MAKE
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if defined $LJ::CAPTCHA_AUDIO_MAKE && $make > $LJ::CAPTCHA_AUDIO_MAKE;
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print "generating $make new audio challenges.\n";
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}
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# Clean up any old audio directories lying about from failed generations
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# before. In theory, File::Temp::tempdir() is supposed to clean them up
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# itself, but it doesn't appear to be doing so.
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foreach my $olddir ( glob "audio_captchas_*" ) {
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# If it's been more than an hour since it's been changed from the
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# starting time of the script, kill it
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if ( (-M $olddir) * 24 > 1 ) {
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print "cleaning up old working temp directory ($olddir).\n";
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rmtree( $olddir ) or die "rmtree: $olddir: $!";
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}
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}
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# Load the system user for Blob::put() and create an auto-cleaning temp
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# directory for audio generation
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$u = LJ::load_user( "system" )
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or die "Couldn't load the system user.";
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$tmpdir = tempdir( "audio_captchas_XXXXXX", CLEANUP => 0 );
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# target location
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my $location = $LJ::CAPTCHA_MOGILEFS ? 'mogile' : 'blob';
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# Generate the challenges
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for ( my $i = 0; $i < $make; $i++ ) {
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print "Generating audio $i...";
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( $wav, $code ) = LJ::Captcha::generate_audio( $tmpdir );
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$data = readfile( $wav );
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unlink $wav or die "unlink: $wav: $!";
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# Generate the capid + anum
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print "generating new capid/anum...";
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$capid = LJ::alloc_global_counter( 'C' );
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die "Couldn't allocate capid" unless $capid;
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$anum = int( rand 65_535 );
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# Insert the blob
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print "uploading (capid = $capid, anum = $anum)...";
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if ($location eq 'mogile') {
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my $mogfs = LJ::mogclient(); # force load
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die "Requested to store captchas on MogileFS, but it's not loaded.\n"
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unless $mogfs;
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my $fh = $mogfs->new_file("captcha:$capid", 'captcha')
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or die "Unable to contact MogileFS server for storage.\n";
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$fh->print($data);
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$fh->close
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or die "Unable to save captcha to MogileFS server: $@\n";
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} else {
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LJ::Blob::put( $u, 'captcha_audio', 'wav', $capid, $data, \$err )
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or die "Error uploading to media server: $err";
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}
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# Insert the captcha into the DB. If it fails for some reason, delete
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# the just-uploaded file from the media storage system too.
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print "inserting (code = $code)...";
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my $rval = eval {
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$dbh->do(q{
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INSERT INTO captchas( capid, type, location, answer, anum )
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VALUES ( ?, 'audio', ?, ?, ? )
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}, undef, $capid, $location, $code, $anum);
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};
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if ( !$rval || $@ ) {
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my $err = $@ || $dbh->errstr;
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if ( $location eq 'mogile' ) {
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LJ::mogclient()->delete( "captcha:$capid" );
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} else {
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LJ::Blob::delete( $u, 'captcha_audio', 'wav', $capid );
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}
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die "audio captcha insert error on ($capid, $location, $code, $anum): $err";
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}
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print "done.\n";
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}
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print "cleaning up working temporary directory ($tmpdir).\n";
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rmtree( $tmpdir ) or die "Failed directory cleanup: $!";
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print "done. Created $make new audio captchas.\n";
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return 1;
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};
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$maintinfo{gen_image_captchas}{opts}{locking} = "per_host";
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$maint{gen_image_captchas} = sub {
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my (
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$u, # Fake user record for Blob::put
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$dbh, # Database handle (writer)
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$count, # Count of currently-extant audio challenges
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$need, # How many we need to still create
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$code, # The generated challenge code
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$png, # PNG data
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$err, # Error-message ref for Blob::put calls
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$capid, # Captcha row id
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$anum, # Deseries-ifier value
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);
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print "-I- Generating new image captchas...\n";
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$dbh = LJ::get_dbh({raw=>1}, "master") or die "Failed to get_db_writer()";
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$dbh->do("SET wait_timeout=28800");
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# Count how many challenges there are currently
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$count = $dbh->selectrow_array(q{
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SELECT COUNT(*)
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FROM captchas
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WHERE
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type = 'image'
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AND issuetime = 0
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});
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my $MaxItems = $LJ::CAPTCHA_IMAGE_PREGEN || 1000;
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# If there are enough, don't generate any more
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print "Current count is $count of $MaxItems...";
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if ( $count >= $MaxItems ) {
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print "already have enough.\n";
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return;
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} else {
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$need = $MaxItems - $count;
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print "generating $need new image challenges.\n";
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}
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# Load system user for Blob::put()
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$u = LJ::load_user( "system" )
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or die "Couldn't load the system user.";
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$dbh = LJ::get_db_writer() or die "Failed to get_db_writer()";
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# target location
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my $location = $LJ::CAPTCHA_MOGILEFS ? 'mogile' : 'blob';
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# Generate the challenges
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for ( my $i = 0; $i < $need; $i++ ) {
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print "Generating image $i...";
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$code = gencode( 7 );
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( $png ) = LJ::Captcha::generate_visual( $code );
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# Generate the capid + anum
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print "generating new capid/anum...";
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$capid = LJ::alloc_global_counter( 'C' );
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die "Couldn't allocate capid" unless $capid;
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$anum = int( rand 65_535 );
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# Insert the blob
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print "uploading (capid = $capid, anum = $anum)...";
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if ($location eq 'mogile') {
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my $mogfs = LJ::mogclient(); # force load
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die "Requested to store captchas on MogileFS, but it's not loaded.\n"
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unless $mogfs;
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my $fh = $mogfs->new_file("captcha:$capid", 'captcha')
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or die "Unable to contact MogileFS server for storage.\n";
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$fh->print($png);
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$fh->close
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or die "Unable to save captcha to MogileFS server: $@\n";
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} else {
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LJ::Blob::put( $u, 'captcha_image', 'png', $capid, $png, \$err )
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or die "Error uploading to media server: $err";
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}
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# Insert the captcha into the DB. If it fails for some reason, delete
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# the just-uploaded file from the media storage system too.
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print "inserting (code = $code)...";
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my $rval = eval {
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$dbh->do(q{
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INSERT INTO captchas( capid, type, location, answer, anum )
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VALUES ( ?, 'image', ?, ?, ? )
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}, undef, $capid, $location, $code, $anum);
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};
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if ( !$rval || $@ ) {
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my $err = $@ || $dbh->errstr;
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if ( $location eq 'mogile' ) {
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LJ::mogclient()->delete( "captcha:$capid" );
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} else {
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LJ::Blob::delete( $u, 'captcha_image', 'png', $capid );
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}
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die "image captcha insert error on ($capid, $location, $code, $anum): $err";
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}
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print "done.\n";
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}
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print "done. Created $need new image captchas.\n";
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return 1;
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};
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$maint{clean_captchas} = sub {
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my (
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$u, # System user
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$expired, # arrayref of arrayrefs of expired captchas
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$dbh, # Database handle (writer)
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$sql, # SQL statement
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$sth, # Statement handle
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$count, # Deletion count
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$err, # Error message reference for Blob::delete calls
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);
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print "-I- Cleaning captchas.\n";
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# Find captchas to delete
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$sql = q{
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SELECT
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capid, type, location
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FROM captchas
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WHERE
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( issuetime <> 0 AND issuetime < ? )
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OR
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( userid > 0
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AND ( issuetime <> 0 AND issuetime < ? )
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)
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LIMIT 2500
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};
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$dbh = LJ::get_db_writer()
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or die "No master DB handle";
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$expired = $dbh->selectall_arrayref( $sql, undef,
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time() - $ExpireThresNoUser,
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time() - $ExpireThresUser );
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die "selectall_arrayref: $sql: ", $dbh->errstr if $dbh->err;
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if ( @$expired ) {
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print "found ", scalar @$expired, " captchas to delete...\n";
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} else {
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print "Done: No captchas to delete.\n";
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return;
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}
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# Prepare deletion statement
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$sql = q{ DELETE FROM captchas WHERE capid = ? };
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$sth = $dbh->prepare( $sql );
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# Fetch system user
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$u = LJ::load_user( "system" )
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or die "Couldn't load the system user.";
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# Now delete each one from the DB and the media server
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foreach my $captcha ( @$expired ) {
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my ( $capid, $type, $location ) = @$captcha;
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$location ||= 'blob';
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print "Deleting captcha $capid ($type, $location)\n";
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my $ext = $type eq 'audio' ? 'wav' : 'png';
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if ($location eq 'mogile') {
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my $mogfs = LJ::mogclient(); # force load
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die "Requested to delete captchas from MogileFS, but it's not loaded.\n"
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unless $mogfs;
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$mogfs->delete("captcha:$capid")
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or die "Unable to delete captcha from MogileFS server for capid = $capid.\n";
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} else {
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LJ::Blob::delete( $u, "captcha_$type", $ext, $capid, \$err )
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or die "Failed to delete $type file from media server for ".
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"capid = $capid: $err";
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}
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$sth->execute( $capid )
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or die "execute: $sql ($capid): ", $sth->errstr;
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$count++;
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}
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print "Done: deleted $count expired captchas.\n";
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return 1;
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};
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