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57 RT::Shredder - Permanently wipeout data from RT
64 rt-shredder --force --plugin 'Tickets=queue,general;status,deleted'
69 RT::Shredder is extension to RT which allows you to permanently wipeout
70 data from the RT database. Shredder supports the wiping of almost
71 all RT objects (Tickets, Transactions, Attachments, Users...).
74 =head2 "Delete" vs "Wipeout"
76 RT uses the term "delete" to mean "deactivate". To avoid confusion,
77 RT::Shredder uses the term "Wipeout" to mean "permanently erase" (or
78 what most people would think of as "delete").
81 =head2 Why do you want this?
83 Normally in RT, "deleting" an item simply deactivates it and makes it
84 invisible from view. This is done to retain full history and
85 auditability of your tickets. For most RT users this is fine and they
86 have no need of RT::Shredder.
88 But in some large and heavily used RT instances the database can get
89 clogged up with junk, particularly spam. This can slow down searches
90 and bloat the size of the database. For these users, RT::Shredder
91 allows them to completely clear the database of this unwanted junk.
93 An additional use of Shredder is to obliterate sensitive information
94 (passwords, credit card numbers, ...) which might have made their way
98 =head2 Command line tools (CLI)
100 L<rt-shredder> is a program which allows you to wipe objects from
101 command line or with system tasks scheduler (cron, for example).
102 See also 'rt-shredder --help'.
105 =head2 Web based interface (WebUI)
107 Shredder's WebUI integrates into RT's WebUI. You can find it in the
108 Configuration->Tools->Shredder tab. The interface is similar to the
109 CLI and gives you the same functionality. You can find 'Shredder' link
110 at the bottom of tickets search results, so you could wipeout tickets
111 in the way similar to the bulk update.
114 =head1 DATA STORAGE AND BACKUPS
116 Shredder allows you to store data you wiped in files as scripts with SQL
119 =head3 Restoring from backup
121 Should you wipeout something you did not intend to the objects can be
122 restored by using the storage files. These files are a simple set of
123 SQL commands to re-insert your objects into the RT database.
125 1) Locate the appropriate shredder SQL dump file. In the WebUI, when
126 you use shredder, the path to the dump file is displayed. It also
127 gives the option to download the dump file after each wipeout. Or
128 it can be found in your C<$ShredderStoragePath>.
130 2) Load the shredder SQL dump into your RT database. The details will
131 be different for each database and RT configuration, consult your
132 database manual and RT config. For example, in MySQL...
134 mysql -u your_rt_user -p your_rt_database < /path/to/rt/var/data/shredder/dump.sql
136 That's it.i This will restore everything you'd deleted during a
137 shredding session when the file had been created.
141 =head2 $RT::DependenciesLimit
143 Shredder stops with an error if the object has more than
144 C<$RT::DependenciesLimit> dependencies. For example: a ticket has 1000
145 transactions or a transaction has 1000 attachments. This is protection
146 from bugs in shredder from wiping out your whole database, but
147 sometimes when you have big mail loops you may hit it.
151 You can change the default value, in F<RT_SiteConfig.pm> add C<Set(
152 $DependenciesLimit, new_limit );>
155 =head2 $ShredderStoragePath
157 Directory containing Shredder backup dumps.
159 Defaults to F</path-to-RT-var-dir/data/RT-Shredder>.
161 You can change the default value, in F<RT_SiteConfig.pm> add C<Set(
162 $ShredderStoragePath, new_path );> Be sure to use an absolute path.
165 =head1 INFORMATION FOR DEVELOPERS
169 L<RT::Shredder> is an extension to RT which adds shredder methods to
170 RT objects and classes. The API is not well documented yet, but you
171 can find usage examples in L<rt-shredder> and the
172 F<lib/t/regression/shredder/*.t> test files.
174 However, here is a small example that do the same action as in CLI
175 example from L</SYNOPSIS>:
178 RT::Shredder::Init( force => 1 );
179 my $deleted = RT::Tickets->new( $RT::SystemUser );
180 $deleted->{'allow_deleted_search'} = 1;
181 $deleted->LimitQueue( VALUE => 'general' );
182 $deleted->LimitStatus( VALUE => 'deleted' );
183 while( my $t = $deleted->Next ) {
188 =head2 RT::Shredder class' API
190 L<RT::Shredder> implements interfaces to objects cache, actions on the
191 objects in the cache and backups storage.
195 our $VERSION = '0.04';
200 # I can't use 'use lib' here since it breakes tests
201 # because test suite uses old RT::Shredder setup from
204 ### after: push @INC, qw(@RT_LIB_PATH@);
205 push @INC, qw(/opt/rt3/local/lib /opt/rt3/lib);
206 use RT::Shredder::Constants;
207 use RT::Shredder::Exceptions;
211 require RT::Shredder::Record;
213 require RT::Shredder::ACE;
214 require RT::Shredder::Attachment;
215 require RT::Shredder::CachedGroupMember;
216 require RT::Shredder::CustomField;
217 require RT::Shredder::CustomFieldValue;
218 require RT::Shredder::GroupMember;
219 require RT::Shredder::Group;
220 require RT::Shredder::Link;
221 require RT::Shredder::Principal;
222 require RT::Shredder::Queue;
223 require RT::Shredder::Scrip;
224 require RT::Shredder::ScripAction;
225 require RT::Shredder::ScripCondition;
226 require RT::Shredder::Template;
227 require RT::Shredder::ObjectCustomFieldValue;
228 require RT::Shredder::Ticket;
229 require RT::Shredder::Transaction;
230 require RT::Shredder::User;
233 our @SUPPORTED_OBJECTS = qw(
248 ObjectCustomFieldValue
258 RT::Shredder::Init( %default_options );
260 C<RT::Shredder::Init()> should be called before creating an
261 RT::Shredder object. It iniitalizes RT and loads the RT
264 %default_options are passed to every C<<RT::Shredder->new>> call.
279 my $shredder = RT::Shredder->new(%options);
281 Construct a new RT::Shredder object.
283 There currently are no %options.
290 my $self = bless( {}, ref $proto || $proto );
298 $self->{'opt'} = { %opt, @_ };
299 $self->{'cache'} = {};
300 $self->{'resolver'} = {};
301 $self->{'dump_plugins'} = [];
304 =head4 CastObjectsToRecords( Objects => undef )
306 Cast objects to the C<RT::Record> objects or its ancesstors.
307 Objects can be passed as SCALAR (format C<< <class>-<id> >>),
308 ARRAY, C<RT::Record> ancesstors or C<RT::SearchBuilder> ancesstor.
310 Most methods that takes C<Objects> argument use this method to
311 cast argument value to list of records.
313 Returns an array of records.
317 my @objs = $shredder->CastObjectsToRecords(
318 Objects => [ # ARRAY reference
319 'RT::Attachment-10', # SCALAR or SCALAR reference
320 $tickets, # RT::Tickets object (isa RT::SearchBuilder)
321 $user, # RT::User object (isa RT::Record)
327 sub CastObjectsToRecords
330 my %args = ( Objects => undef, @_ );
333 my $targets = delete $args{'Objects'};
335 RT::Shredder::Exception->throw( "Undefined Objects argument" );
338 if( UNIVERSAL::isa( $targets, 'RT::SearchBuilder' ) ) {
339 #XXX: try to use ->_DoSearch + ->ItemsArrayRef in feature
340 # like we do in Record with links, but change only when
341 # more tests would be available
342 while( my $tmp = $targets->Next ) { push @res, $tmp };
343 } elsif ( UNIVERSAL::isa( $targets, 'RT::Record' ) ) {
345 } elsif ( UNIVERSAL::isa( $targets, 'ARRAY' ) ) {
346 foreach( @$targets ) {
347 push @res, $self->CastObjectsToRecords( Objects => $_ );
349 } elsif ( UNIVERSAL::isa( $targets, 'SCALAR' ) || !ref $targets ) {
350 $targets = $$targets if ref $targets;
351 my ($class, $id) = split /-/, $targets;
352 $class = 'RT::'. $class unless $class =~ /^RTx?::/i;
353 eval "require $class";
354 die "Couldn't load '$class' module" if $@;
355 my $obj = $class->new( $RT::SystemUser );
356 die "Couldn't construct new '$class' object" unless $obj;
358 unless ( $obj->id ) {
359 $RT::Logger->error( "Couldn't load '$class' object with id '$id'" );
360 RT::Shredder::Exception::Info->throw( 'CouldntLoadObject' );
362 die "Loaded object has different id" unless( $id eq $obj->id );
365 RT::Shredder::Exception->throw( "Unsupported type ". ref $targets );
372 =head4 PutObjects( Objects => undef )
374 Puts objects into cache.
376 Returns array of the cache entries.
378 See C<CastObjectsToRecords> method for supported types of the C<Objects>
386 my %args = ( Objects => undef, @_ );
389 for( $self->CastObjectsToRecords( Objects => delete $args{'Objects'} ) ) {
390 push @res, $self->PutObject( %args, Object => $_ )
396 =head4 PutObject( Object => undef )
398 Puts record object into cache and returns its cache entry.
400 B<NOTE> that this method support B<only C<RT::Record> object or its ancesstor
401 objects>, if you want put mutliple objects or objects represented by different
402 classes then use C<PutObjects> method instead.
409 my %args = ( Object => undef, @_ );
411 my $obj = $args{'Object'};
412 unless( UNIVERSAL::isa( $obj, 'RT::Record' ) ) {
413 RT::Shredder::Exception->throw( "Unsupported type '". (ref $obj || $obj || '(undef)')."'" );
416 my $str = $obj->_AsString;
417 return ($self->{'cache'}->{ $str } ||= { State => ON_STACK, Object => $obj } );
420 =head4 GetObject, GetState, GetRecord( String => ''| Object => '' )
422 Returns record object from cache, cache entry state or cache entry accordingly.
424 All three methods takes C<String> (format C<< <class>-<id> >>) or C<Object> argument.
425 C<String> argument has more priority than C<Object> so if it's not empty then methods
426 leave C<Object> argument unchecked.
428 You can read about possible states and their meanings in L<RT::Shredder::Constants> docs.
440 if( $args{'String'} && $args{'Object'} ) {
442 Carp::croak( "both String and Object args passed" );
444 return $args{'String'} if $args{'String'};
445 return $args{'Object'}->_AsString if UNIVERSAL::can($args{'Object'}, '_AsString' );
449 sub GetObject { return (shift)->GetRecord( @_ )->{'Object'} }
450 sub GetState { return (shift)->GetRecord( @_ )->{'State'} }
454 my $str = $self->_ParseRefStrArgs( @_ );
455 return $self->{'cache'}->{ $str };
458 =head3 Dependencies resolvers
460 =head4 PutResolver, GetResolvers and ApplyResolvers
462 TODO: These methods have no documentation.
475 unless( UNIVERSAL::isa( $args{'Code'} => 'CODE' ) ) {
476 die "Resolver '$args{Code}' is not code reference";
481 $self->{'resolver'}->{ $args{'BaseClass'} } ||= {}
482 )->{ $args{'TargetClass'} || '' } ||= []
484 unshift @$resolvers, $args{'Code'};
498 if( $args{'TargetClass'} && exists $self->{'resolver'}->{ $args{'BaseClass'} }->{ $args{'TargetClass'} } ) {
499 push @res, @{ $self->{'resolver'}->{ $args{'BaseClass'} }->{ $args{'TargetClass'} || '' } };
501 if( exists $self->{'resolver'}->{ $args{'BaseClass'} }->{ '' } ) {
502 push @res, @{ $self->{'resolver'}->{ $args{'BaseClass'} }->{''} };
511 my %args = ( Dependency => undef, @_ );
512 my $dep = $args{'Dependency'};
514 my @resolvers = $self->GetResolvers(
515 BaseClass => $dep->BaseClass,
516 TargetClass => $dep->TargetClass,
519 unless( @resolvers ) {
520 RT::Shredder::Exception::Info->throw(
522 error => "Couldn't find resolver for dependency '". $dep->AsString ."'",
527 BaseObject => $dep->BaseObject,
528 TargetObject => $dep->TargetObject,
529 ) foreach @resolvers;
538 while ( my ($k, $v) = each %{ $self->{'cache'} } ) {
539 next if $v->{'State'} & (WIPED | IN_WIPING);
540 $self->Wipeout( Object => $v->{'Object'} );
549 die "Couldn't begin transaction" unless $RT::Handle->BeginTransaction;
550 $mark = $self->PushDumpMark or die "Couldn't get dump mark";
551 $self->_Wipeout( @_ );
552 $self->PopDumpMark( Mark => $mark );
553 die "Couldn't commit transaction" unless $RT::Handle->Commit;
556 $RT::Handle->Rollback('force');
557 $self->RollbackDumpTo( Mark => $mark ) if $mark;
558 die $@ if RT::Shredder::Exception::Info->caught;
559 die "Couldn't wipeout object: $@";
566 my %args = ( CacheRecord => undef, Object => undef, @_ );
568 my $record = $args{'CacheRecord'};
569 $record = $self->PutObject( Object => $args{'Object'} ) unless $record;
570 return if $record->{'State'} & (WIPED | IN_WIPING);
572 $record->{'State'} |= IN_WIPING;
573 my $object = $record->{'Object'};
575 $self->DumpObject( Object => $object, State => 'before any action' );
577 unless( $object->BeforeWipeout ) {
578 RT::Shredder::Exception->throw( "BeforeWipeout check returned error" );
581 my $deps = $object->Dependencies( Shredder => $self );
583 WithFlags => DEPENDS_ON | VARIABLE,
584 Callback => sub { $self->ApplyResolvers( Dependency => $_[0] ) },
586 $self->DumpObject( Object => $object, State => 'after resolvers' );
589 WithFlags => DEPENDS_ON,
590 WithoutFlags => WIPE_AFTER | VARIABLE,
591 Callback => sub { $self->_Wipeout( Object => $_[0]->TargetObject ) },
593 $self->DumpObject( Object => $object, State => 'after wiping dependencies' );
596 $record->{'State'} |= WIPED; delete $record->{'Object'};
597 $self->DumpObject( Object => $object, State => 'after wipeout' );
600 WithFlags => DEPENDS_ON | WIPE_AFTER,
601 WithoutFlags => VARIABLE,
602 Callback => sub { $self->_Wipeout( Object => $_[0]->TargetObject ) },
604 $self->DumpObject( Object => $object, State => 'after late dependencies' );
609 sub ValidateRelations
614 foreach my $record( values %{ $self->{'cache'} } ) {
615 next if( $record->{'State'} & VALID );
616 $record->{'Object'}->ValidateRelations( Shredder => $self );
620 =head3 Data storage and backups
622 =head4 GetFileName( FileName => '<ISO DATETIME>-XXXX.sql', FromStorage => 1 )
624 Takes desired C<FileName> and flag C<FromStorage> then translate file name to absolute
627 * Default value of the C<FileName> option is C<< <ISO DATETIME>-XXXX.sql >>;
629 * if C<FileName> has C<XXXX> (exactly four uppercase C<X> letters) then it would be changed with digits from 0000 to 9999 range, with first one free value;
631 * if C<FileName> has C<%T> then it would be replaced with the current date and time in the C<YYYY-MM-DDTHH:MM:SS> format. Note that using C<%t> may still generate not unique names, using C<XXXX> recomended.
633 * if C<FromStorage> argument is true (default behaviour) then result path would always be relative to C<StoragePath>;
635 * if C<FromStorage> argument is false then result would be relative to the current dir unless it's already absolute path.
637 Returns an absolute path of the file.
640 # file from storage with default name format
641 my $fname = $shredder->GetFileName;
643 # file from storage with custom name format
644 my $fname = $shredder->GetFileName( FileName => 'shredder-XXXX.backup' );
646 # file with path relative to the current dir
647 my $fname = $shredder->GetFileName(
649 FileName => 'backups/shredder.sql',
652 # file with absolute path
653 my $fname = $shredder->GetFileName(
655 FileName => '/var/backups/shredder-XXXX.sql'
663 my %args = ( FileName => '', FromStorage => 1, @_ );
666 my $file = $args{'FileName'} || '%t-XXXX.sql';
667 if( $file =~ /\%t/i ) {
669 my $date_time = POSIX::strftime( "%Y%m%dT%H%M%S", gmtime );
670 $file =~ s/\%t/$date_time/gi;
673 # convert to absolute path
674 if( $args{'FromStorage'} ) {
675 $file = File::Spec->catfile( $self->StoragePath, $file );
676 } elsif( !File::Spec->file_name_is_absolute( $file ) ) {
677 $file = File::Spec->rel2abs( $file );
681 if( $file =~ /XXXX[^\/\\]*$/ ) {
682 my( $tmp, $i ) = ( $file, 0 );
686 $tmp =~ s/XXXX([^\/\\]*)$/sprintf("%04d", $i).$1/e;
687 } while( -e $tmp && $i < 9999 );
693 die "File '$file' exists, but is read-only";
696 unless( File::Spec->file_name_is_absolute( $file ) ) {
697 $file = File::Spec->rel2abs( $file );
701 my $dir = File::Spec->join( (File::Spec->splitpath( $file ))[0,1] );
702 unless( -e $dir && -d _) {
703 die "Base directory '$dir' for file '$file' doesn't exist";
706 die "Base directory '$dir' is not writable";
709 die "'$file' is not regular file";
717 Returns an absolute path to the storage dir. See
718 L<CONFIGURATION/$ShredderStoragePath>.
720 See also description of the L</GetFileName> method.
726 return scalar( RT->Config->Get('ShredderStoragePath') )
727 || File::Spec->catdir( $RT::VarPath, qw(data RT-Shredder) );
730 my %active_dump_state = ();
733 my %args = ( Object => undef, Name => 'SQLDump', Arguments => undef, @_ );
735 my $plugin = $args{'Object'};
737 require RT::Shredder::Plugin;
738 $plugin = RT::Shredder::Plugin->new;
739 my( $status, $msg ) = $plugin->LoadByName( $args{'Name'} );
740 die "Couldn't load dump plugin: $msg\n" unless $status;
742 die "Plugin is not of correct type" unless lc $plugin->Type eq 'dump';
744 if ( my $pargs = $args{'Arguments'} ) {
745 my ($status, $msg) = $plugin->TestArgs( %$pargs );
746 die "Couldn't set plugin args: $msg\n" unless $status;
749 my @applies_to = $plugin->AppliesToStates;
750 die "Plugin doesn't apply to any state" unless @applies_to;
751 $active_dump_state{ lc $_ } = 1 foreach @applies_to;
753 push @{ $self->{'dump_plugins'} }, $plugin;
760 my %args = (Object => undef, State => undef, @_);
761 die "No state passed" unless $args{'State'};
762 return unless $active_dump_state{ lc $args{'State'} };
764 foreach (@{ $self->{'dump_plugins'} }) {
765 next unless grep lc $args{'State'} eq lc $_, $_->AppliesToStates;
766 my ($state, $msg) = $_->Run( %args );
767 die "Couldn't run plugin: $msg" unless $state;
771 { my $mark = 1; # XXX: integer overflows?
775 foreach (@{ $self->{'dump_plugins'} }) {
776 my ($state, $msg) = $_->PushMark( Mark => $mark );
777 die "Couldn't push mark: $msg" unless $state;
783 foreach (@{ $self->{'dump_plugins'} }) {
784 my ($state, $msg) = $_->PushMark( @_ );
785 die "Couldn't pop mark: $msg" unless $state;
790 foreach (@{ $self->{'dump_plugins'} }) {
791 my ($state, $msg) = $_->RollbackTo( @_ );
792 die "Couldn't rollback to mark: $msg" unless $state;
802 =head2 Database transactions support
804 Since 0.03_01 RT::Shredder uses database transactions and should be
805 much safer to run on production servers.
809 Mainstream RT doesn't use FKs, but at least I posted DDL script that creates them
810 in mysql DB, note that if you use FKs then this two valid keys don't allow delete
811 Tickets because of bug in MySQL:
813 ALTER TABLE Tickets ADD FOREIGN KEY (EffectiveId) REFERENCES Tickets(id);
814 ALTER TABLE CachedGroupMembers ADD FOREIGN KEY (Via) REFERENCES CachedGroupMembers(id);
816 L<http://bugs.mysql.com/bug.php?id=4042>
818 =head1 BUGS AND HOW TO CONTRIBUTE
820 We need your feedback in all cases: if you use it or not,
821 is it works for you or not.
825 Don't skip C<make test> step while install and send me reports if it's fails.
826 Add your own tests, it's easy enough if you've writen at list one perl script
827 that works with RT. Read more about testing in F<t/utils.pl>.
831 Send reports to L</AUTHOR> or to the RT mailing lists.
835 Many bugs in the docs: insanity, spelling, gramar and so on.
836 Patches are wellcome.
840 Please, see Todo file, it has some technical notes
841 about what I plan to do, when I'll do it, also it
842 describes some problems code has.
846 Since RT-3.7 shredder is a part of the RT distribution.
847 Versions of the RTx::Shredder extension could
848 be downloaded from the CPAN. Those work with older
849 RT versions or you can find repository at
850 L<https://opensvn.csie.org/rtx_shredder>
854 Ruslan U. Zakirov <Ruslan.Zakirov@gmail.com>
858 This program is free software; you can redistribute
859 it and/or modify it under the same terms as Perl itself.
861 The full text of the license can be found in the
866 L<rt-shredder>, L<rt-validator>