source: main/trunk/greenstone2/perllib/plugins/DirectoryPlugin.pm@ 23277

Last change on this file since 23277 was 23277, checked in by kjdon, 13 years ago

removed a commented out line

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1###########################################################################
2#
3# DirectoryPlugin.pm --
4# A component of the Greenstone digital library software
5# from the New Zealand Digital Library Project at the
6# University of Waikato, New Zealand.
7#
8# Copyright (C) 1999 New Zealand Digital Library Project
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2 of the License, or
13# (at your option) any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
21# along with this program; if not, write to the Free Software
22# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23#
24###########################################################################
25
26# DirectoryPlugin is a plugin which recurses through directories processing
27# each file it finds - which basically means passing it down the plugin
28# pipeline
29
30package DirectoryPlugin;
31
32use PrintInfo;
33use plugin;
34use util;
35use metadatautil;
36
37use File::Basename;
38use strict;
39no strict 'refs';
40no strict 'subs';
41
42use Encode;
43
44BEGIN {
45 @DirectoryPlugin::ISA = ('PrintInfo');
46}
47
48my $arguments =
49 [ { 'name' => "block_exp",
50 'desc' => "{BasePlugin.block_exp}",
51 'type' => "regexp",
52 'deft' => &get_default_block_exp(),
53 'reqd' => "no" },
54 # this option has been deprecated. leave it here for now so we can warn people not to use it
55 { 'name' => "use_metadata_files",
56 'desc' => "{DirectoryPlugin.use_metadata_files}",
57 'type' => "flag",
58 'reqd' => "no",
59 'hiddengli' => "yes" },
60 { 'name' => "recheck_directories",
61 'desc' => "{DirectoryPlugin.recheck_directories}",
62 'type' => "flag",
63 'reqd' => "no" } ];
64
65my $options = { 'name' => "DirectoryPlugin",
66 'desc' => "{DirectoryPlugin.desc}",
67 'abstract' => "no",
68 'inherits' => "yes",
69 'args' => $arguments };
70
71sub new {
72 my ($class) = shift (@_);
73 my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
74 push(@$pluginlist, $class);
75
76 push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
77 push(@{$hashArgOptLists->{"OptList"}},$options);
78
79 my $self = new PrintInfo($pluginlist, $inputargs, $hashArgOptLists);
80
81 if ($self->{'info_only'}) {
82 # don't worry about any options or initialisations etc
83 return bless $self, $class;
84 }
85
86 # we have left this option in so we can warn people who are still using it
87 if ($self->{'use_metadata_files'}) {
88 die "ERROR: DirectoryPlugin -use_metadata_files option has been deprecated. Please remove the option and add MetadataXMLPlug to your plugin list instead!\n";
89 }
90
91 $self->{'num_processed'} = 0;
92 $self->{'num_not_processed'} = 0;
93 $self->{'num_blocked'} = 0;
94 $self->{'num_archives'} = 0;
95
96 $self->{'subdir_extrametakeys'} = {};
97
98 return bless $self, $class;
99}
100
101# called once, at the start of processing
102sub init {
103 my $self = shift (@_);
104 my ($verbosity, $outhandle, $failhandle) = @_;
105
106 # verbosity is passed through from the processor
107 $self->{'verbosity'} = $verbosity;
108
109 # as are the outhandle and failhandle
110 $self->{'outhandle'} = $outhandle if defined $outhandle;
111 $self->{'failhandle'} = $failhandle;
112
113}
114
115# called once, after all passes have finished
116sub deinit {
117 my ($self) = @_;
118
119}
120
121# called at the beginning of each plugin pass (import has one, building has many)
122sub begin {
123 my $self = shift (@_);
124 my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
125
126 # Only lookup timestamp info for import.pl, and only if incremental is set
127 my $proc_package_name = ref $processor;
128 if ($proc_package_name !~ /buildproc$/ && $self->{'incremental'} == 1) {
129 # Get the infodbtype value for this collection from the arcinfo object
130 my $infodbtype = $processor->getoutputinfo()->{'infodbtype'};
131 $infodbtype = "gdbm" if $infodbtype eq "gdbm-txtgz"; # in archives, cannot use txtgz version
132 my $output_dir = $processor->getoutputdir();
133 my $archives_inf = &dbutil::get_infodb_file_path($infodbtype, "archiveinf-doc", $output_dir);
134
135 if ( -e $archives_inf ) {
136 $self->{'inf_timestamp'} = -M $archives_inf;
137 }
138 }
139}
140
141sub remove_all {
142 my $self = shift (@_);
143 my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
144
145}
146
147
148sub remove_one {
149 my $self = shift (@_);
150 my ($file, $oids, $archivedir) = @_;
151 return undef; # this will never be called for directories (will it??)
152
153}
154
155
156# called at the end of each plugin pass
157sub end {
158 my ($self) = shift (@_);
159
160}
161
162
163
164# return 1 if this class might recurse using $pluginfo
165sub is_recursive {
166 my $self = shift (@_);
167
168 return 1;
169}
170
171sub get_default_block_exp {
172 my $self = shift (@_);
173
174 return '(?i)(CVS|\.svn|Thumbs\.db|OIDcount|~)$';
175}
176
177sub check_directory_path {
178
179 my $self = shift(@_);
180 my ($dirname) = @_;
181
182 return undef unless (-d $dirname);
183
184 return 0 if ($self->{'block_exp'} ne "" && $dirname =~ /$self->{'block_exp'}/);
185
186 my $outhandle = $self->{'outhandle'};
187
188 # check to make sure we're not reading the archives or index directory
189 my $gsdlhome = quotemeta($ENV{'GSDLHOME'});
190 if ($dirname =~ m/^$gsdlhome\/.*?\/import.*?\/(archives|index)$/) {
191 print $outhandle "DirectoryPlugin: $dirname appears to be a reference to a Greenstone collection, skipping.\n";
192 return 0;
193 }
194
195 # check to see we haven't got a cyclic path...
196 if ($dirname =~ m%(/.*){,41}%) {
197 print $outhandle "DirectoryPlugin: $dirname is 40 directories deep, is this a recursive path? if not increase constant in DirectoryPlugin.pm.\n";
198 return 0;
199 }
200
201 # check to see we haven't got a cyclic path...
202 if ($dirname =~ m%.*?import/(.+?)/import/\1.*%) {
203 print $outhandle "DirectoryPlugin: $dirname appears to be in a recursive loop...\n";
204 return 0;
205 }
206
207 return 1;
208}
209
210# this may be called more than once
211sub sort_out_associated_files {
212
213 my $self = shift (@_);
214 my ($block_hash) = @_;
215 if (!scalar (keys %{$block_hash->{'shared_fileroot'}})) {
216 return;
217 }
218
219 $self->{'assocfile_info'} = {} unless defined $self->{'assocfile_info'};
220 my $metadata = $self->{'assocfile_info'};
221 foreach my $prefix (keys %{$block_hash->{'shared_fileroot'}}) {
222 my $record = $block_hash->{'shared_fileroot'}->{$prefix};
223
224 my $tie_to = $record->{'tie_to'};
225 my $exts = $record->{'exts'};
226
227 if ((defined $tie_to) && (scalar (keys %$exts) > 0)) {
228 # set up fileblocks and assocfile_tobe
229 my $base_file = "$prefix$tie_to";
230 $metadata->{$base_file} = {} unless defined $metadata->{$base_file};
231 my $base_file_metadata = $metadata->{$base_file};
232
233 $base_file_metadata->{'gsdlassocfile_tobe'} = [] unless defined $base_file_metadata->{'gsdlassocfile_tobe'};
234 my $assoc_tobe = $base_file_metadata->{'gsdlassocfile_tobe'};
235 foreach my $e (keys %$exts) {
236 # block the file
237 $block_hash->{'file_blocks'}->{"$prefix$e"} = 1;
238 # set up as an associatd file
239 print STDERR " $self->{'plugin_type'}: Associating $prefix$e with $tie_to version\n";
240 my $mime_type = ""; # let system auto detect this
241 push(@$assoc_tobe,"$prefix$e:$mime_type:");
242
243 }
244 }
245 } # foreach record
246
247 $block_hash->{'shared_fileroot'} = undef;
248 $block_hash->{'shared_fileroot'} = {};
249
250}
251
252
253# do block exp OR special blocking ???
254
255sub file_is_blocked {
256 my $self = shift (@_);
257 my ($block_hash, $filename_full_path) = @_;
258
259 if (defined $block_hash->{'file_blocks'}->{$filename_full_path}) {
260 $self->{'num_blocked'} ++;
261 return 1;
262 }
263 # check Directory plugin's own block_exp
264 if ($self->{'block_exp'} ne "" && $filename_full_path =~ /$self->{'block_exp'}/) {
265 $self->{'num_blocked'} ++;
266 return 1; # blocked
267 }
268 return 0;
269}
270
271
272
273sub file_block_read {
274 my $self = shift (@_);
275 my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $gli) = @_;
276
277 my $outhandle = $self->{'outhandle'};
278 my $verbosity = $self->{'verbosity'};
279
280 # Calculate the directory name and ensure it is a directory and
281 # that it is not explicitly blocked.
282 my $dirname = $file;
283 $dirname = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
284
285 my $directory_ok = $self->check_directory_path($dirname);
286 return $directory_ok unless (defined $directory_ok && $directory_ok == 1);
287
288 print $outhandle "Global file scan checking directory: $dirname\n";
289
290 $block_hash->{'all_files'} = {} unless defined $block_hash->{'all_files'};
291 $block_hash->{'metadata_files'} = {} unless defined $block_hash->{'metadata_files'};
292
293 $block_hash->{'file_blocks'} = {} unless defined $block_hash->{'file_blocks'};
294 $block_hash->{'shared_fileroot'} = {} unless defined $block_hash->{'shared_fileroot'};
295
296 # Recur over directory contents.
297 my (@dir, $subfile);
298 #my $count = 0;
299
300 print $outhandle "DirectoryPlugin block: getting directory $dirname\n" if ($verbosity > 2);
301
302 # find all the files in the directory
303 if (!opendir (DIR, $dirname)) {
304 if ($gli) {
305 print STDERR "<ProcessingError n='$file' r='Could not read directory $dirname'>\n";
306 }
307 print $outhandle "DirectoryPlugin: WARNING - couldn't read directory $dirname\n";
308 return -1; # error in processing
309 }
310 @dir = readdir (DIR);
311 closedir (DIR);
312
313 for (my $i = 0; $i < scalar(@dir); $i++) {
314 my $subfile = $dir[$i];
315 my $this_file_base_dir = $base_dir;
316 next if ($subfile =~ m/^\.\.?$/);
317
318 # Recursively read each $subfile
319 print $outhandle "DirectoryPlugin block recurring: $subfile\n" if ($verbosity > 2);
320
321 #$count += &plugin::file_block_read ($pluginfo, $this_file_base_dir,
322 &plugin::file_block_read ($pluginfo, $this_file_base_dir,
323 &util::filename_cat($file, $subfile),
324 $block_hash, $metadata, $gli);
325
326 }
327 $self->sort_out_associated_files($block_hash);
328 #return $count;
329
330}
331
332# We don't do metadata_read
333sub metadata_read {
334 my $self = shift (@_);
335 my ($pluginfo, $base_dir, $file, $block_hash,
336 $extrametakeys, $extrametadata, $extrametafile,
337 $processor, $gli, $aux) = @_;
338
339 return undef;
340}
341
342
343# return number of files processed, undef if can't process
344# Note that $base_dir might be "" and that $file might
345# include directories
346
347# This function passes around metadata hash structures. Metadata hash
348# structures are hashes that map from a (scalar) key (the metadata element
349# name) to either a scalar metadata value or a reference to an array of
350# such values.
351
352sub read {
353 my $self = shift (@_);
354 my ($pluginfo, $base_dir, $file, $block_hash, $in_metadata, $processor, $maxdocs, $total_count, $gli) = @_;
355
356 my $outhandle = $self->{'outhandle'};
357 my $verbosity = $self->{'verbosity'};
358
359 # Calculate the directory name and ensure it is a directory and
360 # that it is not explicitly blocked.
361 my $dirname;
362 if ($file eq "") {
363 $dirname = $base_dir;
364 } else {
365 $dirname = $file;
366 $dirname = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
367 }
368
369 my $directory_ok = $self->check_directory_path($dirname);
370 return $directory_ok unless (defined $directory_ok && $directory_ok == 1);
371
372 if (($verbosity > 2) && ((scalar keys %$in_metadata) > 0)) {
373 print $outhandle "DirectoryPlugin: metadata passed in: ",
374 join(", ", keys %$in_metadata), "\n";
375 }
376
377
378 # Recur over directory contents.
379 my (@dir, $subfile);
380
381 print $outhandle "DirectoryPlugin read: getting directory $dirname\n" if ($verbosity > 2);
382
383 # find all the files in the directory
384 if (!opendir (DIR, $dirname)) {
385 if ($gli) {
386 print STDERR "<ProcessingError n='$file' r='Could not read directory $dirname'>\n";
387 }
388 print $outhandle "DirectoryPlugin: WARNING - couldn't read directory $dirname\n";
389 return -1; # error in processing
390 }
391 @dir = readdir (DIR);
392 closedir (DIR);
393
394 # Re-order the files in the list so any directories ending with .all are moved to the end
395 for (my $i = scalar(@dir) - 1; $i >= 0; $i--) {
396 if (-d &util::filename_cat($dirname, $dir[$i]) && $dir[$i] =~ /\.all$/) {
397 push(@dir, splice(@dir, $i, 1));
398 }
399 }
400
401 # setup the metadata structures. we do a metadata_read pass to see if there is any additional metadata, then pass it to read
402
403 my $additionalmetadata = 0; # is there extra metadata available?
404 my %extrametadata; # maps from filespec to extra metadata keys
405 my %extrametafile; # maps from filespec to the metadata.xml (or similar) file it came from
406 my @extrametakeys; # keys of %extrametadata in order read
407
408
409 my $os_dirsep = &util::get_os_dirsep();
410 my $dirsep = &util::get_dirsep();
411 my $base_dir_regexp = $base_dir;
412 $base_dir_regexp =~ s/\//$os_dirsep/g;
413 my $local_dirname = $dirname;
414
415 $local_dirname =~ s/^$base_dir_regexp($os_dirsep)*//;
416 # if we are in import folder, then local_dirname will be empty
417 if ($local_dirname ne "") {
418 # look for extra metadata passed down from higher folders
419 $local_dirname .= $dirsep;
420 if (defined $self->{'subdir_extrametakeys'}->{$local_dirname}) {
421 my $extrakeys = $self->{'subdir_extrametakeys'}->{$local_dirname};
422 foreach my $ek (@$extrakeys) {
423 my $extrakeys_re = $ek->{'re'};
424 my $extrakeys_md = $ek->{'md'};
425 my $extrakeys_mf = $ek->{'mf'};
426 push(@extrametakeys,$extrakeys_re);
427 $extrametadata{$extrakeys_re} = $extrakeys_md;
428 $extrametafile{$extrakeys_re} = $extrakeys_mf;
429 }
430 delete($self->{'subdir_extrametakeys'}->{$local_dirname});
431 }
432 }
433 # apply metadata pass for each of the files in the directory -- ignore
434 # maxdocs here
435 my $num_files = scalar(@dir);
436 for (my $i = 0; $i < scalar(@dir); $i++) {
437 my $subfile = $dir[$i];
438 my $this_file_base_dir = $base_dir;
439 next if ($subfile =~ m/^\.\.?$/);
440 my $file_subfile = &util::filename_cat($file, $subfile);
441 my $full_filename = &util::filename_cat($this_file_base_dir, $file_subfile);
442 if ($self->file_is_blocked($block_hash,$full_filename)) {
443 print STDERR "DirectoryPlugin: file $full_filename was blocked for metadata_read\n" if ($verbosity > 2);
444 next;
445 }
446
447 # Recursively read each $subfile
448 print $outhandle "DirectoryPlugin metadata recurring: $subfile\n" if ($verbosity > 2);
449
450 &plugin::metadata_read ($pluginfo, $this_file_base_dir,
451 $file_subfile,$block_hash,
452 \@extrametakeys, \%extrametadata,
453 \%extrametafile,
454 $processor, $gli);
455 $additionalmetadata = 1;
456 }
457
458 # filter out any extrametakeys that mention subdirectories and store
459 # for later use (i.e. when that sub-directory is being processed)
460 foreach my $ek (@extrametakeys) {
461 my ($subdir_re,$extrakey_dir) = &File::Basename::fileparse($ek);
462 $extrakey_dir =~ s/\\\./\./g; # remove RE syntax for .
463 $extrakey_dir =~ s/\\\\/\\/g; # remove RE syntax for \
464
465 my $dirsep_re = &util::get_re_dirsep();
466
467 my $ek_non_re = $ek;
468 $ek_non_re =~ s/\\\./\./g; # remove RE syntax for .
469 $ek_non_re =~ s/\\\\/\\/g; # remove RE syntax for \
470 if ($ek_non_re =~ m/$dirsep_re/) { # specifies at least one directory
471 my $md = $extrametadata{$ek};
472 my $mf = $extrametafile{$ek};
473
474 my $subdir_extrametakeys = $self->{'subdir_extrametakeys'};
475
476 my $subdir_rec = { 're' => $subdir_re, 'md' => $md, 'mf' => $mf };
477
478 # when its looked up, it must be relative to the base dir
479 push(@{$subdir_extrametakeys->{"$local_dirname$extrakey_dir"}},$subdir_rec);
480 #push(@{$subdir_extrametakeys->{"$extrakey_dir"}},$subdir_rec);
481 }
482 }
483
484 # import each of the files in the directory
485 my $count=0;
486 for (my $i = 0; $i <= scalar(@dir); $i++) {
487 # When every file in the directory has been done, pause for a moment (figuratively!)
488 # If the -recheck_directories argument hasn't been provided, stop now (default)
489 # Otherwise, re-read the contents of the directory to check for new files
490 # Any new files are added to the @dir list and are processed as normal
491 # This is necessary when documents to be indexed are specified in bibliographic DBs
492 # These files are copied/downloaded and stored in a new folder at import time
493 if ($i == $num_files) {
494 last unless $self->{'recheck_directories'};
495
496 # Re-read the files in the directory to see if there are any new files
497 last if (!opendir (DIR, $dirname));
498 my @dirnow = readdir (DIR);
499 closedir (DIR);
500
501 # We're only interested if there are more files than there were before
502 last if (scalar(@dirnow) <= scalar(@dir));
503
504 # Any new files are added to the end of @dir to get processed by the loop
505 my $j;
506 foreach my $subfilenow (@dirnow) {
507 for ($j = 0; $j < $num_files; $j++) {
508 last if ($subfilenow eq $dir[$j]);
509 }
510 if ($j == $num_files) {
511 # New file
512 push(@dir, $subfilenow);
513 }
514 }
515 # When the new files have been processed, check again
516 $num_files = scalar(@dir);
517 }
518
519 my $subfile = $dir[$i];
520 my $this_file_base_dir = $base_dir;
521 last if ($maxdocs != -1 && ($count + $total_count) >= $maxdocs);
522 next if ($subfile =~ /^\.\.?$/);
523
524 my $file_subfile = &util::filename_cat($file, $subfile);
525 my $full_filename
526 = &util::filename_cat($this_file_base_dir,$file_subfile);
527
528 if ($self->file_is_blocked($block_hash,$full_filename)) {
529 print STDERR "DirectoryPlugin: file $full_filename was blocked for read\n" if ($verbosity > 2);
530 next;
531 }
532 #print STDERR "processing $full_filename\n";
533 # Follow Windows shortcuts
534 if ($subfile =~ /(?i)\.lnk$/ && $ENV{'GSDLOS'} =~ /^windows$/i) {
535 require Win32::Shortcut;
536 my $shortcut = new Win32::Shortcut(&util::filename_cat($dirname, $subfile));
537 if ($shortcut) {
538 # The file to be processed is now the target of the shortcut
539 $this_file_base_dir = "";
540 $file = "";
541 $subfile = $shortcut->Path;
542 }
543 }
544
545 # check for a symlink pointing back to a leading directory
546 if (-d "$dirname/$subfile" && -l "$dirname/$subfile") {
547 # readlink gives a "fatal error" on systems that don't implement
548 # symlinks. This assumes the the -l test above would fail on those.
549 my $linkdest=readlink "$dirname/$subfile";
550 if (!defined ($linkdest)) {
551 # system error - file not found?
552 warn "DirectoryPlugin: symlink problem - $!";
553 } else {
554 # see if link points to current or a parent directory
555 if ($linkdest =~ m@^[\./\\]+$@ ||
556 index($dirname, $linkdest) != -1) {
557 warn "DirectoryPlugin: Ignoring recursive symlink ($dirname/$subfile -> $linkdest)\n";
558 next;
559 ;
560 }
561 }
562 }
563
564 print $outhandle "DirectoryPlugin: preparing metadata for $subfile\n" if ($verbosity > 2);
565
566 # Make a copy of $in_metadata to pass to $subfile
567 my $out_metadata = {};
568 &metadatautil::combine_metadata_structures($out_metadata, $in_metadata);
569
570 # check the assocfile_info
571 if (defined $self->{'assocfile_info'}->{$full_filename}) {
572 &metadatautil::combine_metadata_structures($out_metadata, $self->{'assocfile_info'}->{$full_filename});
573 }
574 ## encode the filename as perl5 doesn't handle unicode filenames
575
576 my $tmpfile = Encode::encode_utf8($subfile);
577 # Next add metadata read in XML files (if it is supplied)
578 if ($additionalmetadata == 1) {
579 foreach my $filespec (@extrametakeys) {
580 ## use the utf8 encoded filename to do the filename comparison
581 if ($tmpfile =~ /^$filespec$/) {
582 print $outhandle "File \"$subfile\" matches filespec \"$filespec\"\n"
583 if ($verbosity > 2);
584 my $mdref = $extrametadata{$filespec};
585 my $mfref = $extrametafile{$filespec};
586
587 # Add the list files where the metadata came from
588 # into the metadata table so we can track this
589 # This mechanism is similar to how gsdlassocfile works
590
591 my @metafile_pair = ();
592 foreach my $l (keys %$mfref) {
593 my $f = $mfref->{$l};
594 push (@metafile_pair, "$f : $l");
595 }
596
597 $mdref->{'gsdlmetafile'} = \@metafile_pair;
598
599 &metadatautil::combine_metadata_structures($out_metadata, $mdref);
600 }
601 }
602 }
603
604 if (defined $self->{'inf_timestamp'}) {
605 # Look to see if it's a completely new file
606
607 if (!$block_hash->{'new_files'}->{$full_filename}) {
608 # Not a new file, must be an existing file
609 # Let' see if it's newer than the last import.pl
610
611
612 if (! -d $full_filename) {
613 if (!$block_hash->{'reindex_files'}->{$full_filename}) {
614 # filename has been around for longer than inf_timestamp
615 print $outhandle "**** Skipping $subfile\n" if ($verbosity >3);
616 next;
617 }
618 else {
619 # Remove old folder in archives (might hash to something different)
620 # *** should be doing this on a Del one as well
621 # but leave folder name?? and ensure hashs to
622 # same again??
623
624 # Then let through as new doc??
625
626 # mark to doc-oids that rely on it for re-indexing
627 }
628 }
629 }
630 }
631
632 # Recursively read each $subfile
633 print $outhandle "DirectoryPlugin recurring: $subfile\n" if ($verbosity > 2);
634
635 $count += &plugin::read ($pluginfo, $this_file_base_dir,
636 $file_subfile, $block_hash,
637 $out_metadata, $processor, $maxdocs, ($total_count + $count), $gli);
638 }
639
640 return $count;
641}
642
643sub compile_stats {
644 my $self = shift(@_);
645 my ($stats) = @_;
646}
647
6481;
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