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Revision 1.5 by root, Sun Mar 31 20:19:09 2002 UTC vs.
Revision 1.13 by root, Tue Oct 15 23:20:29 2002 UTC

2 2
3use Carp; 3use Carp;
4 4
5require Exporter; 5require Exporter;
6require DynaLoader; 6require DynaLoader;
7use AutoLoader;
8 7
9$VERSION = 0.21; 8$VERSION = 0.31;
10 9
11@ISA = qw(Exporter DynaLoader); 10@ISA = qw(Exporter DynaLoader);
12 11
13@_consts = qw( 12@_consts = qw(
14 ACT_COPYING ACT_DECODING ACT_ENCODING ACT_IDLE ACT_SCANNING 13 ACT_COPYING ACT_DECODING ACT_ENCODING ACT_IDLE ACT_SCANNING
19 MSG_ERROR MSG_FATAL MSG_MESSAGE MSG_NOTE MSG_PANIC MSG_WARNING 18 MSG_ERROR MSG_FATAL MSG_MESSAGE MSG_NOTE MSG_PANIC MSG_WARNING
20 19
21 OPT_BRACKPOL OPT_DEBUG OPT_DESPERATE OPT_DUMBNESS OPT_ENCEXT 20 OPT_BRACKPOL OPT_DEBUG OPT_DESPERATE OPT_DUMBNESS OPT_ENCEXT
22 OPT_ERRNO OPT_FAST OPT_IGNMODE OPT_IGNREPLY OPT_OVERWRITE OPT_PREAMB 21 OPT_ERRNO OPT_FAST OPT_IGNMODE OPT_IGNREPLY OPT_OVERWRITE OPT_PREAMB
23 OPT_PROGRESS OPT_SAVEPATH OPT_TINYB64 OPT_USETEXT OPT_VERBOSE 22 OPT_PROGRESS OPT_SAVEPATH OPT_TINYB64 OPT_USETEXT OPT_VERBOSE
24 OPT_VERSION OPT_REMOVE OPT_MOREMIME 23 OPT_VERSION OPT_REMOVE OPT_MOREMIME OPT_DOTDOT
25 24
26 RET_CANCEL RET_CONT RET_EXISTS RET_ILLVAL RET_IOERR RET_NODATA 25 RET_CANCEL RET_CONT RET_EXISTS RET_ILLVAL RET_IOERR RET_NODATA
27 RET_NOEND RET_NOMEM RET_OK RET_UNSUP 26 RET_NOEND RET_NOMEM RET_OK RET_UNSUP
28 27
29 B64ENCODED BH_ENCODED PT_ENCODED QP_ENCODED 28 B64_ENCODED BH_ENCODED PT_ENCODED QP_ENCODED
30 XX_ENCODED UU_ENCODED YENC_ENCODED 29 XX_ENCODED UU_ENCODED YENC_ENCODED
31); 30);
32 31
33@_funcs = qw( 32@_funcs = qw(
34 Initialize CleanUp GetOption SetOption strerror 33 Initialize CleanUp GetOption SetOption strerror SetMsgCallback
35 SetMsgCallback SetBusyCallback SetFileCallback 34 SetBusyCallback SetFileCallback SetFNameFilter SetFileNameCallback
36 SetFNameFilter FNameFilter LoadFile GetFileListItem 35 FNameFilter LoadFile GetFileListItem RenameFile DecodeToTemp
37 RenameFile DecodeToTemp RemoveTemp DecodeFile 36 RemoveTemp DecodeFile InfoFile Smerge QuickDecode EncodeMulti
38 InfoFile Smerge QuickDecode EncodeMulti EncodePartial 37 EncodePartial EncodeToStream EncodeToFile E_PrepSingle
39 EncodeToStream EncodeToFile E_PrepSingle E_PrepPartial 38 E_PrepPartial
40 39
41 straction strencoding strmsglevel 40 straction strencoding strmsglevel
42); 41);
43 42
44@EXPORT = @_consts; 43@EXPORT = @_consts;
68} 67}
69 68
70# encoding type -> string mapping 69# encoding type -> string mapping
71sub strencoding($) { 70sub strencoding($) {
72 return 'uuencode' if $_[0] == &UU_ENCODED; 71 return 'uuencode' if $_[0] == &UU_ENCODED;
73 return 'base64' if $_[0] == &B64ENCODED; 72 return 'base64' if $_[0] == &B64_ENCODED;
74 return 'yenc' if $_[0] == &YENC_ENCODED; 73 return 'yenc' if $_[0] == &YENC_ENCODED;
75 return 'binhex' if $_[0] == &BH_ENCODED; 74 return 'binhex' if $_[0] == &BH_ENCODED;
76 return 'plaintext' if $_[0] == &PT_ENCODED; 75 return 'plaintext' if $_[0] == &PT_ENCODED;
77 return 'quoted-printable' if $_[0] == &QP_ENCODED; 76 return 'quoted-printable' if $_[0] == &QP_ENCODED;
78 return 'xxencode' if $_[0] == &XX_ENCODED; 77 return 'xxencode' if $_[0] == &XX_ENCODED;
96 95
97Convert::UUlib - Perl interface to the uulib library (a.k.a. uudeview/uuenview). 96Convert::UUlib - Perl interface to the uulib library (a.k.a. uudeview/uuenview).
98 97
99=head1 SYNOPSIS 98=head1 SYNOPSIS
100 99
101 use Convert::UUlib;
102
103=head1 DESCRIPTION
104
105Read the file uulibdoc.dvi.gz and the example-decoder source. Sorry - more
106to come once people use me ;)
107
108=head1 SMALL EXAMPLE DECODER
109
110The following code excerpt is a minimal decoder program. It reads all
111files given on the commandline and decodes any files in it.
112
113 use Convert::UUlib ':all'; 100 use Convert::UUlib ':all';
114 101
102 # read all the files named on the commandline and decode them
103 # into the CURRENT directory. See below for a longer example.
115 LoadFile($_) for @ARGV; 104 LoadFile $_ for @ARGV;
116
117 for($i=0; $uu=GetFileListItem($i); $i++) { 105 for (my $i = 0; my $uu = GetFileListItem $i; $i++) {
118 $uu->decode if $uu->state & FILE_OK; 106 if ($uu->state & FILE_OK) {
107 $uu->decode;
108 print $uu->filename, "\n";
109 }
119 } 110 }
111
112=head1 DESCRIPTION
113
114Read the file doc/library.pdf from the distribution for in-depth
115information about the C-library used in this interface, and the rest of
116this document and especially the non-trivial decoder program at the end.
117
118=head1 EXPORTED CONSTANTS
119
120=head2 Action code constants
121
122 ACT_IDLE we don't do anything
123 ACT_SCANNING scanning an input file
124 ACT_DECODING decoding into a temp file
125 ACT_COPYING copying temp to target
126 ACT_ENCODING encoding a file
127
128=head2 Message severity levels
129
130 MSG_MESSAGE just a message, nothing important
131 MSG_NOTE something that should be noticed
132 MSG_WARNING important msg, processing continues
133 MSG_ERROR processing has been terminated
134 MSG_FATAL decoder cannot process further requests
135 MSG_PANIC recovery impossible, app must terminate
136
137=head2 Options
138
139 OPT_VERSION version number MAJOR.MINORplPATCH (ro)
140 OPT_FAST assumes only one part per file
141 OPT_DUMBNESS switch off the program's intelligence
142 OPT_BRACKPOL give numbers in [] higher precendence
143 OPT_VERBOSE generate informative messages
144 OPT_DESPERATE try to decode incomplete files
145 OPT_IGNREPLY ignore RE:plies (off by default)
146 OPT_OVERWRITE whether it's OK to overwrite ex. files
147 OPT_SAVEPATH prefix to save-files on disk
148 OPT_IGNMODE ignore the original file mode
149 OPT_DEBUG print messages with FILE/LINE info
150 OPT_ERRNO get last error code for RET_IOERR (ro)
151 OPT_PROGRESS retrieve progress information
152 OPT_USETEXT handle text messages
153 OPT_PREAMB handle Mime preambles/epilogues
154 OPT_TINYB64 detect short B64 outside of Mime
155 OPT_ENCEXT extension for single-part encoded files
156 OPT_REMOVE remove input files after decoding
157 OPT_MOREMIME strict MIME adherence
158 OPT_DOTDOT .. unescaping has not yet been done on input files
159
160=head2 Result/Error codes
161
162 RET_OK everything went fine
163 RET_IOERR I/O Error - examine errno
164 RET_NOMEM not enough memory
165 RET_ILLVAL illegal value for operation
166 RET_NODATA decoder didn't find any data
167 RET_NOEND encoded data wasn't ended properly
168 RET_UNSUP unsupported function (encoding)
169 RET_EXISTS file exists (decoding)
170 RET_CONT continue -- special from ScanPart
171 RET_CANCEL operation canceled
172
173=head2 File States
174
175 This code is zero, i.e. "false":
176
177 UUFILE_READ Read in, but not further processed
178
179 The following state codes are or'ed together:
180
181 FILE_MISPART Missing Part(s) detected
182 FILE_NOBEGIN No 'begin' found
183 FILE_NOEND No 'end' found
184 FILE_NODATA File does not contain valid uudata
185 FILE_OK All Parts found, ready to decode
186 FILE_ERROR Error while decoding
187 FILE_DECODED Successfully decoded
188 FILE_TMPFILE Temporary decoded file exists
189
190=head2 Encoding types
191
192 UU_ENCODED UUencoded data
193 B64_ENCODED Mime-Base64 data
194 XX_ENCODED XXencoded data
195 BH_ENCODED Binhex encoded
196 PT_ENCODED Plain-Text encoded (MIME)
197 QP_ENCODED Quoted-Printable (MIME)
198 YENC_ENCODED yEnc encoded (non-MIME)
199
200=head1 EXPORTED FUNCTIONS
201
202=head2 Initializing and cleanup
203
204Initialize is automatically called when the module is loaded and allocates
205quite a small amount of memory for todays machines ;) CleanUp releases that
206again.
207
208=over 4
209
210=item Initialize
211
212Not normally necessary, (re-)initializes the library.
213
214=item CleanUp
215
216Not normally necessary, could be called at the end to release memory
217before starting a new decoding round.
218
219=back
220
221=head2 Setting and querying options
222
223=over 4
224
225=item $option = GetOption OPT_xxx
226
227=item SetOption OPT_xxx, opt-value
228
229=back
230
231See the C<OPT_xxx> constants above to see which options exist.
232
233=head2 Setting various callbacks
234
235=over 4
236
237=item SetMsgCallback [callback-function]
238
239=item SetBusyCallback [callback-function]
240
241=item SetFileCallback [callback-function]
242
243=item SetFNameFilter [callback-function]
244
245=back
246
247=head2 Call the currently selected FNameFilter
248
249=over 4
250
251=item $file = FNameFilter $file
252
253=back
254
255=head2 Loading sourcefiles, optionally fuzzy merge and start decoding
256
257=over 4
258
259=item ($retval, $count) = LoadFile $fname, [$id, [$delflag]]
260
261Load the given file and scan it for encoded contents. Optionally tag it
262with the given id, and if C<$delflag> is true, delete the file after it is
263no longer necessary.
264
265=item $retval = Smerge $pass
266
267If you are desperate, try to call C<Smerge> with increasing C<$pass>
268values, beginning at C<0>, to try to merge parts that usually would not
269have been merged.
270
271Most probably this will result in garbled files, so never do this by
272default.
273
274=item $item = GetFileListItem $item_number
275
276Return the C<$item> structure for the C<$item_number>'th found file, or
277C<undef> of no file with that number exists.
278
279The first file has number C<0>, and the series has no holes, so you can
280iterate over all files by starting with zero and incrementing until you
281hit C<undef>.
282
283=back
284
285=head2 Decoding files
286
287=over 4
288
289=item $retval = $item->rename($newname)
290
291Change the ondisk filename where the decoded file will be saved.
292
293=item $retval = $item->decode_temp
294
295Decode the file into a temporary location, use C<< $item->infile >> to
296retrieve the temporary filename.
297
298=item $retval = $item->remove_temp
299
300Remove the temporarily decoded file again.
301
302=item $retval = $item->decode([$target_path])
303
304Decode the file to it's destination, or the given target path.
305
306=item $retval = $item->info(callback-function)
307
308=back
309
310=head2 Querying (and setting) item attributes
311
312=over 4
313
314=item $state = $item->state
315
316=item $mode = $item->mode([newmode])
317
318=item $uudet = $item->uudet
319
320=item $size = $item->size
321
322=item $filename = $item->filename([newfilename})
323
324=item $subfname = $item->subfname
325
326=item $mimeid = $item->mimeid
327
328=item $mimetype = $item->mimetype
329
330=item $binfile = $item->binfile
331
332=back
333
334=head2 Information about source parts
335
336=over 4
337
338=item $parts = $item->parts
339
340Return information about all parts (source files) used to decode the file
341as a list of hashrefs with the following structure:
342
343 {
344 partno => <integer describing the part number, starting with 1>,
345 # the following member sonly exist when they contain useful information
346 sfname => <local pathname of the file where this part is from>,
347 filename => <the ondisk filename of the decoded file>,
348 subfname => <used to cluster postings, possibly the posting filename>,
349 subject => <the subject of the posting/mail>,
350 origin => <the possible source (From) address>,
351 mimetype => <the possible mimetype of the decoded file>,
352 mimeid => <the id part of the Content-Type>,
353 }
354
355Usually you are interested mostly the C<sfname> and possibly the C<partno>
356and C<filename> members.
357
358=back
359
360=head2 Functions below not documented and not very well tested
361
362 QuickDecode
363 EncodeMulti
364 EncodePartial
365 EncodeToStream
366 EncodeToFile
367 E_PrepSingle
368 E_PrepPartial
369
370=head2 EXTENSION FUNCTIONS
371
372Functions found in this module but not documented in the uulib documentation:
373
374=over 4
375
376=item $msg = straction ACT_xxx
377
378Return a human readable string representing the given action code.
379
380=item $msg = strerror RET_xxx
381
382Return a human readable string representing the given error code.
383
384=item $str = strencoding xxx_ENCODED
385
386Return the name of the encoding type as a string.
387
388=item $str = strmsglevel MSG_xxx
389
390Returns the message level as a string.
391
392=item SetFileNameCallback $cb
393
394Sets (or queries) the FileNameCallback, which is called whenever the
395decoding library can't find a filename and wants to extract a filename
396from the subject line of a posting. The callback will be called with
397two arguments, the subject line and the current candidate for the
398filename. The latter argument can be C<undef>, which means that no
399filename could be found (and likely no one exists, so it is safe to also
400return C<undef> in this case). If it doesn't return anything (not even
401C<undef>!), then nothing happens, so this is a no-op callback:
402
403 sub cb {
404 return ();
405 }
406
407If it returns C<undef>, then this indicates that no filename could be
408found. In all other cases, the return value is taken to be the filename.
409
410This is a slightly more useful callback:
411
412 sub cb {
413 return unless $_[1]; # skip "Re:"-plies et al.
414 my ($subject, $filename) = @_;
415 # if we find some *.rar, take it
416 return $1 if $subject =~ /(\w+\.rar)/;
417 # otherwise just pass what we have
418 return ();
419 }
420
421=back
120 422
121=head1 LARGE EXAMPLE DECODER 423=head1 LARGE EXAMPLE DECODER
122 424
123This is the file C<example-decoder> from the distribution, put here 425This is the file C<example-decoder> from the distribution, put here
124instead of more thorough documentation. 426instead of more thorough documentation.
133 $path=~s/^.*[\/\\]//; 435 $path=~s/^.*[\/\\]//;
134 $path; 436 $path;
135 } 437 }
136 438
137 sub busycb { 439 sub busycb {
138 my($action,$curfile,$partno,$numparts,$percent,$fsize)=@_; 440 my ($action, $curfile, $partno, $numparts, $percent, $fsize) = @_;
139 $_[0]=straction($action); 441 $_[0]=straction($action);
140 print "busy_callback(",join(",",@_),")\n"; 442 print "busy_callback(", (join ",",@_), ")\n";
141 0; 443 0;
142 } 444 }
143 445
144 SetOption (OPT_IGNMODE, 1); 446 SetOption OPT_IGNMODE, 1;
145 SetOption (OPT_VERBOSE, 1); 447 SetOption OPT_VERBOSE, 1;
146 448
147 # show the three ways you can set callback functions 449 # show the three ways you can set callback functions. I normally
450 # prefer the one with the sub inplace.
148 SetFNameFilter (\&namefilter); 451 SetFNameFilter \&namefilter;
149 452
150 SetBusyCallback ("busycb",333); 453 SetBusyCallback "busycb", 333;
151 454
152 SetMsgCallback (sub { 455 SetMsgCallback sub {
153 my($msg,$level)=@_; 456 my ($msg, $level) = @_;
154 print uc(strmsglevel($_[1])),": $msg\n"; 457 print uc strmsglevel $_[1], ": $msg\n";
155 }); 458 };
156 459
460 # the following non-trivial FileNameCallback takes care
461 # of some subject lines not detected properly by uulib:
462 SetFileNameCallback sub {
463 return unless $_[1]; # skip "Re:"-plies et al.
464 local $_ = $_[0];
465
466 # the following rules are rather effective on some newsgroups,
467 # like alt.binaries.games.anime, where non-mime, uuencoded data
468 # is very common
469
470 # if we find some *.rar, take it as the filename
471 return $1 if /(\S{3,}\.(?:[rstuvwxyz]\d\d|rar))\s/i;
472
473 # one common subject format
474 return $1 if /- "(.{2,}?\..+?)" (?:yenc )?\(\d+\/\d+\)/i;
475
476 # - filename.par (04/55)
477 return $1 if /- "?(\S{3,}\.\S+?)"? (?:yenc )?\(\d+\/\d+\)/i;
478
479 # - (xxx) No. 1 sayuri81.jpg 756565 bytes
480 # - (20 files) No.17 Roseanne.jpg [2/2]
481 return $1 if /No\.[ 0-9]+ (\S+\....) (?:\d+ bytes )?\[/;
482
483 # otherwise just pass what we have
484 return ();
485 };
486
487 # now read all files in the directory uusrc/*
157 for(<uusrc/*>) { 488 for(<uusrc/*>) {
158 my($retval,$count)=LoadFile ($_,$_,1); 489 my($retval,$count)=LoadFile ($_, $_, 1);
159 print "file($_), status(",strerror($retval),") parts($count)\n"; 490 print "file($_), status(", strerror $retval, ") parts($count)\n";
160 } 491 }
161 492
162 SetOption (OPT_SAVEPATH, "uudst/"); 493 SetOption OPT_SAVEPATH, "uudst/";
163 494
495 # now wade through all files and their source parts
164 $i=0; 496 $i = 0;
165 while($uu=GetFileListItem($i)) { 497 while ($uu = GetFileListItem($i)) {
166 $i++; 498 $i++;
167 print "file nr. $i"; 499 print "file nr. $i";
168 print " state ",$uu->state; 500 print " state ", $uu->state;
169 print " mode ",$uu->mode; 501 print " mode ", $uu->mode;
170 print " uudet ",strencoding($uu->uudet); 502 print " uudet ", strencoding $uu->uudet;
171 print " size ",$uu->size; 503 print " size ", $uu->size;
172 print " filename ",$uu->filename; 504 print " filename ", $uu->filename;
173 print " subfname ",$uu->subfname; 505 print " subfname ", $uu->subfname;
174 print " mimeid ",$uu->mimeid; 506 print " mimeid ", $uu->mimeid;
175 print " mimetype ",$uu->mimetype; 507 print " mimetype ", $uu->mimetype;
176 print "\n"; 508 print "\n";
177 509
178 # print additional info about all parts 510 # print additional info about all parts
179 for($uu->parts) { 511 for ($uu->parts) {
180 while(my($k,$v)=each(%$_)) { 512 while (my ($k, $v) = each %$_) {
181 print "$k > $v, "; 513 print "$k > $v, ";
182 } 514 }
183 print "\n"; 515 print "\n";
184 } 516 }
185 517
186 $uu->decode_temp; 518 $uu->decode_temp;
187 print " temporarily decoded to ",$uu->binfile,"\n"; 519 print " temporarily decoded to ", $uu->binfile, "\n";
188 $uu->remove_temp; 520 $uu->remove_temp;
189 521
190 print strerror($uu->decode); 522 print strerror $uu->decode;
191 print " saved as uudst/",$uu->filename,"\n"; 523 print " saved as uudst/", $uu->filename, "\n";
192 } 524 }
193 525
194 print "cleanup...\n"; 526 print "cleanup...\n";
195 527
196 CleanUp(); 528 CleanUp();
197 529
198=head1 Exported constants
199
200Action code constants:
201
202 ACT_COPYING ACT_DECODING ACT_ENCODING
203 ACT_IDLE ACT_SCANNING
204
205File status flags:
206
207 FILE_DECODED FILE_ERROR FILE_MISPART
208 FILE_NOBEGIN FILE_NODATA FILE_NOEND
209 FILE_OK FILE_READ FILE_TMPFILE
210
211Message severity levels:
212
213 MSG_ERROR MSG_FATAL MSG_MESSAGE
214 MSG_NOTE MSG_PANIC MSG_WARNING
215
216Options:
217
218 OPT_BRACKPOL OPT_DEBUG OPT_DESPERATE OPT_DUMBNESS
219 OPT_ENCEXT OPT_ERRNO OPT_FAST OPT_IGNMODE
220 OPT_IGNREPLY OPT_OVERWRITE OPT_PREAMB OPT_PROGRESS
221 OPT_SAVEPATH OPT_TINYB64 OPT_USETEXT OPT_VERBOSE
222 OPT_VERSION OPT_REMOVE OPT_MOREMIME
223
224Error/Result codes:
225
226 RET_CANCEL RET_CONT RET_EXISTS RET_ILLVAL RET_IOERR
227 RET_NODATA RET_NOEND RET_NOMEM RET_OK RET_UNSUP
228
229Encoding types:
230
231 B64ENCODED BH_ENCODED PT_ENCODED
232 QP_ENCODED XX_ENCODED UU_ENCODED
233
234=head1 Exported functions
235
236Initializing and cleanup (Initialize is automatically called when the
237module is loaded and allocates quite a bit of memory. CleanUp releases
238that again).
239
240 Initialize; # not normally necessary
241 CleanUp; # could be called at the end to release memory
242
243Setting and querying options:
244
245 $option = GetOption OPT_xxx;
246 SetOption OPT_xxx, opt-value;
247
248Error and action values => stringified:
249
250 $msg = straction ACT_xxx;
251 $msg = strerror RET_xxx;
252
253Setting various callbacks:
254
255 SetMsgCallback [callback-function];
256 SetBusyCallback [callback-function];
257 SetFileCallback [callback-function];
258 SetFNameFilter [callback-function];
259
260Call the currently selected FNameFilter:
261
262 $file = FNameFilter $file;
263
264Loading sourcefiles, optionally fuzzy merge and start decoding:
265
266 ($retval, $count) = LoadFile $fname, [$id, [$delflag]];
267 $retval = Smerge $pass;
268 $item = GetFileListItem $item_number;
269
270The procedural interface is undocumented, use the following methods instead:
271
272 $retval = $item->rename($newname);
273 $retval = $item->decode_temp;
274 $retval = $item->remove_temp;
275 $retval = $item->decode([$target_path]);
276 $retval = $item->info(callback-function);
277
278Querying (and setting) item attributes:
279
280 $state = $item->state;
281 $mode = $item->mode([newmode]);
282 $uudet = $item->uudet;
283 $size = $item->size;
284 $filename = $item->filename([newfilename});
285 $subfname = $item->subfname;
286 $mimeid = $item->mimeid;
287 $mimetype = $item->mimetype;
288 $binfile = $item->binfile;
289
290Totally undocumented and unsupported(!):
291
292 $parts = $item->parts;
293
294Functions below not documented and not very well tested:
295
296 int QuickDecode () ;
297 int EncodeMulti () ;
298 int EncodePartial () ;
299 int EncodeToStream () ;
300 int EncodeToFile () ;
301 int E_PrepSingle () ;
302 int E_PrepPartial () ;
303
304=head1 AUTHOR 530=head1 AUTHOR
305 531
306Marc Lehmann <pcg@goof.com>, the original uulib library was written by 532Marc Lehmann <pcg@goof.com>, the original uulib library was written
307Frank Pilhofer <fp@informatik.uni-frankfurt.de>. 533by Frank Pilhofer <fp@informatik.uni-frankfurt.de>, and later heavily
534bugfixed by Marc Lehmann.
308 535
309=head1 SEE ALSO 536=head1 SEE ALSO
310 537
311perl(1), uudeview homepage at http://www.uni-frankfurt.de/~fp/uudeview/. 538perl(1), uudeview homepage at http://www.uni-frankfurt.de/~fp/uudeview/.
312 539

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