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1 | # Net::NNTP.pm |
2 | # | |
3 | # Copyright (c) 1995-1997 Graham Barr <gbarr@pobox.com>. All rights reserved. | |
4 | # This program is free software; you can redistribute it and/or | |
5 | # modify it under the same terms as Perl itself. | |
6 | ||
7 | package Net::NNTP; | |
8 | ||
9 | use strict; | |
10 | use vars qw(@ISA $VERSION $debug); | |
11 | use IO::Socket; | |
12 | use Net::Cmd; | |
13 | use Carp; | |
14 | use Time::Local; | |
15 | use Net::Config; | |
16 | ||
17 | $VERSION = "2.21"; # $Id: //depot/libnet/Net/NNTP.pm#15 $ | |
18 | @ISA = qw(Net::Cmd IO::Socket::INET); | |
19 | ||
20 | sub new | |
21 | { | |
22 | my $self = shift; | |
23 | my $type = ref($self) || $self; | |
24 | my $host = shift if @_ % 2; | |
25 | my %arg = @_; | |
26 | my $obj; | |
27 | ||
28 | $host ||= $ENV{NNTPSERVER} || $ENV{NEWSHOST}; | |
29 | ||
30 | my $hosts = defined $host ? [ $host ] : $NetConfig{nntp_hosts}; | |
31 | ||
32 | @{$hosts} = qw(news) | |
33 | unless @{$hosts}; | |
34 | ||
35 | my $h; | |
36 | foreach $h (@{$hosts}) | |
37 | { | |
38 | $obj = $type->SUPER::new(PeerAddr => ($host = $h), | |
39 | PeerPort => $arg{Port} || 'nntp(119)', | |
40 | Proto => 'tcp', | |
41 | Timeout => defined $arg{Timeout} | |
42 | ? $arg{Timeout} | |
43 | : 120 | |
44 | ) and last; | |
45 | } | |
46 | ||
47 | return undef | |
48 | unless defined $obj; | |
49 | ||
50 | ${*$obj}{'net_nntp_host'} = $host; | |
51 | ||
52 | $obj->autoflush(1); | |
53 | $obj->debug(exists $arg{Debug} ? $arg{Debug} : undef); | |
54 | ||
55 | unless ($obj->response() == CMD_OK) | |
56 | { | |
57 | $obj->close; | |
58 | return undef; | |
59 | } | |
60 | ||
61 | my $c = $obj->code; | |
62 | my @m = $obj->message; | |
63 | ||
64 | unless(exists $arg{Reader} && $arg{Reader} == 0) { | |
65 | # if server is INN and we have transfer rights the we are currently | |
66 | # talking to innd not nnrpd | |
67 | if($obj->reader) | |
68 | { | |
69 | # If reader suceeds the we need to consider this code to determine postok | |
70 | $c = $obj->code; | |
71 | } | |
72 | else | |
73 | { | |
74 | # I want to ignore this failure, so restore the previous status. | |
75 | $obj->set_status($c,\@m); | |
76 | } | |
77 | } | |
78 | ||
79 | ${*$obj}{'net_nntp_post'} = $c == 200 ? 1 : 0; | |
80 | ||
81 | $obj; | |
82 | } | |
83 | ||
84 | sub debug_text | |
85 | { | |
86 | my $nntp = shift; | |
87 | my $inout = shift; | |
88 | my $text = shift; | |
89 | ||
90 | if(($nntp->code == 350 && $text =~ /^(\S+)/) | |
91 | || ($text =~ /^(authinfo\s+pass)/io)) | |
92 | { | |
93 | $text = "$1 ....\n" | |
94 | } | |
95 | ||
96 | $text; | |
97 | } | |
98 | ||
99 | sub postok | |
100 | { | |
101 | @_ == 1 or croak 'usage: $nntp->postok()'; | |
102 | my $nntp = shift; | |
103 | ${*$nntp}{'net_nntp_post'} || 0; | |
104 | } | |
105 | ||
106 | sub article | |
107 | { | |
108 | @_ >= 1 && @_ <= 3 or croak 'usage: $nntp->article( [ MSGID ], [ FH ] )'; | |
109 | my $nntp = shift; | |
110 | my @fh; | |
111 | ||
112 | @fh = (pop) if @_ == 2 || (@_ && ref($_[0]) || ref(\$_[0]) eq 'GLOB'); | |
113 | ||
114 | $nntp->_ARTICLE(@_) | |
115 | ? $nntp->read_until_dot(@fh) | |
116 | : undef; | |
117 | } | |
118 | ||
119 | sub articlefh { | |
120 | @_ >= 1 && @_ <= 2 or croak 'usage: $nntp->articlefh( [ MSGID ] )'; | |
121 | my $nntp = shift; | |
122 | ||
123 | return unless $nntp->_ARTICLE(@_); | |
124 | return $nntp->tied_fh; | |
125 | } | |
126 | ||
127 | sub authinfo | |
128 | { | |
129 | @_ == 3 or croak 'usage: $nntp->authinfo( USER, PASS )'; | |
130 | my($nntp,$user,$pass) = @_; | |
131 | ||
132 | $nntp->_AUTHINFO("USER",$user) == CMD_MORE | |
133 | && $nntp->_AUTHINFO("PASS",$pass) == CMD_OK; | |
134 | } | |
135 | ||
136 | sub authinfo_simple | |
137 | { | |
138 | @_ == 3 or croak 'usage: $nntp->authinfo( USER, PASS )'; | |
139 | my($nntp,$user,$pass) = @_; | |
140 | ||
141 | $nntp->_AUTHINFO('SIMPLE') == CMD_MORE | |
142 | && $nntp->command($user,$pass)->response == CMD_OK; | |
143 | } | |
144 | ||
145 | sub body | |
146 | { | |
147 | @_ >= 1 && @_ <= 3 or croak 'usage: $nntp->body( [ MSGID ], [ FH ] )'; | |
148 | my $nntp = shift; | |
149 | my @fh; | |
150 | ||
151 | @fh = (pop) if @_ == 2 || (@_ && ref($_[0]) || ref(\$_[0]) eq 'GLOB'); | |
152 | ||
153 | $nntp->_BODY(@_) | |
154 | ? $nntp->read_until_dot(@fh) | |
155 | : undef; | |
156 | } | |
157 | ||
158 | sub bodyfh | |
159 | { | |
160 | @_ >= 1 && @_ <= 2 or croak 'usage: $nntp->bodyfh( [ MSGID ] )'; | |
161 | my $nntp = shift; | |
162 | return unless $nntp->_BODY(@_); | |
163 | return $nntp->tied_fh; | |
164 | } | |
165 | ||
166 | sub head | |
167 | { | |
168 | @_ >= 1 && @_ <= 3 or croak 'usage: $nntp->head( [ MSGID ], [ FH ] )'; | |
169 | my $nntp = shift; | |
170 | my @fh; | |
171 | ||
172 | @fh = (pop) if @_ == 2 || (@_ && ref($_[0]) || ref(\$_[0]) eq 'GLOB'); | |
173 | ||
174 | $nntp->_HEAD(@_) | |
175 | ? $nntp->read_until_dot(@fh) | |
176 | : undef; | |
177 | } | |
178 | ||
179 | sub headfh | |
180 | { | |
181 | @_ >= 1 && @_ <= 2 or croak 'usage: $nntp->headfh( [ MSGID ] )'; | |
182 | my $nntp = shift; | |
183 | return unless $nntp->_HEAD(@_); | |
184 | return $nntp->tied_fh; | |
185 | } | |
186 | ||
187 | sub nntpstat | |
188 | { | |
189 | @_ == 1 || @_ == 2 or croak 'usage: $nntp->nntpstat( [ MSGID ] )'; | |
190 | my $nntp = shift; | |
191 | ||
192 | $nntp->_STAT(@_) && $nntp->message =~ /(<[^>]+>)/o | |
193 | ? $1 | |
194 | : undef; | |
195 | } | |
196 | ||
197 | ||
198 | sub group | |
199 | { | |
200 | @_ == 1 || @_ == 2 or croak 'usage: $nntp->group( [ GROUP ] )'; | |
201 | my $nntp = shift; | |
202 | my $grp = ${*$nntp}{'net_nntp_group'} || undef; | |
203 | ||
204 | return $grp | |
205 | unless(@_ || wantarray); | |
206 | ||
207 | my $newgrp = shift; | |
208 | ||
209 | return wantarray ? () : undef | |
210 | unless $nntp->_GROUP($newgrp || $grp || "") | |
211 | && $nntp->message =~ /(\d+)\s+(\d+)\s+(\d+)\s+(\S+)/; | |
212 | ||
213 | my($count,$first,$last,$group) = ($1,$2,$3,$4); | |
214 | ||
215 | # group may be replied as '(current group)' | |
216 | $group = ${*$nntp}{'net_nntp_group'} | |
217 | if $group =~ /\(/; | |
218 | ||
219 | ${*$nntp}{'net_nntp_group'} = $group; | |
220 | ||
221 | wantarray | |
222 | ? ($count,$first,$last,$group) | |
223 | : $group; | |
224 | } | |
225 | ||
226 | sub help | |
227 | { | |
228 | @_ == 1 or croak 'usage: $nntp->help()'; | |
229 | my $nntp = shift; | |
230 | ||
231 | $nntp->_HELP | |
232 | ? $nntp->read_until_dot | |
233 | : undef; | |
234 | } | |
235 | ||
236 | sub ihave | |
237 | { | |
238 | @_ >= 2 or croak 'usage: $nntp->ihave( MESSAGE-ID [, MESSAGE ])'; | |
239 | my $nntp = shift; | |
240 | my $mid = shift; | |
241 | ||
242 | $nntp->_IHAVE($mid) && $nntp->datasend(@_) | |
243 | ? @_ == 0 || $nntp->dataend | |
244 | : undef; | |
245 | } | |
246 | ||
247 | sub last | |
248 | { | |
249 | @_ == 1 or croak 'usage: $nntp->last()'; | |
250 | my $nntp = shift; | |
251 | ||
252 | $nntp->_LAST && $nntp->message =~ /(<[^>]+>)/o | |
253 | ? $1 | |
254 | : undef; | |
255 | } | |
256 | ||
257 | sub list | |
258 | { | |
259 | @_ == 1 or croak 'usage: $nntp->list()'; | |
260 | my $nntp = shift; | |
261 | ||
262 | $nntp->_LIST | |
263 | ? $nntp->_grouplist | |
264 | : undef; | |
265 | } | |
266 | ||
267 | sub newgroups | |
268 | { | |
269 | @_ >= 2 or croak 'usage: $nntp->newgroups( SINCE [, DISTRIBUTIONS ])'; | |
270 | my $nntp = shift; | |
271 | my $time = _timestr(shift); | |
272 | my $dist = shift || ""; | |
273 | ||
274 | $dist = join(",", @{$dist}) | |
275 | if ref($dist); | |
276 | ||
277 | $nntp->_NEWGROUPS($time,$dist) | |
278 | ? $nntp->_grouplist | |
279 | : undef; | |
280 | } | |
281 | ||
282 | sub newnews | |
283 | { | |
284 | @_ >= 2 && @_ <= 4 or | |
285 | croak 'usage: $nntp->newnews( SINCE [, GROUPS [, DISTRIBUTIONS ]])'; | |
286 | my $nntp = shift; | |
287 | my $time = _timestr(shift); | |
288 | my $grp = @_ ? shift : $nntp->group; | |
289 | my $dist = shift || ""; | |
290 | ||
291 | $grp ||= "*"; | |
292 | $grp = join(",", @{$grp}) | |
293 | if ref($grp); | |
294 | ||
295 | $dist = join(",", @{$dist}) | |
296 | if ref($dist); | |
297 | ||
298 | $nntp->_NEWNEWS($grp,$time,$dist) | |
299 | ? $nntp->_articlelist | |
300 | : undef; | |
301 | } | |
302 | ||
303 | sub next | |
304 | { | |
305 | @_ == 1 or croak 'usage: $nntp->next()'; | |
306 | my $nntp = shift; | |
307 | ||
308 | $nntp->_NEXT && $nntp->message =~ /(<[^>]+>)/o | |
309 | ? $1 | |
310 | : undef; | |
311 | } | |
312 | ||
313 | sub post | |
314 | { | |
315 | @_ >= 1 or croak 'usage: $nntp->post( [ MESSAGE ] )'; | |
316 | my $nntp = shift; | |
317 | ||
318 | $nntp->_POST() && $nntp->datasend(@_) | |
319 | ? @_ == 0 || $nntp->dataend | |
320 | : undef; | |
321 | } | |
322 | ||
323 | sub postfh { | |
324 | my $nntp = shift; | |
325 | return unless $nntp->_POST(); | |
326 | return $nntp->tied_fh; | |
327 | } | |
328 | ||
329 | sub quit | |
330 | { | |
331 | @_ == 1 or croak 'usage: $nntp->quit()'; | |
332 | my $nntp = shift; | |
333 | ||
334 | $nntp->_QUIT; | |
335 | $nntp->close; | |
336 | } | |
337 | ||
338 | sub slave | |
339 | { | |
340 | @_ == 1 or croak 'usage: $nntp->slave()'; | |
341 | my $nntp = shift; | |
342 | ||
343 | $nntp->_SLAVE; | |
344 | } | |
345 | ||
346 | ## | |
347 | ## The following methods are not implemented by all servers | |
348 | ## | |
349 | ||
350 | sub active | |
351 | { | |
352 | @_ == 1 || @_ == 2 or croak 'usage: $nntp->active( [ PATTERN ] )'; | |
353 | my $nntp = shift; | |
354 | ||
355 | $nntp->_LIST('ACTIVE',@_) | |
356 | ? $nntp->_grouplist | |
357 | : undef; | |
358 | } | |
359 | ||
360 | sub active_times | |
361 | { | |
362 | @_ == 1 or croak 'usage: $nntp->active_times()'; | |
363 | my $nntp = shift; | |
364 | ||
365 | $nntp->_LIST('ACTIVE.TIMES') | |
366 | ? $nntp->_grouplist | |
367 | : undef; | |
368 | } | |
369 | ||
370 | sub distributions | |
371 | { | |
372 | @_ == 1 or croak 'usage: $nntp->distributions()'; | |
373 | my $nntp = shift; | |
374 | ||
375 | $nntp->_LIST('DISTRIBUTIONS') | |
376 | ? $nntp->_description | |
377 | : undef; | |
378 | } | |
379 | ||
380 | sub distribution_patterns | |
381 | { | |
382 | @_ == 1 or croak 'usage: $nntp->distributions()'; | |
383 | my $nntp = shift; | |
384 | ||
385 | my $arr; | |
386 | local $_; | |
387 | ||
388 | $nntp->_LIST('DISTRIB.PATS') && ($arr = $nntp->read_until_dot) | |
389 | ? [grep { /^\d/ && (chomp, $_ = [ split /:/ ]) } @$arr] | |
390 | : undef; | |
391 | } | |
392 | ||
393 | sub newsgroups | |
394 | { | |
395 | @_ == 1 || @_ == 2 or croak 'usage: $nntp->newsgroups( [ PATTERN ] )'; | |
396 | my $nntp = shift; | |
397 | ||
398 | $nntp->_LIST('NEWSGROUPS',@_) | |
399 | ? $nntp->_description | |
400 | : undef; | |
401 | } | |
402 | ||
403 | sub overview_fmt | |
404 | { | |
405 | @_ == 1 or croak 'usage: $nntp->overview_fmt()'; | |
406 | my $nntp = shift; | |
407 | ||
408 | $nntp->_LIST('OVERVIEW.FMT') | |
409 | ? $nntp->_articlelist | |
410 | : undef; | |
411 | } | |
412 | ||
413 | sub subscriptions | |
414 | { | |
415 | @_ == 1 or croak 'usage: $nntp->subscriptions()'; | |
416 | my $nntp = shift; | |
417 | ||
418 | $nntp->_LIST('SUBSCRIPTIONS') | |
419 | ? $nntp->_articlelist | |
420 | : undef; | |
421 | } | |
422 | ||
423 | sub listgroup | |
424 | { | |
425 | @_ == 1 || @_ == 2 or croak 'usage: $nntp->listgroup( [ GROUP ] )'; | |
426 | my $nntp = shift; | |
427 | ||
428 | $nntp->_LISTGROUP(@_) | |
429 | ? $nntp->_articlelist | |
430 | : undef; | |
431 | } | |
432 | ||
433 | sub reader | |
434 | { | |
435 | @_ == 1 or croak 'usage: $nntp->reader()'; | |
436 | my $nntp = shift; | |
437 | ||
438 | $nntp->_MODE('READER'); | |
439 | } | |
440 | ||
441 | sub xgtitle | |
442 | { | |
443 | @_ == 1 || @_ == 2 or croak 'usage: $nntp->xgtitle( [ PATTERN ] )'; | |
444 | my $nntp = shift; | |
445 | ||
446 | $nntp->_XGTITLE(@_) | |
447 | ? $nntp->_description | |
448 | : undef; | |
449 | } | |
450 | ||
451 | sub xhdr | |
452 | { | |
453 | @_ >= 2 && @_ <= 4 or croak 'usage: $nntp->xhdr( HEADER, [ MESSAGE-SPEC ] )'; | |
454 | my $nntp = shift; | |
455 | my $hdr = shift; | |
456 | my $arg = _msg_arg(@_); | |
457 | ||
458 | $nntp->_XHDR($hdr, $arg) | |
459 | ? $nntp->_description | |
460 | : undef; | |
461 | } | |
462 | ||
463 | sub xover | |
464 | { | |
465 | @_ == 2 || @_ == 3 or croak 'usage: $nntp->xover( MESSAGE-SPEC )'; | |
466 | my $nntp = shift; | |
467 | my $arg = _msg_arg(@_); | |
468 | ||
469 | $nntp->_XOVER($arg) | |
470 | ? $nntp->_fieldlist | |
471 | : undef; | |
472 | } | |
473 | ||
474 | sub xpat | |
475 | { | |
476 | @_ == 4 || @_ == 5 or croak '$nntp->xpat( HEADER, PATTERN, MESSAGE-SPEC )'; | |
477 | my $nntp = shift; | |
478 | my $hdr = shift; | |
479 | my $pat = shift; | |
480 | my $arg = _msg_arg(@_); | |
481 | ||
482 | $pat = join(" ", @$pat) | |
483 | if ref($pat); | |
484 | ||
485 | $nntp->_XPAT($hdr,$arg,$pat) | |
486 | ? $nntp->_description | |
487 | : undef; | |
488 | } | |
489 | ||
490 | sub xpath | |
491 | { | |
492 | @_ == 2 or croak 'usage: $nntp->xpath( MESSAGE-ID )'; | |
493 | my($nntp,$mid) = @_; | |
494 | ||
495 | return undef | |
496 | unless $nntp->_XPATH($mid); | |
497 | ||
498 | my $m; ($m = $nntp->message) =~ s/^\d+\s+//o; | |
499 | my @p = split /\s+/, $m; | |
500 | ||
501 | wantarray ? @p : $p[0]; | |
502 | } | |
503 | ||
504 | sub xrover | |
505 | { | |
506 | @_ == 2 || @_ == 3 or croak 'usage: $nntp->xrover( MESSAGE-SPEC )'; | |
507 | my $nntp = shift; | |
508 | my $arg = _msg_arg(@_); | |
509 | ||
510 | $nntp->_XROVER($arg) | |
511 | ? $nntp->_description | |
512 | : undef; | |
513 | } | |
514 | ||
515 | sub date | |
516 | { | |
517 | @_ == 1 or croak 'usage: $nntp->date()'; | |
518 | my $nntp = shift; | |
519 | ||
520 | $nntp->_DATE && $nntp->message =~ /(\d{4})(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)/ | |
521 | ? timegm($6,$5,$4,$3,$2-1,$1 - 1900) | |
522 | : undef; | |
523 | } | |
524 | ||
525 | ||
526 | ## | |
527 | ## Private subroutines | |
528 | ## | |
529 | ||
530 | sub _msg_arg | |
531 | { | |
532 | my $spec = shift; | |
533 | my $arg = ""; | |
534 | ||
535 | if(@_) | |
536 | { | |
537 | carp "Depriciated passing of two message numbers, " | |
538 | . "pass a reference" | |
539 | if $^W; | |
540 | $spec = [ $spec, $_[0] ]; | |
541 | } | |
542 | ||
543 | if(defined $spec) | |
544 | { | |
545 | if(ref($spec)) | |
546 | { | |
547 | $arg = $spec->[0]; | |
548 | if(defined $spec->[1]) | |
549 | { | |
550 | $arg .= "-" | |
551 | if $spec->[1] != $spec->[0]; | |
552 | $arg .= $spec->[1] | |
553 | if $spec->[1] > $spec->[0]; | |
554 | } | |
555 | } | |
556 | else | |
557 | { | |
558 | $arg = $spec; | |
559 | } | |
560 | } | |
561 | ||
562 | $arg; | |
563 | } | |
564 | ||
565 | sub _timestr | |
566 | { | |
567 | my $time = shift; | |
568 | my @g = reverse((gmtime($time))[0..5]); | |
569 | $g[1] += 1; | |
570 | $g[0] %= 100; | |
571 | sprintf "%02d%02d%02d %02d%02d%02d GMT", @g; | |
572 | } | |
573 | ||
574 | sub _grouplist | |
575 | { | |
576 | my $nntp = shift; | |
577 | my $arr = $nntp->read_until_dot or | |
578 | return undef; | |
579 | ||
580 | my $hash = {}; | |
581 | my $ln; | |
582 | ||
583 | foreach $ln (@$arr) | |
584 | { | |
585 | my @a = split(/[\s\n]+/,$ln); | |
586 | $hash->{$a[0]} = [ @a[1,2,3] ]; | |
587 | } | |
588 | ||
589 | $hash; | |
590 | } | |
591 | ||
592 | sub _fieldlist | |
593 | { | |
594 | my $nntp = shift; | |
595 | my $arr = $nntp->read_until_dot or | |
596 | return undef; | |
597 | ||
598 | my $hash = {}; | |
599 | my $ln; | |
600 | ||
601 | foreach $ln (@$arr) | |
602 | { | |
603 | my @a = split(/[\t\n]/,$ln); | |
604 | my $m = shift @a; | |
605 | $hash->{$m} = [ @a ]; | |
606 | } | |
607 | ||
608 | $hash; | |
609 | } | |
610 | ||
611 | sub _articlelist | |
612 | { | |
613 | my $nntp = shift; | |
614 | my $arr = $nntp->read_until_dot; | |
615 | ||
616 | chomp(@$arr) | |
617 | if $arr; | |
618 | ||
619 | $arr; | |
620 | } | |
621 | ||
622 | sub _description | |
623 | { | |
624 | my $nntp = shift; | |
625 | my $arr = $nntp->read_until_dot or | |
626 | return undef; | |
627 | ||
628 | my $hash = {}; | |
629 | my $ln; | |
630 | ||
631 | foreach $ln (@$arr) | |
632 | { | |
633 | chomp($ln); | |
634 | ||
635 | $hash->{$1} = $ln | |
636 | if $ln =~ s/^\s*(\S+)\s*//o; | |
637 | } | |
638 | ||
639 | $hash; | |
640 | ||
641 | } | |
642 | ||
643 | ## | |
644 | ## The commands | |
645 | ## | |
646 | ||
647 | sub _ARTICLE { shift->command('ARTICLE',@_)->response == CMD_OK } | |
648 | sub _AUTHINFO { shift->command('AUTHINFO',@_)->response } | |
649 | sub _BODY { shift->command('BODY',@_)->response == CMD_OK } | |
650 | sub _DATE { shift->command('DATE')->response == CMD_INFO } | |
651 | sub _GROUP { shift->command('GROUP',@_)->response == CMD_OK } | |
652 | sub _HEAD { shift->command('HEAD',@_)->response == CMD_OK } | |
653 | sub _HELP { shift->command('HELP',@_)->response == CMD_INFO } | |
654 | sub _IHAVE { shift->command('IHAVE',@_)->response == CMD_MORE } | |
655 | sub _LAST { shift->command('LAST')->response == CMD_OK } | |
656 | sub _LIST { shift->command('LIST',@_)->response == CMD_OK } | |
657 | sub _LISTGROUP { shift->command('LISTGROUP',@_)->response == CMD_OK } | |
658 | sub _NEWGROUPS { shift->command('NEWGROUPS',@_)->response == CMD_OK } | |
659 | sub _NEWNEWS { shift->command('NEWNEWS',@_)->response == CMD_OK } | |
660 | sub _NEXT { shift->command('NEXT')->response == CMD_OK } | |
661 | sub _POST { shift->command('POST',@_)->response == CMD_MORE } | |
662 | sub _QUIT { shift->command('QUIT',@_)->response == CMD_OK } | |
663 | sub _SLAVE { shift->command('SLAVE',@_)->response == CMD_OK } | |
664 | sub _STAT { shift->command('STAT',@_)->response == CMD_OK } | |
665 | sub _MODE { shift->command('MODE',@_)->response == CMD_OK } | |
666 | sub _XGTITLE { shift->command('XGTITLE',@_)->response == CMD_OK } | |
667 | sub _XHDR { shift->command('XHDR',@_)->response == CMD_OK } | |
668 | sub _XPAT { shift->command('XPAT',@_)->response == CMD_OK } | |
669 | sub _XPATH { shift->command('XPATH',@_)->response == CMD_OK } | |
670 | sub _XOVER { shift->command('XOVER',@_)->response == CMD_OK } | |
671 | sub _XROVER { shift->command('XROVER',@_)->response == CMD_OK } | |
672 | sub _XTHREAD { shift->unsupported } | |
673 | sub _XSEARCH { shift->unsupported } | |
674 | sub _XINDEX { shift->unsupported } | |
675 | ||
676 | ## | |
677 | ## IO/perl methods | |
678 | ## | |
679 | ||
680 | sub DESTROY | |
681 | { | |
682 | my $nntp = shift; | |
683 | defined(fileno($nntp)) && $nntp->quit | |
684 | } | |
685 | ||
686 | ||
687 | 1; | |
688 | ||
689 | __END__ | |
690 | ||
691 | =head1 NAME | |
692 | ||
693 | Net::NNTP - NNTP Client class | |
694 | ||
695 | =head1 SYNOPSIS | |
696 | ||
697 | use Net::NNTP; | |
698 | ||
699 | $nntp = Net::NNTP->new("some.host.name"); | |
700 | $nntp->quit; | |
701 | ||
702 | =head1 DESCRIPTION | |
703 | ||
704 | C<Net::NNTP> is a class implementing a simple NNTP client in Perl as described | |
705 | in RFC977. C<Net::NNTP> inherits its communication methods from C<Net::Cmd> | |
706 | ||
707 | =head1 CONSTRUCTOR | |
708 | ||
709 | =over 4 | |
710 | ||
711 | =item new ( [ HOST ] [, OPTIONS ]) | |
712 | ||
713 | This is the constructor for a new Net::NNTP object. C<HOST> is the | |
714 | name of the remote host to which a NNTP connection is required. If not | |
715 | given two environment variables are checked, first C<NNTPSERVER> then | |
716 | C<NEWSHOST>, then C<Net::Config> is checked, and if a host is not found | |
717 | then C<news> is used. | |
718 | ||
719 | C<OPTIONS> are passed in a hash like fashion, using key and value pairs. | |
720 | Possible options are: | |
721 | ||
722 | B<Timeout> - Maximum time, in seconds, to wait for a response from the | |
723 | NNTP server, a value of zero will cause all IO operations to block. | |
724 | (default: 120) | |
725 | ||
726 | B<Debug> - Enable the printing of debugging information to STDERR | |
727 | ||
728 | B<Reader> - If the remote server is INN then initially the connection | |
729 | will be to nnrpd, by default C<Net::NNTP> will issue a C<MODE READER> command | |
730 | so that the remote server becomes innd. If the C<Reader> option is given | |
731 | with a value of zero, then this command will not be sent and the | |
732 | connection will be left talking to nnrpd. | |
733 | ||
734 | =back | |
735 | ||
736 | =head1 METHODS | |
737 | ||
738 | Unless otherwise stated all methods return either a I<true> or I<false> | |
739 | value, with I<true> meaning that the operation was a success. When a method | |
740 | states that it returns a value, failure will be returned as I<undef> or an | |
741 | empty list. | |
742 | ||
743 | =over 4 | |
744 | ||
745 | =item article ( [ MSGID|MSGNUM ], [FH] ) | |
746 | ||
747 | Retrieve the header, a blank line, then the body (text) of the | |
748 | specified article. | |
749 | ||
750 | If C<FH> is specified then it is expected to be a valid filehandle | |
751 | and the result will be printed to it, on sucess a true value will be | |
752 | returned. If C<FH> is not specified then the return value, on sucess, | |
753 | will be a reference to an array containg the article requested, each | |
754 | entry in the array will contain one line of the article. | |
755 | ||
756 | If no arguments are passed then the current article in the currently | |
757 | selected newsgroup is fetched. | |
758 | ||
759 | C<MSGNUM> is a numeric id of an article in the current newsgroup, and | |
760 | will change the current article pointer. C<MSGID> is the message id of | |
761 | an article as shown in that article's header. It is anticipated that the | |
762 | client will obtain the C<MSGID> from a list provided by the C<newnews> | |
763 | command, from references contained within another article, or from the | |
764 | message-id provided in the response to some other commands. | |
765 | ||
766 | If there is an error then C<undef> will be returned. | |
767 | ||
768 | =item body ( [ MSGID|MSGNUM ], [FH] ) | |
769 | ||
770 | Like C<article> but only fetches the body of the article. | |
771 | ||
772 | =item head ( [ MSGID|MSGNUM ], [FH] ) | |
773 | ||
774 | Like C<article> but only fetches the headers for the article. | |
775 | ||
776 | =item articlefh ( [ MSGID|MSGNUM ] ) | |
777 | ||
778 | =item bodyfh ( [ MSGID|MSGNUM ] ) | |
779 | ||
780 | =item headfh ( [ MSGID|MSGNUM ] ) | |
781 | ||
782 | These are similar to article(), body() and head(), but rather than | |
783 | returning the requested data directly, they return a tied filehandle | |
784 | from which to read the article. | |
785 | ||
786 | =item nntpstat ( [ MSGID|MSGNUM ] ) | |
787 | ||
788 | The C<nntpstat> command is similar to the C<article> command except that no | |
789 | text is returned. When selecting by message number within a group, | |
790 | the C<nntpstat> command serves to set the "current article pointer" without | |
791 | sending text. | |
792 | ||
793 | Using the C<nntpstat> command to | |
794 | select by message-id is valid but of questionable value, since a | |
795 | selection by message-id does B<not> alter the "current article pointer". | |
796 | ||
797 | Returns the message-id of the "current article". | |
798 | ||
799 | =item group ( [ GROUP ] ) | |
800 | ||
801 | Set and/or get the current group. If C<GROUP> is not given then information | |
802 | is returned on the current group. | |
803 | ||
804 | In a scalar context it returns the group name. | |
805 | ||
806 | In an array context the return value is a list containing, the number | |
807 | of articles in the group, the number of the first article, the number | |
808 | of the last article and the group name. | |
809 | ||
810 | =item ihave ( MSGID [, MESSAGE ]) | |
811 | ||
812 | The C<ihave> command informs the server that the client has an article | |
813 | whose id is C<MSGID>. If the server desires a copy of that | |
814 | article, and C<MESSAGE> has been given the it will be sent. | |
815 | ||
816 | Returns I<true> if the server desires the article and C<MESSAGE> was | |
817 | successfully sent,if specified. | |
818 | ||
819 | If C<MESSAGE> is not specified then the message must be sent using the | |
820 | C<datasend> and C<dataend> methods from L<Net::Cmd> | |
821 | ||
822 | C<MESSAGE> can be either an array of lines or a reference to an array. | |
823 | ||
824 | =item last () | |
825 | ||
826 | Set the "current article pointer" to the previous article in the current | |
827 | newsgroup. | |
828 | ||
829 | Returns the message-id of the article. | |
830 | ||
831 | =item date () | |
832 | ||
833 | Returns the date on the remote server. This date will be in a UNIX time | |
834 | format (seconds since 1970) | |
835 | ||
836 | =item postok () | |
837 | ||
838 | C<postok> will return I<true> if the servers initial response indicated | |
839 | that it will allow posting. | |
840 | ||
841 | =item authinfo ( USER, PASS ) | |
842 | ||
843 | =item list () | |
844 | ||
845 | Obtain information about all the active newsgroups. The results is a reference | |
846 | to a hash where the key is a group name and each value is a reference to an | |
847 | array. The elements in this array are:- the last article number in the group, | |
848 | the first article number in the group and any information flags about the group. | |
849 | ||
850 | =item newgroups ( SINCE [, DISTRIBUTIONS ]) | |
851 | ||
852 | C<SINCE> is a time value and C<DISTRIBUTIONS> is either a distribution | |
853 | pattern or a reference to a list of distribution patterns. | |
854 | The result is the same as C<list>, but the | |
855 | groups return will be limited to those created after C<SINCE> and, if | |
856 | specified, in one of the distribution areas in C<DISTRIBUTIONS>. | |
857 | ||
858 | =item newnews ( SINCE [, GROUPS [, DISTRIBUTIONS ]]) | |
859 | ||
860 | C<SINCE> is a time value. C<GROUPS> is either a group pattern or a reference | |
861 | to a list of group patterns. C<DISTRIBUTIONS> is either a distribution | |
862 | pattern or a reference to a list of distribution patterns. | |
863 | ||
864 | Returns a reference to a list which contains the message-ids of all news posted | |
865 | after C<SINCE>, that are in a groups which matched C<GROUPS> and a | |
866 | distribution which matches C<DISTRIBUTIONS>. | |
867 | ||
868 | =item next () | |
869 | ||
870 | Set the "current article pointer" to the next article in the current | |
871 | newsgroup. | |
872 | ||
873 | Returns the message-id of the article. | |
874 | ||
875 | =item post ( [ MESSAGE ] ) | |
876 | ||
877 | Post a new article to the news server. If C<MESSAGE> is specified and posting | |
878 | is allowed then the message will be sent. | |
879 | ||
880 | If C<MESSAGE> is not specified then the message must be sent using the | |
881 | C<datasend> and C<dataend> methods from L<Net::Cmd> | |
882 | ||
883 | C<MESSAGE> can be either an array of lines or a reference to an array. | |
884 | ||
885 | =item postfh () | |
886 | ||
887 | Post a new article to the news server using a tied filehandle. If | |
888 | posting is allowed, this method will return a tied filehandle that you | |
889 | can print() the contents of the article to be posted. You must | |
890 | explicitly close() the filehandle when you are finished posting the | |
891 | article, and the return value from the close() call will indicate | |
892 | whether the message was successfully posted. | |
893 | ||
894 | =item slave () | |
895 | ||
896 | Tell the remote server that I am not a user client, but probably another | |
897 | news server. | |
898 | ||
899 | =item quit () | |
900 | ||
901 | Quit the remote server and close the socket connection. | |
902 | ||
903 | =back | |
904 | ||
905 | =head2 Extension methods | |
906 | ||
907 | These methods use commands that are not part of the RFC977 documentation. Some | |
908 | servers may not support all of them. | |
909 | ||
910 | =over 4 | |
911 | ||
912 | =item newsgroups ( [ PATTERN ] ) | |
913 | ||
914 | Returns a reference to a hash where the keys are all the group names which | |
915 | match C<PATTERN>, or all of the groups if no pattern is specified, and | |
916 | each value contains the description text for the group. | |
917 | ||
918 | =item distributions () | |
919 | ||
920 | Returns a reference to a hash where the keys are all the possible | |
921 | distribution names and the values are the distribution descriptions. | |
922 | ||
923 | =item subscriptions () | |
924 | ||
925 | Returns a reference to a list which contains a list of groups which | |
926 | are recommended for a new user to subscribe to. | |
927 | ||
928 | =item overview_fmt () | |
929 | ||
930 | Returns a reference to an array which contain the names of the fields returned | |
931 | by C<xover>. | |
932 | ||
933 | =item active_times () | |
934 | ||
935 | Returns a reference to a hash where the keys are the group names and each | |
936 | value is a reference to an array containing the time the groups was created | |
937 | and an identifier, possibly an Email address, of the creator. | |
938 | ||
939 | =item active ( [ PATTERN ] ) | |
940 | ||
941 | Similar to C<list> but only active groups that match the pattern are returned. | |
942 | C<PATTERN> can be a group pattern. | |
943 | ||
944 | =item xgtitle ( PATTERN ) | |
945 | ||
946 | Returns a reference to a hash where the keys are all the group names which | |
947 | match C<PATTERN> and each value is the description text for the group. | |
948 | ||
949 | =item xhdr ( HEADER, MESSAGE-SPEC ) | |
950 | ||
951 | Obtain the header field C<HEADER> for all the messages specified. | |
952 | ||
953 | The return value will be a reference | |
954 | to a hash where the keys are the message numbers and each value contains | |
955 | the text of the requested header for that message. | |
956 | ||
957 | =item xover ( MESSAGE-SPEC ) | |
958 | ||
959 | The return value will be a reference | |
960 | to a hash where the keys are the message numbers and each value contains | |
961 | a reference to an array which contains the overview fields for that | |
962 | message. | |
963 | ||
964 | The names of the fields can be obtained by calling C<overview_fmt>. | |
965 | ||
966 | =item xpath ( MESSAGE-ID ) | |
967 | ||
968 | Returns the path name to the file on the server which contains the specified | |
969 | message. | |
970 | ||
971 | =item xpat ( HEADER, PATTERN, MESSAGE-SPEC) | |
972 | ||
973 | The result is the same as C<xhdr> except the is will be restricted to | |
974 | headers where the text of the header matches C<PATTERN> | |
975 | ||
976 | =item xrover | |
977 | ||
978 | The XROVER command returns reference information for the article(s) | |
979 | specified. | |
980 | ||
981 | Returns a reference to a HASH where the keys are the message numbers and the | |
982 | values are the References: lines from the articles | |
983 | ||
984 | =item listgroup ( [ GROUP ] ) | |
985 | ||
986 | Returns a reference to a list of all the active messages in C<GROUP>, or | |
987 | the current group if C<GROUP> is not specified. | |
988 | ||
989 | =item reader | |
990 | ||
991 | Tell the server that you are a reader and not another server. | |
992 | ||
993 | This is required by some servers. For example if you are connecting to | |
994 | an INN server and you have transfer permission your connection will | |
995 | be connected to the transfer daemon, not the NNTP daemon. Issuing | |
996 | this command will cause the transfer daemon to hand over control | |
997 | to the NNTP daemon. | |
998 | ||
999 | Some servers do not understand this command, but issuing it and ignoring | |
1000 | the response is harmless. | |
1001 | ||
1002 | =back | |
1003 | ||
1004 | =head1 UNSUPPORTED | |
1005 | ||
1006 | The following NNTP command are unsupported by the package, and there are | |
1007 | no plans to do so. | |
1008 | ||
1009 | AUTHINFO GENERIC | |
1010 | XTHREAD | |
1011 | XSEARCH | |
1012 | XINDEX | |
1013 | ||
1014 | =head1 DEFINITIONS | |
1015 | ||
1016 | =over 4 | |
1017 | ||
1018 | =item MESSAGE-SPEC | |
1019 | ||
1020 | C<MESSAGE-SPEC> is either a single message-id, a single message number, or | |
1021 | a reference to a list of two message numbers. | |
1022 | ||
1023 | If C<MESSAGE-SPEC> is a reference to a list of two message numbers and the | |
1024 | second number in a range is less than or equal to the first then the range | |
1025 | represents all messages in the group after the first message number. | |
1026 | ||
1027 | B<NOTE> For compatibility reasons only with earlier versions of Net::NNTP | |
1028 | a message spec can be passed as a list of two numbers, this is deprecated | |
1029 | and a reference to the list should now be passed | |
1030 | ||
1031 | =item PATTERN | |
1032 | ||
1033 | The C<NNTP> protocol uses the C<WILDMAT> format for patterns. | |
1034 | The WILDMAT format was first developed by Rich Salz based on | |
1035 | the format used in the UNIX "find" command to articulate | |
1036 | file names. It was developed to provide a uniform mechanism | |
1037 | for matching patterns in the same manner that the UNIX shell | |
1038 | matches filenames. | |
1039 | ||
1040 | Patterns are implicitly anchored at the | |
1041 | beginning and end of each string when testing for a match. | |
1042 | ||
1043 | There are five pattern matching operations other than a strict | |
1044 | one-to-one match between the pattern and the source to be | |
1045 | checked for a match. | |
1046 | ||
1047 | The first is an asterisk C<*> to match any sequence of zero or more | |
1048 | characters. | |
1049 | ||
1050 | The second is a question mark C<?> to match any single character. The | |
1051 | third specifies a specific set of characters. | |
1052 | ||
1053 | The set is specified as a list of characters, or as a range of characters | |
1054 | where the beginning and end of the range are separated by a minus (or dash) | |
1055 | character, or as any combination of lists and ranges. The dash can | |
1056 | also be included in the set as a character it if is the beginning | |
1057 | or end of the set. This set is enclosed in square brackets. The | |
1058 | close square bracket C<]> may be used in a set if it is the first | |
1059 | character in the set. | |
1060 | ||
1061 | The fourth operation is the same as the | |
1062 | logical not of the third operation and is specified the same | |
1063 | way as the third with the addition of a caret character C<^> at | |
1064 | the beginning of the test string just inside the open square | |
1065 | bracket. | |
1066 | ||
1067 | The final operation uses the backslash character to | |
1068 | invalidate the special meaning of an open square bracket C<[>, | |
1069 | the asterisk, backslash or the question mark. Two backslashes in | |
1070 | sequence will result in the evaluation of the backslash as a | |
1071 | character with no special meaning. | |
1072 | ||
1073 | =over 4 | |
1074 | ||
1075 | =item Examples | |
1076 | ||
1077 | =item C<[^]-]> | |
1078 | ||
1079 | matches any single character other than a close square | |
1080 | bracket or a minus sign/dash. | |
1081 | ||
1082 | =item C<*bdc> | |
1083 | ||
1084 | matches any string that ends with the string "bdc" | |
1085 | including the string "bdc" (without quotes). | |
1086 | ||
1087 | =item C<[0-9a-zA-Z]> | |
1088 | ||
1089 | matches any single printable alphanumeric ASCII character. | |
1090 | ||
1091 | =item C<a??d> | |
1092 | ||
1093 | matches any four character string which begins | |
1094 | with a and ends with d. | |
1095 | ||
1096 | =back | |
1097 | ||
1098 | =back | |
1099 | ||
1100 | =head1 SEE ALSO | |
1101 | ||
1102 | L<Net::Cmd> | |
1103 | ||
1104 | =head1 AUTHOR | |
1105 | ||
1106 | Graham Barr <gbarr@pobox.com> | |
1107 | ||
1108 | =head1 COPYRIGHT | |
1109 | ||
1110 | Copyright (c) 1995-1997 Graham Barr. All rights reserved. | |
1111 | This program is free software; you can redistribute it and/or modify | |
1112 | it under the same terms as Perl itself. | |
1113 | ||
1114 | =for html <hr> | |
1115 | ||
1116 | I<$Id: //depot/libnet/Net/NNTP.pm#15 $> | |
1117 | ||
1118 | =cut |