1 # Copyright (C) 2015 all contributors <meta@public-inbox.org>
2 # License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
4 # Each instance of this represents a NNTP client socket
5 package PublicInbox::NNTP;
8 use base qw(Danga::Socket);
9 use fields qw(nntpd article rbuf ng long_res);
10 use PublicInbox::Search;
11 use PublicInbox::Msgmap;
13 use PublicInbox::MID qw(mid2path);
15 use Data::Dumper qw(Dumper);
16 use POSIX qw(strftime);
17 use Time::HiRes qw(clock_gettime CLOCK_MONOTONIC);
19 r501 => '501 command syntax error',
20 r221 => '221 Header follows',
21 r224 => '224 Overview information follows (multi-line)',
22 r225 => '225 Headers follow (multi-line)',
23 r430 => '430 No article with that message-id',
24 long_response_limit => 0xffffffff,
27 sub now () { clock_gettime(CLOCK_MONOTONIC) };
29 my @OVERVIEW = qw(Subject From Date Message-ID References);
30 my $OVERVIEW_FMT = join(":\r\n", @OVERVIEW, qw(Bytes Lines)) . ":\r\n";
31 my $LIST_HEADERS = join("\r\n", @OVERVIEW,
32 qw(:bytes :lines Xref To Cc)) . "\r\n";
34 # disable commands with easy DoS potential:
35 # LISTGROUP could get pretty bad, too...
36 my %DISABLED; # = map { $_ => 1 } qw(xover list_overview_fmt newnews xhdr);
38 my $EXPMAP; # fd -> [ idle_time, $self ]
40 our $EXPTIME = 180; # 3 minutes
42 sub update_idle_time ($) {
44 my $tmp = $self->{sock} or return;
46 defined $tmp and $EXPMAP->{$tmp} = [ now(), $self ];
52 my $old = $now - $exp;
53 my $next = $now + $exp;
56 while (my ($fd, $v) = each %$EXPMAP) {
57 my ($idle_time, $nntp) = @$v;
58 if ($idle_time < $old) {
59 $nntp->close; # idempotent
61 my $nexp = $idle_time + $exp;
62 $next = $nexp if ($nexp < $next);
70 $next = 0 if $next < 0;
71 $EXPTIMER = Danga::Socket->AddTimer($next, *expire_old);
74 # noop to kick outselves out of the loop so descriptors
76 Danga::Socket->AddTimer(0, sub {});
81 my ($class, $sock, $nntpd) = @_;
82 my $self = fields::new($class);
83 binmode $sock, ':utf8'; # RFC 3977
84 $self->SUPER::new($sock);
85 $self->{nntpd} = $nntpd;
86 res($self, '201 server ready - post via email');
89 update_idle_time($self);
90 $EXPTIMER ||= Danga::Socket->AddTimer($EXPTIME, *expire_old);
96 my $tot = prototype $cb;
97 my ($nreq, undef) = split(';', $tot);
98 $nreq = ($nreq =~ tr/$//) - 1;
99 $tot = ($tot =~ tr/$//) - 1;
100 ($argc <= $tot && $argc >= $nreq);
103 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
104 sub process_line ($$) {
106 my ($req, @args) = split(/\s+/, $l);
110 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
112 return res($self, '500 command not recognized') unless $req;
113 return res($self, r501) unless args_ok($req, scalar @args);
115 my $res = eval { $req->($self, @args) };
117 if ($err && !$self->{closed}) {
118 chomp($l = Dumper(\$l));
119 err($self, 'error from: %s (%s)', $l, $err);
120 $res = '503 program fault - command not performed';
122 return 0 unless defined $res;
127 my ($self, $arg) = @_;
129 return r501 unless $arg eq 'READER';
130 '201 Posting prohibited';
133 sub cmd_slave ($) { '202 slave status noted' }
135 sub cmd_xgtitle ($;$) {
136 my ($self, $wildmat) = @_;
137 more($self, '282 list of groups and descriptions follows');
138 list_newsgroups($self, $wildmat);
142 sub list_overview_fmt ($) {
144 do_more($self, $OVERVIEW_FMT);
147 sub list_headers ($;$) {
149 do_more($self, $LIST_HEADERS);
152 sub list_active ($;$) {
153 my ($self, $wildmat) = @_;
154 wildmat2re($wildmat);
155 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
156 $ng->{name} =~ $wildmat or next;
157 group_line($self, $ng);
161 sub list_active_times ($;$) {
162 my ($self, $wildmat) = @_;
163 wildmat2re($wildmat);
164 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
165 $ng->{name} =~ $wildmat or next;
166 my $c = eval { $ng->mm->created_at } || time;
167 more($self, "$ng->{name} $c $ng->{address}");
171 sub list_newsgroups ($;$) {
172 my ($self, $wildmat) = @_;
173 wildmat2re($wildmat);
174 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
175 $ng->{name} =~ $wildmat or next;
176 my $d = $ng->description;
177 more($self, "$ng->{name} $d");
181 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
182 sub cmd_list ($;$$) {
183 my ($self, @args) = @_;
185 my $arg = shift @args;
186 $arg =~ tr/A-Z./a-z_/;
188 return r501 if $DISABLED{$arg};
194 return r501 unless $arg && args_ok($arg, scalar @args);
195 more($self, '215 information follows');
196 $arg->($self, @args);
198 more($self, '215 list of newsgroups follows');
199 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
200 group_line($self, $ng);
206 sub cmd_listgroup ($;$) {
207 my ($self, $group) = @_;
208 if (defined $group) {
209 my $res = cmd_group($self, $group);
210 return $res if ($res !~ /\A211 /);
214 $self->{ng} or return '412 no newsgroup selected';
215 $self->long_response(0, long_response_limit, sub {
217 my $nr = $self->{ng}->mm->id_batch($$i, sub {
219 more($self, join("\r\n", @$ary));
222 # -1 to adjust for implicit increment in long_response
223 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
227 sub parse_time ($$;$) {
228 my ($date, $time, $gmt) = @_;
229 use Time::Local qw();
230 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
232 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt\n";
235 my @now = $gmt ? gmtime : localtime;
236 my ($YYYY, $MM, $DD);
237 if (length($date) == 8) { # RFC 3977 allows YYYYMMDD
238 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
239 } else { # legacy clients send YYMMDD
240 ($YYYY, $MM, $DD) = unpack('A2A2A2', $date);
241 if ($YYYY > strftime('%y', @now)) {
242 my $cur_year = $now[5] + 1900;
243 $YYYY += int($cur_year / 1000) * 1000 - 100;
247 Time::Local::timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
249 Time::Local::timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
253 sub group_line ($$) {
254 my ($self, $ng) = @_;
255 my ($min, $max) = $ng->mm->minmax;
256 more($self, "$ng->{name} $max $min n") if defined $min && defined $max;
259 sub cmd_newgroups ($$$;$$) {
260 my ($self, $date, $time, $gmt, $dists) = @_;
261 my $ts = eval { parse_time($date, $time, $gmt) };
265 more($self, '231 list of new newsgroups follows');
266 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
267 my $c = eval { $ng->mm->created_at } || 0;
268 next unless $c > $ts;
269 group_line($self, $ng);
274 sub wildmat2re (;$) {
275 return $_[0] = qr/.*/ if (!defined $_[0] || $_[0] eq '*');
278 use Digest::SHA qw(sha1_hex);
281 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
283 my $key = sha1_hex($orig . $salt);
284 $orig =~ s/([^\w\-])+/\Q$1/g;
288 my %map = ('*' => '.*', '?' => '.' );
289 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
291 $tmp =~ s#([a-f0-9]{40})#
292 my $orig = $keep{$1};
293 defined $orig ? $orig : $1;
296 $_[0] = qr/\A$tmp\z/;
300 return $_[0] = qr/\A\z/ unless defined $_[0];
301 my %map = ('*' => '.*', ',' => '|');
302 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
303 $_[0] = qr/\A(?:$_[0])\z/;
306 sub cmd_newnews ($$$$;$$) {
307 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
308 my $ts = eval { parse_time($date, $time, $gmt) };
310 more($self, '230 list of new articles by message-id follows');
311 my ($keep, $skip) = split('!', $newsgroups, 2);
315 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
316 $ng->{name} =~ $keep or next;
317 $ng->{name} =~ $skip and next;
318 my $srch = $ng->search or next;
321 return '.' unless @srch;
324 my $opts = { asc => 1, limit => 1000, offset => 0 };
325 $self->long_response(0, long_response_limit, sub {
328 my $res = $srch->query($ts, $opts);
329 my $msgs = $res->{msgs};
330 if (my $nr = scalar @$msgs) {
332 join(">\r\n<", map { $_->mid } @$msgs ).
334 $opts->{offset} += $nr;
337 if (@srch) { # continue onto next newsgroup
339 } else { # break out of the long response.
340 $$i = long_response_limit;
347 my ($self, $group) = @_;
348 my $no_such = '411 no such news group';
349 my $ng = $self->{nntpd}->{groups}->{$group} or return $no_such;
352 my ($min, $max) = $ng->mm->minmax;
355 $self->{article} = $min;
356 my $est_size = $max - $min;
357 "211 $est_size $min $max $group";
360 sub article_adj ($$) {
361 my ($self, $off) = @_;
362 my $ng = $self->{ng} or return '412 no newsgroup selected';
364 my $n = $self->{article};
365 defined $n or return '420 no current article has been selected';
368 my $mid = $ng->mm->mid_for($n);
370 $n = $off > 0 ? 'next' : 'previous';
371 return "421 no $n article in this group";
373 $self->{article} = $n;
374 "223 $n <$mid> article retrieved - request text separately";
377 sub cmd_next ($) { article_adj($_[0], 1) }
378 sub cmd_last ($) { article_adj($_[0], -1) }
380 # We want to encourage using email and CC-ing everybody involved to avoid
381 # the single-point-of-failure a single server provides.
384 my $ng = $self->{ng};
385 $ng ? "440 mailto:$ng->{address} to post" : '440 posting not allowed'
390 res($self, '205 closing connection - goodbye!');
395 sub art_lookup ($$$) {
396 my ($self, $art, $set_headers) = @_;
397 my $ng = $self->{ng};
401 if ($art =~ /\A\d+\z/o) {
402 $err = '423 no such article number in this group';
405 } elsif ($art =~ /\A<([^>]+)>\z/) {
408 $n = $ng->mm->num_for($mid) if $ng;
409 goto found if defined $n;
410 foreach my $g (values %{$self->{nntpd}->{groups}}) {
411 $n = $g->mm->num_for($mid);
422 $err = '420 no current article has been selected';
423 $n = $self->{article};
424 defined $n or return $err;
426 $ng or return '412 no newsgroup has been selected';
427 $mid = $ng->mm->mid_for($n);
428 defined $mid or return $err;
431 my $o = 'HEAD:' . mid2path($mid);
433 my $s = eval { Email::MIME->new($ng->gcf->cat_file($o, \$bytes)) };
434 return $err unless $s;
437 $s->header_set('Newsgroups', $ng->{name});
438 $s->header_set('Xref', xref($ng, $n));
439 $lines = $s->body =~ tr!\n!\n!;
442 $s->body_set('') if ($set_headers == 2);
444 [ $n, $mid, $s, $bytes, $lines, $ng ];
447 sub simple_body_write ($$) {
451 $body =~ s/^\./../smg;
452 $body =~ s/(?<!\r)\n/\r\n/sg;
453 do_more($self, $body);
454 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
459 my ($self, $art) = @_;
460 $self->{article} = $art if defined $art && $art =~ /\A\d+\z/;
463 sub cmd_article ($;$) {
464 my ($self, $art) = @_;
465 my $r = $self->art_lookup($art, 1);
466 return $r unless ref $r;
467 my ($n, $mid, $s) = @$r;
468 set_art($self, $art);
469 more($self, "220 $n <$mid> article retrieved - head and body follow");
470 do_more($self, $s->header_obj->as_string);
471 do_more($self, "\r\n");
472 simple_body_write($self, $s);
476 my ($self, $art) = @_;
477 my $r = $self->art_lookup($art, 2);
478 return $r unless ref $r;
479 my ($n, $mid, $s) = @$r;
480 set_art($self, $art);
481 more($self, "221 $n <$mid> article retrieved - head follows");
482 do_more($self, $s->header_obj->as_string);
487 my ($self, $art) = @_;
488 my $r = $self->art_lookup($art, 0);
489 return $r unless ref $r;
490 my ($n, $mid, $s) = @$r;
491 set_art($self, $art);
492 more($self, "222 $n <$mid> article retrieved - body follows");
493 simple_body_write($self, $s);
497 my ($self, $art) = @_;
498 my $r = $self->art_lookup($art, 0);
499 return $r unless ref $r;
500 my ($n, $mid, undef) = @$r;
501 set_art($self, $art);
502 "223 $n <$mid> article retrieved - request text separately";
505 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
507 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
511 more($self, '100 help text follows');
516 my ($self, $range) = @_;
517 my $ng = $self->{ng} or return '412 no news group has been selected';
518 defined $range or return '420 No article(s) selected';
520 my ($min, $max) = $ng->mm->minmax;
521 if ($range =~ /\A(\d+)\z/) {
523 } elsif ($range =~ /\A(\d+)-\z/) {
524 ($beg, $end) = ($1, $max);
525 } elsif ($range =~ /\A(\d+)-(\d+)\z/) {
526 ($beg, $end) = ($1, $2);
530 $beg = $min if ($beg < $min);
531 $end = $max if ($end > $max);
532 return '420 No article(s) selected' if ($beg > $end);
537 my ($r, $header) = @_;
538 return $r->[3] if $header =~ /\A:?bytes\z/i;
539 return $r->[4] if $header =~ /\A:?lines\z/i;
540 $r = $r->[2]->header_obj->header($header);
541 defined $r or return;
542 $r =~ s/[\r\n\t]+/ /sg;
546 sub long_response ($$$$) {
547 my ($self, $beg, $end, $cb) = @_;
548 die "BUG: nested long response" if $self->{long_res};
550 my $fd = $self->{fd};
551 defined $fd or return;
552 # make sure we disable reading during a long response,
553 # clients should not be sending us stuff and making us do more
554 # work while we are stream a response to them
555 $self->watch_read(0);
557 $self->{long_res} = sub {
558 # limit our own running time for fairness with other
559 # clients and to avoid buffering too much:
564 eval { $cb->(\$beg) };
565 } until (($err = $@) || $self->{closed} ||
566 ++$beg > $end || !--$lim || $self->{write_buf_size});
568 if ($err || $self->{closed}) {
569 $self->{long_res} = undef;
573 "%s during long response[$fd] - %0.6f",
576 if ($self->{closed}) {
577 out($self, " deferred[$fd] aborted - %0.6f",
580 update_idle_time($self);
581 $self->watch_read(1);
583 } elsif (!$lim || $self->{write_buf_size}) {
584 # no recursion, schedule another call ASAP
585 # but only after all pending writes are done
586 update_idle_time($self);
587 Danga::Socket->AddTimer(0, sub {
588 $self->write($self->{long_res});
591 $self->{long_res} = undef;
592 $self->watch_read(1);
594 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
597 $self->{long_res}->(); # kick off!
601 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
602 my ($self, $xhdr, $range) = @_;
604 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
605 my ($ng, $n) = mid_lookup($self, $1);
606 return r430 unless $n;
607 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
608 } else { # numeric range
609 $range = $self->{article} unless defined $range;
610 my $r = get_range($self, $range);
611 return $r unless ref $r;
612 my $mm = $self->{ng}->mm;
613 my ($beg, $end) = @$r;
614 more($self, $xhdr ? r221 : r225);
615 $self->long_response($beg, $end, sub {
617 my $mid = $mm->mid_for($$i);
618 more($self, "$$i <$mid>") if defined $mid;
625 "$ng->{domain} $ng->{name}:$n"
628 sub mid_lookup ($$) {
629 my ($self, $mid) = @_;
630 my $self_ng = $self->{ng};
632 my $n = $self_ng->mm->num_for($mid);
633 return ($self_ng, $n) if defined $n;
635 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
636 next if defined $self_ng && $ng eq $self_ng;
637 my $n = $ng->mm->num_for($mid);
638 return ($ng, $n) if defined $n;
643 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
644 my ($self, $xhdr, $range) = @_;
646 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
647 my ($ng, $n) = mid_lookup($self, $1);
648 return r430 unless $n;
649 hdr_mid_response($self, $xhdr, $ng, $n, $range, xref($ng, $n));
650 } else { # numeric range
651 $range = $self->{article} unless defined $range;
652 my $r = get_range($self, $range);
653 return $r unless ref $r;
654 my $ng = $self->{ng};
656 my ($beg, $end) = @$r;
657 more($self, $xhdr ? r221 : r225);
658 $self->long_response($beg, $end, sub {
660 my $mid = $mm->mid_for($$i);
661 more($self, "$$i ".xref($ng, $$i)) if defined $mid;
666 sub search_header_for {
667 my ($srch, $mid, $field) = @_;
668 my $smsg = $srch->lookup_message($mid) or return;
669 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
673 sub hdr_searchmsg ($$$$) {
674 my ($self, $xhdr, $field, $range) = @_;
675 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
676 my ($ng, $n) = mid_lookup($self, $1);
677 return r430 unless $n;
678 my $v = search_header_for($ng->search, $range, $field);
679 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
680 } else { # numeric range
681 $range = $self->{article} unless defined $range;
682 my $srch = $self->{ng}->search;
683 my $mm = $self->{ng}->mm;
684 my $r = get_range($self, $range);
685 return $r unless ref $r;
686 my ($beg, $end) = @$r;
687 more($self, $xhdr ? r221 : r225);
689 $self->long_response($beg, $end, sub {
691 my $res = $srch->query_xover($beg, $end, $off);
692 my $msgs = $res->{msgs};
693 my $nr = scalar @$msgs or return;
696 foreach my $s (@$msgs) {
697 $tmp .= $s->num . ' ' . $s->$field . "\r\n";
699 do_more($self, $tmp);
700 # -1 to adjust for implicit increment in long_response
701 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
707 my ($self, $xhdr, $header, $range) = @_;
708 my $sub = lc $header;
709 if ($sub eq 'message-id') {
710 hdr_message_id($self, $xhdr, $range);
711 } elsif ($sub eq 'xref') {
712 hdr_xref($self, $xhdr, $range);
713 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
715 hdr_searchmsg($self, $xhdr, $sub, $range);
716 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
717 hdr_searchmsg($self, $xhdr, $1, $range);
719 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
725 my ($self, $header, $range) = @_;
726 do_hdr($self, 0, $header, $range);
730 sub cmd_xhdr ($$;$) {
731 my ($self, $header, $range) = @_;
732 do_hdr($self, 1, $header, $range);
735 sub hdr_mid_prefix ($$$$$) {
736 my ($self, $xhdr, $ng, $n, $mid) = @_;
737 return $mid if $xhdr;
739 # HDR for RFC 3977 users
740 if (my $self_ng = $self->{ng}) {
741 ($self_ng eq $ng) ? $n : '0';
747 sub hdr_mid_response ($$$$$$) {
748 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
751 $res .= r221 . "\r\n";
752 $res .= "$mid $v\r\n";
754 $res .= r225 . "\r\n";
755 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
756 $res .= "$pfx $v\r\n";
758 res($self, $res .= '.');
762 sub cmd_xrover ($;$) {
763 my ($self, $range) = @_;
764 my $ng = $self->{ng} or return '412 no newsgroup selected';
765 (defined $range && $range =~ /[<>]/) and
766 return '420 No article(s) selected'; # no message IDs
768 $range = $self->{article} unless defined $range;
769 my $r = get_range($self, $range);
770 return $r unless ref $r;
771 my ($beg, $end) = @$r;
773 my $srch = $ng->search;
774 more($self, '224 Overview information follows');
775 $self->long_response($beg, $end, sub {
777 my $mid = $mm->mid_for($$i) or return;
778 my $h = search_header_for($srch, $mid, 'references');
779 more($self, "$$i $h");
784 my ($num, $smsg) = @_;
785 # n.b. field access and procedural calls can be
786 # 10%-15% faster than OO method calls:
790 PublicInbox::SearchMsg::date($smsg),
791 '<'.PublicInbox::SearchMsg::mid($smsg).'>',
793 PublicInbox::SearchMsg::bytes($smsg),
794 PublicInbox::SearchMsg::lines($smsg));
798 my ($self, $range) = @_;
799 if ($range && $range =~ /\A<(.+)>\z/) {
800 my ($ng, $n) = mid_lookup($self, $1);
801 my $smsg = $ng->search->lookup_message($range) or
802 return '430 No article with that message-id';
803 more($self, '224 Overview information follows (multi-line)');
804 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
806 # Only set article number column if it's the current group
807 my $self_ng = $self->{ng};
808 $n = 0 if (!$self_ng || $self_ng ne $ng);
809 more($self, over_line($n, $smsg));
812 cmd_xover($self, $range);
816 sub cmd_xover ($;$) {
817 my ($self, $range) = @_;
818 $range = $self->{article} unless defined $range;
819 my $r = get_range($self, $range);
820 return $r unless ref $r;
821 my ($beg, $end) = @$r;
822 more($self, "224 Overview information follows for $beg to $end");
823 my $srch = $self->{ng}->search;
825 $self->long_response($beg, $end, sub {
827 my $res = $srch->query_xover($beg, $end, $off);
828 my $msgs = $res->{msgs};
829 my $nr = scalar @$msgs or return;
833 more($self, join("\r\n", map {
834 over_line(PublicInbox::SearchMsg::num($_), $_);
837 # -1 to adjust for implicit increment in long_response
838 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
843 my ($self, $mid) = @_;
844 return r501 unless $mid =~ /\A<(.+)>\z/;
847 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
848 my $n = $ng->mm->num_for($mid);
849 push @paths, "$ng->{name}/$n" if defined $n;
851 return '430 no such article on server' unless @paths;
852 '223 '.join(' ', @paths);
856 my ($self, $line) = @_;
857 do_write($self, $line . "\r\n");
861 my ($self, $line) = @_;
862 do_more($self, $line . "\r\n");
866 my ($self, $data) = @_;
867 my $done = $self->write($data);
868 die if $self->{closed};
870 # Do not watch for readability if we have data in the queue,
871 # instead re-enable watching for readability when we can
872 $self->watch_read(0) if (!$done || $self->{long_res});
878 my ($self, $fmt, @args) = @_;
879 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
883 my ($self, $fmt, @args) = @_;
884 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
887 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
890 my ($self, $data) = @_;
891 if (MSG_MORE && !$self->{write_buf_size}) {
892 my $n = send($self->{sock}, $data, MSG_MORE);
894 my $dlen = length($data);
895 return 1 if $n == $dlen; # all done!
896 $data = substr($data, $n, $dlen - $n);
899 $self->do_write($data);
902 # callbacks for Danga::Socket
904 sub event_hup { $_[0]->close }
905 sub event_err { $_[0]->close }
909 update_idle_time($self);
910 # only continue watching for readability when we are done writing:
911 if ($self->write(undef) == 1 && !$self->{long_res}) {
912 $self->watch_read(1);
918 use constant LINE_MAX => 512; # RFC 977 section 2.3
921 my $buf = $self->read(LINE_MAX) or return $self->close;
922 $self->{rbuf} .= $$buf;
923 while ($r > 0 && $self->{rbuf} =~ s/\A\s*([^\r\n]+)\r?\n//) {
926 my $fd = $self->{fd};
927 $r = eval { $self->process_line($line) };
928 my $d = $self->{long_res} ?
929 " deferred[$fd]" : '';
930 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
933 return $self->close if $r < 0;
934 my $len = length($self->{rbuf});
935 return $self->close if ($len >= LINE_MAX);
936 update_idle_time($self);
940 my ($self, $bool) = @_;
941 my $rv = $self->SUPER::watch_read($bool);
942 if ($bool && $self->{rbuf} ne '') {
943 # Force another read if there is a pipelined request.
944 # We don't know if the socket has anything for us to read,
945 # and we must double-check again by the time the timer fires
946 # in case we really did dispatch a read event and started
947 # another long response.
948 Danga::Socket->AddTimer(0, sub {
949 if (&Danga::Socket::POLLIN & $self->{event_watch}) {
959 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size});