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
41 my $WEAKEN = {}; # string(nntpd) -> nntpd
44 sub update_idle_time ($) {
46 my $tmp = $self->{sock} or return;
48 defined $tmp and $EXPMAP->{$tmp} = [ now(), $self ];
51 # reduce FD pressure by closing some "git cat-file --batch" processes
52 # and unused FDs for msgmap and Xapian indices
53 sub weaken_groups () {
55 foreach my $nntpd (values %$WEAKEN) {
56 $_->weaken_all foreach (@{$nntpd->{grouplist}});
64 my $old = $now - $exp;
65 my $next = $now + $exp;
68 while (my ($fd, $v) = each %$EXPMAP) {
69 my ($idle_time, $nntp) = @$v;
70 if ($idle_time < $old) {
71 $nntp->close; # idempotent
73 my $nexp = $idle_time + $exp;
74 $next = $nexp if ($nexp < $next);
82 $next = 0 if $next < 0;
83 $EXPTIMER = Danga::Socket->AddTimer($next, *expire_old);
87 # noop to kick outselves out of the loop ASAP so descriptors
89 Danga::Socket->AddTimer(0, sub {});
91 # grace period for reaping resources
92 $WEAKTIMER ||= Danga::Socket->AddTimer(30, *weaken_groups);
97 my ($class, $sock, $nntpd) = @_;
98 my $self = fields::new($class);
99 binmode $sock, ':utf8'; # RFC 3977
100 $self->SUPER::new($sock);
101 $self->{nntpd} = $nntpd;
102 res($self, '201 server ready - post via email');
104 $self->watch_read(1);
105 update_idle_time($self);
106 $WEAKEN->{"$nntpd"} = $nntpd;
107 $EXPTIMER ||= Danga::Socket->AddTimer($EXPTIME, *expire_old);
112 my ($cb, $argc) = @_;
113 my $tot = prototype $cb;
114 my ($nreq, undef) = split(';', $tot);
115 $nreq = ($nreq =~ tr/$//) - 1;
116 $tot = ($tot =~ tr/$//) - 1;
117 ($argc <= $tot && $argc >= $nreq);
120 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
121 sub process_line ($$) {
123 my ($req, @args) = split(/\s+/, $l);
127 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
129 return res($self, '500 command not recognized') unless $req;
130 return res($self, r501) unless args_ok($req, scalar @args);
132 my $res = eval { $req->($self, @args) };
134 if ($err && !$self->{closed}) {
135 chomp($l = Dumper(\$l));
136 err($self, 'error from: %s (%s)', $l, $err);
137 $res = '503 program fault - command not performed';
139 return 0 unless defined $res;
144 my ($self, $arg) = @_;
146 return r501 unless $arg eq 'READER';
147 '201 Posting prohibited';
150 sub cmd_slave ($) { '202 slave status noted' }
152 sub cmd_xgtitle ($;$) {
153 my ($self, $wildmat) = @_;
154 more($self, '282 list of groups and descriptions follows');
155 list_newsgroups($self, $wildmat);
159 sub list_overview_fmt ($) {
161 do_more($self, $OVERVIEW_FMT);
164 sub list_headers ($;$) {
166 do_more($self, $LIST_HEADERS);
169 sub list_active ($;$) {
170 my ($self, $wildmat) = @_;
171 wildmat2re($wildmat);
172 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
173 $ng->{name} =~ $wildmat or next;
174 group_line($self, $ng);
178 sub list_active_times ($;$) {
179 my ($self, $wildmat) = @_;
180 wildmat2re($wildmat);
181 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
182 $ng->{name} =~ $wildmat or next;
183 my $c = eval { $ng->mm->created_at } || time;
184 more($self, "$ng->{name} $c $ng->{address}");
188 sub list_newsgroups ($;$) {
189 my ($self, $wildmat) = @_;
190 wildmat2re($wildmat);
191 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
192 $ng->{name} =~ $wildmat or next;
193 my $d = $ng->description;
194 more($self, "$ng->{name} $d");
198 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
199 sub cmd_list ($;$$) {
200 my ($self, @args) = @_;
202 my $arg = shift @args;
203 $arg =~ tr/A-Z./a-z_/;
205 return r501 if $DISABLED{$arg};
211 return r501 unless $arg && args_ok($arg, scalar @args);
212 more($self, '215 information follows');
213 $arg->($self, @args);
215 more($self, '215 list of newsgroups follows');
216 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
217 group_line($self, $ng);
223 sub cmd_listgroup ($;$) {
224 my ($self, $group) = @_;
225 if (defined $group) {
226 my $res = cmd_group($self, $group);
227 return $res if ($res !~ /\A211 /);
231 $self->{ng} or return '412 no newsgroup selected';
232 long_response($self, 0, long_response_limit, sub {
234 my $nr = $self->{ng}->mm->id_batch($$i, sub {
236 more($self, join("\r\n", @$ary));
239 # -1 to adjust for implicit increment in long_response
240 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
244 sub parse_time ($$;$) {
245 my ($date, $time, $gmt) = @_;
246 use Time::Local qw();
247 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
249 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt";
252 my @now = $gmt ? gmtime : localtime;
253 my ($YYYY, $MM, $DD);
254 if (length($date) == 8) { # RFC 3977 allows YYYYMMDD
255 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
256 } else { # legacy clients send YYMMDD
257 ($YYYY, $MM, $DD) = unpack('A2A2A2', $date);
258 if ($YYYY > strftime('%y', @now)) {
259 my $cur_year = $now[5] + 1900;
260 $YYYY += int($cur_year / 1000) * 1000 - 100;
264 Time::Local::timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
266 Time::Local::timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
270 sub group_line ($$) {
271 my ($self, $ng) = @_;
272 my ($min, $max) = $ng->mm->minmax;
273 more($self, "$ng->{name} $max $min n") if defined $min && defined $max;
276 sub cmd_newgroups ($$$;$$) {
277 my ($self, $date, $time, $gmt, $dists) = @_;
278 my $ts = eval { parse_time($date, $time, $gmt) };
282 more($self, '231 list of new newsgroups follows');
283 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
284 my $c = eval { $ng->mm->created_at } || 0;
285 next unless $c > $ts;
286 group_line($self, $ng);
291 sub wildmat2re (;$) {
292 return $_[0] = qr/.*/ if (!defined $_[0] || $_[0] eq '*');
295 use Digest::SHA qw(sha1_hex);
298 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
300 my $key = sha1_hex($orig . $salt);
301 $orig =~ s/([^\w\-])+/\Q$1/g;
305 my %map = ('*' => '.*', '?' => '.' );
306 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
308 $tmp =~ s#([a-f0-9]{40})#
309 my $orig = $keep{$1};
310 defined $orig ? $orig : $1;
313 $_[0] = qr/\A$tmp\z/;
317 return $_[0] = qr/\A\z/ unless defined $_[0];
318 my %map = ('*' => '.*', ',' => '|');
319 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
320 $_[0] = qr/\A(?:$_[0])\z/;
323 sub cmd_newnews ($$$$;$$) {
324 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
325 my $ts = eval { parse_time($date, $time, $gmt) };
327 more($self, '230 list of new articles by message-id follows');
328 my ($keep, $skip) = split('!', $newsgroups, 2);
332 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
333 $ng->{name} =~ $keep or next;
334 $ng->{name} =~ $skip and next;
335 my $srch = $ng->search or next;
338 return '.' unless @srch;
341 my $opts = { asc => 1, limit => 1000, offset => 0 };
342 long_response($self, 0, long_response_limit, sub {
345 my $res = $srch->query($ts, $opts);
346 my $msgs = $res->{msgs};
347 if (my $nr = scalar @$msgs) {
349 join(">\r\n<", map { $_->mid } @$msgs ).
351 $opts->{offset} += $nr;
354 if (@srch) { # continue onto next newsgroup
356 } else { # break out of the long response.
357 $$i = long_response_limit;
364 my ($self, $group) = @_;
365 my $no_such = '411 no such news group';
366 my $ng = $self->{nntpd}->{groups}->{$group} or return $no_such;
369 my ($min, $max) = $ng->mm->minmax;
372 $self->{article} = $min;
373 my $est_size = $max - $min;
374 "211 $est_size $min $max $group";
377 sub article_adj ($$) {
378 my ($self, $off) = @_;
379 my $ng = $self->{ng} or return '412 no newsgroup selected';
381 my $n = $self->{article};
382 defined $n or return '420 no current article has been selected';
385 my $mid = $ng->mm->mid_for($n);
387 $n = $off > 0 ? 'next' : 'previous';
388 return "421 no $n article in this group";
390 $self->{article} = $n;
391 "223 $n <$mid> article retrieved - request text separately";
394 sub cmd_next ($) { article_adj($_[0], 1) }
395 sub cmd_last ($) { article_adj($_[0], -1) }
397 # We want to encourage using email and CC-ing everybody involved to avoid
398 # the single-point-of-failure a single server provides.
401 my $ng = $self->{ng};
402 $ng ? "440 mailto:$ng->{address} to post" : '440 posting not allowed'
407 res($self, '205 closing connection - goodbye!');
412 sub art_lookup ($$$) {
413 my ($self, $art, $set_headers) = @_;
414 my $ng = $self->{ng};
418 if ($art =~ /\A\d+\z/o) {
419 $err = '423 no such article number in this group';
422 } elsif ($art =~ /\A<([^>]+)>\z/) {
425 $n = $ng->mm->num_for($mid) if $ng;
426 goto found if defined $n;
427 foreach my $g (values %{$self->{nntpd}->{groups}}) {
428 $n = $g->mm->num_for($mid);
439 $err = '420 no current article has been selected';
440 $n = $self->{article};
441 defined $n or return $err;
443 $ng or return '412 no newsgroup has been selected';
444 $mid = $ng->mm->mid_for($n);
445 defined $mid or return $err;
448 my $o = 'HEAD:' . mid2path($mid);
450 my $s = eval { Email::MIME->new($ng->gcf->cat_file($o, \$bytes)) };
451 return $err unless $s;
454 $s->header_set('Newsgroups', $ng->{name});
455 $s->header_set('Xref', xref($ng, $n));
456 $lines = $s->body =~ tr!\n!\n!;
459 $s->body_set('') if ($set_headers == 2);
461 [ $n, $mid, $s, $bytes, $lines, $ng ];
464 sub simple_body_write ($$) {
468 $body =~ s/^\./../smg;
469 $body =~ s/(?<!\r)\n/\r\n/sg;
470 do_more($self, $body);
471 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
476 my ($self, $art) = @_;
477 $self->{article} = $art if defined $art && $art =~ /\A\d+\z/;
480 sub cmd_article ($;$) {
481 my ($self, $art) = @_;
482 my $r = art_lookup($self, $art, 1);
483 return $r unless ref $r;
484 my ($n, $mid, $s) = @$r;
485 set_art($self, $art);
486 more($self, "220 $n <$mid> article retrieved - head and body follow");
487 do_more($self, $s->header_obj->as_string);
488 do_more($self, "\r\n");
489 simple_body_write($self, $s);
493 my ($self, $art) = @_;
494 my $r = art_lookup($self, $art, 2);
495 return $r unless ref $r;
496 my ($n, $mid, $s) = @$r;
497 set_art($self, $art);
498 more($self, "221 $n <$mid> article retrieved - head follows");
499 do_more($self, $s->header_obj->as_string);
504 my ($self, $art) = @_;
505 my $r = art_lookup($self, $art, 0);
506 return $r unless ref $r;
507 my ($n, $mid, $s) = @$r;
508 set_art($self, $art);
509 more($self, "222 $n <$mid> article retrieved - body follows");
510 simple_body_write($self, $s);
514 my ($self, $art) = @_;
515 my $r = art_lookup($self, $art, 0);
516 return $r unless ref $r;
517 my ($n, $mid, undef) = @$r;
518 set_art($self, $art);
519 "223 $n <$mid> article retrieved - request text separately";
522 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
524 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
528 more($self, '100 help text follows');
533 my ($self, $range) = @_;
534 my $ng = $self->{ng} or return '412 no news group has been selected';
535 defined $range or return '420 No article(s) selected';
537 my ($min, $max) = $ng->mm->minmax;
538 if ($range =~ /\A(\d+)\z/) {
540 } elsif ($range =~ /\A(\d+)-\z/) {
541 ($beg, $end) = ($1, $max);
542 } elsif ($range =~ /\A(\d+)-(\d+)\z/) {
543 ($beg, $end) = ($1, $2);
547 $beg = $min if ($beg < $min);
548 $end = $max if ($end > $max);
549 return '420 No article(s) selected' if ($beg > $end);
553 sub long_response ($$$$) {
554 my ($self, $beg, $end, $cb) = @_;
555 die "BUG: nested long response" if $self->{long_res};
557 my $fd = $self->{fd};
558 defined $fd or return;
559 # make sure we disable reading during a long response,
560 # clients should not be sending us stuff and making us do more
561 # work while we are stream a response to them
562 $self->watch_read(0);
564 $self->{long_res} = sub {
565 # limit our own running time for fairness with other
566 # clients and to avoid buffering too much:
571 eval { $cb->(\$beg) };
572 } until (($err = $@) || $self->{closed} ||
573 ++$beg > $end || !--$lim || $self->{write_buf_size});
575 if ($err || $self->{closed}) {
576 $self->{long_res} = undef;
580 "%s during long response[$fd] - %0.6f",
583 if ($self->{closed}) {
584 out($self, " deferred[$fd] aborted - %0.6f",
587 update_idle_time($self);
588 $self->watch_read(1);
590 } elsif (!$lim || $self->{write_buf_size}) {
591 # no recursion, schedule another call ASAP
592 # but only after all pending writes are done
593 update_idle_time($self);
594 Danga::Socket->AddTimer(0, sub {
595 $self->write($self->{long_res});
598 $self->{long_res} = undef;
599 $self->watch_read(1);
601 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
604 $self->{long_res}->(); # kick off!
608 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
609 my ($self, $xhdr, $range) = @_;
611 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
612 my ($ng, $n) = mid_lookup($self, $1);
613 return r430 unless $n;
614 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
615 } else { # numeric range
616 $range = $self->{article} unless defined $range;
617 my $r = get_range($self, $range);
618 return $r unless ref $r;
619 my $mm = $self->{ng}->mm;
620 my ($beg, $end) = @$r;
621 more($self, $xhdr ? r221 : r225);
622 long_response($self, $beg, $end, sub {
624 my $mid = $mm->mid_for($$i);
625 more($self, "$$i <$mid>") if defined $mid;
632 "$ng->{domain} $ng->{name}:$n"
635 sub mid_lookup ($$) {
636 my ($self, $mid) = @_;
637 my $self_ng = $self->{ng};
639 my $n = $self_ng->mm->num_for($mid);
640 return ($self_ng, $n) if defined $n;
642 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
643 next if defined $self_ng && $ng eq $self_ng;
644 my $n = $ng->mm->num_for($mid);
645 return ($ng, $n) if defined $n;
650 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
651 my ($self, $xhdr, $range) = @_;
653 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
654 my ($ng, $n) = mid_lookup($self, $1);
655 return r430 unless $n;
656 hdr_mid_response($self, $xhdr, $ng, $n, $range, xref($ng, $n));
657 } else { # numeric range
658 $range = $self->{article} unless defined $range;
659 my $r = get_range($self, $range);
660 return $r unless ref $r;
661 my $ng = $self->{ng};
663 my ($beg, $end) = @$r;
664 more($self, $xhdr ? r221 : r225);
665 long_response($self, $beg, $end, sub {
667 my $mid = $mm->mid_for($$i);
668 more($self, "$$i ".xref($ng, $$i)) if defined $mid;
673 sub search_header_for {
674 my ($srch, $mid, $field) = @_;
675 my $smsg = $srch->lookup_message($mid) or return;
676 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
680 sub hdr_searchmsg ($$$$) {
681 my ($self, $xhdr, $field, $range) = @_;
682 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
683 my ($ng, $n) = mid_lookup($self, $1);
684 return r430 unless $n;
685 my $v = search_header_for($ng->search, $range, $field);
686 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
687 } else { # numeric range
688 $range = $self->{article} unless defined $range;
689 my $srch = $self->{ng}->search;
690 my $mm = $self->{ng}->mm;
691 my $r = get_range($self, $range);
692 return $r unless ref $r;
693 my ($beg, $end) = @$r;
694 more($self, $xhdr ? r221 : r225);
696 long_response($self, $beg, $end, sub {
698 my $res = $srch->query_xover($beg, $end, $off);
699 my $msgs = $res->{msgs};
700 my $nr = scalar @$msgs or return;
703 foreach my $s (@$msgs) {
704 $tmp .= $s->num . ' ' . $s->$field . "\r\n";
706 do_more($self, $tmp);
707 # -1 to adjust for implicit increment in long_response
708 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
714 my ($self, $xhdr, $header, $range) = @_;
715 my $sub = lc $header;
716 if ($sub eq 'message-id') {
717 hdr_message_id($self, $xhdr, $range);
718 } elsif ($sub eq 'xref') {
719 hdr_xref($self, $xhdr, $range);
720 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
722 hdr_searchmsg($self, $xhdr, $sub, $range);
723 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
724 hdr_searchmsg($self, $xhdr, $1, $range);
726 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
732 my ($self, $header, $range) = @_;
733 do_hdr($self, 0, $header, $range);
737 sub cmd_xhdr ($$;$) {
738 my ($self, $header, $range) = @_;
739 do_hdr($self, 1, $header, $range);
742 sub hdr_mid_prefix ($$$$$) {
743 my ($self, $xhdr, $ng, $n, $mid) = @_;
744 return $mid if $xhdr;
746 # HDR for RFC 3977 users
747 if (my $self_ng = $self->{ng}) {
748 ($self_ng eq $ng) ? $n : '0';
754 sub hdr_mid_response ($$$$$$) {
755 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
758 $res .= r221 . "\r\n";
759 $res .= "$mid $v\r\n";
761 $res .= r225 . "\r\n";
762 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
763 $res .= "$pfx $v\r\n";
765 res($self, $res .= '.');
769 sub cmd_xrover ($;$) {
770 my ($self, $range) = @_;
771 my $ng = $self->{ng} or return '412 no newsgroup selected';
772 (defined $range && $range =~ /[<>]/) and
773 return '420 No article(s) selected'; # no message IDs
775 $range = $self->{article} unless defined $range;
776 my $r = get_range($self, $range);
777 return $r unless ref $r;
778 my ($beg, $end) = @$r;
780 my $srch = $ng->search;
781 more($self, '224 Overview information follows');
782 long_response($self, $beg, $end, sub {
784 my $mid = $mm->mid_for($$i) or return;
785 my $h = search_header_for($srch, $mid, 'references');
786 more($self, "$$i $h");
791 my ($num, $smsg) = @_;
792 # n.b. field access and procedural calls can be
793 # 10%-15% faster than OO method calls:
797 PublicInbox::SearchMsg::date($smsg),
798 '<'.PublicInbox::SearchMsg::mid($smsg).'>',
800 PublicInbox::SearchMsg::bytes($smsg),
801 PublicInbox::SearchMsg::lines($smsg));
805 my ($self, $range) = @_;
806 if ($range && $range =~ /\A<(.+)>\z/) {
807 my ($ng, $n) = mid_lookup($self, $1);
808 my $smsg = $ng->search->lookup_message($range) or
809 return '430 No article with that message-id';
810 more($self, '224 Overview information follows (multi-line)');
811 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
813 # Only set article number column if it's the current group
814 my $self_ng = $self->{ng};
815 $n = 0 if (!$self_ng || $self_ng ne $ng);
816 more($self, over_line($n, $smsg));
819 cmd_xover($self, $range);
823 sub cmd_xover ($;$) {
824 my ($self, $range) = @_;
825 $range = $self->{article} unless defined $range;
826 my $r = get_range($self, $range);
827 return $r unless ref $r;
828 my ($beg, $end) = @$r;
829 more($self, "224 Overview information follows for $beg to $end");
830 my $srch = $self->{ng}->search;
832 long_response($self, $beg, $end, sub {
834 my $res = $srch->query_xover($beg, $end, $off);
835 my $msgs = $res->{msgs};
836 my $nr = scalar @$msgs or return;
840 more($self, join("\r\n", map {
841 over_line(PublicInbox::SearchMsg::num($_), $_);
844 # -1 to adjust for implicit increment in long_response
845 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
850 my ($self, $mid) = @_;
851 return r501 unless $mid =~ /\A<(.+)>\z/;
854 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
855 my $n = $ng->mm->num_for($mid);
856 push @paths, "$ng->{name}/$n" if defined $n;
858 return '430 no such article on server' unless @paths;
859 '223 '.join(' ', @paths);
863 my ($self, $line) = @_;
864 do_write($self, $line . "\r\n");
868 my ($self, $line) = @_;
869 do_more($self, $line . "\r\n");
873 my ($self, $data) = @_;
874 my $done = $self->write($data);
875 die if $self->{closed};
877 # Do not watch for readability if we have data in the queue,
878 # instead re-enable watching for readability when we can
879 $self->watch_read(0) if (!$done || $self->{long_res});
885 my ($self, $fmt, @args) = @_;
886 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
890 my ($self, $fmt, @args) = @_;
891 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
894 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
897 my ($self, $data) = @_;
898 if (MSG_MORE && !$self->{write_buf_size}) {
899 my $n = send($self->{sock}, $data, MSG_MORE);
901 my $dlen = length($data);
902 return 1 if $n == $dlen; # all done!
903 $data = substr($data, $n, $dlen - $n);
906 do_write($self, $data);
909 # callbacks for Danga::Socket
911 sub event_hup { $_[0]->close }
912 sub event_err { $_[0]->close }
916 update_idle_time($self);
917 # only continue watching for readability when we are done writing:
918 if ($self->write(undef) == 1 && !$self->{long_res}) {
919 $self->watch_read(1);
925 use constant LINE_MAX => 512; # RFC 977 section 2.3
928 my $buf = $self->read(LINE_MAX) or return $self->close;
929 $self->{rbuf} .= $$buf;
930 while ($r > 0 && $self->{rbuf} =~ s/\A\s*([^\r\n]+)\r?\n//) {
933 my $fd = $self->{fd};
934 $r = eval { process_line($self, $line) };
935 my $d = $self->{long_res} ?
936 " deferred[$fd]" : '';
937 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
940 return $self->close if $r < 0;
941 my $len = length($self->{rbuf});
942 return $self->close if ($len >= LINE_MAX);
943 update_idle_time($self);
947 my ($self, $bool) = @_;
948 my $rv = $self->SUPER::watch_read($bool);
949 if ($bool && $self->{rbuf} ne '') {
950 # Force another read if there is a pipelined request.
951 # We don't know if the socket has anything for us to read,
952 # and we must double-check again by the time the timer fires
953 # in case we really did dispatch a read event and started
954 # another long response.
955 Danga::Socket->AddTimer(0, sub {
956 if (&Danga::Socket::POLLIN & $self->{event_watch}) {
964 # for graceful shutdown in PublicInbox::Daemon:
967 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size});