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
50 foreach my $nntp (@$q) {
51 # for request && response protocols, always finish writing
52 # before finishing reading:
53 if (my $long_cb = $nntp->{long_res}) {
54 $nntp->write($long_cb);
55 } elsif (&Danga::Socket::POLLIN & $nntp->{event_watch}) {
61 sub update_idle_time ($) {
63 my $tmp = $self->{sock} or return;
65 defined $tmp and $EXPMAP->{$tmp} = [ now(), $self ];
68 # reduce FD pressure by closing some "git cat-file --batch" processes
69 # and unused FDs for msgmap and Xapian indices
70 sub weaken_groups () {
72 foreach my $nntpd (values %$WEAKEN) {
73 $_->weaken_all foreach (@{$nntpd->{grouplist}});
81 my $old = $now - $exp;
82 my $next = $now + $exp;
85 while (my ($fd, $v) = each %$EXPMAP) {
86 my ($idle_time, $nntp) = @$v;
87 if ($idle_time < $old) {
88 $nntp->close; # idempotent
90 my $nexp = $idle_time + $exp;
91 $next = $nexp if ($nexp < $next);
99 $next = 0 if $next < 0;
100 $EXPTIMER = Danga::Socket->AddTimer($next, *expire_old);
104 # noop to kick outselves out of the loop ASAP so descriptors
106 Danga::Socket->AddTimer(0, sub {});
108 # grace period for reaping resources
109 $WEAKTIMER ||= Danga::Socket->AddTimer(30, *weaken_groups);
114 my ($class, $sock, $nntpd) = @_;
115 my $self = fields::new($class);
116 binmode $sock, ':utf8'; # RFC 3977
117 $self->SUPER::new($sock);
118 $self->{nntpd} = $nntpd;
119 res($self, '201 server ready - post via email');
121 $self->watch_read(1);
122 update_idle_time($self);
123 $WEAKEN->{"$nntpd"} = $nntpd;
124 $EXPTIMER ||= Danga::Socket->AddTimer($EXPTIME, *expire_old);
129 my ($cb, $argc) = @_;
130 my $tot = prototype $cb;
131 my ($nreq, undef) = split(';', $tot);
132 $nreq = ($nreq =~ tr/$//) - 1;
133 $tot = ($tot =~ tr/$//) - 1;
134 ($argc <= $tot && $argc >= $nreq);
137 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
138 sub process_line ($$) {
140 my ($req, @args) = split(/\s+/, $l);
144 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
146 return res($self, '500 command not recognized') unless $req;
147 return res($self, r501) unless args_ok($req, scalar @args);
149 my $res = eval { $req->($self, @args) };
151 if ($err && !$self->{closed}) {
152 chomp($l = Dumper(\$l));
153 err($self, 'error from: %s (%s)', $l, $err);
154 $res = '503 program fault - command not performed';
156 return 0 unless defined $res;
161 my ($self, $arg) = @_;
163 return r501 unless $arg eq 'READER';
164 '201 Posting prohibited';
167 sub cmd_slave ($) { '202 slave status noted' }
169 sub cmd_xgtitle ($;$) {
170 my ($self, $wildmat) = @_;
171 more($self, '282 list of groups and descriptions follows');
172 list_newsgroups($self, $wildmat);
176 sub list_overview_fmt ($) {
178 do_more($self, $OVERVIEW_FMT);
181 sub list_headers ($;$) {
183 do_more($self, $LIST_HEADERS);
186 sub list_active ($;$) {
187 my ($self, $wildmat) = @_;
188 wildmat2re($wildmat);
189 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
190 $ng->{name} =~ $wildmat or next;
191 group_line($self, $ng);
195 sub list_active_times ($;$) {
196 my ($self, $wildmat) = @_;
197 wildmat2re($wildmat);
198 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
199 $ng->{name} =~ $wildmat or next;
200 my $c = eval { $ng->mm->created_at } || time;
201 more($self, "$ng->{name} $c $ng->{address}");
205 sub list_newsgroups ($;$) {
206 my ($self, $wildmat) = @_;
207 wildmat2re($wildmat);
208 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
209 $ng->{name} =~ $wildmat or next;
210 my $d = $ng->description;
211 more($self, "$ng->{name} $d");
215 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
216 sub cmd_list ($;$$) {
217 my ($self, @args) = @_;
219 my $arg = shift @args;
220 $arg =~ tr/A-Z./a-z_/;
222 return r501 if $DISABLED{$arg};
228 return r501 unless $arg && args_ok($arg, scalar @args);
229 more($self, '215 information follows');
230 $arg->($self, @args);
232 more($self, '215 list of newsgroups follows');
233 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
234 group_line($self, $ng);
240 sub cmd_listgroup ($;$) {
241 my ($self, $group) = @_;
242 if (defined $group) {
243 my $res = cmd_group($self, $group);
244 return $res if ($res !~ /\A211 /);
248 $self->{ng} or return '412 no newsgroup selected';
249 long_response($self, 0, long_response_limit, sub {
251 my $nr = $self->{ng}->mm->id_batch($$i, sub {
253 more($self, join("\r\n", @$ary));
256 # -1 to adjust for implicit increment in long_response
257 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
261 sub parse_time ($$;$) {
262 my ($date, $time, $gmt) = @_;
263 use Time::Local qw();
264 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
266 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt";
269 my @now = $gmt ? gmtime : localtime;
270 my ($YYYY, $MM, $DD);
271 if (length($date) == 8) { # RFC 3977 allows YYYYMMDD
272 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
273 } else { # legacy clients send YYMMDD
274 ($YYYY, $MM, $DD) = unpack('A2A2A2', $date);
275 if ($YYYY > strftime('%y', @now)) {
276 my $cur_year = $now[5] + 1900;
277 $YYYY += int($cur_year / 1000) * 1000 - 100;
281 Time::Local::timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
283 Time::Local::timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
287 sub group_line ($$) {
288 my ($self, $ng) = @_;
289 my ($min, $max) = $ng->mm->minmax;
290 more($self, "$ng->{name} $max $min n") if defined $min && defined $max;
293 sub cmd_newgroups ($$$;$$) {
294 my ($self, $date, $time, $gmt, $dists) = @_;
295 my $ts = eval { parse_time($date, $time, $gmt) };
299 more($self, '231 list of new newsgroups follows');
300 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
301 my $c = eval { $ng->mm->created_at } || 0;
302 next unless $c > $ts;
303 group_line($self, $ng);
308 sub wildmat2re (;$) {
309 return $_[0] = qr/.*/ if (!defined $_[0] || $_[0] eq '*');
312 use Digest::SHA qw(sha1_hex);
315 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
317 my $key = sha1_hex($orig . $salt);
318 $orig =~ s/([^\w\-])+/\Q$1/g;
322 my %map = ('*' => '.*', '?' => '.' );
323 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
325 $tmp =~ s#([a-f0-9]{40})#
326 my $orig = $keep{$1};
327 defined $orig ? $orig : $1;
330 $_[0] = qr/\A$tmp\z/;
334 return $_[0] = qr/\A\z/ unless defined $_[0];
335 my %map = ('*' => '.*', ',' => '|');
336 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
337 $_[0] = qr/\A(?:$_[0])\z/;
340 sub cmd_newnews ($$$$;$$) {
341 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
342 my $ts = eval { parse_time($date, $time, $gmt) };
344 more($self, '230 list of new articles by message-id follows');
345 my ($keep, $skip) = split('!', $newsgroups, 2);
349 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
350 $ng->{name} =~ $keep or next;
351 $ng->{name} =~ $skip and next;
352 my $srch = $ng->search or next;
355 return '.' unless @srch;
358 my $opts = { asc => 1, limit => 1000, offset => 0 };
359 long_response($self, 0, long_response_limit, sub {
362 my $res = $srch->query($ts, $opts);
363 my $msgs = $res->{msgs};
364 if (my $nr = scalar @$msgs) {
366 join(">\r\n<", map { $_->mid } @$msgs ).
368 $opts->{offset} += $nr;
371 if (@srch) { # continue onto next newsgroup
373 } else { # break out of the long response.
374 $$i = long_response_limit;
381 my ($self, $group) = @_;
382 my $no_such = '411 no such news group';
383 my $ng = $self->{nntpd}->{groups}->{$group} or return $no_such;
386 my ($min, $max) = $ng->mm->minmax;
389 $self->{article} = $min;
390 my $est_size = $max - $min;
391 "211 $est_size $min $max $group";
394 sub article_adj ($$) {
395 my ($self, $off) = @_;
396 my $ng = $self->{ng} or return '412 no newsgroup selected';
398 my $n = $self->{article};
399 defined $n or return '420 no current article has been selected';
402 my $mid = $ng->mm->mid_for($n);
404 $n = $off > 0 ? 'next' : 'previous';
405 return "421 no $n article in this group";
407 $self->{article} = $n;
408 "223 $n <$mid> article retrieved - request text separately";
411 sub cmd_next ($) { article_adj($_[0], 1) }
412 sub cmd_last ($) { article_adj($_[0], -1) }
414 # We want to encourage using email and CC-ing everybody involved to avoid
415 # the single-point-of-failure a single server provides.
418 my $ng = $self->{ng};
419 $ng ? "440 mailto:$ng->{address} to post" : '440 posting not allowed'
424 res($self, '205 closing connection - goodbye!');
429 sub art_lookup ($$$) {
430 my ($self, $art, $set_headers) = @_;
431 my $ng = $self->{ng};
435 if ($art =~ /\A\d+\z/o) {
436 $err = '423 no such article number in this group';
439 } elsif ($art =~ /\A<([^>]+)>\z/) {
442 $n = $ng->mm->num_for($mid) if $ng;
443 goto found if defined $n;
444 foreach my $g (values %{$self->{nntpd}->{groups}}) {
445 $n = $g->mm->num_for($mid);
456 $err = '420 no current article has been selected';
457 $n = $self->{article};
458 defined $n or return $err;
460 $ng or return '412 no newsgroup has been selected';
461 $mid = $ng->mm->mid_for($n);
462 defined $mid or return $err;
465 my $o = 'HEAD:' . mid2path($mid);
467 my $s = eval { Email::MIME->new($ng->gcf->cat_file($o, \$bytes)) };
468 return $err unless $s;
471 $s->header_set('Newsgroups', $ng->{name});
472 $s->header_set('Xref', xref($ng, $n));
473 $lines = $s->body =~ tr!\n!\n!;
476 $s->body_set('') if ($set_headers == 2);
478 [ $n, $mid, $s, $bytes, $lines, $ng ];
481 sub simple_body_write ($$) {
485 $body =~ s/^\./../smg;
486 $body =~ s/(?<!\r)\n/\r\n/sg;
487 do_more($self, $body);
488 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
493 my ($self, $art) = @_;
494 $self->{article} = $art if defined $art && $art =~ /\A\d+\z/;
497 sub cmd_article ($;$) {
498 my ($self, $art) = @_;
499 my $r = art_lookup($self, $art, 1);
500 return $r unless ref $r;
501 my ($n, $mid, $s) = @$r;
502 set_art($self, $art);
503 more($self, "220 $n <$mid> article retrieved - head and body follow");
504 do_more($self, $s->header_obj->as_string);
505 do_more($self, "\r\n");
506 simple_body_write($self, $s);
510 my ($self, $art) = @_;
511 my $r = art_lookup($self, $art, 2);
512 return $r unless ref $r;
513 my ($n, $mid, $s) = @$r;
514 set_art($self, $art);
515 more($self, "221 $n <$mid> article retrieved - head follows");
516 do_more($self, $s->header_obj->as_string);
521 my ($self, $art) = @_;
522 my $r = art_lookup($self, $art, 0);
523 return $r unless ref $r;
524 my ($n, $mid, $s) = @$r;
525 set_art($self, $art);
526 more($self, "222 $n <$mid> article retrieved - body follows");
527 simple_body_write($self, $s);
531 my ($self, $art) = @_;
532 my $r = art_lookup($self, $art, 0);
533 return $r unless ref $r;
534 my ($n, $mid, undef) = @$r;
535 set_art($self, $art);
536 "223 $n <$mid> article retrieved - request text separately";
539 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
541 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
545 more($self, '100 help text follows');
550 my ($self, $range) = @_;
551 my $ng = $self->{ng} or return '412 no news group has been selected';
552 defined $range or return '420 No article(s) selected';
554 my ($min, $max) = $ng->mm->minmax;
555 if ($range =~ /\A(\d+)\z/) {
557 } elsif ($range =~ /\A(\d+)-\z/) {
558 ($beg, $end) = ($1, $max);
559 } elsif ($range =~ /\A(\d+)-(\d+)\z/) {
560 ($beg, $end) = ($1, $2);
564 $beg = $min if ($beg < $min);
565 $end = $max if ($end > $max);
566 return '420 No article(s) selected' if ($beg > $end);
570 sub long_response ($$$$) {
571 my ($self, $beg, $end, $cb) = @_;
572 die "BUG: nested long response" if $self->{long_res};
574 my $fd = $self->{fd};
575 defined $fd or return;
576 # make sure we disable reading during a long response,
577 # clients should not be sending us stuff and making us do more
578 # work while we are stream a response to them
579 $self->watch_read(0);
581 $self->{long_res} = sub {
582 # limit our own running time for fairness with other
583 # clients and to avoid buffering too much:
588 eval { $cb->(\$beg) };
589 } until (($err = $@) || $self->{closed} ||
590 ++$beg > $end || !--$lim || $self->{write_buf_size});
592 if ($err || $self->{closed}) {
593 $self->{long_res} = undef;
597 "%s during long response[$fd] - %0.6f",
600 if ($self->{closed}) {
601 out($self, " deferred[$fd] aborted - %0.6f",
604 update_idle_time($self);
605 $self->watch_read(1);
607 } elsif (!$lim || $self->{write_buf_size}) {
608 # no recursion, schedule another call ASAP
609 # but only after all pending writes are done
610 update_idle_time($self);
613 $next_tick ||= Danga::Socket->AddTimer(0, *next_tick);
615 $self->{long_res} = undef;
616 $self->watch_read(1);
618 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
621 $self->{long_res}->(); # kick off!
625 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
626 my ($self, $xhdr, $range) = @_;
628 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
629 my ($ng, $n) = mid_lookup($self, $1);
630 return r430 unless $n;
631 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
632 } else { # numeric range
633 $range = $self->{article} unless defined $range;
634 my $r = get_range($self, $range);
635 return $r unless ref $r;
636 my $mm = $self->{ng}->mm;
637 my ($beg, $end) = @$r;
638 more($self, $xhdr ? r221 : r225);
639 long_response($self, $beg, $end, sub {
641 my $mid = $mm->mid_for($$i);
642 more($self, "$$i <$mid>") if defined $mid;
649 "$ng->{domain} $ng->{name}:$n"
652 sub mid_lookup ($$) {
653 my ($self, $mid) = @_;
654 my $self_ng = $self->{ng};
656 my $n = $self_ng->mm->num_for($mid);
657 return ($self_ng, $n) if defined $n;
659 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
660 next if defined $self_ng && $ng eq $self_ng;
661 my $n = $ng->mm->num_for($mid);
662 return ($ng, $n) if defined $n;
667 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
668 my ($self, $xhdr, $range) = @_;
670 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
671 my ($ng, $n) = mid_lookup($self, $1);
672 return r430 unless $n;
673 hdr_mid_response($self, $xhdr, $ng, $n, $range, xref($ng, $n));
674 } else { # numeric range
675 $range = $self->{article} unless defined $range;
676 my $r = get_range($self, $range);
677 return $r unless ref $r;
678 my $ng = $self->{ng};
680 my ($beg, $end) = @$r;
681 more($self, $xhdr ? r221 : r225);
682 long_response($self, $beg, $end, sub {
684 my $mid = $mm->mid_for($$i);
685 more($self, "$$i ".xref($ng, $$i)) if defined $mid;
690 sub search_header_for {
691 my ($srch, $mid, $field) = @_;
692 my $smsg = $srch->lookup_message($mid) or return;
693 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
697 sub hdr_searchmsg ($$$$) {
698 my ($self, $xhdr, $field, $range) = @_;
699 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
700 my ($ng, $n) = mid_lookup($self, $1);
701 return r430 unless $n;
702 my $v = search_header_for($ng->search, $range, $field);
703 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
704 } else { # numeric range
705 $range = $self->{article} unless defined $range;
706 my $srch = $self->{ng}->search;
707 my $mm = $self->{ng}->mm;
708 my $r = get_range($self, $range);
709 return $r unless ref $r;
710 my ($beg, $end) = @$r;
711 more($self, $xhdr ? r221 : r225);
713 long_response($self, $beg, $end, sub {
715 my $res = $srch->query_xover($beg, $end, $off);
716 my $msgs = $res->{msgs};
717 my $nr = scalar @$msgs or return;
720 foreach my $s (@$msgs) {
721 $tmp .= $s->num . ' ' . $s->$field . "\r\n";
723 do_more($self, $tmp);
724 # -1 to adjust for implicit increment in long_response
725 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
731 my ($self, $xhdr, $header, $range) = @_;
732 my $sub = lc $header;
733 if ($sub eq 'message-id') {
734 hdr_message_id($self, $xhdr, $range);
735 } elsif ($sub eq 'xref') {
736 hdr_xref($self, $xhdr, $range);
737 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
739 hdr_searchmsg($self, $xhdr, $sub, $range);
740 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
741 hdr_searchmsg($self, $xhdr, $1, $range);
743 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
749 my ($self, $header, $range) = @_;
750 do_hdr($self, 0, $header, $range);
754 sub cmd_xhdr ($$;$) {
755 my ($self, $header, $range) = @_;
756 do_hdr($self, 1, $header, $range);
759 sub hdr_mid_prefix ($$$$$) {
760 my ($self, $xhdr, $ng, $n, $mid) = @_;
761 return $mid if $xhdr;
763 # HDR for RFC 3977 users
764 if (my $self_ng = $self->{ng}) {
765 ($self_ng eq $ng) ? $n : '0';
771 sub hdr_mid_response ($$$$$$) {
772 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
775 $res .= r221 . "\r\n";
776 $res .= "$mid $v\r\n";
778 $res .= r225 . "\r\n";
779 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
780 $res .= "$pfx $v\r\n";
782 res($self, $res .= '.');
786 sub cmd_xrover ($;$) {
787 my ($self, $range) = @_;
788 my $ng = $self->{ng} or return '412 no newsgroup selected';
789 (defined $range && $range =~ /[<>]/) and
790 return '420 No article(s) selected'; # no message IDs
792 $range = $self->{article} unless defined $range;
793 my $r = get_range($self, $range);
794 return $r unless ref $r;
795 my ($beg, $end) = @$r;
797 my $srch = $ng->search;
798 more($self, '224 Overview information follows');
799 long_response($self, $beg, $end, sub {
801 my $mid = $mm->mid_for($$i) or return;
802 my $h = search_header_for($srch, $mid, 'references');
803 more($self, "$$i $h");
808 my ($num, $smsg) = @_;
809 # n.b. field access and procedural calls can be
810 # 10%-15% faster than OO method calls:
814 PublicInbox::SearchMsg::date($smsg),
815 '<'.PublicInbox::SearchMsg::mid($smsg).'>',
817 PublicInbox::SearchMsg::bytes($smsg),
818 PublicInbox::SearchMsg::lines($smsg));
822 my ($self, $range) = @_;
823 if ($range && $range =~ /\A<(.+)>\z/) {
824 my ($ng, $n) = mid_lookup($self, $1);
825 my $smsg = $ng->search->lookup_message($range) or
826 return '430 No article with that message-id';
827 more($self, '224 Overview information follows (multi-line)');
828 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
830 # Only set article number column if it's the current group
831 my $self_ng = $self->{ng};
832 $n = 0 if (!$self_ng || $self_ng ne $ng);
833 more($self, over_line($n, $smsg));
836 cmd_xover($self, $range);
840 sub cmd_xover ($;$) {
841 my ($self, $range) = @_;
842 $range = $self->{article} unless defined $range;
843 my $r = get_range($self, $range);
844 return $r unless ref $r;
845 my ($beg, $end) = @$r;
846 more($self, "224 Overview information follows for $beg to $end");
847 my $srch = $self->{ng}->search;
849 long_response($self, $beg, $end, sub {
851 my $res = $srch->query_xover($beg, $end, $off);
852 my $msgs = $res->{msgs};
853 my $nr = scalar @$msgs or return;
857 more($self, join("\r\n", map {
858 over_line(PublicInbox::SearchMsg::num($_), $_);
861 # -1 to adjust for implicit increment in long_response
862 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
867 my ($self, $mid) = @_;
868 return r501 unless $mid =~ /\A<(.+)>\z/;
871 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
872 my $n = $ng->mm->num_for($mid);
873 push @paths, "$ng->{name}/$n" if defined $n;
875 return '430 no such article on server' unless @paths;
876 '223 '.join(' ', @paths);
880 my ($self, $line) = @_;
881 do_write($self, $line . "\r\n");
885 my ($self, $line) = @_;
886 do_more($self, $line . "\r\n");
890 my ($self, $data) = @_;
891 my $done = $self->write($data);
892 die if $self->{closed};
894 # Do not watch for readability if we have data in the queue,
895 # instead re-enable watching for readability when we can
896 $self->watch_read(0) if (!$done || $self->{long_res});
902 my ($self, $fmt, @args) = @_;
903 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
907 my ($self, $fmt, @args) = @_;
908 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
911 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
914 my ($self, $data) = @_;
915 if (MSG_MORE && !$self->{write_buf_size}) {
916 my $n = send($self->{sock}, $data, MSG_MORE);
918 my $dlen = length($data);
919 return 1 if $n == $dlen; # all done!
920 $data = substr($data, $n, $dlen - $n);
923 do_write($self, $data);
926 # callbacks for Danga::Socket
928 sub event_hup { $_[0]->close }
929 sub event_err { $_[0]->close }
933 update_idle_time($self);
934 # only continue watching for readability when we are done writing:
935 if ($self->write(undef) == 1 && !$self->{long_res}) {
936 $self->watch_read(1);
942 use constant LINE_MAX => 512; # RFC 977 section 2.3
945 my $buf = $self->read(LINE_MAX) or return $self->close;
946 $self->{rbuf} .= $$buf;
947 while ($r > 0 && $self->{rbuf} =~ s/\A\s*([^\r\n]+)\r?\n//) {
950 my $fd = $self->{fd};
951 $r = eval { process_line($self, $line) };
952 my $d = $self->{long_res} ?
953 " deferred[$fd]" : '';
954 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
957 return $self->close if $r < 0;
958 my $len = length($self->{rbuf});
959 return $self->close if ($len >= LINE_MAX);
960 update_idle_time($self);
964 my ($self, $bool) = @_;
965 my $rv = $self->SUPER::watch_read($bool);
966 if ($bool && $self->{rbuf} ne '') {
967 # Force another read if there is a pipelined request.
968 # We don't know if the socket has anything for us to read,
969 # and we must double-check again by the time the timer fires
970 # in case we really did dispatch a read event and started
971 # another long response.
973 $next_tick ||= Danga::Socket->AddTimer(0, *next_tick);
978 # for graceful shutdown in PublicInbox::Daemon:
981 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size});