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);
18 use URI::Escape qw(uri_escape_utf8);
20 r501 => '501 command syntax error',
21 r221 => '221 Header follows',
22 r224 => '224 Overview information follows (multi-line)',
23 r225 => '225 Headers follow (multi-line)',
24 r430 => '430 No article with that message-id',
25 long_response_limit => 0xffffffff,
28 sub now () { clock_gettime(CLOCK_MONOTONIC) };
30 my @OVERVIEW = qw(Subject From Date Message-ID References);
31 my $OVERVIEW_FMT = join(":\r\n", @OVERVIEW, qw(Bytes Lines)) . ":\r\n";
32 my $LIST_HEADERS = join("\r\n", @OVERVIEW,
33 qw(:bytes :lines Xref To Cc)) . "\r\n";
35 # disable commands with easy DoS potential:
36 # LISTGROUP could get pretty bad, too...
37 my %DISABLED; # = map { $_ => 1 } qw(xover list_overview_fmt newnews xhdr);
39 my $EXPMAP; # fd -> [ idle_time, $self ]
41 our $EXPTIME = 180; # 3 minutes
42 my $WEAKEN = {}; # string(nntpd) -> nntpd
51 foreach my $nntp (@$q) {
52 # for request && response protocols, always finish writing
53 # before finishing reading:
54 if (my $long_cb = $nntp->{long_res}) {
55 $nntp->write($long_cb);
56 } elsif (&Danga::Socket::POLLIN & $nntp->{event_watch}) {
62 sub update_idle_time ($) {
64 my $tmp = $self->{sock} or return;
66 defined $tmp and $EXPMAP->{$tmp} = [ now(), $self ];
69 # reduce FD pressure by closing some "git cat-file --batch" processes
70 # and unused FDs for msgmap and Xapian indices
71 sub weaken_groups () {
73 foreach my $nntpd (values %$WEAKEN) {
74 $_->weaken_all foreach (@{$nntpd->{grouplist}});
82 my $old = $now - $exp;
83 my $next = $now + $exp;
86 while (my ($fd, $v) = each %$EXPMAP) {
87 my ($idle_time, $nntp) = @$v;
88 if ($idle_time < $old) {
89 $nntp->close; # idempotent
91 my $nexp = $idle_time + $exp;
92 $next = $nexp if ($nexp < $next);
100 $next = 0 if $next < 0;
101 $EXPTIMER = Danga::Socket->AddTimer($next, *expire_old);
105 # noop to kick outselves out of the loop ASAP so descriptors
107 Danga::Socket->AddTimer(0, sub {});
109 # grace period for reaping resources
110 $WEAKTIMER ||= Danga::Socket->AddTimer(30, *weaken_groups);
115 my ($class, $sock, $nntpd) = @_;
116 my $self = fields::new($class);
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 header_append ($$$) {
430 my ($hdr, $k, $v) = @_;
431 my @v = $hdr->header($k);
435 $hdr->header_set($k, @v, $v);
438 sub set_nntp_headers {
439 my ($hdr, $ng, $n, $mid) = @_;
442 $hdr->header_set('Newsgroups', $ng->{name});
443 $hdr->header_set('Xref', xref($ng, $n));
444 header_append($hdr, 'List-Post', "<mailto:$ng->{address}>");
445 if (my $url = $ng->{url}) {
446 $mid = uri_escape_utf8($mid);
447 header_append($hdr, 'Archived-At', "<$url$mid/>");
448 header_append($hdr, 'List-Archive', "<$url>");
452 sub art_lookup ($$$) {
453 my ($self, $art, $set_headers) = @_;
454 my $ng = $self->{ng};
458 if ($art =~ /\A\d+\z/o) {
459 $err = '423 no such article number in this group';
462 } elsif ($art =~ /\A<([^>]+)>\z/) {
465 $n = $ng->mm->num_for($mid) if $ng;
466 goto found if defined $n;
467 foreach my $g (values %{$self->{nntpd}->{groups}}) {
468 $n = $g->mm->num_for($mid);
479 $err = '420 no current article has been selected';
480 $n = $self->{article};
481 defined $n or return $err;
483 $ng or return '412 no newsgroup has been selected';
484 $mid = $ng->mm->mid_for($n);
485 defined $mid or return $err;
488 my $o = 'HEAD:' . mid2path($mid);
490 my $s = eval { Email::Simple->new($ng->gcf->cat_file($o, \$bytes)) };
491 return $err unless $s;
494 set_nntp_headers($s->header_obj, $ng, $n, $mid);
495 $lines = $s->body =~ tr!\n!\n!;
498 $s->body_set('') if ($set_headers == 2);
500 [ $n, $mid, $s, $bytes, $lines, $ng ];
503 sub simple_body_write ($$) {
507 $body =~ s/^\./../smg;
508 $body =~ s/(?<!\r)\n/\r\n/sg;
509 do_more($self, $body);
510 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
515 my ($self, $art) = @_;
516 $self->{article} = $art if defined $art && $art =~ /\A\d+\z/;
519 sub cmd_article ($;$) {
520 my ($self, $art) = @_;
521 my $r = art_lookup($self, $art, 1);
522 return $r unless ref $r;
523 my ($n, $mid, $s) = @$r;
524 set_art($self, $art);
525 more($self, "220 $n <$mid> article retrieved - head and body follow");
526 do_more($self, $s->header_obj->as_string);
527 do_more($self, "\r\n");
528 simple_body_write($self, $s);
532 my ($self, $art) = @_;
533 my $r = art_lookup($self, $art, 2);
534 return $r unless ref $r;
535 my ($n, $mid, $s) = @$r;
536 set_art($self, $art);
537 more($self, "221 $n <$mid> article retrieved - head follows");
538 do_more($self, $s->header_obj->as_string);
543 my ($self, $art) = @_;
544 my $r = art_lookup($self, $art, 0);
545 return $r unless ref $r;
546 my ($n, $mid, $s) = @$r;
547 set_art($self, $art);
548 more($self, "222 $n <$mid> article retrieved - body follows");
549 simple_body_write($self, $s);
553 my ($self, $art) = @_;
554 my $r = art_lookup($self, $art, 0);
555 return $r unless ref $r;
556 my ($n, $mid, undef) = @$r;
557 set_art($self, $art);
558 "223 $n <$mid> article retrieved - request text separately";
561 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
563 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
567 more($self, '100 help text follows');
572 my ($self, $range) = @_;
573 my $ng = $self->{ng} or return '412 no news group has been selected';
574 defined $range or return '420 No article(s) selected';
576 my ($min, $max) = $ng->mm->minmax;
577 if ($range =~ /\A(\d+)\z/) {
579 } elsif ($range =~ /\A(\d+)-\z/) {
580 ($beg, $end) = ($1, $max);
581 } elsif ($range =~ /\A(\d+)-(\d+)\z/) {
582 ($beg, $end) = ($1, $2);
586 $beg = $min if ($beg < $min);
587 $end = $max if ($end > $max);
588 return '420 No article(s) selected' if ($beg > $end);
592 sub long_response ($$$$) {
593 my ($self, $beg, $end, $cb) = @_;
594 die "BUG: nested long response" if $self->{long_res};
596 my $fd = $self->{fd};
597 defined $fd or return;
598 # make sure we disable reading during a long response,
599 # clients should not be sending us stuff and making us do more
600 # work while we are stream a response to them
601 $self->watch_read(0);
603 $self->{long_res} = sub {
604 # limit our own running time for fairness with other
605 # clients and to avoid buffering too much:
610 eval { $cb->(\$beg) };
611 } until (($err = $@) || $self->{closed} ||
612 ++$beg > $end || !--$lim || $self->{write_buf_size});
614 if ($err || $self->{closed}) {
615 $self->{long_res} = undef;
619 "%s during long response[$fd] - %0.6f",
622 if ($self->{closed}) {
623 out($self, " deferred[$fd] aborted - %0.6f",
626 update_idle_time($self);
627 $self->watch_read(1);
629 } elsif (!$lim || $self->{write_buf_size}) {
630 # no recursion, schedule another call ASAP
631 # but only after all pending writes are done
632 update_idle_time($self);
635 $next_tick ||= Danga::Socket->AddTimer(0, *next_tick);
637 $self->{long_res} = undef;
638 $self->watch_read(1);
640 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
643 $self->{long_res}->(); # kick off!
647 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
648 my ($self, $xhdr, $range) = @_;
650 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
651 my ($ng, $n) = mid_lookup($self, $1);
652 return r430 unless $n;
653 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
654 } else { # numeric range
655 $range = $self->{article} unless defined $range;
656 my $r = get_range($self, $range);
657 return $r unless ref $r;
658 my $mm = $self->{ng}->mm;
659 my ($beg, $end) = @$r;
660 more($self, $xhdr ? r221 : r225);
661 long_response($self, $beg, $end, sub {
663 my $mid = $mm->mid_for($$i);
664 more($self, "$$i <$mid>") if defined $mid;
671 "$ng->{domain} $ng->{name}:$n"
674 sub mid_lookup ($$) {
675 my ($self, $mid) = @_;
676 my $self_ng = $self->{ng};
678 my $n = $self_ng->mm->num_for($mid);
679 return ($self_ng, $n) if defined $n;
681 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
682 next if defined $self_ng && $ng eq $self_ng;
683 my $n = $ng->mm->num_for($mid);
684 return ($ng, $n) if defined $n;
689 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
690 my ($self, $xhdr, $range) = @_;
692 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
693 my ($ng, $n) = mid_lookup($self, $1);
694 return r430 unless $n;
695 hdr_mid_response($self, $xhdr, $ng, $n, $range, xref($ng, $n));
696 } else { # numeric range
697 $range = $self->{article} unless defined $range;
698 my $r = get_range($self, $range);
699 return $r unless ref $r;
700 my $ng = $self->{ng};
702 my ($beg, $end) = @$r;
703 more($self, $xhdr ? r221 : r225);
704 long_response($self, $beg, $end, sub {
706 my $mid = $mm->mid_for($$i);
707 more($self, "$$i ".xref($ng, $$i)) if defined $mid;
712 sub search_header_for {
713 my ($srch, $mid, $field) = @_;
714 my $smsg = $srch->lookup_message($mid) or return;
715 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
719 sub hdr_searchmsg ($$$$) {
720 my ($self, $xhdr, $field, $range) = @_;
721 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
722 my ($ng, $n) = mid_lookup($self, $1);
723 return r430 unless $n;
724 my $v = search_header_for($ng->search, $range, $field);
725 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
726 } else { # numeric range
727 $range = $self->{article} unless defined $range;
728 my $srch = $self->{ng}->search;
729 my $mm = $self->{ng}->mm;
730 my $r = get_range($self, $range);
731 return $r unless ref $r;
732 my ($beg, $end) = @$r;
733 more($self, $xhdr ? r221 : r225);
735 long_response($self, $beg, $end, sub {
737 my $res = $srch->query_xover($beg, $end, $off);
738 my $msgs = $res->{msgs};
739 my $nr = scalar @$msgs or return;
742 foreach my $s (@$msgs) {
743 $tmp .= $s->num . ' ' . $s->$field . "\r\n";
745 do_more($self, $tmp);
746 # -1 to adjust for implicit increment in long_response
747 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
753 my ($self, $xhdr, $header, $range) = @_;
754 my $sub = lc $header;
755 if ($sub eq 'message-id') {
756 hdr_message_id($self, $xhdr, $range);
757 } elsif ($sub eq 'xref') {
758 hdr_xref($self, $xhdr, $range);
759 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
761 hdr_searchmsg($self, $xhdr, $sub, $range);
762 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
763 hdr_searchmsg($self, $xhdr, $1, $range);
765 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
771 my ($self, $header, $range) = @_;
772 do_hdr($self, 0, $header, $range);
776 sub cmd_xhdr ($$;$) {
777 my ($self, $header, $range) = @_;
778 do_hdr($self, 1, $header, $range);
781 sub hdr_mid_prefix ($$$$$) {
782 my ($self, $xhdr, $ng, $n, $mid) = @_;
783 return $mid if $xhdr;
785 # HDR for RFC 3977 users
786 if (my $self_ng = $self->{ng}) {
787 ($self_ng eq $ng) ? $n : '0';
793 sub hdr_mid_response ($$$$$$) {
794 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
797 $res .= r221 . "\r\n";
798 $res .= "$mid $v\r\n";
800 $res .= r225 . "\r\n";
801 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
802 $res .= "$pfx $v\r\n";
804 res($self, $res .= '.');
808 sub cmd_xrover ($;$) {
809 my ($self, $range) = @_;
810 my $ng = $self->{ng} or return '412 no newsgroup selected';
811 (defined $range && $range =~ /[<>]/) and
812 return '420 No article(s) selected'; # no message IDs
814 $range = $self->{article} unless defined $range;
815 my $r = get_range($self, $range);
816 return $r unless ref $r;
817 my ($beg, $end) = @$r;
819 my $srch = $ng->search;
820 more($self, '224 Overview information follows');
821 long_response($self, $beg, $end, sub {
823 my $mid = $mm->mid_for($$i) or return;
824 my $h = search_header_for($srch, $mid, 'references');
825 more($self, "$$i $h");
830 my ($num, $smsg) = @_;
831 # n.b. field access and procedural calls can be
832 # 10%-15% faster than OO method calls:
836 PublicInbox::SearchMsg::date($smsg),
837 '<'.PublicInbox::SearchMsg::mid($smsg).'>',
839 PublicInbox::SearchMsg::bytes($smsg),
840 PublicInbox::SearchMsg::lines($smsg));
844 my ($self, $range) = @_;
845 if ($range && $range =~ /\A<(.+)>\z/) {
846 my ($ng, $n) = mid_lookup($self, $1);
847 my $smsg = $ng->search->lookup_message($range) or
848 return '430 No article with that message-id';
849 more($self, '224 Overview information follows (multi-line)');
850 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
852 # Only set article number column if it's the current group
853 my $self_ng = $self->{ng};
854 $n = 0 if (!$self_ng || $self_ng ne $ng);
855 more($self, over_line($n, $smsg));
858 cmd_xover($self, $range);
862 sub cmd_xover ($;$) {
863 my ($self, $range) = @_;
864 $range = $self->{article} unless defined $range;
865 my $r = get_range($self, $range);
866 return $r unless ref $r;
867 my ($beg, $end) = @$r;
868 more($self, "224 Overview information follows for $beg to $end");
869 my $srch = $self->{ng}->search;
871 long_response($self, $beg, $end, sub {
873 my $res = $srch->query_xover($beg, $end, $off);
874 my $msgs = $res->{msgs};
875 my $nr = scalar @$msgs or return;
879 more($self, join("\r\n", map {
880 over_line(PublicInbox::SearchMsg::num($_), $_);
883 # -1 to adjust for implicit increment in long_response
884 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
889 my ($self, $mid) = @_;
890 return r501 unless $mid =~ /\A<(.+)>\z/;
893 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
894 my $n = $ng->mm->num_for($mid);
895 push @paths, "$ng->{name}/$n" if defined $n;
897 return '430 no such article on server' unless @paths;
898 '223 '.join(' ', @paths);
902 my ($self, $line) = @_;
903 do_write($self, $line . "\r\n");
907 my ($self, $line) = @_;
908 do_more($self, $line . "\r\n");
912 my ($self, $data) = @_;
913 my $done = $self->write($data);
914 die if $self->{closed};
916 # Do not watch for readability if we have data in the queue,
917 # instead re-enable watching for readability when we can
918 $self->watch_read(0) if (!$done || $self->{long_res});
924 my ($self, $fmt, @args) = @_;
925 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
929 my ($self, $fmt, @args) = @_;
930 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
933 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
936 my ($self, $data) = @_;
937 if (MSG_MORE && !$self->{write_buf_size}) {
938 my $n = send($self->{sock}, $data, MSG_MORE);
940 my $dlen = length($data);
941 return 1 if $n == $dlen; # all done!
942 $data = substr($data, $n, $dlen - $n);
945 do_write($self, $data);
948 # callbacks for Danga::Socket
950 sub event_hup { $_[0]->close }
951 sub event_err { $_[0]->close }
955 update_idle_time($self);
956 # only continue watching for readability when we are done writing:
957 if ($self->write(undef) == 1 && !$self->{long_res}) {
958 $self->watch_read(1);
964 use constant LINE_MAX => 512; # RFC 977 section 2.3
967 my $buf = $self->read(LINE_MAX) or return $self->close;
968 $self->{rbuf} .= $$buf;
969 while ($r > 0 && $self->{rbuf} =~ s/\A\s*([^\r\n]+)\r?\n//) {
972 my $fd = $self->{fd};
973 $r = eval { process_line($self, $line) };
974 my $d = $self->{long_res} ?
975 " deferred[$fd]" : '';
976 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
979 return $self->close if $r < 0;
980 my $len = length($self->{rbuf});
981 return $self->close if ($len >= LINE_MAX);
982 update_idle_time($self);
986 my ($self, $bool) = @_;
987 my $rv = $self->SUPER::watch_read($bool);
988 if ($bool && $self->{rbuf} ne '') {
989 # Force another read if there is a pipelined request.
990 # We don't know if the socket has anything for us to read,
991 # and we must double-check again by the time the timer fires
992 # in case we really did dispatch a read event and started
993 # another long response.
995 $next_tick ||= Danga::Socket->AddTimer(0, *next_tick);
1000 # for graceful shutdown in PublicInbox::Daemon:
1003 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size});