1 # Copyright (C) 2015-2018 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <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;
12 use PublicInbox::MID qw(mid_escape);
14 require PublicInbox::EvCleanup;
16 use POSIX qw(strftime);
17 use Time::HiRes qw(clock_gettime CLOCK_MONOTONIC);
18 use Digest::SHA qw(sha1_hex);
19 use Time::Local qw(timegm timelocal);
21 r501 => '501 command syntax error',
22 r221 => '221 Header follows',
23 r224 => '224 Overview information follows (multi-line)',
24 r225 => '225 Headers follow (multi-line)',
25 r430 => '430 No article with that message-id',
26 long_response_limit => 0xffffffff,
29 sub now () { clock_gettime(CLOCK_MONOTONIC) };
31 my @OVERVIEW = qw(Subject From Date Message-ID References Xref);
32 my $OVERVIEW_FMT = join(":\r\n", @OVERVIEW, qw(Bytes Lines)) . ":\r\n";
33 my $LIST_HEADERS = join("\r\n", @OVERVIEW,
34 qw(:bytes :lines Xref To Cc)) . "\r\n";
36 # disable commands with easy DoS potential:
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
49 foreach my $nntp (@$q) {
50 # for request && response protocols, always finish writing
51 # before finishing reading:
52 if (my $long_cb = $nntp->{long_res}) {
53 $nntp->write($long_cb);
55 # pipelined request, we bypassed socket-readiness
59 # maybe there's more pipelined data, or we'll have
60 # to register it for socket-readiness notifications
61 if (!$nntp->{long_res} && !$nntp->{closed}) {
68 sub update_idle_time ($) {
71 defined $fd and $EXPMAP->{$fd} = [ now(), $self ];
77 my $old = $now - $exp;
80 while (my ($fd, $v) = each %$EXPMAP) {
81 my ($idle_time, $nntp) = @$v;
82 if ($idle_time < $old) {
83 $nntp->close; # idempotent
91 $expt = PublicInbox::EvCleanup::later(*expire_old);
94 # noop to kick outselves out of the loop ASAP so descriptors
96 PublicInbox::EvCleanup::asap(sub {});
101 my ($class, $sock, $nntpd) = @_;
102 my $self = fields::new($class);
103 $self->SUPER::new($sock);
104 $self->{nntpd} = $nntpd;
105 res($self, '201 ' . $nntpd->{servername} . ' ready - post via email');
107 $self->watch_read(1);
108 update_idle_time($self);
109 $expt ||= PublicInbox::EvCleanup::later(*expire_old);
114 my ($cb, $argc) = @_;
115 my $tot = prototype $cb;
116 my ($nreq, undef) = split(';', $tot);
117 $nreq = ($nreq =~ tr/$//) - 1;
118 $tot = ($tot =~ tr/$//) - 1;
119 ($argc <= $tot && $argc >= $nreq);
122 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
123 sub process_line ($$) {
125 my ($req, @args) = split(/\s+/, $l);
126 return unless defined($req);
130 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
132 return res($self, '500 command not recognized') unless $req;
133 return res($self, r501) unless args_ok($req, scalar @args);
135 my $res = eval { $req->($self, @args) };
137 if ($err && !$self->{closed}) {
140 err($self, 'error from: %s (%s)', $l, $err);
141 $res = '503 program fault - command not performed';
143 return 0 unless defined $res;
148 my ($self, $arg) = @_;
150 return r501 unless $arg eq 'READER';
151 '201 Posting prohibited';
154 sub cmd_slave ($) { '202 slave status noted' }
156 sub cmd_xgtitle ($;$) {
157 my ($self, $wildmat) = @_;
158 more($self, '282 list of groups and descriptions follows');
159 list_newsgroups($self, $wildmat);
163 sub list_overview_fmt ($) {
165 do_more($self, $OVERVIEW_FMT);
168 sub list_headers ($;$) {
170 do_more($self, $LIST_HEADERS);
173 sub list_active ($;$) {
174 my ($self, $wildmat) = @_;
175 wildmat2re($wildmat);
176 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
177 $ng->{newsgroup} =~ $wildmat or next;
178 group_line($self, $ng);
182 sub list_active_times ($;$) {
183 my ($self, $wildmat) = @_;
184 wildmat2re($wildmat);
185 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
186 $ng->{newsgroup} =~ $wildmat or next;
187 my $c = eval { $ng->mm->created_at } || time;
188 more($self, "$ng->{newsgroup} $c $ng->{-primary_address}");
192 sub list_newsgroups ($;$) {
193 my ($self, $wildmat) = @_;
194 wildmat2re($wildmat);
195 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
196 $ng->{newsgroup} =~ $wildmat or next;
197 my $d = $ng->description;
198 more($self, "$ng->{newsgroup} $d");
202 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
203 sub cmd_list ($;$$) {
204 my ($self, @args) = @_;
206 my $arg = shift @args;
207 $arg =~ tr/A-Z./a-z_/;
209 return r501 if $DISABLED{$arg};
215 return r501 unless $arg && args_ok($arg, scalar @args);
216 more($self, '215 information follows');
217 $arg->($self, @args);
219 more($self, '215 list of newsgroups follows');
220 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
221 group_line($self, $ng);
227 sub cmd_listgroup ($;$) {
228 my ($self, $group) = @_;
229 if (defined $group) {
230 my $res = cmd_group($self, $group);
231 return $res if ($res !~ /\A211 /);
235 $self->{ng} or return '412 no newsgroup selected';
237 long_response($self, sub {
238 my $ary = $self->{ng}->mm->ids_after(\$n);
239 scalar @$ary or return;
240 more($self, join("\r\n", @$ary));
245 sub parse_time ($$;$) {
246 my ($date, $time, $gmt) = @_;
247 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
249 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt";
252 my @now = $gmt ? gmtime : localtime;
253 my ($YYYY, $MM, $DD);
254 if (length($date) == 8) { # RFC 3977 allows YYYYMMDD
255 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
256 } else { # legacy clients send YYMMDD
257 ($YYYY, $MM, $DD) = unpack('A2A2A2', $date);
258 my $cur_year = $now[5] + 1900;
259 if ($YYYY > $cur_year) {
260 $YYYY += int($cur_year / 1000) * 1000 - 100;
264 timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
266 timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
270 sub group_line ($$) {
271 my ($self, $ng) = @_;
272 my ($min, $max) = $ng->mm->minmax;
273 more($self, "$ng->{newsgroup} $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 '*');
297 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
299 my $key = sha1_hex($orig . $salt);
300 $orig =~ s/([^\w\-])+/\Q$1/g;
304 my %map = ('*' => '.*', '?' => '.' );
305 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
307 $tmp =~ s#([a-f0-9]{40})#
308 my $orig = $keep{$1};
309 defined $orig ? $orig : $1;
312 $_[0] = qr/\A$tmp\z/;
316 return $_[0] = qr/\A\z/ unless defined $_[0];
317 my %map = ('*' => '.*', ',' => '|');
318 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
319 $_[0] = qr/\A(?:$_[0])\z/;
322 sub cmd_newnews ($$$$;$$) {
323 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
324 my $ts = eval { parse_time($date, $time, $gmt) };
326 more($self, '230 list of new articles by message-id follows');
327 my ($keep, $skip) = split('!', $newsgroups, 2);
331 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
332 $ng->{newsgroup} =~ $keep or next;
333 $ng->{newsgroup} =~ $skip and next;
334 my $srch = $ng->search or next;
337 return '.' unless @srch;
340 long_response($self, sub {
342 my $msgs = $srch->query_ts($ts, $prev);
345 join(">\r\n<", map { $_->mid } @$msgs ).
347 $prev = $msgs->[-1]->{num};
350 if (@srch) { # continue onto next newsgroup
353 } else { # break out of the long response.
361 my ($self, $group) = @_;
362 my $no_such = '411 no such news group';
363 my $ng = $self->{nntpd}->{groups}->{$group} or return $no_such;
366 my ($min, $max) = $ng->mm->minmax;
369 $self->{article} = $min;
370 my $est_size = $max - $min;
371 "211 $est_size $min $max $group";
374 sub article_adj ($$) {
375 my ($self, $off) = @_;
376 my $ng = $self->{ng} or return '412 no newsgroup selected';
378 my $n = $self->{article};
379 defined $n or return '420 no current article has been selected';
382 my $mid = $ng->mm->mid_for($n);
384 $n = $off > 0 ? 'next' : 'previous';
385 return "421 no $n article in this group";
387 $self->{article} = $n;
388 "223 $n <$mid> article retrieved - request text separately";
391 sub cmd_next ($) { article_adj($_[0], 1) }
392 sub cmd_last ($) { article_adj($_[0], -1) }
394 # We want to encourage using email and CC-ing everybody involved to avoid
395 # the single-point-of-failure a single server provides.
398 my $ng = $self->{ng};
399 $ng ? "440 mailto:$ng->{-primary_address} to post"
400 : '440 posting not allowed'
405 res($self, '205 closing connection - goodbye!');
410 sub header_append ($$$) {
411 my ($hdr, $k, $v) = @_;
412 my @v = $hdr->header($k);
416 $hdr->header_set($k, @v, $v);
420 my ($self, $ng, $n, $mid) = @_;
421 my $ret = $self->{nntpd}->{servername} . " $ng->{newsgroup}:$n";
423 # num_for is pretty cheap and sometimes we'll lookup the existence
424 # of an article without getting even the OVER info. In other words,
425 # I'm not sure if its worth optimizing by scanning To:/Cc: and
426 # PublicInbox::ExtMsg on the PSGI end is just as expensive
427 foreach my $other (@{$self->{nntpd}->{grouplist}}) {
428 next if $ng eq $other;
429 my $num = eval { $other->mm->num_for($mid) } or next;
430 $ret .= " $other->{newsgroup}:$num";
435 sub set_nntp_headers ($$$$$) {
436 my ($self, $hdr, $ng, $n, $mid) = @_;
439 my $xref = xref($self, $ng, $n, $mid);
440 $hdr->header_set('Xref', $xref);
442 $hdr->header_set('Newsgroups', (split(/ /, $xref, 2))[1]);
443 header_append($hdr, 'List-Post', "<mailto:$ng->{-primary_address}>");
444 if (my $url = $ng->base_url) {
445 $mid = mid_escape($mid);
446 header_append($hdr, 'Archived-At', "<$url$mid/>");
447 header_append($hdr, 'List-Archive', "<$url>");
451 sub art_lookup ($$$) {
452 my ($self, $art, $set_headers) = @_;
453 my $ng = $self->{ng};
457 if ($art =~ /\A\d+\z/o) {
458 $err = '423 no such article number in this group';
461 } elsif ($art =~ /\A<([^>]+)>\z/) {
464 $n = $ng->mm->num_for($mid) if $ng;
465 goto found if defined $n;
466 foreach my $g (values %{$self->{nntpd}->{groups}}) {
467 $n = $g->mm->num_for($mid);
478 $err = '420 no current article has been selected';
479 $n = $self->{article};
480 defined $n or return $err;
482 $ng or return '412 no newsgroup has been selected';
483 $mid = $ng->mm->mid_for($n);
484 defined $mid or return $err;
487 my $smsg = $ng->search->{over_ro}->get_art($n) or return $err;
488 my $msg = $ng->msg_by_smsg($smsg) or return $err;
489 my $s = Email::Simple->new($msg);
491 set_nntp_headers($self, $s->header_obj, $ng, $n, $mid);
494 $s->body_set('') if ($set_headers == 2);
496 [ $n, $mid, $s, $smsg->bytes, $smsg->lines, $ng ];
499 sub simple_body_write ($$) {
503 $body =~ s/^\./../smg;
504 $body =~ s/(?<!\r)\n/\r\n/sg;
505 do_more($self, $body);
506 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
511 my ($self, $art) = @_;
512 $self->{article} = $art if defined $art && $art =~ /\A\d+\z/;
516 my $hdr = $_[0]->header_obj->as_string;
518 $hdr =~ s/(?<!\r)\n/\r\n/sg;
522 sub cmd_article ($;$) {
523 my ($self, $art) = @_;
524 my $r = art_lookup($self, $art, 1);
525 return $r unless ref $r;
526 my ($n, $mid, $s) = @$r;
527 set_art($self, $art);
528 more($self, "220 $n <$mid> article retrieved - head and body follow");
529 do_more($self, _header($s));
530 do_more($self, "\r\n");
531 simple_body_write($self, $s);
535 my ($self, $art) = @_;
536 my $r = art_lookup($self, $art, 2);
537 return $r unless ref $r;
538 my ($n, $mid, $s) = @$r;
539 set_art($self, $art);
540 more($self, "221 $n <$mid> article retrieved - head follows");
541 do_more($self, _header($s));
546 my ($self, $art) = @_;
547 my $r = art_lookup($self, $art, 0);
548 return $r unless ref $r;
549 my ($n, $mid, $s) = @$r;
550 set_art($self, $art);
551 more($self, "222 $n <$mid> article retrieved - body follows");
552 simple_body_write($self, $s);
556 my ($self, $art) = @_;
557 my $r = art_lookup($self, $art, 0);
558 return $r unless ref $r;
559 my ($n, $mid, undef) = @$r;
560 set_art($self, $art);
561 "223 $n <$mid> article retrieved - request text separately";
564 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
566 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
570 more($self, '100 help text follows');
575 my ($self, $range) = @_;
576 my $ng = $self->{ng} or return '412 no news group has been selected';
577 defined $range or return '420 No article(s) selected';
579 my ($min, $max) = $ng->mm->minmax;
580 if ($range =~ /\A(\d+)\z/) {
582 } elsif ($range =~ /\A(\d+)-\z/) {
583 ($beg, $end) = ($1, $max);
584 } elsif ($range =~ /\A(\d+)-(\d+)\z/) {
585 ($beg, $end) = ($1, $2);
589 $beg = $min if ($beg < $min);
590 $end = $max if ($end > $max);
591 return '420 No article(s) selected' if ($beg > $end);
595 sub long_response ($$) {
596 my ($self, $cb) = @_;
597 die "BUG: nested long response" if $self->{long_res};
599 my $fd = $self->{fd};
600 defined $fd or return;
601 # make sure we disable reading during a long response,
602 # clients should not be sending us stuff and making us do more
603 # work while we are stream a response to them
604 $self->watch_read(0);
606 $self->{long_res} = sub {
607 my $more = eval { $cb->() };
608 if ($@ || $self->{closed}) {
609 $self->{long_res} = undef;
613 "%s during long response[$fd] - %0.6f",
616 if ($self->{closed}) {
617 out($self, " deferred[$fd] aborted - %0.6f",
620 update_idle_time($self);
623 } elsif ($more) { # $self->{write_buf_size}:
624 # no recursion, schedule another call ASAP
625 # but only after all pending writes are done
626 update_idle_time($self);
629 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
631 $self->{long_res} = undef;
634 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
637 $self->{long_res}->(); # kick off!
641 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
642 my ($self, $xhdr, $range) = @_;
644 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
645 my ($ng, $n) = mid_lookup($self, $1);
646 return r430 unless $n;
647 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
648 } else { # numeric range
649 $range = $self->{article} unless defined $range;
650 my $r = get_range($self, $range);
651 return $r unless ref $r;
652 my $mm = $self->{ng}->mm;
653 my ($beg, $end) = @$r;
654 more($self, $xhdr ? r221 : r225);
655 long_response($self, sub {
656 my $r = $mm->msg_range(\$beg, $end);
658 more($self, join("\r\n", map {
666 sub mid_lookup ($$) {
667 my ($self, $mid) = @_;
668 my $self_ng = $self->{ng};
670 my $n = $self_ng->mm->num_for($mid);
671 return ($self_ng, $n) if defined $n;
673 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
674 next if defined $self_ng && $ng eq $self_ng;
675 my $n = $ng->mm->num_for($mid);
676 return ($ng, $n) if defined $n;
681 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
682 my ($self, $xhdr, $range) = @_;
684 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
686 my ($ng, $n) = mid_lookup($self, $mid);
687 return r430 unless $n;
688 hdr_mid_response($self, $xhdr, $ng, $n, $range,
689 xref($self, $ng, $n, $mid));
690 } else { # numeric range
691 $range = $self->{article} unless defined $range;
692 my $r = get_range($self, $range);
693 return $r unless ref $r;
694 my $ng = $self->{ng};
696 my ($beg, $end) = @$r;
697 more($self, $xhdr ? r221 : r225);
698 long_response($self, sub {
699 my $r = $mm->msg_range(\$beg, $end);
701 more($self, join("\r\n", map {
703 "$num ".xref($self, $ng, $num, $_->[1]);
710 sub search_header_for {
711 my ($srch, $num, $field) = @_;
712 my $smsg = $srch->{over_ro}->get_art($num) or return;
713 return PublicInbox::SearchMsg::date($smsg) if $field eq 'date';
717 sub hdr_searchmsg ($$$$) {
718 my ($self, $xhdr, $field, $range) = @_;
719 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
720 my ($ng, $n) = mid_lookup($self, $1);
721 return r430 unless defined $n;
722 my $v = search_header_for($ng->search, $n, $field);
723 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
724 } else { # numeric range
725 $range = $self->{article} unless defined $range;
726 my $srch = $self->{ng}->search;
727 my $mm = $self->{ng}->mm;
728 my $r = get_range($self, $range);
729 return $r unless ref $r;
730 my ($beg, $end) = @$r;
731 more($self, $xhdr ? r221 : r225);
733 long_response($self, sub {
734 my $msgs = $srch->query_xover($cur, $end);
735 my $nr = scalar @$msgs or return;
737 foreach my $s (@$msgs) {
738 $tmp .= $s->{num} . ' ' . $s->$field . "\r\n";
741 do_more($self, $tmp);
742 $cur = $msgs->[-1]->{num} + 1;
748 my ($self, $xhdr, $header, $range) = @_;
749 my $sub = lc $header;
750 if ($sub eq 'message-id') {
751 hdr_message_id($self, $xhdr, $range);
752 } elsif ($sub eq 'xref') {
753 hdr_xref($self, $xhdr, $range);
754 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
756 hdr_searchmsg($self, $xhdr, $sub, $range);
757 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
758 hdr_searchmsg($self, $xhdr, $1, $range);
760 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
766 my ($self, $header, $range) = @_;
767 do_hdr($self, 0, $header, $range);
771 sub cmd_xhdr ($$;$) {
772 my ($self, $header, $range) = @_;
773 do_hdr($self, 1, $header, $range);
776 sub hdr_mid_prefix ($$$$$) {
777 my ($self, $xhdr, $ng, $n, $mid) = @_;
778 return $mid if $xhdr;
780 # HDR for RFC 3977 users
781 if (my $self_ng = $self->{ng}) {
782 ($self_ng eq $ng) ? $n : '0';
788 sub hdr_mid_response ($$$$$$) {
789 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
792 $res .= r221 . "\r\n";
793 $res .= "$mid $v\r\n";
795 $res .= r225 . "\r\n";
796 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
797 $res .= "$pfx $v\r\n";
799 res($self, $res .= '.');
803 sub cmd_xrover ($;$) {
804 my ($self, $range) = @_;
805 my $ng = $self->{ng} or return '412 no newsgroup selected';
806 (defined $range && $range =~ /[<>]/) and
807 return '420 No article(s) selected'; # no message IDs
809 $range = $self->{article} unless defined $range;
810 my $r = get_range($self, $range);
811 return $r unless ref $r;
812 my ($beg, $end) = @$r;
814 my $srch = $ng->search;
815 more($self, '224 Overview information follows');
817 long_response($self, sub {
818 my $h = search_header_for($srch, $beg, 'references');
819 more($self, "$beg $h") if defined($h);
824 sub over_line ($$$$) {
825 my ($self, $ng, $num, $smsg) = @_;
826 # n.b. field access and procedural calls can be
827 # 10%-15% faster than OO method calls:
828 my $s = join("\t", $num,
831 PublicInbox::SearchMsg::date($smsg),
836 "Xref: " . xref($self, $ng, $num, $smsg->{mid}));
842 my ($self, $range) = @_;
843 if ($range && $range =~ /\A<(.+)>\z/) {
844 my ($ng, $n) = mid_lookup($self, $1);
845 defined $n or return r430;
846 my $smsg = $ng->search->{over_ro}->get_art($n) or return r430;
847 more($self, '224 Overview information follows (multi-line)');
849 # Only set article number column if it's the current group
850 my $self_ng = $self->{ng};
851 $n = 0 if (!$self_ng || $self_ng ne $ng);
852 more($self, over_line($self, $ng, $n, $smsg));
855 cmd_xover($self, $range);
859 sub cmd_xover ($;$) {
860 my ($self, $range) = @_;
861 $range = $self->{article} unless defined $range;
862 my $r = get_range($self, $range);
863 return $r unless ref $r;
864 my ($beg, $end) = @$r;
865 more($self, "224 Overview information follows for $beg to $end");
866 my $srch = $self->{ng}->search;
868 long_response($self, sub {
869 my $msgs = $srch->query_xover($cur, $end);
870 my $nr = scalar @$msgs or return;
873 more($self, join("\r\n", map {
874 over_line($self, $self->{ng}, $_->{num}, $_);
876 $cur = $msgs->[-1]->{num} + 1;
881 my ($self, $mid) = @_;
882 return r501 unless $mid =~ /\A<(.+)>\z/;
885 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
886 my $n = $ng->mm->num_for($mid);
887 push @paths, "$ng->{newsgroup}/$n" if defined $n;
889 return '430 no such article on server' unless @paths;
890 '223 '.join(' ', @paths);
894 my ($self, $line) = @_;
895 do_write($self, $line . "\r\n");
899 my ($self, $line) = @_;
900 do_more($self, $line . "\r\n");
904 my ($self, $data) = @_;
905 my $done = $self->write($data);
906 return 0 if $self->{closed};
908 # Do not watch for readability if we have data in the queue,
909 # instead re-enable watching for readability when we can
910 $self->watch_read(0) if (!$done || $self->{long_res});
916 my ($self, $fmt, @args) = @_;
917 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
921 my ($self, $fmt, @args) = @_;
922 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
925 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
928 my ($self, $data) = @_;
929 if (MSG_MORE && !$self->{write_buf_size}) {
930 my $n = send($self->{sock}, $data, MSG_MORE);
932 my $dlen = length($data);
933 return 1 if $n == $dlen; # all done!
934 $data = substr($data, $n, $dlen - $n);
937 do_write($self, $data);
940 # callbacks for Danga::Socket
942 sub event_hup { $_[0]->close }
943 sub event_err { $_[0]->close }
947 update_idle_time($self);
948 # only continue watching for readability when we are done writing:
949 if ($self->write(undef) == 1 && !$self->{long_res}) {
950 $self->watch_read(1);
956 use constant LINE_MAX => 512; # RFC 977 section 2.3
958 if (index($self->{rbuf}, "\n") < 0) {
959 my $buf = $self->read(LINE_MAX) or return $self->close;
960 $self->{rbuf} .= $$buf;
963 while ($r > 0 && $self->{rbuf} =~ s/\A\s*([^\r\n]*)\r?\n//) {
965 return $self->close if $line =~ /[[:cntrl:]]/s;
967 my $fd = $self->{fd};
968 $r = eval { process_line($self, $line) };
969 my $d = $self->{long_res} ?
970 " deferred[$fd]" : '';
971 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
974 return $self->close if $r < 0;
975 my $len = length($self->{rbuf});
976 return $self->close if ($len >= LINE_MAX);
977 update_idle_time($self);
982 if (index($self->{rbuf}, "\n") >= 0) {
983 # Force another read if there is a pipelined request.
984 # We don't know if the socket has anything for us to read,
985 # and we must double-check again by the time the timer fires
986 # in case we really did dispatch a read event and started
987 # another long response.
989 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
991 # no pipelined requests available, let the kernel know
992 # to wake us up if there's more
993 $self->watch_read(1); # Danga::Socket::watch_read
997 sub not_idle_long ($$) {
998 my ($self, $now) = @_;
999 defined(my $fd = $self->{fd}) or return;
1000 my $ary = $EXPMAP->{$fd} or return;
1001 my $exp_at = $ary->[0] + $EXPTIME;
1005 # for graceful shutdown in PublicInbox::Daemon:
1007 my ($self, $now) = @_;
1008 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size} ||
1009 not_idle_long($self, $now));