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(PublicInbox::DS);
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',
28 sub now () { clock_gettime(CLOCK_MONOTONIC) };
30 my @OVERVIEW = qw(Subject From Date Message-ID References Xref);
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 my %DISABLED; # = map { $_ => 1 } qw(xover list_overview_fmt newnews xhdr);
38 my $EXPMAP; # fd -> [ idle_time, $self ]
40 our $EXPTIME = 180; # 3 minutes
48 foreach my $nntp (@$q) {
49 # for request && response protocols, always finish writing
50 # before finishing reading:
51 if (my $long_cb = $nntp->{long_res}) {
52 $nntp->write($long_cb);
54 # pipelined request, we bypassed socket-readiness
58 # maybe there's more pipelined data, or we'll have
59 # to register it for socket-readiness notifications
60 if (!$nntp->{long_res} && !$nntp->{closed}) {
67 sub update_idle_time ($) {
70 defined $fd and $EXPMAP->{$fd} = [ now(), $self ];
76 my $old = $now - $exp;
79 while (my ($fd, $v) = each %$EXPMAP) {
80 my ($idle_time, $nntp) = @$v;
81 if ($idle_time < $old) {
82 $nntp->close; # idempotent
90 $expt = PublicInbox::EvCleanup::later(*expire_old);
93 # noop to kick outselves out of the loop ASAP so descriptors
95 PublicInbox::EvCleanup::asap(sub {});
100 my ($class, $sock, $nntpd) = @_;
101 my $self = fields::new($class);
102 $self->SUPER::new($sock);
103 $self->{nntpd} = $nntpd;
104 res($self, '201 ' . $nntpd->{servername} . ' ready - post via email');
106 $self->watch_read(1);
107 update_idle_time($self);
108 $expt ||= PublicInbox::EvCleanup::later(*expire_old);
113 my ($cb, $argc) = @_;
114 my $tot = prototype $cb;
115 my ($nreq, undef) = split(';', $tot);
116 $nreq = ($nreq =~ tr/$//) - 1;
117 $tot = ($tot =~ tr/$//) - 1;
118 ($argc <= $tot && $argc >= $nreq);
121 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
122 sub process_line ($$) {
124 my ($req, @args) = split(/[ \t]/, $l);
125 return 1 unless defined($req); # skip blank line
129 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
131 return res($self, '500 command not recognized') unless $req;
132 return res($self, r501) unless args_ok($req, scalar @args);
134 my $res = eval { $req->($self, @args) };
136 if ($err && !$self->{closed}) {
139 err($self, 'error from: %s (%s)', $l, $err);
140 $res = '503 program fault - command not performed';
142 return 0 unless defined $res;
147 my ($self, $arg) = @_;
149 return r501 unless $arg eq 'READER';
150 '201 Posting prohibited';
153 sub cmd_slave ($) { '202 slave status noted' }
155 sub cmd_xgtitle ($;$) {
156 my ($self, $wildmat) = @_;
157 more($self, '282 list of groups and descriptions follows');
158 list_newsgroups($self, $wildmat);
162 sub list_overview_fmt ($) {
164 do_more($self, $OVERVIEW_FMT);
167 sub list_headers ($;$) {
169 do_more($self, $LIST_HEADERS);
172 sub list_active ($;$) {
173 my ($self, $wildmat) = @_;
174 wildmat2re($wildmat);
175 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
176 $ng->{newsgroup} =~ $wildmat or next;
177 group_line($self, $ng);
181 sub list_active_times ($;$) {
182 my ($self, $wildmat) = @_;
183 wildmat2re($wildmat);
184 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
185 $ng->{newsgroup} =~ $wildmat or next;
186 my $c = eval { $ng->mm->created_at } || time;
187 more($self, "$ng->{newsgroup} $c $ng->{-primary_address}");
191 sub list_newsgroups ($;$) {
192 my ($self, $wildmat) = @_;
193 wildmat2re($wildmat);
194 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
195 $ng->{newsgroup} =~ $wildmat or next;
196 my $d = $ng->description;
197 more($self, "$ng->{newsgroup} $d");
201 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
202 sub cmd_list ($;$$) {
203 my ($self, @args) = @_;
205 my $arg = shift @args;
206 $arg =~ tr/A-Z./a-z_/;
208 return r501 if $DISABLED{$arg};
214 return r501 unless $arg && args_ok($arg, scalar @args);
215 more($self, '215 information follows');
216 $arg->($self, @args);
218 more($self, '215 list of newsgroups follows');
219 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
220 group_line($self, $ng);
226 sub cmd_listgroup ($;$) {
227 my ($self, $group) = @_;
228 if (defined $group) {
229 my $res = cmd_group($self, $group);
230 return $res if ($res !~ /\A211 /);
234 $self->{ng} or return '412 no newsgroup selected';
236 long_response($self, sub {
237 my $ary = $self->{ng}->mm->ids_after(\$n);
238 scalar @$ary or return;
239 more($self, join("\r\n", @$ary));
244 sub parse_time ($$;$) {
245 my ($date, $time, $gmt) = @_;
246 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
248 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt";
251 my @now = $gmt ? gmtime : localtime;
252 my ($YYYY, $MM, $DD);
253 if (length($date) == 8) { # RFC 3977 allows YYYYMMDD
254 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
255 } else { # legacy clients send YYMMDD
256 ($YYYY, $MM, $DD) = unpack('A2A2A2', $date);
257 my $cur_year = $now[5] + 1900;
258 if ($YYYY > $cur_year) {
259 $YYYY += int($cur_year / 1000) * 1000 - 100;
263 timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
265 timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
269 sub group_line ($$) {
270 my ($self, $ng) = @_;
271 my ($min, $max) = $ng->mm->minmax;
272 more($self, "$ng->{newsgroup} $max $min n") if defined $min && defined $max;
275 sub cmd_newgroups ($$$;$$) {
276 my ($self, $date, $time, $gmt, $dists) = @_;
277 my $ts = eval { parse_time($date, $time, $gmt) };
281 more($self, '231 list of new newsgroups follows');
282 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
283 my $c = eval { $ng->mm->created_at } || 0;
284 next unless $c > $ts;
285 group_line($self, $ng);
290 sub wildmat2re (;$) {
291 return $_[0] = qr/.*/ if (!defined $_[0] || $_[0] eq '*');
296 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
298 my $key = sha1_hex($orig . $salt);
299 $orig =~ s/([^\w\-])+/\Q$1/g;
303 my %map = ('*' => '.*', '?' => '.' );
304 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
306 $tmp =~ s#([a-f0-9]{40})#
307 my $orig = $keep{$1};
308 defined $orig ? $orig : $1;
311 $_[0] = qr/\A$tmp\z/;
315 return $_[0] = qr/\A\z/ unless defined $_[0];
316 my %map = ('*' => '.*', ',' => '|');
317 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
318 $_[0] = qr/\A(?:$_[0])\z/;
321 sub cmd_newnews ($$$$;$$) {
322 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
323 my $ts = eval { parse_time($date, $time, $gmt) };
325 more($self, '230 list of new articles by message-id follows');
326 my ($keep, $skip) = split('!', $newsgroups, 2);
330 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
331 $ng->{newsgroup} =~ $keep or next;
332 $ng->{newsgroup} =~ $skip and next;
333 my $over = $ng->over or next;
336 return '.' unless @over;
339 long_response($self, sub {
341 my $msgs = $over->query_ts($ts, $prev);
344 join(">\r\n<", map { $_->mid } @$msgs ).
346 $prev = $msgs->[-1]->{num};
349 if (@over) { # continue onto next newsgroup
352 } else { # break out of the long response.
360 my ($self, $group) = @_;
361 my $no_such = '411 no such news group';
362 my $ng = $self->{nntpd}->{groups}->{$group} or return $no_such;
365 my ($min, $max) = $ng->mm->minmax;
368 $self->{article} = $min;
369 my $est_size = $max - $min;
370 "211 $est_size $min $max $group";
373 sub article_adj ($$) {
374 my ($self, $off) = @_;
375 my $ng = $self->{ng} or return '412 no newsgroup selected';
377 my $n = $self->{article};
378 defined $n or return '420 no current article has been selected';
381 my $mid = $ng->mm->mid_for($n);
383 $n = $off > 0 ? 'next' : 'previous';
384 return "421 no $n article in this group";
386 $self->{article} = $n;
387 "223 $n <$mid> article retrieved - request text separately";
390 sub cmd_next ($) { article_adj($_[0], 1) }
391 sub cmd_last ($) { article_adj($_[0], -1) }
393 # We want to encourage using email and CC-ing everybody involved to avoid
394 # the single-point-of-failure a single server provides.
397 my $ng = $self->{ng};
398 $ng ? "440 mailto:$ng->{-primary_address} to post"
399 : '440 posting not allowed'
404 res($self, '205 closing connection - goodbye!');
409 sub header_append ($$$) {
410 my ($hdr, $k, $v) = @_;
411 my @v = $hdr->header($k);
415 $hdr->header_set($k, @v, $v);
419 my ($self, $ng, $n, $mid) = @_;
420 my $ret = $self->{nntpd}->{servername} . " $ng->{newsgroup}:$n";
422 # num_for is pretty cheap and sometimes we'll lookup the existence
423 # of an article without getting even the OVER info. In other words,
424 # I'm not sure if its worth optimizing by scanning To:/Cc: and
425 # PublicInbox::ExtMsg on the PSGI end is just as expensive
426 foreach my $other (@{$self->{nntpd}->{grouplist}}) {
427 next if $ng eq $other;
428 my $num = eval { $other->mm->num_for($mid) } or next;
429 $ret .= " $other->{newsgroup}:$num";
434 sub set_nntp_headers ($$$$$) {
435 my ($self, $hdr, $ng, $n, $mid) = @_;
437 # why? leafnode requires a Path: header for some inexplicable
438 # reason. We'll fake the shortest one possible.
439 $hdr->header_set('Path', 'y');
442 my $xref = xref($self, $ng, $n, $mid);
443 $hdr->header_set('Xref', $xref);
444 $xref =~ s/:[0-9]+//g;
445 $hdr->header_set('Newsgroups', (split(/ /, $xref, 2))[1]);
446 header_append($hdr, 'List-Post', "<mailto:$ng->{-primary_address}>");
447 if (my $url = $ng->base_url) {
448 $mid = mid_escape($mid);
449 header_append($hdr, 'Archived-At', "<$url$mid/>");
450 header_append($hdr, 'List-Archive', "<$url>");
454 sub art_lookup ($$$) {
455 my ($self, $art, $set_headers) = @_;
456 my $ng = $self->{ng};
460 if ($art =~ /\A[0-9]+\z/) {
461 $err = '423 no such article number in this group';
464 } elsif ($art =~ /\A<([^>]+)>\z/) {
467 $n = $ng->mm->num_for($mid) if $ng;
468 goto found if defined $n;
469 foreach my $g (values %{$self->{nntpd}->{groups}}) {
470 $n = $g->mm->num_for($mid);
481 $err = '420 no current article has been selected';
482 $n = $self->{article};
483 defined $n or return $err;
485 $ng or return '412 no newsgroup has been selected';
486 $mid = $ng->mm->mid_for($n);
487 defined $mid or return $err;
490 my $smsg = $ng->over->get_art($n) or return $err;
491 my $msg = $ng->msg_by_smsg($smsg) or return $err;
492 my $s = Email::Simple->new($msg);
494 set_nntp_headers($self, $s->header_obj, $ng, $n, $mid);
497 $s->body_set('') if ($set_headers == 2);
499 [ $n, $mid, $s, $smsg->bytes, $smsg->lines, $ng ];
502 sub simple_body_write ($$) {
506 $body =~ s/^\./../smg;
507 $body =~ s/(?<!\r)\n/\r\n/sg;
508 do_more($self, $body);
509 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
514 my ($self, $art) = @_;
515 $self->{article} = $art if defined $art && $art =~ /\A[0-9]+\z/;
519 my $hdr = $_[0]->header_obj->as_string;
521 $hdr =~ s/(?<!\r)\n/\r\n/sg;
525 sub cmd_article ($;$) {
526 my ($self, $art) = @_;
527 my $r = art_lookup($self, $art, 1);
528 return $r unless ref $r;
529 my ($n, $mid, $s) = @$r;
530 set_art($self, $art);
531 more($self, "220 $n <$mid> article retrieved - head and body follow");
532 do_more($self, _header($s));
533 do_more($self, "\r\n");
534 simple_body_write($self, $s);
538 my ($self, $art) = @_;
539 my $r = art_lookup($self, $art, 2);
540 return $r unless ref $r;
541 my ($n, $mid, $s) = @$r;
542 set_art($self, $art);
543 more($self, "221 $n <$mid> article retrieved - head follows");
544 do_more($self, _header($s));
549 my ($self, $art) = @_;
550 my $r = art_lookup($self, $art, 0);
551 return $r unless ref $r;
552 my ($n, $mid, $s) = @$r;
553 set_art($self, $art);
554 more($self, "222 $n <$mid> article retrieved - body follows");
555 simple_body_write($self, $s);
559 my ($self, $art) = @_;
560 my $r = art_lookup($self, $art, 0);
561 return $r unless ref $r;
562 my ($n, $mid, undef) = @$r;
563 set_art($self, $art);
564 "223 $n <$mid> article retrieved - request text separately";
567 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
569 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
573 more($self, '100 help text follows');
578 my ($self, $range) = @_;
579 my $ng = $self->{ng} or return '412 no news group has been selected';
580 defined $range or return '420 No article(s) selected';
582 my ($min, $max) = $ng->mm->minmax;
583 if ($range =~ /\A([0-9]+)\z/) {
585 } elsif ($range =~ /\A([0-9]+)-\z/) {
586 ($beg, $end) = ($1, $max);
587 } elsif ($range =~ /\A([0-9]+)-([0-9]+)\z/) {
588 ($beg, $end) = ($1, $2);
592 $beg = $min if ($beg < $min);
593 $end = $max if ($end > $max);
594 return '420 No article(s) selected' if ($beg > $end);
598 sub long_response ($$) {
599 my ($self, $cb) = @_;
600 die "BUG: nested long response" if $self->{long_res};
602 my $fd = $self->{fd};
603 defined $fd or return;
604 # make sure we disable reading during a long response,
605 # clients should not be sending us stuff and making us do more
606 # work while we are stream a response to them
607 $self->watch_read(0);
609 $self->{long_res} = sub {
610 my $more = eval { $cb->() };
611 if ($@ || $self->{closed}) {
612 $self->{long_res} = undef;
616 "%s during long response[$fd] - %0.6f",
619 if ($self->{closed}) {
620 out($self, " deferred[$fd] aborted - %0.6f",
623 update_idle_time($self);
626 } elsif ($more) { # $self->{write_buf_size}:
627 # no recursion, schedule another call ASAP
628 # but only after all pending writes are done
629 update_idle_time($self);
632 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
634 $self->{long_res} = undef;
637 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
640 $self->{long_res}->(); # kick off!
644 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
645 my ($self, $xhdr, $range) = @_;
647 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
648 my ($ng, $n) = mid_lookup($self, $1);
649 return r430 unless $n;
650 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
651 } else { # numeric range
652 $range = $self->{article} unless defined $range;
653 my $r = get_range($self, $range);
654 return $r unless ref $r;
655 my $mm = $self->{ng}->mm;
656 my ($beg, $end) = @$r;
657 more($self, $xhdr ? r221 : r225);
658 long_response($self, sub {
659 my $r = $mm->msg_range(\$beg, $end);
661 more($self, join("\r\n", map {
669 sub mid_lookup ($$) {
670 my ($self, $mid) = @_;
671 my $self_ng = $self->{ng};
673 my $n = $self_ng->mm->num_for($mid);
674 return ($self_ng, $n) if defined $n;
676 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
677 next if defined $self_ng && $ng eq $self_ng;
678 my $n = $ng->mm->num_for($mid);
679 return ($ng, $n) if defined $n;
684 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
685 my ($self, $xhdr, $range) = @_;
687 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
689 my ($ng, $n) = mid_lookup($self, $mid);
690 return r430 unless $n;
691 hdr_mid_response($self, $xhdr, $ng, $n, $range,
692 xref($self, $ng, $n, $mid));
693 } else { # numeric range
694 $range = $self->{article} unless defined $range;
695 my $r = get_range($self, $range);
696 return $r unless ref $r;
697 my $ng = $self->{ng};
699 my ($beg, $end) = @$r;
700 more($self, $xhdr ? r221 : r225);
701 long_response($self, sub {
702 my $r = $mm->msg_range(\$beg, $end);
704 more($self, join("\r\n", map {
706 "$num ".xref($self, $ng, $num, $_->[1]);
713 sub over_header_for {
714 my ($over, $num, $field) = @_;
715 my $smsg = $over->get_art($num) or return;
716 return PublicInbox::SearchMsg::date($smsg) if $field eq 'date';
720 sub hdr_searchmsg ($$$$) {
721 my ($self, $xhdr, $field, $range) = @_;
722 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
723 my ($ng, $n) = mid_lookup($self, $1);
724 return r430 unless defined $n;
725 my $v = over_header_for($ng->over, $n, $field);
726 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
727 } else { # numeric range
728 $range = $self->{article} unless defined $range;
729 my $over = $self->{ng}->over;
730 my $mm = $self->{ng}->mm;
731 my $r = get_range($self, $range);
732 return $r unless ref $r;
733 my ($beg, $end) = @$r;
734 more($self, $xhdr ? r221 : r225);
736 long_response($self, sub {
737 my $msgs = $over->query_xover($cur, $end);
738 my $nr = scalar @$msgs or return;
740 foreach my $s (@$msgs) {
741 $tmp .= $s->{num} . ' ' . $s->$field . "\r\n";
744 do_more($self, $tmp);
745 $cur = $msgs->[-1]->{num} + 1;
751 my ($self, $xhdr, $header, $range) = @_;
752 my $sub = lc $header;
753 if ($sub eq 'message-id') {
754 hdr_message_id($self, $xhdr, $range);
755 } elsif ($sub eq 'xref') {
756 hdr_xref($self, $xhdr, $range);
757 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
759 hdr_searchmsg($self, $xhdr, $sub, $range);
760 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
761 hdr_searchmsg($self, $xhdr, $1, $range);
763 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
769 my ($self, $header, $range) = @_;
770 do_hdr($self, 0, $header, $range);
774 sub cmd_xhdr ($$;$) {
775 my ($self, $header, $range) = @_;
776 do_hdr($self, 1, $header, $range);
779 sub hdr_mid_prefix ($$$$$) {
780 my ($self, $xhdr, $ng, $n, $mid) = @_;
781 return $mid if $xhdr;
783 # HDR for RFC 3977 users
784 if (my $self_ng = $self->{ng}) {
785 ($self_ng eq $ng) ? $n : '0';
791 sub hdr_mid_response ($$$$$$) {
792 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
795 $res .= r221 . "\r\n";
796 $res .= "$mid $v\r\n";
798 $res .= r225 . "\r\n";
799 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
800 $res .= "$pfx $v\r\n";
802 res($self, $res .= '.');
806 sub cmd_xrover ($;$) {
807 my ($self, $range) = @_;
808 my $ng = $self->{ng} or return '412 no newsgroup selected';
809 (defined $range && $range =~ /[<>]/) and
810 return '420 No article(s) selected'; # no message IDs
812 $range = $self->{article} unless defined $range;
813 my $r = get_range($self, $range);
814 return $r unless ref $r;
815 my ($beg, $end) = @$r;
817 my $over = $ng->over;
818 more($self, '224 Overview information follows');
820 long_response($self, sub {
821 my $h = over_header_for($over, $beg, 'references');
822 more($self, "$beg $h") if defined($h);
827 sub over_line ($$$$) {
828 my ($self, $ng, $num, $smsg) = @_;
829 # n.b. field access and procedural calls can be
830 # 10%-15% faster than OO method calls:
831 my $s = join("\t", $num,
834 PublicInbox::SearchMsg::date($smsg),
839 "Xref: " . xref($self, $ng, $num, $smsg->{mid}));
845 my ($self, $range) = @_;
846 if ($range && $range =~ /\A<(.+)>\z/) {
847 my ($ng, $n) = mid_lookup($self, $1);
848 defined $n or return r430;
849 my $smsg = $ng->over->get_art($n) or return r430;
850 more($self, '224 Overview information follows (multi-line)');
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($self, $ng, $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 $over = $self->{ng}->over;
871 long_response($self, sub {
872 my $msgs = $over->query_xover($cur, $end);
873 my $nr = scalar @$msgs or return;
876 more($self, join("\r\n", map {
877 over_line($self, $self->{ng}, $_->{num}, $_);
879 $cur = $msgs->[-1]->{num} + 1;
884 my ($self, $mid) = @_;
885 return r501 unless $mid =~ /\A<(.+)>\z/;
888 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
889 my $n = $ng->mm->num_for($mid);
890 push @paths, "$ng->{newsgroup}/$n" if defined $n;
892 return '430 no such article on server' unless @paths;
893 '223 '.join(' ', @paths);
897 my ($self, $line) = @_;
898 do_write($self, $line . "\r\n");
902 my ($self, $line) = @_;
903 do_more($self, $line . "\r\n");
907 my ($self, $data) = @_;
908 my $done = $self->write($data);
909 return 0 if $self->{closed};
911 # Do not watch for readability if we have data in the queue,
912 # instead re-enable watching for readability when we can
913 $self->watch_read(0) if (!$done || $self->{long_res});
919 my ($self, $fmt, @args) = @_;
920 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
924 my ($self, $fmt, @args) = @_;
925 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
928 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
931 my ($self, $data) = @_;
932 if (MSG_MORE && !$self->{write_buf_size}) {
933 my $n = send($self->{sock}, $data, MSG_MORE);
935 my $dlen = length($data);
936 return 1 if $n == $dlen; # all done!
937 $data = substr($data, $n, $dlen - $n);
940 do_write($self, $data);
943 # callbacks for PublicInbox::DS
945 sub event_hup { $_[0]->close }
946 sub event_err { $_[0]->close }
950 update_idle_time($self);
951 # only continue watching for readability when we are done writing:
952 if ($self->write(undef) == 1 && !$self->{long_res}) {
953 $self->watch_read(1);
959 use constant LINE_MAX => 512; # RFC 977 section 2.3
961 if (index($self->{rbuf}, "\n") < 0) {
962 my $buf = $self->read(LINE_MAX) or return $self->close;
963 $self->{rbuf} .= $$buf;
966 while ($r > 0 && $self->{rbuf} =~ s/\A[ \t\r\n]*([^\r\n]*)\r?\n//) {
968 return $self->close if $line =~ /[[:cntrl:]]/s;
970 my $fd = $self->{fd};
971 $r = eval { process_line($self, $line) };
972 my $d = $self->{long_res} ?
973 " deferred[$fd]" : '';
974 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
977 return $self->close if $r < 0;
978 my $len = length($self->{rbuf});
979 return $self->close if ($len >= LINE_MAX);
980 update_idle_time($self);
985 if (index($self->{rbuf}, "\n") >= 0) {
986 # Force another read if there is a pipelined request.
987 # We don't know if the socket has anything for us to read,
988 # and we must double-check again by the time the timer fires
989 # in case we really did dispatch a read event and started
990 # another long response.
992 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
994 # no pipelined requests available, let the kernel know
995 # to wake us up if there's more
996 $self->watch_read(1); # PublicInbox::DS::watch_read
1000 sub not_idle_long ($$) {
1001 my ($self, $now) = @_;
1002 defined(my $fd = $self->{fd}) or return;
1003 my $ary = $EXPMAP->{$fd} or return;
1004 my $exp_at = $ary->[0] + $EXPTIME;
1008 # for graceful shutdown in PublicInbox::Daemon:
1010 my ($self, $now) = @_;
1011 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size} ||
1012 not_idle_long($self, $now));