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 require PublicInbox::EvCleanup;
15 use POSIX qw(strftime);
16 use Time::HiRes qw(clock_gettime CLOCK_MONOTONIC);
17 use URI::Escape qw(uri_escape_utf8);
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 & $nntp->{event_watch}) {
61 sub update_idle_time ($) {
64 defined $fd and $EXPMAP->{$fd} = [ now(), $self ];
67 # reduce FD pressure by closing some "git cat-file --batch" processes
68 # and unused FDs for msgmap and Xapian indices
69 sub weaken_groups () {
71 foreach my $nntpd (values %$WEAKEN) {
72 $_->weaken_all foreach (@{$nntpd->{grouplist}});
80 my $old = $now - $exp;
83 while (my ($fd, $v) = each %$EXPMAP) {
84 my ($idle_time, $nntp) = @$v;
85 if ($idle_time < $old) {
86 $nntp->close; # idempotent
94 $expt = PublicInbox::EvCleanup::later(*expire_old);
98 # noop to kick outselves out of the loop ASAP so descriptors
100 PublicInbox::EvCleanup::asap(sub {});
102 # grace period for reaping resources
103 $weakt ||= PublicInbox::EvCleanup::later(*weaken_groups);
108 my ($class, $sock, $nntpd) = @_;
109 my $self = fields::new($class);
110 $self->SUPER::new($sock);
111 $self->{nntpd} = $nntpd;
112 res($self, '201 server ready - post via email');
114 $self->watch_read(1);
115 update_idle_time($self);
116 $WEAKEN->{"$nntpd"} = $nntpd;
117 $expt ||= PublicInbox::EvCleanup::later(*expire_old);
122 my ($cb, $argc) = @_;
123 my $tot = prototype $cb;
124 my ($nreq, undef) = split(';', $tot);
125 $nreq = ($nreq =~ tr/$//) - 1;
126 $tot = ($tot =~ tr/$//) - 1;
127 ($argc <= $tot && $argc >= $nreq);
130 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
131 sub process_line ($$) {
133 my ($req, @args) = split(/\s+/, $l);
137 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
139 return res($self, '500 command not recognized') unless $req;
140 return res($self, r501) unless args_ok($req, scalar @args);
142 my $res = eval { $req->($self, @args) };
144 if ($err && !$self->{closed}) {
146 err($self, 'error from: %s (%s)', $l, $err);
147 $res = '503 program fault - command not performed';
149 return 0 unless defined $res;
154 my ($self, $arg) = @_;
156 return r501 unless $arg eq 'READER';
157 '201 Posting prohibited';
160 sub cmd_slave ($) { '202 slave status noted' }
162 sub cmd_xgtitle ($;$) {
163 my ($self, $wildmat) = @_;
164 more($self, '282 list of groups and descriptions follows');
165 list_newsgroups($self, $wildmat);
169 sub list_overview_fmt ($) {
171 do_more($self, $OVERVIEW_FMT);
174 sub list_headers ($;$) {
176 do_more($self, $LIST_HEADERS);
179 sub list_active ($;$) {
180 my ($self, $wildmat) = @_;
181 wildmat2re($wildmat);
182 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
183 $ng->{newsgroup} =~ $wildmat or next;
184 group_line($self, $ng);
188 sub list_active_times ($;$) {
189 my ($self, $wildmat) = @_;
190 wildmat2re($wildmat);
191 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
192 $ng->{newsgroup} =~ $wildmat or next;
193 my $c = eval { $ng->mm->created_at } || time;
194 more($self, "$ng->{newsgroup} $c $ng->{-primary_address}");
198 sub list_newsgroups ($;$) {
199 my ($self, $wildmat) = @_;
200 wildmat2re($wildmat);
201 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
202 $ng->{newsgroup} =~ $wildmat or next;
203 my $d = $ng->description;
204 more($self, "$ng->{newsgroup} $d");
208 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
209 sub cmd_list ($;$$) {
210 my ($self, @args) = @_;
212 my $arg = shift @args;
213 $arg =~ tr/A-Z./a-z_/;
215 return r501 if $DISABLED{$arg};
221 return r501 unless $arg && args_ok($arg, scalar @args);
222 more($self, '215 information follows');
223 $arg->($self, @args);
225 more($self, '215 list of newsgroups follows');
226 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
227 group_line($self, $ng);
233 sub cmd_listgroup ($;$) {
234 my ($self, $group) = @_;
235 if (defined $group) {
236 my $res = cmd_group($self, $group);
237 return $res if ($res !~ /\A211 /);
241 $self->{ng} or return '412 no newsgroup selected';
242 long_response($self, 0, long_response_limit, sub {
244 my $nr = $self->{ng}->mm->id_batch($$i, sub {
246 more($self, join("\r\n", @$ary));
249 # -1 to adjust for implicit increment in long_response
250 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
254 sub parse_time ($$;$) {
255 my ($date, $time, $gmt) = @_;
256 use Time::Local qw();
257 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
259 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt";
262 my @now = $gmt ? gmtime : localtime;
263 my ($YYYY, $MM, $DD);
264 if (length($date) == 8) { # RFC 3977 allows YYYYMMDD
265 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
266 } else { # legacy clients send YYMMDD
267 ($YYYY, $MM, $DD) = unpack('A2A2A2', $date);
268 if ($YYYY > strftime('%y', @now)) {
269 my $cur_year = $now[5] + 1900;
270 $YYYY += int($cur_year / 1000) * 1000 - 100;
274 Time::Local::timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
276 Time::Local::timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
280 sub group_line ($$) {
281 my ($self, $ng) = @_;
282 my ($min, $max) = $ng->mm->minmax;
283 more($self, "$ng->{newsgroup} $max $min n") if defined $min && defined $max;
286 sub cmd_newgroups ($$$;$$) {
287 my ($self, $date, $time, $gmt, $dists) = @_;
288 my $ts = eval { parse_time($date, $time, $gmt) };
292 more($self, '231 list of new newsgroups follows');
293 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
294 my $c = eval { $ng->mm->created_at } || 0;
295 next unless $c > $ts;
296 group_line($self, $ng);
301 sub wildmat2re (;$) {
302 return $_[0] = qr/.*/ if (!defined $_[0] || $_[0] eq '*');
305 use Digest::SHA qw(sha1_hex);
308 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
310 my $key = sha1_hex($orig . $salt);
311 $orig =~ s/([^\w\-])+/\Q$1/g;
315 my %map = ('*' => '.*', '?' => '.' );
316 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
318 $tmp =~ s#([a-f0-9]{40})#
319 my $orig = $keep{$1};
320 defined $orig ? $orig : $1;
323 $_[0] = qr/\A$tmp\z/;
327 return $_[0] = qr/\A\z/ unless defined $_[0];
328 my %map = ('*' => '.*', ',' => '|');
329 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
330 $_[0] = qr/\A(?:$_[0])\z/;
333 sub cmd_newnews ($$$$;$$) {
334 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
335 my $ts = eval { parse_time($date, $time, $gmt) };
337 more($self, '230 list of new articles by message-id follows');
338 my ($keep, $skip) = split('!', $newsgroups, 2);
342 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
343 $ng->{newsgroup} =~ $keep or next;
344 $ng->{newsgroup} =~ $skip and next;
345 my $srch = $ng->search or next;
348 return '.' unless @srch;
351 my $opts = { asc => 1, limit => 1000, offset => 0 };
352 long_response($self, 0, long_response_limit, sub {
355 my $res = $srch->query($ts, $opts);
356 my $msgs = $res->{msgs};
357 if (my $nr = scalar @$msgs) {
359 join(">\r\n<", map { $_->mid } @$msgs ).
361 $opts->{offset} += $nr;
364 if (@srch) { # continue onto next newsgroup
366 } else { # break out of the long response.
367 $$i = long_response_limit;
374 my ($self, $group) = @_;
375 my $no_such = '411 no such news group';
376 my $ng = $self->{nntpd}->{groups}->{$group} or return $no_such;
379 my ($min, $max) = $ng->mm->minmax;
382 $self->{article} = $min;
383 my $est_size = $max - $min;
384 "211 $est_size $min $max $group";
387 sub article_adj ($$) {
388 my ($self, $off) = @_;
389 my $ng = $self->{ng} or return '412 no newsgroup selected';
391 my $n = $self->{article};
392 defined $n or return '420 no current article has been selected';
395 my $mid = $ng->mm->mid_for($n);
397 $n = $off > 0 ? 'next' : 'previous';
398 return "421 no $n article in this group";
400 $self->{article} = $n;
401 "223 $n <$mid> article retrieved - request text separately";
404 sub cmd_next ($) { article_adj($_[0], 1) }
405 sub cmd_last ($) { article_adj($_[0], -1) }
407 # We want to encourage using email and CC-ing everybody involved to avoid
408 # the single-point-of-failure a single server provides.
411 my $ng = $self->{ng};
412 $ng ? "440 mailto:$ng->{-primary_address} to post"
413 : '440 posting not allowed'
418 res($self, '205 closing connection - goodbye!');
423 sub header_append ($$$) {
424 my ($hdr, $k, $v) = @_;
425 my @v = $hdr->header($k);
429 $hdr->header_set($k, @v, $v);
432 sub set_nntp_headers {
433 my ($hdr, $ng, $n, $mid) = @_;
436 $hdr->header_set('Newsgroups', $ng->{newsgroup});
437 $hdr->header_set('Xref', xref($ng, $n));
438 header_append($hdr, 'List-Post', "<mailto:$ng->{-primary_address}>");
439 if (my $url = $ng->base_url) {
440 $mid = uri_escape_utf8($mid);
441 header_append($hdr, 'Archived-At', "<$url$mid/>");
442 header_append($hdr, 'List-Archive', "<$url>");
446 sub art_lookup ($$$) {
447 my ($self, $art, $set_headers) = @_;
448 my $ng = $self->{ng};
452 if ($art =~ /\A\d+\z/o) {
453 $err = '423 no such article number in this group';
456 } elsif ($art =~ /\A<([^>]+)>\z/) {
459 $n = $ng->mm->num_for($mid) if $ng;
460 goto found if defined $n;
461 foreach my $g (values %{$self->{nntpd}->{groups}}) {
462 $n = $g->mm->num_for($mid);
473 $err = '420 no current article has been selected';
474 $n = $self->{article};
475 defined $n or return $err;
477 $ng or return '412 no newsgroup has been selected';
478 $mid = $ng->mm->mid_for($n);
479 defined $mid or return $err;
483 my $s = eval { $ng->msg_by_mid($mid, \$bytes) } or return $err;
484 $s = Email::Simple->new($s);
487 set_nntp_headers($s->header_obj, $ng, $n, $mid);
488 $lines = $s->body =~ tr!\n!\n!;
491 $s->body_set('') if ($set_headers == 2);
493 [ $n, $mid, $s, $bytes, $lines, $ng ];
496 sub simple_body_write ($$) {
500 $body =~ s/^\./../smg;
501 $body =~ s/(?<!\r)\n/\r\n/sg;
502 do_more($self, $body);
503 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
508 my ($self, $art) = @_;
509 $self->{article} = $art if defined $art && $art =~ /\A\d+\z/;
513 my $hdr = $_[0]->header_obj->as_string;
518 sub cmd_article ($;$) {
519 my ($self, $art) = @_;
520 my $r = art_lookup($self, $art, 1);
521 return $r unless ref $r;
522 my ($n, $mid, $s) = @$r;
523 set_art($self, $art);
524 more($self, "220 $n <$mid> article retrieved - head and body follow");
525 do_more($self, _header($s));
526 do_more($self, "\r\n");
527 simple_body_write($self, $s);
531 my ($self, $art) = @_;
532 my $r = art_lookup($self, $art, 2);
533 return $r unless ref $r;
534 my ($n, $mid, $s) = @$r;
535 set_art($self, $art);
536 more($self, "221 $n <$mid> article retrieved - head follows");
537 do_more($self, _header($s));
542 my ($self, $art) = @_;
543 my $r = art_lookup($self, $art, 0);
544 return $r unless ref $r;
545 my ($n, $mid, $s) = @$r;
546 set_art($self, $art);
547 more($self, "222 $n <$mid> article retrieved - body follows");
548 simple_body_write($self, $s);
552 my ($self, $art) = @_;
553 my $r = art_lookup($self, $art, 0);
554 return $r unless ref $r;
555 my ($n, $mid, undef) = @$r;
556 set_art($self, $art);
557 "223 $n <$mid> article retrieved - request text separately";
560 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
562 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
566 more($self, '100 help text follows');
571 my ($self, $range) = @_;
572 my $ng = $self->{ng} or return '412 no news group has been selected';
573 defined $range or return '420 No article(s) selected';
575 my ($min, $max) = $ng->mm->minmax;
576 if ($range =~ /\A(\d+)\z/) {
578 } elsif ($range =~ /\A(\d+)-\z/) {
579 ($beg, $end) = ($1, $max);
580 } elsif ($range =~ /\A(\d+)-(\d+)\z/) {
581 ($beg, $end) = ($1, $2);
585 $beg = $min if ($beg < $min);
586 $end = $max if ($end > $max);
587 return '420 No article(s) selected' if ($beg > $end);
591 sub long_response ($$$$) {
592 my ($self, $beg, $end, $cb) = @_;
593 die "BUG: nested long response" if $self->{long_res};
595 my $fd = $self->{fd};
596 defined $fd or return;
597 # make sure we disable reading during a long response,
598 # clients should not be sending us stuff and making us do more
599 # work while we are stream a response to them
600 $self->watch_read(0);
602 $self->{long_res} = sub {
603 # limit our own running time for fairness with other
604 # clients and to avoid buffering too much:
609 eval { $cb->(\$beg) };
610 } until (($err = $@) || $self->{closed} ||
611 ++$beg > $end || !--$lim || $self->{write_buf_size});
613 if ($err || $self->{closed}) {
614 $self->{long_res} = undef;
618 "%s during long response[$fd] - %0.6f",
621 if ($self->{closed}) {
622 out($self, " deferred[$fd] aborted - %0.6f",
625 update_idle_time($self);
626 $self->watch_read(1);
628 } elsif (!$lim || $self->{write_buf_size}) {
629 # no recursion, schedule another call ASAP
630 # but only after all pending writes are done
631 update_idle_time($self);
634 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
636 $self->{long_res} = undef;
637 $self->watch_read(1);
639 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
642 $self->{long_res}->(); # kick off!
646 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
647 my ($self, $xhdr, $range) = @_;
649 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
650 my ($ng, $n) = mid_lookup($self, $1);
651 return r430 unless $n;
652 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
653 } else { # numeric range
654 $range = $self->{article} unless defined $range;
655 my $r = get_range($self, $range);
656 return $r unless ref $r;
657 my $mm = $self->{ng}->mm;
658 my ($beg, $end) = @$r;
659 more($self, $xhdr ? r221 : r225);
660 long_response($self, $beg, $end, sub {
662 my $mid = $mm->mid_for($$i);
663 more($self, "$$i <$mid>") if defined $mid;
670 "$ng->{domain} $ng->{newsgroup}:$n"
673 sub mid_lookup ($$) {
674 my ($self, $mid) = @_;
675 my $self_ng = $self->{ng};
677 my $n = $self_ng->mm->num_for($mid);
678 return ($self_ng, $n) if defined $n;
680 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
681 next if defined $self_ng && $ng eq $self_ng;
682 my $n = $ng->mm->num_for($mid);
683 return ($ng, $n) if defined $n;
688 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
689 my ($self, $xhdr, $range) = @_;
691 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
692 my ($ng, $n) = mid_lookup($self, $1);
693 return r430 unless $n;
694 hdr_mid_response($self, $xhdr, $ng, $n, $range, xref($ng, $n));
695 } else { # numeric range
696 $range = $self->{article} unless defined $range;
697 my $r = get_range($self, $range);
698 return $r unless ref $r;
699 my $ng = $self->{ng};
701 my ($beg, $end) = @$r;
702 more($self, $xhdr ? r221 : r225);
703 long_response($self, $beg, $end, sub {
705 my $mid = $mm->mid_for($$i);
706 more($self, "$$i ".xref($ng, $$i)) if defined $mid;
711 sub search_header_for {
712 my ($srch, $mid, $field) = @_;
713 my $smsg = $srch->lookup_mail($mid) or return;
717 sub hdr_searchmsg ($$$$) {
718 my ($self, $xhdr, $field, $range) = @_;
719 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
720 my ($ng, $n) = mid_lookup($self, $1);
721 return r430 unless $n;
722 my $v = search_header_for($ng->search, $range, $field);
723 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
724 } else { # numeric range
725 $range = $self->{article} unless defined $range;
726 my $srch = $self->{ng}->search;
727 my $mm = $self->{ng}->mm;
728 my $r = get_range($self, $range);
729 return $r unless ref $r;
730 my ($beg, $end) = @$r;
731 more($self, $xhdr ? r221 : r225);
733 long_response($self, $beg, $end, sub {
735 my $res = $srch->query_xover($beg, $end, $off);
736 my $msgs = $res->{msgs};
737 my $nr = scalar @$msgs or return;
740 foreach my $s (@$msgs) {
741 $tmp .= $s->num . ' ' . $s->$field . "\r\n";
744 do_more($self, $tmp);
745 # -1 to adjust for implicit increment in long_response
746 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
752 my ($self, $xhdr, $header, $range) = @_;
753 my $sub = lc $header;
754 if ($sub eq 'message-id') {
755 hdr_message_id($self, $xhdr, $range);
756 } elsif ($sub eq 'xref') {
757 hdr_xref($self, $xhdr, $range);
758 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
760 hdr_searchmsg($self, $xhdr, $sub, $range);
761 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
762 hdr_searchmsg($self, $xhdr, $1, $range);
764 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
770 my ($self, $header, $range) = @_;
771 do_hdr($self, 0, $header, $range);
775 sub cmd_xhdr ($$;$) {
776 my ($self, $header, $range) = @_;
777 do_hdr($self, 1, $header, $range);
780 sub hdr_mid_prefix ($$$$$) {
781 my ($self, $xhdr, $ng, $n, $mid) = @_;
782 return $mid if $xhdr;
784 # HDR for RFC 3977 users
785 if (my $self_ng = $self->{ng}) {
786 ($self_ng eq $ng) ? $n : '0';
792 sub hdr_mid_response ($$$$$$) {
793 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
796 $res .= r221 . "\r\n";
797 $res .= "$mid $v\r\n";
799 $res .= r225 . "\r\n";
800 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
801 $res .= "$pfx $v\r\n";
803 res($self, $res .= '.');
807 sub cmd_xrover ($;$) {
808 my ($self, $range) = @_;
809 my $ng = $self->{ng} or return '412 no newsgroup selected';
810 (defined $range && $range =~ /[<>]/) and
811 return '420 No article(s) selected'; # no message IDs
813 $range = $self->{article} unless defined $range;
814 my $r = get_range($self, $range);
815 return $r unless ref $r;
816 my ($beg, $end) = @$r;
818 my $srch = $ng->search;
819 more($self, '224 Overview information follows');
820 long_response($self, $beg, $end, sub {
822 my $mid = $mm->mid_for($$i) or return;
823 my $h = search_header_for($srch, $mid, 'references');
824 more($self, "$$i $h");
829 my ($num, $smsg) = @_;
830 # n.b. field access and procedural calls can be
831 # 10%-15% faster than OO method calls:
832 my $s = join("\t", $num,
835 PublicInbox::SearchMsg::date($smsg),
836 '<'.PublicInbox::SearchMsg::mid($smsg).'>',
838 PublicInbox::SearchMsg::bytes($smsg),
839 PublicInbox::SearchMsg::lines($smsg));
845 my ($self, $range) = @_;
846 if ($range && $range =~ /\A<(.+)>\z/) {
847 my ($ng, $n) = mid_lookup($self, $1);
848 my $smsg = $ng->search->lookup_mail($range) or
849 return '430 No article with that message-id';
850 more($self, '224 Overview information follows (multi-line)');
852 # Only set article number column if it's the current group
853 my $self_ng = $self->{ng};
854 $n = 0 if (!$self_ng || $self_ng ne $ng);
855 more($self, over_line($n, $smsg));
858 cmd_xover($self, $range);
862 sub cmd_xover ($;$) {
863 my ($self, $range) = @_;
864 $range = $self->{article} unless defined $range;
865 my $r = get_range($self, $range);
866 return $r unless ref $r;
867 my ($beg, $end) = @$r;
868 more($self, "224 Overview information follows for $beg to $end");
869 my $srch = $self->{ng}->search;
871 long_response($self, $beg, $end, sub {
873 my $res = $srch->query_xover($beg, $end, $off);
874 my $msgs = $res->{msgs};
875 my $nr = scalar @$msgs or return;
879 more($self, join("\r\n", map {
880 over_line(PublicInbox::SearchMsg::num($_), $_);
883 # -1 to adjust for implicit increment in long_response
884 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
889 my ($self, $mid) = @_;
890 return r501 unless $mid =~ /\A<(.+)>\z/;
893 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
894 my $n = $ng->mm->num_for($mid);
895 push @paths, "$ng->{newsgroup}/$n" if defined $n;
897 return '430 no such article on server' unless @paths;
898 '223 '.join(' ', @paths);
902 my ($self, $line) = @_;
903 do_write($self, $line . "\r\n");
907 my ($self, $line) = @_;
908 do_more($self, $line . "\r\n");
912 my ($self, $data) = @_;
913 my $done = $self->write($data);
914 die if $self->{closed};
916 # Do not watch for readability if we have data in the queue,
917 # instead re-enable watching for readability when we can
918 $self->watch_read(0) if (!$done || $self->{long_res});
924 my ($self, $fmt, @args) = @_;
925 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
929 my ($self, $fmt, @args) = @_;
930 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
933 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
936 my ($self, $data) = @_;
937 if (MSG_MORE && !$self->{write_buf_size}) {
938 my $n = send($self->{sock}, $data, MSG_MORE);
940 my $dlen = length($data);
941 return 1 if $n == $dlen; # all done!
942 $data = substr($data, $n, $dlen - $n);
945 do_write($self, $data);
948 # callbacks for Danga::Socket
950 sub event_hup { $_[0]->close }
951 sub event_err { $_[0]->close }
955 update_idle_time($self);
956 # only continue watching for readability when we are done writing:
957 if ($self->write(undef) == 1 && !$self->{long_res}) {
958 $self->watch_read(1);
964 use constant LINE_MAX => 512; # RFC 977 section 2.3
967 my $buf = $self->read(LINE_MAX) or return $self->close;
968 $self->{rbuf} .= $$buf;
969 while ($r > 0 && $self->{rbuf} =~ s/\A\s*([^\r\n]+)\r?\n//) {
971 return $self->close if $line =~ /[[:cntrl:]]/s;
973 my $fd = $self->{fd};
974 $r = eval { process_line($self, $line) };
975 my $d = $self->{long_res} ?
976 " deferred[$fd]" : '';
977 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
980 return $self->close if $r < 0;
981 my $len = length($self->{rbuf});
982 return $self->close if ($len >= LINE_MAX);
983 update_idle_time($self);
987 my ($self, $bool) = @_;
988 my $rv = $self->SUPER::watch_read($bool);
989 if ($bool && $self->{rbuf} ne '') {
990 # Force another read if there is a pipelined request.
991 # We don't know if the socket has anything for us to read,
992 # and we must double-check again by the time the timer fires
993 # in case we really did dispatch a read event and started
994 # another long response.
996 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
1001 sub not_idle_long ($$) {
1002 my ($self, $now) = @_;
1003 defined(my $fd = $self->{fd}) or return;
1004 my $ary = $EXPMAP->{$fd} or return;
1005 my $exp_at = $ary->[0] + $EXPTIME;
1009 # for graceful shutdown in PublicInbox::Daemon:
1011 my ($self, $now) = @_;
1012 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size} ||
1013 not_idle_long($self, $now));