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 ($$$$$) {
435 my ($self, $hdr, $ng, $n, $mid) = @_;
437 # why? leafnode requires a Path: header for some inexplicable
438 # reason. We'll fake the shortest one possible.
439 $hdr->header_set('Path', 'y');
441 # leafnode (and maybe other NNTP clients) have trouble dealing
442 # with v2 messages which have multiple Message-IDs (either due
443 # to our own content-based dedupe or buggy git-send-email versions).
444 my @mids = $hdr->header('Message-ID');
445 if (scalar(@mids) > 1) {
447 $hdr->header_set('Message-ID', $mid0);
448 my @alt = $hdr->header('X-Alt-Message-ID');
449 my %seen = map { $_ => 1 } (@alt, $mid0);
450 foreach my $m (@mids) {
454 $hdr->header_set('X-Alt-Message-ID', @alt);
458 my $xref = xref($self, $ng, $n, $mid);
459 $hdr->header_set('Xref', $xref);
460 $xref =~ s/:[0-9]+//g;
461 $hdr->header_set('Newsgroups', (split(/ /, $xref, 2))[1]);
462 header_append($hdr, 'List-Post', "<mailto:$ng->{-primary_address}>");
463 if (my $url = $ng->base_url) {
464 $mid = mid_escape($mid);
465 header_append($hdr, 'Archived-At', "<$url$mid/>");
466 header_append($hdr, 'List-Archive', "<$url>");
470 sub art_lookup ($$$) {
471 my ($self, $art, $set_headers) = @_;
472 my $ng = $self->{ng};
476 if ($art =~ /\A[0-9]+\z/) {
477 $err = '423 no such article number in this group';
480 } elsif ($art =~ /\A<([^>]+)>\z/) {
483 $n = $ng->mm->num_for($mid) if $ng;
484 goto found if defined $n;
485 foreach my $g (values %{$self->{nntpd}->{groups}}) {
486 $n = $g->mm->num_for($mid);
497 $err = '420 no current article has been selected';
498 $n = $self->{article};
499 defined $n or return $err;
501 $ng or return '412 no newsgroup has been selected';
502 $mid = $ng->mm->mid_for($n);
503 defined $mid or return $err;
506 my $smsg = $ng->over->get_art($n) or return $err;
507 my $msg = $ng->msg_by_smsg($smsg) or return $err;
508 my $s = Email::Simple->new($msg);
510 set_nntp_headers($self, $s->header_obj, $ng, $n, $mid);
513 $s->body_set('') if ($set_headers == 2);
515 [ $n, $mid, $s, $smsg->bytes, $smsg->lines, $ng ];
518 sub simple_body_write ($$) {
522 $body =~ s/^\./../smg;
523 $body =~ s/(?<!\r)\n/\r\n/sg;
524 do_more($self, $body);
525 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
530 my ($self, $art) = @_;
531 $self->{article} = $art if defined $art && $art =~ /\A[0-9]+\z/;
535 my $hdr = $_[0]->header_obj->as_string;
537 $hdr =~ s/(?<!\r)\n/\r\n/sg;
539 # for leafnode compatibility, we need to ensure Message-ID headers
540 # are only a single line. We can't subclass Email::Simple::Header
541 # and override _default_fold_at in here, either; since that won't
542 # affect messages already in the archive.
543 $hdr =~ s/^(Message-ID:)[ \t]*\r\n[ \t]+([^\r]+)\r\n/$1 $2\r\n/igsm;
548 sub cmd_article ($;$) {
549 my ($self, $art) = @_;
550 my $r = art_lookup($self, $art, 1);
551 return $r unless ref $r;
552 my ($n, $mid, $s) = @$r;
553 set_art($self, $art);
554 more($self, "220 $n <$mid> article retrieved - head and body follow");
555 do_more($self, _header($s));
556 do_more($self, "\r\n");
557 simple_body_write($self, $s);
561 my ($self, $art) = @_;
562 my $r = art_lookup($self, $art, 2);
563 return $r unless ref $r;
564 my ($n, $mid, $s) = @$r;
565 set_art($self, $art);
566 more($self, "221 $n <$mid> article retrieved - head follows");
567 do_more($self, _header($s));
572 my ($self, $art) = @_;
573 my $r = art_lookup($self, $art, 0);
574 return $r unless ref $r;
575 my ($n, $mid, $s) = @$r;
576 set_art($self, $art);
577 more($self, "222 $n <$mid> article retrieved - body follows");
578 simple_body_write($self, $s);
582 my ($self, $art) = @_;
583 my $r = art_lookup($self, $art, 0);
584 return $r unless ref $r;
585 my ($n, $mid, undef) = @$r;
586 set_art($self, $art);
587 "223 $n <$mid> article retrieved - request text separately";
590 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
592 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
596 more($self, '100 help text follows');
601 my ($self, $range) = @_;
602 my $ng = $self->{ng} or return '412 no news group has been selected';
603 defined $range or return '420 No article(s) selected';
605 my ($min, $max) = $ng->mm->minmax;
606 if ($range =~ /\A([0-9]+)\z/) {
608 } elsif ($range =~ /\A([0-9]+)-\z/) {
609 ($beg, $end) = ($1, $max);
610 } elsif ($range =~ /\A([0-9]+)-([0-9]+)\z/) {
611 ($beg, $end) = ($1, $2);
615 $beg = $min if ($beg < $min);
616 $end = $max if ($end > $max);
617 return '420 No article(s) selected' if ($beg > $end);
621 sub long_response ($$) {
622 my ($self, $cb) = @_;
623 die "BUG: nested long response" if $self->{long_res};
625 my $fd = $self->{fd};
626 defined $fd or return;
627 # make sure we disable reading during a long response,
628 # clients should not be sending us stuff and making us do more
629 # work while we are stream a response to them
630 $self->watch_read(0);
632 $self->{long_res} = sub {
633 my $more = eval { $cb->() };
634 if ($@ || $self->{closed}) {
635 $self->{long_res} = undef;
639 "%s during long response[$fd] - %0.6f",
642 if ($self->{closed}) {
643 out($self, " deferred[$fd] aborted - %0.6f",
646 update_idle_time($self);
649 } elsif ($more) { # $self->{write_buf_size}:
650 # no recursion, schedule another call ASAP
651 # but only after all pending writes are done
652 update_idle_time($self);
655 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
657 $self->{long_res} = undef;
660 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
663 $self->{long_res}->(); # kick off!
667 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
668 my ($self, $xhdr, $range) = @_;
670 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
671 my ($ng, $n) = mid_lookup($self, $1);
672 return r430 unless $n;
673 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
674 } else { # numeric range
675 $range = $self->{article} unless defined $range;
676 my $r = get_range($self, $range);
677 return $r unless ref $r;
678 my $mm = $self->{ng}->mm;
679 my ($beg, $end) = @$r;
680 more($self, $xhdr ? r221 : r225);
681 long_response($self, sub {
682 my $r = $mm->msg_range(\$beg, $end);
684 more($self, join("\r\n", map {
692 sub mid_lookup ($$) {
693 my ($self, $mid) = @_;
694 my $self_ng = $self->{ng};
696 my $n = $self_ng->mm->num_for($mid);
697 return ($self_ng, $n) if defined $n;
699 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
700 next if defined $self_ng && $ng eq $self_ng;
701 my $n = $ng->mm->num_for($mid);
702 return ($ng, $n) if defined $n;
707 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
708 my ($self, $xhdr, $range) = @_;
710 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
712 my ($ng, $n) = mid_lookup($self, $mid);
713 return r430 unless $n;
714 hdr_mid_response($self, $xhdr, $ng, $n, $range,
715 xref($self, $ng, $n, $mid));
716 } else { # numeric range
717 $range = $self->{article} unless defined $range;
718 my $r = get_range($self, $range);
719 return $r unless ref $r;
720 my $ng = $self->{ng};
722 my ($beg, $end) = @$r;
723 more($self, $xhdr ? r221 : r225);
724 long_response($self, sub {
725 my $r = $mm->msg_range(\$beg, $end);
727 more($self, join("\r\n", map {
729 "$num ".xref($self, $ng, $num, $_->[1]);
736 sub over_header_for {
737 my ($over, $num, $field) = @_;
738 my $smsg = $over->get_art($num) or return;
739 return PublicInbox::SearchMsg::date($smsg) if $field eq 'date';
743 sub hdr_searchmsg ($$$$) {
744 my ($self, $xhdr, $field, $range) = @_;
745 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
746 my ($ng, $n) = mid_lookup($self, $1);
747 return r430 unless defined $n;
748 my $v = over_header_for($ng->over, $n, $field);
749 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
750 } else { # numeric range
751 $range = $self->{article} unless defined $range;
752 my $over = $self->{ng}->over;
753 my $mm = $self->{ng}->mm;
754 my $r = get_range($self, $range);
755 return $r unless ref $r;
756 my ($beg, $end) = @$r;
757 more($self, $xhdr ? r221 : r225);
759 long_response($self, sub {
760 my $msgs = $over->query_xover($cur, $end);
761 my $nr = scalar @$msgs or return;
763 foreach my $s (@$msgs) {
764 $tmp .= $s->{num} . ' ' . $s->$field . "\r\n";
767 do_more($self, $tmp);
768 $cur = $msgs->[-1]->{num} + 1;
774 my ($self, $xhdr, $header, $range) = @_;
775 my $sub = lc $header;
776 if ($sub eq 'message-id') {
777 hdr_message_id($self, $xhdr, $range);
778 } elsif ($sub eq 'xref') {
779 hdr_xref($self, $xhdr, $range);
780 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
782 hdr_searchmsg($self, $xhdr, $sub, $range);
783 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
784 hdr_searchmsg($self, $xhdr, $1, $range);
786 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
792 my ($self, $header, $range) = @_;
793 do_hdr($self, 0, $header, $range);
797 sub cmd_xhdr ($$;$) {
798 my ($self, $header, $range) = @_;
799 do_hdr($self, 1, $header, $range);
802 sub hdr_mid_prefix ($$$$$) {
803 my ($self, $xhdr, $ng, $n, $mid) = @_;
804 return $mid if $xhdr;
806 # HDR for RFC 3977 users
807 if (my $self_ng = $self->{ng}) {
808 ($self_ng eq $ng) ? $n : '0';
814 sub hdr_mid_response ($$$$$$) {
815 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
818 $res .= r221 . "\r\n";
819 $res .= "$mid $v\r\n";
821 $res .= r225 . "\r\n";
822 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
823 $res .= "$pfx $v\r\n";
825 res($self, $res .= '.');
829 sub cmd_xrover ($;$) {
830 my ($self, $range) = @_;
831 my $ng = $self->{ng} or return '412 no newsgroup selected';
832 (defined $range && $range =~ /[<>]/) and
833 return '420 No article(s) selected'; # no message IDs
835 $range = $self->{article} unless defined $range;
836 my $r = get_range($self, $range);
837 return $r unless ref $r;
838 my ($beg, $end) = @$r;
840 my $over = $ng->over;
841 more($self, '224 Overview information follows');
843 long_response($self, sub {
844 my $h = over_header_for($over, $beg, 'references');
845 more($self, "$beg $h") if defined($h);
850 sub over_line ($$$$) {
851 my ($self, $ng, $num, $smsg) = @_;
852 # n.b. field access and procedural calls can be
853 # 10%-15% faster than OO method calls:
854 my $s = join("\t", $num,
857 PublicInbox::SearchMsg::date($smsg),
862 "Xref: " . xref($self, $ng, $num, $smsg->{mid}));
868 my ($self, $range) = @_;
869 if ($range && $range =~ /\A<(.+)>\z/) {
870 my ($ng, $n) = mid_lookup($self, $1);
871 defined $n or return r430;
872 my $smsg = $ng->over->get_art($n) or return r430;
873 more($self, '224 Overview information follows (multi-line)');
875 # Only set article number column if it's the current group
876 my $self_ng = $self->{ng};
877 $n = 0 if (!$self_ng || $self_ng ne $ng);
878 more($self, over_line($self, $ng, $n, $smsg));
881 cmd_xover($self, $range);
885 sub cmd_xover ($;$) {
886 my ($self, $range) = @_;
887 $range = $self->{article} unless defined $range;
888 my $r = get_range($self, $range);
889 return $r unless ref $r;
890 my ($beg, $end) = @$r;
891 more($self, "224 Overview information follows for $beg to $end");
892 my $over = $self->{ng}->over;
894 long_response($self, sub {
895 my $msgs = $over->query_xover($cur, $end);
896 my $nr = scalar @$msgs or return;
899 more($self, join("\r\n", map {
900 over_line($self, $self->{ng}, $_->{num}, $_);
902 $cur = $msgs->[-1]->{num} + 1;
907 my ($self, $mid) = @_;
908 return r501 unless $mid =~ /\A<(.+)>\z/;
911 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
912 my $n = $ng->mm->num_for($mid);
913 push @paths, "$ng->{newsgroup}/$n" if defined $n;
915 return '430 no such article on server' unless @paths;
916 '223 '.join(' ', @paths);
920 my ($self, $line) = @_;
921 do_write($self, $line . "\r\n");
925 my ($self, $line) = @_;
926 do_more($self, $line . "\r\n");
930 my ($self, $data) = @_;
931 my $done = $self->write($data);
932 return 0 if $self->{closed};
934 # Do not watch for readability if we have data in the queue,
935 # instead re-enable watching for readability when we can
936 $self->watch_read(0) if (!$done || $self->{long_res});
942 my ($self, $fmt, @args) = @_;
943 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
947 my ($self, $fmt, @args) = @_;
948 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
951 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
954 my ($self, $data) = @_;
955 if (MSG_MORE && !$self->{write_buf_size}) {
956 my $n = send($self->{sock}, $data, MSG_MORE);
958 my $dlen = length($data);
959 return 1 if $n == $dlen; # all done!
960 $data = substr($data, $n, $dlen - $n);
963 do_write($self, $data);
966 # callbacks for PublicInbox::DS
968 sub event_hup { $_[0]->close }
969 sub event_err { $_[0]->close }
973 update_idle_time($self);
974 # only continue watching for readability when we are done writing:
975 if ($self->write(undef) == 1 && !$self->{long_res}) {
976 $self->watch_read(1);
982 use constant LINE_MAX => 512; # RFC 977 section 2.3
984 if (index($self->{rbuf}, "\n") < 0) {
985 my $buf = $self->read(LINE_MAX) or return $self->close;
986 $self->{rbuf} .= $$buf;
989 while ($r > 0 && $self->{rbuf} =~ s/\A[ \t\r\n]*([^\r\n]*)\r?\n//) {
991 return $self->close if $line =~ /[[:cntrl:]]/s;
993 my $fd = $self->{fd};
994 $r = eval { process_line($self, $line) };
995 my $d = $self->{long_res} ?
996 " deferred[$fd]" : '';
997 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
1000 return $self->close if $r < 0;
1001 my $len = length($self->{rbuf});
1002 return $self->close if ($len >= LINE_MAX);
1003 update_idle_time($self);
1008 if (index($self->{rbuf}, "\n") >= 0) {
1009 # Force another read if there is a pipelined request.
1010 # We don't know if the socket has anything for us to read,
1011 # and we must double-check again by the time the timer fires
1012 # in case we really did dispatch a read event and started
1013 # another long response.
1014 push @$nextq, $self;
1015 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
1017 # no pipelined requests available, let the kernel know
1018 # to wake us up if there's more
1019 $self->watch_read(1); # PublicInbox::DS::watch_read
1023 sub not_idle_long ($$) {
1024 my ($self, $now) = @_;
1025 defined(my $fd = $self->{fd}) or return;
1026 my $ary = $EXPMAP->{$fd} or return;
1027 my $exp_at = $ary->[0] + $EXPTIME;
1031 # for graceful shutdown in PublicInbox::Daemon:
1033 my ($self, $now) = @_;
1034 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size} ||
1035 not_idle_long($self, $now));