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;
523 # for leafnode compatibility, we need to ensure Message-ID headers
524 # are only a single line. We can't subclass Email::Simple::Header
525 # and override _default_fold_at in here, either; since that won't
526 # affect messages already in the archive.
527 $hdr =~ s/^(Message-ID:)[ \t]*\r\n[ \t]+([^\r]+)\r\n/$1 $2\r\n/igsm;
532 sub cmd_article ($;$) {
533 my ($self, $art) = @_;
534 my $r = art_lookup($self, $art, 1);
535 return $r unless ref $r;
536 my ($n, $mid, $s) = @$r;
537 set_art($self, $art);
538 more($self, "220 $n <$mid> article retrieved - head and body follow");
539 do_more($self, _header($s));
540 do_more($self, "\r\n");
541 simple_body_write($self, $s);
545 my ($self, $art) = @_;
546 my $r = art_lookup($self, $art, 2);
547 return $r unless ref $r;
548 my ($n, $mid, $s) = @$r;
549 set_art($self, $art);
550 more($self, "221 $n <$mid> article retrieved - head follows");
551 do_more($self, _header($s));
556 my ($self, $art) = @_;
557 my $r = art_lookup($self, $art, 0);
558 return $r unless ref $r;
559 my ($n, $mid, $s) = @$r;
560 set_art($self, $art);
561 more($self, "222 $n <$mid> article retrieved - body follows");
562 simple_body_write($self, $s);
566 my ($self, $art) = @_;
567 my $r = art_lookup($self, $art, 0);
568 return $r unless ref $r;
569 my ($n, $mid, undef) = @$r;
570 set_art($self, $art);
571 "223 $n <$mid> article retrieved - request text separately";
574 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
576 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
580 more($self, '100 help text follows');
585 my ($self, $range) = @_;
586 my $ng = $self->{ng} or return '412 no news group has been selected';
587 defined $range or return '420 No article(s) selected';
589 my ($min, $max) = $ng->mm->minmax;
590 if ($range =~ /\A([0-9]+)\z/) {
592 } elsif ($range =~ /\A([0-9]+)-\z/) {
593 ($beg, $end) = ($1, $max);
594 } elsif ($range =~ /\A([0-9]+)-([0-9]+)\z/) {
595 ($beg, $end) = ($1, $2);
599 $beg = $min if ($beg < $min);
600 $end = $max if ($end > $max);
601 return '420 No article(s) selected' if ($beg > $end);
605 sub long_response ($$) {
606 my ($self, $cb) = @_;
607 die "BUG: nested long response" if $self->{long_res};
609 my $fd = $self->{fd};
610 defined $fd or return;
611 # make sure we disable reading during a long response,
612 # clients should not be sending us stuff and making us do more
613 # work while we are stream a response to them
614 $self->watch_read(0);
616 $self->{long_res} = sub {
617 my $more = eval { $cb->() };
618 if ($@ || $self->{closed}) {
619 $self->{long_res} = undef;
623 "%s during long response[$fd] - %0.6f",
626 if ($self->{closed}) {
627 out($self, " deferred[$fd] aborted - %0.6f",
630 update_idle_time($self);
633 } elsif ($more) { # $self->{write_buf_size}:
634 # no recursion, schedule another call ASAP
635 # but only after all pending writes are done
636 update_idle_time($self);
639 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
641 $self->{long_res} = undef;
644 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
647 $self->{long_res}->(); # kick off!
651 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
652 my ($self, $xhdr, $range) = @_;
654 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
655 my ($ng, $n) = mid_lookup($self, $1);
656 return r430 unless $n;
657 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
658 } else { # numeric range
659 $range = $self->{article} unless defined $range;
660 my $r = get_range($self, $range);
661 return $r unless ref $r;
662 my $mm = $self->{ng}->mm;
663 my ($beg, $end) = @$r;
664 more($self, $xhdr ? r221 : r225);
665 long_response($self, sub {
666 my $r = $mm->msg_range(\$beg, $end);
668 more($self, join("\r\n", map {
676 sub mid_lookup ($$) {
677 my ($self, $mid) = @_;
678 my $self_ng = $self->{ng};
680 my $n = $self_ng->mm->num_for($mid);
681 return ($self_ng, $n) if defined $n;
683 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
684 next if defined $self_ng && $ng eq $self_ng;
685 my $n = $ng->mm->num_for($mid);
686 return ($ng, $n) if defined $n;
691 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
692 my ($self, $xhdr, $range) = @_;
694 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
696 my ($ng, $n) = mid_lookup($self, $mid);
697 return r430 unless $n;
698 hdr_mid_response($self, $xhdr, $ng, $n, $range,
699 xref($self, $ng, $n, $mid));
700 } else { # numeric range
701 $range = $self->{article} unless defined $range;
702 my $r = get_range($self, $range);
703 return $r unless ref $r;
704 my $ng = $self->{ng};
706 my ($beg, $end) = @$r;
707 more($self, $xhdr ? r221 : r225);
708 long_response($self, sub {
709 my $r = $mm->msg_range(\$beg, $end);
711 more($self, join("\r\n", map {
713 "$num ".xref($self, $ng, $num, $_->[1]);
720 sub over_header_for {
721 my ($over, $num, $field) = @_;
722 my $smsg = $over->get_art($num) or return;
723 return PublicInbox::SearchMsg::date($smsg) if $field eq 'date';
727 sub hdr_searchmsg ($$$$) {
728 my ($self, $xhdr, $field, $range) = @_;
729 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
730 my ($ng, $n) = mid_lookup($self, $1);
731 return r430 unless defined $n;
732 my $v = over_header_for($ng->over, $n, $field);
733 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
734 } else { # numeric range
735 $range = $self->{article} unless defined $range;
736 my $over = $self->{ng}->over;
737 my $mm = $self->{ng}->mm;
738 my $r = get_range($self, $range);
739 return $r unless ref $r;
740 my ($beg, $end) = @$r;
741 more($self, $xhdr ? r221 : r225);
743 long_response($self, sub {
744 my $msgs = $over->query_xover($cur, $end);
745 my $nr = scalar @$msgs or return;
747 foreach my $s (@$msgs) {
748 $tmp .= $s->{num} . ' ' . $s->$field . "\r\n";
751 do_more($self, $tmp);
752 $cur = $msgs->[-1]->{num} + 1;
758 my ($self, $xhdr, $header, $range) = @_;
759 my $sub = lc $header;
760 if ($sub eq 'message-id') {
761 hdr_message_id($self, $xhdr, $range);
762 } elsif ($sub eq 'xref') {
763 hdr_xref($self, $xhdr, $range);
764 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
766 hdr_searchmsg($self, $xhdr, $sub, $range);
767 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
768 hdr_searchmsg($self, $xhdr, $1, $range);
770 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
776 my ($self, $header, $range) = @_;
777 do_hdr($self, 0, $header, $range);
781 sub cmd_xhdr ($$;$) {
782 my ($self, $header, $range) = @_;
783 do_hdr($self, 1, $header, $range);
786 sub hdr_mid_prefix ($$$$$) {
787 my ($self, $xhdr, $ng, $n, $mid) = @_;
788 return $mid if $xhdr;
790 # HDR for RFC 3977 users
791 if (my $self_ng = $self->{ng}) {
792 ($self_ng eq $ng) ? $n : '0';
798 sub hdr_mid_response ($$$$$$) {
799 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
802 $res .= r221 . "\r\n";
803 $res .= "$mid $v\r\n";
805 $res .= r225 . "\r\n";
806 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
807 $res .= "$pfx $v\r\n";
809 res($self, $res .= '.');
813 sub cmd_xrover ($;$) {
814 my ($self, $range) = @_;
815 my $ng = $self->{ng} or return '412 no newsgroup selected';
816 (defined $range && $range =~ /[<>]/) and
817 return '420 No article(s) selected'; # no message IDs
819 $range = $self->{article} unless defined $range;
820 my $r = get_range($self, $range);
821 return $r unless ref $r;
822 my ($beg, $end) = @$r;
824 my $over = $ng->over;
825 more($self, '224 Overview information follows');
827 long_response($self, sub {
828 my $h = over_header_for($over, $beg, 'references');
829 more($self, "$beg $h") if defined($h);
834 sub over_line ($$$$) {
835 my ($self, $ng, $num, $smsg) = @_;
836 # n.b. field access and procedural calls can be
837 # 10%-15% faster than OO method calls:
838 my $s = join("\t", $num,
841 PublicInbox::SearchMsg::date($smsg),
846 "Xref: " . xref($self, $ng, $num, $smsg->{mid}));
852 my ($self, $range) = @_;
853 if ($range && $range =~ /\A<(.+)>\z/) {
854 my ($ng, $n) = mid_lookup($self, $1);
855 defined $n or return r430;
856 my $smsg = $ng->over->get_art($n) or return r430;
857 more($self, '224 Overview information follows (multi-line)');
859 # Only set article number column if it's the current group
860 my $self_ng = $self->{ng};
861 $n = 0 if (!$self_ng || $self_ng ne $ng);
862 more($self, over_line($self, $ng, $n, $smsg));
865 cmd_xover($self, $range);
869 sub cmd_xover ($;$) {
870 my ($self, $range) = @_;
871 $range = $self->{article} unless defined $range;
872 my $r = get_range($self, $range);
873 return $r unless ref $r;
874 my ($beg, $end) = @$r;
875 more($self, "224 Overview information follows for $beg to $end");
876 my $over = $self->{ng}->over;
878 long_response($self, sub {
879 my $msgs = $over->query_xover($cur, $end);
880 my $nr = scalar @$msgs or return;
883 more($self, join("\r\n", map {
884 over_line($self, $self->{ng}, $_->{num}, $_);
886 $cur = $msgs->[-1]->{num} + 1;
891 my ($self, $mid) = @_;
892 return r501 unless $mid =~ /\A<(.+)>\z/;
895 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
896 my $n = $ng->mm->num_for($mid);
897 push @paths, "$ng->{newsgroup}/$n" if defined $n;
899 return '430 no such article on server' unless @paths;
900 '223 '.join(' ', @paths);
904 my ($self, $line) = @_;
905 do_write($self, $line . "\r\n");
909 my ($self, $line) = @_;
910 do_more($self, $line . "\r\n");
914 my ($self, $data) = @_;
915 my $done = $self->write($data);
916 return 0 if $self->{closed};
918 # Do not watch for readability if we have data in the queue,
919 # instead re-enable watching for readability when we can
920 $self->watch_read(0) if (!$done || $self->{long_res});
926 my ($self, $fmt, @args) = @_;
927 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
931 my ($self, $fmt, @args) = @_;
932 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
935 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
938 my ($self, $data) = @_;
939 if (MSG_MORE && !$self->{write_buf_size}) {
940 my $n = send($self->{sock}, $data, MSG_MORE);
942 my $dlen = length($data);
943 return 1 if $n == $dlen; # all done!
944 $data = substr($data, $n, $dlen - $n);
947 do_write($self, $data);
950 # callbacks for PublicInbox::DS
952 sub event_hup { $_[0]->close }
953 sub event_err { $_[0]->close }
957 update_idle_time($self);
958 # only continue watching for readability when we are done writing:
959 if ($self->write(undef) == 1 && !$self->{long_res}) {
960 $self->watch_read(1);
966 use constant LINE_MAX => 512; # RFC 977 section 2.3
968 if (index($self->{rbuf}, "\n") < 0) {
969 my $buf = $self->read(LINE_MAX) or return $self->close;
970 $self->{rbuf} .= $$buf;
973 while ($r > 0 && $self->{rbuf} =~ s/\A[ \t\r\n]*([^\r\n]*)\r?\n//) {
975 return $self->close if $line =~ /[[:cntrl:]]/s;
977 my $fd = $self->{fd};
978 $r = eval { process_line($self, $line) };
979 my $d = $self->{long_res} ?
980 " deferred[$fd]" : '';
981 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
984 return $self->close if $r < 0;
985 my $len = length($self->{rbuf});
986 return $self->close if ($len >= LINE_MAX);
987 update_idle_time($self);
992 if (index($self->{rbuf}, "\n") >= 0) {
993 # Force another read if there is a pipelined request.
994 # We don't know if the socket has anything for us to read,
995 # and we must double-check again by the time the timer fires
996 # in case we really did dispatch a read event and started
997 # another long response.
999 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
1001 # no pipelined requests available, let the kernel know
1002 # to wake us up if there's more
1003 $self->watch_read(1); # PublicInbox::DS::watch_read
1007 sub not_idle_long ($$) {
1008 my ($self, $now) = @_;
1009 defined(my $fd = $self->{fd}) or return;
1010 my $ary = $EXPMAP->{$fd} or return;
1011 my $exp_at = $ary->[0] + $EXPTIME;
1015 # for graceful shutdown in PublicInbox::Daemon:
1017 my ($self, $now) = @_;
1018 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size} ||
1019 not_idle_long($self, $now));