1 # Copyright (C) 2015-2018 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # Each instance of this represents a NNTP client socket
5 package PublicInbox::NNTP;
8 use base qw(Danga::Socket);
9 use fields qw(nntpd article rbuf ng long_res);
10 use PublicInbox::Search;
11 use PublicInbox::Msgmap;
12 use PublicInbox::MID qw(mid_escape);
14 require PublicInbox::EvCleanup;
16 use POSIX qw(strftime);
17 use Time::HiRes qw(clock_gettime CLOCK_MONOTONIC);
18 use Digest::SHA qw(sha1_hex);
19 use Time::Local qw(timegm timelocal);
21 r501 => '501 command syntax error',
22 r221 => '221 Header follows',
23 r224 => '224 Overview information follows (multi-line)',
24 r225 => '225 Headers follow (multi-line)',
25 r430 => '430 No article with that message-id',
26 long_response_limit => 0xffffffff,
29 sub now () { clock_gettime(CLOCK_MONOTONIC) };
31 my @OVERVIEW = qw(Subject From Date Message-ID References);
32 my $OVERVIEW_FMT = join(":\r\n", @OVERVIEW, qw(Bytes Lines)) . ":\r\n";
33 my $LIST_HEADERS = join("\r\n", @OVERVIEW,
34 qw(:bytes :lines Xref To Cc)) . "\r\n";
36 # disable commands with easy DoS potential:
37 # LISTGROUP could get pretty bad, too...
38 my %DISABLED; # = map { $_ => 1 } qw(xover list_overview_fmt newnews xhdr);
40 my $EXPMAP; # fd -> [ idle_time, $self ]
42 our $EXPTIME = 180; # 3 minutes
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 ];
70 my $old = $now - $exp;
73 while (my ($fd, $v) = each %$EXPMAP) {
74 my ($idle_time, $nntp) = @$v;
75 if ($idle_time < $old) {
76 $nntp->close; # idempotent
84 $expt = PublicInbox::EvCleanup::later(*expire_old);
87 # noop to kick outselves out of the loop ASAP so descriptors
89 PublicInbox::EvCleanup::asap(sub {});
94 my ($class, $sock, $nntpd) = @_;
95 my $self = fields::new($class);
96 $self->SUPER::new($sock);
97 $self->{nntpd} = $nntpd;
98 res($self, '201 server ready - post via email');
100 $self->watch_read(1);
101 update_idle_time($self);
102 $expt ||= PublicInbox::EvCleanup::later(*expire_old);
107 my ($cb, $argc) = @_;
108 my $tot = prototype $cb;
109 my ($nreq, undef) = split(';', $tot);
110 $nreq = ($nreq =~ tr/$//) - 1;
111 $tot = ($tot =~ tr/$//) - 1;
112 ($argc <= $tot && $argc >= $nreq);
115 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
116 sub process_line ($$) {
118 my ($req, @args) = split(/\s+/, $l);
122 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
124 return res($self, '500 command not recognized') unless $req;
125 return res($self, r501) unless args_ok($req, scalar @args);
127 my $res = eval { $req->($self, @args) };
129 if ($err && !$self->{closed}) {
132 err($self, 'error from: %s (%s)', $l, $err);
133 $res = '503 program fault - command not performed';
135 return 0 unless defined $res;
140 my ($self, $arg) = @_;
142 return r501 unless $arg eq 'READER';
143 '201 Posting prohibited';
146 sub cmd_slave ($) { '202 slave status noted' }
148 sub cmd_xgtitle ($;$) {
149 my ($self, $wildmat) = @_;
150 more($self, '282 list of groups and descriptions follows');
151 list_newsgroups($self, $wildmat);
155 sub list_overview_fmt ($) {
157 do_more($self, $OVERVIEW_FMT);
160 sub list_headers ($;$) {
162 do_more($self, $LIST_HEADERS);
165 sub list_active ($;$) {
166 my ($self, $wildmat) = @_;
167 wildmat2re($wildmat);
168 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
169 $ng->{newsgroup} =~ $wildmat or next;
170 group_line($self, $ng);
174 sub list_active_times ($;$) {
175 my ($self, $wildmat) = @_;
176 wildmat2re($wildmat);
177 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
178 $ng->{newsgroup} =~ $wildmat or next;
179 my $c = eval { $ng->mm->created_at } || time;
180 more($self, "$ng->{newsgroup} $c $ng->{-primary_address}");
184 sub list_newsgroups ($;$) {
185 my ($self, $wildmat) = @_;
186 wildmat2re($wildmat);
187 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
188 $ng->{newsgroup} =~ $wildmat or next;
189 my $d = $ng->description;
190 more($self, "$ng->{newsgroup} $d");
194 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
195 sub cmd_list ($;$$) {
196 my ($self, @args) = @_;
198 my $arg = shift @args;
199 $arg =~ tr/A-Z./a-z_/;
201 return r501 if $DISABLED{$arg};
207 return r501 unless $arg && args_ok($arg, scalar @args);
208 more($self, '215 information follows');
209 $arg->($self, @args);
211 more($self, '215 list of newsgroups follows');
212 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
213 group_line($self, $ng);
219 sub cmd_listgroup ($;$) {
220 my ($self, $group) = @_;
221 if (defined $group) {
222 my $res = cmd_group($self, $group);
223 return $res if ($res !~ /\A211 /);
227 $self->{ng} or return '412 no newsgroup selected';
228 long_response($self, 0, long_response_limit, sub {
230 my $nr = $self->{ng}->mm->id_batch($$i, sub {
232 more($self, join("\r\n", @$ary));
235 # -1 to adjust for implicit increment in long_response
236 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
240 sub parse_time ($$;$) {
241 my ($date, $time, $gmt) = @_;
242 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
244 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt";
247 my @now = $gmt ? gmtime : localtime;
248 my ($YYYY, $MM, $DD);
249 if (length($date) == 8) { # RFC 3977 allows YYYYMMDD
250 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
251 } else { # legacy clients send YYMMDD
252 ($YYYY, $MM, $DD) = unpack('A2A2A2', $date);
253 my $cur_year = $now[5] + 1900;
254 if ($YYYY > $cur_year) {
255 $YYYY += int($cur_year / 1000) * 1000 - 100;
259 timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
261 timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
265 sub group_line ($$) {
266 my ($self, $ng) = @_;
267 my ($min, $max) = $ng->mm->minmax;
268 more($self, "$ng->{newsgroup} $max $min n") if defined $min && defined $max;
271 sub cmd_newgroups ($$$;$$) {
272 my ($self, $date, $time, $gmt, $dists) = @_;
273 my $ts = eval { parse_time($date, $time, $gmt) };
277 more($self, '231 list of new newsgroups follows');
278 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
279 my $c = eval { $ng->mm->created_at } || 0;
280 next unless $c > $ts;
281 group_line($self, $ng);
286 sub wildmat2re (;$) {
287 return $_[0] = qr/.*/ if (!defined $_[0] || $_[0] eq '*');
292 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
294 my $key = sha1_hex($orig . $salt);
295 $orig =~ s/([^\w\-])+/\Q$1/g;
299 my %map = ('*' => '.*', '?' => '.' );
300 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
302 $tmp =~ s#([a-f0-9]{40})#
303 my $orig = $keep{$1};
304 defined $orig ? $orig : $1;
307 $_[0] = qr/\A$tmp\z/;
311 return $_[0] = qr/\A\z/ unless defined $_[0];
312 my %map = ('*' => '.*', ',' => '|');
313 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
314 $_[0] = qr/\A(?:$_[0])\z/;
317 sub cmd_newnews ($$$$;$$) {
318 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
319 my $ts = eval { parse_time($date, $time, $gmt) };
321 more($self, '230 list of new articles by message-id follows');
322 my ($keep, $skip) = split('!', $newsgroups, 2);
326 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
327 $ng->{newsgroup} =~ $keep or next;
328 $ng->{newsgroup} =~ $skip and next;
329 my $srch = $ng->search or next;
332 return '.' unless @srch;
334 my $opts = { limit => 1000, offset => 0 };
335 long_response($self, 0, long_response_limit, sub {
338 my $msgs = $srch->query_ts($ts, $opts);
339 if (my $nr = scalar @$msgs) {
341 join(">\r\n<", map { $_->mid } @$msgs ).
343 $opts->{offset} += $nr;
346 if (@srch) { # continue onto next newsgroup
348 } else { # break out of the long response.
349 $$i = long_response_limit;
356 my ($self, $group) = @_;
357 my $no_such = '411 no such news group';
358 my $ng = $self->{nntpd}->{groups}->{$group} or return $no_such;
361 my ($min, $max) = $ng->mm->minmax;
364 $self->{article} = $min;
365 my $est_size = $max - $min;
366 "211 $est_size $min $max $group";
369 sub article_adj ($$) {
370 my ($self, $off) = @_;
371 my $ng = $self->{ng} or return '412 no newsgroup selected';
373 my $n = $self->{article};
374 defined $n or return '420 no current article has been selected';
377 my $mid = $ng->mm->mid_for($n);
379 $n = $off > 0 ? 'next' : 'previous';
380 return "421 no $n article in this group";
382 $self->{article} = $n;
383 "223 $n <$mid> article retrieved - request text separately";
386 sub cmd_next ($) { article_adj($_[0], 1) }
387 sub cmd_last ($) { article_adj($_[0], -1) }
389 # We want to encourage using email and CC-ing everybody involved to avoid
390 # the single-point-of-failure a single server provides.
393 my $ng = $self->{ng};
394 $ng ? "440 mailto:$ng->{-primary_address} to post"
395 : '440 posting not allowed'
400 res($self, '205 closing connection - goodbye!');
405 sub header_append ($$$) {
406 my ($hdr, $k, $v) = @_;
407 my @v = $hdr->header($k);
411 $hdr->header_set($k, @v, $v);
414 sub set_nntp_headers {
415 my ($hdr, $ng, $n, $mid) = @_;
418 $hdr->header_set('Newsgroups', $ng->{newsgroup});
419 $hdr->header_set('Xref', xref($ng, $n));
420 header_append($hdr, 'List-Post', "<mailto:$ng->{-primary_address}>");
421 if (my $url = $ng->base_url) {
422 $mid = mid_escape($mid);
423 header_append($hdr, 'Archived-At', "<$url$mid/>");
424 header_append($hdr, 'List-Archive', "<$url>");
428 sub art_lookup ($$$) {
429 my ($self, $art, $set_headers) = @_;
430 my $ng = $self->{ng};
434 if ($art =~ /\A\d+\z/o) {
435 $err = '423 no such article number in this group';
438 } elsif ($art =~ /\A<([^>]+)>\z/) {
441 $n = $ng->mm->num_for($mid) if $ng;
442 goto found if defined $n;
443 foreach my $g (values %{$self->{nntpd}->{groups}}) {
444 $n = $g->mm->num_for($mid);
455 $err = '420 no current article has been selected';
456 $n = $self->{article};
457 defined $n or return $err;
459 $ng or return '412 no newsgroup has been selected';
460 $mid = $ng->mm->mid_for($n);
461 defined $mid or return $err;
464 my $smsg = $ng->search->{over_ro}->get_art($n) or return $err;
465 my $msg = $ng->msg_by_smsg($smsg) or return $err;
466 my $s = Email::Simple->new($msg);
468 set_nntp_headers($s->header_obj, $ng, $n, $mid);
471 $s->body_set('') if ($set_headers == 2);
473 [ $n, $mid, $s, $smsg->bytes, $smsg->lines, $ng ];
476 sub simple_body_write ($$) {
480 $body =~ s/^\./../smg;
481 $body =~ s/(?<!\r)\n/\r\n/sg;
482 do_more($self, $body);
483 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
488 my ($self, $art) = @_;
489 $self->{article} = $art if defined $art && $art =~ /\A\d+\z/;
493 my $hdr = $_[0]->header_obj->as_string;
498 sub cmd_article ($;$) {
499 my ($self, $art) = @_;
500 my $r = art_lookup($self, $art, 1);
501 return $r unless ref $r;
502 my ($n, $mid, $s) = @$r;
503 set_art($self, $art);
504 more($self, "220 $n <$mid> article retrieved - head and body follow");
505 do_more($self, _header($s));
506 do_more($self, "\r\n");
507 simple_body_write($self, $s);
511 my ($self, $art) = @_;
512 my $r = art_lookup($self, $art, 2);
513 return $r unless ref $r;
514 my ($n, $mid, $s) = @$r;
515 set_art($self, $art);
516 more($self, "221 $n <$mid> article retrieved - head follows");
517 do_more($self, _header($s));
522 my ($self, $art) = @_;
523 my $r = art_lookup($self, $art, 0);
524 return $r unless ref $r;
525 my ($n, $mid, $s) = @$r;
526 set_art($self, $art);
527 more($self, "222 $n <$mid> article retrieved - body follows");
528 simple_body_write($self, $s);
532 my ($self, $art) = @_;
533 my $r = art_lookup($self, $art, 0);
534 return $r unless ref $r;
535 my ($n, $mid, undef) = @$r;
536 set_art($self, $art);
537 "223 $n <$mid> article retrieved - request text separately";
540 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
542 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
546 more($self, '100 help text follows');
551 my ($self, $range) = @_;
552 my $ng = $self->{ng} or return '412 no news group has been selected';
553 defined $range or return '420 No article(s) selected';
555 my ($min, $max) = $ng->mm->minmax;
556 if ($range =~ /\A(\d+)\z/) {
558 } elsif ($range =~ /\A(\d+)-\z/) {
559 ($beg, $end) = ($1, $max);
560 } elsif ($range =~ /\A(\d+)-(\d+)\z/) {
561 ($beg, $end) = ($1, $2);
565 $beg = $min if ($beg < $min);
566 $end = $max if ($end > $max);
567 return '420 No article(s) selected' if ($beg > $end);
571 sub long_response ($$$$) {
572 my ($self, $beg, $end, $cb) = @_;
573 die "BUG: nested long response" if $self->{long_res};
575 my $fd = $self->{fd};
576 defined $fd or return;
577 # make sure we disable reading during a long response,
578 # clients should not be sending us stuff and making us do more
579 # work while we are stream a response to them
580 $self->watch_read(0);
582 $self->{long_res} = sub {
583 # limit our own running time for fairness with other
584 # clients and to avoid buffering too much:
589 eval { $cb->(\$beg) };
590 } until (($err = $@) || $self->{closed} ||
591 ++$beg > $end || !--$lim || $self->{write_buf_size});
593 if ($err || $self->{closed}) {
594 $self->{long_res} = undef;
598 "%s during long response[$fd] - %0.6f",
601 if ($self->{closed}) {
602 out($self, " deferred[$fd] aborted - %0.6f",
605 update_idle_time($self);
606 $self->watch_read(1);
608 } elsif (!$lim || $self->{write_buf_size}) {
609 # no recursion, schedule another call ASAP
610 # but only after all pending writes are done
611 update_idle_time($self);
614 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
616 $self->{long_res} = undef;
617 $self->watch_read(1);
619 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
622 $self->{long_res}->(); # kick off!
626 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
627 my ($self, $xhdr, $range) = @_;
629 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
630 my ($ng, $n) = mid_lookup($self, $1);
631 return r430 unless $n;
632 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
633 } else { # numeric range
634 $range = $self->{article} unless defined $range;
635 my $r = get_range($self, $range);
636 return $r unless ref $r;
637 my $mm = $self->{ng}->mm;
638 my ($beg, $end) = @$r;
639 more($self, $xhdr ? r221 : r225);
640 long_response($self, $beg, $end, sub {
642 my $mid = $mm->mid_for($$i);
643 more($self, "$$i <$mid>") if defined $mid;
650 "$ng->{domain} $ng->{newsgroup}:$n"
653 sub mid_lookup ($$) {
654 my ($self, $mid) = @_;
655 my $self_ng = $self->{ng};
657 my $n = $self_ng->mm->num_for($mid);
658 return ($self_ng, $n) if defined $n;
660 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
661 next if defined $self_ng && $ng eq $self_ng;
662 my $n = $ng->mm->num_for($mid);
663 return ($ng, $n) if defined $n;
668 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
669 my ($self, $xhdr, $range) = @_;
671 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
672 my ($ng, $n) = mid_lookup($self, $1);
673 return r430 unless $n;
674 hdr_mid_response($self, $xhdr, $ng, $n, $range, xref($ng, $n));
675 } else { # numeric range
676 $range = $self->{article} unless defined $range;
677 my $r = get_range($self, $range);
678 return $r unless ref $r;
679 my $ng = $self->{ng};
681 my ($beg, $end) = @$r;
682 more($self, $xhdr ? r221 : r225);
683 long_response($self, $beg, $end, sub {
685 my $mid = $mm->mid_for($$i);
686 more($self, "$$i ".xref($ng, $$i)) if defined $mid;
691 sub search_header_for {
692 my ($srch, $num, $field) = @_;
693 my $smsg = $srch->{over_ro}->get_art($num) or return;
694 return PublicInbox::SearchMsg::date($smsg) if $field eq 'date';
698 sub hdr_searchmsg ($$$$) {
699 my ($self, $xhdr, $field, $range) = @_;
700 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
701 my ($ng, $n) = mid_lookup($self, $1);
702 return r430 unless defined $n;
703 my $v = search_header_for($ng->search, $n, $field);
704 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
705 } else { # numeric range
706 $range = $self->{article} unless defined $range;
707 my $srch = $self->{ng}->search;
708 my $mm = $self->{ng}->mm;
709 my $r = get_range($self, $range);
710 return $r unless ref $r;
711 my ($beg, $end) = @$r;
712 more($self, $xhdr ? r221 : r225);
714 long_response($self, $beg, $end, sub {
716 my $msgs = $srch->query_xover($beg, $end, $off);
717 my $nr = scalar @$msgs or return;
720 foreach my $s (@$msgs) {
721 $tmp .= $s->num . ' ' . $s->$field . "\r\n";
724 do_more($self, $tmp);
725 # -1 to adjust for implicit increment in long_response
726 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
732 my ($self, $xhdr, $header, $range) = @_;
733 my $sub = lc $header;
734 if ($sub eq 'message-id') {
735 hdr_message_id($self, $xhdr, $range);
736 } elsif ($sub eq 'xref') {
737 hdr_xref($self, $xhdr, $range);
738 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
740 hdr_searchmsg($self, $xhdr, $sub, $range);
741 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
742 hdr_searchmsg($self, $xhdr, $1, $range);
744 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
750 my ($self, $header, $range) = @_;
751 do_hdr($self, 0, $header, $range);
755 sub cmd_xhdr ($$;$) {
756 my ($self, $header, $range) = @_;
757 do_hdr($self, 1, $header, $range);
760 sub hdr_mid_prefix ($$$$$) {
761 my ($self, $xhdr, $ng, $n, $mid) = @_;
762 return $mid if $xhdr;
764 # HDR for RFC 3977 users
765 if (my $self_ng = $self->{ng}) {
766 ($self_ng eq $ng) ? $n : '0';
772 sub hdr_mid_response ($$$$$$) {
773 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
776 $res .= r221 . "\r\n";
777 $res .= "$mid $v\r\n";
779 $res .= r225 . "\r\n";
780 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
781 $res .= "$pfx $v\r\n";
783 res($self, $res .= '.');
787 sub cmd_xrover ($;$) {
788 my ($self, $range) = @_;
789 my $ng = $self->{ng} or return '412 no newsgroup selected';
790 (defined $range && $range =~ /[<>]/) and
791 return '420 No article(s) selected'; # no message IDs
793 $range = $self->{article} unless defined $range;
794 my $r = get_range($self, $range);
795 return $r unless ref $r;
796 my ($beg, $end) = @$r;
798 my $srch = $ng->search;
799 more($self, '224 Overview information follows');
800 long_response($self, $beg, $end, sub {
803 my $h = search_header_for($srch, $num, 'references');
804 defined $h or return;
805 more($self, "$num $h");
810 my ($num, $smsg) = @_;
811 # n.b. field access and procedural calls can be
812 # 10%-15% faster than OO method calls:
813 my $s = join("\t", $num,
816 PublicInbox::SearchMsg::date($smsg),
826 my ($self, $range) = @_;
827 if ($range && $range =~ /\A<(.+)>\z/) {
828 my ($ng, $n) = mid_lookup($self, $1);
829 defined $n or return r430;
830 my $smsg = $ng->search->{over_ro}->get_art($n) or return r430;
831 more($self, '224 Overview information follows (multi-line)');
833 # Only set article number column if it's the current group
834 my $self_ng = $self->{ng};
835 $n = 0 if (!$self_ng || $self_ng ne $ng);
836 more($self, over_line($n, $smsg));
839 cmd_xover($self, $range);
843 sub cmd_xover ($;$) {
844 my ($self, $range) = @_;
845 $range = $self->{article} unless defined $range;
846 my $r = get_range($self, $range);
847 return $r unless ref $r;
848 my ($beg, $end) = @$r;
849 more($self, "224 Overview information follows for $beg to $end");
850 my $srch = $self->{ng}->search;
852 long_response($self, $beg, $end, sub {
854 my $msgs = $srch->query_xover($beg, $end, $off);
855 my $nr = scalar @$msgs or return;
859 more($self, join("\r\n", map {
860 over_line($_->{num}, $_);
863 # -1 to adjust for implicit increment in long_response
864 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
869 my ($self, $mid) = @_;
870 return r501 unless $mid =~ /\A<(.+)>\z/;
873 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
874 my $n = $ng->mm->num_for($mid);
875 push @paths, "$ng->{newsgroup}/$n" if defined $n;
877 return '430 no such article on server' unless @paths;
878 '223 '.join(' ', @paths);
882 my ($self, $line) = @_;
883 do_write($self, $line . "\r\n");
887 my ($self, $line) = @_;
888 do_more($self, $line . "\r\n");
892 my ($self, $data) = @_;
893 my $done = $self->write($data);
894 return if $self->{closed};
896 # Do not watch for readability if we have data in the queue,
897 # instead re-enable watching for readability when we can
898 $self->watch_read(0) if (!$done || $self->{long_res});
904 my ($self, $fmt, @args) = @_;
905 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
909 my ($self, $fmt, @args) = @_;
910 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
913 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
916 my ($self, $data) = @_;
917 if (MSG_MORE && !$self->{write_buf_size}) {
918 my $n = send($self->{sock}, $data, MSG_MORE);
920 my $dlen = length($data);
921 return 1 if $n == $dlen; # all done!
922 $data = substr($data, $n, $dlen - $n);
925 do_write($self, $data);
928 # callbacks for Danga::Socket
930 sub event_hup { $_[0]->close }
931 sub event_err { $_[0]->close }
935 update_idle_time($self);
936 # only continue watching for readability when we are done writing:
937 if ($self->write(undef) == 1 && !$self->{long_res}) {
938 $self->watch_read(1);
944 use constant LINE_MAX => 512; # RFC 977 section 2.3
947 my $buf = $self->read(LINE_MAX) or return $self->close;
948 $self->{rbuf} .= $$buf;
949 while ($r > 0 && $self->{rbuf} =~ s/\A\s*([^\r\n]+)\r?\n//) {
951 return $self->close if $line =~ /[[:cntrl:]]/s;
953 my $fd = $self->{fd};
954 $r = eval { process_line($self, $line) };
955 my $d = $self->{long_res} ?
956 " deferred[$fd]" : '';
957 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
960 return $self->close if $r < 0;
961 my $len = length($self->{rbuf});
962 return $self->close if ($len >= LINE_MAX);
963 update_idle_time($self);
967 my ($self, $bool) = @_;
968 my $rv = $self->SUPER::watch_read($bool);
969 if ($bool && $self->{rbuf} ne '') {
970 # Force another read if there is a pipelined request.
971 # We don't know if the socket has anything for us to read,
972 # and we must double-check again by the time the timer fires
973 # in case we really did dispatch a read event and started
974 # another long response.
976 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
981 sub not_idle_long ($$) {
982 my ($self, $now) = @_;
983 defined(my $fd = $self->{fd}) or return;
984 my $ary = $EXPMAP->{$fd} or return;
985 my $exp_at = $ary->[0] + $EXPTIME;
989 # for graceful shutdown in PublicInbox::Daemon:
991 my ($self, $now) = @_;
992 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size} ||
993 not_idle_long($self, $now));