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 use PublicInbox::MID qw(mid2path);
14 require PublicInbox::EvCleanup;
16 use POSIX qw(strftime);
17 use Time::HiRes qw(clock_gettime CLOCK_MONOTONIC);
18 use URI::Escape qw(uri_escape_utf8);
19 use Encode qw(find_encoding);
20 my $enc_utf8 = find_encoding('UTF-8');
22 r501 => '501 command syntax error',
23 r221 => '221 Header follows',
24 r224 => '224 Overview information follows (multi-line)',
25 r225 => '225 Headers follow (multi-line)',
26 r430 => '430 No article with that message-id',
27 long_response_limit => 0xffffffff,
30 sub now () { clock_gettime(CLOCK_MONOTONIC) };
32 my @OVERVIEW = qw(Subject From Date Message-ID References);
33 my $OVERVIEW_FMT = join(":\r\n", @OVERVIEW, qw(Bytes Lines)) . ":\r\n";
34 my $LIST_HEADERS = join("\r\n", @OVERVIEW,
35 qw(:bytes :lines Xref To Cc)) . "\r\n";
37 # disable commands with easy DoS potential:
38 # LISTGROUP could get pretty bad, too...
39 my %DISABLED; # = map { $_ => 1 } qw(xover list_overview_fmt newnews xhdr);
41 my $EXPMAP; # fd -> [ idle_time, $self ]
43 our $EXPTIME = 180; # 3 minutes
44 my $WEAKEN = {}; # string(nntpd) -> nntpd
53 foreach my $nntp (@$q) {
54 # for request && response protocols, always finish writing
55 # before finishing reading:
56 if (my $long_cb = $nntp->{long_res}) {
57 $nntp->write($long_cb);
58 } elsif (&Danga::Socket::POLLIN & $nntp->{event_watch}) {
64 sub update_idle_time ($) {
66 my $tmp = $self->{sock} or return;
68 defined $tmp and $EXPMAP->{$tmp} = [ now(), $self ];
71 # reduce FD pressure by closing some "git cat-file --batch" processes
72 # and unused FDs for msgmap and Xapian indices
73 sub weaken_groups () {
75 foreach my $nntpd (values %$WEAKEN) {
76 $_->weaken_all foreach (@{$nntpd->{grouplist}});
84 my $old = $now - $exp;
87 while (my ($fd, $v) = each %$EXPMAP) {
88 my ($idle_time, $nntp) = @$v;
89 if ($idle_time < $old) {
90 $nntp->close; # idempotent
98 $expt = PublicInbox::EvCleanup::later(*expire_old);
102 # noop to kick outselves out of the loop ASAP so descriptors
104 PublicInbox::EvCleanup::asap(sub {});
106 # grace period for reaping resources
107 $weakt ||= PublicInbox::EvCleanup::later(*weaken_groups);
112 my ($class, $sock, $nntpd) = @_;
113 my $self = fields::new($class);
114 $self->SUPER::new($sock);
115 $self->{nntpd} = $nntpd;
116 res($self, '201 server ready - post via email');
118 $self->watch_read(1);
119 update_idle_time($self);
120 $WEAKEN->{"$nntpd"} = $nntpd;
121 $expt ||= PublicInbox::EvCleanup::later(*expire_old);
126 my ($cb, $argc) = @_;
127 my $tot = prototype $cb;
128 my ($nreq, undef) = split(';', $tot);
129 $nreq = ($nreq =~ tr/$//) - 1;
130 $tot = ($tot =~ tr/$//) - 1;
131 ($argc <= $tot && $argc >= $nreq);
134 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
135 sub process_line ($$) {
137 my ($req, @args) = split(/\s+/, $l);
141 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
143 return res($self, '500 command not recognized') unless $req;
144 return res($self, r501) unless args_ok($req, scalar @args);
146 my $res = eval { $req->($self, @args) };
148 if ($err && !$self->{closed}) {
150 err($self, 'error from: %s (%s)', $l, $err);
151 $res = '503 program fault - command not performed';
153 return 0 unless defined $res;
158 my ($self, $arg) = @_;
160 return r501 unless $arg eq 'READER';
161 '201 Posting prohibited';
164 sub cmd_slave ($) { '202 slave status noted' }
166 sub cmd_xgtitle ($;$) {
167 my ($self, $wildmat) = @_;
168 more($self, '282 list of groups and descriptions follows');
169 list_newsgroups($self, $wildmat);
173 sub list_overview_fmt ($) {
175 do_more($self, $OVERVIEW_FMT);
178 sub list_headers ($;$) {
180 do_more($self, $LIST_HEADERS);
183 sub list_active ($;$) {
184 my ($self, $wildmat) = @_;
185 wildmat2re($wildmat);
186 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
187 $ng->{newsgroup} =~ $wildmat or next;
188 group_line($self, $ng);
192 sub list_active_times ($;$) {
193 my ($self, $wildmat) = @_;
194 wildmat2re($wildmat);
195 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
196 $ng->{newsgroup} =~ $wildmat or next;
197 my $c = eval { $ng->mm->created_at } || time;
198 more($self, "$ng->{newsgroup} $c $ng->{address}");
202 sub list_newsgroups ($;$) {
203 my ($self, $wildmat) = @_;
204 wildmat2re($wildmat);
205 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
206 $ng->{newsgroup} =~ $wildmat or next;
207 my $d = $ng->description;
208 more($self, "$ng->{newsgroup} $d");
212 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
213 sub cmd_list ($;$$) {
214 my ($self, @args) = @_;
216 my $arg = shift @args;
217 $arg =~ tr/A-Z./a-z_/;
219 return r501 if $DISABLED{$arg};
225 return r501 unless $arg && args_ok($arg, scalar @args);
226 more($self, '215 information follows');
227 $arg->($self, @args);
229 more($self, '215 list of newsgroups follows');
230 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
231 group_line($self, $ng);
237 sub cmd_listgroup ($;$) {
238 my ($self, $group) = @_;
239 if (defined $group) {
240 my $res = cmd_group($self, $group);
241 return $res if ($res !~ /\A211 /);
245 $self->{ng} or return '412 no newsgroup selected';
246 long_response($self, 0, long_response_limit, sub {
248 my $nr = $self->{ng}->mm->id_batch($$i, sub {
250 more($self, join("\r\n", @$ary));
253 # -1 to adjust for implicit increment in long_response
254 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
258 sub parse_time ($$;$) {
259 my ($date, $time, $gmt) = @_;
260 use Time::Local qw();
261 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
263 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt";
266 my @now = $gmt ? gmtime : localtime;
267 my ($YYYY, $MM, $DD);
268 if (length($date) == 8) { # RFC 3977 allows YYYYMMDD
269 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
270 } else { # legacy clients send YYMMDD
271 ($YYYY, $MM, $DD) = unpack('A2A2A2', $date);
272 if ($YYYY > strftime('%y', @now)) {
273 my $cur_year = $now[5] + 1900;
274 $YYYY += int($cur_year / 1000) * 1000 - 100;
278 Time::Local::timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
280 Time::Local::timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
284 sub group_line ($$) {
285 my ($self, $ng) = @_;
286 my ($min, $max) = $ng->mm->minmax;
287 more($self, "$ng->{newsgroup} $max $min n") if defined $min && defined $max;
290 sub cmd_newgroups ($$$;$$) {
291 my ($self, $date, $time, $gmt, $dists) = @_;
292 my $ts = eval { parse_time($date, $time, $gmt) };
296 more($self, '231 list of new newsgroups follows');
297 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
298 my $c = eval { $ng->mm->created_at } || 0;
299 next unless $c > $ts;
300 group_line($self, $ng);
305 sub wildmat2re (;$) {
306 return $_[0] = qr/.*/ if (!defined $_[0] || $_[0] eq '*');
309 use Digest::SHA qw(sha1_hex);
312 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
314 my $key = sha1_hex($orig . $salt);
315 $orig =~ s/([^\w\-])+/\Q$1/g;
319 my %map = ('*' => '.*', '?' => '.' );
320 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
322 $tmp =~ s#([a-f0-9]{40})#
323 my $orig = $keep{$1};
324 defined $orig ? $orig : $1;
327 $_[0] = qr/\A$tmp\z/;
331 return $_[0] = qr/\A\z/ unless defined $_[0];
332 my %map = ('*' => '.*', ',' => '|');
333 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
334 $_[0] = qr/\A(?:$_[0])\z/;
337 sub cmd_newnews ($$$$;$$) {
338 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
339 my $ts = eval { parse_time($date, $time, $gmt) };
341 more($self, '230 list of new articles by message-id follows');
342 my ($keep, $skip) = split('!', $newsgroups, 2);
346 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
347 $ng->{newsgroup} =~ $keep or next;
348 $ng->{newsgroup} =~ $skip and next;
349 my $srch = $ng->search or next;
352 return '.' unless @srch;
355 my $opts = { asc => 1, limit => 1000, offset => 0 };
356 long_response($self, 0, long_response_limit, sub {
359 my $res = $srch->query($ts, $opts);
360 my $msgs = $res->{msgs};
361 if (my $nr = scalar @$msgs) {
363 join(">\r\n<", map { $_->mid } @$msgs ).
365 $opts->{offset} += $nr;
368 if (@srch) { # continue onto next newsgroup
370 } else { # break out of the long response.
371 $$i = long_response_limit;
378 my ($self, $group) = @_;
379 my $no_such = '411 no such news group';
380 my $ng = $self->{nntpd}->{groups}->{$group} or return $no_such;
383 my ($min, $max) = $ng->mm->minmax;
386 $self->{article} = $min;
387 my $est_size = $max - $min;
388 "211 $est_size $min $max $group";
391 sub article_adj ($$) {
392 my ($self, $off) = @_;
393 my $ng = $self->{ng} or return '412 no newsgroup selected';
395 my $n = $self->{article};
396 defined $n or return '420 no current article has been selected';
399 my $mid = $ng->mm->mid_for($n);
401 $n = $off > 0 ? 'next' : 'previous';
402 return "421 no $n article in this group";
404 $self->{article} = $n;
405 "223 $n <$mid> article retrieved - request text separately";
408 sub cmd_next ($) { article_adj($_[0], 1) }
409 sub cmd_last ($) { article_adj($_[0], -1) }
411 # We want to encourage using email and CC-ing everybody involved to avoid
412 # the single-point-of-failure a single server provides.
415 my $ng = $self->{ng};
416 $ng ? "440 mailto:$ng->{address} to post" : '440 posting not allowed'
421 res($self, '205 closing connection - goodbye!');
426 sub header_append ($$$) {
427 my ($hdr, $k, $v) = @_;
428 my @v = $hdr->header($k);
432 $hdr->header_set($k, @v, $v);
435 sub set_nntp_headers {
436 my ($hdr, $ng, $n, $mid) = @_;
439 $hdr->header_set('Newsgroups', $ng->{newsgroup});
440 $hdr->header_set('Xref', xref($ng, $n));
441 header_append($hdr, 'List-Post', "<mailto:$ng->{address}>");
442 if (my $url = $ng->{url}) {
443 $mid = uri_escape_utf8($mid);
444 header_append($hdr, 'Archived-At', "<$url$mid/>");
445 header_append($hdr, 'List-Archive', "<$url>");
449 sub art_lookup ($$$) {
450 my ($self, $art, $set_headers) = @_;
451 my $ng = $self->{ng};
455 if ($art =~ /\A\d+\z/o) {
456 $err = '423 no such article number in this group';
459 } elsif ($art =~ /\A<([^>]+)>\z/) {
462 $n = $ng->mm->num_for($mid) if $ng;
463 goto found if defined $n;
464 foreach my $g (values %{$self->{nntpd}->{groups}}) {
465 $n = $g->mm->num_for($mid);
476 $err = '420 no current article has been selected';
477 $n = $self->{article};
478 defined $n or return $err;
480 $ng or return '412 no newsgroup has been selected';
481 $mid = $ng->mm->mid_for($n);
482 defined $mid or return $err;
485 my $o = 'HEAD:' . mid2path($mid);
487 my $s = eval { Email::Simple->new($ng->gcf->cat_file($o, \$bytes)) };
488 return $err unless $s;
491 set_nntp_headers($s->header_obj, $ng, $n, $mid);
492 $lines = $s->body =~ tr!\n!\n!;
495 $s->body_set('') if ($set_headers == 2);
497 [ $n, $mid, $s, $bytes, $lines, $ng ];
500 sub simple_body_write ($$) {
504 $body =~ s/^\./../smg;
505 $body =~ s/(?<!\r)\n/\r\n/sg;
506 do_more($self, $body);
507 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
512 my ($self, $art) = @_;
513 $self->{article} = $art if defined $art && $art =~ /\A\d+\z/;
516 sub cmd_article ($;$) {
517 my ($self, $art) = @_;
518 my $r = art_lookup($self, $art, 1);
519 return $r unless ref $r;
520 my ($n, $mid, $s) = @$r;
521 set_art($self, $art);
522 more($self, "220 $n <$mid> article retrieved - head and body follow");
523 do_more($self, $s->header_obj->as_string);
524 do_more($self, "\r\n");
525 simple_body_write($self, $s);
529 my ($self, $art) = @_;
530 my $r = art_lookup($self, $art, 2);
531 return $r unless ref $r;
532 my ($n, $mid, $s) = @$r;
533 set_art($self, $art);
534 more($self, "221 $n <$mid> article retrieved - head follows");
535 do_more($self, $s->header_obj->as_string);
540 my ($self, $art) = @_;
541 my $r = art_lookup($self, $art, 0);
542 return $r unless ref $r;
543 my ($n, $mid, $s) = @$r;
544 set_art($self, $art);
545 more($self, "222 $n <$mid> article retrieved - body follows");
546 simple_body_write($self, $s);
550 my ($self, $art) = @_;
551 my $r = art_lookup($self, $art, 0);
552 return $r unless ref $r;
553 my ($n, $mid, undef) = @$r;
554 set_art($self, $art);
555 "223 $n <$mid> article retrieved - request text separately";
558 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
560 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
564 more($self, '100 help text follows');
569 my ($self, $range) = @_;
570 my $ng = $self->{ng} or return '412 no news group has been selected';
571 defined $range or return '420 No article(s) selected';
573 my ($min, $max) = $ng->mm->minmax;
574 if ($range =~ /\A(\d+)\z/) {
576 } elsif ($range =~ /\A(\d+)-\z/) {
577 ($beg, $end) = ($1, $max);
578 } elsif ($range =~ /\A(\d+)-(\d+)\z/) {
579 ($beg, $end) = ($1, $2);
583 $beg = $min if ($beg < $min);
584 $end = $max if ($end > $max);
585 return '420 No article(s) selected' if ($beg > $end);
589 sub long_response ($$$$) {
590 my ($self, $beg, $end, $cb) = @_;
591 die "BUG: nested long response" if $self->{long_res};
593 my $fd = $self->{fd};
594 defined $fd or return;
595 # make sure we disable reading during a long response,
596 # clients should not be sending us stuff and making us do more
597 # work while we are stream a response to them
598 $self->watch_read(0);
600 $self->{long_res} = sub {
601 # limit our own running time for fairness with other
602 # clients and to avoid buffering too much:
607 eval { $cb->(\$beg) };
608 } until (($err = $@) || $self->{closed} ||
609 ++$beg > $end || !--$lim || $self->{write_buf_size});
611 if ($err || $self->{closed}) {
612 $self->{long_res} = undef;
616 "%s during long response[$fd] - %0.6f",
619 if ($self->{closed}) {
620 out($self, " deferred[$fd] aborted - %0.6f",
623 update_idle_time($self);
624 $self->watch_read(1);
626 } elsif (!$lim || $self->{write_buf_size}) {
627 # no recursion, schedule another call ASAP
628 # but only after all pending writes are done
629 update_idle_time($self);
632 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
634 $self->{long_res} = undef;
635 $self->watch_read(1);
637 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
640 $self->{long_res}->(); # kick off!
644 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
645 my ($self, $xhdr, $range) = @_;
647 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
648 my ($ng, $n) = mid_lookup($self, $1);
649 return r430 unless $n;
650 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
651 } else { # numeric range
652 $range = $self->{article} unless defined $range;
653 my $r = get_range($self, $range);
654 return $r unless ref $r;
655 my $mm = $self->{ng}->mm;
656 my ($beg, $end) = @$r;
657 more($self, $xhdr ? r221 : r225);
658 long_response($self, $beg, $end, sub {
660 my $mid = $mm->mid_for($$i);
661 more($self, "$$i <$mid>") if defined $mid;
668 "$ng->{domain} $ng->{newsgroup}:$n"
671 sub mid_lookup ($$) {
672 my ($self, $mid) = @_;
673 my $self_ng = $self->{ng};
675 my $n = $self_ng->mm->num_for($mid);
676 return ($self_ng, $n) if defined $n;
678 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
679 next if defined $self_ng && $ng eq $self_ng;
680 my $n = $ng->mm->num_for($mid);
681 return ($ng, $n) if defined $n;
686 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
687 my ($self, $xhdr, $range) = @_;
689 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
690 my ($ng, $n) = mid_lookup($self, $1);
691 return r430 unless $n;
692 hdr_mid_response($self, $xhdr, $ng, $n, $range, xref($ng, $n));
693 } else { # numeric range
694 $range = $self->{article} unless defined $range;
695 my $r = get_range($self, $range);
696 return $r unless ref $r;
697 my $ng = $self->{ng};
699 my ($beg, $end) = @$r;
700 more($self, $xhdr ? r221 : r225);
701 long_response($self, $beg, $end, sub {
703 my $mid = $mm->mid_for($$i);
704 more($self, "$$i ".xref($ng, $$i)) if defined $mid;
709 sub search_header_for {
710 my ($srch, $mid, $field) = @_;
711 my $smsg = $srch->lookup_message($mid) or return;
712 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
716 sub hdr_searchmsg ($$$$) {
717 my ($self, $xhdr, $field, $range) = @_;
718 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
719 my ($ng, $n) = mid_lookup($self, $1);
720 return r430 unless $n;
721 my $v = search_header_for($ng->search, $range, $field);
722 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
723 } else { # numeric range
724 $range = $self->{article} unless defined $range;
725 my $srch = $self->{ng}->search;
726 my $mm = $self->{ng}->mm;
727 my $r = get_range($self, $range);
728 return $r unless ref $r;
729 my ($beg, $end) = @$r;
730 more($self, $xhdr ? r221 : r225);
732 long_response($self, $beg, $end, sub {
734 my $res = $srch->query_xover($beg, $end, $off);
735 my $msgs = $res->{msgs};
736 my $nr = scalar @$msgs or return;
739 foreach my $s (@$msgs) {
740 $tmp .= $s->num . ' ' . $s->$field . "\r\n";
742 do_more($self, $tmp);
743 # -1 to adjust for implicit increment in long_response
744 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
750 my ($self, $xhdr, $header, $range) = @_;
751 my $sub = lc $header;
752 if ($sub eq 'message-id') {
753 hdr_message_id($self, $xhdr, $range);
754 } elsif ($sub eq 'xref') {
755 hdr_xref($self, $xhdr, $range);
756 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
758 hdr_searchmsg($self, $xhdr, $sub, $range);
759 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
760 hdr_searchmsg($self, $xhdr, $1, $range);
762 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
768 my ($self, $header, $range) = @_;
769 do_hdr($self, 0, $header, $range);
773 sub cmd_xhdr ($$;$) {
774 my ($self, $header, $range) = @_;
775 do_hdr($self, 1, $header, $range);
778 sub hdr_mid_prefix ($$$$$) {
779 my ($self, $xhdr, $ng, $n, $mid) = @_;
780 return $mid if $xhdr;
782 # HDR for RFC 3977 users
783 if (my $self_ng = $self->{ng}) {
784 ($self_ng eq $ng) ? $n : '0';
790 sub hdr_mid_response ($$$$$$) {
791 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
794 $res .= r221 . "\r\n";
795 $res .= "$mid $v\r\n";
797 $res .= r225 . "\r\n";
798 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
799 $res .= "$pfx $v\r\n";
801 res($self, $res .= '.');
805 sub cmd_xrover ($;$) {
806 my ($self, $range) = @_;
807 my $ng = $self->{ng} or return '412 no newsgroup selected';
808 (defined $range && $range =~ /[<>]/) and
809 return '420 No article(s) selected'; # no message IDs
811 $range = $self->{article} unless defined $range;
812 my $r = get_range($self, $range);
813 return $r unless ref $r;
814 my ($beg, $end) = @$r;
816 my $srch = $ng->search;
817 more($self, '224 Overview information follows');
818 long_response($self, $beg, $end, sub {
820 my $mid = $mm->mid_for($$i) or return;
821 my $h = search_header_for($srch, $mid, 'references');
822 more($self, "$$i $h");
827 my ($num, $smsg) = @_;
828 # n.b. field access and procedural calls can be
829 # 10%-15% faster than OO method calls:
833 PublicInbox::SearchMsg::date($smsg),
834 '<'.PublicInbox::SearchMsg::mid($smsg).'>',
836 PublicInbox::SearchMsg::bytes($smsg),
837 PublicInbox::SearchMsg::lines($smsg));
841 my ($self, $range) = @_;
842 if ($range && $range =~ /\A<(.+)>\z/) {
843 my ($ng, $n) = mid_lookup($self, $1);
844 my $smsg = $ng->search->lookup_message($range) or
845 return '430 No article with that message-id';
846 more($self, '224 Overview information follows (multi-line)');
847 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
849 # Only set article number column if it's the current group
850 my $self_ng = $self->{ng};
851 $n = 0 if (!$self_ng || $self_ng ne $ng);
852 more($self, over_line($n, $smsg));
855 cmd_xover($self, $range);
859 sub cmd_xover ($;$) {
860 my ($self, $range) = @_;
861 $range = $self->{article} unless defined $range;
862 my $r = get_range($self, $range);
863 return $r unless ref $r;
864 my ($beg, $end) = @$r;
865 more($self, "224 Overview information follows for $beg to $end");
866 my $srch = $self->{ng}->search;
868 long_response($self, $beg, $end, sub {
870 my $res = $srch->query_xover($beg, $end, $off);
871 my $msgs = $res->{msgs};
872 my $nr = scalar @$msgs or return;
876 more($self, join("\r\n", map {
877 over_line(PublicInbox::SearchMsg::num($_), $_);
880 # -1 to adjust for implicit increment in long_response
881 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
886 my ($self, $mid) = @_;
887 return r501 unless $mid =~ /\A<(.+)>\z/;
890 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
891 my $n = $ng->mm->num_for($mid);
892 push @paths, "$ng->{newsgroup}/$n" if defined $n;
894 return '430 no such article on server' unless @paths;
895 '223 '.join(' ', @paths);
899 my ($self, $line) = @_;
900 $line = $enc_utf8->encode($line);
901 do_write($self, $line . "\r\n");
905 my ($self, $line) = @_;
906 do_more($self, $line . "\r\n");
910 my ($self, $data) = @_;
911 my $done = $self->write($data);
912 die if $self->{closed};
914 # Do not watch for readability if we have data in the queue,
915 # instead re-enable watching for readability when we can
916 $self->watch_read(0) if (!$done || $self->{long_res});
922 my ($self, $fmt, @args) = @_;
923 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
927 my ($self, $fmt, @args) = @_;
928 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
931 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
934 my ($self, $data) = @_;
935 $data = $enc_utf8->encode($data);
936 if (MSG_MORE && !$self->{write_buf_size}) {
937 my $n = send($self->{sock}, $data, MSG_MORE);
939 my $dlen = length($data);
940 return 1 if $n == $dlen; # all done!
941 $data = substr($data, $n, $dlen - $n);
944 do_write($self, $data);
947 # callbacks for Danga::Socket
949 sub event_hup { $_[0]->close }
950 sub event_err { $_[0]->close }
954 update_idle_time($self);
955 # only continue watching for readability when we are done writing:
956 if ($self->write(undef) == 1 && !$self->{long_res}) {
957 $self->watch_read(1);
963 use constant LINE_MAX => 512; # RFC 977 section 2.3
966 my $buf = $self->read(LINE_MAX) or return $self->close;
967 $self->{rbuf} .= $$buf;
968 while ($r > 0 && $self->{rbuf} =~ s/\A\s*([^\r\n]+)\r?\n//) {
970 return $self->close if $line =~ /[[:cntrl:]]/s;
972 my $fd = $self->{fd};
973 $r = eval { process_line($self, $line) };
974 my $d = $self->{long_res} ?
975 " deferred[$fd]" : '';
976 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
979 return $self->close if $r < 0;
980 my $len = length($self->{rbuf});
981 return $self->close if ($len >= LINE_MAX);
982 update_idle_time($self);
986 my ($self, $bool) = @_;
987 my $rv = $self->SUPER::watch_read($bool);
988 if ($bool && $self->{rbuf} ne '') {
989 # Force another read if there is a pipelined request.
990 # We don't know if the socket has anything for us to read,
991 # and we must double-check again by the time the timer fires
992 # in case we really did dispatch a read event and started
993 # another long response.
995 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
1000 # for graceful shutdown in PublicInbox::Daemon:
1003 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size});