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 ($$) {
137 my ($req, @args) = split(/\s+/, $l);
141 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
143 return res($self, '500 command not recognized') unless $req;
144 return res($self, r501) unless args_ok($req, scalar @args);
146 my $res = eval { $req->($self, @args) };
148 if ($err && !$self->{closed}) {
150 err($self, 'error from: %s (%s)', $l, $err);
151 $res = '503 program fault - command not performed';
153 return 0 unless defined $res;
158 my ($self, $arg) = @_;
160 return r501 unless $arg eq 'READER';
161 '201 Posting prohibited';
164 sub cmd_slave ($) { '202 slave status noted' }
166 sub cmd_xgtitle ($;$) {
167 my ($self, $wildmat) = @_;
168 more($self, '282 list of groups and descriptions follows');
169 list_newsgroups($self, $wildmat);
173 sub list_overview_fmt ($) {
175 do_more($self, $OVERVIEW_FMT);
178 sub list_headers ($;$) {
180 do_more($self, $LIST_HEADERS);
183 sub list_active ($;$) {
184 my ($self, $wildmat) = @_;
185 wildmat2re($wildmat);
186 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
187 $ng->{newsgroup} =~ $wildmat or next;
188 group_line($self, $ng);
192 sub list_active_times ($;$) {
193 my ($self, $wildmat) = @_;
194 wildmat2re($wildmat);
195 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
196 $ng->{newsgroup} =~ $wildmat or next;
197 my $c = eval { $ng->mm->created_at } || time;
198 more($self, "$ng->{newsgroup} $c $ng->{-primary_address}");
202 sub list_newsgroups ($;$) {
203 my ($self, $wildmat) = @_;
204 wildmat2re($wildmat);
205 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
206 $ng->{newsgroup} =~ $wildmat or next;
207 my $d = $ng->description;
208 more($self, "$ng->{newsgroup} $d");
212 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
213 sub cmd_list ($;$$) {
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->{-primary_address} to post"
417 : '440 posting not allowed'
422 res($self, '205 closing connection - goodbye!');
427 sub header_append ($$$) {
428 my ($hdr, $k, $v) = @_;
429 my @v = $hdr->header($k);
433 $hdr->header_set($k, @v, $v);
436 sub set_nntp_headers {
437 my ($hdr, $ng, $n, $mid) = @_;
440 $hdr->header_set('Newsgroups', $ng->{newsgroup});
441 $hdr->header_set('Xref', xref($ng, $n));
442 header_append($hdr, 'List-Post', "<mailto:$ng->{-primary_address}>");
443 if (my $url = $ng->base_url) {
444 $mid = uri_escape_utf8($mid);
445 header_append($hdr, 'Archived-At', "<$url$mid/>");
446 header_append($hdr, 'List-Archive', "<$url>");
450 sub art_lookup ($$$) {
451 my ($self, $art, $set_headers) = @_;
452 my $ng = $self->{ng};
456 if ($art =~ /\A\d+\z/o) {
457 $err = '423 no such article number in this group';
460 } elsif ($art =~ /\A<([^>]+)>\z/) {
463 $n = $ng->mm->num_for($mid) if $ng;
464 goto found if defined $n;
465 foreach my $g (values %{$self->{nntpd}->{groups}}) {
466 $n = $g->mm->num_for($mid);
477 $err = '420 no current article has been selected';
478 $n = $self->{article};
479 defined $n or return $err;
481 $ng or return '412 no newsgroup has been selected';
482 $mid = $ng->mm->mid_for($n);
483 defined $mid or return $err;
486 my $o = 'HEAD:' . mid2path($mid);
488 my $s = eval { Email::Simple->new($ng->gcf->cat_file($o, \$bytes)) };
489 return $err unless $s;
492 set_nntp_headers($s->header_obj, $ng, $n, $mid);
493 $lines = $s->body =~ tr!\n!\n!;
496 $s->body_set('') if ($set_headers == 2);
498 [ $n, $mid, $s, $bytes, $lines, $ng ];
501 sub simple_body_write ($$) {
505 $body =~ s/^\./../smg;
506 $body =~ s/(?<!\r)\n/\r\n/sg;
507 do_more($self, $body);
508 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
513 my ($self, $art) = @_;
514 $self->{article} = $art if defined $art && $art =~ /\A\d+\z/;
517 sub cmd_article ($;$) {
518 my ($self, $art) = @_;
519 my $r = art_lookup($self, $art, 1);
520 return $r unless ref $r;
521 my ($n, $mid, $s) = @$r;
522 set_art($self, $art);
523 more($self, "220 $n <$mid> article retrieved - head and body follow");
524 do_more($self, $s->header_obj->as_string);
525 do_more($self, "\r\n");
526 simple_body_write($self, $s);
530 my ($self, $art) = @_;
531 my $r = art_lookup($self, $art, 2);
532 return $r unless ref $r;
533 my ($n, $mid, $s) = @$r;
534 set_art($self, $art);
535 more($self, "221 $n <$mid> article retrieved - head follows");
536 do_more($self, $s->header_obj->as_string);
541 my ($self, $art) = @_;
542 my $r = art_lookup($self, $art, 0);
543 return $r unless ref $r;
544 my ($n, $mid, $s) = @$r;
545 set_art($self, $art);
546 more($self, "222 $n <$mid> article retrieved - body follows");
547 simple_body_write($self, $s);
551 my ($self, $art) = @_;
552 my $r = art_lookup($self, $art, 0);
553 return $r unless ref $r;
554 my ($n, $mid, undef) = @$r;
555 set_art($self, $art);
556 "223 $n <$mid> article retrieved - request text separately";
559 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
561 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
565 more($self, '100 help text follows');
570 my ($self, $range) = @_;
571 my $ng = $self->{ng} or return '412 no news group has been selected';
572 defined $range or return '420 No article(s) selected';
574 my ($min, $max) = $ng->mm->minmax;
575 if ($range =~ /\A(\d+)\z/) {
577 } elsif ($range =~ /\A(\d+)-\z/) {
578 ($beg, $end) = ($1, $max);
579 } elsif ($range =~ /\A(\d+)-(\d+)\z/) {
580 ($beg, $end) = ($1, $2);
584 $beg = $min if ($beg < $min);
585 $end = $max if ($end > $max);
586 return '420 No article(s) selected' if ($beg > $end);
590 sub long_response ($$$$) {
591 my ($self, $beg, $end, $cb) = @_;
592 die "BUG: nested long response" if $self->{long_res};
594 my $fd = $self->{fd};
595 defined $fd or return;
596 # make sure we disable reading during a long response,
597 # clients should not be sending us stuff and making us do more
598 # work while we are stream a response to them
599 $self->watch_read(0);
601 $self->{long_res} = sub {
602 # limit our own running time for fairness with other
603 # clients and to avoid buffering too much:
608 eval { $cb->(\$beg) };
609 } until (($err = $@) || $self->{closed} ||
610 ++$beg > $end || !--$lim || $self->{write_buf_size});
612 if ($err || $self->{closed}) {
613 $self->{long_res} = undef;
617 "%s during long response[$fd] - %0.6f",
620 if ($self->{closed}) {
621 out($self, " deferred[$fd] aborted - %0.6f",
624 update_idle_time($self);
625 $self->watch_read(1);
627 } elsif (!$lim || $self->{write_buf_size}) {
628 # no recursion, schedule another call ASAP
629 # but only after all pending writes are done
630 update_idle_time($self);
633 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
635 $self->{long_res} = undef;
636 $self->watch_read(1);
638 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
641 $self->{long_res}->(); # kick off!
645 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
646 my ($self, $xhdr, $range) = @_;
648 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
649 my ($ng, $n) = mid_lookup($self, $1);
650 return r430 unless $n;
651 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
652 } else { # numeric range
653 $range = $self->{article} unless defined $range;
654 my $r = get_range($self, $range);
655 return $r unless ref $r;
656 my $mm = $self->{ng}->mm;
657 my ($beg, $end) = @$r;
658 more($self, $xhdr ? r221 : r225);
659 long_response($self, $beg, $end, sub {
661 my $mid = $mm->mid_for($$i);
662 more($self, "$$i <$mid>") if defined $mid;
669 "$ng->{domain} $ng->{newsgroup}:$n"
672 sub mid_lookup ($$) {
673 my ($self, $mid) = @_;
674 my $self_ng = $self->{ng};
676 my $n = $self_ng->mm->num_for($mid);
677 return ($self_ng, $n) if defined $n;
679 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
680 next if defined $self_ng && $ng eq $self_ng;
681 my $n = $ng->mm->num_for($mid);
682 return ($ng, $n) if defined $n;
687 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
688 my ($self, $xhdr, $range) = @_;
690 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
691 my ($ng, $n) = mid_lookup($self, $1);
692 return r430 unless $n;
693 hdr_mid_response($self, $xhdr, $ng, $n, $range, xref($ng, $n));
694 } else { # numeric range
695 $range = $self->{article} unless defined $range;
696 my $r = get_range($self, $range);
697 return $r unless ref $r;
698 my $ng = $self->{ng};
700 my ($beg, $end) = @$r;
701 more($self, $xhdr ? r221 : r225);
702 long_response($self, $beg, $end, sub {
704 my $mid = $mm->mid_for($$i);
705 more($self, "$$i ".xref($ng, $$i)) if defined $mid;
710 sub search_header_for {
711 my ($srch, $mid, $field) = @_;
712 my $smsg = $srch->lookup_message($mid) or return;
713 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
717 sub hdr_searchmsg ($$$$) {
718 my ($self, $xhdr, $field, $range) = @_;
719 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
720 my ($ng, $n) = mid_lookup($self, $1);
721 return r430 unless $n;
722 my $v = search_header_for($ng->search, $range, $field);
723 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
724 } else { # numeric range
725 $range = $self->{article} unless defined $range;
726 my $srch = $self->{ng}->search;
727 my $mm = $self->{ng}->mm;
728 my $r = get_range($self, $range);
729 return $r unless ref $r;
730 my ($beg, $end) = @$r;
731 more($self, $xhdr ? r221 : r225);
733 long_response($self, $beg, $end, sub {
735 my $res = $srch->query_xover($beg, $end, $off);
736 my $msgs = $res->{msgs};
737 my $nr = scalar @$msgs or return;
740 foreach my $s (@$msgs) {
741 $tmp .= $s->num . ' ' . $s->$field . "\r\n";
743 do_more($self, $tmp);
744 # -1 to adjust for implicit increment in long_response
745 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
751 my ($self, $xhdr, $header, $range) = @_;
752 my $sub = lc $header;
753 if ($sub eq 'message-id') {
754 hdr_message_id($self, $xhdr, $range);
755 } elsif ($sub eq 'xref') {
756 hdr_xref($self, $xhdr, $range);
757 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
759 hdr_searchmsg($self, $xhdr, $sub, $range);
760 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
761 hdr_searchmsg($self, $xhdr, $1, $range);
763 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
769 my ($self, $header, $range) = @_;
770 do_hdr($self, 0, $header, $range);
774 sub cmd_xhdr ($$;$) {
775 my ($self, $header, $range) = @_;
776 do_hdr($self, 1, $header, $range);
779 sub hdr_mid_prefix ($$$$$) {
780 my ($self, $xhdr, $ng, $n, $mid) = @_;
781 return $mid if $xhdr;
783 # HDR for RFC 3977 users
784 if (my $self_ng = $self->{ng}) {
785 ($self_ng eq $ng) ? $n : '0';
791 sub hdr_mid_response ($$$$$$) {
792 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
795 $res .= r221 . "\r\n";
796 $res .= "$mid $v\r\n";
798 $res .= r225 . "\r\n";
799 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
800 $res .= "$pfx $v\r\n";
802 res($self, $res .= '.');
806 sub cmd_xrover ($;$) {
807 my ($self, $range) = @_;
808 my $ng = $self->{ng} or return '412 no newsgroup selected';
809 (defined $range && $range =~ /[<>]/) and
810 return '420 No article(s) selected'; # no message IDs
812 $range = $self->{article} unless defined $range;
813 my $r = get_range($self, $range);
814 return $r unless ref $r;
815 my ($beg, $end) = @$r;
817 my $srch = $ng->search;
818 more($self, '224 Overview information follows');
819 long_response($self, $beg, $end, sub {
821 my $mid = $mm->mid_for($$i) or return;
822 my $h = search_header_for($srch, $mid, 'references');
823 more($self, "$$i $h");
828 my ($num, $smsg) = @_;
829 # n.b. field access and procedural calls can be
830 # 10%-15% faster than OO method calls:
834 PublicInbox::SearchMsg::date($smsg),
835 '<'.PublicInbox::SearchMsg::mid($smsg).'>',
837 PublicInbox::SearchMsg::bytes($smsg),
838 PublicInbox::SearchMsg::lines($smsg));
842 my ($self, $range) = @_;
843 if ($range && $range =~ /\A<(.+)>\z/) {
844 my ($ng, $n) = mid_lookup($self, $1);
845 my $smsg = $ng->search->lookup_message($range) or
846 return '430 No article with that message-id';
847 more($self, '224 Overview information follows (multi-line)');
848 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
850 # Only set article number column if it's the current group
851 my $self_ng = $self->{ng};
852 $n = 0 if (!$self_ng || $self_ng ne $ng);
853 more($self, over_line($n, $smsg));
856 cmd_xover($self, $range);
860 sub cmd_xover ($;$) {
861 my ($self, $range) = @_;
862 $range = $self->{article} unless defined $range;
863 my $r = get_range($self, $range);
864 return $r unless ref $r;
865 my ($beg, $end) = @$r;
866 more($self, "224 Overview information follows for $beg to $end");
867 my $srch = $self->{ng}->search;
869 long_response($self, $beg, $end, sub {
871 my $res = $srch->query_xover($beg, $end, $off);
872 my $msgs = $res->{msgs};
873 my $nr = scalar @$msgs or return;
877 more($self, join("\r\n", map {
878 over_line(PublicInbox::SearchMsg::num($_), $_);
881 # -1 to adjust for implicit increment in long_response
882 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
887 my ($self, $mid) = @_;
888 return r501 unless $mid =~ /\A<(.+)>\z/;
891 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
892 my $n = $ng->mm->num_for($mid);
893 push @paths, "$ng->{newsgroup}/$n" if defined $n;
895 return '430 no such article on server' unless @paths;
896 '223 '.join(' ', @paths);
900 my ($self, $line) = @_;
901 $line = $enc_utf8->encode($line);
902 do_write($self, $line . "\r\n");
906 my ($self, $line) = @_;
907 do_more($self, $line . "\r\n");
911 my ($self, $data) = @_;
912 my $done = $self->write($data);
913 die if $self->{closed};
915 # Do not watch for readability if we have data in the queue,
916 # instead re-enable watching for readability when we can
917 $self->watch_read(0) if (!$done || $self->{long_res});
923 my ($self, $fmt, @args) = @_;
924 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
928 my ($self, $fmt, @args) = @_;
929 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
932 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
935 my ($self, $data) = @_;
936 $data = $enc_utf8->encode($data);
937 if (MSG_MORE && !$self->{write_buf_size}) {
938 my $n = send($self->{sock}, $data, MSG_MORE);
940 my $dlen = length($data);
941 return 1 if $n == $dlen; # all done!
942 $data = substr($data, $n, $dlen - $n);
945 do_write($self, $data);
948 # callbacks for Danga::Socket
950 sub event_hup { $_[0]->close }
951 sub event_err { $_[0]->close }
955 update_idle_time($self);
956 # only continue watching for readability when we are done writing:
957 if ($self->write(undef) == 1 && !$self->{long_res}) {
958 $self->watch_read(1);
964 use constant LINE_MAX => 512; # RFC 977 section 2.3
967 my $buf = $self->read(LINE_MAX) or return $self->close;
968 $self->{rbuf} .= $$buf;
969 while ($r > 0 && $self->{rbuf} =~ s/\A\s*([^\r\n]+)\r?\n//) {
971 return $self->close if $line =~ /[[:cntrl:]]/s;
973 my $fd = $self->{fd};
974 $r = eval { process_line($self, $line) };
975 my $d = $self->{long_res} ?
976 " deferred[$fd]" : '';
977 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
980 return $self->close if $r < 0;
981 my $len = length($self->{rbuf});
982 return $self->close if ($len >= LINE_MAX);
983 update_idle_time($self);
987 my ($self, $bool) = @_;
988 my $rv = $self->SUPER::watch_read($bool);
989 if ($bool && $self->{rbuf} ne '') {
990 # Force another read if there is a pipelined request.
991 # We don't know if the socket has anything for us to read,
992 # and we must double-check again by the time the timer fires
993 # in case we really did dispatch a read event and started
994 # another long response.
996 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
1001 # for graceful shutdown in PublicInbox::Daemon:
1004 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size});