1 # Copyright (C) 2015 all contributors <meta@public-inbox.org>
2 # License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
3 package PublicInbox::NNTP;
6 use base qw(Danga::Socket);
7 use fields qw(nntpd article rbuf ng long_res);
8 use PublicInbox::Msgmap;
9 use PublicInbox::GitCatFile;
10 use PublicInbox::MID qw(mid2path);
12 use Data::Dumper qw(Dumper);
13 use POSIX qw(strftime);
14 use Time::HiRes qw(clock_gettime CLOCK_MONOTONIC);
16 r501 => '501 command syntax error',
17 r221 => '221 Header follows',
18 r224 => '224 Overview information follows (multi-line)',
19 r225 => '225 Headers follow (multi-line)',
20 r430 => '430 No article with that message-id',
21 long_response_limit => 0xffffffff,
24 sub now () { clock_gettime(CLOCK_MONOTONIC) };
26 my @OVERVIEW = qw(Subject From Date Message-ID References Bytes Lines);
27 my $OVERVIEW_FMT = join(":\r\n", @OVERVIEW) . ":\r\n";
29 # disable commands with easy DoS potential:
30 # LISTGROUP could get pretty bad, too...
31 my %DISABLED; # = map { $_ => 1 } qw(xover list_overview_fmt newnews xhdr);
34 my ($class, $sock, $nntpd) = @_;
35 my $self = fields::new($class);
36 binmode $sock, ':utf8'; # RFC 3977
37 $self->SUPER::new($sock);
38 $self->{nntpd} = $nntpd;
39 res($self, '201 server ready - post via email');
47 my $tot = prototype $cb;
48 my ($nreq, undef) = split(';', $tot);
49 $nreq = ($nreq =~ tr/$//) - 1;
50 $tot = ($tot =~ tr/$//) - 1;
51 ($argc <= $tot && $argc >= $nreq);
54 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
55 sub process_line ($$) {
57 my ($req, @args) = split(/\s+/, $l);
61 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
63 return res($self, '500 command not recognized') unless $req;
64 return res($self, r501) unless args_ok($req, scalar @args);
66 my $res = eval { $req->($self, @args) };
68 if ($err && !$self->{closed}) {
69 chomp($l = Dumper(\$l));
70 err($self, "error from: $l $err");
71 $res = '503 program fault - command not performed';
73 return 0 unless defined $res;
78 my ($self, $arg) = @_;
80 return r501 unless $arg eq 'READER';
81 '200 reader status acknowledged';
84 sub cmd_slave ($) { '202 slave status noted' }
86 sub cmd_xgtitle ($;$) {
87 my ($self, $wildmat) = @_;
88 more($self, '282 list of groups and descriptions follows');
89 list_newsgroups($self, $wildmat);
93 sub list_overview_fmt ($) {
95 do_more($self, $OVERVIEW_FMT);
98 sub list_active ($;$) {
99 my ($self, $wildmat) = @_;
100 wildmat2re($wildmat);
101 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
102 $ng->{name} =~ $wildmat or next;
103 group_line($self, $ng);
107 sub list_active_times ($;$) {
108 my ($self, $wildmat) = @_;
109 wildmat2re($wildmat);
110 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
111 $ng->{name} =~ $wildmat or next;
112 my $c = eval { $ng->mm->created_at } || time;
113 more($self, "$ng->{name} $c $ng->{address}");
117 sub list_newsgroups ($;$) {
118 my ($self, $wildmat) = @_;
119 wildmat2re($wildmat);
120 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
121 $ng->{name} =~ $wildmat or next;
122 my $d = $ng->description;
123 more($self, "$ng->{name} $d");
127 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
128 sub cmd_list ($;$$) {
129 my ($self, @args) = @_;
131 my $arg = shift @args;
132 $arg =~ tr/A-Z./a-z_/;
134 return r501 if $DISABLED{$arg};
140 return r501 unless $arg && args_ok($arg, scalar @args);
141 more($self, '215 information follows');
142 $arg->($self, @args);
144 more($self, '215 list of newsgroups follows');
145 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
146 group_line($self, $ng);
152 sub cmd_listgroup ($;$) {
153 my ($self, $group) = @_;
154 if (defined $group) {
155 my $res = cmd_group($self, $group);
156 return $res if ($res !~ /\A211 /);
160 $self->{ng} or return '412 no newsgroup selected';
161 $self->long_response(0, long_response_limit, sub {
163 my $nr = $self->{ng}->mm->id_batch($$i, sub {
165 more($self, join("\r\n", @$ary));
168 # -1 to adjust for implicit increment in long_response
169 $$i = $nr ? $$i + $nr - 1 : long_response_limit;
173 sub parse_time ($$;$) {
174 my ($date, $time, $gmt) = @_;
175 use Time::Local qw();
176 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
178 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt\n";
181 my @now = $gmt ? gmtime : localtime;
182 my ($YYYY, $MM, $DD);
183 if (length($date) == 8) { # RFC 3977 allows YYYYMMDD
184 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
185 } else { # legacy clients send YYMMDD
186 ($YYYY, $MM, $DD) = unpack('A2A2A2', $date);
187 if ($YYYY > strftime('%y', @now)) {
188 my $cur_year = $now[5] + 1900;
189 $YYYY += int($cur_year / 1000) * 1000 - 100;
193 Time::Local::timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
195 Time::Local::timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
199 sub group_line ($$) {
200 my ($self, $ng) = @_;
201 my ($min, $max) = $ng->mm->minmax;
202 more($self, "$ng->{name} $max $min n") if defined $min && defined $max;
205 sub cmd_newgroups ($$$;$$) {
206 my ($self, $date, $time, $gmt, $dists) = @_;
207 my $ts = eval { parse_time($date, $time, $gmt) };
211 more($self, '231 list of new newsgroups follows');
212 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
213 my $c = eval { $ng->mm->created_at } || 0;
214 next unless $c > $ts;
215 group_line($self, $ng);
220 sub wildmat2re (;$) {
221 return $_[0] = qr/.*/ if (!defined $_[0] || $_[0] eq '*');
224 use Digest::SHA qw(sha1_hex);
227 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
229 my $key = sha1_hex($orig . $salt);
230 $orig =~ s/([^\w\-])+/\Q$1/g;
234 my %map = ('*' => '.*', '?' => '.' );
235 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
237 $tmp =~ s#([a-f0-9]{40})#
238 my $orig = $keep{$1};
239 defined $orig ? $orig : $1;
242 $_[0] = qr/\A$tmp\z/;
246 return $_[0] = qr/\A\z/ unless defined $_[0];
247 my %map = ('*' => '.*', ',' => '|');
248 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
249 $_[0] = qr/\A(?:$_[0])\z/;
252 sub cmd_newnews ($$$$;$$) {
253 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
254 my $ts = eval { parse_time($date, $time, $gmt) };
256 more($self, '230 list of new articles by message-id follows');
257 my ($keep, $skip) = split('!', $newsgroups, 2);
261 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
262 $ng->{name} =~ $keep or next;
263 $ng->{name} =~ $skip and next;
264 my $srch = $ng->search or next;
267 return '.' unless @srch;
270 my $opts = { asc => 1, limit => 1000, offset => 0 };
271 $self->long_response(0, long_response_limit, sub {
274 my $res = $srch->query($ts, $opts);
275 my $msgs = $res->{msgs};
276 if (my $nr = scalar @$msgs) {
278 join(">\r\n<", map { $_->mid } @$msgs ).
280 $opts->{offset} += $nr;
283 if (@srch) { # continue onto next newsgroup
285 } else { # break out of the long response.
286 $$i = long_response_limit;
293 my ($self, $group) = @_;
294 my $no_such = '411 no such news group';
295 my $ng = $self->{nntpd}->{groups}->{$group} or return $no_such;
298 my ($min, $max) = $ng->mm->minmax;
301 $self->{article} = $min;
302 my $est_size = $max - $min;
303 "211 $est_size $min $max $group";
306 sub article_adj ($$) {
307 my ($self, $off) = @_;
308 my $ng = $self->{ng} or return '412 no newsgroup selected';
310 my $n = $self->{article};
311 defined $n or return '420 no current article has been selected';
314 my $mid = $ng->mm->mid_for($n);
316 $n = $off > 0 ? 'next' : 'previous';
317 return "421 no $n article in this group";
319 $self->{article} = $n;
320 "223 $n <$mid> article retrieved - request text separately";
323 sub cmd_next ($) { article_adj($_[0], 1) }
324 sub cmd_last ($) { article_adj($_[0], -1) }
326 # We want to encourage using email and CC-ing everybody involved to avoid
327 # the single-point-of-failure a single server provides.
330 my $ng = $self->{ng};
331 $ng ? "440 mailto:$ng->{address} to post" : '440 posting not allowed'
336 res($self, '205 closing connection - goodbye!');
341 sub art_lookup ($$$) {
342 my ($self, $art, $set_headers) = @_;
343 my $ng = $self->{ng};
347 if ($art =~ /\A\d+\z/o) {
348 $err = '423 no such article number in this group';
351 } elsif ($art =~ /\A<([^>]+)>\z/) {
354 $n = $ng->mm->num_for($mid) if $ng;
355 goto found if defined $n;
356 foreach my $g (values %{$self->{nntpd}->{groups}}) {
357 $n = $g->mm->num_for($mid);
368 $err = '420 no current article has been selected';
369 $n = $self->{article};
370 defined $n or return $err;
372 $ng or return '412 no newsgroup has been selected';
373 $mid = $ng->mm->mid_for($n);
374 defined $mid or return $err;
377 my $o = 'HEAD:' . mid2path($mid);
379 my $s = eval { Email::MIME->new($ng->gcf->cat_file($o, \$bytes)) };
380 return $err unless $s;
383 $s->header_set('Newsgroups', $ng->{name});
384 $s->header_set('Xref', xref($ng, $n));
385 $lines = $s->body =~ tr!\n!\n!;
388 $s->body_set('') if ($set_headers == 2);
390 [ $n, $mid, $s, $bytes, $lines, $ng ];
393 sub simple_body_write ($$) {
397 $body =~ s/^\./../smg;
398 $body =~ s/(?<!\r)\n/\r\n/sg;
399 do_more($self, $body);
400 do_more($self, "\r\n") unless $body =~ /\r\n\z/s;
405 my ($self, $art) = @_;
406 $self->{article} = $art if defined $art && $art =~ /\A\d+\z/;
409 sub cmd_article ($;$) {
410 my ($self, $art) = @_;
411 my $r = $self->art_lookup($art, 1);
412 return $r unless ref $r;
413 my ($n, $mid, $s) = @$r;
414 set_art($self, $art);
415 more($self, "220 $n <$mid> article retrieved - head and body follow");
416 do_more($self, $s->header_obj->as_string);
417 do_more($self, "\r\n");
418 simple_body_write($self, $s);
422 my ($self, $art) = @_;
423 my $r = $self->art_lookup($art, 2);
424 return $r unless ref $r;
425 my ($n, $mid, $s) = @$r;
426 set_art($self, $art);
427 more($self, "221 $n <$mid> article retrieved - head follows");
428 do_more($self, $s->header_obj->as_string);
433 my ($self, $art) = @_;
434 my $r = $self->art_lookup($art, 0);
435 return $r unless ref $r;
436 my ($n, $mid, $s) = @$r;
437 set_art($self, $art);
438 more($self, "222 $n <$mid> article retrieved - body follows");
439 simple_body_write($self, $s);
443 my ($self, $art) = @_;
444 my $r = $self->art_lookup($art, 0);
445 return $r unless ref $r;
446 my ($n, $mid, undef) = @$r;
447 set_art($self, $art);
448 "223 $n <$mid> article retrieved - request text separately";
451 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
453 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
457 more($self, '100 help text follows');
462 my ($self, $range) = @_;
463 my $ng = $self->{ng} or return '412 no news group has been selected';
464 defined $range or return '420 No article(s) selected';
466 my ($min, $max) = $ng->mm->minmax;
467 if ($range =~ /\A(\d+)\z/) {
469 } elsif ($range =~ /\A(\d+)-\z/) {
470 ($beg, $end) = ($1, $max);
471 } elsif ($range =~ /\A(\d+)-(\d+)\z/) {
472 ($beg, $end) = ($1, $2);
476 $beg = $min if ($beg < $min);
477 $end = $max if ($end > $max);
478 return '420 No article(s) selected' if ($beg > $end);
483 my ($r, $header) = @_;
484 return $r->[3] if $header =~ /\A:?bytes\z/i;
485 return $r->[4] if $header =~ /\A:?lines\z/i;
486 $r = $r->[2]->header_obj->header($header);
487 defined $r or return;
488 $r =~ s/[\r\n\t]+/ /sg;
492 sub long_response ($$$$) {
493 my ($self, $beg, $end, $cb) = @_;
494 die "BUG: nested long response" if $self->{long_res};
496 my $fd = $self->{fd};
497 defined $fd or return;
498 # make sure we disable reading during a long response,
499 # clients should not be sending us stuff and making us do more
500 # work while we are stream a response to them
501 $self->watch_read(0);
503 $self->{long_res} = sub {
504 # limit our own running time for fairness with other
505 # clients and to avoid buffering too much:
510 eval { $cb->(\$beg) };
511 } until (($err = $@) || $self->{closed} ||
512 ++$beg > $end || !--$lim || $self->{write_buf_size});
514 if ($err || $self->{closed}) {
515 $self->{long_res} = undef;
519 "$err during long response[$fd] - %0.6f",
522 if ($self->{closed}) {
523 out($self, " deferred[$fd] aborted - %0.6f",
526 $self->watch_read(1);
528 } elsif (!$lim || $self->{write_buf_size}) {
529 # no recursion, schedule another call ASAP
530 # but only after all pending writes are done
531 Danga::Socket->AddTimer(0, sub {
532 $self->write($self->{long_res});
535 $self->{long_res} = undef;
536 $self->watch_read(1);
538 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
541 $self->{long_res}->(); # kick off!
545 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
546 my ($self, $xhdr, $range) = @_;
548 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
549 my ($ng, $n) = mid_lookup($self, $1);
550 return r430 unless $n;
551 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
552 } else { # numeric range
553 $range = $self->{article} unless defined $range;
554 my $r = get_range($self, $range);
555 return $r unless ref $r;
556 my $mm = $self->{ng}->mm;
557 my ($beg, $end) = @$r;
558 more($self, $xhdr ? r221 : r225);
559 $self->long_response($beg, $end, sub {
561 my $mid = $mm->mid_for($$i);
562 more($self, "$$i <$mid>") if defined $mid;
569 "$ng->{domain} $ng->{name}:$n"
572 sub mid_lookup ($$) {
573 my ($self, $mid) = @_;
574 my $self_ng = $self->{ng};
576 my $n = $self_ng->mm->num_for($mid);
577 return ($self_ng, $n) if defined $n;
579 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
580 next if defined $self_ng && $ng eq $self_ng;
581 my $n = $ng->mm->num_for($mid);
582 return ($ng, $n) if defined $n;
587 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
588 my ($self, $xhdr, $range) = @_;
590 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
591 my ($ng, $n) = mid_lookup($self, $1);
592 return r430 unless $n;
593 hdr_mid_response($self, $xhdr, $ng, $n, $range, xref($ng, $n));
594 } else { # numeric range
595 $range = $self->{article} unless defined $range;
596 my $r = get_range($self, $range);
597 return $r unless ref $r;
598 my $ng = $self->{ng};
600 my ($beg, $end) = @$r;
601 more($self, $xhdr ? r221 : r225);
602 $self->long_response($beg, $end, sub {
604 my $mid = $mm->mid_for($$i);
605 more($self, "$$i ".xref($ng, $$i)) if defined $mid;
611 my ($srch, $mid) = @_;
613 my $smsg = $srch->lookup_message($mid);
614 $smsg = PublicInbox::SearchMsg->load_doc($smsg->{doc});
615 $smsg->mini_mime->header_obj;
619 sub hdr_searchmsg ($$$$) {
620 my ($self, $xhdr, $hdr, $range) = @_;
622 if ($hdr eq 'date') {
625 strftime('%a, %d %b %Y %T %z', gmtime($_[0]));
629 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
630 my ($ng, $n) = mid_lookup($self, $1);
631 return r430 unless $n;
632 if (my $srch = $ng->search) {
633 my $m = header_obj_for($srch, $range);
634 my $v = $m->header($hdr);
635 $v = $filter->($v) if defined $v && $filter;
636 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
638 hdr_slow($self, $xhdr, $hdr, $range);
640 } else { # numeric range
641 $range = $self->{article} unless defined $range;
642 my $srch = $self->{ng}->search or
643 return hdr_slow($self, $xhdr, $hdr, $range);
644 my $mm = $self->{ng}->mm;
645 my $r = get_range($self, $range);
646 return $r unless ref $r;
647 my ($beg, $end) = @$r;
648 more($self, $xhdr ? r221 : r225);
649 $self->long_response($beg, $end, sub {
651 my $mid = $mm->mid_for($$i) or return;
652 my $m = header_obj_for($srch, $mid) or return;
653 my $v = $m->header($hdr);
654 defined $v or return;
655 $v = $filter->($v) if $filter;
656 more($self, "$$i $v");
662 my ($self, $xhdr, $header, $range) = @_;
663 my $sub = lc $header;
664 if ($sub eq 'message-id') {
665 hdr_message_id($self, $xhdr, $range);
666 } elsif ($sub eq 'xref') {
667 hdr_xref($self, $xhdr, $range);
668 } elsif ($sub =~ /\A(subject|references|date)\z/) {
669 hdr_searchmsg($self, $xhdr, $sub, $range);
671 hdr_slow($self, $xhdr, $header, $range);
677 my ($self, $header, $range) = @_;
678 do_hdr($self, 0, $header, $range);
682 sub cmd_xhdr ($$;$) {
683 my ($self, $header, $range) = @_;
684 do_hdr($self, 1, $header, $range);
687 sub hdr_mid_prefix ($$$$$) {
688 my ($self, $xhdr, $ng, $n, $mid) = @_;
689 return $mid if $xhdr;
691 # HDR for RFC 3977 users
692 if (my $self_ng = $self->{ng}) {
693 ($self_ng eq $ng) ? $n : '0';
699 sub hdr_mid_response ($$$$$$) {
700 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
703 $res .= r221 . "\r\n";
704 $res .= "$mid $v\r\n" if defined $v;
706 $res .= r225 . "\r\n";
708 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
709 $res .= "$pfx $v\r\n";
712 res($self, $res .= '.');
716 sub hdr_slow ($$$$) {
717 my ($self, $xhdr, $header, $range) = @_;
719 if (defined $range && $range =~ /\A<.+>\z/) { # Message-ID
720 my $r = $self->art_lookup($range, 2);
721 return $r unless ref $r;
722 my ($n, $ng) = ($r->[0], $r->[5]);
723 my $v = hdr_val($r, $header);
724 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
725 } else { # numeric range
726 $range = $self->{article} unless defined $range;
727 my $r = get_range($self, $range);
728 return $r unless ref $r;
729 my ($beg, $end) = @$r;
730 more($self, $xhdr ? r221 : r225);
731 $self->long_response($beg, $end, sub {
733 $r = $self->art_lookup($$i, 2);
734 return unless ref $r;
735 defined($r = hdr_val($r, $header)) or return;
736 more($self, "$$i $r");
741 sub cmd_xrover ($;$) {
742 my ($self, $range) = @_;
743 my $ng = $self->{ng} or return '412 no newsgroup selected';
744 (defined $range && $range =~ /[<>]/) and
745 return '420 No article(s) selected'; # no message IDs
747 $range = $self->{article} unless defined $range;
748 my $r = get_range($self, $range);
749 return $r unless ref $r;
750 my ($beg, $end) = @$r;
752 my $srch = $ng->search;
753 more($self, '224 Overview information follows');
754 $self->long_response($beg, $end, sub {
756 my $mid = $mm->mid_for($$i) or return;
757 my $m = header_obj_for($srch, $mid) or return;
758 my $h = $m->header('references');
759 more($self, "$$i $h") if defined $h;
766 more($self, join("\t", $r->[0], map {
767 my $h = hdr_val($r, $_);
768 defined $h ? $h : '';
773 my ($self, $range) = @_;
774 if ($range && $range =~ /\A<.+>\z/) {
775 my $r = $self->art_lookup($range, 2);
776 return '430 No article with that message-id' unless ref $r;
777 more($self, '224 Overview information follows (multi-line)');
779 # Only set article number column if it's the current group
780 my $ng = $self->{ng};
781 $r->[0] = 0 if (!$ng || $ng ne $r->[5]);
782 over_line($self, $r);
785 cmd_xover($self, $range);
789 sub cmd_xover ($;$) {
790 my ($self, $range) = @_;
791 $range = $self->{article} unless defined $range;
792 my $r = get_range($self, $range);
793 return $r unless ref $r;
794 my ($beg, $end) = @$r;
795 more($self, "224 Overview information follows for $beg to $end");
796 $self->long_response($beg, $end, sub {
798 my $r = $self->art_lookup($$i, 2);
799 return unless ref $r;
800 over_line($self, $r);
805 my ($self, $mid) = @_;
806 return r501 unless $mid =~ /\A<(.+)>\z/;
809 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
810 my $n = $ng->mm->num_for($mid);
811 push @paths, "$ng->{name}/$n" if defined $n;
813 return '430 no such article on server' unless @paths;
814 '223 '.join(' ', @paths);
818 my ($self, $line) = @_;
819 do_write($self, $line . "\r\n");
823 my ($self, $line) = @_;
824 do_more($self, $line . "\r\n");
828 my ($self, $data) = @_;
829 my $done = $self->write($data);
830 die if $self->{closed};
832 # Do not watch for readability if we have data in the queue,
833 # instead re-enable watching for readability when we can
834 $self->watch_read(0) if (!$done || $self->{long_res});
840 my ($self, $fmt, @args) = @_;
841 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
845 my ($self, $fmt, @args) = @_;
846 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
849 use constant MSG_MORE => ($^O eq 'linux') ? 0x8000 : 0;
852 my ($self, $data) = @_;
853 if (MSG_MORE && !$self->{write_buf_size}) {
854 my $n = send($self->{sock}, $data, MSG_MORE);
856 my $dlen = length($data);
857 return 1 if $n == $dlen; # all done!
858 $data = substr($data, $n, $dlen - $n);
861 $self->do_write($data);
864 # callbacks for by Danga::Socket
866 sub event_hup { $_[0]->close }
867 sub event_err { $_[0]->close }
871 # only continue watching for readability when we are done writing:
872 if ($self->write(undef) == 1 && !$self->{long_res}) {
873 $self->watch_read(1);
879 use constant LINE_MAX => 512; # RFC 977 section 2.3
882 my $buf = $self->read(LINE_MAX) or return $self->close;
883 $self->{rbuf} .= $$buf;
884 while ($r > 0 && $self->{rbuf} =~ s/\A\s*([^\r\n]+)\r?\n//) {
887 my $fd = $self->{fd};
888 $r = eval { $self->process_line($line) };
889 my $d = $self->{long_res} ?
890 " deferred[$fd]" : '';
891 out($self, "[$fd] $line - %0.6f$d", now() - $t0);
894 return $self->close if $r < 0;
895 my $len = length($self->{rbuf});
896 return $self->close if ($len >= LINE_MAX);
900 my ($self, $bool) = @_;
901 my $rv = $self->SUPER::watch_read($bool);
902 if ($bool && $self->{rbuf} ne '') {
903 # Force another read if there is a pipelined request.
904 # We don't know if the socket has anything for us to read,
905 # and we must double-check again by the time the timer fires
906 # in case we really did dispatch a read event and started
907 # another long response.
908 Danga::Socket->AddTimer(0, sub {
909 if (&Danga::Socket::POLLIN & $self->{event_watch}) {
919 ($self->{rbuf} ne '' || $self->{long_res} || $self->{write_buf_size});