use constant {
LINE_MAX => 512, # RFC 977 section 2.3
r501 => '501 command syntax error',
+ r502 => '502 Command unavailable',
r221 => '221 Header follows',
r224 => '224 Overview information follows (multi-line)',
r225 => '225 Headers follow (multi-line)',
HDR\r
OVER\r
+my $have_deflate;
my $EXPMAP; # fd -> [ idle_time, $self ]
my $expt;
our $EXPTIME = 180; # 3 minutes
} elsif ($more) { # $self->{wbuf}:
update_idle_time($self);
+ # COMPRESS users all share the same DEFLATE context.
+ # Flush it here to ensure clients don't see
+ # each other's data
+ $self->zflush;
+
# no recursion, schedule another call ASAP
# but only after all pending writes are done
my $wbuf = $self->{wbuf} ||= [];
});
}
+sub compressed { undef }
+
sub cmd_starttls ($) {
my ($self) = @_;
my $sock = $self->{sock} or return;
# RFC 4642 2.2.1
- (ref($sock) eq 'IO::Socket::SSL') and return '502 Command unavailable';
+ return r502 if (ref($sock) eq 'IO::Socket::SSL' || $self->compressed);
my $opt = $self->{nntpd}->{accept_tls} or
return '580 can not initiate TLS negotiation';
res($self, '382 Continue with TLS negotiation');
undef;
}
+# RFC 8054
+sub cmd_compress ($$) {
+ my ($self, $alg) = @_;
+ return '503 Only the DEFLATE is supported' if uc($alg) ne 'DEFLATE';
+ return r502 if $self->compressed || !$have_deflate;
+ res($self, '206 Compression active');
+ PublicInbox::NNTPdeflate->enable($self);
+ $self->requeue;
+ undef
+}
+
+sub zflush {} # overridden by NNTPdeflate
+
sub cmd_xpath ($$) {
my ($self, $mid) = @_;
return r501 unless $mid =~ /\A<(.+)>\z/;
($self->{rbuf} || $self->{wbuf} || not_idle_long($self, $now));
}
+# this is an import to prevent "perl -c" from complaining about fields
+sub import {
+ $have_deflate = eval { require PublicInbox::NNTPdeflate } and
+ $CAPABILITIES .= "COMPRESS DEFLATE\r\n";
+}
+
1;