1 # Copyright (C) 2016 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # XXX This is a totally unstable API for public-inbox internal use only
5 # This is exposed via the 'pi-httpd.async' key in the PSGI env hash.
6 # The name of this key is not even stable!
7 # Currently is is intended for use with read-only pipes.
8 package PublicInbox::HTTPD::Async;
11 use base qw(Danga::Socket);
15 my ($class, $io, $cb) = @_;
16 my $self = fields::new($class);
17 IO::Handle::blocking($io, 0);
18 $self->SUPER::new($io);
25 my ($self, $io, $fh) = @_;
26 my $restart_read = sub { $self->watch_read(1) };
28 # In case the client HTTP connection ($io) dies, it
29 # will automatically close this ($self) object.
30 $io->{forward} = $self;
32 my $r = sysread($self->{sock}, my $buf, 8192);
35 if ($io->{write_buf_size}) {
37 $io->write($restart_read);
39 return; # stay in watch_read
40 } elsif (!defined $r) {
41 return if $!{EAGAIN} || $!{EINTR};
44 # Done! Error handling will happen in $fh->close
45 $io->{forward} = undef;
51 sub event_read { $_[0]->{cb}->() }
52 sub event_hup { $_[0]->{cb}->() }
53 sub event_err { $_[0]->{cb}->() }
54 sub sysread { shift->{sock}->sysread(@_) }
59 $self->SUPER::close(@_);
62 # do not let ourselves be closed during graceful termination
63 sub busy () { $_[0]->{cb} }