1 # Copyright (C) 2016-2018 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);
12 use fields qw(cb cleanup);
13 require PublicInbox::EvCleanup;
16 my ($class, $io, $cb, $cleanup) = @_;
17 my $self = fields::new($class);
18 IO::Handle::blocking($io, 0);
19 $self->SUPER::new($io);
21 $self->{cleanup} = $cleanup;
26 # fires after pending writes are complete:
27 sub restart_read_cb ($) {
29 sub { $self->watch_read(1) }
33 my ($http, $fh, $bref) = @_;
36 my $r = sysread($self->{sock}, $$bref, 8192);
39 return if $http->{closed};
40 if ($http->{write_buf_size}) {
42 $http->write(restart_read_cb($self));
44 # stay in watch_read, but let other clients
45 # get some work done, too.
47 } elsif (!defined $r) {
48 return if $!{EAGAIN} || $!{EINTR};
51 # Done! Error handling will happen in $fh->close
52 # called by the {cleanup} handler
53 $http->{forward} = undef;
59 my ($self, $http, $fh, $bref) = @_;
60 # In case the client HTTP connection ($http) dies, it
61 # will automatically close this ($self) object.
62 $http->{forward} = $self;
63 $fh->write($$bref); # PublicInbox:HTTP::{chunked,identity}_wcb
64 $self->{cb} = main_cb($http, $fh, $bref);
67 sub event_read { $_[0]->{cb}->(@_) }
68 sub event_hup { $_[0]->{cb}->(@_) }
69 sub event_err { $_[0]->{cb}->(@_) }
73 my $cleanup = $self->{cleanup};
74 $self->{cleanup} = $self->{cb} = undef;
75 $self->SUPER::close(@_);
77 # we defer this to the next timer loop since close is deferred
78 PublicInbox::EvCleanup::next_tick($cleanup) if $cleanup;