[PATCH] getline_response

[Eric Wong <e@80x24.org>]

---
 lib/PublicInbox/GetlineResponse.pm | 20 ++++++++++++++++++++
 lib/PublicInbox/Qspawn.pm          | 14 ++++++--------
 2 files changed, 26 insertions(+), 8 deletions(-)
 create mode 100644 lib/PublicInbox/GetlineResponse.pm

diff --git a/lib/PublicInbox/GetlineResponse.pm b/lib/PublicInbox/GetlineResponse.pm
new file mode 100644
index 00000000..44b557fa
--- /dev/null
+++ b/lib/PublicInbox/GetlineResponse.pm
@@ -0,0 +1,20 @@
+# Copyright (C) all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+#
+package PublicInbox::GetlineResponse;
+use parent qw(PublicInbox::InputPipe);
+use v5.12;
+
+sub loop {
+	my ($rpipe, $qsp) = @_;
+	my $self = bless {
+		sock => $rpipe,
+		cb => $qsp->can('ipipe_cb'),
+		args => [ $qsp ]
+	}, __PACKAGE__;
+	$self->event_step while $self->{sock};
+}
+
+sub close { CORE::close(delete($_[0]->{sock})) } # can call waitpid_err
+
+1;
diff --git a/lib/PublicInbox/Qspawn.pm b/lib/PublicInbox/Qspawn.pm
index 9ac9aec1..c3258338 100644
--- a/lib/PublicInbox/Qspawn.pm
+++ b/lib/PublicInbox/Qspawn.pm
@@ -302,7 +302,7 @@ sub psgi_return_start { # may run later, much later...
 	}
 }
 
-sub _ipipe_cb { # InputPipe callback
+sub ipipe_cb { # InputPipe callback
 	my ($ipipe, $self) = @_; # $_[-1] rbuf
 	return yield_chunk($self, $ipipe, $_[-1]) if $self->{qfh}; # stream body
 
@@ -334,17 +334,15 @@ EOM
 
 sub _yield_start { # may run later, much later...
 	my ($self) = @_;
-	my $async = !!$self->{psgi_env}->{'pi-httpd.async'};
 	my $rpipe = $self->{rpipe};
-	if ($async) {
+	if ($self->{psgi_env}->{'pi-httpd.async'}) {
 		require PublicInbox::ProcessIONBF;
 		PublicInbox::ProcessIONBF->replace($rpipe);
+		PublicInbox::InputPipe::consume($rpipe, \&ipipe_cb, $self);
+	} else {
+		require PublicInbox::GetlineResponse;
+		PublicInbox::GetlineResponse::loop($rpipe, $self);
 	}
-	my $ipipe = PublicInbox::InputPipe::consume($rpipe, \&_ipipe_cb, $self);
-	return if $async;
-	$ipipe->event_step while $ipipe->{sock};
-	delete $self->{rpipe};
-	close $rpipe; # triggers waitpid_err ASAP
 }
 
 # Used for streaming the stdout of one process as a PSGI response.