[PATCH] http: prevent zero-byte writes

[PATCH] http: prevent zero-byte writes

[Eric Wong]

Plack::Middleware::Deflater (and perhaps other middleware)
triggers zero-byte writes which wastes syscalls when
they get passed to Danga::Socket.  This may also trigger
problems when we introduce TLS support in the future.
---
 lib/PublicInbox/HTTP.pm | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/PublicInbox/HTTP.pm b/lib/PublicInbox/HTTP.pm
index 0675f6a..2888311 100644
--- a/lib/PublicInbox/HTTP.pm
+++ b/lib/PublicInbox/HTTP.pm
@@ -371,6 +371,13 @@ sub quit {
 sub event_hup { $_[0]->close }
 sub event_err { $_[0]->close }
 
+sub write ($$) : method {
+	my PublicInbox::HTTP $self = $_[0];
+	return 1 if (defined($_[1]) && ref($_[1]) eq '' && $_[1] eq '');
+
+	$self->SUPER::write($_[1]);
+}
+
 # for graceful shutdown in PublicInbox::Daemon:
 sub busy () {
 	my ($self) = @_;
-- 
EW