X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FHTTPD%2FAsync.pm;h=7bbab1e1cd65c22d2a895f5a99b5924fa172afd5;hb=a12cd80b5821cf5cb2c8672aad0fba94c451f728;hp=1de9501d18c43528e4ce634458b394d089d6eb41;hpb=da143a9393faa4956403b3f7a4c6ecb5ae3bcf01;p=public-inbox.git

diff --git a/lib/PublicInbox/HTTPD/Async.pm b/lib/PublicInbox/HTTPD/Async.pm
index 1de9501d..7bbab1e1 100644
--- a/lib/PublicInbox/HTTPD/Async.pm
+++ b/lib/PublicInbox/HTTPD/Async.pm
@@ -1,4 +1,4 @@
-# Copyright (C) 2016-2021 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 #
 # XXX This is a totally unstable API for public-inbox internal use only
@@ -14,10 +14,10 @@
 # arg: arg for {cb}
 # end_obj: CODE or object which responds to ->event_step when ->close is called
 package PublicInbox::HTTPD::Async;
-use strict;
+use v5.12;
 use parent qw(PublicInbox::DS);
 use Errno qw(EAGAIN);
-use PublicInbox::Syscall qw(EPOLLIN EPOLLET);
+use PublicInbox::Syscall qw(EPOLLIN);
 
 # This is called via: $env->{'pi-httpd.async'}->()
 # $io is a read-only pipe ($rpipe) for now, but may be a
@@ -37,35 +37,33 @@ sub new {
 		arg => $arg, # arg for $cb
 		end_obj => $end_obj, # like END{}, can ->event_step
 	}, $class;
-	my $pp = tied *$io;
+	my $pp = tied *$io; # ProcessPipe
 	$pp->{fh}->blocking(0) // die "$io->blocking(0): $!";
-	$self->SUPER::new($io, EPOLLIN | EPOLLET);
+	$self->SUPER::new($io, EPOLLIN);
 }
 
 sub event_step {
 	my ($self) = @_;
-	if (my $cb = delete $self->{cb}) {
+	if (defined $self->{cb}) {
 		# this may call async_pass when headers are done
-		$cb->(delete $self->{arg});
+		$self->{cb}->($self->{arg});
 	} elsif (my $sock = $self->{sock}) {
-		my $http = $self->{http};
+		# $http may be undef if discarding body output from cgit on 404
+		my $http = $self->{http} or return $self->close;
 		# $self->{sock} is a read pipe for git-http-backend or cgit
 		# and 65536 is the default Linux pipe size
 		my $r = sysread($sock, my $buf, 65536);
 		if ($r) {
-			$self->{fh}->write($buf); # may call $http->close
-			if ($http->{sock}) { # !closed
-				$self->requeue;
-				# let other clients get some work done, too
-				return;
-			}
+			$self->{ofh}->write($buf); # may call $http->close
+			# let other clients get some work done, too
+			return if $http->{sock}; # !closed
 
 			# else: fall through to close below...
 		} elsif (!defined $r && $! == EAGAIN) {
-			return; # EPOLLET means we'll be notified
+			return; # EPOLLIN means we'll be notified
 		}
 
-		# Done! Error handling will happen in $self->{fh}->close
+		# Done! Error handling will happen in $self->{ofh}->close
 		# called by end_obj->event_step handler
 		delete $http->{forward};
 		$self->close; # queues end_obj->event_step to be called
@@ -73,31 +71,31 @@ sub event_step {
 }
 
 # once this is called, all data we read is passed to the
-# to the PublicInbox::HTTP instance ($http) via $fh->write
+# to the PublicInbox::HTTP instance ($http) via $ofh->write
+# $ofh is typically PublicInbox::HTTP::{Chunked,Identity}, but
+# may be PublicInbox::GzipFilter or $PublicInbox::Qspawn::qx_fh
 sub async_pass {
-	my ($self, $http, $fh, $bref) = @_;
+	my ($self, $http, $ofh, $bref) = @_;
+	delete @$self{qw(cb arg)};
 	# In case the client HTTP connection ($http) dies, it
 	# will automatically close this ($self) object.
 	$http->{forward} = $self;
 
-	# write anything we overread when we were reading headers
-	$fh->write($$bref); # PublicInbox:HTTP::{chunked,identity}_wcb
-
-	# we're done with this, free this memory up ASAP since the
-	# calls after this may use much memory:
-	$$bref = undef;
+	# write anything we overread when we were reading headers.
+	# This is typically PublicInbox:HTTP::{chunked,identity}_wcb,
+	# but may be PublicInbox::GzipFilter::write.  PSGI requires
+	# *_wcb methods respond to ->write (and ->close), not ->print
+	$ofh->write($$bref);
 
 	$self->{http} = $http;
-	$self->{fh} = $fh;
-
-	# either hit EAGAIN or ->requeue to keep EPOLLET happy
-	event_step($self);
+	$self->{ofh} = $ofh;
 }
 
 # may be called as $forward->close in PublicInbox::HTTP or EOF (event_step)
 sub close {
 	my $self = $_[0];
 	$self->SUPER::close; # DS::close
+	delete @$self{qw(cb arg)};
 
 	# we defer this to the next timer loop since close is deferred
 	if (my $end_obj = delete $self->{end_obj}) {