user/dev discussion of public-inbox itself
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# Copyright (C) 2016-2020 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>

# Wrap a pipe or file for PSGI streaming response bodies and calls the
# end callback when the object goes out-of-scope.
# This depends on rpipe being _blocking_ on getline.
#
# public-inbox-httpd favors "getline" response bodies to take a
# "pull"-based approach to feeding slow clients (as opposed to a
# more common "push" model)
package PublicInbox::GetlineBody;
use strict;
use warnings;

sub new {
	my ($class, $rpipe, $end, $end_arg, $buf, $filter) = @_;
	bless {
		rpipe => $rpipe,
		end => $end,
		end_arg => $end_arg,
		initial_buf => $buf,
		filter => $filter,
	}, $class;
}

# close should always be called after getline returns undef,
# but a client aborting a connection can ruin our day; so lets
# hope our underlying PSGI server does not leak references, here.
sub DESTROY { $_[0]->close }

sub getline {
	my ($self) = @_;
	my $rpipe = $self->{rpipe} or return; # EOF was set on previous call
	my $buf = delete($self->{initial_buf}) // $rpipe->getline;
	delete($self->{rpipe}) unless defined $buf; # set EOF for next call
	if (my $filter = $self->{filter}) {
		$buf = $filter->translate($buf);
	}
	$buf;
}

sub close {
	my ($self) = @_;
	my ($end, $end_arg) = delete @$self{qw(end end_arg)};
	$end->($end_arg) if $end;
}

1;
debug log:

solving 6becaaf5f ...
found 6becaaf5f in public-inbox.git

user/dev discussion of public-inbox itself

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://public-inbox.org/meta
	git clone --mirror http://czquwvybam4bgbro.onion/meta
	git clone --mirror http://hjrcffqmbrq6wope.onion/meta
	git clone --mirror http://ou63pmih66umazou.onion/meta

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V1 meta meta/ https://public-inbox.org/meta \
		meta@public-inbox.org
	public-inbox-index meta

Example config snippet for mirrors.
Newsgroups are available over NNTP:
	nntp://news.public-inbox.org/inbox.comp.mail.public-inbox.meta
	nntp://7fh6tueqddpjyxjmgtdiueylzoqt6pt7hec3pukyptlmohoowvhde4yd.onion/inbox.comp.mail.public-inbox.meta
	nntp://ie5yzdi7fg72h7s4sdcztq5evakq23rdt33mfyfcddc5u3ndnw24ogqd.onion/inbox.comp.mail.public-inbox.meta
	nntp://4uok3hntl7oi7b4uf4rtfwefqeexfzil2w6kgk2jn5z2f764irre7byd.onion/inbox.comp.mail.public-inbox.meta
	nntp://news.gmane.io/gmane.mail.public-inbox.general
 note: .onion URLs require Tor: https://www.torproject.org/

code repositories for project(s) associated with this inbox:

	https://80x24.org/public-inbox.git

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git