X-Git-Url: http://www.git.stargrave.org/?p=public-inbox.git;a=blobdiff_plain;f=lib%2FPublicInbox%2FIMAPdeflate.pm;fp=lib%2FPublicInbox%2FIMAPdeflate.pm;h=0000000000000000000000000000000000000000;hp=d5929ef26ed5dfd85d2d74e62172b75758066bf0;hb=23af251dd607c4e75ab1e68063f2c885c48cc035;hpb=9b0c238f887475d920a8589b492ec15c63770152

diff --git a/lib/PublicInbox/IMAPdeflate.pm b/lib/PublicInbox/IMAPdeflate.pm
deleted file mode 100644
index d5929ef2..00000000
--- a/lib/PublicInbox/IMAPdeflate.pm
+++ /dev/null
@@ -1,126 +0,0 @@
-# Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
-# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
-# TODO: reduce duplication from PublicInbox::NNTPdeflate
-
-# RFC 4978
-package PublicInbox::IMAPdeflate;
-use strict;
-use warnings;
-use 5.010_001;
-use base qw(PublicInbox::IMAP);
-use Compress::Raw::Zlib;
-
-my %IN_OPT = (
-	-Bufsize => 1024,
-	-WindowBits => -15, # RFC 1951
-	-AppendOutput => 1,
-);
-
-# global deflate context and buffer
-my $zbuf = \(my $buf = '');
-my $zout;
-{
-	my $err;
-	($zout, $err) = Compress::Raw::Zlib::Deflate->new(
-		# nnrpd (INN) and Compress::Raw::Zlib favor MemLevel=9,
-		# the zlib C library and git use MemLevel=8 as the default
-		# -MemLevel => 9,
-		-Bufsize => 65536, # same as nnrpd
-		-WindowBits => -15, # RFC 1951
-		-AppendOutput => 1,
-	);
-	$err == Z_OK or die "Failed to initialize zlib deflate stream: $err";
-}
-
-sub enable {
-	my ($class, $self, $tag) = @_;
-	my ($in, $err) = Compress::Raw::Zlib::Inflate->new(%IN_OPT);
-	if ($err != Z_OK) {
-		$self->err("Inflate->new failed: $err");
-		$self->write(\"$tag BAD failed to activate compression\r\n");
-		return;
-	}
-	$self->write(\"$tag OK DEFLATE active\r\n");
-	bless $self, $class;
-	$self->{zin} = $in;
-}
-
-# overrides PublicInbox::NNTP::compressed
-sub compressed { 1 }
-
-sub do_read ($$$$) {
-	my ($self, $rbuf, $len, $off) = @_;
-
-	my $zin = $self->{zin} or return; # closed
-	my $doff;
-	my $dbuf = delete($self->{dbuf}) // '';
-	$doff = length($dbuf);
-	my $r = PublicInbox::DS::do_read($self, \$dbuf, $len, $doff) or return;
-
-	# Workaround inflate bug appending to OOK scalars:
-	# <https://rt.cpan.org/Ticket/Display.html?id=132734>
-	# We only have $off if the client is pipelining, and pipelining
-	# is where our substr() OOK optimization in event_step makes sense.
-	if ($off) {
-		my $copy = $$rbuf;
-		undef $$rbuf;
-		$$rbuf = $copy;
-	}
-
-	# assert(length($$rbuf) == $off) as far as NNTP.pm is concerned
-	# -ConsumeInput is true, so $dbuf is automatically emptied
-	my $err = $zin->inflate($dbuf, $rbuf);
-	if ($err == Z_OK) {
-		$self->{dbuf} = $dbuf if $dbuf ne '';
-		$r = length($$rbuf) and return $r;
-		# nothing ready, yet, get more, later
-		$self->requeue;
-	} else {
-		delete $self->{zin};
-		$self->close;
-	}
-	0;
-}
-
-# override PublicInbox::DS::msg_more
-sub msg_more ($$) {
-	my $self = $_[0];
-
-	# $_[1] may be a reference or not for ->deflate
-	my $err = $zout->deflate($_[1], $zbuf);
-	$err == Z_OK or die "->deflate failed $err";
-	1;
-}
-
-sub zflush ($) {
-	my ($self) = @_;
-
-	my $deflated = $zbuf;
-	$zbuf = \(my $next = '');
-
-	my $err = $zout->flush($deflated, Z_FULL_FLUSH);
-	$err == Z_OK or die "->flush failed $err";
-
-	# We can still let the lower socket layer do buffering:
-	PublicInbox::DS::msg_more($self, $$deflated);
-}
-
-# compatible with PublicInbox::DS::write, so $_[1] may be a reference or not
-sub write ($$) {
-	my $self = $_[0];
-	return PublicInbox::DS::write($self, $_[1]) if ref($_[1]) eq 'CODE';
-
-	my $deflated = $zbuf;
-	$zbuf = \(my $next = '');
-
-	# $_[1] may be a reference or not for ->deflate
-	my $err = $zout->deflate($_[1], $deflated);
-	$err == Z_OK or die "->deflate failed $err";
-	$err = $zout->flush($deflated, Z_FULL_FLUSH);
-	$err == Z_OK or die "->flush failed $err";
-
-	# We can still let the socket layer do buffering:
-	PublicInbox::DS::write($self, $deflated);
-}
-
-1;