1 files changed, 0 insertions, 126 deletions
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;