kio-extras5/0001-sftp-Allow-compression-if-necessary.patch

From f3ad370f237c69c018c968bab6f79b16c27edbba Mon Sep 17 00:00:00 2001
From: Fabian Vogt <fabian@ritter-vogt.de>
Date: Tue, 16 Nov 2021 08:35:45 +0100
Subject: [PATCH] sftp: Allow compression if necessary

Specifying only "none" as compression method causes the exchange to fail if
the server doesn't support "none".

Use the same options as OpenSSH does by default. The Compression=yes/no option
in the config file overrides them if specified.

Setting the options explicitly can be dropped in the future after libssh
adjusts its built-in defaults.

(cherry picked from commit c5a9722de86f111ded36488e9bb676a70e80aea0)
---
 sftp/kio_sftp.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sftp/kio_sftp.cpp b/sftp/kio_sftp.cpp
index 1afc51f5..c90aab76 100644
--- a/sftp/kio_sftp.cpp
+++ b/sftp/kio_sftp.cpp
@@ -592,13 +592,13 @@ Result SFTPInternal::sftpOpenConnection(const AuthInfo &info)
         return Result::fail(KIO::ERR_INTERNAL, i18n("Could not disable Nagle's Algorithm."));
     }
 
-    // Don't use any compression
-    rc = ssh_options_set(mSession, SSH_OPTIONS_COMPRESSION_C_S, "none");
+    // Prefer not to use compression
+    rc = ssh_options_set(mSession, SSH_OPTIONS_COMPRESSION_C_S, "none,zlib@openssh.com,zlib");
     if (rc < 0) {
         return Result::fail(KIO::ERR_INTERNAL, i18n("Could not set compression."));
     }
 
-    rc = ssh_options_set(mSession, SSH_OPTIONS_COMPRESSION_S_C, "none");
+    rc = ssh_options_set(mSession, SSH_OPTIONS_COMPRESSION_S_C, "none,zlib@openssh.com,zlib");
     if (rc < 0) {
         return Result::fail(KIO::ERR_INTERNAL, i18n("Could not set compression."));
     }
-- 
2.33.1