[PATCH cluster v4 5/5] cluster files: support registering UTF-8 configuration file

[Fiona Ebner <f.ebner@proxmox.com>]

A configuration file registered as UTF-8 will be automatically decoded
from UTF-8 to Perl's internal string format after reading and encoded
in the other direction before writing.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---

Versioned dependency bump pve-cluster -> pve-common needed!

Changes in v4:
* tell the parser() directly whether the file was registered as UTF-8

 src/PVE/Cluster.pm | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/src/PVE/Cluster.pm b/src/PVE/Cluster.pm
index cd5d6b5..c1e7d4c 100644
--- a/src/PVE/Cluster.pm
+++ b/src/PVE/Cluster.pm
@@ -519,7 +519,7 @@ sub verify_token {
 my $file_info = {};
 
 sub cfs_register_file {
-    my ($filename, $parser, $writer) = @_;
+    my ($filename, $parser, $writer, $options) = @_;
 
     $observed->{$filename} || die "unknown file '$filename'";
 
@@ -529,12 +529,13 @@ sub cfs_register_file {
         parser => $parser,
         writer => $writer,
     };
+    $file_info->{$filename}->{utf8} = 1 if $options && $options->{utf8};
 
     return;
 }
 
 my $ccache_read = sub {
-    my ($filename, $parser, $version) = @_;
+    my ($filename, $parser, $version, $utf8) = @_;
 
     $ccache->{$filename} = {} if !$ccache->{$filename};
 
@@ -544,7 +545,14 @@ my $ccache_read = sub {
         # we always call the parser, even when the file does not exist
         # (in that case $data is undef)
         my $data = get_config($filename);
-        $ci->{data} = &$parser("/etc/pve/$filename", $data);
+        my $options = {};
+
+        if ($utf8) {
+            $data = decode('UTF-8', $data);
+            $options->{utf8} = 1;
+        }
+
+        $ci->{data} = &$parser("/etc/pve/$filename", $data, undef, $options);
         $ci->{version} = $version;
     }
 
@@ -581,7 +589,7 @@ sub cfs_read_file {
     my ($version, $info) = cfs_file_version($filename);
     my $parser = $info->{parser};
 
-    return &$ccache_read($filename, $parser, $version);
+    return &$ccache_read($filename, $parser, $version, $info->{utf8});
 }
 
 sub cfs_write_file {
@@ -599,6 +607,8 @@ sub cfs_write_file {
         $ci->{version} = undef;
     }
 
+    $force_utf8 = 1 if $info->{utf8};
+
     PVE::Tools::file_set_contents($fsname, $raw, undef, $force_utf8);
 }
 
-- 
2.47.3