[pve-devel] [PATCH pve-storage 1/2] fix #4849: download-url: allow download and decompression of compressed ISOs

[Philipp Hufnagl <p.hufnagl@proxmox.com>]

Signed-off-by: Philipp Hufnagl <p.hufnagl@proxmox.com>
---
 src/PVE/API2/Storage/Status.pm | 20 ++++++++++++++++++--
 src/PVE/Storage.pm             | 22 ++++++++++++++++++++++
 2 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/src/PVE/API2/Storage/Status.pm b/src/PVE/API2/Storage/Status.pm
index e4ce698..9ac4660 100644
--- a/src/PVE/API2/Storage/Status.pm
+++ b/src/PVE/API2/Storage/Status.pm
@@ -578,6 +578,11 @@ __PACKAGE__->register_method({
 		requires => 'checksum-algorithm',
 		optional => 1,
 	    },
+	    compression => {
+		description => "The compression algorithm used to compress",
+		type => 'string',
+		optional => 1,
+	    },
 	    'checksum-algorithm' => {
 		description => "The algorithm to calculate the checksum of the file.",
 		type => 'string',
@@ -642,14 +647,25 @@ __PACKAGE__->register_method({
 	    http_proxy => $dccfg->{http_proxy},
 	};
 
-	my ($checksum, $checksum_algorithm) = $param->@{'checksum', 'checksum-algorithm'};
+	my ($checksum, $checksum_algorithm, $compression) = $param->@{'checksum', 'checksum-algorithm', 'compression'};
 	if ($checksum) {
 	    $opts->{"${checksum_algorithm}sum"} = $checksum;
 	    $opts->{hash_required} = 1;
 	}
 
 	my $worker = sub {
-	    PVE::Tools::download_file_from_url("$path/$filename", $url, $opts);
+	    my $save_to = "$path/$filename";
+	    die "refusing to override existing file $save_to \n" if -e $save_to ;
+	    $save_to .= ".$compression" if $compression;
+	    PVE::Tools::download_file_from_url($save_to, $url, $opts);
+	    if($compression)
+	    {
+		my $decrypton_error = PVE::Storage::decompress_iso($compression, $save_to);
+		print $decrypton_error if $decrypton_error;
+		unlink $save_to;
+
+
+	    }
 	};
 
 	my $worker_id = PVE::Tools::encode_text($filename); # must not pass : or the like as w-ID
diff --git a/src/PVE/Storage.pm b/src/PVE/Storage.pm
index b99ed35..0c62cc8 100755
--- a/src/PVE/Storage.pm
+++ b/src/PVE/Storage.pm
@@ -1532,6 +1532,11 @@ sub decompressor_info {
 	    lzo => ['lzop', '-d', '-c'],
 	    zst => ['zstd', '-q', '-d', '-c'],
 	},
+	iso => {
+	    gz =>  ['zstd', '-q', '-d'],
+	    zst => ['zstd', '-q', '-d'],
+	    lzo => ['lzop', '-q', '-d'],
+	},
     };
 
     die "ERROR: archive format not defined\n"
@@ -1611,6 +1616,23 @@ sub archive_auxiliaries_remove {
     }
 }
 
+sub decompress_iso
+{
+    my ($compression, $file) = @_;
+
+    my $raw = '';
+    my $out = sub {
+	my $output = shift;
+	$raw .= "$output\n";
+    };
+
+    my $info = decompressor_info('iso', $compression);
+    my $decompressor = $info->{decompressor};
+    
+     run_command([@$decompressor, $file], outfunc => $out);
+     return wantarray ? ($raw, undef) : $raw;
+}
+
 sub extract_vzdump_config_tar {
     my ($archive, $conf_re) = @_;
 
-- 
2.39.2