Refactor: Rename NanoKVM to BatchuKVM and update server URL

server/utils/untar.go

@@ -0,0 +1,82 @@
+package utils
+
+import (
+	"archive/tar"
+	"compress/gzip"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func UnTarGz(srcFile string, destDir string) (string, error) {
+	if err := os.MkdirAll(destDir, 0755); err != nil {
+		return "", err
+	}
+
+	fr, err := os.Open(srcFile)
+	if err != nil {
+		return "", err
+	}
+	defer func() {
+		_ = fr.Close()
+	}()
+
+	gr, err := gzip.NewReader(fr)
+	if err != nil {
+		return "", err
+	}
+	defer func() {
+		_ = gr.Close()
+	}()
+
+	tr := tar.NewReader(gr)
+
+	targetFile := ""
+	for {
+		header, err := tr.Next()
+
+		if err == io.EOF {
+			break
+		}
+
+		if err != nil {
+			return "", err
+		}
+
+		if targetFile == "" {
+			parts := strings.Split(header.Name, "/")
+			if len(parts) > 0 {
+				targetFile = filepath.Join(destDir, parts[0])
+			}
+		}
+
+		filename := filepath.Join(destDir, header.Name)
+
+		switch header.Typeflag {
+		case tar.TypeDir:
+			if err := os.MkdirAll(filename, os.FileMode(header.Mode)); err != nil {
+				return "", err
+			}
+
+		case tar.TypeReg:
+			file, err := os.OpenFile(filename, os.O_CREATE|os.O_RDWR, os.FileMode(header.Mode))
+			if err != nil {
+				return "", err
+			}
+
+			if _, err := io.Copy(file, tr); err != nil {
+				_ = file.Close()
+				return "", err
+			}
+			_ = file.Close()
+
+		case tar.TypeSymlink:
+			if err := os.Symlink(header.Linkname, filename); err != nil {
+				return "", err
+			}
+		}
+	}
+
+	return targetFile, nil
+}