Refactor: Rename NanoKVM to BatchuKVM and update server URL

server/utils/unzip.go

@@ -0,0 +1,61 @@
+package utils
+
+import (
+	"archive/zip"
+	"io"
+	"os"
+	"path/filepath"
+)
+
+func Unzip(filename string, dest string) error {
+	r, err := zip.OpenReader(filename)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		_ = r.Close()
+	}()
+
+	for _, f := range r.File {
+		dstPath := filepath.Join(dest, filepath.Clean("/"+f.Name))
+		if f.FileInfo().IsDir() {
+			err = os.MkdirAll(dstPath, 0o755)
+			if err != nil {
+				return err
+			}
+		} else {
+			err = unzipFile(dstPath, f)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func unzipFile(dstPath string, f *zip.File) error {
+	err := os.MkdirAll(filepath.Dir(dstPath), 0o755)
+	if err != nil {
+		return err
+	}
+	out, err := os.OpenFile(dstPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, f.Mode())
+	if err != nil {
+		return err
+	}
+	defer func() {
+		_ = out.Close()
+	}()
+
+	archivedFile, err := f.Open()
+	if err != nil {
+		return err
+	}
+
+	if _, err = io.Copy(out, archivedFile); err != nil {
+		return err
+	}
+	if err = os.Chmod(dstPath, f.Mode()); err != nil {
+		return err
+	}
+	return nil
+}