@@ -0,0 +1,23 @@
+package storage
+
+import (
+	"io"
+	"time"
+)
+
+type File struct {
+	Path         string
+	ContentType  string
+	LastModified time.Time
+	Etag         string
+	Encodings    map[string]io.ReadSeekCloser
+}
+
+func (f *File) AvailableEncodings() []string {
+	encs := make([]string, 0, len(f.Encodings))
+	for enc := range f.Encodings {
+		encs = append(encs, enc)
+	}
+
+	return encs
+}