engine: resources: Close files after use

Don't need to wait for gc.

engine/resources/http.go

@@ -247,6 +247,7 @@ func (obj *HTTPServerRes) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 		sendHTTPError(w, err)
 		return
 	}
+	defer handle.Close() // ignore error
 
 	// Determine the last-modified time if we can.
 	modtime := time.Now()
@@ -969,6 +970,12 @@ func (obj *HTTPFileRes) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 		sendHTTPError(w, err)
 		return
 	}
+	//if readSeekCloser, ok := handle.(io.ReadSeekCloser); ok { // same
+	//	defer readSeekCloser.Close() // ignore error
+	//}
+	if closer, ok := handle.(io.Closer); ok {
+		defer closer.Close() // ignore error
+	}
 
 	// Determine the last-modified time if we can.
 	modtime := time.Now()