Add Tus-Method-Override header

handler.go

@@ -121,6 +121,13 @@ func NewHandler(config Config) (*Handler, error) {
 
 // Implement the http.Handler interface.
 func (handler *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	// Allow overriding the HTTP method. The reason for this is
+	// that some libraries/environments to not support PATCH and
+	// DELETE requests, e.g. Flash in a browser and parts of Java
+	if newMethod := r.Header.Get("Tus-Method-Override"); newMethod != "" {
+		r.Method = newMethod
+	}
+
 	go logger.Println(r.Method, r.URL.Path)
 
 	header := w.Header()