🐛 Fixing a bug. #825 3.7 token 刷新空指针问题 & 修复方案

pigx-gateway/src/main/java/com/pig4cloud/pigx/gateway/filter/PasswordDecoderFilter.java

@@ -80,6 +80,12 @@ public class PasswordDecoderFilter extends AbstractGatewayFilterFactory {
 				return chain.filter(exchange);
 			}
 
+			// 刷新token，直接向下执行
+			String grantType = request.getQueryParams().getFirst("grant_type");
+			if (StrUtil.equals(SecurityConstants.REFRESH_TOKEN, grantType)) {
+				return chain.filter(exchange);
+			}
+
 			Class inClass = String.class;
 			Class outClass = String.class;
 			ServerRequest serverRequest = ServerRequest.create(exchange,