diff --git a/cim-boot-server/libs/cim-server-sdk-netty-4.2.0.jar b/cim-boot-server/libs/cim-server-sdk-netty-4.2.0.jar
index 9ddb9cd..6b6f794 100644
Binary files a/cim-boot-server/libs/cim-server-sdk-netty-4.2.0.jar and b/cim-boot-server/libs/cim-server-sdk-netty-4.2.0.jar differ
diff --git a/cim-server-sdk/src/main/java/com/farsunset/cim/model/SentBody.java b/cim-server-sdk/src/main/java/com/farsunset/cim/model/SentBody.java
index b0cc4a0..907b66a 100644
--- a/cim-server-sdk/src/main/java/com/farsunset/cim/model/SentBody.java
+++ b/cim-server-sdk/src/main/java/com/farsunset/cim/model/SentBody.java
@@ -55,6 +55,10 @@ public class SentBody implements Serializable {
 		return data.get(key);
 	}
 
+	public String get(String key,String defaultValue) {
+		return data.getOrDefault(key,defaultValue);
+	}
+
 	public long getTimestamp() {
 		return timestamp;
 	}