diff --git a/broker/src/main/java/com/xiaoleilu/loServer/action/Action.java b/broker/src/main/java/com/xiaoleilu/loServer/action/Action.java
index 1b72fad6..1296894b 100755
--- a/broker/src/main/java/com/xiaoleilu/loServer/action/Action.java
+++ b/broker/src/main/java/com/xiaoleilu/loServer/action/Action.java
@@ -8,9 +8,13 @@
 
 package com.xiaoleilu.loServer.action;
 
+import cn.wildfirechat.common.IMExceptionEvent;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
+import com.google.gson.JsonSyntaxException;
 import com.xiaoleilu.loServer.RestResult;
+import com.xiaoleilu.loServer.action.channel.ChannelAction;
+import com.xiaoleilu.loServer.action.robot.RobotAction;
 import com.xiaoleilu.loServer.annotation.RequireAuthentication;
 import com.xiaoleilu.loServer.handler.Request;
 import com.xiaoleilu.loServer.handler.Response;
@@ -23,7 +27,10 @@ import io.netty.handler.codec.http.FullHttpRequest;
 import io.netty.handler.codec.http.HttpRequest;
 import io.netty.handler.codec.http.HttpResponseStatus;
 import cn.wildfirechat.common.ErrorCode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import win.liyufan.im.RateLimiter;
+import win.liyufan.im.Utility;
 
 import java.nio.charset.StandardCharsets;
 
@@ -38,6 +45,7 @@ import static io.moquette.BrokerConstants.*;
  */
 
 abstract public class Action {
+    private static final Logger LOG = LoggerFactory.getLogger(Action.class);
     public static IMessagesStore messagesStore = null;
     public static ISessionsStore sessionsStore = null;
     protected static final Gson gson = new GsonBuilder().disableHtmlEscaping().create();
@@ -153,9 +161,22 @@ abstract public class Action {
             FullHttpRequest fullHttpRequest = (FullHttpRequest) request;
             byte[] bytes = Utils.readBytesAndRewind(fullHttpRequest.content());
             String content = new String(bytes, StandardCharsets.UTF_8);//contribute by JiaRG from github
-            
-            T t = gson.fromJson(content, cls);
-            return t;
+
+            try {
+                T t = gson.fromJson(content, cls);
+                return t;
+            } catch (JsonSyntaxException e) {
+                e.printStackTrace();
+                LOG.error("Object {} from json {} failure", cls.getName(), content);
+                int exception = IMExceptionEvent.EventType.ADMIN_API_Exception;
+                if (this instanceof RobotAction) {
+                    exception = IMExceptionEvent.EventType.ROBOT_API_Exception;
+                } else if (this instanceof ChannelAction) {
+                    exception = IMExceptionEvent.EventType.CHANNEL_API_Exception;
+                }
+                Utility.printExecption(LOG, e, exception);
+                throw new RuntimeException(e);
+            }
         }
         return null;
     }
diff --git a/broker/src/main/java/com/xiaoleilu/loServer/action/channel/ChannelAction.java b/broker/src/main/java/com/xiaoleilu/loServer/action/channel/ChannelAction.java
index 7df035a6..640de752 100644
--- a/broker/src/main/java/com/xiaoleilu/loServer/action/channel/ChannelAction.java
+++ b/broker/src/main/java/com/xiaoleilu/loServer/action/channel/ChannelAction.java
@@ -105,18 +105,6 @@ abstract public class ChannelAction extends Action {
         response.send();
     }
 
-    protected <T> T getRequestBody(HttpRequest request, Class<T> cls) {
-        if (request instanceof FullHttpRequest) {
-            FullHttpRequest fullHttpRequest = (FullHttpRequest) request;
-            byte[] bytes = Utils.readBytesAndRewind(fullHttpRequest.content());
-            String content = new String(bytes, StandardCharsets.UTF_8);
-            
-            T t = gson.fromJson(content, cls);
-            return t;
-        }
-        return null;
-    }
-
     protected void sendApiMessage(Response response, String topic, byte[] message, Callback callback) {
         sendApiMessage(response, channelInfo.getOwner(), topic, message, callback);
     }
diff --git a/broker/src/main/java/com/xiaoleilu/loServer/action/robot/RobotAction.java b/broker/src/main/java/com/xiaoleilu/loServer/action/robot/RobotAction.java
index 2bdcfc22..c8e92312 100644
--- a/broker/src/main/java/com/xiaoleilu/loServer/action/robot/RobotAction.java
+++ b/broker/src/main/java/com/xiaoleilu/loServer/action/robot/RobotAction.java
@@ -106,24 +106,6 @@ abstract public class RobotAction extends Action {
         response.send();
     }
 
-    protected <T> T getRequestBody(HttpRequest request, Class<T> cls) {
-        if (request instanceof FullHttpRequest) {
-            FullHttpRequest fullHttpRequest = (FullHttpRequest) request;
-            byte[] bytes = Utils.readBytesAndRewind(fullHttpRequest.content());
-            String content = null;
-            try {
-                content = new String(bytes, "UTF-8");
-                
-                T t = gson.fromJson(content, cls);
-                return t;
-            } catch (UnsupportedEncodingException e) {
-                e.printStackTrace();
-                Utility.printExecption(LOG, e, IMExceptionEvent.EventType.ROBOT_API_Exception);
-            }
-        }
-        return null;
-    }
-
     protected void sendApiRequest(Response response, String topic, byte[] message, Callback callback) {
         ServerAPIHelper.sendRequest(robot.getUid(), null, topic, message, new ServerAPIHelper.Callback() {
             @Override