diff --git a/src/EngineEntrance.js b/src/EngineEntrance.js
index c4dd424..ed2cf9e 100644
--- a/src/EngineEntrance.js
+++ b/src/EngineEntrance.js
@@ -35,7 +35,7 @@ import QuestionApe from 'apes/QuestionApe';
 import UTF8 from 'utf-8';
 
 let loger = Loger.getLoger('McuClient');
-let _sdkInfo = { "version": "v1.50.8.20170724", "author": "www.3mang.com" };
+let _sdkInfo = { "version": "v1.51.0.20170724", "author": "www.3mang.com" };
 
 //APE
 let _sass;
@@ -1885,7 +1885,7 @@ export default class MessageEntrance extends Emiter {
             "status": 0,
             "creatUserId": value.creatUserId,
             "creatUserName": value.createUserName,
-            "url": value.url,
+            "url": value.url||value.absoluteLocation,//伴音上传的接口有差异，课堂内上传返回的是url字段，后台带入的字段是absoluteLocation
             "fileType": value.type,
             "fileId": "" + value.id,
             "fileName": value.name,