fix

src/main/java/com/senmesh/sdk/dify/service/DifyClient.java

@@ -102,6 +102,15 @@ public class DifyClient {
         public String getFilename() {
           return request.getFileName();
         }
+
+  /*      @Override
+        public String getDescription() {
+          try {
+            return HttpURLConnection.guessContentTypeFromStream(request.getInputStream());
+          } catch (IOException e) {
+            return null;
+          }
+        }*/
       };
 
       body.add("file", fileResource);