fix bug

app/controllers/zips_controller.rb

@@ -21,7 +21,10 @@ class ZipsController < ApplicationController
 
     file_name = filename_for_content_disposition(exercises.filename)
 
-    send_file exercises.ex_zip, filename: file_name, type: 'application/zip'
+    Rails.logger.info("################___________file_name________________###########{file_name}")
+    Rails.logger.info("################___________exercises.filename________________###########{exercises.filename}")
+
+    send_file exercises.ex_zip, filename: file_name.encode(Encoding.default_external, 'gb2312'), type: 'application/zip'
   rescue Exception => e
     normal_status(-1, e.message)
   end