Merge branch 'dev_aliyun' of https://bdgit.educoder.net/Hjqreturn/educoder into dev_aliyun

app/controllers/attachments_controller.rb

@@ -22,7 +22,7 @@ class AttachmentsController < ApplicationController
       send_file absolute_path(local_path(@file)),filename: @file.title, disposition: 'inline',type: 'application/pdf'
     elsif type_attachment == "MP4"
       response.header["Accept-Ranges"] = "bytes"
-      send_file absolute_path(local_path(@file)),filename: @file.title,type: @file.content_type.presence || 'application/octet-stream', x_sendfile: true
+      send_file absolute_path(local_path(@file)),filename: @file.title,type: @file.content_type.presence || 'application/octet-stream'
     else
       send_file(absolute_path(local_path(@file)), filename: @file.title,stream:false, type: @file.content_type.presence || 'application/octet-stream')
     end