实训评测图片无法展示

app/controllers/games_controller.rb

@@ -4,7 +4,6 @@ class GamesController < ApplicationController
   before_action :find_shixun, only: [:show, :answer, :rep_content, :choose_build, :game_build, :game_status]
 
   before_action :allowed, except: [:jupyter]
-  skip_before_action :check_sign, only: [:picture_display]
 
   #require 'iconv'
 

app/controllers/shixuns_controller.rb

@@ -24,7 +24,8 @@ class ShixunsController < ApplicationController
 	before_action :portion_allowed, only: [:copy]
 
 	before_action :special_allowed, only: [:send_to_course, :search_user_courses]
-	before_action :shixun_marker, only: [:new, :create]
+	before_action :shixun_marker, only: [:new, :create
+	skip_before_action :check_sign, only: [:download_file]
 
 	## 获取课程列表
   def index