diff --git a/app/controllers/myshixuns_controller.rb b/app/controllers/myshixuns_controller.rb
index 035b43955..24c5066e5 100644
--- a/app/controllers/myshixuns_controller.rb
+++ b/app/controllers/myshixuns_controller.rb
@@ -243,55 +243,56 @@ class MyshixunsController < ApplicationController
   # -----Repository
   # TODO: 之类需要一个resubmit参数,但是是关于games.
   def update_file
-    @hide_code = Shixun.where(id: @myshixun.shixun_id).pluck(:hide_code).first
-    tip_exception("技术平台为空!") if @myshixun.mirror_name.blank?
-    path = params[:path].strip unless params[:path].blank?
-    game_id = params[:game_id]
-    game = Game.find(game_id)
-    @content_modified = 0
-    # params[:evaluate] 实训评测时更新必须给的参数，需要依据该参数做性能统计，其它类型的更新可以跳过
-    # 自动保存的时候evaluate为0；点评测的时候为1
-    if params[:evaluate] == 1
-      record = EvaluateRecord.create!(:user_id => current_user.id, :shixun_id => @myshixun.shixun_id, :game_id => game_id)
-      uid_logger("-- game is #{game_id}, record id is #{record.id}, time is **** #{Time.now.strftime("%Y-%m-%d %H:%M:%S.%L")}")
-      student_work_time = format("%.3f",  (Time.now.to_f - record.created_at.to_f)).to_f
-      record.update_attributes!(:student_work => student_work_time)
-    end
-    unless @hide_code
-      # 远程版本库文件内容
-      last_content = GitService.file_content(repo_path: @repo_path, path: path)["content"]
+    begin
+      @hide_code = Shixun.where(id: @myshixun.shixun_id).pluck(:hide_code).first
+      tip_exception("技术平台为空!") if @myshixun.mirror_name.blank?
+      path = params[:path].strip unless params[:path].blank?
+      game_id = params[:game_id]
+      game = Game.find(game_id)
+      @content_modified = 0
+
+      # params[:evaluate] 实训评测时更新必须给的参数，需要依据该参数做性能统计，其它类型的更新可以跳过
+      # 自动保存的时候evaluate为0；点评测的时候为1
+      if params[:evaluate] == 1
+        @sec_key = generate_identifier(EvaluateRecord, 12)
+        record = EvaluateRecord.create!(:user_id => current_user.id, :shixun_id => @myshixun.shixun_id, :game_id => game_id,
+                                        :identifier => @sec_key)
+        uid_logger("-- game build: file update #{@sec_key}, record id is #{record.id}, time is **** #{Time.now.strftime("%Y-%m-%d %H:%M:%S.%L")}")
+      end
+      unless @hide_code
+        # 远程版本库文件内容
+        last_content = GitService.file_content(repo_path: @repo_path, path: path)["content"]
 
-      content =  if @myshixun.mirror_name.select{|a| a.include?("MachineLearning") || a.include?("Python")}.present? && params[:content].present?
-                   params[:content].gsub(/\t/, '    ')
-                 else
-                   params[:content]
-                 end
-      if content != last_content
-        @content_modified = 1
+        content = params[:content]
 
-        author_name = current_user.full_name
-        author_email = current_user.mail
-        message = params[:evaluate] == 0 ? "auto commit" : "task commit"
-        @content = GitService.update_file(repo_path: @repo_path,
-                                          file_path: path,
-                                          message: message,
-                                          content: content,
-                                          author_name: author_name,
-                                          author_email: author_email)
+        if content != last_content
+          @content_modified = 1
 
-        uid_logger("-- file update #{@content}")
+          author_name = current_user.full_name
+          author_email = current_user.mail
+          message = params[:evaluate] == 0 ? "System automatically submitted" : "User submitted"
+          @content = GitService.update_file(repo_path: @repo_path,
+                                            file_path: path,
+                                            message: message,
+                                            content: content,
+                                            author_name: author_name,
+                                            author_email: author_email)
+        end
       end
-    end
 
 
-    if game.status == 2
-      @resubmit = Time.now.to_i
-    end
+      if game.status == 2
+        @resubmit = Time.now.to_i
+      end
 
-    # 评测时间记录
-    if record.present?
-      consume_time = format("%.3f",  (Time.now.to_f - record.created_at.to_f)).to_f
-      record.update_attributes!(:file_update => consume_time)
+      # 评测时间记录
+      if record.present?
+        consume_time = format("%.3f",  (Time.now.to_f - record.created_at.to_f)).to_f
+        record.update_attributes!(:file_update => consume_time)
+      end
+    rescue Exception => e
+      uid_logger_error(e.message)
+      tip_exception("文件内容更新异常，请稍后重试")
     end
   end
 
diff --git a/app/views/myshixuns/update_file.json.jbuilder b/app/views/myshixuns/update_file.json.jbuilder
index c647927c4..ce8426715 100644
--- a/app/views/myshixuns/update_file.json.jbuilder
+++ b/app/views/myshixuns/update_file.json.jbuilder
@@ -1,3 +1,4 @@
 json.content @content
 json.resubmit "#{@resubmit}"
+json.sec_key "#{@sec_key}"
 json.content_modified @hide_code ? false : @content_modified