修改了before_filter的作用范围

app/controllers/application_controller.rb

@@ -1149,7 +1149,7 @@ class ApplicationController < ActionController::Base
     redirect_to authorize_url
   end
 
-  def user_login_and_from_openi
+  def user_login_and_from_openi?
     url = request.referer.nil? ? Redmine::Configuration['educoder_domain'] : request.referer
     flag = URI(url).host == URI(Redmine::Configuration['openi_domain']).host && !current_user.logged?
     logger.info "----------------------- request referer: #{request.referer} -------------------------"

app/controllers/challenges_controller.rb

@@ -2,7 +2,7 @@
 class ChallengesController < ApplicationController
   layout "base_shixun"
   # 如要添加或修改before_filter时，请将handle_openi_request这个before_filter放至第一位
-  # before_filter :handle_openi_request, if: -> { user_login_and_from_openi }
+  before_filter :handle_openi_request, if: -> { user_login_and_from_openi? }, only: [:index]
   before_filter :check_authentication, :except => [:index]
   before_filter :find_shixun, :only => [:index, :new, :create, :destroy, :challenge_build, :update_evaluation, :add_choose_question, :new_choose_question,
                                           :choose_type_show, :edit_choose_question, :update_choose_question, :destroy_challenge_choose]

app/controllers/oauth_controller.rb

@@ -154,9 +154,9 @@ class OauthController < ApplicationController
   ####--Start-- 获取Openi的授权码，access_token，以及用户信息。为在openi登录的用户创建相关的educoder用户 ####
   IDENTITY_SITE = Redmine::Configuration['openi_domain']
   ROOT_URL = Redmine::Configuration['educoder_domain']
-  DEFAULT_PASSWORD = "a12345678"
-  TOKEN_CALL_BACK = "/oauth/get_token_callback"
-  USER_INFO = "/oauth/userinfo"
+  DEFAULT_PASSWORD = 'a12345678'.freeze
+  TOKEN_CALL_BACK = '/oauth/get_token_callback'.freeze
+  USER_INFO = '/oauth/userinfo'.freeze
 
   def get_code
     # 从OpenI发过来的回调中获取授权码
@@ -183,6 +183,10 @@ class OauthController < ApplicationController
     openi = Openi.find_by_login(login)
     unless openi
       ActiveRecord::Base.transaction do
+        # 如果Educoder中已存在与该OpenI用户的邮箱相同的用户，则会直接跳转到登录educoder的登录页面
+        existing_user = User.find_by_mail(email)
+        break if existing_user.present?
+
         user = User.new(lastname: name, mail: email, mail_notification: email)
         user.login = custom_openi_login(login)
         user.password = DEFAULT_PASSWORD
@@ -196,7 +200,7 @@ class OauthController < ApplicationController
       end
     end
 
-    self.logged_user = openi.user
+    self.logged_user = openi.user if openi.present? && openi.user.present?
     original_url = params[:original_url]
     redirect_to original_url
   end
@@ -208,7 +212,7 @@ class OauthController < ApplicationController
   private
   # 为了保证新创建的用户用户名不与系统中已存在的用户冲突，加上 _openi 后缀
   def custom_openi_login(login)
-    login + "_openi"
+    login + '_openi'
   end
 
   def require_login

app/controllers/shixuns_controller.rb

@@ -2,8 +2,6 @@
 # REDO: 创建版本库权限控制
 class ShixunsController < ApplicationController
   layout 'base_shixun'
-  # 如要添加或修改before_filter时，请将handle_openi_request这个before_filter放至第一位
-  # before_filter :handle_openi_request, if: -> { user_login_and_from_openi }
   before_filter :require_login, :except => [:ghook, :download_file, :show, :index]
   before_filter :check_authentication, :except => [:ghook, :download_file, :show, :index]
   before_filter :find_shixun, :except => [ :index, :new, :create, :index, :search, :shixun_courses, :new_disscuss, :shixun_migrate, :qrcode, :download_file, :departments, :get_mirror_script, :send_message_to_administrator]

app/controllers/subjects_controller.rb

@@ -2,7 +2,7 @@
 class SubjectsController < ApplicationController
   layout 'base_subject'
   # 如要添加或修改before_filter时，请将handle_openi_request这个before_filter放至第一位
-  # before_filter :handle_openi_request, if: -> { user_login_and_from_openi }
+  before_filter :handle_openi_request, if: -> { user_login_and_from_openi? }, only: [:show]
   before_filter :require_login, :except => [:show, :index]
   before_filter :check_authentication, :except => [:show, :index]
   before_filter :find_subject, :except => [:index, :new, :create, :create_subject, :new_subject, :append_to_stage, :send_to_course]