diff --git a/11.rb b/11.rb
new file mode 100644
index 0000000000000000000000000000000000000000..6f9d20497fd9cd45d86452381b7c3d116e49bebc
--- /dev/null
+++ b/11.rb
@@ -0,0 +1,109 @@
+# frozen_string_literal: true
+
+class SwaggerController < ApplicationController
+  include SwaggerHelper
+
+  before_action :i18n_to_chinese
+
+  layout 'swagger'
+
+  def index
+    gon.doc_version = doc_version
+
+    if api_v8? && cookies[:enterprise_access_token].blank?
+      return @auth_url = get_auth_url if params[:code].blank?
+      cookies[:enterprise_access_token] = get_access_token
+      redirect_to '/api/v8/swagger'
+    elsif api_v5? && cookies[:access_token].blank?
+      return @auth_url = get_auth_url if params[:code].blank?
+      cookies[:access_token] = get_access_token
+      redirect_to '/api/v5/swagger'
+    elsif api_v1? && cookies[:access_token].blank?
+      return @auth_url = get_auth_url if params[:code].blank?
+      cookies[:access_token] = get_access_token
+      redirect_to '/api/v1/swagger'
+    end
+  rescue => e
+    Gitee::AppLogger.info "#{self.class.name}##{__method__}: #{e}"
+  end
+
+  def oauth
+
+  end
+
+  def doc_json
+    if api_v5? && params[:from] == 'file'
+      result = Rails.root.join('public/swagger/v5.json').read
+      result.sub!('"gitee.com"', "\"#{Settings.gitlab.host}\"") # host
+      result.sub!('https://gitee.com/oauth/authorize', "#{Settings.gitlab.host_with_protocol}/oauth/authorize")
+      result.sub!('https://gitee.com/oauth/token', "#{Settings.gitlab.host_with_protocol}/oauth/token")
+      return render json: result, layout: false
+    end
+
+    if Rails.env.development?
+      result = Net::HTTP.get(URI.parse(swagger_doc_url))
+    else
+      result =  Rails.cache.fetch("API_DOC_#{get_host}_#{doc_version}", expires_in: 12.hour) do
+        Net::HTTP.get(URI.parse(swagger_doc_url))
+      end
+    end
+    render json: result, layout: false
+  end
+
+  def doc_version
+    if api_v8?
+      ApiEnterprise::DOC_VERSION
+    elsif api_v1?
+      ApiV1::DOC_VERSION
+    else
+      ApiVv5::DOC_VERSION
+    end
+  end
+
+  def swagger_doc_url
+    if api_v8?
+      "#{get_host_url}/enterprises/swagger_doc.json"
+    elsif api_v1?
+      "#{get_host_url}/api/v1/swagger_doc.json"
+    else
+      "#{get_host_url}/api/v5/swagger_doc.json"
+    end
+  end
+
+  private
+
+  def get_access_token
+    body = RestClient.post("#{get_host_url}/oauth/token", system_application_oauth)
+    {
+      value: JSON.parse(body)['access_token'],
+      expires: 1.day.from_now
+    }
+  end
+
+  def i18n_to_chinese
+    I18n.locale = 'zh-CN'
+  end
+
+  def swagger_config
+    if api_v8?
+      Settings.enterprise_swagger.symbolize_keys
+    else
+      Settings.swagger.symbolize_keys
+    end
+  end
+
+  def get_auth_url
+    hash = swagger_config.slice(:client_id, :redirect_uri)
+    hash[:redirect_uri] = hash[:redirect_uri].sub('v5', 'v1') if api_v1?
+    hash[:response_type] = 'code'
+    "/oauth/authorize?#{URI.encode_www_form(hash)}"
+  end
+
+  def system_application_oauth
+    hash = swagger_config.slice(:client_id, :client_secret,:redirect_uri)
+    hash[:redirect_uri] = hash[:redirect_uri].sub('v5', 'v1') if api_v1?
+    hash[:grant_type] = 'authorization_code'
+    hash[:code] = params[:code]
+    hash
+  end
+end