fixed ci4s oauth2接入

app/controllers/oauth/ci4s_controller.rb

@@ -2,6 +2,10 @@ class Oauth::Ci4sController < Oauth::BaseController
   include RegisterHelper
 
 
+  def oauth_url
+    Ci4s::Service.oauth_url(code)
+  end
+
   # 需要educoder那边设置回调地址
   def create
     begin

app/libs/ci4s/service.rb

@@ -23,6 +23,9 @@ module Ci4s::Service
     config.dig("oauth", "ci4s", "redirect_uri")
   end
 
+  def oauth_url
+    "#{base_url}/oauth/authorize?client_id=#{client_id}&redirect_uri=#{URI.encode_www_form_component(redirect_uri)}&response_type=code&grant_type=authorization_code"
+  end
 
   def request(method, url, params)
     begin