beego中跨域处理代码

 beego.InsertFilter("*", beego.BeforeRouter, cors.Allow(&cors.Options{
  AllowOrigins:     []string{"http://*"},
  AllowMethods:     []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
  AllowHeaders:     []string{"Origin", "Authorization", "Access-Control-Allow-Origin", "Access-Control-Allow-Credentials", "Access-Control-Allow-Headers", "Content-Type"},
  ExposeHeaders:    []string{"Content-Length", "Access-Control-Allow-Origin", "Access-Control-Allow-Headers", "Content-Type", "Access-Control-Allow-Credentials"},
  AllowCredentials: true,
 }))