中间件使用

1. 声明一个中间件方法

   如果要继续执行， handlerFunc() 就需要使用

   echoMiddleware := uc.MiddlewareInterceptor(func(writer uc.ResponseWriter, request uc.Request, handlerFunc uc.HandlerFunc) {
    log.Println(request.URL.Query().Get("echo"))
    writer.Data("echo middle").Send()
    handlerFunc(writer, request) // here
   })
   

2. 加入到中间件群组

   middleware := uc.MiddlewareChain{
    echoMiddleware,
   }
   

3. 进行使用，2种方法都能使用
   • 普通路由

     r.Get("test_middle", middleware.Handler(func(writer uc.ResponseWriter, request uc.Request) {
       writer.Data("hello world").Send()
     }))
     

   • 普通路由

     r.Get("echo", func(writer uc.ResponseWriter, request uc.Request) {
       writer.Data("hello new_middle echo").Send()
     }, middleware)
     

   • 群组路由

     r.Group("new_middle", func(groups *uc.Groups) {
       groups.Get("echo", func(writer uc.ResponseWriter, request uc.Request) {
           writer.Data("hello new_middle echo").Send()
       }, logMiddlewareGroup)
     }, middleware)