loadmiddlewareplugin.go

for _, mid := range v.Middlewares {
   //load middleware plugin
   plug, midErr := plugin.Open(mid.Handler)
   if midErr != nil {
      log.Fatalf(midErr)
      os.Exit(-1)
   }
   //look up the Middleware type
   symMiddleware, midErr := plug.Lookup("Middleware")
   if midErr != nil {
      log.Fatalf(midErr)
      os.Exit(-1)
   }
   //check that loaded symbol is type Middleware
   var middleware Middleware
   middleware, ok := symMiddleware.(Middleware)
   if !ok {
     log.Fatalf("The middleware module have wrong type")
      os.Exit(-1)
   }
   //build the gate function that contain the middleware funcition instance with args
   nmid := Gate(middleware.Pass(mid.Params))
   //append to the middlewares chain
   chain = append(chain, nmid)
}
  // Use all the modules to handle the request
  http.HandleFunc(v.Path, Chain(controller.Fire, chain...))
 }