[MVC] using session info in middleinfo and parameters passing among handlers

[bluesky1024]

background

I need to add some public operation before and after every request, which is depended on the session.

example

I Read the example about middleware giving as follows.
https://github.com/kataras/iris/tree/master/_examples/mvc/middleware.

func OverviewBeforeMiddleware(ctx iris.Context){
	fmt.Println("use")
	ctx.Next()
}
func OverviewDoneMiddleware(ctx iris.Context){
	fmt.Println("done")
	ctx.Next()
}

app.Use(middleware.OverviewBeforeMiddleware)
app.Done(middleware.OverviewDoneMiddleware)

question

• the middleware handler can only accept the input iris.Context. Is there any possibility the public session be used in the middleware?
• sometimes i want to pass the data handled in the middleware to the controllers' handlers or pass the data handled in the controllers' handlers to the DoneMiddleware. Maybe I can pass param with context, but I don't know if the context used in middleware and controllers' handler is the same one. Besides, is mvc in iris support to do it with other method?

[bluesky1024]

supplement:
according to this issue as follows, the question to passing parameter among handlers is sovled.
#1180.

about the first question:
should i register the global *sessions.Sessions in the middleware package?

[kataras]

Hello @bluesky1024 , sorry for the delay.

Yes, the question is already answered on the issue you posted with v11.2.
At your first question, you can register the same *sessions.Session in your controller as a field and bind it, we have the _examples/mvc/session-controller example.

[bluesky1024]

hello @kataras, thanks for your reply and sorry for not replaying immediately.
As the example shows, the session is registerd in the controllers. Iris provide the function as follows for registering *sessions.session in UserController.

SessManager = sessions.New(sessions.Config{
	Cookie:  "my_session",
	Expires: 24 * time.Hour,
})
app.Register(SessManager.Start)
app.Handle(new(controllers.UserController))

However, i want to use the sessions in the middleware. Is middleware before the controller able to register the same session with some function in iris?

[kataras]

You can call .Start many times, you can store the variables in the Context.Values().Set/Get, you can create a middleware which accepts a Session dependency using the hero dependency container, so yes you can pass it in middleware as well.