How to pass parameters from middleware to controller

php editor Baicao introduces you how to pass parameters from middleware to controller. During the development process, we often need to obtain some parameters in the middleware and then pass these parameters to the controller for subsequent processing. To achieve this functionality, we can pass parameters to the controller by using the with method of the $request object in the middleware. First, we need to get the parameters in the middleware, then use the with method of the $request object to add the parameters to the request object, and finally get these parameters in the controller through the input method of the $request object. In this way, we successfully passed the parameters from the middleware to the controller. This method is simple and easy to implement and meets our needs. Hope this method helps you!

Question content

I am building a Web API using the Echo Labstack framework. I have a middleware in my route to check user authentication, but then I'm having trouble passing the data to the controller and can't find any relevant information in Google and SO.

route.go

func Routes(e *echo.Echo) {
    e.(middlewareAuthorise)
    user := e.Group("/user")
    user.GET("/profile", controllers.UserProfile)
}

func middlewareAuthorise(next echo.HandlerFunc) echo.HandlerFunc {
    return func(c echo.Context) error {
        // Do some authentication here with access token and get user ID
        auth := controllers.Auth(c, 1)
        if auth["status"] != 200 {
            return c.JSON(401, map[string]any{"status": 401})
        }

        user_id := auth["user_id"]
        // I want to pass user_id to my controllers
        return next(c, user_id)
    }
}

controllers.go

func UserProfile(c echo.Context) error {
    // I want to get the user_id here from middleware
    return c.JSON(200, map[string]any{
        "user_id": user_id,
    })
}

I've searched and tried multiple combinations all day and can't find anything that works. How can I pass parameters from middleware to my controller in the most efficient way?

Workaround

You can use the context's Set and Get methods.

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