Subrouters and middlewares

[fasmat]

Hi everyone,

I have a situation where I want to add middlewares to all routes except some that start with a specific pattern. This is the code I'm currently using:

r := mux.NewRouter()

r.Use(MW1)

r.Use(MW2)

r.Handle(...)

// some more handlers ...

r.Handle(...)

sub := r.PathPrefix("/static").Subrouter()

sub.Use(MW3)

sub.PathPrefix("/").Handler(http.FileServer(...)) // serve from filesystem on this route

I want to have MW3 only executed on the static route, which works perfectly fine. MW1 and MW2 should be execute everywhere BUT on the static route. Is there any way to easily achieve this?

Thanks for any help in advance

[rol...@gmail.com]

Hello,

you could write a function e.g. addHandler(r, routeToAdd) and apply different r.Use(...) and r.Handle(...) calls based of  string matching:

match, _ := regexp.MatchString("/static", "/static")

if match {

   

} else {

   // non-static

}

This function would be then called for all route strings.

BR,

Roland

[fasmat]

Hi Roland,

thanks for your suggestion! We tried this approach but want to move the subrouter configuration to it's own package (we want to share it between multiple applications) and avoid having "/static" defined in multiple places. So we tried the following:

r := mux.NewRouter()

// globally used middlewares (e.g. logging)

r.Use(GlobalMW)

sub1 := r.PathPrefix("/").Subrouter()

sub1.Use(MW1)

sub1.Use(MW2)

sub1.Handle(...)

sub1.Handle(...)

sub2 := r.PathPrefix("/static").Subrouter()

sub2.Use(MW3)

sub2.PathPrefix("/").Handler(http.FileServer(...)) // serve from filesystem on this route

This seems to work for us for now.

Thanks,

fasmat