Passing Context to Interface Methods

Question

Somewhat inspired by this article last week, I\'m toying with refactoring an application I have to more explicitly pass context (DB pools, session stores, etc) to my handlers.

Answer 1

I would use a closure and do something like this:

func IndexHandler(a *appContext) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *httpRequest) {
        // ... do stuff
        fmt.Fprintf(w, "db is %q and store is %q\n", a.db, a.store)
    })
}

And just use the returned http.Handler.

You'll just have to make sure your appContext is goroutine-safe.