// authenticate is an example of middleware that authenticates using basic authentication
func authenticate(h httpctx.Handler) httpctx.Handler {
return httpctx.HandlerFunc(func(ctx context.Context, w http.ResponseWriter, r *http.Request) error {
credentials := r.Header.Get("WWW-Authenticate")
ctx, err := checkCredentials(ctx, credentials)
if err != nil {
return err
}
return h.ServeHTTPContext(ctx, w, r)
})
}
// ensureHttps is an example of middleware that ensures that the request scheme is https.
func ensureHttps(h httpctx.Handler) httpctx.Handler {
return httpctx.HandlerFunc(func(ctx context.Context, w http.ResponseWriter, r *http.Request) error {
if r.URL.Scheme != "https" {
u := *r.URL
u.Scheme = "https"
http.Redirect(w, r, u.String(), http.StatusMovedPermanently)
return nil
}
return h.ServeHTTPContext(ctx, w, r)
})
}
func ensureAdmin(h httpctx.Handler) httpctx.Handler {
return httpctx.HandlerFunc(func(ctx context.Context, w http.ResponseWriter, r *http.Request) error {
// ... get the userid from the context and ensure that the user has admin privilege ...
return h.ServeHTTPContext(ctx, w, r)
})
}