maybe.go

package middleware

import "net/http"

// Maybe middleware will allow you to change the flow of the middleware stack execution depending on return
// value of maybeFn(request). This is useful for example if you'd like to skip a middleware handler if
// a request does not satisfied the maybeFn logic.
func Maybe(mw func(http.Handler) http.Handler, maybeFn func(r *http.Request) bool) func(http.Handler) http.Handler {
	return func(next http.Handler) http.Handler {
		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			if maybeFn(r) {
				mw(next).ServeHTTP(w, r)
			} else {
				next.ServeHTTP(w, r)
			}
		})
	}
}