mux/stack.go

package mux

import "net/http"

// stack middlewares(http handler) in order they are passed (FIFO)
func stack(endpoint http.Handler, middlewares []func(http.Handler) http.Handler) http.Handler {
	// Return ahead of time if there aren't any middlewares for the chain
	if len(middlewares) == 0 {
		return endpoint
	}

	// wrap the end handler with the middleware chain
	h := middlewares[len(middlewares)-1](endpoint)
	for i := len(middlewares) - 2; i >= 0; i-- {
		h = middlewares[i](h)
	}

	return h
}