Example_limitHandlerExecutionTime.go

package main

import (
	"fmt"
	"net/http"
	"net/http/httptest"
	"time"
)

func Example_limitHandlerExecutionTime() {
	heavyHandler := http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		time.Sleep(1 * time.Hour)
	})
	handler := http.TimeoutHandler(heavyHandler, 100*time.Millisecond, "timeout")

	w := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/", nil)
	handler.ServeHTTP(w, req)
	fmt.Println("status code:", w.Code)
	fmt.Println("response body:", w.Body.String())
	// Output:
	// status code: 503
	// response body: timeout
}