example cookie on differ ports

go.mod

module local.pc/sand

go 1.18

require github.com/go-chi/chi/v5 v5.0.7

require github.com/davecgh/go-spew v1.1.1

main.go

package main

import (
	"context"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/go-chi/chi/v5"
	"github.com/go-chi/chi/v5/middleware"

	"github.com/davecgh/go-spew/spew"
)

func main() {
	log.SetFlags(log.LstdFlags | log.LUTC | log.Lmsgprefix | log.Lshortfile)
	log.SetPrefix("[default]")

	logger := log.New(log.Writer(), "[main]", log.Flags())

	router := chi.NewRouter()
	router.Use(
		middleware.Recoverer,
		middleware.Logger)

	router.Get("/", http.HandlerFunc(setcookie))

	h1 := http.NewServeMux()
	h1.HandleFunc("/set", setcookie)
	s1 := http.Server{
		Addr:    ":8000",
		Handler: h1,
	}

	h2 := http.NewServeMux()
	h2.HandleFunc("/get", getcookie)
	s2 := http.Server{
		Addr:    ":9000",
		Handler: h2,
	}

	go func() {
		sigCh := make(chan os.Signal, 1)
		signal.Notify(sigCh, syscall.SIGTERM, syscall.SIGINT)
		<-sigCh
		logger.Println(s1.Shutdown(context.Background()))
		logger.Println(s2.Shutdown(context.Background()))
	}()

	logger.Printf("server listening on [%s]\n", s1.Addr)
	go s1.ListenAndServe()
	s2.ListenAndServe()
}

func setcookie(rw http.ResponseWriter, _ *http.Request) {
	http.SetCookie(rw, &http.Cookie{
		Name:     "mycookie",
		Value:    "email=mail@e.com",
		Path:     "/",
		Domain:   "localhost",
		Expires:  time.Now().UTC().Add(5 * time.Hour),
		MaxAge:   int(1000 * time.Second),
		Secure:   true,
		HttpOnly: true,
		SameSite: 1,
	})
}

func getcookie(rw http.ResponseWriter, r *http.Request) {
	spew.Fdump(rw, r.Cookies())
}