golang 构建Web服务器

main.go

package main

import (
    "fmt"
	"log"
	"net/http"
)

func loggingMiddleware(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		log.Printf("%s %s\n", r.Method, r.URL.Path)
		next.ServeHTTP(w, r)
	})
}

func helloHandler(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintln(w, "Hello, with middleware!")
}

func main() {
	mux := http.NewServeMux()
	mux.HandleFunc("/", helloHandler)

	server := &http.Server{
		Addr:    ":8080",
		Handler: loggingMiddleware(mux),
	}

	log.Println("Starting server on :8080...")
	if err := server.ListenAndServe(); err != nil {
		log.Fatal(err)
	}
}