Wiki.Quizz.vn

`http.ListenAndServe(addr, handler)` starts a basic HTTP server.

• It listens on `addr` (for example `“:8080”`).
• It serves requests using `handler`.
• If `handler` is `nil`, it uses `http.DefaultServeMux`.

It blocks until the server exits (or returns an error).

• Quick local servers for learning and prototypes.
• Simple services (health checks, internal tools).
• Basic REST APIs when you don’t need custom server settings yet.

package main
 
import (
    "log"
    "net/http"
)
 
func main() {
    http.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
        w.Write([]byte("ok"))
    })
 
    log.Fatal(http.ListenAndServe(":8080", nil))
}

package main
 
import (
    "log"
    "net/http"
)
 
func main() {
    mux := http.NewServeMux()
    mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        w.Write([]byte("hello"))
    })
 
    log.Fatal(http.ListenAndServe(":8080", mux))
}

• Always handle the error returned by `ListenAndServe`.
• `ListenAndServe` is a helper. For production, prefer `http.Server{…}` with timeouts.
• `nil` handler means the global `DefaultServeMux` is used (be careful in large apps).

• net/http
• Middleware
• httptest

• address (addr) /əˈdres/: địa chỉ
• port /pɔːrt/: cổng
• block /blɑːk/: chặn (không thoát)
• helper /ˈhelpər/: hàm tiện ích
• prototype /ˈproʊtətaɪp/: bản thử nghiệm
• global /ˈɡloʊbəl/: toàn cục