我編寫了一個簡單的 http HandleFunc，需要 2 秒來處理，然后我向服務器發送一個超時 1 秒的請求。我希望調用 ResponseWriter.Write 會返回一個錯誤，但它不會。請為我解釋一下。服務器代碼：import (    "log"    "net/http"    "time")func main() {    log.SetFlags(log.Ltime | log.Lshortfile)    handler := http.NewServeMux()    handler.HandleFunc("/long-task",        func(w http.ResponseWriter, r *http.Request) {            go func() {                <-r.Context().Done()                log.Println("client closed or server responded")            }()            log.Println("handling long-task")            time.Sleep(2 * time.Second)            n, err := w.Write([]byte("my slow response"))            if err != nil {                log.Println("error when ResponseWriter Write: ", err)            }            log.Printf("responded to long-task. n: %v\n", n)        })    server := &http.Server{Addr: ":8008", Handler: handler}    log.Println("listening on port ", server.Addr)    err := server.ListenAndServe()    if err != nil {        log.Fatal(err)    }}客戶端代碼：package mainimport (    "io/ioutil"    "log"    "net/http"    "time")func main() {    client := http.Client{Timeout: 1 * time.Second}    r, _ := http.NewRequest("GET", "http://127.0.0.1:8008/long-task", nil)    w, err := client.Do(r)    if err != nil {        log.Fatal(err)    }    defer w.Body.Close()    body, err := ioutil.ReadAll(w.Body)    if err != nil {        log.Fatal(err)    }    log.Printf("response: %s\n", body)}服務器輸出：10:50:58 http_server.go:28: listening on port  :800810:51:01 http_server.go:19: handling long-task10:51:02 http_server.go:17: client closed or server responded10:51:03 http_server.go:25: responded to long-task. n: 16客戶端輸出：2020/05/27 10:51:02 Get "http://127.0.0.1:8008/long-task": context deadline exceeded (Client.Timeout exceeded while awaiting headers)