使用 Go 自定义 404 错误消息

我有这个代码，如果我去 /time/ 会给出我的自定义 404 错误消息，但如果我去 /times/ 或只是 / 或 /whatever 然后我会得到默认的 404 错误消息。我想为除 /time/ 以外的所有情况显示我的自定义 404

package main

import (

"fmt"

"time"

"flag"

"os"

"net/http"

)

const AppVersion = "timeserver version: 3.0"

func timeserver(w http.ResponseWriter, r *http.Request) {

if r.URL.Path != "/time/" {

NotFoundHandler(w, r)

return

}

const layout = "3:04:05 PM"

t := time.Now().Local()

fmt.Fprint(w, "<html>\n")

fmt.Fprint(w, "<head>\n")

fmt.Fprint(w, "<style>\n")

fmt.Fprint(w, "p {font-size: xx-large}\n")

fmt.Fprint(w, "span.time {color: red}\n")

fmt.Fprint(w, "</style>\n")

fmt.Fprint(w, "</head>\n")

fmt.Fprint(w, "<body>\n")

//fmt.Fprint(w, "The time is now " + t.Format(layout))

fmt.Fprint(w, "<p>The time is now <span class=\"time\">" + t.Format(layout) + "</span>.</p>\n")

fmt.Fprint(w, "</body>\n")

fmt.Fprint(w, "</html>\n")

}

func NotFoundHandler(w http.ResponseWriter, r *http.Request) {

fmt.Fprint(w, "custom 404")

}

func main() {

version := flag.Bool("V", false, "prints current version")

port := flag.String("port", "8080", "sets service port number")

flag.Parse()

if *version {

fmt.Println(AppVersion)

os.Exit(0)

}

http.HandleFunc("/time/", timeserver)

http.ListenAndServe("localhost:" + *port, nil)

}

12345678_0001

浏览 167回答 1

1回答

一只萌萌小番薯

将此行添加到主：http.HandleFunc("/", NotFoundHandler)"/" 的处理程序是 catchall 处理程序。此外，您应该修改处理程序以返回 404 状态：func NotFoundHandler(w http.ResponseWriter, r *http.Request) {   w.WriteHeader(http.StatusNotFound)   fmt.Fprint(w, "custom 404")}

随时随地看视频慕课网APP