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 404package mainimport ( "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)}
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一只萌萌小番薯
TA贡献1795条经验 获得超7个赞
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")
}
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