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_00011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")}
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Go