fix

go.mod

@@ -0,0 +1,3 @@
+module liwanglin
+
+go 1.21.1

main.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"net/http"
+)
+
+func main() {
+	var host string
+	var port int
+	flag.StringVar(&host, "h", "127.0.0.1", "IP地址")
+	flag.IntVar(&port, "p", 9000, "端口")
+	flag.Parse()
+	address := fmt.Sprintf("%s:%d", host, port)
+	http.HandleFunc("/ping", func(writer http.ResponseWriter, request *http.Request) {
+		_, _ = fmt.Fprintln(writer, fmt.Sprintf("%s by %s", "pong", address))
+	})
+	http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) {
+		_, _ = fmt.Fprintln(writer, fmt.Sprintf("%s by %s", "hello world", address))
+	})
+	err := http.ListenAndServe(address, nil)
+	if nil != err {
+		panic(err)
+	}
+}