init

.gitignore

@@ -0,0 +1 @@
+echo.exe

go.mod

@@ -0,0 +1,3 @@
+module echo
+
+go 1.22.4

main.go

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+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+)
+
+var name string
+
+func main() {
+	hostname, err := os.Hostname()
+	if err != nil {
+		log.Println("got hostname error:", err)
+	}
+
+	name = hostname
+
+	http.HandleFunc("/echo", echoHandler)
+
+	fmt.Println("Starting server on :8080")
+	if err := http.ListenAndServe(":8080", nil); err != nil {
+		log.Fatal(err)
+	}
+
+}
+
+func echoHandler(w http.ResponseWriter, r *http.Request) {
+	clientIp := getRemoteIP(r)
+	fmt.Fprintf(w, "hello %s Host %s provides services", clientIp, name)
+}
+
+func getRemoteIP(r *http.Request) string {
+	return r.RemoteAddr
+}