Initial upload to github

server.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+)
+
+func handler(w http.ResponseWriter, r *http.Request) {
+	ip := getIP(w, r)
+	fmt.Fprintf(w, ip)
+}
+
+func getIP(w http.ResponseWriter, r *http.Request) string {
+	IP := r.Header.Get("X-REAL-IP")
+	if IP != "" {
+		return IP
+	} else {
+		return "No IPV4"
+	}
+}
+func main() {
+	http.HandleFunc("/", handler)
+	log.Fatal(http.ListenAndServe(":8081", nil))
+}