first commit

main.go

+package main
+
+import (
+  "log"
+  "net/http"
+  "encoding/json"
+)
+
+type output struct{}
+
+func (o output) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	jsonOutput, err :=  json.MarshalIndent (r.RemoteAddr, "", " ")
+	if err != nil {
+		w.Write([]byte(err.Error()))
+	}
+	w.Write(jsonOutput)
+}
+
+func main() {
+	log.Fatal(http.ListenAndServe(":8080", output{}))
+}