package main

import (
    "fmt"
    "net"
    "net/http"
)

func getMyIP(w http.ResponseWriter, r *http.Request) {
    host, _, _ := net.SplitHostPort(r.RemoteAddr)
    fmt.Fprint(w, host)
    fmt.Printf("Received request from %s\n", host)
}

func main() {
    fmt.Println("Server running on 0.0.0.0:5000")
    http.HandleFunc("/", getMyIP)
    if err := http.ListenAndServe("0.0.0.0:5000", nil); err != nil {
        panic(err)
    }
}