package main

import (
    "encoding/json"
    "net/http"
)

func main() {
    http.HandleFunc("/", ExampleHandler)
    if err := http.ListenAndServe(":8080", nil); err != nil {
        panic(err)
    }
}

func ExampleHandler(w http.ResponseWriter, r *http.Request) {
    w.Header().Add("Content-Type", "application/json")
    resp, _ := json.Marshal(map[string]string{
        "ip": GetIP(r),
    })
    w.Write(resp)
}

func GetIP(r *http.Request) string {
    forwarded := r.Header.Get("X-FORWARDED-FOR")
    if forwarded != "" {
        return forwarded
    }
    return r.RemoteAddr
}

赏

一只PHP开发的程序猿，偶尔搞搞摄影、画画、写作、顺便睡觉。

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