31 lines
468 B
Go
31 lines
468 B
Go
package main
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import (
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"fmt"
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"log"
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"net/http"
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)
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func handler(w http.ResponseWriter, r *http.Request) {
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ip := GetRealIP(r)
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fmt.Fprintf(w, ip)
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}
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func GetRealIP(r *http.Request) string {
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IP := r.Header.Get("X-Real-IP")
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if IP == "" {
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IP = r.Header.Get("X-Forwarder-For")
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}
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if IP == "" {
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IP = r.RemoteAddr
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}
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if IP == "" {
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IP = "No IPV4 address"
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}
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return IP
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}
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func main() {
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http.HandleFunc("/", handler)
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log.Fatal(http.ListenAndServe(":8081", nil))
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}
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