55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"net/http"
|
||
|
|
"os"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
func getClientIP(r *http.Request) string {
|
||
|
|
// Check common headers for real client IP
|
||
|
|
if ip := r.Header.Get("X-Real-Ip"); ip != "" {
|
||
|
|
return ip
|
||
|
|
}
|
||
|
|
if forwardedFor := r.Header.Get("X-Forwarded-For"); forwardedFor != "" {
|
||
|
|
ips := strings.Split(forwardedFor, ",")
|
||
|
|
return strings.TrimSpace(ips[0])
|
||
|
|
}
|
||
|
|
// Fallback to remote address
|
||
|
|
return r.RemoteAddr
|
||
|
|
}
|
||
|
|
|
||
|
|
func handler(w http.ResponseWriter, r *http.Request) {
|
||
|
|
// Set content type
|
||
|
|
w.Header().Set("Content-Type", "text/plain")
|
||
|
|
|
||
|
|
// Get client IP
|
||
|
|
clientIP := getClientIP(r)
|
||
|
|
|
||
|
|
// Write response
|
||
|
|
fmt.Fprintf(w, "Request IP: %s\n", clientIP)
|
||
|
|
fmt.Fprintln(w, "Headers:")
|
||
|
|
|
||
|
|
for name, values := range r.Header {
|
||
|
|
for _, value := range values {
|
||
|
|
fmt.Fprintf(w, "%s: %s\n", name, value)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
// Get the listen address from the environment variable or use default
|
||
|
|
listenAddr := os.Getenv("LISTEN")
|
||
|
|
if listenAddr == "" {
|
||
|
|
listenAddr = "0.0.0.0:8080"
|
||
|
|
}
|
||
|
|
|
||
|
|
http.HandleFunc("/", handler)
|
||
|
|
|
||
|
|
fmt.Printf("Starting server on %s\n", listenAddr)
|
||
|
|
if err := http.ListenAndServe(listenAddr, nil); err != nil {
|
||
|
|
fmt.Printf("Error starting server: %s\n", err)
|
||
|
|
}
|
||
|
|
}
|