chore: initial commit

internal/utils/utils.go

@@ -0,0 +1,28 @@
+package utils
+
+import (
+	"net"
+	"net/http"
+	"strings"
+)
+
+func ClientIP(r *http.Request) string {
+	if xff := r.Header.Get("X-Forwarded-For"); xff != "" {
+		parts := strings.Split(xff, ",")
+		if len(parts) > 0 {
+			return strings.TrimSpace(parts[0])
+		}
+	}
+
+	if ip := r.Header.Get("X-Real-IP"); ip != "" {
+		return ip
+	}
+
+	// RemoteAddr: IP:port
+	host, _, err := net.SplitHostPort(r.RemoteAddr)
+	if err == nil {
+		return host
+	}
+
+	return r.RemoteAddr
+}