Consider using c.ClientIP() from Gin in middleware about limiter HOT 3 CLOSED

func (c *Context) ClientIP() string {
	if c.engine.ForwardedByClientIP {
		clientIP := c.requestHeader("X-Forwarded-For")
		if index := strings.IndexByte(clientIP, ','); index >= 0 {
			clientIP = clientIP[0:index]
		}
		clientIP = strings.TrimSpace(clientIP)
		if len(clientIP) > 0 {
			return clientIP
		}
		clientIP = strings.TrimSpace(c.requestHeader("X-Real-Ip"))
		if len(clientIP) > 0 {
			return clientIP
		}
	}

	if c.engine.AppEngine {
		if addr := c.requestHeader("X-Appengine-Remote-Addr"); addr != "" {
			return addr
		}
	}

	if ip, _, err := net.SplitHostPort(strings.TrimSpace(c.Request.RemoteAddr)); err == nil {
		return ip
	}

	return ""
}