Function ExtractIPFromRealIPHeader

ip.go:224–237

ExtractIPFromRealIPHeader extracts IP address using `x-real-ip` header. Use this if you put proxy which uses this header.

(options ...TrustOption)

// ExtractIPFromRealIPHeader extracts IP address using `x-real-ip` header.
// Use this if you put proxy which uses this header.
func ExtractIPFromRealIPHeader(options ...TrustOption) IPExtractor {
	checker := newIPChecker(options)
	return func(req *http.Request) string {
		realIP := req.Header.Get(HeaderXRealIP)
		if realIP != "" {
			realIP = strings.TrimPrefix(realIP, "[")
			realIP = strings.TrimSuffix(realIP, "]")
			if ip := net.ParseIP(realIP); ip != nil && checker.trust(ip) {
				return realIP
			}
		}
		return extractIP(req)
	}
}

// ExtractIPFromXFFHeader extracts IP address using `x-forwarded-for` header.
// Use this if you put proxy which uses this header.