package http

import "strings"

// ApplyClientForwardHeaders 向上游透传客户端 IP 与浏览器 UA。
func ApplyClientForwardHeaders(header map[string]string, clientIP, userAgent string) {
	if header == nil {
		return
	}
	if ip := strings.TrimSpace(clientIP); ip != "" {
		header["X-Real-IP"] = ip
	}
	if ua := strings.TrimSpace(userAgent); ua != "" {
		header["User-Agent"] = ua
	}
}

// ApplyClientForwardHeadersWithXUA 透传 IP、浏览器 UA，以及可选的 X-User-Agent。
func ApplyClientForwardHeadersWithXUA(header map[string]string, clientIP, userAgent, xUserAgent string) {
	ApplyClientForwardHeaders(header, clientIP, userAgent)
	if header == nil {
		return
	}
	if xua := strings.TrimSpace(xUserAgent); xua != "" {
		header["X-User-Agent"] = xua
	}
}