Function DetectCDN

scanner.go:312–334

DetectCDN 检测是否使用CDN（通用实现）

(domain string)

// DetectCDN 检测是否使用CDN（通用实现）
func DetectCDN(domain string) bool {
	// 首先检测Cloudflare
	if DetectCloudflareCDN(domain) {
		return true
	}
	
	// 常见CDN提供商的标识
	cdnProviders := []string{
		"cloudflare", "amazonaws", "fastly", "maxcdn", "keycdn",
		"jsdelivr", "unpkg", "cdnjs", "bootstrapcdn", "fontawesome",
		"akamai", "edgecast", "chinacache", "qiniu", "upyun",
	}
	
	// 简单的域名匹配检测
	lowerDomain := strings.ToLower(domain)
	for _, provider := range cdnProviders {
		if strings.Contains(lowerDomain, provider) {
			return true
		}
	}
	
	return false
}

// CheckDomainConnectivity 检查域名连通性 - 通过ping域名来测试
func CheckDomainConnectivity(domain string) bool {