split helper http utilities

internal/helper/cloudflare.go

@@ -0,0 +1,37 @@
+package helper
+
+import "strings"
+
+// IsCloudflareChallenge checks if the HTML content is a Cloudflare challenge page.
+func IsCloudflareChallenge(html string) bool {
+	challengeTitles := []string{
+		"Just a moment...",
+		"请稍候…",
+		"DDOS-GUARD",
+	}
+	challengeSelectors := []string{
+		"#cf-challenge-running",
+		".ray_id",
+		".attack-box",
+		"#cf-please-wait",
+		"#challenge-spinner",
+		"#trk_jschal_js",
+	}
+
+	lowerHTML := strings.ToLower(html)
+	for _, title := range challengeTitles {
+		titleLower := strings.ToLower(title)
+		if strings.Contains(lowerHTML, strings.ToLower("<title>"+title)) ||
+			strings.Contains(lowerHTML, titleLower) {
+			return true
+		}
+	}
+
+	for _, selector := range challengeSelectors {
+		if strings.Contains(lowerHTML, strings.ToLower(selector)) {
+			return true
+		}
+	}
+
+	return false
+}