update once

pkg/utils/utils.go

@@ -0,0 +1,45 @@
+package utils
+
+import "strings"
+
+func ParseRules(rulesRaw []string) [][]string {
+	var rules [][]string
+	for _, r := range rulesRaw {
+		if r == "" {
+			continue
+		}
+		if !strings.HasSuffix(r, ".") {
+			r += "."
+		}
+		rules = append(rules, strings.Split(r, "."))
+	}
+	return rules
+}
+
+func HasMatchedRule(rules [][]string, domain string) bool {
+	var hasMatch bool
+OUTER:
+	for _, m := range rules {
+		domainSplited := strings.Split(domain, ".")
+		i := len(m) - 1
+		j := len(domainSplited) - 1
+		// 从根域名开始匹配
+		for i >= 0 && j >= 0 {
+			if m[i] != domainSplited[j] && m[i] != "" {
+				continue OUTER
+			}
+			i--
+			j--
+		}
+		// 如果规则中还有剩余，但是域名已经匹配完了，检查规则最后一位是否是任意匹配
+		if j != -1 && i == -1 && m[0] != "" {
+			continue OUTER
+		}
+		hasMatch = i == -1
+		// 如果匹配到了，就不用再匹配了
+		if hasMatch {
+			break
+		}
+	}
+	return hasMatch
+}