优化代码

internal/utils/net_utils.go

@@ -0,0 +1,52 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package utils
+
+import (
+	"net"
+	"sort"
+)
+
+// ParseAddrHost 分析地址中的主机名部分
+func ParseAddrHost(addr string) string {
+	if len(addr) == 0 {
+		return addr
+	}
+
+	host, _, err := net.SplitHostPort(addr)
+	if err != nil {
+		return addr
+	}
+	return host
+}
+
+// MergePorts 聚合端口
+// 返回 [ [fromPort, toPort], ... ]
+func MergePorts(ports []int) [][2]int {
+	if len(ports) == 0 {
+		return nil
+	}
+
+	sort.Ints(ports)
+
+	var result = [][2]int{}
+	var lastRange = [2]int{0, 0}
+	var lastPort = -1
+	for _, port := range ports {
+		if port <= 0 /** 只处理有效的端口 **/ || port == lastPort /** 去重 **/ {
+			continue
+		}
+
+		if lastPort < 0 || port != lastPort+1 {
+			lastRange = [2]int{port, port}
+			result = append(result, lastRange)
+		} else { // 如果是连续的
+			lastRange[1] = port
+			result[len(result)-1] = lastRange
+		}
+
+		lastPort = port
+	}
+
+	return result
+}