init

utils.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"net"
+	"os"
+	"slices"
+	"strconv"
+	"strings"
+)
+
+func matchDomain(host string, list []string) bool {
+	for _, d := range list {
+		if strings.HasSuffix(host, d) {
+			return true
+		}
+	}
+	return false
+}
+
+func matchURL(url string, list []string) bool {
+	for _, u := range list {
+		if strings.HasPrefix(url, u) {
+			return true
+		}
+	}
+	return false
+}
+
+func cleanHost(h string) string {
+	if idx := strings.LastIndex(h, ":"); idx != -1 {
+		return h[:idx]
+	}
+	return h
+}
+
+func findFreePort(blocked []int) string {
+	for {
+		ln, err := net.Listen("tcp", ":0")
+		if err != nil {
+			return "-1"
+		}
+		port := ln.Addr().(*net.TCPAddr).Port
+		ln.Close()
+
+		if !slices.Contains(blocked, port) {
+			return strconv.Itoa(port)
+		}
+	}
+}
+
+func parseBlockedPorts(s string) []int {
+	var ports []int
+	if s == "" {
+		return ports
+	}
+	for _, p := range strings.Split(s, ",") {
+		if port, err := strconv.Atoi(strings.TrimSpace(p)); err == nil {
+			ports = append(ports, port)
+		}
+	}
+	return ports
+}
+
+func exists(path string) bool {
+	_, err := os.Stat(path)
+	return err == nil
+}