add persistent proxy/visitor store with CRUD API and web UI (#5188)

pkg/naming/names.go

@@ -0,0 +1,33 @@
+package naming
+
+import "strings"
+
+// AddUserPrefix builds the wire-level proxy name for frps by prefixing user.
+func AddUserPrefix(user, name string) string {
+	if user == "" {
+		return name
+	}
+	return user + "." + name
+}
+
+// StripUserPrefix converts a wire-level proxy name to an internal raw name.
+// It strips only one exact "{user}." prefix.
+func StripUserPrefix(user, name string) string {
+	if user == "" {
+		return name
+	}
+	prefix := user + "."
+	if strings.HasPrefix(name, prefix) {
+		return strings.TrimPrefix(name, prefix)
+	}
+	return name
+}
+
+// BuildTargetServerProxyName resolves visitor target proxy name for wire-level
+// protocol messages. serverUser overrides local user when set.
+func BuildTargetServerProxyName(localUser, serverUser, serverName string) string {
+	if serverUser != "" {
+		return AddUserPrefix(serverUser, serverName)
+	}
+	return AddUserPrefix(localUser, serverName)
+}