support yaml/json/toml configuration format, make ini deprecated (#3599)

pkg/config/v1/validation/common.go

@@ -0,0 +1,41 @@
+// Copyright 2023 The frp Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package validation
+
+import (
+	"fmt"
+
+	v1 "github.com/fatedier/frp/pkg/config/v1"
+)
+
+func validateWebServerConfig(c *v1.WebServerConfig) error {
+	if c.TLS != nil {
+		if c.TLS.CertFile == "" {
+			return fmt.Errorf("tls.certFile must be specified when tls is enabled")
+		}
+		if c.TLS.KeyFile == "" {
+			return fmt.Errorf("tls.keyFile must be specified when tls is enabled")
+		}
+	}
+	return nil
+}
+
+// ValidatePort checks that the network port is in range
+func ValidatePort(port int) error {
+	if 0 <= port && port <= 65535 {
+		return nil
+	}
+	return fmt.Errorf("port number %d must be in the range 0..65535", port)
+}