デフォルトのユーザーエージェントの設定 (#4)

factory.go

@@ -52,10 +52,14 @@ func NewFactory(options ...*Options) *Factory {
 func (f *Factory) NewHttpRequestDoer() HttpRequestDoer {
 	f.init()
 
+	ua := f.options.UserAgent
+	if ua == "" {
+		ua = DefaultUserAgent
+	}
 	return &sacloudhttp.Client{
 		AccessToken:       f.options.AccessToken,
 		AccessTokenSecret: f.options.AccessTokenSecret,
-		UserAgent:         f.options.UserAgent,
+		UserAgent:         ua,
 		AcceptLanguage:    f.options.AcceptLanguage,
 		Gzip:              f.options.Gzip,
 		CheckRetryFunc:    f.checkRetryFn(),

ua.go

@@ -0,0 +1,31 @@
+// Copyright 2022 The sacloud/api-client-go 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 client
+
+import (
+	"fmt"
+	"runtime"
+
+	sacloudhttp "github.com/sacloud/go-http"
+)
+
+// DefaultUserAgent デフォルトのユーザーエージェント
+var DefaultUserAgent = fmt.Sprintf(
+	"api-client-go/v%s (%s/%s; +https://github.com/sacloud/api-client-go) %s",
+	Version,
+	runtime.GOOS,
+	runtime.GOARCH,
+	sacloudhttp.DefaultUserAgent,
+)