internal/beater/middleware/kill_switch_middleware.go

// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 middleware

import (
	"github.com/pkg/errors"

	"github.com/elastic/apm-server/internal/beater/request"
)

// KillSwitchMiddleware returns a Middleware checking whether the path for the request is enabled
func KillSwitchMiddleware(enabled bool, errorMessage string) Middleware {
	return func(h request.Handler) (request.Handler, error) {
		return func(c *request.Context) {
			if enabled {
				h(c)
			} else {
				c.Result.SetWithError(request.IDResponseErrorsForbidden, errors.New(errorMessage))
				c.WriteResult()
			}
		}, nil
	}
}