text: /*
   * Tencent is pleased to support the open source community by making TKEStack
   * available.
   *
   * Copyright (C) 2012-2019 Tencent. All Rights Reserved.
   *
   * 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
   *
   * https://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations under the License.
   */
  
  package util
  
  import (
  	"context"
  	"io"
  	"net/http"
  	"net/url"
  
  	"k8s.io/apimachinery/pkg/runtime"
  	"k8s.io/apimachinery/pkg/runtime/schema"
  	genericrest "k8s.io/apiserver/pkg/registry/generic/rest"
  	"k8s.io/apiserver/pkg/registry/rest"
  )
  
  // LocationStreamer is a resource that streams the contents of a particular
  // location URL.
  type LocationStreamer struct {
  	IP              string
  	Request         ReaderCloserGetter
  	Location        *url.URL
  	Transport       http.RoundTripper
  	ContentType     string
  	Flush           bool
  	ResponseChecker genericrest.HttpResponseChecker
  	RedirectChecker func(req *http.Request, via []*http.Request) error
  }
  
  // a LocationStreamer must implement a rest.ResourceStreamer
  var _ rest.ResourceStreamer = &LocationStreamer{}
  
  func (s *LocationStreamer) GetObjectKind() schema.ObjectKind {
  	return schema.EmptyObjectKind
  }
  func (s *LocationStreamer) DeepCopyObject() runtime.Object {
  	panic("rest.LocationStreamer does not implement DeepCopyObject")
  }
  
  // InputStream returns a stream with the contents of the URL location. If no location is provided,
  // a null stream is returned.
  func (s *LocationStreamer) InputStream(ctx context.Context, apiVersion, acceptHeader string) (stream io.ReadCloser, flush bool, contentType string, err error) {
  	stream, err = s.Request.GetReaderCloser()
  	flush = false
  	contentType = s.ContentType
  	return
  }
  