/*----------------------------------------------------------------------------------

// Copyright 2019 Huawei Technologies Co.,Ltd.

// 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.

//----------------------------------------------------------------------------------*/

using System;

using System.Collections;

using System.Collections.Generic;

using System.Net;



namespace OBS.Internal

{

    internal interface HttpResponseHandler

    {

        void Handle(HttpResponse response);

    }



    internal class MergeResponseHeaderHandler : HttpResponseHandler

    {



        private IHeaders iheaders;



        public MergeResponseHeaderHandler(IHeaders iheaders)

        {

            this.iheaders = iheaders;

        }



        public void Handle(HttpResponse response)

        {

            if(response != null && response.HttpWebResponse != null)

            {

                WebHeaderCollection headers = response.HttpWebResponse.Headers;

                IDictionary<string, string> result = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);

                int cnt = headers.Count;

                for (int i = 0; i < cnt; i++)

                {

                    string key = headers.Keys[i];

                    string value = headers.Get(key);

                    if(string.IsNullOrEmpty(key) || value == null)

                    {

                        continue;

                    }



                    if (key.StartsWith(this.iheaders.HeaderMetaPrefix(), StringComparison.OrdinalIgnoreCase))

                    {

                        key = CommonUtil.UrlDecode(key);

                    }



                    value = CommonUtil.UrlDecode(value);



                    if (result.ContainsKey(key))

                    {

                        string _value = result[key] + "," + value;

                        result[key] = _value;

                    }else

                    {

                        result.Add(key, value);

                    }

                }

                response.Headers = result;

            }

        }

    }

}