content: /*
   * Copyright 1999-2018 Alibaba Group Holding 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.
   */
  
  package com.alibaba.nacos.common.http.client.request;
  
  import com.alibaba.nacos.common.constant.HttpHeaderConsts;
  import com.alibaba.nacos.common.http.BaseHttpMethod;
  import com.alibaba.nacos.common.http.HttpClientConfig;
  import com.alibaba.nacos.common.http.HttpUtils;
  import com.alibaba.nacos.common.http.client.response.DefaultClientHttpResponse;
  import com.alibaba.nacos.common.http.client.response.HttpClientResponse;
  import com.alibaba.nacos.common.http.param.Header;
  import com.alibaba.nacos.common.http.param.MediaType;
  import com.alibaba.nacos.common.model.RequestHttpEntity;
  import com.alibaba.nacos.common.utils.IoUtils;
  import org.apache.hc.client5.http.async.methods.SimpleHttpResponse;
  import org.apache.hc.client5.http.classic.methods.HttpUriRequestBase;
  import org.apache.hc.client5.http.config.RequestConfig;
  import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
  import org.apache.hc.core5.http.ContentType;
  import org.apache.hc.core5.util.Timeout;
  
  import java.io.IOException;
  import java.net.URI;
  import java.util.Map;
  
  /**
   * {@link HttpClientRequest} implementation that uses apache http client to execute streaming requests.
   *
   * @author mai.jh
   */
  @SuppressWarnings({"unchecked", "resource"})
  public class DefaultHttpClientRequest implements HttpClientRequest {
      
      private final CloseableHttpClient client;
      
      private final RequestConfig defaultConfig;
      
      public DefaultHttpClientRequest(CloseableHttpClient client, RequestConfig defaultConfig) {
          this.client = client;
          this.defaultConfig = defaultConfig;
      }
      
      @Override
      public HttpClientResponse execute(URI uri, String httpMethod, RequestHttpEntity requestHttpEntity)
              throws Exception {
          HttpUriRequestBase request = build(uri, httpMethod, requestHttpEntity, defaultConfig);
          // copy http response to simple type
          SimpleHttpResponse response = client.execute(request, httpResponse -> {
              SimpleHttpResponse simpleHttpResponse = SimpleHttpResponse.copy(httpResponse);
              ContentType contentType = ContentType.parse(httpResponse.getEntity().getContentType());
              String body = IoUtils.toString(httpResponse.getEntity().getContent(), null);
              simpleHttpResponse.setBody(body, contentType);
              return simpleHttpResponse;
          });
          return new DefaultClientHttpResponse(response);
      }
      
      static HttpUriRequestBase build(URI uri, String method, RequestHttpEntity requestHttpEntity,
              RequestConfig defaultConfig) throws Exception {
          final Header headers = requestHttpEntity.getHeaders();
          final BaseHttpMethod httpMethod = BaseHttpMethod.sourceOf(method);
          final HttpUriRequestBase httpRequestBase = httpMethod.init(uri.toString());
          
          HttpUtils.initRequestHeader(httpRequestBase, headers);
          if (MediaType.APPLICATION_FORM_URLENCODED.equals(headers.getValue(HttpHeaderConsts.CONTENT_TYPE))
                  && requestHttpEntity.getBody() instanceof Map) {
              HttpUtils.initRequestFromEntity(httpRequestBase, (Map<String, String>) requestHttpEntity.getBody(),
                      headers.getCharset());
          } else {
              HttpUtils.initRequestEntity(httpRequestBase, requestHttpEntity.getBody(), headers);
          }
          
          mergeDefaultConfig(httpRequestBase, requestHttpEntity.getHttpClientConfig(), defaultConfig);
          return httpRequestBase;
      }
      
      /**
       * Merge the HTTP config created by default with the HTTP config specified in the request.
       *
       * @param requestBase      requestBase
       * @param httpClientConfig http config
       */
      private static void mergeDefaultConfig(HttpUriRequestBase requestBase, HttpClientConfig httpClientConfig,
              RequestConfig defaultConfig) {
          if (httpClientConfig == null) {
              return;
          }
          requestBase.setConfig(RequestConfig.copy(defaultConfig)
                  .setConnectionRequestTimeout(Timeout.ofMilliseconds(httpClientConfig.getConTimeOutMillis()))
                  .setResponseTimeout(Timeout.ofMilliseconds(httpClientConfig.getReadTimeOutMillis())).build());
      }
      
      @Override
      public void close() throws IOException {
          client.close();
      }
  }
  