/*
    * ====================================================================
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.hc.client5.http.examples;
  
  import java.io.IOException;
  
  import org.apache.hc.client5.http.ClientProtocolException;
  import org.apache.hc.client5.http.classic.methods.HttpGet;
  import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
  import org.apache.hc.client5.http.impl.classic.HttpClients;
  import org.apache.hc.core5.http.ClassicHttpResponse;
  import org.apache.hc.core5.http.HttpEntity;
  import org.apache.hc.core5.http.HttpStatus;
  import org.apache.hc.core5.http.ParseException;
  import org.apache.hc.core5.http.io.HttpClientResponseHandler;
  import org.apache.hc.core5.http.io.entity.EntityUtils;
  
  /**
   * This example demonstrates the use of the {@link HttpClientResponseHandler} to simplify
   * the process of processing the HTTP response and releasing associated resources.
   */
  public class ClientWithResponseHandler {
  
      public static void main(final String[] args) throws Exception {
          try (final CloseableHttpClient httpclient = HttpClients.createDefault()) {
              final HttpGet httpget = new HttpGet("http://httpbin.org/get");
  
              System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri());
  
              // Create a custom response handler
              final HttpClientResponseHandler<String> responseHandler = new HttpClientResponseHandler<String>() {
  
                  @Override
                  public String handleResponse(
                          final ClassicHttpResponse response) throws IOException {
                      final int status = response.getCode();
                      if (status >= HttpStatus.SC_SUCCESS && status < HttpStatus.SC_REDIRECTION) {
                          final HttpEntity entity = response.getEntity();
                          try {
                              return entity != null ? EntityUtils.toString(entity) : null;
                          } catch (final ParseException ex) {
                              throw new ClientProtocolException(ex);
                          }
                      } else {
                          throw new ClientProtocolException("Unexpected response status: " + status);
                      }
                  }
  
              };
              final String responseBody = httpclient.execute(httpget, responseHandler);
              System.out.println("----------------------------------------");
              System.out.println(responseBody);
          }
      }
  
  }