content: /*
   * Copyright (C) 2011 The Android Open Source Project
   *
   * 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.cjj.volley.toolbox;
  
  import com.cjj.volley.NetworkResponse;
  import com.cjj.volley.ParseError;
  import com.cjj.volley.Response;
  import com.cjj.volley.Response.ErrorListener;
  import com.cjj.volley.Response.Listener;
  
  import org.json.JSONException;
  import org.json.JSONObject;
  
  import java.io.UnsupportedEncodingException;
  
  /**
   * A request for retrieving a {@link JSONObject} response body at a given URL, allowing for an
   * optional {@link JSONObject} to be passed in as part of the request body.
   */
  public class JsonObjectRequest extends JsonRequest<JSONObject> {
  
      /**
       * Creates a new request.
       * @param method the HTTP method to use
       * @param url URL to fetch the JSON from
       * @param jsonRequest A {@link JSONObject} to post with the request. Null is allowed and
       *   indicates no parameters will be posted along with request.
       * @param listener Listener to receive the JSON response
       * @param errorListener Error listener, or null to ignore errors.
       */
      public JsonObjectRequest(int method, String url, JSONObject jsonRequest,
              Listener<JSONObject> listener, ErrorListener errorListener) {
          super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), listener,
                      errorListener);
      }
  
      /**
       * Constructor which defaults to <code>GET</code> if <code>jsonRequest</code> is
       * <code>null</code>, <code>POST</code> otherwise.
       *
       * @see #JsonObjectRequest(int, String, JSONObject, Listener, ErrorListener)
       */
      public JsonObjectRequest(String url, JSONObject jsonRequest, Listener<JSONObject> listener,
              ErrorListener errorListener) {
          this(jsonRequest == null ? Method.GET : Method.POST, url, jsonRequest,
                  listener, errorListener);
      }
  
      @Override
      protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
          try {
              String jsonString =
                  new String(response.data, HttpHeaderParser.parseCharset(response.headers));
              return Response.success(new JSONObject(jsonString),
                      HttpHeaderParser.parseCacheHeaders(response));
          } catch (UnsupportedEncodingException e) {
              return Response.error(new ParseError(e));
          } catch (JSONException je) {
              return Response.error(new ParseError(je));
          }
      }
  }
  