sdk/sources/android-23/com/android/volley/toolbox/StringRequest.java

   1 /*
   2  * Copyright (C) 2011 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package com.android.volley.toolbox;
  18
  19 import com.android.volley.NetworkResponse;
  20 import com.android.volley.Request;
  21 import com.android.volley.Response;
  22 import com.android.volley.Response.ErrorListener;
  23 import com.android.volley.Response.Listener;
  24
  25 import java.io.UnsupportedEncodingException;
  26
  27 /**
  28  * A canned request for retrieving the response body at a given URL as a String.
  29  */
  30 public class StringRequest extends Request<String> {
  31     private final Listener<String> mListener;
  32
  33     /**
  34      * Creates a new request with the given method.
  35      *
  36      * @param method the request {@link Method} to use
  37      * @param url URL to fetch the string at
  38      * @param listener Listener to receive the String response
  39      * @param errorListener Error listener, or null to ignore errors
  40      */
  41     public StringRequest(int method, String url, Listener<String> listener,
  42             ErrorListener errorListener) {
  43         super(method, url, errorListener);
  44         mListener = listener;
  45     }
  46
  47     /**
  48      * Creates a new GET request.
  49      *
  50      * @param url URL to fetch the string at
  51      * @param listener Listener to receive the String response
  52      * @param errorListener Error listener, or null to ignore errors
  53      */
  54     public StringRequest(String url, Listener<String> listener, ErrorListener errorListener) {
  55         this(Method.GET, url, listener, errorListener);
  56     }
  57
  58     @Override
  59     protected void deliverResponse(String response) {
  60         mListener.onResponse(response);
  61     }
  62
  63     @Override
  64     protected Response<String> parseNetworkResponse(NetworkResponse response) {
  65         String parsed;
  66         try {
  67             parsed = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
  68         } catch (UnsupportedEncodingException e) {
  69             parsed = new String(response.data);
  70         }
  71         return Response.success(parsed, HttpHeaderParser.parseCacheHeaders(response));
  72     }
  73 }