java - Android 压缩包

Question

我的代码中有以下两种方法。现在，我可以根据以下代码从 URL 读取 JSON。但是，我应该如何修改代码以便获得 gzip 文件，然后将其解码为 JSON？

private static String readAll(Reader rd) throws IOException {
    StringBuilder sb = new StringBuilder();
    int cp;
    while ((cp = rd.read()) != -1) {
      sb.append((char) cp);
    }
    return sb.toString();
}

public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {

    InputStream is = new URL(url).openStream();
    try {
      BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
      String jsonText = readAll(rd);
      Log.e("size of text", jsonText.length()+"");

      JSONObject json;
      if (jsonText.contains("</div>")) {
          json = new JSONObject(jsonText.split("</div>")[1]);
      } else {
          json = new JSONObject(jsonText);
      }
      return json;
    } finally {
      is.close();
    }
}

Answer 1

public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {

    HttpUriRequest request = new HttpGet(url);
    request.addHeader("Accept-Encoding", "gzip");
    HttpClient httpClient = new DefaultHttpClient();
    HttpResponse response = httpClient.execute(request);

    InputStream instream = response.getEntity().getContent();
    org.apache.http.Header contentEncoding = response.getFirstHeader("Content-Encoding");

    JSONObject json = null;
    if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) {
        BufferedReader rd = new BufferedReader(new InputStreamReader(new GZIPInputStream(instream)));
        String jsonText = readAll(rd);
          if (jsonText.contains("</div>")) {
              json = new JSONObject(jsonText.split("</div>")[1]);
          } else {
              json = new JSONObject(jsonText);
          }
    }
    return json;
}