如何压缩JSONObject在Android中通过Http发送它？

Question

我正在使用此示例中的代码JSONObject向我的Web服务器发送一个.在此处复制代码Android client

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;

int TIMEOUT_MILLISEC = 10000;  // = 10 seconds
HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams, TIMEOUT_MILLISEC);
HttpConnectionParams.setSoTimeout(httpParams, TIMEOUT_MILLISEC);
HttpClient client = new DefaultHttpClient(httpParams);

HttpPost request = new HttpPost(serverUrl);
request.setEntity(new ByteArrayEntity(
    postMessage.toString().getBytes("UTF8")));
HttpResponse response = client.execute(request);

我的问题

如何JSONObject在将其发送到服务器之前进行最佳压缩以及如何在服务器上解压缩(我正在使用Java Servlets)？

Answer 1

根据这个http://android-developers.blogspot.com/2011/09/androids-http-clients.html如果您使用Gingerbread或更高版本HttpURLConnection自动添加gzip压缩:

在Gingerbread中,我们添加了透明响应压缩.HttpURLConnection将自动将此标头添加到传出请求,并处理相应的响应:

Accept-Encoding:gzip

然后,您的网络服务器需要处理gzip压缩.

编辑:
使用Java Servlets提供Gzip压缩内容

编辑2:
使用DefaultHttpClient进行Gzip压缩使用HttpClient启用GZip压缩

private static final String HEADER_ACCEPT_ENCODING = "Accept-Encoding";
private static final String ENCODING_GZIP = "gzip";

final DefaultHttpClient client = new DefaultHttpClient(manager, parameters);

client.addRequestInterceptor(new HttpRequestInterceptor() {
  public void process(HttpRequest request, HttpContext context) {
    // Add header to accept gzip content
    if (!request.containsHeader(HEADER_ACCEPT_ENCODING)) {
      request.addHeader(HEADER_ACCEPT_ENCODING, ENCODING_GZIP);
    }
  }
});

client.addResponseInterceptor(new HttpResponseInterceptor() {
  public void process(HttpResponse response, HttpContext context) {
    // Inflate any responses compressed with gzip
    final HttpEntity entity = response.getEntity();
    final Header encoding = entity.getContentEncoding();
    if (encoding != null) {
      for (HeaderElement element : encoding.getElements()) {
        if (element.getName().equalsIgnoreCase(ENCODING_GZIP)) {
          response.setEntity(new InflatingEntity(response.getEntity()));
          break;
        }
      }
    }
  }
});

编辑3:
这是关于使用Java中的HTTPClient对邮件内容GZip POST请求进行gzipping的另一个Stackoverflow问题.您需要在发布数据之前手动gzip数据,因为正常的http/gzip操作是将gzip压缩内容发送到客户端的服务器.