Java NanoHttpd-返回gzip响应

如何在中启用GZIP压缩

Java代码（启动web服务器并对任何请求返回相同的默认响应）：

这项请求：

GET / HTTP/1.1
Host: localhost:8080
Pragma: no-cache
Cache-Control: no-cache
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9,ru;q=0.8

生成以下响应：

HTTP/1.1 200 OK 
Content-Type: application/json
Date: Tue, 28 Aug 2018 11:39:12 GMT
Connection: keep-alive
Transfer-Encoding: chunked

{"response":1}

---

有没有办法为NanoHttpd响应启用GZIP？

在服务器上添加类似的内容：

protected boolean useGzipWhenAccepted(Response r) {
    return true;
}

---

也不需要使用

res.setgzipencode（true）自动调用。
如果标头不包含{'Accept-Encoding'：'gzip'}或甚至不包含'Accept-Encoding'标头，那么NanoHTTPD将默认将useGzipEncode设置为false。要克服这一问题，您可以从外部gzip数据，并将字节[]传递给响应

public class Server extends NanoHTTPD {

  byte[] bArr;

  public Server(int port) {
    super(port);
  }

  @Override
  public Response serve(IHTTPSession session) {
    return newFixedLengthResponse(Response.Status.OK,"application/octect-stream",new ByteArrayInputStream(this.bArr),bArr.length);
  }

  public void compressWithGzip(byte[] bArr) {
    ByteArrayOutputStream bout = new ByteArrayOutputStream();
    try {
      GZIPOutputStream gzip = new GZIPOutputStream(bout);
      gzip.write(bArr,0,bArr.length);
      gzip.close();
      setByteArray(bout.toByteArray());
      bout.close();
    } catch (IOException e) {
      //TODO
    }
  }

  public void setByteArray(byte[] byteArray) {
    this.bArr = byteArray;
  }
}

public class Server extends NanoHTTPD {

  byte[] bArr;

  public Server(int port) {
    super(port);
  }

  @Override
  public Response serve(IHTTPSession session) {
    return newFixedLengthResponse(Response.Status.OK,"application/octect-stream",new ByteArrayInputStream(this.bArr),bArr.length);
  }

  public void compressWithGzip(byte[] bArr) {
    ByteArrayOutputStream bout = new ByteArrayOutputStream();
    try {
      GZIPOutputStream gzip = new GZIPOutputStream(bout);
      gzip.write(bArr,0,bArr.length);
      gzip.close();
      setByteArray(bout.toByteArray());
      bout.close();
    } catch (IOException e) {
      //TODO
    }
  }

  public void setByteArray(byte[] byteArray) {
    this.bArr = byteArray;
  }
}