android - 改造 + OkHttp + GZIP-ed JSON

Question

我是 Retrofit 的新手，但它看起来真的很强大。使用普通 JSON 时一切正常，但是当我尝试使用 GZIP 压缩格式时，我就收到一个错误:

I/System.out(14883): ------retrofit.RetrofitError: retrofit.converter.ConversionException: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1

显然，我在日志中看到的乱码无法解析为 JSON。

我认为 okHttp 是正确的 gzip 东西？我错过了什么？

这些 jar 在我的 libs 文件夹中:

retrofit-1.6.1.jar
okhttp-2.0.0.jar
gson-2.2.4.jar

这样我开始通话:

public interface OvlService {
    @GET("/gziptest.gz")
    void getOvls(Callback<OvlWrapper> callback);
}
...
OkHttpClient okHttpClient = new OkHttpClient();
Executor executor = Executors.newCachedThreadPool();
RestAdapter restAdapter = new RestAdapter.Builder()
.setEndpoint("http://my.domain") // The base API endpoint.
.setLogLevel(RestAdapter.LogLevel.FULL)
.setExecutors(executor, executor)
.setClient(new OkClient(okHttpClient))
.build();

OvlService ovlService = restAdapter.create(OvlService.class);

ovlService.getOvls(new Callback<OvlWrapper>() {

    @Override
    public void success(OvlWrapper arg0, Response arg1) {
        System.out.println("result: " + arg0.toString());
    }
});

result:-line 从未显示，但我看到了很多这样的东西 T�� ����=��Mk��A��G��4.�� @��A�� 在 RetrofitLog 中。gzip没有解压我做错了什么？谢谢!

编辑:

我在我的测试服务器 (server.com/ovl.gz) 上用 gzip 文件试过了，我也试过用原始的 api 服务器 (server2.com/api. php?id=ovlgzip)。结果相同，但 header 不同:

测试服务器:

HTTP/1.1 200 OK
Accept-Ranges: bytes
Connection: close
Content-Length: 477
Content-Type: application/x-gzip
ETag: "2cc40cb-1dd-..."
Last-Modified: Tue, 08 Jul 2014 17:00:08 GMT
OkHttp-Received-Millis: 1404950522590
OkHttp-Response-Source: NETWORK 200
OkHttp-Selected-Transport: http/1.1
OkHttp-Sent-Millis: 1404950522533
Server: Apache
�������������}�Qk�0���...

原始服务器:

HTTP/1.1 200 OK
Connection: Keep-Alive
Content-Type: application/json
Keep-Alive: timeout=4, max=1000
OkHttp-Received-Millis: 1404950697627
OkHttp-Response-Source: NETWORK 200
OkHttp-Selected-Transport: http/1.1
OkHttp-Sent-Millis: 1404950697002
Server: Apache
Transfer-Encoding: chunked
X-Powered-By: PHP/5.3.3-7+squeeze19
�������������}�Qk�0���...

Answer 1

感谢Jake Whartons comment结果是 Content-Encoding: gzip header 丢失了。因为我告诉服务器添加这些 header ，所以一切正常:

<?php
$data = ...;
$gzdata = gzencode($data, 9, FORCE_GZIP);
header('Content-Encoding: gzip');
header('Content-Length: '.strlen($gzdata));
... ?>