我正在尝试使用Retrofit & OKHttp来缓存HTTP响应。我关注了this gist,最后得到了下面的代码:
File httpCacheDirectory = new File(context.getCacheDir(), "responses");
HttpResponseCache httpResponseCache = null;
try {
httpResponseCache = new HttpResponseCache(httpCacheDirectory, 10 * 1024 * 1024);
} catch (IOException e) {
Log.e("Retrofit", "Could not create http cache", e);
}
OkHttpClient okHttpClient = new OkHttpClient();
okHttpClient.setResponseCache(httpResponseCache);
api = new RestAdapter.Builder()
.setEndpoint(API_URL)
.setLogLevel(RestAdapter.LogLevel.FULL)
.setClient(new OkClient(okHttpClient))
.build()
.create(MyApi.class);
这是带有缓存控制标头的MyApi
public interface MyApi {
@Headers("Cache-Control: public, max-age=640000, s-maxage=640000 , max-stale=2419200")
@GET("/api/v1/person/1/")
void requestPerson(
Callback<Person> callback
);
首先,我在线请求并检查缓存文件。正确的JSON响应和标头都在那里。但是当我尝试离线请求时,我总是得到RetrofitError UnknownHostException
。要使Retrofit从缓存中读取响应,我还需要做什么吗?
编辑:由于OKHttp 2.0.x HttpResponseCache
为Cache
,setResponseCache
为setCache
https://stackoverflow.com/questions/23429046
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