Retrofit: cache-control never included in response

Question

no matter what I do I can never see the header cache-control in the response.

Settings

• retrofit 1.6.0
• okHttp 1.6.0
• okHttp-urlConnection 1.6.0
• gson 2.2.4
• Android 4.0+

1. Configuration

1.1 RestAdapter with my OkHttpClient

OkHttpClient okHttpClient = new OkHttpClient();
Cache cache = new Cache(getCacheDir(), 1024);
okHttpClient.setCache(cache);

RestAdapter restAdapter = new RestAdapter.Builder()
            .setEndpoint(URL)
            .setClient(new OkClient(okHttpClient))
            .setLogLevel(LogLevel.HEADERS)
            .build();

1.2 RestAdapter with the default OkHttpClient Here, when debugging I could see that the client has cache=null;

RestAdapter restAdapter = new RestAdapter.Builder()
            .setEndpoint(URL)
            .setLogLevel(LogLevel.HEADERS)
            .build();

2 Log

For the both configurations the logs are the same.

2.1 REQUEST

06-28 13:24:05.601: D/Retrofit(1581): ---> HTTP GET myUri

06-28 13:24:05.601: D/Retrofit(1581): Cache-Control: public, max-age=640000

06-28 13:24:05.601: D/Retrofit(1581): ---> END HTTP (no body)

2.2 RESPONSE

06-28 13:24:05.701: D/Retrofit(1581): <--- HTTP 200 myUri (102ms)

06-28 13:24:05.701: D/Retrofit(1581): : HTTP/1.1 200 OK

06-28 13:24:05.701: D/Retrofit(1581): Connection: keep-alive

06-28 13:24:05.701: D/Retrofit(1581): Content-Type: text/html

06-28 13:24:05.701: D/Retrofit(1581): Date: Sat, 28 Jun 2014 13:24:01 GMT

06-28 13:24:05.701: D/Retrofit(1581): OkHttp-Received-Millis: 1403961845708

06-28 13:24:05.701: D/Retrofit(1581): OkHttp-Response-Source: NETWORK 200

06-28 13:24:05.701: D/Retrofit(1581): OkHttp-Sent-Millis: 1403961845680

06-28 13:24:05.701: D/Retrofit(1581): Server: nginx/1.6.0

06-28 13:24:05.701: D/Retrofit(1581): Transfer-Encoding: chunked

06-28 13:24:05.701: D/Retrofit(1581): Vary: Accept-Encoding

06-28 13:24:05.701: D/Retrofit(1581): X-Powered-By: PHP/5.5.12-1~dotdeb.1

06-28 13:24:05.701: D/Retrofit(1581): <--- END HTTP (-1-byte body)

EDIT 03/07/2014

I noticed that in this question Retrofit+OkHttp is ok when sending GET requests but gives SocketTimetout when sending POST the asker gets "cache-control" in response.

04-11 18:00:41.291: D/Retrofit(16390): ---> HTTP GET url

04-11 18:00:41.291: D/Retrofit(16390): ---> END HTTP (0-byte body)

04-11 18:00:42.008: D/Retrofit(16390): <--- HTTP 200 url (716ms)

04-11 18:00:42.015: D/Retrofit(16390): : HTTP/1.1 200 OK

04-11 18:00:42.015: D/Retrofit(16390): Cache-Control: max-age=0, private, must-revalidate

Still cannot solve this issue neither in emulators nor in a real device though...

Answer 1

我是愚蠢的，我们没有在后端正确设置缓存！