Is there any way to disagree server header?

[simpleton]

I want to do some cache stuff in android client, but the server always return Cache-Control: max-age=0, private, must-revalidate, I wanna ignore it's Cache-Control.

[swankjesse]

You're in luck. Be careful, this is dangerous.

https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/com/squareup/okhttp/recipes/RewriteResponseCacheControl.java

[simpleton]

@swankjesse thanks. :D

[simpleton]

Hi swankjesse, is there any way to use this way with retrofit? I build this kind of client and set it to retrofit, but REWRITE_CACHE_CONTROL_INTERCEPTOR didn't get the callback.

    public static Client buildOkHttpClient(boolean cacheEnable) {
        Cache cache = null;
        OkHttpClient client = new OkHttpClient();
        if (cacheEnable) {
            File cacheDirectory = new File(MainApplication.getInstance().getCacheDir().getAbsolutePath(), "HttpCache");
            try {
                cache = new Cache(cacheDirectory, CACHE_SIZE);
            } catch (IOException e) {
                e.printStackTrace();
            }
            client.setCache(cache);
            client.interceptors().add(REWRITE_CACHE_CONTROL_INTERCEPTOR);
        }
        return new OkClient(client);
    }

    /** Dangerous interceptor that rewrites the server's cache-control header. */
    private static final Interceptor REWRITE_CACHE_CONTROL_INTERCEPTOR = new Interceptor() {
        @Override public Response intercept(Chain chain) throws IOException {
            Response originalResponse = chain.proceed(chain.request());
            return originalResponse.newBuilder()
                    .header("Cache-Control", String.format("max-age=%d, max-stale=%d", MAX_AGE, MAX_STALE))
                    .build();
        }
    };

[swankjesse]

Are you comfortable using a snapshot build of Retrofit? The Retrofit code in git supports OkHttp headers, but that hasn't been released yet. (Probably will be released within 4–8 weeks.)

[simpleton]

@swankjesse Thank your replay. I change to compile 'com.squareup.retrofit:retrofit:2.0.0-SNAPSHOT' But it still can't cache the response. I take a issue in retrofit project. square/retrofit#693