Got this error with retrofit2 & OkHttp3. Unable to resolve host “”: No address associated with hostname

Question

I am using the retrofit 2 and OkHttp3 to request data from server. I just added a offline cache code but It\'s not working as expected. I got the error \"Unable to resolve host

Answer 1

Your server response has a "Pragma: no-cache" header. You should remove this header in your response interceptor not your request interceptor.

In your current code you've removed it from the request interceptor.

Your provideCacheInterceptor() should look like this:

public static Interceptor provideCacheInterceptor() {
    return new Interceptor() {
        @Override
        public Response intercept(Chain chain) throws IOException {
            Response response = chain.proceed(chain.request());

            // re-write response header to force use of cache
            CacheControl cacheControl = new CacheControl.Builder()
                   .maxAge(2, TimeUnit.MINUTES)
                   .build();

           return response.newBuilder()
                    .header(CACHE_CONTROL, cacheControl.toString())
                    .removeHeader("Pragma")
                    .build();
        }
    };
}