OKHttp缓存到期 [英] OKHttp cache with expiration

问题描述

我是OkHttpClient的新手，我不知道如何仅将缓存存储1周.
因此，当代理更新数据时，它也会在1周后在移动设备中更新.

I am new to OkHttpClient and i don't know how to store cache for only 1 week.
So when agent update data, it will update in mobile too after 1 week.

推荐答案

您可以使用CacheControl

设置缓存响应的最长期限.如果缓存响应的期限超过MaxAge，它将不被使用，并且将发出网络请求

Sets the maximum age of a cached response. If the cache response's age exceeds MaxAge it will not be used and a network request will be made

接受已超过其新鲜度生存期达MaxStale的缓存响应.如果未指定，将不使用过时的缓存响应

Accept cached responses that have exceeded their freshness lifetime by up to MaxStale. If unspecified, stale cache responses will not be used

public Interceptor provideCacheInterceptor(final int maxDays) {      
    return new Interceptor() {       
        @Override
        public Response intercept(Chain chain) throws IOException {
            Response response = chain.proceed(chain.request());
            CacheControl cacheControl = new CacheControl.Builder()
                .maxAge(maxDays, TimeUnit.DAYS)
                .build();

            return response.newBuilder()
                .header(Constants.CACHE_CONTROL, cacheControl.toString())
                .build();
        }
    };
}

然后您可以将其添加到您的HttpClient

And later you can add this to your HttpClient

int MaxCacheDays = 7; 
httpClient.addNetworkInterceptor(provideCacheInterceptor(MaxCacheDays));

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