package com.doumee.lib_coremodel.http.interceptor;
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import android.content.Context;
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import com.doumee.lib_coremodel.http.utils.NetworkUtil;
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import java.io.IOException;
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import okhttp3.CacheControl;
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import okhttp3.Interceptor;
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import okhttp3.Request;
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import okhttp3.Response;
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/**
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* Created by goldze on 2017/5/10.
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* 无网络状态下智能读取缓存的拦截器
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*/
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public class CacheInterceptor implements Interceptor {
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private Context context;
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public CacheInterceptor(Context context) {
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this.context = context;
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}
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@Override
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public Response intercept(Chain chain) throws IOException {
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Request request = chain.request();
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if (NetworkUtil.isNetworkAvailable(context)) {
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Response response = chain.proceed(request);
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// read from cache for 60 s
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int maxAge = 60;
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return response.newBuilder()
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.removeHeader("Pragma")
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.removeHeader("Cache-Control")
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.header("Cache-Control", "public, max-age=" + maxAge)
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.build();
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} else {
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//读取缓存信息
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request = request.newBuilder()
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.cacheControl(CacheControl.FORCE_CACHE)
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.build();
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Response response = chain.proceed(request);
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//set cache times is 3 days
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int maxStale = 60 * 60 * 24 * 3;
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return response.newBuilder()
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.removeHeader("Pragma")
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.removeHeader("Cache-Control")
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.header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)
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.build();
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}
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}
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}
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