Wie man die Antwort im Quadratup.okhttp3

Question

zwischenspeichere Ich versuche, die http Antwort durch OKhttp zu cachen, aber nicht finden, ein gutes Beispiel oder eine Dokumentation.

Vielen Dank für jede Hilfe

Answer 1

all Ihre Antwort für 2 Minuten zwischengespeichert werden

OkHttpClient provideOkHttpClient() { 
    Cache cache = new Cache(new File(context.getCacheDir(), "http-cache"), 10 * 1024 * 1024); 
    return new OkHttpClient.Builder() 
      .addNetworkInterceptor(provideCacheInterceptor()) 
      .cache(cache) 
      .build(); 
} 

Interceptor provideCacheInterceptor() { 
    return new Interceptor() { 
     @Override 
     public Response intercept (Chain chain) throws IOException { 
      Response response = chain.proceed(chain.request()); 
      CacheControl cacheControl = new CacheControl.Builder() 
        .maxAge(2, TimeUnit.MINUTES) 
        .build(); 

      return response.newBuilder() 
        .header("Cache-Control", cacheControl.toString()) 
        .build(); 
     } 
    }; 
} 

Answer 2

Es gibt eine Probe hier CacheResponse.java

Cache cache = new Cache(cacheDirectory, cacheSize); 

client = new OkHttpClient.Builder() 
    .cache(cache) 
    .build(); 

Die javadoc for Cache Beispiele für zwingen frisch oder im Cache gespeichert hat, ist Antworten.

Answer 3

public final class FeedInterceptor{ 
private final static String TAG = FeedInterceptor.class.getSimpleName(); 

/** 
* Validate cache, return stream. Return cache if no network. 
* @param context 
* @return 
*/ 
public static Interceptor getOnlineInterceptor(final Context context){ 
    Interceptor interceptor = new Interceptor() { 
     @Override 
     public Response intercept(Chain chain) throws IOException { 
      Response response = chain.proceed(chain.request()); 

      String headers = response.header("Cache-Control"); 
      if(NetworkUtils.isConnected(context) && 
        (headers == null || headers.contains("no-store") || headers.contains("must-revalidate") || headers.contains("no-cache") || headers.contains("max-age=0"))){ 

       LOGD(TAG, "Returning fresh response"); 
       return response.newBuilder() 
         .header("Cache-Control", "public, max-age=600") 
         .build(); 
      } else{ 
       LOGD(TAG, "Returning old response"); 
       return response; 
      } 
     } 
    }; 

    return interceptor; 
} 

/** 
* Get me cache. 
* @param context 
* @return 
*/ 
public static Interceptor getOfflineInterceptor(final Context context){ 
    Interceptor interceptor = new Interceptor() { 
     @Override 
     public Response intercept(Chain chain) throws IOException { 
      Request request = chain.request(); 
      if(!NetworkUtils.isConnected(context)){ 
       request = request.newBuilder() 
         .header("Cache-Control", "public, only-if-cached") 
         .build(); 
      } 

      return chain.proceed(request); 
     } 
    }; 

    return interceptor; 
} 

}

Und der Kunde:

private OkHttpClient createCacheClient(Context context){ 

    File httpCacheDirecotory = new File(context.getCacheDir(), FILE); 
    Cache cache = new Cache(httpCacheDirecotory, CACHE_SIZE); 

    return new OkHttpClient.Builder() 
      .addNetworkInterceptor(FeedInterceptor.getOnlineInterceptor(context)) 
      .addInterceptor(FeedInterceptor.getOfflineInterceptor(context)) 
      .cache(cache) 
      .build(); 
} 

Reference