text: // AFURLCache.h
  //
  // Copyright (c) 2010-2011 Olivier Poitrey <rs@dailymotion.com>
  // Modernized to use GCD by Peter Steinberger <steipete@gmail.com>
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is furnished
  // to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in all
  // copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  
  #import <Foundation/Foundation.h>
  
  @interface AFURLCache : NSURLCache {
      NSString *_diskCachePath;
      NSMutableDictionary *_diskCacheInfo;
      BOOL _diskCacheInfoDirty;
      BOOL _ignoreMemoryOnlyStoragePolicy;
      NSUInteger _diskCacheUsage;
      NSTimeInterval _minCacheInterval;
      dispatch_source_t _maintenanceTimer;
      BOOL _timerPaused;
  }
  
  /*
   * Defines the minimum number of seconds between now and the expiration time of a cacheable response
   * in order for the response to be cached on disk. This prevent from spending time and storage capacity
   * for an entry which will certainly expire before behing read back from disk cache (memory cache is
   * best suited for short term cache). The default value is set to 5 minutes (300 seconds).
   */
  @property (nonatomic, assign) NSTimeInterval minCacheInterval;
  
  /*
   * Allow the responses that have a storage policy of NSURLCacheStorageAllowedInMemoryOnly to be cached
   * on the disk anyway.
   *
   * This is mainly a workaround against cache policies generated by the UIWebViews: starting from iOS 4.2,
   * it always has a cache policy of NSURLCacheStorageAllowedInMemoryOnly.
   * The default value is YES
   */
  @property (nonatomic, assign) BOOL ignoreMemoryOnlyStoragePolicy;
  
  /*
   * Returns a default cache director path to be used at cache initialization. The generated path directory
   * will be located in the application's cache directory and thus won't be synced by iTunes.
   */
  + (NSString *)defaultCachePath;
  
  /*
   * Checks if the provided URL exists in cache.
   */
  - (BOOL)isCached:(NSURL *)url;
  
  @end
  