Deprecated. Download cache to store http responses.Please note that the download cache does not work with ODPRequest via SUP. [[DownloadCache instance] setDefaultCachePolicy:OnlyLoadIfNotCachedCachePolicy];
All members of SDMDownloadCache, including inherited members.
Methods| Method | Description |
|---|---|
| + (id) instance | Static DownloadCache instance Used as a global cache To make HTTPRequests use it automatically, use [HTTPRequest setDefaultCache:[DownloadCache sharedCache]];. |
| + (NSDateFormatter *) rfc1123DateFormatter | |
| + (BOOL) serverAllowsResponseCachingForRequest: (SDMHttpRequest *) request | A helper function that determines if the server has requested data should not be cached by looking at the request's response headers. |
| Member | Description |
|---|---|
| - (NSDictionary *) cachedHeadersForRequest: (id< SDMRequesting >) request | Should return an NSDictionary of cached headers for the passed request, if it is stored in the cache. |
| - (NSData *) cachedResponseDataForRequest: (id< SDMRequesting >) request | Should return the cached body of a response for the passed request, if it is stored in the cache. |
| - (void) clearCachedResponsesForStoragePolicy: (CacheStoragePolicy) cachePolicy | Clear cached data stored for the passed storage policy. |
| - (CachePolicy) defaultCachePolicy | Should return the cache policy that will be used when requests have their cache policy set to DefaultCachePolicy. |
| - (BOOL) isCachedDataCurrentForRequest: (id< SDMRequesting >) request | Should return YES if the cache considers its cached response current for the request Should return NO if the data is not cached, or (for example) if the cached headers state the request should have expired. |
| - (NSString *) pathToCachedResponseDataForRequest: (id< SDMRequesting >) request | Same as the above, but returns a path to the cached response body instead. |
| - (void) removeCachedDataForRequest: (id< SDMRequesting >) request | Should Remove cached data for a particular request. |
| - (void) storeResponseForRequest: (id< SDMRequesting >) request maxAge: (NSTimeInterval) maxAge | Should store the response for the passed request in the cache When a non-zero maxAge is passed, it should be used as the expiry time for the cached response. |
// assign the download cache to our request
[m_AsynchRequest setDownloadCache:[SDMDownloadCache instance]];
// fine-tune cache settings
[m_AsynchRequest setCacheStoragePolicy:CachePermanentlyCacheStoragePolicy];
// ...
Slightly more advanced technique
// check for network reachability
int reachabilityStatus = [[Reachability reachabilityForInternetConnection] currentReachabilityStatus];
// use cached content if no network
if (reachabilityStatus == NotReachable) {
[[SDMDownloadCache instance] setDefaultCachePolicy:UseCacheIfLoadFailsCachePolicy];
}
else {
[[SDMDownloadCache instance] setDefaultCachePolicy:OnlyLoadIfNotCachedCachePolicy];
}
Deprecated