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Implement Timeout Based Caches

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This commit is contained in:
Jeremy Ellison
2011-06-27 12:39:17 -04:00
committed by Blake Watters
parent 16f6f004b5
commit f98566b837
6 changed files with 146 additions and 24 deletions
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66
Code/Network/RKRequest.m
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@@ -27,7 +27,8 @@
@synthesize URL = _URL, URLRequest = _URLRequest, delegate = _delegate, additionalHTTPHeaders = _additionalHTTPHeaders,
params = _params, userData = _userData, username = _username, password = _password, method = _method,
forceBasicAuthentication = _forceBasicAuthentication, cachePolicy = _cachePolicy, cache = _cache;
forceBasicAuthentication = _forceBasicAuthentication, cachePolicy = _cachePolicy, cache = _cache,
cacheTimeoutInterval = _cacheTimeoutInterval;
#if TARGET_OS_IPHONE
@synthesize backgroundPolicy = _backgroundPolicy, backgroundTaskIdentifier = _backgroundTaskIdentifier;
@@ -44,6 +45,7 @@
[self reset];
_forceBasicAuthentication = NO;
_cachePolicy = RKRequestCachePolicyDefault;
_cacheTimeoutInterval = 0;
}
return self;
}
@@ -268,23 +270,37 @@
[[NSNotificationCenter defaultCenter] postNotificationName:RKRequestSentNotification object:self userInfo:nil];
}
- (BOOL)shouldDispatchRequest {
- (BOOL)shouldLoadFromCache {
// if RKRequestCachePolicyEnabled or if RKRequestCachePolicyTimeout and we are in the timeout
if ([self.cache hasResponseForRequest:self]) {
if (self.cachePolicy & RKRequestCachePolicyEnabled) {
return YES;
} else if (self.cachePolicy & RKRequestCachePolicyTimeout) {
NSDate* date = [self.cache cacheDateForRequest:self];
NSTimeInterval interval = [[NSDate date] timeIntervalSinceDate:date];
return interval <= self.cacheTimeoutInterval;
}
}
return NO;
}
- (RKResponse*)loadResponseFromCache {
RKLogDebug(@"Found cached content, loading...");
return [self.cache responseForRequest:self];
}
- (BOOL)shouldDispatchRequest {
return [RKClient sharedClient] == nil || [[RKClient sharedClient] isNetworkAvailable];
}
- (void)sendAsynchronously {
NSAssert(NO == _isLoading || NO == _isLoaded, @"Cannot send a request that is loading or loaded without resetting it first.");
_sentSynchronously = NO;
if (self.cachePolicy & RKRequestCachePolicyEnabled) {
if ([self.cache hasResponseForRequest:self]) {
RKLogDebug(@"Found cached content, loading...");
_isLoading = YES;
[self didFinishLoad:[self.cache responseForRequest:self]];
return;
}
}
if ([self shouldDispatchRequest]) {
_sentSynchronously = NO;
if ([self shouldLoadFromCache]) {
RKResponse* response = [self loadResponseFromCache];
_isLoading = YES;
[self didFinishLoad:response];
} else if ([self shouldDispatchRequest]) {
#if TARGET_OS_IPHONE
// Background Request Policy support
UIApplication* app = [UIApplication sharedApplication];
@@ -327,7 +343,7 @@
[self.cache hasResponseForRequest:self]) {
_isLoading = YES;
[self didFinishLoad:[self.cache responseForRequest:self]];
[self didFinishLoad:[self loadResponseFromCache]];
} else {
RKLogCritical(@"SharedClient = %@ and network availability = %d", [RKClient sharedClient], [[RKClient sharedClient] isNetworkAvailable]);
@@ -349,12 +365,16 @@
RKResponse* response = nil;
_sentSynchronously = YES;
if ([self shouldDispatchRequest]) {
RKLogDebug(@"Sending synchronous %@ request to URL %@.", [self HTTPMethod], [[self URL] absoluteString]);
if (![self prepareURLRequest]) {
// TODO: Logging
return nil;
}
if ([self shouldLoadFromCache]) {
response = [self loadResponseFromCache];
_isLoading = YES;
[self didFinishLoad:response];
} else if ([self shouldDispatchRequest]) {
RKLogDebug(@"Sending synchronous %@ request to URL %@.", [self HTTPMethod], [[self URL] absoluteString]);
if (![self prepareURLRequest]) {
// TODO: Logging
return nil;
}
[[NSNotificationCenter defaultCenter] postNotificationName:RKRequestSentNotification object:self userInfo:nil];
@@ -378,7 +398,7 @@
if (_cachePolicy & RKRequestCachePolicyLoadIfOffline &&
[self.cache hasResponseForRequest:self]) {
response = [self.cache responseForRequest:self];
response = [self loadResponseFromCache];
} else {
NSString* errorMessage = [NSString stringWithFormat:@"The client is unable to contact the resource at %@", [[self URL] absoluteString]];
@@ -404,7 +424,7 @@
if (_cachePolicy & RKRequestCachePolicyLoadOnError &&
[self.cache hasResponseForRequest:self]) {
[self didFinishLoad:[self.cache responseForRequest:self]];
[self didFinishLoad:[self loadResponseFromCache]];
} else {
_isLoading = NO;
@@ -429,7 +449,7 @@
RKResponse* finalResponse = response;
if ((_cachePolicy & RKRequestCachePolicyEtag) && [response isNotModified]) {
finalResponse = [self.cache responseForRequest:self];
finalResponse = [self loadResponseFromCache];
}
if (![response wasLoadedFromCache] && [response isSuccessful] && (_cachePolicy != RKRequestCachePolicyNone)) {