Revision cc176feb asi-http-request-with-pithos/Classes/ASIDownloadCache.m
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static NSString *sessionCacheFolder = @"SessionStore"; |
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static NSString *permanentCacheFolder = @"PermanentStore"; |
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static NSArray *fileExtensionsToHandleAsHTML = nil; |
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@interface ASIDownloadCache () |
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+ (NSString *)keyForURL:(NSURL *)url; |
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@implementation ASIDownloadCache |
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+ (void)initialize |
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{
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if (self == [ASIDownloadCache class]) {
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// Obviously this is not an exhaustive list, but hopefully these are the most commonly used and this will 'just work' for the widest range of people |
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// I imagine many web developers probably use url rewriting anyway |
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fileExtensionsToHandleAsHTML = [[NSArray alloc] initWithObjects:@"asp",@"aspx",@"jsp",@"php",@"rb",@"py",@"pl",@"cgi", nil]; |
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} |
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} |
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- (id)init |
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{
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self = [super init]; |
| ... | ... | |
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- (NSDate *)expiryDateForRequest:(ASIHTTPRequest *)request maxAge:(NSTimeInterval)maxAge |
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{
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NSMutableDictionary *responseHeaders = [NSMutableDictionary dictionaryWithDictionary:[request responseHeaders]]; |
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// If we weren't given a custom max-age, lets look for one in the response headers |
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if (!maxAge) {
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NSString *cacheControl = [[responseHeaders objectForKey:@"Cache-Control"] lowercaseString]; |
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if (cacheControl) {
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NSScanner *scanner = [NSScanner scannerWithString:cacheControl]; |
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[scanner scanUpToString:@"max-age" intoString:NULL]; |
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if ([scanner scanString:@"max-age" intoString:NULL]) {
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[scanner scanString:@"=" intoString:NULL]; |
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[scanner scanDouble:&maxAge]; |
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} |
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} |
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} |
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// RFC 2612 says max-age must override any Expires header |
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if (maxAge) {
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return [[NSDate date] addTimeInterval:maxAge]; |
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} else {
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NSString *expires = [responseHeaders objectForKey:@"Expires"]; |
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if (expires) {
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return [ASIHTTPRequest dateFromRFC1123String:expires]; |
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} |
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} |
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return nil; |
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return [ASIHTTPRequest expiryDateForRequest:request maxAge:maxAge]; |
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} |
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- (void)storeResponseForRequest:(ASIHTTPRequest *)request maxAge:(NSTimeInterval)maxAge |
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if ([request responseData]) {
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[[request responseData] writeToFile:dataPath atomically:NO]; |
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} else if ([request downloadDestinationPath] && ![[request downloadDestinationPath] isEqualToString:dataPath]) {
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} else if ([request downloadDestinationPath] && ![[request downloadDestinationPath] isEqualToString:dataPath]) {
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NSError *error = nil; |
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[[[[NSFileManager alloc] init] autorelease] copyItemAtPath:[request downloadDestinationPath] toPath:dataPath error:&error]; |
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NSFileManager* manager = [[NSFileManager alloc] init]; |
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if ([manager fileExistsAtPath:dataPath]) {
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[manager removeItemAtPath:dataPath error:&error]; |
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} |
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[manager copyItemAtPath:[request downloadDestinationPath] toPath:dataPath error:&error]; |
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[manager release]; |
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} |
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[[self accessLock] unlock]; |
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} |
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{
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// Grab the file extension, if there is one. We do this so we can save the cached response with the same file extension - this is important if you want to display locally cached data in a web view |
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NSString *extension = [[url path] pathExtension]; |
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if (![extension length]) {
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// If the url doesn't have an extension, we'll add one so a webview can read it when locally cached |
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// If the url has the extension of a common web scripting language, we'll change the extension on the cached path to html for the same reason |
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if (![extension length] || [[[self class] fileExtensionsToHandleAsHTML] containsObject:[extension lowercaseString]]) {
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extension = @"html"; |
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} |
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return [self pathToFile:[[[self class] keyForURL:url] stringByAppendingPathExtension:extension]]; |
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} |
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+ (NSArray *)fileExtensionsToHandleAsHTML |
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{
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return fileExtensionsToHandleAsHTML; |
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} |
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- (NSString *)pathToCachedResponseHeadersForURL:(NSURL *)url |
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{
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return [self pathToFile:[[[self class] keyForURL:url] stringByAppendingPathExtension:@"cachedheaders"]]; |
| ... | ... | |
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// Grab the file extension, if there is one. We do this so we can save the cached response with the same file extension - this is important if you want to display locally cached data in a web view |
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NSString *extension = [[[request url] path] pathExtension]; |
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if (![extension length]) {
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// If the url doesn't have an extension, we'll add one so a webview can read it when locally cached |
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// If the url has the extension of a common web scripting language, we'll change the extension on the cached path to html for the same reason |
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if (![extension length] || [[[self class] fileExtensionsToHandleAsHTML] containsObject:[extension lowercaseString]]) {
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extension = @"html"; |
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} |
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path = [path stringByAppendingPathComponent:[[[self class] keyForURL:[request url]] stringByAppendingPathExtension:extension]]; |
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