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NSURLCache.m
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NSURLCache.m
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/** Implementation for NSURLCache for GNUstep
Copyright (C) 2006 Software Foundation, Inc.
Written by: Richard Frith-Macdonald <rfm@gnu.org>
Date: 2006
This file is part of the GNUstep Base Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110 USA.
*/
#import "common.h"
#import "GSPThread.h"
#if GS_HAVE_NSURLSESSION
#import <Foundation/NSURLSession.h>
#endif
#define EXPOSE_NSURLCache_IVARS 1
#import "GSURLPrivate.h"
// FIXME ... locking and disk storage needed
typedef struct {
unsigned diskCapacity;
unsigned memoryCapacity;
unsigned diskUsage;
unsigned memoryUsage;
NSString *path;
NSMutableDictionary *memory;
} Internal;
#define this ((Internal*)(self->_NSURLCacheInternal))
#define inst ((Internal*)(o->_NSURLCacheInternal))
static NSURLCache *shared = nil;
static gs_mutex_t cacheLock = GS_MUTEX_INIT_STATIC;
@implementation NSURLCache
+ (id) allocWithZone: (NSZone*)z
{
NSURLCache *o = [super allocWithZone: z];
if (o != nil)
{
o->_NSURLCacheInternal = NSZoneCalloc(z, 1, sizeof(Internal));
}
return o;
}
+ (void) setSharedURLCache: (NSURLCache *)cache
{
GS_MUTEX_LOCK(cacheLock);
ASSIGN(shared, cache);
GS_MUTEX_UNLOCK(cacheLock);
}
- (void) dealloc
{
if (this != 0)
{
RELEASE(this->memory);
RELEASE(this->path);
NSZoneFree([self zone], this);
}
[super dealloc];
}
+ (NSURLCache *) sharedURLCache
{
NSURLCache *c;
GS_MUTEX_LOCK(cacheLock);
if (shared == nil)
{
NSString *path = nil;
// FIXME user-library-path/Caches/current-app-name
shared = [[self alloc] initWithMemoryCapacity: 4 * 1024 * 1024
diskCapacity: 20 * 1024 * 1024
diskPath: path];
}
c = RETAIN(shared);
GS_MUTEX_UNLOCK(cacheLock);
return AUTORELEASE(c);
}
- (NSCachedURLResponse *) cachedResponseForRequest: (NSURLRequest *)request
{
// FIXME ... handle disk cache
return [this->memory objectForKey: request];
}
- (NSUInteger) currentDiskUsage
{
return this->diskUsage;
}
- (NSUInteger) currentMemoryUsage
{
return this->memoryUsage;
}
- (NSUInteger) diskCapacity
{
return this->diskCapacity;
}
- (id) initWithMemoryCapacity: (NSUInteger)memoryCapacity
diskCapacity: (NSUInteger)diskCapacity
diskPath: (NSString *)path
{
if ((self = [super init]) != nil)
{
this->diskUsage = 0;
this->diskCapacity = diskCapacity;
this->memoryUsage = 0;
this->memoryCapacity = memoryCapacity;
this->path = [path copy];
this->memory = [NSMutableDictionary new];
}
return self;
}
- (NSUInteger) memoryCapacity
{
return this->memoryCapacity;
}
- (void) removeAllCachedResponses
{
// FIXME ... disk storage
[this->memory removeAllObjects];
this->diskUsage = 0;
this->memoryUsage = 0;
}
- (void) removeCachedResponseForRequest: (NSURLRequest *)request
{
NSCachedURLResponse *item = [self cachedResponseForRequest: request];
if (item != nil)
{
// FIXME ... disk storage
this->memoryUsage -= [[item data] length];
[this->memory removeObjectForKey: request];
}
}
- (void) setDiskCapacity: (NSUInteger)diskCapacity
{
[self notImplemented: _cmd];
// FIXME
}
- (void) setMemoryCapacity: (NSUInteger)memoryCapacity
{
[self notImplemented: _cmd];
// FIXME
}
- (void) storeCachedResponse: (NSCachedURLResponse *)cachedResponse
forRequest: (NSURLRequest *)request
{
switch ([cachedResponse storagePolicy])
{
case NSURLCacheStorageAllowed:
// FIXME ... maybe on disk?
case NSURLCacheStorageAllowedInMemoryOnly:
{
unsigned size = [[cachedResponse data] length];
if (size < this->memoryCapacity)
{
NSCachedURLResponse *old;
old = [this->memory objectForKey: request];
if (old != nil)
{
this->memoryUsage -= [[old data] length];
[this->memory removeObjectForKey: request];
}
while (this->memoryUsage + size > this->memoryCapacity)
{
// FIXME ... should delete least recently used.
[self removeCachedResponseForRequest:
[[this->memory allKeys] lastObject]];
}
[this->memory setObject: cachedResponse forKey: request];
this->memoryUsage += size;
}
}
break;
case NSURLCacheStorageNotAllowed:
break;
default:
[NSException raise: NSInternalInconsistencyException
format: @"storing cached response with bad policy (%d)",
[cachedResponse storagePolicy]];
}
}
@end
#if GS_HAVE_NSURLSESSION
@implementation NSURLCache (NSURLSessionTaskAdditions)
- (void) storeCachedResponse: (NSCachedURLResponse*)cachedResponse
forDataTask: (NSURLSessionDataTask*)dataTask
{
[self storeCachedResponse: cachedResponse
forRequest: [dataTask currentRequest]];
}
- (NSCachedURLResponse*) cachedResponseForDataTask:
(NSURLSessionDataTask*)dataTask
{
return [self cachedResponseForRequest: [dataTask currentRequest]];
}
- (void) removeCachedResponseForDataTask: (NSURLSessionDataTask*)dataTask
{
[self removeCachedResponseForRequest: [dataTask currentRequest]];
}
@end
#endif