transmission/macosx/BlocklistDownloader.m

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/******************************************************************************
* $Id$
*
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* Copyright (c) 2008-2009 Transmission authors and contributors
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*
* 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 "BlocklistDownloader.h"
#import "BlocklistDownloaderViewController.h"
#import "BlocklistScheduler.h"
#import "PrefsController.h"
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#define LIST_URL @"http://download.m0k.org/transmission/files/level1.gz"
#define DESTINATION [NSTemporaryDirectory() stringByAppendingPathComponent: @"level1.gz"]
@interface BlocklistDownloader (Private)
- (void) startDownload;
- (void) finishDownloadSuccess;
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@end
@implementation BlocklistDownloader
BlocklistDownloader * fDownloader = nil;
+ (BlocklistDownloader *) downloader
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{
if (!fDownloader)
{
fDownloader = [[BlocklistDownloader alloc] init];
[fDownloader startDownload];
}
return fDownloader;
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}
+ (BOOL) isRunning
{
return fDownloader != nil;
}
- (void) setViewController: (BlocklistDownloaderViewController *) viewController
{
fViewController = viewController;
if (fViewController)
{
switch (fState)
{
case BLOCKLIST_DL_START:
[fViewController setStatusStarting];
break;
case BLOCKLIST_DL_DOWNLOADING:
[fViewController setStatusProgressForCurrentSize: fCurrentSize expectedSize: fExpectedSize];
break;
case BLOCKLIST_DL_PROCESSING:
[fViewController setStatusProcessing];
break;
}
}
}
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- (void) dealloc
{
[fDownload release];
[super dealloc];
}
- (void) cancelDownload
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{
[fViewController setFinished];
[fDownload cancel];
[[BlocklistScheduler scheduler] updateSchedule];
fDownloader = nil;
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[self release];
}
- (void) download: (NSURLDownload *) download didReceiveResponse: (NSURLResponse *) response
{
fState = BLOCKLIST_DL_DOWNLOADING;
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fCurrentSize = 0;
fExpectedSize = [response expectedContentLength];
[fViewController setStatusProgressForCurrentSize: fCurrentSize expectedSize: fExpectedSize];
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}
- (void) download: (NSURLDownload *) download didReceiveDataOfLength: (NSUInteger) length
{
fCurrentSize += length;
[fViewController setStatusProgressForCurrentSize: fCurrentSize expectedSize: fExpectedSize];
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}
- (void) download: (NSURLDownload *) download didFailWithError: (NSError *) error
{
[fViewController setFailed: [error localizedDescription]];
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[[BlocklistScheduler scheduler] updateSchedule];
fDownloader = nil;
[self release];
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}
- (void) downloadDidFinish: (NSURLDownload *) download
{
fState = BLOCKLIST_DL_PROCESSING;
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[self performSelectorInBackground: @selector(finishDownloadSuccess) withObject: nil];
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}
@end
@implementation BlocklistDownloader (Private)
- (void) startDownload
{
fState = BLOCKLIST_DL_START;
[[BlocklistScheduler scheduler] cancelSchedule];
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NSURLRequest * request = [NSURLRequest requestWithURL: [NSURL URLWithString: LIST_URL]];
fDownload = [[NSURLDownload alloc] initWithRequest: request delegate: self];
[fDownload setDestination: DESTINATION allowOverwrite: YES];
}
- (void) finishDownloadSuccess
{
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
[fViewController setStatusProcessing];
//process data
tr_blocklistSetContent([PrefsController handle], [DESTINATION UTF8String]);
//delete downloaded file
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[[NSFileManager defaultManager] removeItemAtPath: DESTINATION error: NULL];
[fViewController setFinished];
//update last updated date for schedule
[[NSUserDefaults standardUserDefaults] setObject: [NSDate date] forKey: @"BlocklistLastUpdate"];
[[BlocklistScheduler scheduler] updateSchedule];
[[NSNotificationCenter defaultCenter] postNotificationName: @"BlocklistUpdated" object: nil];
[pool release];
fDownloader = nil;
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[self release];
}
@end