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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "components/update_client/background_downloader_mac_delegate.h"
#import <Foundation/Foundation.h>
#include <cstdint>
#include "base/apple/foundation_util.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/functional/callback.h"
#include "base/hash/hash.h"
#include "base/logging.h"
#include "base/task/sequenced_task_runner.h"
#include "base/time/time.h"
#include "components/update_client/update_client_errors.h"
#include "url/gurl.h"
@implementation UpdateClientDownloadDelegate {
base::FilePath _download_cache;
UpdateClientDelegateDownloadCompleteCallback _download_complete_callback;
UpdateClientDelegateMetricsCollectedCallback _metrics_collected_callback;
UpdateClientDelegateDownloadProgressCallback _progress_callback;
scoped_refptr<base::SequencedTaskRunner> _callback_runner;
}
- (instancetype)
initWithDownloadCache:(base::FilePath)downloadCache
downloadCompleteCallback:
(UpdateClientDelegateDownloadCompleteCallback)downloadCompleteCallback
metricsCollectedCallback:
(UpdateClientDelegateMetricsCollectedCallback)metricsCollectedCallback
progressCallback:
(UpdateClientDelegateDownloadProgressCallback)progressCallback {
if (self = [super init]) {
_download_cache = downloadCache;
_download_complete_callback = downloadCompleteCallback;
_metrics_collected_callback = metricsCollectedCallback;
_progress_callback = progressCallback;
_callback_runner = base::SequencedTaskRunner::GetCurrentDefault();
}
return self;
}
- (void)endTask:(NSURLSessionTask*)task
withLocation:(std::optional<base::FilePath>)location
withError:(int)error {
_callback_runner->PostTask(
FROM_HERE,
base::BindOnce(_download_complete_callback,
update_client::GURLWithNSURL(task.originalRequest.URL),
location.value_or(base::FilePath()), error,
task.countOfBytesReceived,
task.countOfBytesExpectedToReceive));
}
#pragma mark - NSURLSessionDownloadDelegate
- (void)URLSession:(NSURLSession*)session
downloadTask:(NSURLSessionDownloadTask*)downloadTask
didFinishDownloadingToURL:(NSURL*)location {
if (!base::PathExists(_download_cache) &&
!base::CreateDirectory(_download_cache)) {
VLOG(1) << "Failed to create download cache directory at: "
<< _download_cache;
[self endTask:downloadTask
withLocation:std::nullopt
withError:static_cast<int>(update_client::CrxDownloaderError::
MAC_BG_CANNOT_CREATE_DOWNLOAD_CACHE)];
return;
}
const base::FilePath temp_path =
base::apple::NSStringToFilePath(location.path);
base::FilePath cache_path =
_download_cache.Append(update_client::URLToFilename(
update_client::GURLWithNSURL(downloadTask.originalRequest.URL)));
if (!base::Move(temp_path, cache_path)) {
DVLOG(1)
<< "Failed to move the downloaded file from the temporary location: "
<< temp_path << " to: " << cache_path;
[self endTask:downloadTask
withLocation:std::nullopt
withError:static_cast<int>(update_client::CrxDownloaderError::
MAC_BG_MOVE_TO_CACHE_FAIL)];
return;
}
[self endTask:downloadTask
withLocation:cache_path
withError:static_cast<int>(update_client::CrxDownloaderError::NONE)];
}
- (void)URLSession:(NSURLSession*)session
downloadTask:(nonnull NSURLSessionDownloadTask*)downloadTask
didWriteData:(int64_t)bytesWritten
totalBytesWritten:(int64_t)totalBytesWritten
totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite {
if (bytesWritten > 0) {
_callback_runner->PostTask(
FROM_HERE, base::BindOnce(_progress_callback,
update_client::GURLWithNSURL(
downloadTask.originalRequest.URL)));
}
}
#pragma mark - NSURLSessionDelegate
- (void)URLSession:(NSURLSession*)session
task:(nonnull NSURLSessionTask*)task
didCompleteWithError:(nullable NSError*)error {
if (error) {
[self endTask:task withLocation:std::nullopt withError:error.code];
}
}
- (void)URLSession:(NSURLSession*)session
task:(NSURLSessionTask*)task
didFinishCollectingMetrics:(NSURLSessionTaskMetrics*)metrics {
_callback_runner->PostTask(
FROM_HERE,
base::BindOnce(_metrics_collected_callback,
update_client::GURLWithNSURL(task.originalRequest.URL),
metrics.taskInterval.duration *
base::TimeTicks::kMillisecondsPerSecond));
}
@end
namespace update_client {
GURL GURLWithNSURL(NSURL* url) {
return url ? GURL(url.absoluteString.UTF8String) : GURL();
}
base::FilePath URLToFilename(const GURL& url) {
uint32_t hash = base::PersistentHash(url.spec());
return base::FilePath(
base::HexEncode(reinterpret_cast<uint8_t*>(&hash), sizeof(hash)));
}
} // namespace update_client
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