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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/update_client/url_fetcher_downloader.h"
#include <stdint.h>
#include <utility>
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/functional/callback_helpers.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/thread_pool.h"
#include "components/update_client/network.h"
#include "components/update_client/task_traits.h"
#include "components/update_client/update_client_errors.h"
#include "components/update_client/utils.h"
#include "url/gurl.h"
namespace update_client {
UrlFetcherDownloader::UrlFetcherDownloader(
scoped_refptr<CrxDownloader> successor,
scoped_refptr<NetworkFetcherFactory> network_fetcher_factory)
: CrxDownloader(std::move(successor)),
network_fetcher_factory_(network_fetcher_factory) {}
UrlFetcherDownloader::~UrlFetcherDownloader() = default;
base::OnceClosure UrlFetcherDownloader::DoStartDownload(const GURL& url) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
base::ThreadPool::PostTaskAndReply(
FROM_HERE, kTaskTraits,
base::BindOnce(&UrlFetcherDownloader::CreateDownloadDir, this),
base::BindOnce(&UrlFetcherDownloader::StartURLFetch, this, url));
return base::BindOnce(&UrlFetcherDownloader::Cancel, this);
}
void UrlFetcherDownloader::CreateDownloadDir() {
base::CreateNewTempDirectory(FILE_PATH_LITERAL("chrome_url_fetcher_"),
&download_dir_);
}
void UrlFetcherDownloader::StartURLFetch(const GURL& url) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (cancelled_ || download_dir_.empty()) {
Result result;
result.error =
static_cast<int>(cancelled_ ? CrxDownloaderError::CANCELLED
: CrxDownloaderError::NO_DOWNLOAD_DIR);
DownloadMetrics download_metrics;
download_metrics.url = url;
download_metrics.downloader = DownloadMetrics::kUrlFetcher;
download_metrics.error = -1;
download_metrics.downloaded_bytes = -1;
download_metrics.total_bytes = -1;
download_metrics.download_time_ms = 0;
main_task_runner()->PostTask(
FROM_HERE, base::BindOnce(&UrlFetcherDownloader::OnDownloadComplete,
this, false, result, download_metrics));
return;
}
file_path_ = download_dir_.AppendUTF8(url.ExtractFileName());
network_fetcher_ = network_fetcher_factory_->Create();
cancel_callback_ = network_fetcher_->DownloadToFile(
url, file_path_,
base::BindRepeating(&UrlFetcherDownloader::OnResponseStarted, this),
base::BindRepeating(&UrlFetcherDownloader::OnDownloadProgress, this),
base::BindOnce(&UrlFetcherDownloader::OnNetworkFetcherComplete, this));
download_start_time_ = base::TimeTicks::Now();
}
void UrlFetcherDownloader::Cancel() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
cancelled_ = true;
if (cancel_callback_) {
std::move(cancel_callback_).Run();
}
}
void UrlFetcherDownloader::OnNetworkFetcherComplete(int net_error,
int64_t content_size) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
const base::TimeTicks download_end_time(base::TimeTicks::Now());
const base::TimeDelta download_time =
download_end_time >= download_start_time_
? download_end_time - download_start_time_
: base::TimeDelta();
// Consider a 5xx response from the server as an indication to terminate
// the request and avoid overloading the server in this case.
// is not accepting requests for the moment.
int error = -1;
int extra_code1 = 0;
if (!net_error && response_code_ == 200) {
error = 0;
} else if (response_code_ != -1) {
error = response_code_;
extra_code1 = net_error;
} else {
error = net_error;
}
const bool is_handled = error == 0 || IsHttpServerError(error);
Result result;
result.error = error;
result.extra_code1 = extra_code1;
if (!error) {
result.response = file_path_;
}
DownloadMetrics download_metrics;
download_metrics.url = url();
download_metrics.downloader = DownloadMetrics::kUrlFetcher;
download_metrics.error = error;
download_metrics.extra_code1 = extra_code1;
// Tests expected -1, in case of failures and no content is available.
download_metrics.downloaded_bytes = error ? -1 : content_size;
download_metrics.total_bytes = total_bytes_;
download_metrics.download_time_ms = download_time.InMilliseconds();
VLOG(1) << "Downloaded " << content_size << " bytes in "
<< download_time.InMilliseconds() << "ms from " << url().spec()
<< " to " << result.response.value();
// Delete the download directory in the error cases.
if (error && !download_dir_.empty()) {
base::ThreadPool::PostTask(
FROM_HERE, kTaskTraits,
base::BindOnce(IgnoreResult(&RetryDeletePathRecursively),
download_dir_));
}
main_task_runner()->PostTask(
FROM_HERE, base::BindOnce(&UrlFetcherDownloader::OnDownloadComplete, this,
is_handled, result, download_metrics));
network_fetcher_ = nullptr;
}
// This callback is used to indicate that a download has been started.
void UrlFetcherDownloader::OnResponseStarted(int response_code,
int64_t content_length) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
VLOG(1) << "url fetcher response started for: " << url().spec();
response_code_ = response_code;
total_bytes_ = content_length;
}
void UrlFetcherDownloader::OnDownloadProgress(int64_t current) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
CrxDownloader::OnDownloadProgress(current, total_bytes_);
}
} // namespace update_client
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