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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.
#include "chrome/updater/net/fallback_net_fetcher.h"
#include <cstdint>
#include <memory>
#include <string>
#include <utility>
#include "base/containers/flat_map.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/sequence_checker.h"
#include "components/update_client/cancellation.h"
#include "components/update_client/network.h"
#include "url/gurl.h"
namespace updater {
FallbackNetFetcher::FallbackNetFetcher(
std::unique_ptr<update_client::NetworkFetcher> impl,
std::unique_ptr<update_client::NetworkFetcher> next)
: impl_(std::move(impl)), next_(std::move(next)) {}
FallbackNetFetcher::~FallbackNetFetcher() = default;
void FallbackNetFetcher::PostRequest(
const GURL& url,
const std::string& post_data,
const std::string& content_type,
const base::flat_map<std::string, std::string>& post_additional_headers,
update_client::NetworkFetcher::ResponseStartedCallback
response_started_callback,
update_client::NetworkFetcher::ProgressCallback progress_callback,
update_client::NetworkFetcher::PostRequestCompleteCallback
post_request_complete_callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
impl_->PostRequest(
url, post_data, content_type, post_additional_headers,
base::BindRepeating(
&FallbackNetFetcher::ResponseStarted,
base::Unretained(this), // Assume the fetcher outlives the fetch.
response_started_callback),
progress_callback,
base::BindOnce(
&FallbackNetFetcher::PostRequestDone,
base::Unretained(this), // Assume the fetcher outlives the fetch.
url, post_data, content_type, post_additional_headers,
response_started_callback, progress_callback,
std::move(post_request_complete_callback)));
}
void FallbackNetFetcher::ResponseStarted(
update_client::NetworkFetcher::ResponseStartedCallback
response_started_callback,
int32_t http_status_code,
int64_t content_length) {
http_status_code_ = http_status_code;
response_started_callback.Run(http_status_code, content_length);
}
void FallbackNetFetcher::PostRequestDone(
const GURL& url,
const std::string& post_data,
const std::string& content_type,
const base::flat_map<std::string, std::string>& post_additional_headers,
update_client::NetworkFetcher::ResponseStartedCallback
response_started_callback,
update_client::NetworkFetcher::ProgressCallback progress_callback,
update_client::NetworkFetcher::PostRequestCompleteCallback
post_request_complete_callback,
std::optional<std::string> response_body,
int net_error,
const std::string& header_etag,
const std::string& header_x_cup_server_proof,
const std::string& header_set_cookie,
int64_t xheader_retry_after_sec) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
const int should_fallback = net_error || (http_status_code_ != 200);
if (should_fallback && next_) {
VLOG(1) << __func__ << " Falling back to next NetFetcher for " << url
<< ", error: " << net_error
<< ", HTTP status: " << http_status_code_;
next_->PostRequest(url, post_data, content_type, post_additional_headers,
response_started_callback, progress_callback,
std::move(post_request_complete_callback));
return;
}
std::move(post_request_complete_callback)
.Run(std::move(response_body), net_error, header_etag,
header_x_cup_server_proof, header_set_cookie,
xheader_retry_after_sec);
}
base::OnceClosure FallbackNetFetcher::DownloadToFile(
const GURL& url,
const base::FilePath& file_path,
update_client::NetworkFetcher::ResponseStartedCallback
response_started_callback,
update_client::NetworkFetcher::ProgressCallback progress_callback,
update_client::NetworkFetcher::DownloadToFileCompleteCallback
download_to_file_complete_callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
cancellation_->OnCancel(impl_->DownloadToFile(
url, file_path,
base::BindRepeating(
&FallbackNetFetcher::ResponseStarted,
base::Unretained(this), // Assume the fetcher outlives the fetch.
response_started_callback),
progress_callback,
base::BindOnce(
&FallbackNetFetcher::DownloadToFileDone,
base::Unretained(this), // Assume the fetcher outlives the fetch.
url, file_path, response_started_callback, progress_callback,
std::move(download_to_file_complete_callback))));
return base::BindOnce(&update_client::Cancellation::Cancel, cancellation_);
}
void FallbackNetFetcher::DownloadToFileDone(
const GURL& url,
const base::FilePath& file_path,
update_client::NetworkFetcher::ResponseStartedCallback
response_started_callback,
update_client::NetworkFetcher::ProgressCallback progress_callback,
update_client::NetworkFetcher::DownloadToFileCompleteCallback
download_to_file_complete_callback,
int net_error,
int64_t content_size) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
cancellation_->Clear();
const int should_fallback = net_error || (http_status_code_ != 200);
if (should_fallback && next_) {
VLOG(1) << __func__ << " Falling back to next NetFetcher for " << url;
cancellation_->OnCancel(next_->DownloadToFile(
url, file_path, response_started_callback, progress_callback,
std::move(download_to_file_complete_callback)));
return;
}
std::move(download_to_file_complete_callback).Run(net_error, content_size);
}
} // namespace updater
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