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network_fetcher.h
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network_fetcher.h
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// Copyright 2019 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_UPDATER_NETWORK_FETCHER_H_
#define COBALT_UPDATER_NETWORK_FETCHER_H_
#include <stdint.h>
#include <memory>
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/threading/thread_checker.h"
#include "cobalt/network/network_module.h"
#include "components/update_client/network.h"
#include "cobalt/network/custom/url_fetcher_delegate.h"
namespace base {
class FilePath;
class SequencedTaskRunner;
} // namespace base
namespace cobalt {
namespace updater {
typedef enum UrlFetcherType {
kUrlFetcherTypePostRequest,
#if defined(IN_MEMORY_UPDATES)
kUrlFetcherTypeDownloadToString,
#else
kUrlFetcherTypeDownloadToFile,
#endif
} UrlFetcherType;
class NetworkFetcher : public update_client::NetworkFetcher,
public net::URLFetcherDelegate {
public:
using ResponseStartedCallback =
update_client::NetworkFetcher::ResponseStartedCallback;
using ProgressCallback = update_client::NetworkFetcher::ProgressCallback;
using PostRequestCompleteCallback =
update_client::NetworkFetcher::PostRequestCompleteCallback;
#if defined(IN_MEMORY_UPDATES)
using DownloadToStringCompleteCallback =
update_client::NetworkFetcher::DownloadToStringCompleteCallback;
#else
using DownloadToFileCompleteCallback =
update_client::NetworkFetcher::DownloadToFileCompleteCallback;
#endif
explicit NetworkFetcher(const network::NetworkModule* network_module);
~NetworkFetcher() override;
// update_client::NetworkFetcher interface.
void PostRequest(
const GURL& url, const std::string& post_data,
const base::flat_map<std::string, std::string>& post_additional_headers,
ResponseStartedCallback response_started_callback,
ProgressCallback progress_callback,
PostRequestCompleteCallback post_request_complete_callback) override;
#if defined(IN_MEMORY_UPDATES)
// Does not take ownership of |dst|, which must refer to a valid string that
// outlives this object.
void DownloadToString(const GURL& url, std::string* dst,
ResponseStartedCallback response_started_callback,
ProgressCallback progress_callback,
DownloadToStringCompleteCallback
download_to_string_complete_callback) override;
#else
void DownloadToFile(const GURL& url, const base::FilePath& file_path,
ResponseStartedCallback response_started_callback,
ProgressCallback progress_callback,
DownloadToFileCompleteCallback
download_to_file_complete_callback) override;
#endif
void Cancel() override;
// net::URLFetcherDelegate interface.
void OnURLFetchResponseStarted(const net::URLFetcher* source) override;
void OnURLFetchComplete(const net::URLFetcher* source) override;
void OnURLFetchDownloadProgress(const net::URLFetcher* source,
int64_t current, int64_t total,
int64_t current_network_bytes) override;
private:
// Thread checker ensures all calls to the NetworkFetcher are made from the
// same thread that it is created in.
THREAD_CHECKER(thread_checker_);
// Empty struct to ensure the caller of |HandleError()| knows that |this|
// may have been destroyed and handles it appropriately.
struct ReturnWrapper {
void InvalidateThis() {}
};
ReturnWrapper HandleError(const std::string& error_message)
WARN_UNUSED_RESULT;
void CreateUrlFetcher(const GURL& url,
const net::URLFetcher::RequestType request_type);
void OnPostRequestComplete(const net::URLFetcher* source,
const int status_error);
#if defined(IN_MEMORY_UPDATES)
void OnDownloadToStringComplete(const net::URLFetcher* source,
const int status_error);
#else
void OnDownloadToFileComplete(const net::URLFetcher* source,
const int status_error);
#endif
static constexpr int kMaxRetriesOnNetworkChange = 3;
scoped_refptr<base::SequencedTaskRunner> main_thread_task_runner_;
std::unique_ptr<net::URLFetcher> url_fetcher_;
UrlFetcherType url_fetcher_type_;
ResponseStartedCallback response_started_callback_;
ProgressCallback progress_callback_;
PostRequestCompleteCallback post_request_complete_callback_;
#if defined(IN_MEMORY_UPDATES)
DownloadToStringCompleteCallback download_to_string_complete_callback_;
std::string* dst_str_; // not owned, can't be null
#else
DownloadToFileCompleteCallback download_to_file_complete_callback_;
#endif
const network::NetworkModule* network_module_;
DISALLOW_COPY_AND_ASSIGN(NetworkFetcher);
};
// Network fetcher factory.
class NetworkFetcherFactoryCobalt
: public update_client::NetworkFetcherFactory {
public:
explicit NetworkFetcherFactoryCobalt(network::NetworkModule* network_module);
std::unique_ptr<update_client::NetworkFetcher> Create() const override;
protected:
~NetworkFetcherFactoryCobalt() override;
private:
THREAD_CHECKER(thread_checker_);
network::NetworkModule* network_module_;
DISALLOW_COPY_AND_ASSIGN(NetworkFetcherFactoryCobalt);
};
} // namespace updater
} // namespace cobalt
#endif // COBALT_UPDATER_NETWORK_FETCHER_H_