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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_DOWNLOAD_INTERNAL_COMMON_DOWNLOAD_WORKER_H_
#define COMPONENTS_DOWNLOAD_INTERNAL_COMMON_DOWNLOAD_WORKER_H_
#include <memory>
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "components/download/public/common/download_export.h"
#include "components/download/public/common/download_url_parameters.h"
#include "components/download/public/common/url_download_handler.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "services/device/public/mojom/wake_lock_provider.mojom.h"
namespace download {
// Helper class used to send subsequent range requests to fetch slices of the
// file after handling response of the original non-range request.
// TODO(xingliu): we should consider to reuse this class for single connection
// download.
class COMPONENTS_DOWNLOAD_EXPORT DownloadWorker
: public UrlDownloadHandler::Delegate {
public:
class Delegate {
public:
// Called when the the input stream is established after server response is
// handled. The stream contains data starts from |offset| of the
// destination file.
virtual void OnInputStreamReady(
DownloadWorker* worker,
std::unique_ptr<InputStream> input_stream,
std::unique_ptr<DownloadCreateInfo> download_create_info) = 0;
};
DownloadWorker(DownloadWorker::Delegate* delegate, int64_t offset);
DownloadWorker(const DownloadWorker&) = delete;
DownloadWorker& operator=(const DownloadWorker&) = delete;
virtual ~DownloadWorker();
int64_t offset() const { return offset_; }
// Send network request to ask for a download.
void SendRequest(
std::unique_ptr<DownloadUrlParameters> params,
URLLoaderFactoryProvider* url_loader_factory_provider,
mojo::PendingRemote<device::mojom::WakeLockProvider> wake_lock_provider);
// Download operations.
void Pause();
void Resume();
void Cancel(bool user_cancel);
private:
// UrlDownloader::Delegate implementation.
void OnUrlDownloadStarted(
std::unique_ptr<DownloadCreateInfo> create_info,
std::unique_ptr<InputStream> input_stream,
URLLoaderFactoryProvider::URLLoaderFactoryProviderPtr
url_loader_factory_provider,
UrlDownloadHandlerID downloader,
DownloadUrlParameters::OnStartedCallback callback) override;
void OnUrlDownloadStopped(UrlDownloadHandlerID downloader) override;
void OnUrlDownloadHandlerCreated(
UrlDownloadHandler::UniqueUrlDownloadHandlerPtr downloader) override;
const raw_ptr<DownloadWorker::Delegate> delegate_;
// The starting position of the content for this worker to download.
int64_t offset_;
// States of the worker.
bool is_paused_;
bool is_canceled_;
// Used to handle the url request. Live and die on IO thread.
UrlDownloadHandler::UniqueUrlDownloadHandlerPtr url_download_handler_;
base::WeakPtrFactory<DownloadWorker> weak_factory_{this};
};
} // namespace download
#endif // COMPONENTS_DOWNLOAD_INTERNAL_COMMON_DOWNLOAD_WORKER_H_
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