blob: 26b57219725772cee3fb369f7a7840aa1ed09938 [file] [log] [blame]
// Copyright 2017 The Chromium Authors. All rights reserved.
// 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/macros.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_request_handle_interface.h"
#include "components/download/public/common/download_url_parameters.h"
#include "components/download/public/common/url_download_handler.h"
namespace net {
class URLRequestContextGetter;
} // namespace net
namespace service_manager {
class Connector;
} // namespace service_manager
namespace download {
class DownloadURLLoaderFactoryGetter;
// 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,
int64_t length);
virtual ~DownloadWorker();
int64_t offset() const { return offset_; }
int64_t length() const { return length_; }
// Send network request to ask for a download.
void SendRequest(
std::unique_ptr<DownloadUrlParameters> params,
scoped_refptr<download::DownloadURLLoaderFactoryGetter>
url_loader_factory_getter,
scoped_refptr<net::URLRequestContextGetter> url_request_context_getter,
service_manager::Connector* connector);
// 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,
scoped_refptr<download::DownloadURLLoaderFactoryGetter>
url_loader_factory_getter,
const DownloadUrlParameters::OnStartedCallback& callback) override;
void OnUrlDownloadStopped(UrlDownloadHandler* downloader) override;
void OnUrlDownloadHandlerCreated(
UrlDownloadHandler::UniqueUrlDownloadHandlerPtr downloader) override;
DownloadWorker::Delegate* const delegate_;
// The starting position of the content for this worker to download.
int64_t offset_;
// The length of the request. May be 0 to fetch to the end of the file.
int64_t length_;
// States of the worker.
bool is_paused_;
bool is_canceled_;
bool is_user_cancel_;
// Used to control the network request. Live on UI thread.
std::unique_ptr<DownloadRequestHandleInterface> request_handle_;
// Used to handle the url request. Live and die on IO thread.
UrlDownloadHandler::UniqueUrlDownloadHandlerPtr url_download_handler_;
base::WeakPtrFactory<DownloadWorker> weak_factory_{this};
DISALLOW_COPY_AND_ASSIGN(DownloadWorker);
};
} // namespace download
#endif // COMPONENTS_DOWNLOAD_PUBLIC_COMMON_DOWNLOAD_WORKER_H_