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// 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 CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_JOB_H_
#define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_JOB_H_
#include "base/macros.h"
#include "base/time/time.h"
#include "content/browser/byte_stream.h"
#include "content/common/content_export.h"
#include "content/public/browser/download_danger_type.h"
#include "content/public/browser/download_interrupt_reasons.h"
namespace content {
class DownloadItemImpl;
class WebContents;
// DownloadJob lives on UI thread and subclasses implement actual download logic
// and interact with DownloadItemImpl.
// The base class is a friend class of DownloadItemImpl.
class CONTENT_EXPORT DownloadJob {
public:
explicit DownloadJob(DownloadItemImpl* download_item);
virtual ~DownloadJob();
// Download operations.
virtual void Start() = 0;
virtual void Cancel(bool user_cancel) = 0;
virtual void Pause();
virtual void Resume(bool resume_request);
bool is_paused() const { return is_paused_; }
// Return the WebContents associated with the download. Usually used to
// associate a browser window for any UI that needs to be displayed to the
// user.
// Or return nullptr if the download is not associated with an active
// WebContents.
virtual WebContents* GetWebContents() const = 0;
// Returns whether the download is parallelizable. The download may not send
// parallel requests as it can be disabled through flags.
virtual bool IsParallelizable() const;
// Cancel a particular request starts from |offset|, while the download is not
// canceled. Used in parallel download.
// TODO(xingliu): Remove this function if download job owns download file.
virtual void CancelRequestWithOffset(int64_t offset);
protected:
void StartDownload() const;
// Add a byte stream to the download sink. Return false if we start to
// destroy download file.
bool AddByteStream(std::unique_ptr<ByteStreamReader> stream_reader,
int64_t offset,
int64_t length);
DownloadItemImpl* download_item_;
private:
// If the download progress is paused by the user.
bool is_paused_;
DISALLOW_COPY_AND_ASSIGN(DownloadJob);
};
} // namespace content
#endif // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_JOB_H_
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