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/****************************************************************************
**
** Copyright (C) 2017 Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWebEngine module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef URL_REQUEST_CUSTOM_JOB_PROXY_H_
#define URL_REQUEST_CUSTOM_JOB_PROXY_H_

#include "base/memory/weak_ptr.h"
#include "base/optional.h"
#include "base/sequenced_task_runner.h"
#include "url/gurl.h"
#include "url/origin.h"
#include <QtCore/QPointer>

QT_FORWARD_DECLARE_CLASS(QIODevice)

namespace QtWebEngineCore {

class URLRequestCustomJob;
class URLRequestCustomJobDelegate;
class ProfileAdapter;

// Used to comunicate between URLRequestCustomJob living on the IO thread
// and URLRequestCustomJobDelegate living on the UI thread.
class URLRequestCustomJobProxy : public base::RefCountedThreadSafe<URLRequestCustomJobProxy>
{

public:
    class Client {
    public:
        std::string m_mimeType;
        std::string m_charset;
        GURL m_redirect;
        QIODevice *m_device;
        int64_t m_firstBytePosition;
        int m_error;
        virtual void notifyExpectedContentSize(qint64 size) = 0;
        virtual void notifyHeadersComplete() = 0;
        virtual void notifyCanceled() = 0;
        virtual void notifyAborted() = 0;
        virtual void notifyStartFailure(int) = 0;
        virtual void notifyReadyRead() = 0;
        virtual base::SequencedTaskRunner *taskRunner() = 0;
    };

    URLRequestCustomJobProxy(Client *client,
                             const std::string &scheme,
                             QPointer<ProfileAdapter> profileAdapter);
    ~URLRequestCustomJobProxy();

    // Called from URLRequestCustomJobDelegate via post:
    //void setReplyCharset(const std::string &);
    void reply(std::string mimeType, QIODevice *device);
    void redirect(GURL url);
    void abort();
    void fail(int error);
    void release();
    void initialize(GURL url, std::string method, base::Optional<url::Origin> initiatorOrigin, std::map<std::string, std::string> headers);
    void readyRead();

    // IO thread owned:
    Client *m_client;
    bool m_started;

    // UI thread owned:
    std::string m_scheme;
    URLRequestCustomJobDelegate *m_delegate;
    QPointer<ProfileAdapter> m_profileAdapter;
    scoped_refptr<base::SequencedTaskRunner> m_ioTaskRunner;
};

} // namespace QtWebEngineCore

#endif // URL_REQUEST_CUSTOM_JOB_PROXY_H_