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/****************************************************************************
**
** Copyright (C) 2020 Mikhail Svetkin <mikhail.svetkin@gmail.com>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtHttpServer module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) 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.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-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qhttpserverfutureresponse.h"
#include <QtCore/qfuture.h>
#include <QtCore/qfuturewatcher.h>
#include <QtNetwork/qtcpsocket.h>
#include <QtHttpServer/qhttpserverresponder.h>
#include <private/qhttpserverresponse_p.h>
QT_BEGIN_NAMESPACE
/*!
\class QHttpServerFutureResponse
\brief QHttpServerFutureResponse is a simplified API for asynchronous responses.
\code
QHttpServer server;
server.route("/feature/", [] (int id) -> QHttpServerFutureResponse {
auto future = QtConcurrent::run([] () {
return QHttpServerResponse("the future is coming");
});
return future;
});
server.listen();
\endcode
*/
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
QHttpServerResponse QFutureInterface<QHttpServerResponse>::takeResult()
{
if (isCanceled()) {
exceptionStore().throwPossibleException();
return QHttpServerResponse::StatusCode::NotFound;
}
// Note: we wait for all, this is intentional,
// not to mess with other unready results.
waitForResult(-1);
#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
std::lock_guard<QMutex> locker{*mutex()};
#else
std::lock_guard<QMutex> locker{mutex(0)};
#endif
QtPrivate::ResultIteratorBase position = resultStoreBase().resultAt(0);
auto ret = std::move_if_noexcept(
*const_cast<QHttpServerResponse *>(position.pointer<QHttpServerResponse>()));
resultStoreBase().template clear<QHttpServerResponse>();
return ret;
}
#endif // QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
struct QResponseWatcher : public QFutureWatcher<QHttpServerResponse>
{
Q_OBJECT
public:
QResponseWatcher(QHttpServerResponder &&_responder)
: QFutureWatcher<QHttpServerResponse>(),
responder(std::move(_responder)) {
}
QHttpServerResponder responder;
};
class QHttpServerFutureResponsePrivate : public QHttpServerResponsePrivate
{
public:
QHttpServerFutureResponsePrivate(const QFuture<QHttpServerResponse> &futureResponse)
: QHttpServerResponsePrivate(),
futureResp(futureResponse)
{
}
QFuture<QHttpServerResponse> futureResp;
};
/*!
Constructs a new QHttpServerFutureResponse with the \a future response.
*/
QHttpServerFutureResponse::QHttpServerFutureResponse(const QFuture<QHttpServerResponse> &futureResp)
: QHttpServerFutureResponse(new QHttpServerFutureResponsePrivate{futureResp})
{
}
/*!
\internal
*/
QHttpServerFutureResponse::QHttpServerFutureResponse(QHttpServerFutureResponsePrivate *d)
: QHttpServerResponse(d)
{
}
/*!
\reimp
*/
void QHttpServerFutureResponse::write(QHttpServerResponder &&responder) const
{
if (!d_ptr->derived) {
QHttpServerResponse::write(std::move(responder));
return;
}
Q_D(const QHttpServerFutureResponse);
auto socket = responder.socket();
auto futureWatcher = new QResponseWatcher(std::move(responder));
QObject::connect(socket, &QObject::destroyed,
futureWatcher, &QObject::deleteLater);
QObject::connect(futureWatcher, &QFutureWatcherBase::finished,
socket,
[futureWatcher] () mutable {
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
auto resp = futureWatcher->future().d.takeResult();
#else
auto resp = futureWatcher->future().takeResult();
#endif
resp.write(std::move(futureWatcher->responder));
futureWatcher->deleteLater();
});
futureWatcher->setFuture(d->futureResp);
}
QT_END_NAMESPACE
#include "qhttpserverfutureresponse.moc"
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