Long live QNetworkInformation

The plugins are meant to indicate what they do support, meaning users of
QNetworkInformation can choose to not care about which plugin is used
and rather just request what they want.

Task-number: QTBUG-86966
Change-Id: Ie130e1791250ec2a4470e3ba7081d982654af06c
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
This commit is contained in:
Mårten Nordheim 2020-12-18 15:35:20 +01:00
parent 7e7dacc109
commit 0875626e22
7 changed files with 922 additions and 1 deletions

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@ -5,7 +5,7 @@
#####################################################################
qt_internal_add_module(Network
PLUGIN_TYPES networkaccessbackends
PLUGIN_TYPES networkaccessbackends networkinformationbackends
SOURCES
access/qabstractnetworkcache.cpp access/qabstractnetworkcache.h access/qabstractnetworkcache_p.h
access/qhsts.cpp access/qhsts_p.h
@ -30,6 +30,7 @@ qt_internal_add_module(Network
kernel/qhostinfo.cpp kernel/qhostinfo.h kernel/qhostinfo_p.h
kernel/qnetconmonitor_p.h
kernel/qnetworkdatagram.cpp kernel/qnetworkdatagram.h kernel/qnetworkdatagram_p.h
kernel/qnetworkinformation.cpp kernel/qnetworkinformation_p.h kernel/qnetworkinformation.h
kernel/qnetworkinterface.cpp kernel/qnetworkinterface.h kernel/qnetworkinterface_p.h
kernel/qnetworkinterface_unix_p.h
kernel/qnetworkproxy.cpp kernel/qnetworkproxy.h

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@ -0,0 +1,556 @@
/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtNetwork 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
// #define DEBUG_LOADING
#include "qnetworkinformation.h"
#include <QtNetwork/private/qnetworkinformation_p.h>
#include <QtNetwork/qnetworkinformation.h>
#include <QtCore/private/qobject_p.h>
#include <QtCore/qcoreapplication.h>
#include <QtCore/qmutex.h>
#include <QtCore/private/qfactoryloader_p.h>
#include <algorithm>
#include <memory>
#include <mutex>
QT_BEGIN_NAMESPACE
Q_DECLARE_LOGGING_CATEGORY(lcNetInfo)
Q_LOGGING_CATEGORY(lcNetInfo, "qt.network.info");
Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
(QNetworkInformationBackendFactory_iid,
QStringLiteral("/networkinformationbackends")))
struct QStaticNetworkInformationDataHolder
{
QMutex instanceMutex;
std::unique_ptr<QNetworkInformation> instanceHolder;
QList<QNetworkInformationBackendFactory *> factories;
};
Q_GLOBAL_STATIC(QStaticNetworkInformationDataHolder, dataHolder);
class QNetworkInformationPrivate : public QObjectPrivate
{
Q_DECLARE_PUBLIC(QNetworkInformation)
public:
QNetworkInformationPrivate(QNetworkInformationBackend *backend) : backend(backend) { }
static QNetworkInformation *create(QNetworkInformation::Features features);
static QNetworkInformation *create(QStringView name);
static QNetworkInformation *instance()
{
if (!dataHolder())
return nullptr;
QMutexLocker locker(&dataHolder->instanceMutex);
return dataHolder->instanceHolder.get();
}
static QStringList backendNames();
static void addToList(QNetworkInformationBackendFactory *factory);
static void removeFromList(QNetworkInformationBackendFactory *factory);
private:
static bool initializeList();
std::unique_ptr<QNetworkInformationBackend> backend;
bool m_isOnline = true; // cached
};
bool QNetworkInformationPrivate::initializeList()
{
if (!loader())
return false;
if (!dataHolder())
return false;
static QBasicMutex mutex;
QMutexLocker initLocker(&mutex);
#if QT_CONFIG(library)
loader->update();
#endif
// Instantiates the plugins (and registers the factories)
int index = 0;
while (loader->instance(index))
++index;
initLocker.unlock();
// Now sort the list on number of features available (then name)
const auto featuresNameOrder = [](QNetworkInformationBackendFactory *a,
QNetworkInformationBackendFactory *b) {
if (!a || !b)
return a && !b;
auto aFeaturesSupported = qPopulationCount(unsigned(a->featuresSupported()));
auto bFeaturesSupported = qPopulationCount(unsigned(b->featuresSupported()));
return aFeaturesSupported > bFeaturesSupported
|| (aFeaturesSupported == bFeaturesSupported
&& a->name().compare(b->name(), Qt::CaseInsensitive) < 0);
};
QMutexLocker instanceLocker(&dataHolder->instanceMutex);
std::sort(dataHolder->factories.begin(), dataHolder->factories.end(), featuresNameOrder);
return !dataHolder->factories.isEmpty();
}
void QNetworkInformationPrivate::addToList(QNetworkInformationBackendFactory *factory)
{
// @note: factory is in the base class ctor
if (!dataHolder())
return;
QMutexLocker locker(&dataHolder->instanceMutex);
dataHolder->factories.append(factory);
}
void QNetworkInformationPrivate::removeFromList(QNetworkInformationBackendFactory *factory)
{
// @note: factory is in the base class dtor
if (!dataHolder.exists())
return;
QMutexLocker locker(&dataHolder->instanceMutex);
dataHolder->factories.removeAll(factory);
}
QStringList QNetworkInformationPrivate::backendNames()
{
if (!dataHolder())
return {};
if (!initializeList())
return {};
QMutexLocker locker(&dataHolder->instanceMutex);
const QList copy = dataHolder->factories;
locker.unlock();
QStringList result;
result.reserve(copy.size());
for (const auto *factory : copy)
result << factory->name();
return result;
}
QNetworkInformation *QNetworkInformationPrivate::create(QStringView name)
{
if (!dataHolder())
return nullptr;
QMutexLocker locker(&dataHolder->instanceMutex);
#ifdef DEBUG_LOADING
qDebug().nospace() << "create() called with name=\"" << name
<< "\". instanceHolder initialized? " << !!dataHolder->instanceHolder;
#endif
if (dataHolder->instanceHolder)
return dataHolder->instanceHolder.get();
locker.unlock();
if (!initializeList()) {
#ifdef DEBUG_LOADING
qDebug("Failed to initialize list, returning.");
#endif
return nullptr;
}
locker.relock();
QNetworkInformationBackend *backend = nullptr;
if (!name.isEmpty()) {
const auto nameMatches = [name](QNetworkInformationBackendFactory *factory) {
return factory->name().compare(name, Qt::CaseInsensitive) == 0;
};
auto it = std::find_if(dataHolder->factories.cbegin(), dataHolder->factories.cend(),
nameMatches);
if (it == dataHolder->factories.cend()) {
#ifdef DEBUG_LOADING
if (dataHolder->factories.isEmpty()) {
qDebug("No plugins available");
} else {
QString listNames;
listNames.reserve(8 * dataHolder->factories.count());
for (const auto *factory : qAsConst(dataHolder->factories))
listNames += factory->name() + QStringLiteral(", ");
listNames.chop(2);
qDebug().nospace() << "Couldn't find " << name << " in list with names: { "
<< listNames << " }";
}
#endif
return nullptr;
}
#ifdef DEBUG_LOADING
qDebug() << "Creating instance using loader named " << (*it)->name();
#endif
backend = (*it)->create({});
} else {
#ifdef DEBUG_LOADING
qDebug() << "Creating instance using loader named" << dataHolder->factories.front()->name();
#endif
if (!dataHolder->factories.isEmpty())
backend = dataHolder->factories.front()->create({});
}
if (!backend)
return nullptr;
dataHolder->instanceHolder.reset(new QNetworkInformation(backend));
Q_ASSERT(name.isEmpty()
|| dataHolder->instanceHolder->backendName().compare(name, Qt::CaseInsensitive) == 0);
return dataHolder->instanceHolder.get();
}
QNetworkInformation *QNetworkInformationPrivate::create(QNetworkInformation::Features features)
{
if (!dataHolder())
return nullptr;
QMutexLocker locker(&dataHolder->instanceMutex);
#ifdef DEBUG_LOADING
qDebug().nospace() << "create() called with features=\"" << features
<< "\". instanceHolder initialized? " << !!dataHolder->instanceHolder;
#endif
if (dataHolder->instanceHolder)
return dataHolder->instanceHolder.get();
if (features == 0)
return nullptr;
locker.unlock();
if (!initializeList()) {
#ifdef DEBUG_LOADING
qDebug("Failed to initialize list, returning.");
#endif
return nullptr;
}
locker.relock();
const auto supportsRequestedFeatures = [features](QNetworkInformationBackendFactory *factory) {
return factory && (factory->featuresSupported() & features) == features;
};
for (auto it = dataHolder->factories.cbegin(), end = dataHolder->factories.cend(); it != end;
++it) {
it = std::find_if(it, end, supportsRequestedFeatures);
if (it == end) {
#ifdef DEBUG_LOADING
if (dataHolder->factories.isEmpty()) {
qDebug("No plugins available");
} else {
QStringList names;
names.reserve(dataHolder->factories.count());
for (const auto *factory : qAsConst(dataHolder->factories))
names += factory->name();
qDebug() << "None of the following backends has all the requested features:"
<< names << features;
}
#endif
break;
}
#ifdef DEBUG_LOADING
qDebug() << "Creating instance using loader named" << (*it)->name();
#endif
if (QNetworkInformationBackend *backend = (*it)->create(features)) {
dataHolder->instanceHolder.reset(new QNetworkInformation(backend));
Q_ASSERT(dataHolder->instanceHolder->supports(features));
return dataHolder->instanceHolder.get();
}
#ifdef DEBUG_LOADING
else {
qDebug() << "The factory returned a nullptr";
}
#endif
}
#ifdef DEBUG_LOADING
qDebug() << "Couldn't find/create an appropriate backend.";
#endif
return nullptr;
}
/*!
\class QNetworkInformationBackend
\internal (Semi-private)
\brief QNetworkInformationBackend provides the interface with
which QNetworkInformation does all of its actual work.
Deriving from and implementing this class makes it a candidate
for use with QNetworkInformation. The derived class must, on
updates, call setters in the QNetworkInformationBackend which
will update the values and emit signals if the value has changed.
\sa QNetworkInformationBackendFactory
*/
/*!
\internal
Destroys base backend class.
*/
QNetworkInformationBackend::~QNetworkInformationBackend() = default;
/*!
\fn QNetworkInformationBackend::name()
Backend name, return the same in
QNetworkInformationBackendFactory::name().
*/
/*!
\fn QNetworkInformation::Features QNetworkInformationBackend::featuresSupported()
Features supported, return the same in
QNetworkInformationBackendFactory::featuresSupported().
*/
/*!
\fn void QNetworkInformationBackend::reachabilityChanged()
You should not emit this signal manually, call setReachability()
instead which will emit this signal when the value changes.
\sa setReachability
*/
/*!
\fn void QNetworkInformationBackend::setReachability(QNetworkInformation::Reachability reachability)
Call this when reachability has changed. It will automatically
emit reachabilityChanged().
\sa setReachability
*/
/*!
\class QNetworkInformationBackendFactory
\internal (Semi-private)
\brief QNetworkInformationBackendFactory provides the interface
for creating instances of QNetworkInformationBackend.
Deriving from and implementing this class will let you register
your plugin with QNetworkInformation. It must provide some basic
information for querying information about the backend, and must
also create the backend if requested. If some pre-conditions for
the backend is not met it must return \nullptr.
*/
/*!
\internal
Adds the factory to an internal list.
*/
QNetworkInformationBackendFactory::QNetworkInformationBackendFactory()
{
QNetworkInformationPrivate::addToList(this);
}
/*!
\internal
Removes the factory from an internal list.
*/
QNetworkInformationBackendFactory::~QNetworkInformationBackendFactory()
{
QNetworkInformationPrivate::removeFromList(this);
}
/*!
\fn QString QNetworkInformationBackendFactory::name()
Backend name, return the same in
QNetworkInformationBackend::name().
*/
/*!
\fn QNetworkInformation::Features QNetworkInformationBackendFactory::featuresSupported()
Features supported, return the same in
QNetworkInformationBackend::featuresSupported().
The factory should not promise support for features that wouldn't
be available after creating the backend.
*/
/*!
\fn QNetworkInformationBackend *QNetworkInformationBackendFactory::create()
Create and return an instance of QNetworkInformationBackend. It
will be deallocated by QNetworkInformation on shutdown. If some
precondition is not met, meaning the backend would not function
correctly, then you must return \nullptr.
*/
/*!
\class QNetworkInformation
\since 6.1
\brief QNetworkInformation exposes various network information
through native backends.
QNetworkInformation provides a cross-platform interface to
network-related information through plugins.
Various plugins can have various functionality supported, and so
you can load() plugins based on which features are needed.
QNetworkInformation is a singleton and stays alive from the first
successful load() until application shutdown.
\sa QNetworkInformation::Feature
*/
/*!
\enum QNetworkInformation::Feature
Lists all of the features that a plugin may currently support.
This can be used in QNetworkInformation::load().
\value Reachability
If the plugin supports this feature then
the \c reachability property will be available.
See also QNetworkInformation::Reachability.
*/
/*!
\enum QNetworkInformation::Reachability
\value Unknown
If this value is returned then we may be connected but the OS
has still not confirmed full connectivity, or this features
is not supported.
\value Disconnected
Indicates that the system may have no connectivity at all.
\value Local
Indicates that the system is connected to a network, but it
might only be able to access devices on the local network.
\value Site
Indicates that the system is connected to a network, but it
might only be able to access devices on the local subnet or an
intranet.
\value Online
Indicates that the system is connected to a network and
able to access the Internet.
\sa QNetworkInformation::reachability
*/
/*!
\internal ctor
*/
QNetworkInformation::QNetworkInformation(QNetworkInformationBackend *backend)
: QObject(*(new QNetworkInformationPrivate(backend)))
{
connect(backend, &QNetworkInformationBackend::reachabilityChanged, this,
[this]() { emit reachabilityChanged(d_func()->backend->m_reachability); });
}
/*!
\internal dtor
*/
QNetworkInformation::~QNetworkInformation() = default;
/*!
\property QNetworkInformation::reachability
\brief The current state of the system's network connectivity.
Indicates the level of connectivity that can be expected. Do note
that this is only based on what the plugin/operating system
reports. In certain scenarios this is known to be wrong. For
example, on Windows the 'Online' check, by default, is performed
by Windows connecting to a Microsoft-owned server. If this server
is for any reason blocked then it will assume it does not have
Online reachability. Because of this you should not use this as a
pre-check before attempting to make a connection.
*/
QNetworkInformation::Reachability QNetworkInformation::reachability() const
{
return d_func()->backend->m_reachability;
}
/*!
Returns the name of the currently loaded backend.
*/
QString QNetworkInformation::backendName() const
{
return d_func()->backend->name();
}
/*!
Returns \c true if the currently loaded backend supports
\a features.
*/
bool QNetworkInformation::supports(Features features) const
{
return (d_func()->backend->featuresSupported() & features) == features;
}
/*!
Attempts to load a backend whose name matches \a backend
(case insensitively).
Returns \c true if it managed to load the requested backend or
if it was already loaded. Returns \c false otherwise
\sa instance
*/
bool QNetworkInformation::load(QStringView backend)
{
auto loadedBackend = QNetworkInformationPrivate::create(backend);
return loadedBackend && loadedBackend->backendName() == backend;
}
/*!
Load a backend which supports \a features.
Returns \c true if it managed to load the requested backend or
if it was already loaded. Returns \c false otherwise
\sa instance
*/
bool QNetworkInformation::load(Features features)
{
auto loadedBackend = QNetworkInformationPrivate::create(features);
return loadedBackend && loadedBackend->supports(features);
}
/*!
Returns a list of the names of all currently available backends.
*/
QStringList QNetworkInformation::availableBackends()
{
return QNetworkInformationPrivate::backendNames();
}
/*!
Returns a pointer to the instance of the QNetworkInformation,
if any.
\sa load()
*/
QNetworkInformation *QNetworkInformation::instance()
{
return QNetworkInformationPrivate::instance();
}
QT_END_NAMESPACE

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@ -0,0 +1,96 @@
/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtNetwork 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 QNETWORKINFORMATION_H
#define QNETWORKINFORMATION_H
#include <QtNetwork/qtnetworkglobal.h>
#include <QtCore/qobject.h>
#include <QtCore/qstringview.h>
#include <QtCore/qstringlist.h>
QT_BEGIN_NAMESPACE
class QNetworkInformationBackend;
class QNetworkInformationPrivate;
class Q_NETWORK_EXPORT QNetworkInformation : public QObject
{
Q_OBJECT
Q_DECLARE_PRIVATE(QNetworkInformation)
Q_PROPERTY(Reachability reachability READ reachability)
public:
enum class Reachability {
Unknown,
Disconnected,
Local,
Site,
Online,
};
Q_ENUM(Reachability)
enum class Feature {
Reachability = 0x1,
};
Q_ENUM(Feature)
Q_DECLARE_FLAGS(Features, Feature)
~QNetworkInformation();
Reachability reachability() const;
QString backendName() const;
virtual bool supports(Features features) const;
static bool load(QStringView backend = {});
static bool load(Features features);
static QStringList availableBackends();
static QNetworkInformation *instance();
Q_SIGNALS:
void reachabilityChanged(Reachability newReachability);
private:
friend class QNetworkInformationPrivate;
QNetworkInformation(QNetworkInformationBackend *backend);
};
QT_END_NAMESPACE
#endif

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@ -0,0 +1,105 @@
/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtNetwork 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 QNETWORKINFORMATION_P_H
#define QNETWORKINFORMATION_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of the Network Information API. This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//
#include <QtNetwork/private/qtnetworkglobal_p.h>
#include <QtNetwork/qnetworkinformation.h>
#include <QtCore/qloggingcategory.h>
QT_BEGIN_NAMESPACE
class Q_NETWORK_EXPORT QNetworkInformationBackend : public QObject
{
Q_OBJECT
public:
virtual ~QNetworkInformationBackend();
virtual QString name() const = 0;
virtual QNetworkInformation::Features featuresSupported() const = 0;
Q_SIGNALS:
void reachabilityChanged();
protected:
void setReachability(QNetworkInformation::Reachability reachability)
{
if (m_reachability != reachability) {
m_reachability = reachability;
emit reachabilityChanged();
}
}
private:
QNetworkInformation::Reachability m_reachability = QNetworkInformation::Reachability::Unknown;
friend class QNetworkInformation;
friend class QNetworkInformationPrivate;
};
class Q_NETWORK_EXPORT QNetworkInformationBackendFactory : public QObject
{
Q_OBJECT
public:
QNetworkInformationBackendFactory();
virtual ~QNetworkInformationBackendFactory();
virtual QString name() const = 0;
virtual QNetworkInformationBackend *create(QNetworkInformation::Features requiredFeatures) const = 0;
virtual QNetworkInformation::Features featuresSupported() const = 0;
};
#define QNetworkInformationBackendFactory_iid "org.qt-project.Qt.NetworkInformationBackendFactory"
Q_DECLARE_INTERFACE(QNetworkInformationBackendFactory, QNetworkInformationBackendFactory_iid);
QT_END_NAMESPACE
#endif

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@ -13,4 +13,5 @@ if(QT_FEATURE_private_tests AND NOT MACOS)
endif()
if(QT_FEATURE_private_tests)
add_subdirectory(qauthenticator)
add_subdirectory(qnetworkinformation)
endif()

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@ -0,0 +1,6 @@
qt_internal_add_test(tst_qnetworkinformation
SOURCES
tst_qnetworkinformation.cpp
PUBLIC_LIBRARIES
Qt::NetworkPrivate
)

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@ -0,0 +1,156 @@
/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** 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 <QtNetwork/private/qnetworkinformation_p.h>
#include <QtNetwork/qnetworkinformation.h>
#include <QtTest/qtest.h>
#include <limits>
#include <memory>
class MockFactory;
class tst_QNetworkInformation : public QObject
{
Q_OBJECT
private slots:
void initTestCase();
void reachability();
void cleanupTestCase();
private:
std::unique_ptr<MockFactory> mockFactory;
};
static const QString mockName = QStringLiteral("mock");
class MockBackend : public QNetworkInformationBackend
{
Q_OBJECT
public:
MockBackend()
{
Q_ASSERT(!instance);
instance = this;
setReachability(QNetworkInformation::Reachability::Online);
}
~MockBackend() { instance = nullptr; }
QString name() const override { return mockName; }
QNetworkInformation::Features featuresSupported() const override
{
return featuresSupportedStatic();
}
static void setNewReachability(QNetworkInformation::Reachability value)
{
Q_ASSERT(instance);
instance->setReachability(value);
}
static QNetworkInformation::Features featuresSupportedStatic()
{
return { QNetworkInformation::Feature::Reachability };
}
private:
static inline MockBackend *instance = nullptr;
};
class MockFactory : public QNetworkInformationBackendFactory
{
Q_OBJECT
public:
QString name() const override { return mockName; }
QNetworkInformationBackend *
create(QNetworkInformation::Features requiredFeatures) const override
{
if ((requiredFeatures & featuresSupported()) != requiredFeatures)
return nullptr;
return new MockBackend();
}
QNetworkInformation::Features featuresSupported() const override
{
return MockBackend::featuresSupportedStatic();
}
};
void tst_QNetworkInformation::initTestCase()
{
auto prevBackends = QNetworkInformation::availableBackends();
qDebug() << "available backends:" << prevBackends;
// Creating the factory registers it as a backend
mockFactory = std::make_unique<MockFactory>();
auto backends = QNetworkInformation::availableBackends();
QVERIFY(backends.size() > prevBackends.size());
QVERIFY(backends.contains(u"mock"));
QVERIFY(QNetworkInformation::load(u"mock"));
QVERIFY(QNetworkInformation::load(u"mock"));
QVERIFY(!QNetworkInformation::load(u"mocks"));
}
void tst_QNetworkInformation::cleanupTestCase()
{
// Make sure the factory gets unregistered on destruction:
mockFactory.reset();
auto backends = QNetworkInformation::availableBackends();
QVERIFY(!backends.contains(u"mock"));
}
void tst_QNetworkInformation::reachability()
{
auto info = QNetworkInformation::instance();
QNetworkInformation::Reachability boundIsOnline = QNetworkInformation::Reachability::Unknown;
bool signalEmitted = false;
connect(info, &QNetworkInformation::reachabilityChanged, this, [&, info]() {
signalEmitted = true;
boundIsOnline = info->reachability();
});
QCOMPARE(info->reachability(), QNetworkInformation::Reachability::Online);
MockBackend::setNewReachability(QNetworkInformation::Reachability::Disconnected);
QCoreApplication::processEvents();
QVERIFY(signalEmitted);
QCOMPARE(info->reachability(), QNetworkInformation::Reachability::Disconnected);
QCOMPARE(boundIsOnline, QNetworkInformation::Reachability::Disconnected);
// Set the same value again, signal should not be emitted again
signalEmitted = false;
MockBackend::setNewReachability(QNetworkInformation::Reachability::Disconnected);
QCoreApplication::processEvents();
QVERIFY(!signalEmitted);
MockBackend::setNewReachability(QNetworkInformation::Reachability::Local);
QCOMPARE(info->reachability(), QNetworkInformation::Reachability::Local);
QCOMPARE(boundIsOnline, QNetworkInformation::Reachability::Local);
MockBackend::setNewReachability(QNetworkInformation::Reachability::Site);
QCOMPARE(info->reachability(), QNetworkInformation::Reachability::Site);
QCOMPARE(boundIsOnline, QNetworkInformation::Reachability::Site);
}
QTEST_MAIN(tst_QNetworkInformation);
#include "tst_qnetworkinformation.moc"