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/****************************************************************************
**
** Copyright (C) 2016 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 QHTTP2PROTOCOLHANDLER_P_H
#define QHTTP2PROTOCOLHANDLER_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 Access API. This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//
#include <private/qhttpnetworkconnectionchannel_p.h>
#include <private/qabstractprotocolhandler_p.h>
#include <private/qhttpnetworkrequest_p.h>
#if !defined(QT_NO_HTTP)
#include <private/http2protocol_p.h>
#include <private/http2streams_p.h>
#include <private/http2frames_p.h>
#include <private/hpacktable_p.h>
#include <private/hpack_p.h>
#include <QtCore/qnamespace.h>
#include <QtCore/qbytearray.h>
#include <QtCore/qglobal.h>
#include <QtCore/qobject.h>
#include <QtCore/qflags.h>
#include <QtCore/qhash.h>
#include <vector>
#include <limits>
#include <deque>
#include <set>
QT_BEGIN_NAMESPACE
class QHttp2ProtocolHandler : public QObject, public QAbstractProtocolHandler
{
Q_OBJECT
public:
QHttp2ProtocolHandler(QHttpNetworkConnectionChannel *channel);
QHttp2ProtocolHandler(const QHttp2ProtocolHandler &rhs) = delete;
QHttp2ProtocolHandler(QHttp2ProtocolHandler &&rhs) = delete;
QHttp2ProtocolHandler &operator = (const QHttp2ProtocolHandler &rhs) = delete;
QHttp2ProtocolHandler &operator = (QHttp2ProtocolHandler &&rhs) = delete;
private slots:
void _q_uploadDataReadyRead();
void _q_replyDestroyed(QObject* reply);
private:
using Stream = Http2::Stream;
void _q_readyRead() override;
void _q_receiveReply() override;
Q_INVOKABLE bool sendRequest() override;
bool sendClientPreface();
bool sendSETTINGS_ACK();
bool sendHEADERS(Stream &stream);
bool sendDATA(Stream &stream);
Q_INVOKABLE bool sendWINDOW_UPDATE(quint32 streamID, quint32 delta);
bool sendRST_STREAM(quint32 streamID, quint32 errorCoder);
bool sendGOAWAY(quint32 errorCode);
void handleDATA();
void handleHEADERS();
void handlePRIORITY();
void handleRST_STREAM();
void handleSETTINGS();
void handlePUSH_PROMISE();
void handlePING();
void handleGOAWAY();
void handleWINDOW_UPDATE();
void handleCONTINUATION();
void handleContinuedHEADERS();
bool acceptSetting(Http2::Settings identifier, quint32 newValue);
void updateStream(Stream &stream, const HPack::HttpHeader &headers,
Qt::ConnectionType connectionType = Qt::DirectConnection);
void updateStream(Stream &stream, const Http2::Frame &dataFrame,
Qt::ConnectionType connectionType = Qt::DirectConnection);
void finishStream(Stream &stream, Qt::ConnectionType connectionType = Qt::DirectConnection);
// Error code send by a peer (GOAWAY/RST_STREAM):
void finishStreamWithError(Stream &stream, quint32 errorCode);
// Locally encountered error:
void finishStreamWithError(Stream &stream, QNetworkReply::NetworkError error,
const QString &message);
// Stream's lifecycle management:
quint32 createNewStream(const HttpMessagePair &message);
void addToSuspended(Stream &stream);
void markAsReset(quint32 streamID);
quint32 popStreamToResume();
void removeFromSuspended(quint32 streamID);
void deleteActiveStream(quint32 streamID);
bool streamWasReset(quint32 streamID) const;
bool prefaceSent = false;
// In the current implementation we send
// SETTINGS only once, immediately after
// the client's preface 24-byte message.
bool waitingForSettingsACK = false;
static const quint32 maxAcceptableTableSize = 16 * HPack::FieldLookupTable::DefaultSize;
// HTTP/2 4.3: Header compression is stateful. One compression context and
// one decompression context are used for the entire connection.
HPack::Decoder decoder;
HPack::Encoder encoder;
QHash<quint32, Stream> activeStreams;
std::deque<quint32> suspendedStreams[3]; // 3 for priorities: High, Normal, Low.
static const std::deque<quint32>::size_type maxRecycledStreams;
std::deque<quint32> recycledStreams;
// Peer's max frame size.
quint32 maxFrameSize = Http2::maxFrameSize;
Http2::FrameReader frameReader;
Http2::Frame inboundFrame;
Http2::FrameWriter frameWriter;
// Temporary storage to assemble HEADERS' block
// from several CONTINUATION frames ...
bool continuationExpected = false;
std::vector<Http2::Frame> continuedFrames;
// Peer's max number of streams ...
quint32 maxConcurrentStreams = Http2::maxConcurrentStreams;
// Control flow:
static const qint32 sessionMaxRecvWindowSize = Http2::defaultSessionWindowSize * 10;
// Signed integer, it can become negative (it's still a valid window size):
qint32 sessionRecvWindowSize = sessionMaxRecvWindowSize;
// We do not negotiate this window size
// We have to send WINDOW_UPDATE frames to our peer also.
static const qint32 streamInitialRecvWindowSize = Http2::defaultSessionWindowSize;
// Updated by SETTINGS and WINDOW_UPDATE.
qint32 sessionSendWindowSize = Http2::defaultSessionWindowSize;
qint32 streamInitialSendWindowSize = Http2::defaultSessionWindowSize;
// It's unlimited by default, but can be changed via SETTINGS.
quint32 maxHeaderListSize = (std::numeric_limits<quint32>::max)();
Q_INVOKABLE void resumeSuspendedStreams();
// Our stream IDs (all odd), the first valid will be 1.
quint32 nextID = 1;
quint32 allocateStreamID();
bool validPeerStreamID() const;
bool goingAway = false;
bool pushPromiseEnabled = false;
quint32 lastPromisedID = Http2::connectionStreamID;
QHash<QString, Http2::PushPromise> promisedData;
bool tryReserveStream(const Http2::Frame &pushPromiseFrame,
const HPack::HttpHeader &requestHeader);
void resetPromisedStream(const Http2::Frame &pushPromiseFrame,
Http2::Http2Error reason);
void initReplyFromPushPromise(const HttpMessagePair &message,
const QString &cacheKey);
// Errors:
void connectionError(Http2::Http2Error errorCode,
const char *message);
void closeSession();
};
QT_END_NAMESPACE
#endif // !defined(QT_NO_HTTP)
#endif
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