/**************************************************************************** ** ** 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 #include #include #if !defined(QT_NO_HTTP) #include "http2/http2protocol_p.h" #include "http2/http2streams_p.h" #include "http2/http2frames_p.h" #include "http2/hpacktable_p.h" #include "http2/hpack_p.h" #include #include #include #include #include #include #include #include #include #include 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 activeStreams; std::deque suspendedStreams[3]; // 3 for priorities: High, Normal, Low. static const std::deque::size_type maxRecycledStreams; std::deque 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 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::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 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