HTTP2 protocol handler

Add HTTP2 support in QNAM - QHttp2ProtocolHandler + aux. classes.

[ChangeLog][QtNetwork] Added support for HTTP/2 protocol

Task-number: QTBUG-50956
Change-Id: I3a119cfbb1fb3118d9003225f5e54b46ae2829b6
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

1 files changed, 164 insertions, 0 deletions

diff --git a/src/network/access/http2/http2protocol_p.h b/src/network/access/http2/http2protocol_p.h
new file mode 100644
index 0000000000..c7088e2179
--- /dev/null
+++ b/src/network/access/http2/http2protocol_p.h
@@ -0,0 +1,164 @@
+/****************************************************************************
+**
+** 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 HTTP2PROTOCOL_P_H
+#define HTTP2PROTOCOL_P_H
+
+#include <QtNetwork/qnetworkreply.h>
+#include <QtCore/qloggingcategory.h>
+#include <QtCore/qglobal.h>
+
+// Different HTTP/2 constants/values as defined by RFC 7540.
+
+QT_BEGIN_NAMESPACE
+
+class QString;
+
+namespace Http2
+{
+
+enum class Settings : quint16
+{
+    HEADER_TABLE_SIZE_ID = 0x1,
+    ENABLE_PUSH_ID = 0x2,
+    MAX_CONCURRENT_STREAMS_ID = 0x3,
+    INITIAL_WINDOW_SIZE_ID = 0x4,
+    MAX_FRAME_SIZE_ID = 0x5,
+    MAX_HEADER_LIST_SIZE_ID = 0x6
+};
+
+enum class FrameType : uchar
+{
+    DATA = 0x0,
+    HEADERS = 0x1,
+    PRIORITY = 0x2,
+    RST_STREAM = 0x3,
+    SETTINGS = 0x4,
+    PUSH_PROMISE = 0x5,
+    PING = 0x6,
+    GOAWAY = 0x7,
+    WINDOW_UPDATE = 0x8,
+    CONTINUATION = 0x9,
+    // ATTENTION: enumerators must be sorted.
+    // We use LAST_FRAME_TYPE to check if
+    // frame type is known, if not - this frame
+    // must be ignored, HTTP/2 5.1).
+    LAST_FRAME_TYPE
+};
+
+enum class FrameFlag : uchar
+{
+    EMPTY = 0x0, // Valid for any frame type.
+    ACK = 0x1, // Valid for PING, SETTINGS
+    END_STREAM = 0x1, // Valid for HEADERS, DATA
+    END_HEADERS = 0x4, // Valid for PUSH_PROMISE, HEADERS,
+    PADDED = 0x8, // Valid for PUSH_PROMISE, HEADERS, DATA
+    PRIORITY = 0x20 // Valid for HEADERS,
+};
+
+Q_DECLARE_FLAGS(FrameFlags, FrameFlag)
+Q_DECLARE_OPERATORS_FOR_FLAGS(FrameFlags)
+
+enum Http2PredefinedParameters
+{
+    // Old-style enum, so we
+    // can use as Http2::frameHeaderSize for example.
+    clientPrefaceLength = 24, // HTTP/2, 3.5
+    connectionStreamID = 0, // HTTP/2, 5.1.1
+    frameHeaderSize = 9, // HTTP/2, 4.1
+
+    // It's our max frame size we send in SETTINGS frame,
+    // it's also the default one and we also use it to later
+    // validate incoming frames:
+    maxFrameSize = 16384, // HTTP/2 6.5.2
+
+    defaultSessionWindowSize = 65535, // HTTP/2 6.5.2
+    maxPayloadSize = (1 << 24) - 1, // HTTP/2 6.5.2
+    // Using 1000 (rather arbitrarily), just to
+    // impose *some* upper limit:
+    maxPeerConcurrentStreams  = 1000,
+    maxConcurrentStreams = 100 // HTTP/2, 6.5.2
+};
+
+extern const Q_AUTOTEST_EXPORT char Http2clientPreface[clientPrefaceLength];
+
+enum class FrameStatus
+{
+    protocolError,
+    sizeError,
+    incompleteFrame,
+    goodFrame
+};
+
+enum Http2Error
+{
+    // Old-style enum to avoid excessive name
+    // qualification ...
+    // NB:
+    // I use the last enumerator to check
+    // that errorCode (quint32) is valid,
+    // so it needs to be the highest-numbered!
+    // HTTP/2 7:
+    HTTP2_NO_ERROR = 0x0,
+    PROTOCOL_ERROR = 0x1,
+    INTERNAL_ERROR = 0x2,
+    FLOW_CONTROL_ERROR = 0x3,
+    SETTINGS_TIMEOUT = 0x4,
+    STREAM_CLOSED = 0x5,
+    FRAME_SIZE_ERROR = 0x6,
+    REFUSE_STREAM = 0x7,
+    CANCEL = 0x8,
+    COMPRESSION_ERROR = 0x9,
+    CONNECT_ERROR = 0xa,
+    ENHANCE_YOUR_CALM = 0xb,
+    INADEQUATE_SECURITY = 0xc,
+    HTTP_1_1_REQUIRED = 0xd
+};
+
+void qt_error(quint32 errorCode, QNetworkReply::NetworkError &error, QString &errorString);
+QString qt_error_string(quint32 errorCode);
+QNetworkReply::NetworkError qt_error(quint32 errorCode);
+
+}
+
+Q_DECLARE_LOGGING_CATEGORY(QT_HTTP2)
+
+QT_END_NAMESPACE
+
+#endif