diff options
Diffstat (limited to 'src/network/access/qspdyprotocolhandler.cpp')
| -rw-r--r-- | src/network/access/qspdyprotocolhandler.cpp | 1286 |
1 files changed, 1286 insertions, 0 deletions
diff --git a/src/network/access/qspdyprotocolhandler.cpp b/src/network/access/qspdyprotocolhandler.cpp new file mode 100644 index 0000000000..098b3e9ab0 --- /dev/null +++ b/src/network/access/qspdyprotocolhandler.cpp @@ -0,0 +1,1286 @@ +/**************************************************************************** +** +** Copyright (C) 2014 BlackBerry Limited. All rights reserved. +** Contact: http://www.qt-project.org/legal +** +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <private/qspdyprotocolhandler_p.h> +#include <private/qnoncontiguousbytedevice_p.h> +#include <private/qhttpnetworkconnectionchannel_p.h> +#include <QtCore/QtEndian> + +#if !defined(QT_NO_HTTP) && !defined(QT_NO_SSL) + +QT_BEGIN_NAMESPACE + +static const char spdyDictionary[] = { + 0x00, 0x00, 0x00, 0x07, 0x6f, 0x70, 0x74, 0x69, // ....opti + 0x6f, 0x6e, 0x73, 0x00, 0x00, 0x00, 0x04, 0x68, // ons....h + 0x65, 0x61, 0x64, 0x00, 0x00, 0x00, 0x04, 0x70, // ead....p + 0x6f, 0x73, 0x74, 0x00, 0x00, 0x00, 0x03, 0x70, // ost....p + 0x75, 0x74, 0x00, 0x00, 0x00, 0x06, 0x64, 0x65, // ut....de + 0x6c, 0x65, 0x74, 0x65, 0x00, 0x00, 0x00, 0x05, // lete.... + 0x74, 0x72, 0x61, 0x63, 0x65, 0x00, 0x00, 0x00, // 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+ 0x69, 0x63, 0x70, 0x72, 0x69, 0x76, 0x61, 0x74, // icprivat + 0x65, 0x6d, 0x61, 0x78, 0x2d, 0x61, 0x67, 0x65, // emax-age + 0x3d, 0x67, 0x7a, 0x69, 0x70, 0x2c, 0x64, 0x65, // .gzip.de + 0x66, 0x6c, 0x61, 0x74, 0x65, 0x2c, 0x73, 0x64, // flate.sd + 0x63, 0x68, 0x63, 0x68, 0x61, 0x72, 0x73, 0x65, // chcharse + 0x74, 0x3d, 0x75, 0x74, 0x66, 0x2d, 0x38, 0x63, // t.utf-8c + 0x68, 0x61, 0x72, 0x73, 0x65, 0x74, 0x3d, 0x69, // harset.i + 0x73, 0x6f, 0x2d, 0x38, 0x38, 0x35, 0x39, 0x2d, // so-8859- + 0x31, 0x2c, 0x75, 0x74, 0x66, 0x2d, 0x2c, 0x2a, // 1.utf-.. + 0x2c, 0x65, 0x6e, 0x71, 0x3d, 0x30, 0x2e // .enq.0. +}; + +// uncomment to debug +//static void printHex(const QByteArray &ba) +//{ +// QByteArray hex; +// QByteArray clearText; +// for (int a = 0; a < ba.count(); ++a) { +// QByteArray currentHexChar = QByteArray(1, ba.at(a)).toHex().rightJustified(2, ' '); +// QByteArray currentChar; +// if (ba.at(a) >= 32 && ba.at(a) < 126) { // if ASCII, print the letter +// currentChar = QByteArray(1, ba.at(a)); +// } else { +// currentChar = " "; +// } +// clearText.append(currentChar.rightJustified(2, ' ')); +// hex.append(currentHexChar); +// hex.append(' '); +// clearText.append(' '); +// } +// int chunkSize = 102; // 12 == 4 bytes per line +// for (int a = 0; a < hex.count(); a += chunkSize) { +// qDebug() << hex.mid(a, chunkSize); +// qDebug() << clearText.mid(a, chunkSize); +// } +//} + +QSpdyProtocolHandler::QSpdyProtocolHandler(QHttpNetworkConnectionChannel *channel) + : QObject(0), QAbstractProtocolHandler(channel), + m_nextStreamID(-1), + m_maxConcurrentStreams(100), // 100 is recommended in the SPDY RFC + m_initialWindowSize(0), + m_waitingForCompleteStream(false) +{ + m_inflateStream.zalloc = Z_NULL; + m_inflateStream.zfree = Z_NULL; + m_inflateStream.opaque = Z_NULL; + int zlibRet = inflateInit(&m_inflateStream); + Q_ASSERT(zlibRet == Z_OK); + + m_deflateStream.zalloc = Z_NULL; + m_deflateStream.zfree = Z_NULL; + m_deflateStream.opaque = Z_NULL; + + // Do actually not compress (i.e. compression level = 0) + // when sending the headers because of the CRIME attack + zlibRet = deflateInit(&m_deflateStream, /* compression level = */ 0); + Q_ASSERT(zlibRet == Z_OK); +} + +QSpdyProtocolHandler::~QSpdyProtocolHandler() +{ + deflateEnd(&m_deflateStream); + deflateEnd(&m_inflateStream); +} + +bool QSpdyProtocolHandler::sendRequest() +{ + Q_ASSERT(!m_reply); + + int maxPossibleRequests = m_maxConcurrentStreams - m_inFlightStreams.count(); + Q_ASSERT(maxPossibleRequests >= 0); + if (maxPossibleRequests == 0) + return true; // return early if max concurrent requests are exceeded + + m_channel->state = QHttpNetworkConnectionChannel::WritingState; + + // requests will be ordered by priority (see QMultiMap doc) + QList<HttpMessagePair> requests = m_channel->spdyRequestsToSend.values(); + QList<int> priorities = m_channel->spdyRequestsToSend.keys(); + + int requestsToSend = qMin(requests.count(), maxPossibleRequests); + + for (int a = 0; a < requestsToSend; ++a) { + HttpMessagePair currentPair = requests.at(a); + QHttpNetworkRequest currentRequest = requests.at(a).first; + QHttpNetworkReply *currentReply = requests.at(a).second; + + currentReply->setSpdyWasUsed(true); + qint32 streamID = generateNextStreamID(); + + currentReply->setRequest(currentRequest); + currentReply->d_func()->connection = m_connection; + currentReply->d_func()->connectionChannel = m_channel; + m_inFlightStreams.insert(streamID, currentPair); + + sendSYN_STREAM(currentPair, streamID, /* associatedToStreamID = */ 0); + int requestsRemoved = m_channel->spdyRequestsToSend.remove( + priorities.at(a), currentPair); + Q_ASSERT(requestsRemoved == 1); + Q_UNUSED(requestsRemoved); // silence -Wunused-variable + } + m_channel->state = QHttpNetworkConnectionChannel::IdleState; + return true; +} + +void QSpdyProtocolHandler::_q_receiveReply() +{ + Q_ASSERT(m_socket); + + // only run when the QHttpNetworkConnection is not currently being destructed, e.g. + // this function is called from _q_disconnected which is called because + // of ~QHttpNetworkConnectionPrivate + if (!qobject_cast<QHttpNetworkConnection*>(m_connection)) { + return; + } + + if (bytesAvailable() < 8) + return; // cannot read frame headers, wait for more data + + char frameHeadersRaw[8]; + if (!readNextChunk(8, frameHeadersRaw)) + return; // this should not happen, we just checked + + const QByteArray frameHeaders(frameHeadersRaw, 8); // ### try without memcpy + if (frameHeadersRaw[0] & 0x80) { + handleControlFrame(frameHeaders); + } else { + handleDataFrame(frameHeaders); + } + + // after handling the current frame, check whether there is more data waiting + if (m_socket->bytesAvailable() > 0) + QMetaObject::invokeMethod(m_channel, "_q_receiveReply", Qt::QueuedConnection); +} + +void QSpdyProtocolHandler::_q_readyRead() +{ + _q_receiveReply(); +} + +static qint16 twoBytesToInt(const char *bytes) +{ + return qFromBigEndian<qint16>(reinterpret_cast<const uchar *>(bytes)); +} + +static qint32 threeBytesToInt(const char *bytes) +{ + return qFromBigEndian<qint32>(reinterpret_cast<const uchar *>(bytes)) >> 8; +} + +static qint32 fourBytesToInt(const char *bytes) +{ + return qFromBigEndian<qint32>(reinterpret_cast<const uchar *>(bytes)); +} + +static void appendIntToThreeBytes(char *output, qint32 number) +{ + qToBigEndian<qint16>(number, reinterpret_cast<uchar *>(output + 1)); + qToBigEndian<qint8>(number >> 16, reinterpret_cast<uchar *>(output)); +} + +static void appendIntToFourBytes(char *output, qint32 number) +{ + qToBigEndian<qint32>(number, reinterpret_cast<uchar *>(output)); +} + +static QByteArray intToFourBytes(qint32 number) // ### try to use appendIntToFourBytes where possible +{ + uchar data[4]; + qToBigEndian<qint32>(number, data); + QByteArray ret(reinterpret_cast<char *>(data), 4); + return ret; +} + +static QByteArray intToThreeBytes(qint32 number) +{ + uchar data[4]; + qToBigEndian<qint32>(number << 8, data); + QByteArray ret(reinterpret_cast<char *>(data), 3); + return ret; +} + +static qint32 getStreamID(const char *bytes) +{ + // eliminate most significant bit; it might be 0 or 1 depending on whether + // we are dealing with a control or data frame + return fourBytesToInt(bytes) & 0x3fffffff; +} + +static QByteArray headerField(const QByteArray &name, const QByteArray &value) +{ + QByteArray ret; + ret.reserve(name.count() + value.count() + 8); // 4 byte for length each + ret.append(intToFourBytes(name.count())); + ret.append(name); + ret.append(intToFourBytes(value.count())); + ret.append(value); + return ret; +} + +bool QSpdyProtocolHandler::uncompressHeader(const QByteArray &input, QByteArray *output) +{ + const size_t chunkSize = 1024; + char outputRaw[chunkSize]; + // input bytes will not be changed by zlib, so it is safe to const_cast here + m_inflateStream.next_in = const_cast<Bytef *>(reinterpret_cast<const Bytef *>(input.constData())); + m_inflateStream.avail_in = input.count(); + m_inflateStream.total_in = input.count(); + int zlibRet; + + do { + m_inflateStream.next_out = reinterpret_cast<Bytef *>(outputRaw); + m_inflateStream.avail_out = chunkSize; + zlibRet = inflate(&m_inflateStream, Z_SYNC_FLUSH); + if (zlibRet == Z_NEED_DICT) { + zlibRet = inflateSetDictionary(&m_inflateStream, + reinterpret_cast<const Bytef*>(spdyDictionary), + /* dictionaryLength = */ 1423); + Q_ASSERT(zlibRet == Z_OK); + continue; + } + switch (zlibRet) { + case Z_BUF_ERROR: { + if (m_inflateStream.avail_in == 0) { + int outputSize = chunkSize - m_inflateStream.avail_out; + output->append(outputRaw, outputSize); + m_inflateStream.avail_out = chunkSize; + } + break; + } + case Z_OK: { + int outputSize = chunkSize - m_inflateStream.avail_out; + output->append(outputRaw, outputSize); + break; + } + default: { + qWarning() << Q_FUNC_INFO << "got unexpected zlib return value:" << zlibRet; + return false; + } + } + } while (m_inflateStream.avail_in > 0 && zlibRet != Z_STREAM_END); + + Q_ASSERT(m_inflateStream.avail_in == 0); + return true; +} + +QByteArray QSpdyProtocolHandler::composeHeader(const QHttpNetworkRequest &request) +{ + QByteArray uncompressedHeader; + uncompressedHeader.reserve(300); // rough estimate + + // calculate additional headers first, because we need to know the size + // ### do not partially copy the list, but restrict the set header fields + // in QHttpNetworkConnection + QList<QPair<QByteArray, QByteArray> > additionalHeaders; + for (int a = 0; a < request.header().count(); ++a) { + QByteArray key = request.header().at(a).first; + if (key == "Connection" || key == "Host" || key == "Keep-Alive" + || key == "Proxy-Connection" || key == "Transfer-Encoding") + continue; // those headers are not valid (section 3.2.1) + additionalHeaders.append(request.header().at(a)); + } + + qint32 numberOfHeaderPairs = 5 + additionalHeaders.count(); // 5 mandatory below + the additional ones + uncompressedHeader.append(intToFourBytes(numberOfHeaderPairs)); + + // mandatory header fields: + + uncompressedHeader.append(headerField(":method", request.methodName())); +#ifndef QT_NO_NETWORKPROXY + bool useProxy = m_connection->d_func()->networkProxy.type() != QNetworkProxy::NoProxy; + uncompressedHeader.append(headerField(":path", request.uri(useProxy))); +#else + uncompressedHeader.append(headerField(":path", request.uri(false))); +#endif + uncompressedHeader.append(headerField(":version", "HTTP/1.1")); + + QHostAddress add; // ### unify with the host parsing from QHttpNetworkConnection + QByteArray host; + QString hostName = m_connection->hostName(); + if (add.setAddress(hostName)) { + if (add.protocol() == QAbstractSocket::IPv6Protocol) + host = "[" + hostName.toLatin1() + "]"; //format the ipv6 in the standard way + else + host = hostName.toLatin1(); + + } else { + host = QUrl::toAce(hostName); + } + + int port = request.url().port(); + if (port != -1) { + host += ':'; + host += QByteArray::number(port); + } + uncompressedHeader.append(headerField(":host", host)); + + uncompressedHeader.append(headerField(":scheme", request.url().scheme().toLatin1())); + + // end of mandatory header fields + + // now add the additional headers + for (int a = 0; a < additionalHeaders.count(); ++a) { + uncompressedHeader.append(headerField(additionalHeaders.at(a).first.toLower(), + additionalHeaders.at(a).second)); + } + + m_deflateStream.total_in = uncompressedHeader.count(); + m_deflateStream.avail_in = uncompressedHeader.count(); + m_deflateStream.next_in = reinterpret_cast<unsigned char *>(uncompressedHeader.data()); + int outputBytes = uncompressedHeader.count() + 30; // 30 bytes of compression header overhead + m_deflateStream.avail_out = outputBytes; + unsigned char *out = new unsigned char[outputBytes]; + m_deflateStream.next_out = out; + int availOutBefore = m_deflateStream.avail_out; + int zlibRet = deflate(&m_deflateStream, Z_SYNC_FLUSH); // do everything in one go since we use no compression + int compressedHeaderSize = availOutBefore - m_deflateStream.avail_out; + Q_ASSERT(zlibRet == Z_OK); // otherwise, we need to allocate more outputBytes + Q_UNUSED(zlibRet); // silence -Wunused-variable + Q_ASSERT(m_deflateStream.avail_in == 0); + QByteArray compressedHeader(reinterpret_cast<char *>(out), compressedHeaderSize); + delete[] out; + + return compressedHeader; +} + +quint64 QSpdyProtocolHandler::bytesAvailable() const +{ + Q_ASSERT(m_socket); + return m_spdyBuffer.byteAmount() + m_socket->bytesAvailable(); +} + +bool QSpdyProtocolHandler::readNextChunk(qint64 length, char *sink) +{ + qint64 expectedReadBytes = length; + qint64 requiredBytesFromBuffer = 0; + + if (m_waitingForCompleteStream) { + requiredBytesFromBuffer = qMin(length, m_spdyBuffer.byteAmount()); + // ### if next chunk from buffer bigger than what we want to read, + // we have to call read() (which memcpy's). Otherwise, we can just + // read the next chunk without memcpy'ing. + qint64 bytesReadFromBuffer = m_spdyBuffer.read(sink, requiredBytesFromBuffer); + Q_ASSERT(bytesReadFromBuffer == requiredBytesFromBuffer); + if (length <= bytesReadFromBuffer) { + return true; // buffer > required size -> no need to read from socket + } + expectedReadBytes -= requiredBytesFromBuffer; + } + qint64 readBytes = m_socket->read(sink + requiredBytesFromBuffer, expectedReadBytes); + + if (readBytes < expectedReadBytes) { + m_waitingForCompleteStream = true; + // ### this is inefficient, we should not put back so much data into the buffer + QByteArray temp(sink, requiredBytesFromBuffer + readBytes); + m_spdyBuffer.append(temp); + return false; + } else { + return true; // buffer must be cleared by calling function + } +} + +void QSpdyProtocolHandler::sendControlFrame(FrameType type, + ControlFrameFlags flags, + const char *data, + quint32 length) +{ + // frame type and stream ID + char header[8]; + header[0] = 0x80; // leftmost bit == 1 -> is a control frame + header[1] = 0x03; // 3 bit == version 3 + header[2] = 0; + switch (type) { + case FrameType_CREDENTIAL: { + qWarning("sending SPDY CREDENTIAL frame is not yet implemented"); // QTBUG-36188 + return; + } + default: + header[3] = type; + } + + // flags + header[4] = 0; + if (flags & ControlFrame_FLAG_FIN || length == 0) { + Q_ASSERT(type == FrameType_SYN_STREAM || type == FrameType_SYN_REPLY + || type == FrameType_HEADERS || length == 0); + header[4] |= ControlFrame_FLAG_FIN; + } + if (flags & ControlFrame_FLAG_UNIDIRECTIONAL) { + Q_ASSERT(type == FrameType_SYN_STREAM); + header[4] |= ControlFrame_FLAG_UNIDIRECTIONAL; + } + + // length + appendIntToThreeBytes(header + 5, length); + + qint64 written = m_socket->write(header, 8); + Q_ASSERT(written == 8); + written = m_socket->write(data, length); + Q_ASSERT(written == length); +} + +void QSpdyProtocolHandler::sendSYN_STREAM(HttpMessagePair messagePair, + qint32 streamID, qint32 associatedToStreamID) +{ + QHttpNetworkRequest request = messagePair.first; + QHttpNetworkReply *reply = messagePair.second; + + ControlFrameFlags flags = 0; + + if (!request.uploadByteDevice()) { + // no upload -> this is the last frame, send the FIN flag + flags |= ControlFrame_FLAG_FIN; + reply->d_func()->state = QHttpNetworkReplyPrivate::SPDYHalfClosed; + } else { + reply->d_func()->state = QHttpNetworkReplyPrivate::SPDYUploading; + + // hack: set the stream ID on the device directly, so when we get + // the signal for uploading we know which stream we are sending on + request.uploadByteDevice()->setProperty("SPDYStreamID", streamID); + + QObject::connect(request.uploadByteDevice(), SIGNAL(readyRead()), this, + SLOT(_q_uploadDataReadyRead()), Qt::QueuedConnection); + } + + QByteArray namesAndValues = composeHeader(request); + quint32 length = namesAndValues.count() + 10; // 10 == 4 for Stream-ID + 4 for Associated-To-Stream-ID + // + 2 for Priority, Unused and Slot + + QByteArray wireData; + wireData.reserve(length); + wireData.append(intToFourBytes(streamID)); + wireData.append(intToFourBytes(associatedToStreamID)); + + // priority (3 bits) / unused (5 bits) / slot (8 bits) + char prioAndSlot[2]; + switch (request.priority()) { + case QHttpNetworkRequest::HighPriority: + prioAndSlot[0] = 0x00; // == prio 0 (highest) + break; + case QHttpNetworkRequest::NormalPriority: + prioAndSlot[0] = 0x80; // == prio 4 + break; + case QHttpNetworkRequest::LowPriority: + prioAndSlot[0] = 0xe0; // == prio 7 (lowest) + break; + } + prioAndSlot[1] = 0x00; // slot in client certificates (not supported currently) + wireData.append(prioAndSlot, 2); + + wireData.append(namesAndValues); + + sendControlFrame(FrameType_SYN_STREAM, flags, wireData.constData(), length); + + if (reply->d_func()->state == QHttpNetworkReplyPrivate::SPDYUploading) + uploadData(streamID); +} + +void QSpdyProtocolHandler::sendRST_STREAM(qint32 streamID, RST_STREAM_STATUS_CODE statusCode) +{ + char wireData[8]; + appendIntToFourBytes(wireData, streamID); + appendIntToFourBytes(wireData + 4, statusCode); + sendControlFrame(FrameType_RST_STREAM, /* flags = */ 0, wireData, /* length = */ 8); +} + +void QSpdyProtocolHandler::sendPING(quint32 pingID) +{ + char rawData[4]; + appendIntToFourBytes(rawData, pingID); + sendControlFrame(FrameType_PING, /* flags = */ 0, rawData, /* length = */ 4); +} + +bool QSpdyProtocolHandler::uploadData(qint32 streamID) +{ + // we only rely on SPDY flow control here and don't care about TCP buffers + + HttpMessagePair messagePair = m_inFlightStreams.value(streamID); + QHttpNetworkRequest request = messagePair.first; + QHttpNetworkReply *reply = messagePair.second; + Q_ASSERT(reply); + QHttpNetworkReplyPrivate *replyPrivate = reply->d_func(); + Q_ASSERT(replyPrivate); + + qint32 dataLeftInWindow = replyPrivate->windowSizeUpload + - replyPrivate->currentlyUploadedDataInWindow; + + while (dataLeftInWindow > 0 && !request.uploadByteDevice()->atEnd()) { + + // get pointer to upload data + qint64 currentReadSize = 0; + const char *readPointer = request.uploadByteDevice()->readPointer(dataLeftInWindow, + currentReadSize); + + if (currentReadSize == -1) { + // premature eof happened + m_connection->d_func()->emitReplyError(m_socket, reply, + QNetworkReply::UnknownNetworkError); + return false; + } else if (readPointer == 0 || currentReadSize == 0) { + // nothing to read currently, break the loop + break; + } else { + DataFrameFlags flags = 0; + // we will send the FIN flag later if appropriate + qint64 currentWriteSize = sendDataFrame(streamID, flags, currentReadSize, readPointer); + if (currentWriteSize == -1 || currentWriteSize != currentReadSize) { + // socket broke down + m_connection->d_func()->emitReplyError(m_socket, reply, + QNetworkReply::UnknownNetworkError); + return false; + } else { + replyPrivate->currentlyUploadedDataInWindow += currentWriteSize; + replyPrivate->totallyUploadedData += currentWriteSize; + dataLeftInWindow = replyPrivate->windowSizeUpload + - replyPrivate->currentlyUploadedDataInWindow; + request.uploadByteDevice()->advanceReadPointer(currentWriteSize); + + emit reply->dataSendProgress(replyPrivate->totallyUploadedData, + request.contentLength()); + } + } + } + if (replyPrivate->totallyUploadedData == request.contentLength()) { + DataFrameFlags finFlag = DataFrame_FLAG_FIN; + qint64 writeSize = sendDataFrame(streamID, finFlag, 0, 0); + Q_ASSERT(writeSize == 0); + Q_UNUSED(writeSize); // silence -Wunused-variable + replyPrivate->state = QHttpNetworkReplyPrivate::SPDYHalfClosed; + // ### this will not work if the content length is not known, but + // then again many servers will fail in this case anyhow according + // to the SPDY RFC + } + return true; +} + +void QSpdyProtocolHandler::_q_uploadDataReadyRead() +{ + QNonContiguousByteDevice *device = qobject_cast<QNonContiguousByteDevice *>(sender()); + Q_ASSERT(device); + qint32 streamID = device->property("SPDYStreamID").toInt(); + Q_ASSERT(streamID > 0); + uploadData(streamID); +} + +void QSpdyProtocolHandler::sendWINDOW_UPDATE(qint32 streamID, quint32 deltaWindowSize) +{ + char windowUpdateData[8]; + appendIntToFourBytes(windowUpdateData, streamID); + appendIntToFourBytes(windowUpdateData + 4, deltaWindowSize); + + sendControlFrame(FrameType_WINDOW_UPDATE, /* flags = */ 0, windowUpdateData, /* length = */ 8); +} + +qint64 QSpdyProtocolHandler::sendDataFrame(qint32 streamID, DataFrameFlags flags, + quint32 length, const char *data) +{ + QByteArray wireData; + wireData.reserve(8); + + wireData.append(intToFourBytes(streamID)); + wireData.append(flags); + wireData.append(intToThreeBytes(length)); + + Q_ASSERT(m_socket); + m_socket->write(wireData); + + if (data) { + qint64 ret = m_socket->write(data, length); + return ret; + } else { + return 0; // nothing to write, e.g. FIN flag + } +} + +void QSpdyProtocolHandler::handleControlFrame(const QByteArray &frameHeaders) // ### make it char * +{ + Q_ASSERT(frameHeaders.count() >= 8); + qint16 version = twoBytesToInt(frameHeaders.constData()); + version &= 0x3fff; // eliminate most significant bit to determine version + Q_ASSERT(version == 3); + + qint16 type = twoBytesToInt(frameHeaders.constData() + 2); + + char flags = frameHeaders.at(4); + qint32 length = threeBytesToInt(frameHeaders.constData() + 5); + Q_ASSERT(length > 0); + + QByteArray frameData; + frameData.resize(length); + if (!readNextChunk(length, frameData.data())) { + // put back the frame headers to the buffer + m_spdyBuffer.prepend(frameHeaders); + return; // we couldn't read the whole frame and need to wait + } else { + m_spdyBuffer.clear(); + m_waitingForCompleteStream = false; + } + + switch (type) { + case FrameType_SYN_STREAM: { + handleSYN_STREAM(flags, length, frameData); + break; + } + case FrameType_SYN_REPLY: { + handleSYN_REPLY(flags, length, frameData); + break; + } + case FrameType_RST_STREAM: { + handleRST_STREAM(flags, length, frameData); + break; + } + case FrameType_SETTINGS: { + handleSETTINGS(flags, length, frameData); + break; + } + case FrameType_PING: { + handlePING(flags, length, frameData); + break; + } + case FrameType_GOAWAY: { + handleGOAWAY(flags, length, frameData); + break; + } + case FrameType_HEADERS: { + handleHEADERS(flags, length, frameData); + break; + } + case FrameType_WINDOW_UPDATE: { + handleWINDOW_UPDATE(flags, length, frameData); + break; + } + default: + qWarning() << Q_FUNC_INFO << "cannot handle frame of type" << type; + } +} + +void QSpdyProtocolHandler::handleSYN_STREAM(char /*flags*/, quint32 /*length*/, + const QByteArray &frameData) +{ + // not implemented; will be implemented when servers start using it + // we just tell the server that we do not accept that + + qint32 streamID = getStreamID(frameData.constData()); + + sendRST_STREAM(streamID, RST_STREAM_REFUSED_STREAM); +} + +void QSpdyProtocolHandler::handleSYN_REPLY(char flags, quint32 /*length*/, const QByteArray &frameData) +{ + parseHttpHeaders(flags, frameData); +} + +void QSpdyProtocolHandler::parseHttpHeaders(char flags, const QByteArray &frameData) +{ + qint32 streamID = getStreamID(frameData.constData()); + + flags &= 0x3f; + bool flag_fin = flags & 0x01; + + QByteArray headerValuePairs = frameData.mid(4); + + HttpMessagePair pair = m_inFlightStreams.value(streamID); + QHttpNetworkReply *httpReply = pair.second; + Q_ASSERT(httpReply != 0); + + QByteArray uncompressedHeader; + if (!uncompressHeader(headerValuePairs, &uncompressedHeader)) { + qWarning() << Q_FUNC_INFO << "error reading header from SYN_REPLY message"; + return; + } + + qint32 headerCount = fourBytesToInt(uncompressedHeader.constData()); + qint32 readPointer = 4; + for (qint32 a = 0; a < headerCount; ++a) { + qint32 count = fourBytesToInt(uncompressedHeader.constData() + readPointer); + readPointer += 4; + QByteArray name = uncompressedHeader.mid(readPointer, count); + readPointer += count; + count = fourBytesToInt(uncompressedHeader.constData() + readPointer); + readPointer += 4; + QByteArray value = uncompressedHeader.mid(readPointer, count); + readPointer += count; + if (name == ":status") { + httpReply->setStatusCode(value.left(3).toInt()); + httpReply->d_func()->reasonPhrase = QString::fromLatin1(value.mid(4)); + } else if (name == ":version") { + int majorVersion = value.at(5) - 48; + int minorVersion = value.at(7) - 48; + httpReply->d_func()->majorVersion = majorVersion; + httpReply->d_func()->minorVersion = minorVersion; + } else if (name == "content-length") { + httpReply->setContentLength(value.toLongLong()); + } else { + if (value.contains('\0')) { + QList<QByteArray> values = value.split('\0'); + QByteArray binder(", "); + if (name == "set-cookie") + binder = "\n"; + value.clear(); + Q_FOREACH (const QByteArray& ivalue, values) { + if (value.isEmpty()) + value = ivalue; + else + value += binder + ivalue; + } + } + httpReply->setHeaderField(name, value); + } + } + emit httpReply->headerChanged(); + + if (flag_fin) { + switch (httpReply->d_func()->state) { + case QHttpNetworkReplyPrivate::SPDYSYNSent: + httpReply->d_func()->state = QHttpNetworkReplyPrivate::SPDYHalfClosed; + break; + case QHttpNetworkReplyPrivate::SPDYHalfClosed: + replyFinished(httpReply, streamID); + break; + case QHttpNetworkReplyPrivate::SPDYClosed: { + sendRST_STREAM(streamID, RST_STREAM_PROTOCOL_ERROR); + replyFinishedWithError(httpReply, streamID, QNetworkReply::ProtocolFailure, + "server sent SYN_REPLY on an already closed stream"); + break; + } + default: + qWarning() << Q_FUNC_INFO << "got data frame in unknown state"; + } + } +} + +void QSpdyProtocolHandler::handleRST_STREAM(char /*flags*/, quint32 length, + const QByteArray &frameData) +{ + // flags are ignored + + Q_ASSERT(length == 8); + Q_UNUSED(length); // silence -Wunused-parameter + qint32 streamID = getStreamID(frameData.constData()); + QHttpNetworkReply *httpReply = m_inFlightStreams.value(streamID).second; + + qint32 statusCodeInt = fourBytesToInt(frameData.constData() + 4); + RST_STREAM_STATUS_CODE statusCode = static_cast<RST_STREAM_STATUS_CODE>(statusCodeInt); + QNetworkReply::NetworkError errorCode; + QByteArray errorMessage; + + switch (statusCode) { + case RST_STREAM_PROTOCOL_ERROR: + errorCode = QNetworkReply::ProtocolFailure; + errorMessage = "SPDY protocol error"; + break; + case RST_STREAM_INVALID_STREAM: + errorCode = QNetworkReply::ProtocolFailure; + errorMessage = "SPDY stream is not active"; + break; + case RST_STREAM_REFUSED_STREAM: + errorCode = QNetworkReply::ProtocolFailure; + errorMessage = "SPDY stream was refused"; + break; + case RST_STREAM_UNSUPPORTED_VERSION: + errorCode = QNetworkReply::ProtocolUnknownError; + errorMessage = "SPDY version is unknown to the server"; + break; + case RST_STREAM_CANCEL: + errorCode = QNetworkReply::ProtocolFailure; + errorMessage = "SPDY stream is no longer needed"; + break; + case RST_STREAM_INTERNAL_ERROR: + errorCode = QNetworkReply::InternalServerError; + errorMessage = "Internal server error"; + break; + case RST_STREAM_FLOW_CONTROL_ERROR: + errorCode = QNetworkReply::ProtocolFailure; + errorMessage = "peer violated the flow control protocol"; + break; + case RST_STREAM_STREAM_IN_USE: + errorCode = QNetworkReply::ProtocolFailure; + errorMessage = "server received a SYN_REPLY for an already open stream"; + break; + case RST_STREAM_STREAM_ALREADY_CLOSED: + errorCode = QNetworkReply::ProtocolFailure; + errorMessage = "server received data or a SYN_REPLY for an already half-closed stream"; + break; + case RST_STREAM_INVALID_CREDENTIALS: + errorCode = QNetworkReply::ContentAccessDenied; + errorMessage = "server received invalid credentials"; + break; + case RST_STREAM_FRAME_TOO_LARGE: + errorCode = QNetworkReply::ProtocolFailure; + errorMessage = "server cannot process the frame because it is too large"; + break; + default: + qWarning() << Q_FUNC_INFO << "could not understand servers RST_STREAM status code"; + errorCode = QNetworkReply::ProtocolFailure; + errorMessage = "got SPDY RST_STREAM message with unknown error code"; + } + if (httpReply) + replyFinishedWithError(httpReply, streamID, errorCode, errorMessage.constData()); +} + +void QSpdyProtocolHandler::handleSETTINGS(char flags, quint32 /*length*/, const QByteArray &frameData) +{ + Q_ASSERT(frameData.count() > 0); + + SETTINGS_Flags settingsFlags = static_cast<SETTINGS_Flags>(flags); + if (settingsFlags & FLAG_SETTINGS_CLEAR_SETTINGS) { + // ### clear all persistent settings; since we do not persist settings + // as of now, we don't need to clear anything either + } + + qint32 numberOfEntries = fourBytesToInt(frameData.constData()); + Q_ASSERT(numberOfEntries > 0); + for (int a = 0, frameDataIndex = 4; a < numberOfEntries; ++a, frameDataIndex += 8) { + SETTINGS_ID_Flag idFlag = static_cast<SETTINGS_ID_Flag>(frameData[frameDataIndex]); + if (idFlag & FLAG_SETTINGS_PERSIST_VALUE) { + // ### we SHOULD persist the settings here according to the RFC, but we don't have to, + // so implement that later + } // the other value is only sent by us, but not received + + quint32 uniqueID = static_cast<SETTINGS_ID>( + threeBytesToInt(frameData.constData() + frameDataIndex + 1)); + quint32 value = fourBytesToInt(frameData.constData() + frameDataIndex + 4); + switch (uniqueID) { + case SETTINGS_UPLOAD_BANDWIDTH: { + // ignored for now, just an estimated informative value + break; + } + case SETTINGS_DOWNLOAD_BANDWIDTH: { + // ignored for now, just an estimated informative value + break; + } + case SETTINGS_ROUND_TRIP_TIME: { + // ignored for now, just an estimated informative value + break; + } + case SETTINGS_MAX_CONCURRENT_STREAMS: { + m_maxConcurrentStreams = value; + break; + } + case SETTINGS_CURRENT_CWND: { + // ignored for now, just an informative value + break; + } + case SETTINGS_DOWNLOAD_RETRANS_RATE: { + // ignored for now, just an estimated informative value + break; + } + case SETTINGS_INITIAL_WINDOW_SIZE: { + m_initialWindowSize = value; + break; + } + case SETTINGS_CLIENT_CERTIFICATE_VECTOR_SIZE: { + // client certificates are not supported + break; + } + default: + qWarning() << Q_FUNC_INFO << "found unknown settings value" << value; + } + } +} + +void QSpdyProtocolHandler::handlePING(char /*flags*/, quint32 length, const QByteArray &frameData) +{ + // flags are ignored + + Q_ASSERT(length == 4); + Q_UNUSED(length); // silence -Wunused-parameter + quint32 pingID = fourBytesToInt(frameData.constData()); + + // odd numbered IDs must be ignored + if ((pingID & 1) == 0) // is even? + sendPING(pingID); +} + +void QSpdyProtocolHandler::handleGOAWAY(char /*flags*/, quint32 /*length*/, + const QByteArray &frameData) +{ + // flags are ignored + + qint32 statusCode = static_cast<GOAWAY_STATUS>(fourBytesToInt(frameData.constData() + 4)); + QNetworkReply::NetworkError errorCode; + switch (statusCode) { + case GOAWAY_OK: { + errorCode = QNetworkReply::NoError; + break; + } + case GOAWAY_PROTOCOL_ERROR: { + errorCode = QNetworkReply::ProtocolFailure; + break; + } + case GOAWAY_INTERNAL_ERROR: { + errorCode = QNetworkReply::InternalServerError; + break; + } + default: + qWarning() << Q_FUNC_INFO << "unexpected status code" << statusCode; + errorCode = QNetworkReply::ProtocolUnknownError; + } + + qint32 lastGoodStreamID = getStreamID(frameData.constData()); + + // emit errors for all replies after the last good stream ID + Q_ASSERT(m_connection); + for (qint32 currentStreamID = lastGoodStreamID + 2; currentStreamID <= m_nextStreamID; + ++currentStreamID) { + QHttpNetworkReply *reply = m_inFlightStreams.value(currentStreamID).second; + Q_ASSERT(reply); + m_connection->d_func()->emitReplyError(m_socket, reply, errorCode); + } + // ### we could make sure a new session is initiated anyhow +} + +void QSpdyProtocolHandler::handleHEADERS(char flags, quint32 /*length*/, + const QByteArray &frameData) +{ + parseHttpHeaders(flags, frameData); +} + +void QSpdyProtocolHandler::handleWINDOW_UPDATE(char /*flags*/, quint32 /*length*/, + const QByteArray &frameData) +{ + qint32 streamID = getStreamID(frameData.constData()); + qint32 deltaWindowSize = fourBytesToInt(frameData.constData() + 4); + + QHttpNetworkReply *reply = m_inFlightStreams.value(streamID).second; + Q_ASSERT(reply); + QHttpNetworkReplyPrivate *replyPrivate = reply->d_func(); + Q_ASSERT(replyPrivate); + + replyPrivate->currentlyUploadedDataInWindow = replyPrivate->windowSizeUpload - deltaWindowSize; + uploadData(streamID); // we hopefully can continue to upload +} + + +void QSpdyProtocolHandler::handleDataFrame(const QByteArray &frameHeaders) +{ + Q_ASSERT(frameHeaders.count() >= 8); + + qint32 streamID = getStreamID(frameHeaders.constData()); + unsigned char flags = static_cast<unsigned char>(frameHeaders.at(4)); + flags &= 0x3f; + bool flag_fin = flags & 0x01; + bool flag_compress = flags & 0x02; + qint32 length = threeBytesToInt(frameHeaders.constData() + 5); + + QByteArray data; + data.resize(length); + if (!readNextChunk(length, data.data())) { + // put back the frame headers to the buffer + m_spdyBuffer.prepend(frameHeaders); + return; // we couldn't read the whole frame and need to wait + } else { + m_spdyBuffer.clear(); + m_waitingForCompleteStream = false; + } + + HttpMessagePair pair = m_inFlightStreams.value(streamID); + QHttpNetworkRequest httpRequest = pair.first; + QHttpNetworkReply *httpReply = pair.second; + Q_ASSERT(httpReply != 0); + + QHttpNetworkReplyPrivate *replyPrivate = httpReply->d_func(); + + // check whether we need to send WINDOW_UPDATE (i.e. tell the sender it can send more) + replyPrivate->currentlyReceivedDataInWindow += length; + qint32 dataLeftInWindow = replyPrivate->windowSizeDownload - replyPrivate->currentlyReceivedDataInWindow; + + if (replyPrivate->currentlyReceivedDataInWindow > 0 + && dataLeftInWindow < replyPrivate->windowSizeDownload / 2) { + + // socket read buffer size is 64K actually, hard coded in the channel + // We can read way more than 64K per socket, because the window size + // here is per stream. + if (replyPrivate->windowSizeDownload >= m_socket->readBufferSize()) { + replyPrivate->windowSizeDownload = m_socket->readBufferSize(); + } else { + replyPrivate->windowSizeDownload *= 1.5; + } + QMetaObject::invokeMethod(this, "sendWINDOW_UPDATE", Qt::QueuedConnection, + Q_ARG(qint32, streamID), + Q_ARG(quint32, replyPrivate->windowSizeDownload)); + // setting the current data count to 0 is a race condition, + // because we call sendWINDOW_UPDATE through the event loop. + // But then again, the whole situation is a race condition because + // we don't know when the packet will arrive at the server; so + // this is most likely good enough here. + replyPrivate->currentlyReceivedDataInWindow = 0; + } + + httpReply->d_func()->compressedData.append(data); + + + replyPrivate->totalProgress += length; + + if (httpRequest.d->autoDecompress && httpReply->d_func()->isCompressed()) { + QByteDataBuffer inDataBuffer; // ### should we introduce one in the http reply? + inDataBuffer.append(data); + qint64 compressedCount = httpReply->d_func()->uncompressBodyData(&inDataBuffer, + &replyPrivate->responseData); + Q_ASSERT(compressedCount >= 0); + Q_UNUSED(compressedCount); // silence -Wunused-variable + } else { + replyPrivate->responseData.append(data); + } + + if (replyPrivate->shouldEmitSignals()) { + emit httpReply->readyRead(); + emit httpReply->dataReadProgress(replyPrivate->totalProgress, replyPrivate->bodyLength); + } + + if (flag_compress) { + qWarning() << Q_FUNC_INFO << "SPDY level compression is not supported"; + } + + if (flag_fin) { + switch (httpReply->d_func()->state) { + case QHttpNetworkReplyPrivate::SPDYSYNSent: + httpReply->d_func()->state = QHttpNetworkReplyPrivate::SPDYHalfClosed; + // ### send FIN ourselves? + break; + case QHttpNetworkReplyPrivate::SPDYHalfClosed: + replyFinished(httpReply, streamID); + break; + case QHttpNetworkReplyPrivate::SPDYClosed: { + sendRST_STREAM(streamID, RST_STREAM_PROTOCOL_ERROR); + replyFinishedWithError(httpReply, streamID, QNetworkReply::ProtocolFailure, + "server sent data on an already closed stream"); + break; + } + default: + qWarning() << Q_FUNC_INFO << "got data frame in unknown state"; + } + } +} + +void QSpdyProtocolHandler::replyFinished(QHttpNetworkReply *httpReply, qint32 streamID) +{ + httpReply->d_func()->state = QHttpNetworkReplyPrivate::SPDYClosed; + int streamsRemoved = m_inFlightStreams.remove(streamID); + Q_ASSERT(streamsRemoved == 1); + Q_UNUSED(streamsRemoved); // silence -Wunused-variable + emit httpReply->finished(); +} + +void QSpdyProtocolHandler::replyFinishedWithError(QHttpNetworkReply *httpReply, qint32 streamID, + QNetworkReply::NetworkError errorCode, const char *errorMessage) +{ + Q_ASSERT(httpReply); + httpReply->d_func()->state = QHttpNetworkReplyPrivate::SPDYClosed; + int streamsRemoved = m_inFlightStreams.remove(streamID); + Q_ASSERT(streamsRemoved == 1); + Q_UNUSED(streamsRemoved); // silence -Wunused-variable + emit httpReply->finishedWithError(errorCode, QSpdyProtocolHandler::tr(errorMessage)); +} + +qint32 QSpdyProtocolHandler::generateNextStreamID() +{ + // stream IDs initiated by the client must be odd + m_nextStreamID += 2; + return m_nextStreamID; +} + +QT_END_NAMESPACE + +#endif // !defined(QT_NO_HTTP) && !defined(QT_NO_SSL) |