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/****************************************************************************
**
** Copyright (C) 2016 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 <QtTest/QtTest>
#include <QtNetwork/private/http2protocol_p.h>
#include <QtNetwork/private/bitstreams_p.h>
#include "http2srv.h"
#ifndef QT_NO_SSL
#include <QtNetwork/qsslconfiguration.h>
#include <QtNetwork/qsslsocket.h>
#include <QtNetwork/qsslkey.h>
#endif
#include <QtNetwork/qtcpsocket.h>
#include <QtCore/qtimer.h>
#include <QtCore/qdebug.h>
#include <QtCore/qlist.h>
#include <QtCore/qfile.h>
#include <cstdlib>
#include <cstring>
#include <limits>
QT_BEGIN_NAMESPACE
using namespace Http2;
using namespace HPack;
namespace
{
inline bool is_valid_client_stream(quint32 streamID)
{
// A valid client stream ID is an odd integer number in the range [1, INT_MAX].
return (streamID & 0x1) && streamID <= quint32(std::numeric_limits<qint32>::max());
}
void fill_push_header(const HttpHeader &originalRequest, HttpHeader &promisedRequest)
{
for (const auto &field : originalRequest) {
if (field.name == QByteArray(":authority") ||
field.name == QByteArray(":scheme")) {
promisedRequest.push_back(field);
}
}
}
}
Http2Server::Http2Server(bool h2c, const Http2::RawSettings &ss, const Http2::RawSettings &cs)
: serverSettings(ss),
expectedClientSettings(cs),
clearTextHTTP2(h2c)
{
responseBody = "<html>\n"
"<head>\n"
"<title>Sample \"Hello, World\" Application</title>\n"
"</head>\n"
"<body bgcolor=white>\n"
"<table border=\"0\" cellpadding=\"10\">\n"
"<tr>\n"
"<td>\n"
"<img src=\"images/springsource.png\">\n"
"</td>\n"
"<td>\n"
"<h1>Sample \"Hello, World\" Application</h1>\n"
"</td>\n"
"</tr>\n"
"</table>\n"
"<p>This is the home page for the HelloWorld Web application. </p>\n"
"</body>\n"
"</html>";
}
Http2Server::~Http2Server()
{
}
void Http2Server::enablePushPromise(bool pushEnabled, const QByteArray &path)
{
pushPromiseEnabled = pushEnabled;
pushPath = path;
}
void Http2Server::setResponseBody(const QByteArray &body)
{
responseBody = body;
}
void Http2Server::emulateGOAWAY(int timeout)
{
Q_ASSERT(timeout >= 0);
testingGOAWAY = true;
goawayTimeout = timeout;
}
void Http2Server::startServer()
{
#ifdef QT_NO_SSL
// Let the test fail with timeout.
if (!clearTextHTTP2)
return;
#endif
if (listen()) {
if (clearTextHTTP2)
authority = QStringLiteral("127.0.0.1:%1").arg(serverPort()).toLatin1();
emit serverStarted(serverPort());
}
}
bool Http2Server::sendProtocolSwitchReply()
{
Q_ASSERT(socket);
Q_ASSERT(clearTextHTTP2 && upgradeProtocol);
// The first and the last HTTP/1.1 response we send:
const char response[] = "HTTP/1.1 101 Switching Protocols\r\n"
"Connection: Upgrade\r\n"
"Upgrade: h2c\r\n\r\n";
const qint64 size = sizeof response - 1;
return socket->write(response, size) == size;
}
void Http2Server::sendServerSettings()
{
Q_ASSERT(socket);
if (!serverSettings.size())
return;
writer.start(FrameType::SETTINGS, FrameFlag::EMPTY, connectionStreamID);
for (auto it = serverSettings.cbegin(); it != serverSettings.cend(); ++it) {
writer.append(it.key());
writer.append(it.value());
if (it.key() == Settings::INITIAL_WINDOW_SIZE_ID)
streamRecvWindowSize = it.value();
}
writer.write(*socket);
// Now, let's update our peer on a session recv window size:
const quint32 updatedSize = 10 * streamRecvWindowSize;
if (sessionRecvWindowSize < updatedSize) {
const quint32 delta = updatedSize - sessionRecvWindowSize;
sessionRecvWindowSize = updatedSize;
sessionCurrRecvWindow = updatedSize;
sendWINDOW_UPDATE(connectionStreamID, delta);
}
waitingClientAck = true;
settingsSent = true;
}
void Http2Server::sendGOAWAY(quint32 streamID, quint32 error, quint32 lastStreamID)
{
Q_ASSERT(socket);
writer.start(FrameType::GOAWAY, FrameFlag::EMPTY, streamID);
writer.append(lastStreamID);
writer.append(error);
writer.write(*socket);
}
void Http2Server::sendRST_STREAM(quint32 streamID, quint32 error)
{
Q_ASSERT(socket);
writer.start(FrameType::RST_STREAM, FrameFlag::EMPTY, streamID);
writer.append(error);
writer.write(*socket);
}
void Http2Server::sendDATA(quint32 streamID, quint32 windowSize)
{
Q_ASSERT(socket);
const auto it = suspendedStreams.find(streamID);
Q_ASSERT(it != suspendedStreams.end());
const quint32 offset = it->second;
Q_ASSERT(offset < quint32(responseBody.size()));
const quint32 bytes = std::min<quint32>(windowSize, responseBody.size() - offset);
const quint32 frameSizeLimit(clientSetting(Settings::MAX_FRAME_SIZE_ID, Http2::maxFrameSize));
const uchar *src = reinterpret_cast<const uchar *>(responseBody.constData() + offset);
const bool last = offset + bytes == quint32(responseBody.size());
writer.start(FrameType::DATA, FrameFlag::EMPTY, streamID);
writer.writeDATA(*socket, frameSizeLimit, src, bytes);
if (last) {
writer.start(FrameType::DATA, FrameFlag::END_STREAM, streamID);
writer.setPayloadSize(0);
writer.write(*socket);
suspendedStreams.erase(it);
activeRequests.erase(streamID);
Q_ASSERT(closedStreams.find(streamID) == closedStreams.end());
closedStreams.insert(streamID);
} else {
it->second += bytes;
}
}
void Http2Server::sendWINDOW_UPDATE(quint32 streamID, quint32 delta)
{
Q_ASSERT(socket);
writer.start(FrameType::WINDOW_UPDATE, FrameFlag::EMPTY, streamID);
writer.append(delta);
writer.write(*socket);
}
void Http2Server::incomingConnection(qintptr socketDescriptor)
{
if (clearTextHTTP2) {
socket.reset(new QTcpSocket);
const bool set = socket->setSocketDescriptor(socketDescriptor);
Q_ASSERT(set);
// Stop listening:
close();
upgradeProtocol = true;
QMetaObject::invokeMethod(this, "connectionEstablished",
Qt::QueuedConnection);
} else {
#ifndef QT_NO_SSL
socket.reset(new QSslSocket);
QSslSocket *sslSocket = static_cast<QSslSocket *>(socket.data());
// Add HTTP2 as supported protocol:
auto conf = QSslConfiguration::defaultConfiguration();
auto protos = conf.allowedNextProtocols();
protos.prepend(QSslConfiguration::ALPNProtocolHTTP2);
conf.setAllowedNextProtocols(protos);
sslSocket->setSslConfiguration(conf);
// SSL-related setup ...
sslSocket->setPeerVerifyMode(QSslSocket::VerifyNone);
sslSocket->setProtocol(QSsl::TlsV1_2OrLater);
connect(sslSocket, SIGNAL(sslErrors(QList<QSslError>)),
this, SLOT(ignoreErrorSlot()));
QFile file(SRCDIR "certs/fluke.key");
file.open(QIODevice::ReadOnly);
QSslKey key(file.readAll(), QSsl::Rsa, QSsl::Pem, QSsl::PrivateKey);
sslSocket->setPrivateKey(key);
auto localCert = QSslCertificate::fromPath(SRCDIR "certs/fluke.cert");
sslSocket->setLocalCertificateChain(localCert);
sslSocket->setSocketDescriptor(socketDescriptor, QAbstractSocket::ConnectedState);
// Stop listening.
close();
// Start SSL handshake and ALPN:
connect(sslSocket, SIGNAL(encrypted()), this, SLOT(connectionEstablished()));
sslSocket->startServerEncryption();
#else
Q_UNREACHABLE();
#endif
}
}
quint32 Http2Server::clientSetting(Http2::Settings identifier, quint32 defaultValue)
{
const auto it = expectedClientSettings.find(identifier);
if (it != expectedClientSettings.end())
return it.value();
return defaultValue;
}
bool Http2Server::readMethodLine()
{
// We know for sure that Qt did the right thing sending us the correct
// Request-line with CRLF at the end ...
// We're overly simplistic here but all we need to know - the method.
while (socket->bytesAvailable()) {
char c = 0;
if (socket->read(&c, 1) != 1)
return false;
if (c == '\n' && requestLine.endsWith('\r')) {
if (requestLine.startsWith("GET"))
requestType = QHttpNetworkRequest::Get;
else if (requestLine.startsWith("POST"))
requestType = QHttpNetworkRequest::Post;
else
requestType = QHttpNetworkRequest::Custom; // 'invalid'.
requestLine.clear();
return true;
} else {
requestLine.append(c);
}
}
return false;
}
bool Http2Server::verifyProtocolUpgradeRequest()
{
Q_ASSERT(protocolUpgradeHandler.data());
bool connectionOk = false;
bool upgradeOk = false;
bool settingsOk = false;
QHttpNetworkReplyPrivate *firstRequestReader = protocolUpgradeHandler->d_func();
// That's how we append them, that's what I expect to find:
for (const auto &header : firstRequestReader->fields) {
if (header.first == "Connection")
connectionOk = header.second.contains("Upgrade, HTTP2-Settings");
else if (header.first == "Upgrade")
upgradeOk = header.second.contains("h2c");
else if (header.first == "HTTP2-Settings")
settingsOk = true;
}
return connectionOk && upgradeOk && settingsOk;
}
void Http2Server::triggerGOAWAYEmulation()
{
Q_ASSERT(testingGOAWAY);
auto timer = new QTimer(this);
timer->setSingleShot(true);
connect(timer, &QTimer::timeout, [this]() {
sendGOAWAY(quint32(connectionStreamID), quint32(INTERNAL_ERROR), 0);
});
timer->start(goawayTimeout);
}
void Http2Server::connectionEstablished()
{
using namespace Http2;
if (testingGOAWAY && !clearTextHTTP2)
return triggerGOAWAYEmulation();
// For clearTextHTTP2 we first have to respond with 'protocol switch'
// and then continue with whatever logic we have (testingGOAWAY or not),
// otherwise our 'peer' cannot process HTTP/2 frames yet.
connect(socket.data(), SIGNAL(readyRead()),
this, SLOT(readReady()));
waitingClientPreface = true;
waitingClientAck = false;
waitingClientSettings = false;
settingsSent = false;
if (clearTextHTTP2) {
requestLine.clear();
// Now we have to handle HTTP/1.1 request. We use Get/Post in our test,
// so set requestType to something unsupported:
requestType = QHttpNetworkRequest::Options;
} else {
// We immediately send our settings so that our client
// can use flow control correctly.
sendServerSettings();
}
if (socket->bytesAvailable())
readReady();
}
void Http2Server::ignoreErrorSlot()
{
#ifndef QT_NO_SSL
static_cast<QSslSocket *>(socket.data())->ignoreSslErrors();
#endif
}
// Now HTTP2 "server" part:
/*
This code is overly simplified but it tests the basic HTTP2 expected behavior:
1. CONNECTION PREFACE
2. SETTINGS
3. sends our own settings (to modify the flow control)
4. collects and reports requests
5. if asked - sends responds to those requests
6. does some very basic error handling
7. tests frames validity/stream logic at the very basic level.
*/
void Http2Server::readReady()
{
if (connectionError)
return;
if (upgradeProtocol) {
handleProtocolUpgrade();
} else if (waitingClientPreface) {
handleConnectionPreface();
} else {
const auto status = reader.read(*socket);
switch (status) {
case FrameStatus::incompleteFrame:
break;
case FrameStatus::goodFrame:
handleIncomingFrame();
break;
default:
connectionError = true;
sendGOAWAY(connectionStreamID, PROTOCOL_ERROR, connectionStreamID);
}
}
if (socket->bytesAvailable())
QMetaObject::invokeMethod(this, "readReady", Qt::QueuedConnection);
}
void Http2Server::handleProtocolUpgrade()
{
using ReplyPrivate = QHttpNetworkReplyPrivate;
Q_ASSERT(upgradeProtocol);
if (!protocolUpgradeHandler.data())
protocolUpgradeHandler.reset(new Http11Reply);
QHttpNetworkReplyPrivate *firstRequestReader = protocolUpgradeHandler->d_func();
// QHttpNetworkReplyPrivate parses ... reply. It will, unfortunately, fail
// on the first line ... which is a part of request. So we read this line
// and extract the method first.
if (firstRequestReader->state == ReplyPrivate::NothingDoneState) {
if (!readMethodLine())
return;
if (requestType != QHttpNetworkRequest::Get && requestType != QHttpNetworkRequest::Post) {
emit invalidRequest(1);
return;
}
firstRequestReader->state = ReplyPrivate::ReadingHeaderState;
}
if (!socket->bytesAvailable())
return;
if (firstRequestReader->state == ReplyPrivate::ReadingHeaderState)
firstRequestReader->readHeader(socket.data());
else if (firstRequestReader->state == ReplyPrivate::ReadingDataState)
firstRequestReader->readBodyFast(socket.data(), &firstRequestReader->responseData);
switch (firstRequestReader->state) {
case ReplyPrivate::ReadingHeaderState:
return;
case ReplyPrivate::ReadingDataState:
if (requestType == QHttpNetworkRequest::Post)
return;
break;
case ReplyPrivate::AllDoneState:
break;
default:
socket->close();
return;
}
if (!verifyProtocolUpgradeRequest() || !sendProtocolSwitchReply()) {
socket->close();
return;
}
upgradeProtocol = false;
protocolUpgradeHandler.reset(nullptr);
if (testingGOAWAY)
return triggerGOAWAYEmulation();
// HTTP/1.1 'fields' we have in firstRequestRead are useless (they are not
// even allowed in HTTP/2 header). Let's pretend we have received
// valid HTTP/2 headers and can extract fields we need:
HttpHeader h2header;
h2header.push_back(HeaderField(":scheme", "http")); // we are in clearTextHTTP2 mode.
h2header.push_back(HeaderField(":authority", authority));
activeRequests[1] = std::move(h2header);
// After protocol switch we immediately send our SETTINGS.
sendServerSettings();
if (requestType == QHttpNetworkRequest::Get)
emit receivedRequest(1);
else
emit receivedData(1);
}
void Http2Server::handleConnectionPreface()
{
Q_ASSERT(waitingClientPreface);
if (socket->bytesAvailable() < clientPrefaceLength)
return; // Wait for more data ...
char buf[clientPrefaceLength] = {};
socket->read(buf, clientPrefaceLength);
if (std::memcmp(buf, Http2clientPreface, clientPrefaceLength)) {
sendGOAWAY(connectionStreamID, PROTOCOL_ERROR, connectionStreamID);
emit clientPrefaceError();
connectionError = true;
return;
}
waitingClientPreface = false;
waitingClientSettings = true;
}
void Http2Server::handleIncomingFrame()
{
// Frames that our implementation can send include:
// 1. SETTINGS (happens only during connection preface,
// handled already by this point)
// 2. SETTIGNS with ACK should be sent only as a response
// to a server's SETTINGS
// 3. HEADERS
// 4. CONTINUATION
// 5. DATA
// 6. PING
// 7. RST_STREAM
// 8. GOAWAY
if (testingGOAWAY) {
// GOAWAY test is simplistic for now: after HTTP/2 was
// negotiated (via ALPN/NPN or a protocol switch), send
// a GOAWAY frame after some (probably non-zero) timeout.
// We do not handle any frames, but timeout gives QNAM
// more time to initiate more streams and thus make the
// test more interesting/complex (on a client side).
return;
}
inboundFrame = std::move(reader.inboundFrame());
if (continuedRequest.size()) {
if (inboundFrame.type() != FrameType::CONTINUATION ||
inboundFrame.streamID() != continuedRequest.front().streamID()) {
sendGOAWAY(connectionStreamID, PROTOCOL_ERROR, connectionStreamID);
emit invalidFrame();
connectionError = true;
return;
}
}
switch (inboundFrame.type()) {
case FrameType::SETTINGS:
handleSETTINGS();
break;
case FrameType::HEADERS:
case FrameType::CONTINUATION:
continuedRequest.push_back(std::move(inboundFrame));
processRequest();
break;
case FrameType::DATA:
handleDATA();
break;
case FrameType::RST_STREAM:
// TODO: this is not tested for now.
break;
case FrameType::PING:
// TODO: this is not tested for now.
break;
case FrameType::GOAWAY:
// TODO: this is not tested for now.
break;
case FrameType::WINDOW_UPDATE:
handleWINDOW_UPDATE();
break;
default:;
}
}
void Http2Server::handleSETTINGS()
{
// SETTINGS is either a part of the connection preface,
// or a SETTINGS ACK.
Q_ASSERT(inboundFrame.type() == FrameType::SETTINGS);
if (inboundFrame.flags().testFlag(FrameFlag::ACK)) {
if (!waitingClientAck || inboundFrame.dataSize()) {
emit invalidFrame();
connectionError = true;
waitingClientAck = false;
return;
}
waitingClientAck = false;
emit serverSettingsAcked();
return;
}
// QHttp2ProtocolHandler always sends some settings,
// and the size is a multiple of 6.
if (!inboundFrame.dataSize() || inboundFrame.dataSize() % 6) {
sendGOAWAY(connectionStreamID, FRAME_SIZE_ERROR, connectionStreamID);
emit clientPrefaceError();
connectionError = true;
return;
}
const uchar *src = inboundFrame.dataBegin();
const uchar *end = src + inboundFrame.dataSize();
const auto notFound = expectedClientSettings.end();
while (src != end) {
const auto id = Http2::Settings(qFromBigEndian<quint16>(src));
const auto value = qFromBigEndian<quint32>(src + 2);
if (expectedClientSettings.find(id) == notFound ||
expectedClientSettings[id] != value) {
emit clientPrefaceError();
connectionError = true;
return;
}
src += 6;
}
// Send SETTINGS ACK:
writer.start(FrameType::SETTINGS, FrameFlag::ACK, connectionStreamID);
writer.write(*socket);
waitingClientSettings = false;
emit clientPrefaceOK();
}
void Http2Server::handleDATA()
{
Q_ASSERT(inboundFrame.type() == FrameType::DATA);
const auto streamID = inboundFrame.streamID();
if (!is_valid_client_stream(streamID) ||
closedStreams.find(streamID) != closedStreams.end()) {
emit invalidFrame();
connectionError = true;
sendGOAWAY(connectionStreamID, PROTOCOL_ERROR, connectionStreamID);
return;
}
const auto payloadSize = inboundFrame.payloadSize();
if (sessionCurrRecvWindow < payloadSize) {
// Client does not respect our session window size!
emit invalidRequest(streamID);
connectionError = true;
sendGOAWAY(connectionStreamID, FLOW_CONTROL_ERROR, connectionStreamID);
return;
}
auto it = streamWindows.find(streamID);
if (it == streamWindows.end())
it = streamWindows.insert(std::make_pair(streamID, streamRecvWindowSize)).first;
if (it->second < payloadSize) {
emit invalidRequest(streamID);
connectionError = true;
sendGOAWAY(connectionStreamID, FLOW_CONTROL_ERROR, connectionStreamID);
return;
}
it->second -= payloadSize;
if (it->second < streamRecvWindowSize / 2) {
sendWINDOW_UPDATE(streamID, streamRecvWindowSize / 2);
it->second += streamRecvWindowSize / 2;
}
sessionCurrRecvWindow -= payloadSize;
if (sessionCurrRecvWindow < sessionRecvWindowSize / 2) {
// This is some quite naive and trivial logic on when to update.
sendWINDOW_UPDATE(connectionStreamID, sessionRecvWindowSize / 2);
sessionCurrRecvWindow += sessionRecvWindowSize / 2;
}
if (inboundFrame.flags().testFlag(FrameFlag::END_STREAM)) {
closedStreams.insert(streamID); // Enter "half-closed remote" state.
streamWindows.erase(it);
emit receivedData(streamID);
}
}
void Http2Server::handleWINDOW_UPDATE()
{
const auto streamID = inboundFrame.streamID();
if (!streamID) // We ignore this for now to keep things simple.
return;
if (streamID && suspendedStreams.find(streamID) == suspendedStreams.end()) {
if (closedStreams.find(streamID) == closedStreams.end()) {
sendRST_STREAM(streamID, PROTOCOL_ERROR);
emit invalidFrame();
connectionError = true;
}
return;
}
const quint32 delta = qFromBigEndian<quint32>(inboundFrame.dataBegin());
if (!delta || delta > quint32(std::numeric_limits<qint32>::max())) {
sendRST_STREAM(streamID, PROTOCOL_ERROR);
emit invalidFrame();
connectionError = true;
return;
}
emit windowUpdate(streamID);
sendDATA(streamID, delta);
}
void Http2Server::sendResponse(quint32 streamID, bool emptyBody)
{
Q_ASSERT(activeRequests.find(streamID) != activeRequests.end());
const quint32 maxFrameSize(clientSetting(Settings::MAX_FRAME_SIZE_ID,
Http2::maxFrameSize));
if (pushPromiseEnabled) {
// A real server supporting PUSH_PROMISE will probably first send
// PUSH_PROMISE and then a normal response (to a real request),
// so that a client parsing this response and discovering another
// resource it needs, will _already_ have this additional resource
// in PUSH_PROMISE.
lastPromisedStream += 2;
writer.start(FrameType::PUSH_PROMISE, FrameFlag::END_HEADERS, streamID);
writer.append(lastPromisedStream);
HttpHeader pushHeader;
fill_push_header(activeRequests[streamID], pushHeader);
pushHeader.push_back(HeaderField(":method", "GET"));
pushHeader.push_back(HeaderField(":path", pushPath));
// Now interesting part, let's make it into 'stream':
activeRequests[lastPromisedStream] = pushHeader;
HPack::BitOStream ostream(writer.outboundFrame().buffer);
const bool result = encoder.encodeRequest(ostream, pushHeader);
Q_ASSERT(result);
// Well, it's not HEADERS, it's PUSH_PROMISE with ... HEADERS block.
// Should work.
writer.writeHEADERS(*socket, maxFrameSize);
qDebug() << "server sent a PUSH_PROMISE on" << lastPromisedStream;
if (responseBody.isEmpty())
responseBody = QByteArray("I PROMISE (AND PUSH) YOU ...");
// Now we send this promised data as a normal response on our reserved
// stream (disabling PUSH_PROMISE for the moment to avoid recursion):
pushPromiseEnabled = false;
sendResponse(lastPromisedStream, false);
pushPromiseEnabled = true;
// Now we'll continue with _normal_ response.
}
writer.start(FrameType::HEADERS, FrameFlag::END_HEADERS, streamID);
if (emptyBody)
writer.addFlag(FrameFlag::END_STREAM);
HttpHeader header = {{":status", "200"}};
if (!emptyBody) {
header.push_back(HPack::HeaderField("content-length",
QString("%1").arg(responseBody.size()).toLatin1()));
}
HPack::BitOStream ostream(writer.outboundFrame().buffer);
const bool result = encoder.encodeResponse(ostream, header);
Q_ASSERT(result);
writer.writeHEADERS(*socket, maxFrameSize);
if (!emptyBody) {
Q_ASSERT(suspendedStreams.find(streamID) == suspendedStreams.end());
const quint32 windowSize = clientSetting(Settings::INITIAL_WINDOW_SIZE_ID,
Http2::defaultSessionWindowSize);
// Suspend to immediately resume it.
suspendedStreams[streamID] = 0; // start sending from offset 0
sendDATA(streamID, windowSize);
} else {
activeRequests.erase(streamID);
closedStreams.insert(streamID);
}
}
void Http2Server::processRequest()
{
Q_ASSERT(continuedRequest.size());
if (!continuedRequest.back().flags().testFlag(FrameFlag::END_HEADERS))
return;
// We test here:
// 1. stream is 'idle'.
// 2. has priority set and dependency (it's 0x0 at the moment).
// 3. header can be decompressed.
const auto &headersFrame = continuedRequest.front();
const auto streamID = headersFrame.streamID();
if (!is_valid_client_stream(streamID)) {
emit invalidRequest(streamID);
connectionError = true;
sendGOAWAY(connectionStreamID, PROTOCOL_ERROR, connectionStreamID);
return;
}
if (closedStreams.find(streamID) != closedStreams.end()) {
emit invalidFrame();
connectionError = true;
sendGOAWAY(connectionStreamID, PROTOCOL_ERROR, connectionStreamID);
return;
}
quint32 dep = 0;
uchar w = 0;
if (!headersFrame.priority(&dep, &w)) {
emit invalidFrame();
sendRST_STREAM(streamID, PROTOCOL_ERROR);
return;
}
// Assemble headers ...
quint32 totalSize = 0;
for (const auto &frame : continuedRequest) {
if (std::numeric_limits<quint32>::max() - frame.dataSize() < totalSize) {
// Resulted in overflow ...
emit invalidFrame();
connectionError = true;
sendGOAWAY(connectionStreamID, PROTOCOL_ERROR, connectionStreamID);
return;
}
totalSize += frame.dataSize();
}
std::vector<uchar> hpackBlock(totalSize);
auto dst = hpackBlock.begin();
for (const auto &frame : continuedRequest) {
if (!frame.dataSize())
continue;
std::copy(frame.dataBegin(), frame.dataBegin() + frame.dataSize(), dst);
dst += frame.dataSize();
}
HPack::BitIStream inputStream{&hpackBlock[0], &hpackBlock[0] + hpackBlock.size()};
if (!decoder.decodeHeaderFields(inputStream)) {
emit decompressionFailed(streamID);
sendRST_STREAM(streamID, COMPRESSION_ERROR);
closedStreams.insert(streamID);
return;
}
// Actually, if needed, we can do a comparison here.
activeRequests[streamID] = decoder.decodedHeader();
if (headersFrame.flags().testFlag(FrameFlag::END_STREAM))
emit receivedRequest(streamID);
// else - we're waiting for incoming DATA frames ...
continuedRequest.clear();
}
QT_END_NAMESPACE
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