path: root/src/network/access/qhttpnetworkconnection.cpp

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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the QtNetwork module of the Qt Toolkit.
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#include "qhttpnetworkconnection_p.h"
#include "qhttpnetworkconnectionchannel_p.h"
#include "private/qnoncontiguousbytedevice_p.h"
#include <private/qnetworkrequest_p.h>
#include <private/qobject_p.h>
#include <private/qauthenticator_p.h>
#include <qnetworkproxy.h>
#include <qauthenticator.h>

#include <qbuffer.h>
#include <qpair.h>
#include <qhttp.h>
#include <qdebug.h>

#ifndef QT_NO_HTTP

#ifndef QT_NO_OPENSSL
#    include <QtNetwork/qsslkey.h>
#    include <QtNetwork/qsslcipher.h>
#    include <QtNetwork/qsslconfiguration.h>
#endif



QT_BEGIN_NAMESPACE

const int QHttpNetworkConnectionPrivate::channelCount = 6;

QHttpNetworkConnectionPrivate::QHttpNetworkConnectionPrivate(const QString &hostName, quint16 port, bool encrypt)
: hostName(hostName), port(port), encrypt(encrypt),
  pendingAuthSignal(false), pendingProxyAuthSignal(false)
#ifndef QT_NO_NETWORKPROXY
  , networkProxy(QNetworkProxy::NoProxy)
#endif

{
    channels = new QHttpNetworkConnectionChannel[channelCount];
}

QHttpNetworkConnectionPrivate::~QHttpNetworkConnectionPrivate()
{
    for (int i = 0; i < channelCount; ++i) {
        channels[i].socket->close();
        delete channels[i].socket;
    }
    delete []channels;
}

void QHttpNetworkConnectionPrivate::init()
{
    for (int i = 0; i < channelCount; i++) {
        channels[i].setConnection(this->q_func());
        channels[i].init();
    }
}

int QHttpNetworkConnectionPrivate::indexOf(QAbstractSocket *socket) const
{
    for (int i = 0; i < channelCount; ++i)
        if (channels[i].socket == socket)
            return i;

    qFatal("Called with unknown socket object.");
    return 0;
}

bool QHttpNetworkConnectionPrivate::isSocketBusy(QAbstractSocket *socket) const
{
    int i = indexOf(socket);
    return (channels[i].state & QHttpNetworkConnectionChannel::BusyState);
}

bool QHttpNetworkConnectionPrivate::isSocketWriting(QAbstractSocket *socket) const
{
    int i = indexOf(socket);
    return (i != -1 && (channels[i].state & QHttpNetworkConnectionChannel::WritingState));
}

bool QHttpNetworkConnectionPrivate::isSocketWaiting(QAbstractSocket *socket) const
{
    int i = indexOf(socket);
    return (i != -1 && (channels[i].state & QHttpNetworkConnectionChannel::WaitingState));
}

bool QHttpNetworkConnectionPrivate::isSocketReading(QAbstractSocket *socket) const
{
    int i = indexOf(socket);
    return (i != -1 && (channels[i].state & QHttpNetworkConnectionChannel::ReadingState));
}

qint64 QHttpNetworkConnectionPrivate::uncompressedBytesAvailable(const QHttpNetworkReply &reply) const
{
    return reply.d_func()->responseData.byteAmount();
}

qint64 QHttpNetworkConnectionPrivate::uncompressedBytesAvailableNextBlock(const QHttpNetworkReply &reply) const
{
    return reply.d_func()->responseData.sizeNextBlock();
}

void QHttpNetworkConnectionPrivate::prepareRequest(HttpMessagePair &messagePair)
{
    QHttpNetworkRequest &request = messagePair.first;
    QHttpNetworkReply *reply = messagePair.second;

    // add missing fields for the request
    QByteArray value;
    // check if Content-Length is provided
    QNonContiguousByteDevice* uploadByteDevice = request.uploadByteDevice();
    if (uploadByteDevice) {
        if (request.contentLength() != -1 && uploadByteDevice->size() != -1) {
            // both values known, take the smaller one.
            request.setContentLength(qMin(uploadByteDevice->size(), request.contentLength()));
        } else if (request.contentLength() == -1 && uploadByteDevice->size() != -1) {
            // content length not supplied by user, but the upload device knows it
            request.setContentLength(uploadByteDevice->size());
        } else if (request.contentLength() != -1 && uploadByteDevice->size() == -1) {
            // everything OK, the user supplied us the contentLength
        } else if (request.contentLength() == -1 && uploadByteDevice->size() == -1) {
            qFatal("QHttpNetworkConnectionPrivate: Neither content-length nor upload device size were given");
        }
    }
    // set the Connection/Proxy-Connection: Keep-Alive headers
#ifndef QT_NO_NETWORKPROXY
    if (networkProxy.type() == QNetworkProxy::HttpCachingProxy)  {
        value = request.headerField("proxy-connection");
        if (value.isEmpty())
            request.setHeaderField("Proxy-Connection", "Keep-Alive");
    } else {
#endif
        value = request.headerField("connection");
        if (value.isEmpty())
            request.setHeaderField("Connection", "Keep-Alive");
#ifndef QT_NO_NETWORKPROXY
    }
#endif

    // If the request had a accept-encoding set, we better not mess
    // with it. If it was not set, we announce that we understand gzip
    // and remember this fact in request.d->autoDecompress so that
    // we can later decompress the HTTP reply if it has such an
    // encoding.
    value = request.headerField("accept-encoding");
    if (value.isEmpty()) {
#ifndef QT_NO_COMPRESS
        request.setHeaderField("Accept-Encoding", "gzip");
        request.d->autoDecompress = true;
#else
        // if zlib is not available set this to false always
        request.d->autoDecompress = false;
#endif
    }
    // set the User Agent
    value = request.headerField("user-agent");
    if (value.isEmpty())
        request.setHeaderField("User-Agent", "Mozilla/5.0");
    // set the host
    value = request.headerField("host");
    if (value.isEmpty()) {
        QByteArray host = QUrl::toAce(hostName);

        int port = request.url().port();
        if (port != -1) {
            host += ':';
            host += QByteArray::number(port);
        }

        request.setHeaderField("Host", host);
    }

    reply->d_func()->requestIsPrepared = true;
}




void QHttpNetworkConnectionPrivate::emitReplyError(QAbstractSocket *socket,
                                                   QHttpNetworkReply *reply,
                                                   QNetworkReply::NetworkError errorCode)
{
    Q_Q(QHttpNetworkConnection);
    if (socket && reply) {
        // this error matters only to this reply
        reply->d_func()->errorString = errorDetail(errorCode, socket);
        emit reply->finishedWithError(errorCode, reply->d_func()->errorString);
        int i = indexOf(socket);
        // remove the corrupt data if any
        reply->d_func()->eraseData();
        channels[i].close();
        // send the next request
        QMetaObject::invokeMethod(q, "_q_startNextRequest", Qt::QueuedConnection);
    }
}

void QHttpNetworkConnectionPrivate::copyCredentials(int fromChannel, QAuthenticator *auth, bool isProxy)
{
    Q_ASSERT(auth);

    // select another channel
    QAuthenticator* otherAuth = 0;
    for (int i = 0; i < channelCount; ++i) {
        if (i == fromChannel)
            continue;
        if (isProxy)
            otherAuth = &channels[i].proxyAuthenticator;
        else
            otherAuth = &channels[i].authenticator;
        // if the credentials are different, copy them
        if (otherAuth->user().compare(auth->user()))
            otherAuth->setUser(auth->user());
        if (otherAuth->password().compare(auth->password()))
            otherAuth->setPassword(auth->password());
    }
}


// handles the authentication for one channel and eventually re-starts the other channels
bool QHttpNetworkConnectionPrivate::handleAuthenticateChallenge(QAbstractSocket *socket, QHttpNetworkReply *reply,
                                                                bool isProxy, bool &resend)
{
    Q_ASSERT(socket);
    Q_ASSERT(reply);

    Q_Q(QHttpNetworkConnection);

    resend = false;
    //create the response header to be used with QAuthenticatorPrivate.
    QHttpResponseHeader responseHeader;
    QList<QPair<QByteArray, QByteArray> > fields = reply->header();
    QList<QPair<QByteArray, QByteArray> >::const_iterator it = fields.constBegin();
    while (it != fields.constEnd()) {
        responseHeader.addValue(QString::fromLatin1(it->first), QString::fromUtf8(it->second));
        it++;
    }
    //find out the type of authentication protocol requested.
    QAuthenticatorPrivate::Method authMethod = reply->d_func()->authenticationMethod(isProxy);
    if (authMethod != QAuthenticatorPrivate::None) {
        int i = indexOf(socket);
        //Use a single authenticator for all domains. ### change later to use domain/realm
        QAuthenticator* auth = 0;
        if (isProxy) {
            auth = &channels[i].proxyAuthenticator;
            channels[i].proxyAuthMehtod = authMethod;
        } else {
            auth = &channels[i].authenticator;
            channels[i].authMehtod = authMethod;
        }
        //proceed with the authentication.
        if (auth->isNull())
            auth->detach();
        QAuthenticatorPrivate *priv = QAuthenticatorPrivate::getPrivate(*auth);
        priv->parseHttpResponse(responseHeader, isProxy);

        if (priv->phase == QAuthenticatorPrivate::Done) {
            if ((isProxy && pendingProxyAuthSignal) ||(!isProxy && pendingAuthSignal)) {
                // drop the request
                reply->d_func()->eraseData();
                channels[i].close();
                channels[i].lastStatus = 0;
                channels[i].state =  QHttpNetworkConnectionChannel::Wait4AuthState;
                return false;
            }
            // cannot use this socket until the slot returns
            channels[i].state = QHttpNetworkConnectionChannel::WaitingState;
            socket->blockSignals(true);
            if (!isProxy) {
                pendingAuthSignal = true;
                emit q->authenticationRequired(reply->request(), auth, q);
                pendingAuthSignal = false;
#ifndef QT_NO_NETWORKPROXY
            } else {
                pendingProxyAuthSignal = true;
                emit q->proxyAuthenticationRequired(networkProxy, auth, q);
                pendingProxyAuthSignal = false;
#endif
            }
            socket->blockSignals(false);
            // socket free to use
            channels[i].state = QHttpNetworkConnectionChannel::IdleState;
            if (priv->phase != QAuthenticatorPrivate::Done) {
                // send any pending requests
                copyCredentials(i,  auth, isProxy);
                QMetaObject::invokeMethod(q, "_q_restartAuthPendingRequests", Qt::QueuedConnection);
            }
        }
        // changing values in QAuthenticator will reset the 'phase'
        if (priv->phase == QAuthenticatorPrivate::Done) {
            // authentication is cancelled, send the current contents to the user.
            emit channels[i].reply->headerChanged();
            emit channels[i].reply->readyRead();
            QNetworkReply::NetworkError errorCode =
                isProxy
                ? QNetworkReply::ProxyAuthenticationRequiredError
                : QNetworkReply::AuthenticationRequiredError;
            reply->d_func()->errorString = errorDetail(errorCode, socket);
            emit q->error(errorCode, reply->d_func()->errorString);
            emit channels[i].reply->finished();
            // ### at this point the reply could be deleted
            socket->close();
            // remove pending request on the other channels
            for (int j = 0; j < channelCount; ++j) {
                if (j != i && channels[j].state ==  QHttpNetworkConnectionChannel::Wait4AuthState)
                    channels[j].state = QHttpNetworkConnectionChannel::IdleState;
            }
            return true;
        }
        //resend the request
        resend = true;
        return true;
    }
    return false;
}

void QHttpNetworkConnectionPrivate::createAuthorization(QAbstractSocket *socket, QHttpNetworkRequest &request)
{
    Q_ASSERT(socket);

    int i = indexOf(socket);

    if (channels[i].authMehtod != QAuthenticatorPrivate::None) {
        if (!(channels[i].authMehtod == QAuthenticatorPrivate::Ntlm && channels[i].lastStatus != 401)) {
            QAuthenticatorPrivate *priv = QAuthenticatorPrivate::getPrivate(channels[i].authenticator);
            if (priv && priv->method != QAuthenticatorPrivate::None) {
                QByteArray response = priv->calculateResponse(request.d->methodName(), request.d->uri(false));
                request.setHeaderField("authorization", response);
            }
        }
    }
    if (channels[i].proxyAuthMehtod != QAuthenticatorPrivate::None) {
        if (!(channels[i].proxyAuthMehtod == QAuthenticatorPrivate::Ntlm && channels[i].lastStatus != 407)) {
            QAuthenticatorPrivate *priv = QAuthenticatorPrivate::getPrivate(channels[i].proxyAuthenticator);
            if (priv && priv->method != QAuthenticatorPrivate::None) {
                QByteArray response = priv->calculateResponse(request.d->methodName(), request.d->uri(false));
                request.setHeaderField("proxy-authorization", response);
            }
        }
    }
}

QHttpNetworkReply* QHttpNetworkConnectionPrivate::queueRequest(const QHttpNetworkRequest &request)
{
    Q_Q(QHttpNetworkConnection);

    // The reply component of the pair is created initially.
    QHttpNetworkReply *reply = new QHttpNetworkReply(request.url());
    reply->setRequest(request);
    reply->d_func()->connection = q;
    HttpMessagePair pair = qMakePair(request, reply);

    switch (request.priority()) {
    case QHttpNetworkRequest::HighPriority:
        highPriorityQueue.prepend(pair);
        break;
    case QHttpNetworkRequest::NormalPriority:
    case QHttpNetworkRequest::LowPriority:
        lowPriorityQueue.prepend(pair);
        break;
    }
    QMetaObject::invokeMethod(q, "_q_startNextRequest", Qt::QueuedConnection);
    return reply;
}

void QHttpNetworkConnectionPrivate::unqueueAndSendRequest(QAbstractSocket *socket)
{
    Q_ASSERT(socket);

    int i = indexOf(socket);

    if (!highPriorityQueue.isEmpty()) {
        for (int j = highPriorityQueue.count() - 1; j >= 0; --j) {
            HttpMessagePair &messagePair = highPriorityQueue[j];
            if (!messagePair.second->d_func()->requestIsPrepared)
                prepareRequest(messagePair);

            channels[i].request = messagePair.first;
            channels[i].reply = messagePair.second;
            channels[i].sendRequest();
            highPriorityQueue.removeAt(j);
            return;
        }
    }

    if (!lowPriorityQueue.isEmpty()) {
        for (int j = lowPriorityQueue.count() - 1; j >= 0; --j) {
            HttpMessagePair &messagePair = lowPriorityQueue[j];
            if (!messagePair.second->d_func()->requestIsPrepared)
                prepareRequest(messagePair);
            channels[i].request = messagePair.first;
            channels[i].reply = messagePair.second;
            channels[i].sendRequest();
            lowPriorityQueue.removeAt(j);
            return;
        }
    }
}

void QHttpNetworkConnectionPrivate::resendCurrentRequest(QAbstractSocket *socket)
{
    Q_Q(QHttpNetworkConnection);
    Q_ASSERT(socket);
    int i = indexOf(socket);
    channels[i].close();
    channels[i].resendCurrent = true;
    QMetaObject::invokeMethod(q, "_q_startNextRequest", Qt::QueuedConnection);
}

QString QHttpNetworkConnectionPrivate::errorDetail(QNetworkReply::NetworkError errorCode, QAbstractSocket* socket)
{
    Q_ASSERT(socket);

    QString errorString;
    switch (errorCode) {
    case QNetworkReply::HostNotFoundError:
        errorString = QString::fromLatin1(QT_TRANSLATE_NOOP("QHttp", "Host %1 not found"))
                              .arg(socket->peerName());
        break;
    case QNetworkReply::ConnectionRefusedError:
        errorString = QLatin1String(QT_TRANSLATE_NOOP("QHttp", "Connection refused"));
        break;
    case QNetworkReply::RemoteHostClosedError:
        errorString = QLatin1String(QT_TRANSLATE_NOOP("QHttp", "Connection closed"));
        break;
    case QNetworkReply::TimeoutError:
        errorString = QLatin1String(QT_TRANSLATE_NOOP("QHttp", "HTTP request failed"));
        break;
    case QNetworkReply::ProxyAuthenticationRequiredError:
        errorString = QLatin1String(QT_TRANSLATE_NOOP("QHttp", "Proxy requires authentication"));
        break;
    case QNetworkReply::AuthenticationRequiredError:
        errorString = QLatin1String(QT_TRANSLATE_NOOP("QHttp", "Host requires authentication"));
        break;
    case QNetworkReply::ProtocolFailure:
        errorString = QLatin1String(QT_TRANSLATE_NOOP("QHttp", "Data corrupted"));
        break;
    case QNetworkReply::ProtocolUnknownError:
        errorString = QLatin1String(QT_TRANSLATE_NOOP("QHttp", "Unknown protocol specified"));
        break;
    case QNetworkReply::SslHandshakeFailedError:
        errorString = QLatin1String(QT_TRANSLATE_NOOP("QHttp", "SSL handshake failed"));
        break;
    default:
        // all other errors are treated as QNetworkReply::UnknownNetworkError
        errorString = QLatin1String(QT_TRANSLATE_NOOP("QHttp", "HTTP request failed"));
        break;
    }
    return errorString;
}

void QHttpNetworkConnectionPrivate::removeReply(QHttpNetworkReply *reply)
{
    Q_Q(QHttpNetworkConnection);

    // remove the from active list.
    for (int i = 0; i < channelCount; ++i) {
        if (channels[i].reply == reply) {
            channels[i].reply = 0;
            if (reply->d_func()->connectionCloseEnabled())
                channels[i].close();
            QMetaObject::invokeMethod(q, "_q_startNextRequest", Qt::QueuedConnection);
            return;
        }
    }
    // remove from the high priority queue
    if (!highPriorityQueue.isEmpty()) {
        for (int j = highPriorityQueue.count() - 1; j >= 0; --j) {
            HttpMessagePair messagePair = highPriorityQueue.at(j);
            if (messagePair.second == reply) {
                highPriorityQueue.removeAt(j);
                QMetaObject::invokeMethod(q, "_q_startNextRequest", Qt::QueuedConnection);
                return;
            }
        }
    }
    // remove from the low priority queue
    if (!lowPriorityQueue.isEmpty()) {
        for (int j = lowPriorityQueue.count() - 1; j >= 0; --j) {
            HttpMessagePair messagePair = lowPriorityQueue.at(j);
            if (messagePair.second == reply) {
                lowPriorityQueue.removeAt(j);
                QMetaObject::invokeMethod(q, "_q_startNextRequest", Qt::QueuedConnection);
                return;
            }
        }
    }
}



void QHttpNetworkConnectionPrivate::_q_startNextRequest()
{
    //resend the necessary ones.
    for (int i = 0; i < channelCount; ++i) {
        if (channels[i].resendCurrent) {
            channels[i].resendCurrent = false;
            channels[i].state = QHttpNetworkConnectionChannel::IdleState;
            if (channels[i].reply)
                channels[i].sendRequest();
        }
    }
    QAbstractSocket *socket = 0;
    for (int i = 0; i < channelCount; ++i) {
        QAbstractSocket *chSocket = channels[i].socket;
        // send the request using the idle socket
        if (!isSocketBusy(chSocket)) {
            socket = chSocket;
            break;
        }
    }
    if (!socket)
        return; // this will be called after finishing current request.
    unqueueAndSendRequest(socket);
}

void QHttpNetworkConnectionPrivate::_q_restartAuthPendingRequests()
{
    // send the request using the idle socket
    for (int i = 0 ; i < channelCount; ++i) {
        QAbstractSocket *socket = channels[i].socket;
        if (channels[i].state ==  QHttpNetworkConnectionChannel::Wait4AuthState) {
            channels[i].state = QHttpNetworkConnectionChannel::IdleState;
            if (channels[i].reply)
                channels[i].sendRequest();
        }
    }
}


QHttpNetworkConnection::QHttpNetworkConnection(const QString &hostName, quint16 port, bool encrypt, QObject *parent)
    : QObject(*(new QHttpNetworkConnectionPrivate(hostName, port, encrypt)), parent)
{
    Q_D(QHttpNetworkConnection);
    d->init();
}

QHttpNetworkConnection::~QHttpNetworkConnection()
{
}

QString QHttpNetworkConnection::hostName() const
{
    Q_D(const QHttpNetworkConnection);
    return d->hostName;
}

quint16 QHttpNetworkConnection::port() const
{
    Q_D(const QHttpNetworkConnection);
    return d->port;
}

QHttpNetworkReply* QHttpNetworkConnection::sendRequest(const QHttpNetworkRequest &request)
{
    Q_D(QHttpNetworkConnection);
    return d->queueRequest(request);
}

void QHttpNetworkConnection::enableEncryption()
{
    Q_D(QHttpNetworkConnection);
    d->encrypt = true;
}

bool QHttpNetworkConnection::isEncrypted() const
{
    Q_D(const QHttpNetworkConnection);
    return d->encrypt;
}

void QHttpNetworkConnection::setProxyAuthentication(QAuthenticator *authenticator)
{
    Q_D(QHttpNetworkConnection);
    for (int i = 0; i < d->channelCount; ++i)
        d->channels[i].proxyAuthenticator = *authenticator;
}

void QHttpNetworkConnection::setAuthentication(const QString &domain, QAuthenticator *authenticator)
{
    Q_UNUSED(domain); // ### domain ?
    Q_D(QHttpNetworkConnection);
    for (int i = 0; i < d->channelCount; ++i)
        d->channels[i].authenticator = *authenticator;
}

#ifndef QT_NO_NETWORKPROXY
void QHttpNetworkConnection::setCacheProxy(const QNetworkProxy &networkProxy)
{
    Q_D(QHttpNetworkConnection);
    d->networkProxy = networkProxy;
    // update the authenticator
    if (!d->networkProxy.user().isEmpty()) {
        for (int i = 0; i < d->channelCount; ++i) {
            d->channels[i].proxyAuthenticator.setUser(d->networkProxy.user());
            d->channels[i].proxyAuthenticator.setPassword(d->networkProxy.password());
        }
    }
}

QNetworkProxy QHttpNetworkConnection::cacheProxy() const
{
    Q_D(const QHttpNetworkConnection);
    return d->networkProxy;
}

void QHttpNetworkConnection::setTransparentProxy(const QNetworkProxy &networkProxy)
{
    Q_D(QHttpNetworkConnection);
    for (int i = 0; i < d->channelCount; ++i)
        d->channels[i].socket->setProxy(networkProxy);
}

QNetworkProxy QHttpNetworkConnection::transparentProxy() const
{
    Q_D(const QHttpNetworkConnection);
    return d->channels[0].socket->proxy();
}
#endif


// SSL support below
#ifndef QT_NO_OPENSSL
QSslConfiguration QHttpNetworkConnectionPrivate::sslConfiguration(const QHttpNetworkReply &reply) const
{
    if (!encrypt)
        return QSslConfiguration();

    for (int i = 0; i < channelCount; ++i)
        if (channels[i].reply == &reply)
            return static_cast<QSslSocket *>(channels[0].socket)->sslConfiguration();
    return QSslConfiguration(); // pending or done request
}

void QHttpNetworkConnection::setSslConfiguration(const QSslConfiguration &config)
{
    Q_D(QHttpNetworkConnection);
    if (!d->encrypt)
        return;

    // set the config on all channels
    for (int i = 0; i < d->channelCount; ++i)
        static_cast<QSslSocket *>(d->channels[i].socket)->setSslConfiguration(config);
}

void QHttpNetworkConnection::ignoreSslErrors(int channel)
{
    Q_D(QHttpNetworkConnection);
    if (!d->encrypt)
        return;

    if (channel == -1) { // ignore for all channels
        for (int i = 0; i < d->channelCount; ++i) {
            static_cast<QSslSocket *>(d->channels[i].socket)->ignoreSslErrors();
            d->channels[i].ignoreAllSslErrors = true;
        }

    } else {
        static_cast<QSslSocket *>(d->channels[channel].socket)->ignoreSslErrors();
        d->channels[channel].ignoreAllSslErrors = true;
    }
}

void QHttpNetworkConnection::ignoreSslErrors(const QList<QSslError> &errors, int channel)
{
    Q_D(QHttpNetworkConnection);
    if (!d->encrypt)
        return;

    if (channel == -1) { // ignore for all channels
        for (int i = 0; i < d->channelCount; ++i) {
            static_cast<QSslSocket *>(d->channels[i].socket)->ignoreSslErrors(errors);
            d->channels[i].ignoreSslErrorsList = errors;
        }

    } else {
        static_cast<QSslSocket *>(d->channels[channel].socket)->ignoreSslErrors(errors);
        d->channels[channel].ignoreSslErrorsList = errors;
    }
}

#endif //QT_NO_OPENSSL


QT_END_NAMESPACE

#include "moc_qhttpnetworkconnection_p.cpp"

#endif // QT_NO_HTTP