C++ MythSocket::ConnectToHost方法代码示例

MythSocket *RemoteFile::openSocket(bool control)
{
    QUrl qurl(path);
    QString dir;

    QString host = qurl.host();
    int port = qurl.port();

    dir = qurl.path();

    if (qurl.hasQuery())
#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
        dir += "?" + QUrl::fromPercentEncoding(
                   qurl.query(QUrl::FullyEncoded).toLocal8Bit());
#else
        dir += "?" + QUrl::fromPercentEncoding(qurl.encodedQuery());
#endif

    if (qurl.hasFragment())
        dir += "#" + qurl.fragment();

    QString sgroup = qurl.userName();

    MythSocket *lsock = new MythSocket();
    QString stype = (control) ? "control socket" : "file data socket";

    QString loc = QString("RemoteFile::openSocket(%1): ").arg(stype);

    if (port <= 0)
    {
        port = GetMythDB()->GetSettingOnHost("BackendServerPort", host).toInt();

        // if we still have no port use the default
        if (port <= 0)
            port = 6543;
    }

    if (!lsock->ConnectToHost(host, port))
    {
        LOG(VB_GENERAL, LOG_ERR, loc +
            QString("Could not connect to server %1:%2") .arg(host).arg(port));
        lsock->DecrRef();
        return NULL;
    }

    QString hostname = GetMythDB()->GetHostName();

    QStringList strlist;

#ifndef IGNORE_PROTO_VER_MISMATCH
    if (!gCoreContext->CheckProtoVersion(lsock))
    {
        LOG(VB_GENERAL, LOG_ERR, loc +
            QString("Failed validation to server %1:%2").arg(host).arg(port));
        lsock->DecrRef();
        return NULL;
    }
#endif

    if (control)
    {
        strlist.append(QString("ANN Playback %1 %2").arg(hostname).arg(false));
        if (!lsock->SendReceiveStringList(strlist))
        {
            LOG(VB_GENERAL, LOG_ERR, loc +
                QString("Could not read string list from server %1:%2")
                .arg(host).arg(port));
            lsock->DecrRef();
            return NULL;
        }
    }
    else
    {
        strlist.push_back(QString("ANN FileTransfer %1 %2 %3 %4")
                          .arg(hostname).arg(writemode)
                          .arg(usereadahead).arg(timeout_ms));
        strlist << QString("%1").arg(dir);
        strlist << sgroup;

        QStringList::const_iterator it = possibleauxfiles.begin();
        for (; it != possibleauxfiles.end(); ++it)
            strlist << *it;

        if (!lsock->SendReceiveStringList(strlist))
        {
            LOG(VB_GENERAL, LOG_ERR, loc +
                QString("Did not get proper response from %1:%2")
                .arg(host).arg(port));
            strlist.clear();
            strlist.push_back("ERROR");
            strlist.push_back("invalid response");
        }

        if (strlist.size() >= 3)
        {
            it = strlist.begin();
            ++it;
            recordernum = (*it).toInt();
            ++it;
            filesize = (*(it)).toLongLong();
//.........这里部分代码省略.........

int connect_to_master(void)
{
    MythSocket *tempMonitorConnection = new MythSocket();
    if (tempMonitorConnection->ConnectToHost(
            gCoreContext->GetMasterServerIP(),
            gCoreContext->GetMasterServerPort()))
    {
        if (!gCoreContext->CheckProtoVersion(tempMonitorConnection))
        {
            LOG(VB_GENERAL, LOG_ERR, "Master backend is incompatible with "
                    "this backend.\nCannot become a slave.");
            tempMonitorConnection->DecrRef();
            return GENERIC_EXIT_CONNECT_ERROR;
        }

        QStringList tempMonitorDone("DONE");

        QStringList tempMonitorAnnounce(QString("ANN Monitor %1 0")
                                            .arg(gCoreContext->GetHostName()));
        tempMonitorConnection->SendReceiveStringList(tempMonitorAnnounce);
        if (tempMonitorAnnounce.empty() ||
            tempMonitorAnnounce[0] == "ERROR")
        {
            tempMonitorConnection->DecrRef();
            tempMonitorConnection = NULL;
            if (tempMonitorAnnounce.empty())
            {
                LOG(VB_GENERAL, LOG_ERR, LOC +
                    "Failed to open event socket, timeout");
            }
            else
            {
                LOG(VB_GENERAL, LOG_ERR, LOC +
                    "Failed to open event socket" +
                    ((tempMonitorAnnounce.size() >= 2) ?
                    QString(", error was %1").arg(tempMonitorAnnounce[1]) :
                    QString(", remote error")));
            }
        }

        QStringList timeCheck;
        if (tempMonitorConnection)
        {
            timeCheck.push_back("QUERY_TIME_ZONE");
            tempMonitorConnection->SendReceiveStringList(timeCheck);
            tempMonitorConnection->WriteStringList(tempMonitorDone);
        }
        if (timeCheck.size() < 3)
        {
            if (tempMonitorConnection)
                tempMonitorConnection->DecrRef();
            return GENERIC_EXIT_SOCKET_ERROR;
        }

        QDateTime our_time = MythDate::current();
        QDateTime master_time = MythDate::fromString(timeCheck[2]);
        int timediff = abs(our_time.secsTo(master_time));

        if (timediff > 300)
        {
            LOG(VB_GENERAL, LOG_ERR,
                QString("Current time on the master backend differs by "
                        "%1 seconds from time on this system. Exiting.")
                .arg(timediff));
            if (tempMonitorConnection)
                tempMonitorConnection->DecrRef();
            return GENERIC_EXIT_INVALID_TIME;
        }

        if (timediff > 20)
        {
            LOG(VB_GENERAL, LOG_WARNING,
                    QString("Time difference between the master "
                            "backend and this system is %1 seconds.")
                .arg(timediff));
        }
    }
    if (tempMonitorConnection)
        tempMonitorConnection->DecrRef();

    return GENERIC_EXIT_OK;
}