jobclasses.cpp

konqueror3 embedded版本, KDE环境下的当家浏览器的嵌入式版本源码包.

    m_mimetype = "";
    m_firstdata = true;

    KIO_ARGS << m_outgoingMetaData;

    m_slave->send( CMD_META_DATA, packedArgs );

    SimpleJob::start( slave );
}

void TransferJob::kill()
{
// hmmm, disabled this check for now. it breaks 'stop'
// (Simon)
//    if ( m_detached )
//        return;

    SimpleJob::kill();
}

void TransferJob::detach( const QByteArray &cachedData )
{
    assert( !m_detached );

    m_detached = true;

    if ( !s_detachedJobs )
        s_detachedJobs = new QPtrList<TransferJob>;

    assert( s_detachedJobs->findRef( this ) == -1 );

    s_detachedJobs->append( this );

    m_cachedData.clear();
    m_cachedData << cachedData;
}

void TransferJob::attach()
{
    assert( s_detachedJobs );
    assert( m_detached );
    assert( s_detachedJobs->findRef( this ) != -1 );

    m_detached = false;
    s_detachedJobs->removeRef( this );

    QTimer::singleShot( 0, this, SLOT( slotEmitCachedData() ) );
    m_cachedDataEmitted = false;
}

void TransferJob::slotEmitCachedData()
{
    // ### re-check this

    while ( m_cachedData.count() > 0 )
    {
        QByteArray stuff = *m_cachedData.begin();
        m_cachedData.remove( m_cachedData.begin() );

        // ### do we need to check for redirection and the like, like in receiveData() ??
	recurseEnter();
	emit data( this, stuff );
	if ( recurseExit() )
	    return;
    }

    m_cachedDataEmitted = true;

    if ( m_finishAfterCacheEmit ) // we are done
    {
	// peri, QTimer::singleShot( 0, this, SLOT( slaveFinished() ) );
	// it is not required, here we are it means, slaveFinsihed is called
	// code copied from the 'slaveFinished'
    	if ( m_redirectionURL.isEmpty() || !m_redirectionURL.isValid() || m_error )
            SimpleJob::slaveFinished();
        else
        {
            kdDebug() << "performing redirection" << endl;

            m_staticData.truncate( 0 );

            m_url = m_redirectionURL;
            m_redirectionURL = KURL();

            KURL dummyURL;
            QString dummyString;

            switch ( m_command )
            {
                case CMD_GET:
                    {
                        kdDebug() << "CMD_GET redirection" << endl;
                        m_packedArgs.truncate( 0 );
                        QDataStream stream( m_packedArgs, IO_WriteOnly );
                        stream << m_url;
                    }
                    break;
                case CMD_SPECIAL:
                    {
                        kdDebug() << "HTTP_POST redirection" << endl;
                        int specialcmd;
                        QDataStream istream( m_packedArgs, IO_ReadOnly );
                        istream >> specialcmd;
                        assert( specialcmd == 1 );

                        addMetaData( "cache", "reload" );

                        m_packedArgs.truncate( 0 );
                        QDataStream stream( m_packedArgs, IO_WriteOnly );
                        stream << m_url;
                        m_command = CMD_GET;
                    }
                    break;
                default: assert( 0 );
            } 

            QTimer::singleShot( 0, this, SLOT( slotRedirectDelayed() ) );
        }
        return;
    } 
}

TransferJob *TransferJob::findDetachedJobForURL( const KURL &url )
{
    if ( !s_detachedJobs )
        return 0;

    QPtrListIterator<TransferJob> it( *s_detachedJobs );
    for ( ; it.current(); ++it )
        if ( it.current()->url() == url && !it.current()->isDestructing() )
            return it.current();

    return 0;
}

void TransferJob::dataReq()
{
    m_slave->send( MSG_DATA, m_staticData );
    m_staticData = QByteArray();
}

void TransferJob::slaveRedirection( const KURL &url )
{
    if ( m_redirectionList.contains( url ) > 5 )
    {
        m_error = ERR_CYCLIC_LINK;
        m_errorText = url.prettyURL();
    }
    else
    {
        kdDebug() << "redirection #1 : " << url.prettyURL() << endl;
        m_redirectionURL = url;
        m_redirectionList.append( url );
        emit redirection( this, url );
    }
}

void TransferJob::slaveFinished()
{
    m_slave->disconnect( this );

    // if we are detached then don't kill us.
    // also it could happen that the SST for the re-mission of the
    // cached data is pending and right before that we get called
    // here. so we need to sort that out here.
    if ( m_detached || m_cachedData.count() > 0 )
    {
	Scheduler::self()->releaseJob( this );
	m_finishAfterCacheEmit = true;
	return;
    }

    kdDebug() << "_finished" << endl;
    if ( m_redirectionURL.isEmpty() || !m_redirectionURL.isValid() || m_error )
        SimpleJob::slaveFinished();
    else
    {
        kdDebug() << "performing redirection" << endl;

        m_staticData.truncate( 0 );

        m_url = m_redirectionURL;
        m_redirectionURL = KURL();

        KURL dummyURL;
        QString dummyString;

        switch ( m_command )
        {
            case CMD_GET:
            {
                kdDebug() << "CMD_GET redirection" << endl;
                m_packedArgs.truncate( 0 );
                QDataStream stream( m_packedArgs, IO_WriteOnly );
                stream << m_url;
            }
            break;
            case CMD_SPECIAL:
            {
                kdDebug() << "HTTP_POST redirection" << endl;
                int specialcmd;
                QDataStream istream( m_packedArgs, IO_ReadOnly );
                istream >> specialcmd;
                assert( specialcmd == 1 );

                addMetaData( "cache", "reload" );

                m_packedArgs.truncate( 0 );
                QDataStream stream( m_packedArgs, IO_WriteOnly );
                stream << m_url;
                m_command = CMD_GET;
            }
            break;
            default: assert( 0 );
        }

        QTimer::singleShot( 0, this, SLOT( slotRedirectDelayed() ) );
    }

}

void TransferJob::slotRedirectDelayed()
{
    kdDebug() << "slotRedirectDelayed()" << endl;
    // ### optimize this
    Scheduler::self()->releaseJob( this );
    Scheduler::self()->doJob( this );
}

void TransferJob::filteredData( const QByteArray &dat )
{
    if ( m_redirectionURL.isEmpty() || !m_redirectionURL.isValid() || m_error )
    {
        if ( m_detached )
            m_cachedData << dat;
        else
        {
            // do we have data pending? if yes, then just append ;)
            if ( m_cachedData.count() > 0 && !m_cachedDataEmitted )
                m_cachedData << dat;
            else
		emit data( this, dat );
        }
    }
}

void TransferJob::receiveData( const QByteArray &dat )
{
    if ( m_firstdata )
    {
	m_firstdata = false;
	if ( m_mimetype.isEmpty() )
	{
	    // Try cheapest solution first
	    const MimeHandler* mime = MimeHandler::Find( m_url );
	    if ( !mime ) mime = MimeHandler::Find( dat );
	    if ( mime )
	    {
		mimeRules( mime );
		if ( m_mimetype.isEmpty() )
		    m_mimetype = mime->Preferred();
		recurseEnter();
		emit mimetype( this, m_mimetype );
		if ( recurseExit() )
		    return;
	    }
	}
    }
    recurseEnter();
    if ( m_filter )
	m_filter->dataInput( dat );
    else
	filteredData( dat );
    recurseExit();
}

void TransferJob::mimeRules( const MimeHandler* mime )
{
    if ( mime )
    {
	if ( mime->isFilter() )
	    AddFilter( mime->isFilter() );
	else if ( mime->isAlias() )
	    m_mimetype = mime->isAlias()->outputType();
    }
}

bool TransferJob::AddFilter( const MimeFilter* filter )
{
    if ( m_filter )
	return false;
    m_filter = filter->createFilter( m_mimetype, m_url );
    if ( m_filter )
    {
	m_mimetype = m_filter->outputType();
	if ( m_mimetype.isEmpty() )
	    m_mimetype = filter->outputType();
	QObject::connect( m_filter, SIGNAL( dataOutput( const QByteArray & ) ),
                          this, SLOT( filteredData( const QByteArray & ) ) );
	return true;
    }
    return false;
}

StatJob::StatJob(const KURL &url, int command, 
        const QByteArray &packedArgs, bool showProgressInfo)
    : TransferJob(url, command, packedArgs, QByteArray(), showProgressInfo)
{
}

#include "jobclasses.moc"

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