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KIMAP Library

sessionthread.cpp

00001 /*
00002     Copyright (c) 2009 Kevin Ottens <ervin@kde.org>
00003 
00004     This library is free software; you can redistribute it and/or modify it
00005     under the terms of the GNU Library General Public License as published by
00006     the Free Software Foundation; either version 2 of the License, or (at your
00007     option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful, but WITHOUT
00010     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00011     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00012     License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public License
00015     along with this library; see the file COPYING.LIB.  If not, write to the
00016     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00017     02110-1301, USA.
00018 */
00019 
00020 #include "sessionthread_p.h"
00021 
00022 #include <QtCore/QDebug>
00023 #include <QtCore/QTimer>
00024 
00025 #include <KDE/KDebug>
00026 
00027 #include "imapstreamparser.h"
00028 #include "message_p.h"
00029 #include "session.h"
00030 
00031 using namespace KIMAP;
00032 
00033 Q_DECLARE_METATYPE(KTcpSocket::Error)
00034 Q_DECLARE_METATYPE(KSslErrorUiData)
00035 static const int _kimap_socketErrorTypeId = qRegisterMetaType<KTcpSocket::Error>();
00036 static const int _kimap_sslErrorUiData = qRegisterMetaType<KSslErrorUiData>();
00037 
00038 SessionThread::SessionThread( const QString &hostName, quint16 port, Session *parent )
00039   : QThread(), m_hostName(hostName), m_port(port),
00040     m_session(parent), m_socket(0), m_stream(0), m_encryptedMode(false)
00041 {
00042   // Yeah, sounds weird, but QThread object is linked to the parent
00043   // thread not to itself, and I'm too lazy to introduce yet another
00044   // internal QObject
00045   moveToThread(this);
00046 }
00047 
00048 SessionThread::~SessionThread()
00049 {
00050   // don't call quit() directly, this will deadlock in wait() if exec() hasn't run yet
00051   QMetaObject::invokeMethod( this, "quit" );
00052   wait();
00053 }
00054 
00055 void SessionThread::sendData( const QByteArray &payload )
00056 {
00057   QMutexLocker locker(&m_mutex);
00058 
00059   m_dataQueue.enqueue( payload );
00060   QTimer::singleShot( 0, this, SLOT( writeDataQueue() ) );
00061 }
00062 
00063 void SessionThread::writeDataQueue()
00064 {
00065   QMutexLocker locker(&m_mutex);
00066 
00067   while ( !m_dataQueue.isEmpty() ) {
00068     m_socket->write( m_dataQueue.dequeue() );
00069   }
00070 }
00071 
00072 void SessionThread::readMessage()
00073 {
00074   QMutexLocker locker(&m_mutex);
00075 
00076   if ( m_stream->availableDataSize()==0 ) {
00077     return;
00078   }
00079 
00080   Message message;
00081   QList<Message::Part> *payload = &message.content;
00082 
00083   try {
00084     while ( !m_stream->atCommandEnd() ) {
00085       if ( m_stream->hasString() ) {
00086         *payload << Message::Part(m_stream->readString());
00087       } else if ( m_stream->hasList() ) {
00088         *payload << Message::Part(m_stream->readParenthesizedList());
00089       } else if ( m_stream->hasResponseCode() ) {
00090         payload = &message.responseCode;
00091       } else if ( m_stream->atResponseCodeEnd() ) {
00092         payload = &message.content;
00093       } else if ( m_stream->hasLiteral() ) {
00094         QByteArray literal;
00095         while ( !m_stream->atLiteralEnd() ) {
00096           literal+= m_stream->readLiteralPart();
00097         }
00098         *payload << Message::Part(literal);
00099       }
00100     }
00101 
00102     emit responseReceived(message);
00103 
00104   } catch (KIMAP::ImapParserException e) {
00105     qWarning() << "The stream parser raised an exception:" << e.what();
00106   }
00107 
00108   if ( m_stream->availableDataSize()>1 ) {
00109     QTimer::singleShot( 0, this, SLOT( readMessage() ) );
00110   }
00111 
00112 }
00113 
00114 void SessionThread::closeSocket()
00115 {
00116   QMutexLocker locker(&m_mutex);
00117 
00118   m_encryptedMode = false;
00119   QMetaObject::invokeMethod( m_socket, "close" );
00120 }
00121 
00122 void SessionThread::reconnect()
00123 {
00124   QMutexLocker locker(&m_mutex);
00125 
00126   if ( m_socket->state() != SessionSocket::ConnectedState &&
00127        m_socket->state() != SessionSocket::ConnectingState ) {
00128     if (m_encryptedMode) {
00129       m_socket->connectToHostEncrypted(m_hostName, m_port);
00130     } else {
00131       m_socket->connectToHost(m_hostName, m_port);
00132     }
00133   }
00134 }
00135 
00136 void SessionThread::run()
00137 {
00138   m_socket = new SessionSocket;
00139   m_stream = new ImapStreamParser( m_socket );
00140   connect( m_socket, SIGNAL(readyRead()),
00141            this, SLOT(readMessage()), Qt::QueuedConnection );
00142 
00143   connect( m_socket, SIGNAL(disconnected()),
00144            m_session, SLOT(socketDisconnected()) );
00145   connect( m_socket, SIGNAL(connected()),
00146            m_session, SLOT(socketConnected()) );
00147   connect( m_socket, SIGNAL(error(KTcpSocket::Error)),
00148            m_session, SLOT(socketError()) );
00149 
00150 
00151   connect( this, SIGNAL(responseReceived(KIMAP::Message)),
00152            m_session, SLOT(responseReceived(KIMAP::Message)) );
00153 
00154   QTimer::singleShot( 0, this, SLOT( reconnect() ) );
00155   exec();
00156 
00157   delete m_stream;
00158   delete m_socket;
00159 }
00160 
00161 void SessionThread::startSsl(const KTcpSocket::SslVersion &version)
00162 {
00163   QMutexLocker locker(&m_mutex);
00164 
00165   m_socket->setAdvertisedSslVersion(version);
00166   m_socket->ignoreSslErrors();
00167   connect(m_socket, SIGNAL(encrypted()), this, SLOT(sslConnected()));
00168   m_socket->startClientEncryption();
00169 }
00170 
00171 void SessionThread::sslConnected()
00172 {
00173   QMutexLocker locker(&m_mutex);
00174   KSslCipher cipher = m_socket->sessionCipher();
00175 
00176   if ( m_socket->sslErrors().count() > 0 || m_socket->encryptionMode() != KTcpSocket::SslClientMode
00177       || cipher.isNull() || cipher.usedBits() == 0) {
00178       kDebug() << "Initial SSL handshake failed. cipher.isNull() is" << cipher.isNull()
00179                     << ", cipher.usedBits() is" << cipher.usedBits()
00180                     << ", the socket says:" <<  m_socket->errorString()
00181                     << "and the list of SSL errors contains"
00182                     << m_socket->sslErrors().count() << "items.";
00183      KSslErrorUiData errorData(m_socket);
00184      emit sslError(errorData);
00185   } else {
00186     kDebug() << "TLS negotiation done.";
00187     m_encryptedMode = true;
00188     emit encryptionNegotiationResult(true);
00189   }
00190 }
00191 
00192 void SessionThread::sslErrorHandlerResponse(bool response)
00193 {
00194   QMutexLocker locker(&m_mutex);
00195   if (response) {
00196     m_encryptedMode = true;
00197     emit encryptionNegotiationResult(true);
00198   } else {
00199      m_encryptedMode = false;
00200      //reconnect in unencrypted mode, so new commands can be issued
00201      m_socket->disconnectFromHost();
00202      m_socket->waitForDisconnected();
00203      m_socket->connectToHost(m_hostName, m_port);
00204      emit encryptionNegotiationResult(false);
00205   }
00206 }
00207 
00208 #include "sessionthread_p.moc"
00209 

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