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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         QByteArray string = m_stream->readString();
00087         if ( string == "NIL" ) {
00088           *payload << Message::Part( QList<QByteArray>() );
00089         } else {
00090           *payload << Message::Part(string);
00091         }
00092       } else if ( m_stream->hasList() ) {
00093         *payload << Message::Part(m_stream->readParenthesizedList());
00094       } else if ( m_stream->hasResponseCode() ) {
00095         payload = &message.responseCode;
00096       } else if ( m_stream->atResponseCodeEnd() ) {
00097         payload = &message.content;
00098       } else if ( m_stream->hasLiteral() ) {
00099         QByteArray literal;
00100         while ( !m_stream->atLiteralEnd() ) {
00101           literal+= m_stream->readLiteralPart();
00102         }
00103         *payload << Message::Part(literal);
00104       }
00105     }
00106 
00107     emit responseReceived(message);
00108 
00109   } catch (KIMAP::ImapParserException e) {
00110     qWarning() << "The stream parser raised an exception:" << e.what();
00111   }
00112 
00113   if ( m_stream->availableDataSize()>1 ) {
00114     QTimer::singleShot( 0, this, SLOT( readMessage() ) );
00115   }
00116 
00117 }
00118 
00119 void SessionThread::closeSocket()
00120 {
00121   QMutexLocker locker(&m_mutex);
00122 
00123   m_encryptedMode = false;
00124   QTimer::singleShot( 0, this, SLOT( doCloseSocket() ) );
00125 }
00126 
00127 void SessionThread::doCloseSocket()
00128 {
00129   QMutexLocker locker(&m_mutex);
00130 
00131   m_socket->close();
00132 }
00133 
00134 void SessionThread::reconnect()
00135 {
00136   QMutexLocker locker(&m_mutex);
00137 
00138   if ( m_socket->state() != SessionSocket::ConnectedState &&
00139        m_socket->state() != SessionSocket::ConnectingState ) {
00140     if (m_encryptedMode) {
00141       m_socket->connectToHostEncrypted(m_hostName, m_port);
00142     } else {
00143       m_socket->connectToHost(m_hostName, m_port);
00144     }
00145   }
00146 }
00147 
00148 void SessionThread::run()
00149 {
00150   m_socket = new SessionSocket;
00151   m_stream = new ImapStreamParser( m_socket );
00152   connect( m_socket, SIGNAL(readyRead()),
00153            this, SLOT(readMessage()), Qt::QueuedConnection );
00154 
00155   connect( m_socket, SIGNAL(disconnected()),
00156            m_session, SLOT(socketDisconnected()) );
00157   connect( m_socket, SIGNAL(connected()),
00158            m_session, SLOT(socketConnected()) );
00159   connect( m_socket, SIGNAL(error(KTcpSocket::Error)),
00160            m_session, SLOT(socketError()) );
00161 
00162 
00163   connect( this, SIGNAL(responseReceived(KIMAP::Message)),
00164            m_session, SLOT(responseReceived(KIMAP::Message)) );
00165 
00166   QTimer::singleShot( 0, this, SLOT( reconnect() ) );
00167   exec();
00168 
00169   delete m_stream;
00170   delete m_socket;
00171 }
00172 
00173 void SessionThread::startSsl(const KTcpSocket::SslVersion &version)
00174 {
00175   QMutexLocker locker(&m_mutex);
00176 
00177   m_socket->setAdvertisedSslVersion(version);
00178   m_socket->ignoreSslErrors();
00179   connect(m_socket, SIGNAL(encrypted()), this, SLOT(sslConnected()));
00180   m_socket->startClientEncryption();
00181 }
00182 
00183 void SessionThread::sslConnected()
00184 {
00185   QMutexLocker locker(&m_mutex);
00186   KSslCipher cipher = m_socket->sessionCipher();
00187 
00188   if ( m_socket->sslErrors().count() > 0 || m_socket->encryptionMode() != KTcpSocket::SslClientMode
00189       || cipher.isNull() || cipher.usedBits() == 0) {
00190       kDebug() << "Initial SSL handshake failed. cipher.isNull() is" << cipher.isNull()
00191                     << ", cipher.usedBits() is" << cipher.usedBits()
00192                     << ", the socket says:" <<  m_socket->errorString()
00193                     << "and the list of SSL errors contains"
00194                     << m_socket->sslErrors().count() << "items.";
00195      KSslErrorUiData errorData(m_socket);
00196      emit sslError(errorData);
00197   } else {
00198     kDebug() << "TLS negotiation done.";
00199     m_encryptedMode = true;
00200     emit encryptionNegotiationResult(true, m_socket->negotiatedSslVersion());
00201   }
00202 }
00203 
00204 void SessionThread::sslErrorHandlerResponse(bool response)
00205 {
00206   QMutexLocker locker(&m_mutex);
00207   if (response) {
00208     m_encryptedMode = true;
00209     emit encryptionNegotiationResult(true, m_socket->negotiatedSslVersion());
00210   } else {
00211      m_encryptedMode = false;
00212      //reconnect in unencrypted mode, so new commands can be issued
00213      m_socket->disconnectFromHost();
00214      m_socket->waitForDisconnected();
00215      m_socket->connectToHost(m_hostName, m_port);
00216      emit encryptionNegotiationResult(false, KTcpSocket::UnknownSslVersion);
00217   }
00218 }
00219 
00220 #include "sessionthread_p.moc"
00221 

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