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Thread: How I can get the message from client

  1. 3rd September 2007, 15:44 #1
    mraittin
    mraittin is offline Beginner
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    Default How I can get the message from client

    How can i get reading the message from client,Sorry My English
    I was using this example http://wiki.qtcentre.org/index.php?title=Simple_Chat

    Server.cpp
    Qt Code: 
    1. connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
    2.     connect(tcpServer, SIGNAL(newConnection()), this, SLOT(sendFortune()));
    3.  
    4.     QHBoxLayout *buttonLayout = new QHBoxLayout;
    5.     buttonLayout->addStretch(1);
    6.     buttonLayout->addWidget(quitButton);
    7.     buttonLayout->addStretch(1);
    8.  
    9.  
    10.     QVBoxLayout *mainLayout = new QVBoxLayout;
    11.     mainLayout->addWidget(statusLabel);
    12.     mainLayout->addLayout(buttonLayout);
    13.     setLayout(mainLayout);
    14.  
    15.     setWindowTitle(tr("Fortune Server"));
    16. }
    17.  
    18. void Server::sendFortune()
    19. {
    20.      QTcpSocket *tcpSocket = tcpServer->nextPendingConnection();
    21.  
    22.         connections.append(tcpSocket);
    23. 	QBuffer* buffer = new QBuffer(this);
    24. 	buffer->open(QIODevice::ReadWrite);
    25. 	buffers.insert(tcpSocket, buffer);
    26.  
    28. 	out.setDevice(tcpSocket);
    29. 	QString tiedosto=haeTiedosto(kuvaIndex);
    30.        QFile file(tiedosto);
    31. 	file.open(QIODevice::ReadOnly);
    33. 	fstr.setDevice(&file);
    34.  
    35.  
    36.     file.seek(0);
    37. 	char* data = new char[65536];
    38. 	while(!file.atEnd()) 
    39. 	{
    40. 		int read = fstr.readRawData(data, 65536);
    41. 		int sent = out.writeRawData(data, read);
    42. 	}
    43.  
    44. 	delete[] data;
    45.  
    46. 	tcpSocket->waitForBytesWritten();
    47.  
    48.  
    49.  
    50.     connect(tcpSocket, SIGNAL(readyRead()),	SLOT(receiveMessage()));
    51.     connect(tcpSocket, SIGNAL(disconnected()), SLOT(removeConnection()));
    52.  
    53.  
    54. }
    55. void Server::removeConnection()
    56. {
    57.  
    58.     QTcpSocket* socket = static_cast<QTcpSocket*>(sender());
    59. 	QBuffer* buffer = buffers.take(socket);
    60. 	buffer->close();
    61. 	buffer->deleteLater();
    62. 	connections.removeAll(socket);
    63. 	socket->deleteLater();
    64.  
    65.  
    66.  
    67.  
    68. }
    69.  
    70. void Server::receiveMessage()
    71. {
    72.  
    73. 	QTcpSocket* socket = static_cast<QTcpSocket*>(sender());
    74. 	QBuffer* buffer = buffers.value(socket);
    75.  
    76. 	// missing some checks for returns values for the sake of simplicity
    77. 	qint64 bytes = buffer->write(socket->readAll());
    78. 	// go back as many bytes as we just wrote so that it can be read
    79. 	buffer->seek(buffer->pos() - bytes);
    80. 	// read only full lines, line by line
    81. 	while (buffer->canReadLine())
    82. 	{
    83. 		QByteArray line = buffer->readLine();
    84. 		foreach (QTcpSocket* tcpSocket, connections)
    85. 		{
    86.         int d=line.toInt();
    87.         QString data=data.setNum(d);
    88. 	    statusLabel->setText(data);
    89.      }
    90.  
    91.     }
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  2. 3rd September 2007, 16:27 #2
    marcel
    marcel is offline Expert
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    Default Re: How I can get the message from client

    You should implement it as the receiving part is implemented in the client. No big differences. But you'll have to modify the client too, to be able to send data.

    Regards
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  3. 7th September 2007, 13:41 #3
    mraittin
    mraittin is offline Beginner
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    Default Re: How I can get the message from client

    Qt Code: 
    1. #include <QtGui> 
    2. #include <QImage>
    3. #include "kuvaclient.h"
    4.  
    5.  
    6. // including <QtGui> saves us to include every class user, <QString>, <QFileDialog>,...
    7.  
    8. KuvaClient::KuvaClient(QDialog *parent)
    9. {
    10. 	setupUi(this); // this sets up GUI
    11.  
    12. 	tcpSocket = new QTcpSocket(this);
    13. 	sockStream = new QDataStream(tcpSocket);
    14. 	file = new QFile("testi.bmp");
    15. 	if(file->exists())
    16. 		file->remove();
    17. 	file->open(QIODevice::ReadWrite);
    18.  
    19.     numberFrame=0;
    20.     fileStream = new QDataStream(file);
    21.     tcpSocket->abort();
    22.     tcpSocket->connectToHost("masa",1200);
    23. 	connect(vasen, SIGNAL( clicked() ), this, SLOT( Vasenpaina()));
    24. 	connect(oikea, SIGNAL( clicked() ), this, SLOT( Oikeapaina()));
    25.     connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(readImage()));
    26.  
    27.     connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)),
    28.             this, SLOT(displayError(QAbstractSocket::SocketError)));
    29. }
    30.  
    31. void KuvaClient::Vasenpaina()
    32. {
    33.  
    34.     tcpSocket->abort();
    35.    tcpSocket->connectToHost("localhost",1200);
    36.    numberFrame=numberFrame+1;
    37.    QString number=number.setNum(numberFrame);
    38.    //koe->setText(number);
    39.  
    40.     tcpSocket->write(number);
    41.  
    42.  
    43.  
    44.  
    45. }
    46. void KuvaClient::readImage()
    47. {
    48.  
    49. 		//tcpSocket->seek(0);
    50. 	char *buffer = new char[65536];
    51. 	//int count = tcpSocket->bytesAvailable();
    52. 	//sockStream->resetStatus();
    53. 	while(!sockStream->atEnd())
    54. 	{
    55. 		int src = sockStream->readRawData(buffer, 65536);
    56. 		int rcv = fileStream->writeRawData(buffer, src);
    57. 		int xxx = 0;
    58. 		xxx++;
    59. 	}
    60.  
    61. 	delete[] buffer;
    62. 	file->flush();
    63.    	QImage someimage("testi.bmp");
    64.     QPixmap preview; 
    65.     preview = preview.fromImage(someimage);
    66.  
    67.     label->setPixmap(preview); 
    68. 	tcpSocket->waitForBytesWritten();
    69.  
    70.  
    71. }
    72. void KuvaClient::Oikeapaina()
    73. {
    74.  
    75.  
    76.    	tcpSocket->abort();
    77.     tcpSocket->connectToHost("locahost",1200);
    78.        numberFrame++;
    79.    	/*QString number=number.setNum(numberFrame);
    80.     tcpSocket->write(number.toLatin1() );
    81. 	tcpSocket->deleteLater();
    82. */
    83.  
    84. }
    85. void KuvaClient::displayError(QAbstractSocket::SocketError socketError)
    86. {
    87.     switch (socketError) {
    88.     case QAbstractSocket::RemoteHostClosedError:
    89.         break;
    90.     case QAbstractSocket::HostNotFoundError:
    91.         QMessageBox::information(this, tr("Fortune Client"),
    92.                                  tr("The host was not found. Please check the "
    93.                                     "host name and port settings."));
    94.         break;
    95.     case QAbstractSocket::ConnectionRefusedError:
    96.         QMessageBox::information(this, tr("Fortune Client"),
    97.                                  tr("The connection was refused by the peer. "
    98.                                     "Make sure the fortune server is running, "
    99.                                     "and check that the host name and port "
    100.                                     "settings are correct."));
    101.         break;
    102.     default:
    103.         QMessageBox::information(this, tr("Fortune Client"),
    104.                                  tr("The following error occurred: %1.")
    105.                                  .arg(tcpSocket->errorString()));
    106.     }
    107.  
    108.  
    109. }
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    This is my client code.It' writes message to server,but i can't read message from socket in the server side.
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