我的编译环境VS2005 ，QT-4.3.5.。按手册中的server、client例子写了两个程序，编译通过了。但是运行后就是通讯不上。
在client.cpp中设置断点，无法监视readFortune()的运行，我想是不是根本没有监视到readyRead（）信号？
请各位大侠指点一下，不甚感激！
在控制台上使用netstat -a 可以看到已经建立了连接。程序代码如下：
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// server.h
//
#ifndef TEXTSERVER_H
#define TEXTSERVER_H
#include <QtGui/QMainWindow>
#include "ui_textserver.h"
#include <QtNetwork/QTcpServer>
class textServer : public QMainWindow
{
Q_OBJECT
public:
textServer(QWidget *parent = 0, Qt::WFlags flags = 0);
~textServer();
private:
Ui::textServerClass ui;
QTcpServer *tcpServer;
QStringList fortunes;
private slots:
void sendFortune();
};
#endif // TEXTSERVER_H
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// server.cpp
//
#include "textserver.h"
#include <QtNetwork/QtNetwork>
#include <QtGui/QMessageBox>
textServer::textServer(QWidget *parent, Qt::WFlags flags)
: QMainWindow(parent, flags)
{
ui.setupUi(this);
tcpServer = new QTcpServer(this);
if (!tcpServer->listen()) {
QMessageBox::critical(this, tr("Fortune Server"),
tr("Unable to start the server: %1.")
.arg(tcpServer->errorString()));
close();
return;
}
ui.statusLabel->setText(tr("The server is running on port %1.\n"
"Run the Fortune Client example now.")
.arg(tcpServer->serverPort()));
fortunes << tr("You've been leading a dog's life. Stay off the furniture.")
<< tr("You've got to think about tomorrow.")
<< tr("You will be surprised by a loud noise.")
<< tr("You will feel hungry again in another hour.")
<< tr("You might have mail.")
<< tr("You cannot kill time without injuring eternity.")
<< tr("Computers are not intelligent. They only think they are.");
QObject::connect(ui.quitButton, SIGNAL(clicked()), this, SLOT(close()));
QObject::connect(tcpServer, SIGNAL(newConnection()), this, SLOT(sendFortune()));
}
textServer::~textServer()
{
}
void textServer::sendFortune()
{
QByteArray block;
QDataStream out(&block, QIODevice::WriteOnly);
out.setVersion(QDataStream::Qt_4_3);
out << (quint16)0;
out << fortunes.at(qrand() % fortunes.size());
out.device()->seek(0);
out << (quint16)(block.size() - sizeof(quint16));
QTcpSocket *clientConnection = tcpServer->nextPendingConnection();
QObject::connect(clientConnection, SIGNAL(disconnected()),
clientConnection, SLOT(deleteLater()));
clientConnection->write(block);
clientConnection->disconnectFromHost();
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// clinet.h
///
#ifndef TEXTCLIENT_H
#define TEXTCLIENT_H
#include <QtGui/QMainWindow>
#include "ui_textclient.h"
#include <QtNetwork/QTcpServer>
class QDialogButtonBox;
class QLabel;
class QLineEdit;
class QPushButton;
class QTcpSocket;
class textClient : public QMainWindow
{
Q_OBJECT
public:
textClient(QWidget *parent = 0, Qt::WFlags flags = 0);
~textClient();
private:
Ui::textClientClass ui;
QTcpSocket *tcpSocket;
QString currentFortune;
quint16 blockSize;
private slots:
void requestNewFortune();
void readFortune();
void displayError(QAbstractSocket::SocketError socketError);
void enableGetFortuneButton();
};
#endif // TEXTCLIENT_H
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// client.cpp
//
#include "textclient.h"
#include <QtNetwork/QtNetwork>
#include <QtGui/QMessageBox>
#include <QtCore/QObject>
textClient::textClient(QWidget *parent, Qt::WFlags flags)
: QMainWindow(parent, flags)
{
ui.setupUi(this);
tcpSocket = new QTcpSocket(this);
QObject::connect(ui.hostlineEdit, SIGNAL(textChanged(const QString &)),
this, SLOT(enableGetFortuneButton()));
QObject::connect(ui.portlineEdit, SIGNAL(textChanged(const QString &)),
this, SLOT(enableGetFortuneButton()));
QObject::connect(ui.getFortuneButton, SIGNAL(clicked()),
this, SLOT(requestNewFortune()));
QObject::connect(ui.quitButton, SIGNAL(clicked()), this, SLOT(close()));
QObject::connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(readFortune()));
QObject::connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)),
this, SLOT(displayError(QAbstractSocket::SocketError)));
}
textClient::~textClient()
{
}
void textClient::requestNewFortune()
{
ui.getFortuneButton->setEnabled(false);
blockSize = 0;
tcpSocket->abort();
tcpSocket->connectToHost(ui.hostlineEdit->text(),
ui.portlineEdit->text().toInt());
ui.statusLabel->setText(tr("debug!"));
}
void textClient::readFortune()
{
QDataStream in(tcpSocket);
in.setVersion(QDataStream::Qt_4_3);
if (blockSize == 0) {
if (tcpSocket->bytesAvailable() < (int)sizeof(quint16))
return;
in >> blockSize;
}
if (tcpSocket->bytesAvailable() < blockSize)
return;
QString nextFortune;
in >> nextFortune;
if (nextFortune == currentFortune) {
QTimer::singleShot(0, this, SLOT(requestNewFortune()));
return;
}
currentFortune = nextFortune;
ui.statusLabel->setText(currentFortune);
ui.getFortuneButton->setEnabled(true);
}
void textClient::displayError(QAbstractSocket::SocketError socketError)
{
switch (socketError) {
case QAbstractSocket::RemoteHostClosedError:
break;
case QAbstractSocket::HostNotFoundError:
QMessageBox::information(this, tr("Fortune Client"),
tr("The host was not found. Please check the "
"host name and port settings."));
break;
case QAbstractSocket::ConnectionRefusedError:
QMessageBox::information(this, tr("Fortune Client"),
tr("The connection was refused by the peer. "
"Make sure the fortune server is running, "
"and check that the host name and port "
"settings are correct."));
break;
default:
QMessageBox::information(this, tr("Fortune Client"),
tr("The following error occurred: %1.")
.arg(tcpSocket->errorString()));
}
ui.getFortuneButton->setEnabled(true);
}
void textClient::enableGetFortuneButton()
{
ui.getFortuneButton->setEnabled(!ui.hostlineEdit->text().isEmpty() && !ui.portlineEdit->text().isEmpty());
//ui.getFortuneButton->setEnabled(!ui.hostlineEdit->text().isEmpty()
// && !ui.portlineEdit->text().isEmpty());
}
