QT QTcpServer::incomingConnection(Qintpttr句柄)未触发?
我第一次尝试使用Qt创建一个多线程服务器。通常情况下,在套接字句柄已经烘焙的情况下,可以使用QT QTcpServer::incomingConnection(Qintpttr句柄)未触发?,qt,sockets,tcp,Qt,Sockets,Tcp,我第一次尝试使用Qt创建一个多线程服务器。通常情况下,在套接字句柄已经烘焙的情况下,可以使用qtcserver::nextPendingConnection()返回的套接字指针,但由于我在单独的线程上与连接客户端进行接口,因此我需要使用qtcserver::incomingConnection中的qintptr句柄单独创建套接字(Qintpttr handle)。在一个非常沉闷、充满错误的调试会话之后,我设法将问题追踪到qtcserver::incomingConnection()从未被触发 有
qtcserver::nextPendingConnection()
返回的套接字指针,但由于我在单独的线程上与连接客户端进行接口,因此我需要使用qtcserver::incomingConnection中的qintptr句柄
单独创建套接字(Qintpttr handle)。在一个非常沉闷、充满错误的调试会话之后,我设法将问题追踪到qtcserver::incomingConnection()
从未被触发
有人有过类似的问题吗?在最近的Qt版本中有什么变化吗
这些是我尝试过的:
qtcserver::输入连接(qintptr句柄)
QTcpServer::incomingConnection(Qintpttr socketDescriptor)
qtcserver::incomingConnection(int句柄)
TestServer *myServer = new TestServer();
myServer->initializeServer(1234);
这要求:
void TestServer::initializeServer(quint16 port)
{
mainServer = new QTcpServer(this);
mainServer->listen(QHostAddress::Any, port);
qDebug() << "Listening for connections on port: " << port;
}
void TestClient::setSocket(quint16 socketDescr)
{
socket = new QTcpSocket(this);
socket->setSocketDescriptor(socketDescr);
connect(socket, SIGNAL(connected()),this,SLOT(connected()));
connect(socket, SIGNAL(disconnected()),this,SLOT(disconnected()));
connect(socket, SIGNAL(readyRead()),this,SLOT(readyRead()));
}
这要求:
void TestServer::initializeServer(quint16 port)
{
mainServer = new QTcpServer(this);
mainServer->listen(QHostAddress::Any, port);
qDebug() << "Listening for connections on port: " << port;
}
void TestClient::setSocket(quint16 socketDescr)
{
socket = new QTcpSocket(this);
socket->setSocketDescriptor(socketDescr);
connect(socket, SIGNAL(connected()),this,SLOT(connected()));
connect(socket, SIGNAL(disconnected()),this,SLOT(disconnected()));
connect(socket, SIGNAL(readyRead()),this,SLOT(readyRead()));
}
在connect()信号上调用:
void TestClient::connected()
{
qDebug()您的代码中有一些错误:
在TestServer
上,您的qtcserver
可能已聚合,但您需要继承它。在这种情况下,您尝试重写incomingConnection()
方法,但您没有基类,只需创建新的incomingConnection()
,而不是重写
您可以从incomingConnection()
中获取qintptpr描述符
变量,但可以在setSocket()
方法中设置quint16
类型
您可能混合了服务器的客户端和您的部分的客户端,它们只是获取传入连接和处理套接字数据
我在下面写一些小例子,让您了解tcp客户机-服务器通信
服务器部分
主要部分是服务器本身:
#include <QTcpServer>
class TestServer: public QTcpServer
{
public:
TestServer(QObject *parent = 0);
void incomingConnection(qintptr handle) Q_DECL_OVERRIDE;
};
然后覆盖incomingConnection()
的时间:
我们继承了用于使服务器多线程的方法,因此必须重写该方法:
在onReadyRead()
上,只需从客户端读取一些QString
,将其写入控制台并断开与主机的连接。在onDisconnected()
上,我们套接字连接并退出事件循环
void SocketThread::onReadyRead()
{
QDataStream in(m_socket);
in.setVersion(QDataStream::Qt_5_5);
QString message;
in >> message;
qDebug() << message;
m_socket->disconnectFromHost();
}
void SocketThread::onDisconnected()
{
m_socket->close();
// Exit event loop
quit();
}
客户端部分
这只是一个示例和不良气味样式,但我在QPushButton::clicked上的main窗口
class上创建了与服务器的连接
signal:
void MainWindow::on_pushButton_clicked()
{
QTcpSocket *client = new QTcpSocket;
connect(client, SIGNAL(connected()), this, SLOT(connected()));
connect(client, SIGNAL(disconnected()), client, SLOT(deleteLater()));
client->connectToHost(QHostAddress::LocalHost, 2323);
client->waitForConnected();
if (client->state() != QAbstractSocket::ConnectedState ) {
qDebug() << Q_FUNC_INFO << " can't connect to host";
delete client;
return;
}
QByteArray block;
QDataStream out(&block, QIODevice::WriteOnly);
out.setVersion(QDataStream::Qt_5_5);
out << QString("Hello");
out.device()->seek(0);
client->write(block);
}
void MainWindow::connected()
{
qDebug() << Q_FUNC_INFO << " client connected";
}
void主窗口::在按钮上点击()
{
QTcpSocket*客户端=新的QTcpSocket;
连接(客户端,信号(已连接()),此,插槽(已连接());
连接(客户端、信号(断开连接())、客户端、插槽(删除稍后的());
客户端->连接到主机(QHostAddress::LocalHost,2323);
客户端->waitForConnected();
如果(客户端->状态()!=QAbstractSocket::ConnectedState){
qDebug()请附加一些您得到的代码错误您是否重新实现了子类QTcpServerQTcpServer::incomingConnection())
?查看线程化财富服务器的示例:是的,我已经对其进行了子类化并重新实现了它-我没有像财富服务器示例中那样添加Q\u DECLARE\u OVERRIDE宏。我将对此进行一次尝试并进行报告。~~我没有像财富服务器示例中那样添加Q\u DECLARE\u OVERRIDE宏。我将对此进行一次尝试并进行报告~~-即使使用Q_DECL_OVERRIDE,仍然无法工作。@t3ft3l--i如果按照您的建议实现,但incommingConnection()
从未被触发,原因是什么?@user3085931请确保:1)您的服务器启动正确2)客户端使用正确的ip/端口连接到服务器3)某些防火墙或防病毒软件没有阻止客户端和服务器之间的网络通信。在服务器端很难出错-实现非常简单明了。我想,您在客户端连接或防火墙/防病毒软件方面遇到了一些问题美国blockers@t3ft3l--我知道服务器正在监听正确的端口和任何IP。客户端本身能够连接(根据信号(connected())
),这是一种奇怪的行为
#include <QThread>
#include <QObject>
class QTcpSocket;
class SocketThread: public QThread
{
Q_OBJECT
public:
SocketThread(qintptr descriptor, QObject *parent = 0);
~SocketThread();
protected:
void run() Q_DECL_OVERRIDE;
private slots:
void onConnected();
void onReadyRead();
void onDisconnected();
private:
QTcpSocket *m_socket;
qintptr m_descriptor;
};
SocketThread::SocketThread(qintptr descriptor, QObject *parent)
: QThread(parent), m_descriptor(descriptor)
{
}
void SocketThread::run()
{
qDebug() << Q_FUNC_INFO;
m_socket = new QTcpSocket;
m_socket->setSocketDescriptor(m_descriptor);
connect(m_socket, SIGNAL(readyRead()), this, SLOT(onReadyRead()), Qt::DirectConnection);
connect(m_socket, SIGNAL(disconnected()), this, SLOT(onDisconnected()), Qt::DirectConnection);
exec();
}
void SocketThread::onReadyRead()
{
QDataStream in(m_socket);
in.setVersion(QDataStream::Qt_5_5);
QString message;
in >> message;
qDebug() << message;
m_socket->disconnectFromHost();
}
void SocketThread::onDisconnected()
{
m_socket->close();
// Exit event loop
quit();
}
void MainWindow::on_pushButton_clicked()
{
QTcpSocket *client = new QTcpSocket;
connect(client, SIGNAL(connected()), this, SLOT(connected()));
connect(client, SIGNAL(disconnected()), client, SLOT(deleteLater()));
client->connectToHost(QHostAddress::LocalHost, 2323);
client->waitForConnected();
if (client->state() != QAbstractSocket::ConnectedState ) {
qDebug() << Q_FUNC_INFO << " can't connect to host";
delete client;
return;
}
QByteArray block;
QDataStream out(&block, QIODevice::WriteOnly);
out.setVersion(QDataStream::Qt_5_5);
out << QString("Hello");
out.device()->seek(0);
client->write(block);
}
void MainWindow::connected()
{
qDebug() << Q_FUNC_INFO << " client connected";
}