Question

我在运行服务器程序时遇到运行时错误，尤其是在一个客户端也没有响应的情况下。我真的不明白为什么它也会影响服务器程序。我是Qt编程的初学者，我尽力在客户端和服务器程序中找到错误，但结果无济于事。这是我的中继服务器的代码。有谁可以帮我重新创建并检测出真正产生错误的是什么？我认为它与未闭合连接有关（例如，当关闭GPRS模块而没有关闭TCP连接或无响应程序时（例如，充当GPRS模块数据的接收器的其他客户端）。编码和解码过程确实有效。他们甚至可以通过中继服务器成功通信。但是我仍然想要摆脱真正的错误。我想从调试服务器程序开始。所以服务器程序接受连接并广播该消息到每个客户端连接（例如聊天服务器）

myrelayserver.h
#ifndef MYRELAYSERVER_H
#define MYRELAYSERVER_H

#include <QObject>
#include <QDebug>
#include <QTcpServer>
#include <QTcpSocket>
#include <QList>
#include <QListIterator>
#include "mysocket.h"
#include <QObject>
#include <QTimer>

class MyRelayServer : public QObject
{
    Q_OBJECT
public:
    explicit MyRelayServer(QObject *parent = 0);

public slots:
    void newConnection();
    void disconnected(QTcpSocket* socket);
    void broadcastMessage(QTcpSocket* socket);
private:
    QTcpServer *mServer;
    QList<QTcpSocket*> mList;

};

#endif // MYRELAYSERVER_H

myrelayserver.cpp

#include "myrelayserver.h"

MyRelayServer::MyRelayServer(QObject *parent) :
    QObject(parent)
{
    mServer = new QTcpServer(this);

    connect(mServer,SIGNAL(newConnection()),this,SLOT(newConnection()));

    if(!mServer->listen(QHostAddress::AnyIPv4,9998))
    {
        qDebug() << "Failed to open port.";
    }
    else
    {
        qDebug() << "Server Started";
    }

}

void MyRelayServer::newConnection()
{
    MySocket * socket = new MySocket(this);
    socket->mSocket = mServer->nextPendingConnection();
    socket->mSocket->write("hello client\r\n");
    socket->mSocket->flush();
    socket->mSocket->waitForBytesWritten(3000);
    mList.append(socket->mSocket);
    connect(socket->mSocket, SIGNAL(readyRead()), socket, SLOT(readyRead()));
    connect(socket, SIGNAL(emitSocket(QTcpSocket*)), this, SLOT(broadcastMessage(QTcpSocket*)));
    connect(socket->mSocket, SIGNAL(disconnected()), socket, SLOT(disconnected()));
    connect(socket, SIGNAL(emit2Socket(QTcpSocket*)), this, SLOT(disconnected(QTcpSocket*)));

    qDebug() << "\a\a\aNumber of Clients: " << mList.size();
}

void MyRelayServer::disconnected(QTcpSocket* socket){

    QMutableListIterator<QTcpSocket*> i(mList);
    QTcpSocket * ptr;
    while(i.hasNext()){
        ptr = i.next();
        if (ptr == socket){
            i.remove();
            break;
        }
    }
    qDebug() << "\a\a\aNumber of Clients: " << mList.size();
    delete socket;
}

void MyRelayServer::broadcastMessage(QTcpSocket * socket)
{
    QByteArray stream = socket->readAll();
    QListIterator<QTcpSocket*> i(mList);
    QTcpSocket * ptr;
    while(i.hasNext()){
        ptr = i.next();
        if (ptr != socket){
            ptr->write(stream);
            ptr->flush();
        }
    }
}

mysocket.h
#ifndef MYSOCKET_H
#define MYSOCKET_H

#include <QObject>
#include <QTcpSocket>
class MySocket : public QObject
{
    Q_OBJECT
public:
    explicit MySocket(QObject *parent = 0);
    QTcpSocket * mSocket;

signals:
    void emitSocket(QTcpSocket * socket);
    void emit2Socket(QTcpSocket * socket);
public slots:
    void readyRead();
    void disconnected();


};

#endif // MYSOCKET_H

mysocket.cpp
#include "mysocket.h"
MySocket::MySocket(QObject *parent) :
    QObject(parent)
{
    mSocket = new QTcpSocket(this);
}

void MySocket::readyRead()
{
    emit emitSocket(mSocket);
}

void MySocket::disconnected()
{
    emit emit2Socket(mSocket);
}

main.cpp
#include <QCoreApplication>
#include "myrelayserver.h"
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    qDebug() << "**********************************************\Relay Server\n\n**********************************************";
    MyRelayServer server;
    return a.exec();
}

使用Qt C ++在中继服务器程序中运行时错误

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