#pragma once
//
//tcp服務端-單線程處理客戶端連接
#include <QAbstractSocket>
#include <QObject>
 
class QTcpServer;
class SimpleTcpSocketServerDemo : public QObject
{ 
   
    Q_OBJECT
 
public:
    SimpleTcpSocketServerDemo();
 
private slots:
    void sendData();
    void displayError(QAbstractSocket::SocketError socketError);
 
private:
    QStringList m_oData;
    QTcpServer *m_pTcpServer;
};
 
void testSimpleTcpSocketServerDemo();

#include "SimpleTcpSocketServerDemo.h"
#include <assert.h>
#include <QTcpServer>
#include <QTcpSocket>
#include <QDebug>
#include <QDataStream>
SimpleTcpSocketServerDemo::SimpleTcpSocketServerDemo()
{ 
 
//初始換原始數據
m_oData << 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.");
//1. 創建TCP對象
m_pTcpServer = new QTcpServer(this);
//2. 新連接、錯誤信號
connect(m_pTcpServer, &QTcpServer::newConnection, this, &SimpleTcpSocketServerDemo::sendData);
connect(m_pTcpServer, &QTcpServer::acceptError, this, &SimpleTcpSocketServerDemo::displayError);
//3. 啟動服務端
if (!m_pTcpServer->listen(QHostAddress::Any, 8888))
{ 
 
qDebug() << "m_pTcpServer->listen() error";
assert(false);
}
}
void SimpleTcpSocketServerDemo::sendData()
{ 
 
//獲取服務端數據
QString sWriteData = m_oData.at(qrand() % m_oData.size());
//獲取與客戶端通信的socket
QTcpSocket* pClientConnection = m_pTcpServer->nextPendingConnection();
//從客戶端讀數據
QString sReadData = pClientConnection->readAll();
qDebug() << "SimpleTcpSocketServerDemo::readDataFromClient " << pClientConnection;
//與客戶端寫數據
qDebug() << "SimpleTcpSocketServerDemo::writeDataToClient " << sWriteData;
pClientConnection->write(sWriteData.toUtf8());
// //與客戶端斷開連接
// connect(pClientConnection, &QTcpSocket::disconnected, this, &SimpleTcpSocketServerDemo::deleteLater);
// pClientConnection->disconnectFromHost();
}
void SimpleTcpSocketServerDemo::displayError(QAbstractSocket::SocketError socketError)
{ 
 
qDebug() << "SimpleTcpSocketServerDemo::displayError " << socketError;
}
void testSimpleTcpSocketServerDemo()
{ 
 
//這樣寫會內存泄漏，如此寫方便測試。
SimpleTcpSocketServerDemo* pSimpleTcpSocketServer = new SimpleTcpSocketServerDemo;
}

#pragma once
//
//客戶端
#include <QObject>
#include <QAbstractSocket>
#include <QRunnable>
#include <QThreadPool>
class QTcpSocket;
class SimpleTcpSocketClientDemo : public QObject
{ 
 
Q_OBJECT
public:
SimpleTcpSocketClientDemo();
private slots:
void connected();
void readyRead();
void error(QAbstractSocket::SocketError socketError);
private:
QTcpSocket* m_pTcpSocket;
};
class ClientRunnable : public QRunnable
{ 
 
public:
void run();
};
void testSimpleTcpSocketClientDemo();

#include "SimpleTcpSocketClientDemo.h"
#include <QTcpSocket>
#include <QDebug>
SimpleTcpSocketClientDemo::SimpleTcpSocketClientDemo()
{ 
 
//1. 創建TCP套接字對象
m_pTcpSocket = new QTcpSocket(this);
//2. 已連接、數據可讀、失敗信號連接
connect(m_pTcpSocket, &QTcpSocket::connected, this, &SimpleTcpSocketClientDemo::connected);
connect(m_pTcpSocket, &QIODevice::readyRead, this, &SimpleTcpSocketClientDemo::readyRead);
typedef void (QAbstractSocket::*QAbstractSocketErrorSignal)(QAbstractSocket::SocketError);
connect(m_pTcpSocket, static_cast<QAbstractSocketErrorSignal>(&QTcpSocket::error), this, &SimpleTcpSocketClientDemo::error);
//3. 與服務器端建立連接
m_pTcpSocket->connectToHost("127.0.0.1", 8888);
//4. 同步處理-等待數據可讀
m_pTcpSocket->waitForReadyRead();
}
void SimpleTcpSocketClientDemo::readyRead()
{ 
 
qDebug() << "SimpleTcpSocketClientDemo::readyRead " << m_pTcpSocket->readAll();
}
void SimpleTcpSocketClientDemo::connected()
{ 
 
qDebug() << "SimpleTcpSocketClientDemo::connected successfully";
}
void SimpleTcpSocketClientDemo::error(QAbstractSocket::SocketError socketError)
{ 
 
qDebug() << "SimpleTcpSocketClientDemo::error " << socketError;
}
void ClientRunnable::run()
{ 
 
//這樣寫會內存泄漏，如此寫方便測試。
SimpleTcpSocketClientDemo* pSimpleTcpSocketClient = new SimpleTcpSocketClientDemo;
}
#define CLINET_COUNT 2000 //客戶端的數量
void testSimpleTcpSocketClientDemo()
{ 
 
QTime oTime;
oTime.start();
//同步線程池的方式模擬多個客戶端與服務器端交互
for (int nIndex = 0; nIndex < CLINET_COUNT; ++nIndex)
{ 
 
ClientRunnable* pRunnable = new ClientRunnable;
pRunnable->setAutoDelete(false);
QThreadPool::globalInstance()->start(pRunnable);
}
QThreadPool::globalInstance()->waitForDone(30 * 1000);
qDebug() << "connect count: " << CLINET_COUNT << "total time: " << (double)oTime.elapsed() / double(1000) << "s";
}

#pragma once
//
//服務器端-多線程處理客戶端連接
#include <QTcpServer>
#include <QThread>
class MultiThreadTcpSocketServerDemo : public QTcpServer
{ 
 
public:
MultiThreadTcpSocketServerDemo();
//This virtual function is called by QTcpServer when a new connection is available. 
//The socketDescriptor argument is the native socket descriptor for the accepted connection.
virtual void incomingConnection(qintptr handle);
private:
QStringList m_oData;
};
//處理線程
class ServerHandleThread : public QThread
{ 
 
Q_OBJECT
public:
ServerHandleThread(qintptr handle, const QString& sWriteData);
virtual void run();
private:
qintptr m_nHandle;
QString m_sWriteData;
};
void testMultiThreadTcpSocketServerDemo();

#include "MultiThreadTcpSocketServerDemo.h"
#include <QDebug>
#include <QTcpSocket>
MultiThreadTcpSocketServerDemo::MultiThreadTcpSocketServerDemo()
{ 
 
//初始換原始數據
m_oData << 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.");
}
void MultiThreadTcpSocketServerDemo::incomingConnection(qintptr handle)
{ 
 
//獲取服務端數據
QString sWriteData = m_oData.at(qrand() % m_oData.size());
qDebug() << "MultiThreadTcpSocketServerDemo::incomingConnection" << handle;
ServerHandleThread* pThread = new ServerHandleThread(handle, sWriteData);
connect(pThread, &ServerHandleThread::finished, pThread, &ServerHandleThread::deleteLater);
pThread->start();
}
ServerHandleThread::ServerHandleThread(qintptr handle, const QString& sWriteData)
:m_sWriteData(sWriteData), m_nHandle(handle)
{ 
 
}
void ServerHandleThread::run()
{ 
 
//1. 建立與客戶端通信的TCP套接字
QTcpSocket oTcpSocket;
if (!oTcpSocket.setSocketDescriptor(m_nHandle))
{ 
 
qDebug() << "oTcpSocket.setSocketDescriptor error";
return;
}
//2. 向客戶端寫數據
qDebug() << "MultiThreadTcpSocketServerDemo::readDataFromClient" << &oTcpSocket;
qDebug() << "MultiThreadTcpSocketServerDemo::writeDataToClient" << m_sWriteData;
oTcpSocket.write(m_sWriteData.toUtf8());
oTcpSocket.disconnectFromHost();
oTcpSocket.waitForDisconnected();
}
void testMultiThreadTcpSocketServerDemo()
{ 
 
//1. 建立服務器端套接字
MultiThreadTcpSocketServerDemo* m_pTcpServer = new MultiThreadTcpSocketServerDemo();
//2. 啟動服務端
if (!m_pTcpServer->listen(QHostAddress::Any, 8888))
{ 
 
qDebug() << "m_pTcpServer->listen() error";
}
}