基于tcp协议的网络聊天室

班级：软件113 姓名：蒋栋学号：1108050328 成绩：

实验名称: 基于TCP的网络聊天室

1.实验目的：

掌握TCP通讯协议、掌握QTcpSocket

2.实验内容：

使用Qt的QtcpSocket实现简单的网络聊天程序，范例如图：

包括拂去其程序和客户端程序，服务端程序可以创建一个聊天室，客户端程序可以输入登陆的用户名、服务器地址以及使用的端口号，然后进入聊天室，聊天室中的每一位用户均可以看见发布的信息。3.实验方法：

使用Qt的QtcpSocket，参考Qt网络编程实验。

4.实验过程

tcpServer端代码:

#include "dialog.h"

#include "ui_dialog.h"

Dialog::Dialog(QWidget *parent) :

QDialog(parent),

ui(new Ui::Dialog)

{

ui->setupUi(this);

ui->lineEdit->setText("8010");

port=8010;

}

Dialog::~Dialog()

{

delete ui;

}

void Dialog::on_newchat_clicked()

{

server=new Server(this,port);

connect(server,SIGNAL(updateServer(QString,int)),this,SLOT(updateServer(QString ,int)));

ui->newchat->setEnabled(false);

}

void Dialog::updateServer(QString msg,int length)

{

ui->listWidget->addItem (msg.left(length) );

}

tcpServer端server.cpp 代码:

#include "server.h"

#include

Server::Server(QObject*parent,int port)

:QTcpServer(parent)

{

listen(QHostAddress::Any,port);

}

void Server::incomingConnection(int socketDescriptor)

{

TcpclientSocket*tcpClientSocket=new TcpclientSocket(this);

connect(tcpClientSocket,SIGNAL(updateClient(QString,int)),this,SLOT(updateClient (QString,int)));

connect(tcpClientSocket,SIGNAL(disconnected(int)),this,SLOT(slotDisconnected(int )));

tcpClientSocket->setSocketDescriptor(socketDescriptor);

tcpClientSocketList.append(tcpClientSocket);

}

void Server::updateClient(QString msg, int length)

{

emit updateServer(msg,length);

for(int i=0;i

{

QTcpSocket*item=tcpClientSocketList.at(i);

if(item->write(msg.toLatin1(),length)!=length)

{continue ;};

}

}

void Server::slotDisconnected(int descriptor)

{

for(int i=0;i

{

QTcpSocket*item=tcpClientSocketList.at(i);

if(item->socketDescriptor()==descriptor)

{

tcpClientSocketList.removeAt(i);

return;

}

}

return;

}

Tcpclient端代码：

#include "dialog.h"

#include "ui_dialog.h"

#include

Dialog::Dialog(QWidget *parent) :

QDialog(parent),

ui(new Ui::Dialog)

{

ui->setupUi(this);

ui->lineEdit_4->setText("8010");

status=false;

serverIP =new QHostAddress();

port = 8010;

ui->pb_send->setEnabled(false);

}

Dialog::~Dialog()

{

delete ui;

}

void Dialog::on_pb_send_clicked()

{

slotSend();

}

void Dialog::on_pb_enter_clicked()

{

slotEnter();

}

void Dialog::slotEnter()

{

if(!status)

{

QString ip=ui->lineEdit_3->text();

if(!serverIP->setAddress(ip))

{

QMessageBox::information(this,tr("error"),tr("server ip address error!"));

return;

}

if(ui->LineEditUser->text()=="")

{

QMessageBox::information(this,tr("error"),tr("User name error!"));

return ;

}

userName=ui->LineEditUser->text();

tcpSocket = new QTcpSocket(this);

connect(tcpSocket,SIGNAL(connected()),this,SLOT(slotConnected())); connect(tcpSocket,SIGNAL(disconnected()),this,SLOT(slotDisconnected()));

connect(tcpSocket, SIGNAL(readyRead()),this, SLOT(dataReceived()));

tcpSocket->connectToHost ( *serverIP, port);

status=true;

}

else

{

int length = 0;

QString msg=userName+tr(":Leave Chat Room");

if((length=tcpSocket->write(msg.toLatin1(),msg.length()))!=msg.length())

{

return ;

}

tcpSocket->disconnectFromHost();

status=false;

}

}

void Dialog::slotConnected()

{

int length = 0;

ui->pb_send->setEnabled( true );

ui->pb_enter->setText(tr("Leave"));

QString msg=userName+tr(":Enter Chat Room");

if((length=tcpSocket->write(msg.toLatin1(),msg.length()))!=msg.length())

{

return;

}

}

void Dialog::slotDisconnected()

{

ui->pb_send->setEnabled( false );

ui->pb_enter->setText(tr("Enter"));

}

void Dialog::slotSend()

{

if(ui->LineEditSend->text()=="")

{

return ;

}

QString msg=userName+":"+ui->LineEditSend->text();

tcpSocket->write(msg.toLatin1(),msg.length());

ui->LineEditSend->clear();

}

void Dialog::dataReceived()

{

while (tcpSocket->bytesAvailable()>0)

{

QByteArray datagram;

datagram.resize(tcpSocket->bytesAvailable());

tcpSocket->read(datagram.data(), datagram.size());

QString msg=datagram.data();

ui->listWidget->addItem (msg.left(datagram.size()));

}

}

5.实验结果

客户端1 服务器端客户端2

6.实验总结

经过本次实验练习了TCP通讯协议、QTcpSocket 的使用。基本掌握了它们的使用。服务端程序可以创建一个聊天室，客户端程序可以输入登陆的用户名、服务器地址以及使用的端口号，然后进入聊天室，聊天室中的每一位用户均可以看见发布的信息。本次实验测试环境为本机。首先要给本机设置ip地址。另外程序中要注意端口的赋值。

7.教师评语