【QT篇】网络调试助手

一、项目概述

1.功能介绍

•支持开启服务端监听，客户端连接

•支持客户端、服务端收发消息

•支持多客户端连接服务端

2.界面预览

二、常用类 

在此主要罗列一些主要使用的类，具体请查阅QT帮助手册

•QTcpServer
•QTcpSocket
•QNetworkInterface
•QHostAddress
•QMouseEvent
•QTextCharFormat

三、项目源码

https://gitee.com/GeekerGao/network-debugging-assistant

部分代码

server

#include "widget.h"
#include "ui_widget.h"

#include <QMessageBox>
#include <QNetworkInterface>
#include <QTcpSocket>

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    this->setLayout(ui->verticalLayout);

    server = new QTcpServer(this);

    connect(ui->comboBoxChildren,&MyComboBox::on_ComboBox_clicked,this,&Widget::mComboBox_refresh);
    connect(server,SIGNAL(newConnection()),this,SLOT(on_newClient_connect()));
    ui->btnApart->setEnabled(false);
    ui->btnStopListen->setEnabled(false);
    ui->btnSend->setEnabled(false);

    QList<QHostAddress> address = QNetworkInterface::allAddresses();
    for(QHostAddress tmp : address){
        if(tmp.protocol() == QAbstractSocket::IPv4Protocol){
            ui->comboBoxAddr->addItem(tmp.toString());
        }
    }
}

Widget::~Widget()
{
    delete ui;
}

void Widget::on_newClient_connect()
{
    if(server->hasPendingConnections()){
        QTcpSocket* connection = server->nextPendingConnection();
        ui->textEditRev->insertPlainText("客户端地址:"+connection->peerAddress().toString()
                                         +"\n客户端端口号:"+QString::number(connection->peerPort())+"\n");
        connect(connection,SIGNAL(readyRead()),this,SLOT(on_readyRead_handler()));
        connect(connection,SIGNAL(stateChanged(QAbstractSocket::SocketState)),
                this,SLOT(mstateChanged(QAbstractSocket::SocketState)));
        ui->comboBoxChildren->addItem(QString::number(connection->peerPort()));
        ui->comboBoxChildren->setCurrentText(QString::number(connection->peerPort()));
        if(!ui->btnSend->isEnabled()){
            ui->btnSend->setEnabled(true);
        }
    }
}

void Widget::on_btnListen_clicked()
{
    int port = ui->lineEditPort->text().toInt();
    if(!server->listen(QHostAddress(ui->comboBoxAddr->currentText()),port)){
        QMessageBox msgBox;
        msgBox.setWindowTitle("监听失败");
        msgBox.setText("端口号被占用");
        msgBox.exec();
        return;
    }
    ui->btnListen->setEnabled(false);
    ui->btnApart->setEnabled(true);
    ui->btnStopListen->setEnabled(true);
}

void Widget::on_readyRead_handler()
{
    QTcpSocket *tmpSock = qobject_cast<QTcpSocket *>(sender());
    QByteArray revData = tmpSock->readAll();
    ui->textEditRev->moveCursor(QTextCursor::End);
    ui->textEditRev->ensureCursorVisible();
    ui->textEditRev->insertPlainText("客户端:"+revData+"\n");
}

void Widget::mdisconnected()
{
    QTcpSocket *tmpSock = qobject_cast<QTcpSocket *>(sender());

    ui->textEditRev->insertPlainText("客户端断开!\n");
    tmpSock->deleteLater();
}

void Widget::mstateChanged(QAbstractSocket::SocketState socketState)
{
    int tmpIndex;
    QTcpSocket *tmpSock = qobject_cast<QTcpSocket *>(sender());
    switch(socketState){
    case QAbstractSocket::UnconnectedState:
        ui->textEditRev->insertPlainText("客户端断开!\n");
        tmpIndex = ui->comboBoxChildren->findText(QString::number(tmpSock->peerPort()));
        ui->comboBoxChildren->removeItem(tmpIndex);
        tmpSock->deleteLater();
        if(ui->comboBoxChildren->count() == 0)
            ui->btnSend->setEnabled(false);
        break;
    case QAbstractSocket::ConnectedState:
    case QAbstractSocket::ConnectingState:
        ui->textEditRev->insertPlainText("客户端接入！");
        break;
    }
}

void Widget::mComboBox_refresh()
{
    ui->comboBoxChildren->clear();
    QList<QTcpSocket*> tcpSocketClients = server->findChildren<QTcpSocket*>();
    for(QTcpSocket* tmp : tcpSocketClients){
        if(tmp != nullptr)
            ui->comboBoxChildren->addItem(QString::number(tmp->peerPort()));
    }
    ui->comboBoxChildren->addItem("All");
}

void Widget::on_btnSend_clicked()
{
    QList<QTcpSocket*> tcpSocketClients = server->findChildren<QTcpSocket*>();
    //当用户不选择向所有客户端进行发送时候
    if(tcpSocketClients.isEmpty()){
        QMessageBox msgBox;
        msgBox.setWindowTitle("发送错误!");
        msgBox.setText("当前无连接!");
        msgBox.exec();
        ui->btnSend->setEnabled(false);
        return;
    }
    if(ui->comboBoxChildren->currentText() != "All"){
        QString currentName = ui->comboBoxChildren->currentText();
        for(QTcpSocket* tmp : tcpSocketClients){
            if(QString::number(tmp->peerPort()) == currentName){
                tmp->write(ui->textEditSend->toPlainText().toStdString().c_str());
            }
        }
    }else{
        //遍历所有子客户端，并一一调用write函数，向所有客户端发送消息
        for(QTcpSocket* tmp : tcpSocketClients){
                QByteArray sendData = ui->textEditSend->toPlainText().toUtf8();
                tmp->write(sendData);
        }
    }
}

void Widget::on_btnStopListen_clicked()
{
    QList<QTcpSocket*> tcpSocketClients = server->findChildren<QTcpSocket*>();
    for(QTcpSocket* tmp : tcpSocketClients){
        tmp->close();
    }
    server->close();

    ui->btnListen->setEnabled(true);
    ui->btnApart->setEnabled(false);
    ui->btnStopListen->setEnabled(false);
}

void Widget::on_btnApart_clicked()
{
    on_btnStopListen_clicked();
    delete server;
    this->close();
}

client

#include "widget.h"
#include "ui_widget.h"

#include <QTimer>

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    this->setLayout(ui->verticalLayout);

    ui->btnDisconnected->setEnabled(false);
    ui->btnSend->setEnabled(false);

    client = new QTcpSocket(this);
    connect(client,SIGNAL(readyRead()),this,SLOT(mRead_data_From_Server()));
}

Widget::~Widget()
{
    delete ui;
}

void Widget::on_btnConnected_clicked()
{
    client->connectToHost(ui->lineEditIPAddr->text(),ui->lineEditPort->text().toInt());

    timer = new QTimer(this);
    timer->setSingleShot(true);
    timer->setInterval(5000);

    connect(timer,SIGNAL(timeout()),this,SLOT(onTimeout()));
    connect(client,SIGNAL(connected()),this,SLOT(onConnected()));
    connect(client,SIGNAL(error(QAbstractSocket::SocketError)),
                          this,SLOT(onError(QAbstractSocket::SocketError)));

    this->setEnabled(false);
    timer->start();
}

void Widget::mRead_data_From_Server()
{
    ui->textEditRev->moveCursor(QTextCursor::End);
    ui->textEditRev->ensureCursorVisible();
    mInsertTextByColor(Qt::black,client->readAll());
}

void Widget::on_btnSend_clicked()
{
    QByteArray sendData = ui->textEditSend->toPlainText().toUtf8();
    client->write(sendData);
    mInsertTextByColor(Qt::red,sendData);
}

void Widget::on_btnDisconnected_clicked()
{
    client->disconnectFromHost();
    client->close();
    ui->textEditRev->append("中止连接!");
    ui->btnConnected->setEnabled(true);
    ui->lineEditPort->setEnabled(true);
    ui->lineEditIPAddr->setEnabled(true);
    ui->btnDisconnected->setEnabled(false);
    ui->btnSend->setEnabled(false);
}

void Widget::onConnected()
{
    timer->stop();
    this->setEnabled(true);
    ui->textEditRev->append("连接成功!");
    ui->btnConnected->setEnabled(false);
    ui->lineEditPort->setEnabled(false);
    ui->lineEditIPAddr->setEnabled(false);
    ui->btnDisconnected->setEnabled(true);
    ui->btnSend->setEnabled(true);
}

void Widget::onError(QAbstractSocket::SocketError error)
{
    ui->textEditRev->insertPlainText("连接出问题："+client->errorString());
    this->setEnabled(true);
    on_btnDisconnected_clicked();
}

void Widget::onTimeout()
{
    ui->textEditRev->insertPlainText("连接超时!");
    client->abort();
    this->setEnabled(true);
}

void Widget::mInsertTextByColor(Qt::GlobalColor color,QString str)
{
    QTextCursor cursor = ui->textEditRev->textCursor();
    QTextCharFormat format;
    format.setForeground(QBrush(QColor(color)));
    cursor.setCharFormat(format);
    cursor.insertText(str);
}