QTcpSocket客户端、服务端互发字符串Demo

最近又遇到tcp问题，发现知识不用忘得好快！于是做了一个简单的demo。

先看下运行效果：

Github地址：

​​https://github.com/ShaShiDiZhuanLan/Demo_TcpSocket_Qt​​

码云地址：

​​https://gitee.com​​​​/ShaShiDiZhuanLan/​​​​TCP_Demo​​

今天做了个类似的项目，发现服务端获取局域网IP这里不准确，我们是要获取192.168.*.*的IP地址，

代码改为如下：

QString TcpSever::getIPAddress()
{
    //获取局域网IP地址192.168.*.*
    QString localHostName = QHostInfo::localHostName();
    QHostInfo info = QHostInfo::fromName(localHostName);
    foreach(QHostAddress address, info.addresses()) {
        if (address.protocol() == QAbstractSocket::IPv4Protocol) {
            return address.toString();
        }
    }
}

或者：

QString ip = QHostInfo::fromName(QHostInfo::localHostName()).addresses().last().toString();

获取本机外网地址修改：

//返回外网IP
QString TcpSever::returnOutIP()
{
    QString tmp = GetHtml("https://ip.cn/");
    qDebug() << "returnOutIP" << tmp;
    return GetNetIP(tmp);
}

QString TcpSever::GetHtml(QString url)
{
    QNetworkAccessManager *manager = new QNetworkAccessManager();
    QNetworkReply *reply = manager->get(QNetworkRequest(QUrl(url)));
    QByteArray responseData;
    QEventLoop eventLoop;
    QObject::connect(manager, SIGNAL(finished(QNetworkReply *)), &eventLoop, SLOT(quit()));
    eventLoop.exec();
    responseData = reply->readAll();
    return QString(responseData);
}

QString TcpSever::GetNetIP(QString webCode)
{
    QString tmp = webCode.split("IP: ").last();
    return tmp.split("\n<br").first();
}