Qt post http request using

#include "mainwindow.h"
#include "ui_mainwindow.h"
//#include "datadboperation.h"

MainWindow::MainWindow(QWidget *parent) :
        QMainWindow(parent),
        ui(new Ui::MainWindow)
{
        ui->setupUi(this);

        QString strUserInfo = QString("name=%1&password=%2").arg(user).arg(passward);

        QByteArray content = strUserInfo.toUtf8();
        int contentLength = content.length();

        QNetworkRequest netReq;
        netReq.setUrl(QUrl("server ip address"));
        netReq.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
        netReq.setHeader(QNetworkRequest::ContentLengthHeader, contentLength);

        // 将用户名和密码发送至web服务器进行验证
        networkAccessManager = new QNetworkAccessManager(this);

        // 发送参数
        networkAccessManager->post(netReq, content);
        connect(networkAccessManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(SltLoginReplay(QNetworkReply*)));
}

void MainWindow::SltLoginReplay(QNetworkReply *reply)
{
        int statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();

        qDebug() << "statusCode:" << statusCode;

        if(reply->error() == QNetworkReply::NoError)
        {

                qDebug() << reply->readAll();
        }
        else
        {
                qDebug() << "=========";
        }

        // At the end of that slot, we won't need it anymore
        reply->deleteLater();
}

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