QT POST/GET 发送/获取网页数据

#include <QNetworkReply>
#include <QNetworkRequest>

QNetworkAccessManager *m_accessManager;

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

m_accessManager = new QNetworkAccessManager(this);
QObject::connect(m_accessManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(finishedSlot(QNetworkReply*)));
}

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

void Widget::finishedSlot(QNetworkReply *reply)
{
if (reply->error() == QNetworkReply::NoError)
{
QByteArray bytes = reply->readAll();
qDebug()<<bytes;
QString string = QString::fromUtf8(bytes);

ui->textBrowser->setText(string.toUtf8());
}
else
{
qDebug()<<"handle errors here";
QVariant statusCodeV = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
//statusCodeV是HTTP服务器的相应码，reply->error()是Qt定义的错误码，可以参考QT的文档
qDebug( "found error ....code: %d %d\n", statusCodeV.toInt(), (int)reply->error());
qDebug(qPrintable(reply->errorString()));
}
reply->deleteLater();
}

void Widget::on_pushButton_clicked()
{
//POST
QNetworkRequest *request = new QNetworkRequest();

request->setUrl(QUrl("http://localhost:8888/login"));
//    request->setHeader(QNetworkRequest::ContentTypeHeader,"application/x-www-form-urlencoded");
//    request->setRawHeader("Accept","text/html, application/xhtml+xml, */*");
//    request->setRawHeader("Referer","http://localhost:8888/login");
//    request->setRawHeader("Accept-Language","zh-CN");
//    request->setRawHeader("X-Requested-With","XMLHttpRequest");
//    request->setRawHeader("User-Agent","Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)");
//    request->setRawHeader("Content-Type","application/x-www-form-urlencoded");
//    request->setRawHeader("Accept-Encoding","gzip,deflate");
//    request->setRawHeader("Host","localhost:8888");
//    request->setRawHeader("Content-Length","18");
//    request->setRawHeader("Connection","Keep-Alive");
//    request->setRawHeader("Cache-Control","no-cache");

QByteArray postData;
postData.append("myname=lk&mypwd=33");

QNetworkReply* reply = m_accessManager->post(*request,postData);
}

void Widget::on_pushButton_get_clicked()
{
//GET

//    QUrl url("https://kyfw.12306.cn/otn/resources/js/framework/station_name.js");
//    QUrl url("http://localhost:8888/login");
//    QUrl url("http://dict.baidu.com/s?wd=name");

QNetworkRequest *request = new QNetworkRequest();
request->setUrl(QUrl("http://dict.baidu.com/s?wd=name"));

m_accessManager->get(*request);
}