C++--Qt使用Http协议

#include <QNetworkAccessManager>//包含QNetworkAccessManager类

#include <QNetworkRequest>//包含QNetworkRequest类

#include <QNetworkReply>//包含QNetworkReply类

#include <QtCore>

#include <iostream>

using namespace std ;

class TT : public QObject

{

Q_OBJECT//宏

public:

static QString getHtml(QString url)

{

QNetworkAccessManager *manager = new QNetworkAccessManager();//实例化类

QNetworkReply *reply = manager->get(QNetworkRequest(QUrl(url)));//实例化类

QByteArray responseData;//定义数据

QEventLoop eventLoop;

connect(manager, SIGNAL(finished(QNetworkReply*)), &eventLoop, SLOT(quit()));//信号槽

eventLoop.exec(); //block until finish

responseData = reply->readAll();//读取返回数据

return QString(responseData);//返回数据

}

};

int main(int argc, char *argv[])

{

QCoreApplication a(argc, argv);

QString data = TT::getHtml(QString("http://www.baidu.com") );//打开百度

cout<<data.toStdString()<<endl;//输出百度返回的内容

return a.exec();

}