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(); }