QString MainWindow::HttpGet(const QString url) {QString strPageContent;//獲取系統代理并設置QNetworkProxyQuery proxyQuery(QUrl("https://www.baidu.com"));QList<QNetworkProxy> proxyList = QNetworkProxyFactory::systemProxyForQuery(proxyQuery);if(proxyList.count() > 0){mManager->setProxy(proxyList.at(0));}//HTTP GETQNetworkRequest request;request.setUrl(QUrl(url));QEventLoop loop;QNetworkReply *reply = mManager->get(request);connect(reply, &QNetworkReply::finished, &loop, &QEventLoop::quit);loop.exec();QString strCodec;//獲取編碼方式,用于解碼QStringList contentTypeList = reply->header(QNetworkRequest::ContentTypeHeader).toString().split(";");foreach (QString content, contentTypeList) {content = content.trimmed();if(content.toLower().startsWith("charset") && content.split("=").size() > 1){strCodec = content.split("=").at(1).trimmed();;break;}}QByteArray datagram = reply->readAll();if(strCodec.isEmpty()){strPageContent.append(datagram);}else{QTextCodec *codec = QTextCodec::codecForName(strCodec.toStdString().c_str());strPageContent = codec->toUnicode(datagram);}return strPageContent; }

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