QT之Http請求

 void MainWindow::sendPostRequest()

 {

     QNetworkAccessManager *m_pHttpMgr = new QNetworkAccessManager();

     //設定url

     QString url = "http://10.0.0.20:8005/order/charge";

     //設定頭資訊

     QNetworkRequest requestInfo;

     requestInfo.setUrl(QUrl(url));

     requestInfo.setHeader(QNetworkRequest::ContentTypeHeader,QVariant("application/json"));

 //  requestInfo.setRawHeader("Content-Type","application/json");//伺服器要求的資料頭部

 //  requestInfo.setRawHeader("Accept","text/json,*/*;q=0.5");//伺服器要求的資料頭部

     //傳送資料

     QByteArray qByteHttpData = sendJson();

     QNetworkReply *reply =  m_pHttpMgr->post(requestInfo, qByteHttpData);

     //新增事件迴圈機制，返回後再執行後面的

     QEventLoop eventLoop;

     connect(reply, SIGNAL(finished()), &eventLoop, SLOT(quit()));

     eventLoop.exec();       //block until finish

     //錯誤處理

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

     {

         qDebug() << "request protobufHttp NoError";

     }

     else

     {

         qDebug()<<"request protobufHttp handle errors here";

         QVariant statusCodeV = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);

         //statusCodeV是HTTP伺服器的相應碼，reply->error()是Qt定義的錯誤碼，可以參考QT的文件

         qDebug( "request protobufHttp found error ....code: %d %d\n", statusCodeV.toInt(), (int)reply->error());

         qDebug(qPrintable(reply->errorString()));

     }

     //請求收到的結果

     QByteArray responseByte = reply->readAll();

 ｝

 void MainWindow::sendGetRequest()

 {

     QNetworkAccessManager *m_pHttpMgr = new QNetworkAccessManager();

     //設定url

     QString url = "http://10.0.0.20:8005/vending_machine/items/ac83f39ea268";//fae4b325e52c

     QNetworkRequest requestInfo;

     requestInfo.setUrl(QUrl(url));

     //新增事件迴圈機制，返回後再執行後面的

     QEventLoop eventLoop;

     QNetworkReply *reply =  m_pHttpMgr->get(requestInfo);

     connect(reply, SIGNAL(finished()), &eventLoop, SLOT(quit()));

     eventLoop.exec();       //block until finish

     //錯誤處理

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

     {

         qDebug() << "request protobufHttp NoError";

     }

     else

     {

         qDebug()<<"request protobufHttp handle errors here";

         QVariant statusCodeV = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);

         //statusCodeV是HTTP伺服器的相應碼，reply->error()是Qt定義的錯誤碼，可以參考QT的文件

         qDebug( "request protobufHttp found error ....code: %d %d\n", statusCodeV.toInt(), (int)reply->error());

         qDebug(qPrintable(reply->errorString()));

     }

     //請求返回的結果

     QByteArray responseByte = reply->readAll();

     qDebug() << responseByte;

 ｝