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Error The program has unexpectedly finished while uploading multiple files

  • I want to upload multiple files on server here is my code but using this code application crashed

     QHttpMultiPart *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);
     QHttpPart imagePart;
     imagePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("text/plain"));
     QString uploadFile = uploadLine->text();
     if(! uploadFile.isEmpty())
        QDirIterator UploadFolderFiles(uploadFile, QDir::Files | QDir::NoDotAndDotDot | QDir::NoSymLinks, QDirIterator::Subdirectories);
       while (UploadFolderFiles.hasNext()) {
                 //get the files
                 QString currentFile =;
                 qDebug() << currentFile;
                 imagePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data;name=usersfilename;         filename="+currentFile));
                 QHttpPart textPart;
                 QFile *file = new QFile(currentFile);
                 QString uploadDocUrl = docxProLine->text();
                 QString clientToken = tokenLine->text();
                 QUrl url(uploadDocUrl + "?ClientToken="+clientToken);
                 QNetworkRequest request(url);
                 qDebug() <<url;
                 QNetworkAccessManager *networkManager= new QNetworkAccessManager;
                 QNetworkReply * reply = networkManager->post(request, multiPart);
                 multiPart->setParent(reply); // delete the multiPart with the reply
                    qDebug() <<reply;
                    if (reply->error() == QNetworkReply::NoError)
                                              QString strReply = (QString)reply->readAll();
                                              //parse json
                                              qDebug() << "Response:" << strReply;
                                              QJsonDocument jsonResponse = QJsonDocument::fromJson(strReply.toUtf8());
                                              QJsonObject jsonObj = jsonResponse.object();
                                              QJsonObject result=jsonObj["result"].toObject();
                                                  QJsonObject data=result["data"].toObject();
                                                  QMessageBox::information(this, tr("Uploaded Successful"),
                                                      tr("\"%1\"uploaded successfully").arg("File"));
                                                  QErrorMessage msg;
                                                  msg.showMessage("Error during upload proces");
                                              delete reply;
                }//while ends here
       }//if ends here null

  • @developerNancy Here is the Error

    QObject::setParent: Cannot set parent, new parent is in a different thread
    terminate called after throwing an instance of 'std::bad_alloc'
    what(): std::bad_alloc
    The program has unexpectedly finished.

  • Moderators

    First of all, don't create a new QNetworkAccessManager for each file. Create one QNetworkAccessManager only, and use that to upload all your files.

    If that still doesn't resolve your issue, post your updated code here.

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