uploadProgress signal emitted 0/0 with long delay

[yasen]

uploadProgress signal not emitted real upload progress. When i upload large file, progress emited 3 times, example:
16384 / 10175221
6766592 / 10175221
10175221 / 10175221
but signal 0 / 0 emited with long delay. I think that the signal is emitted when the file is uploaded to some intermediate buffer, and not to the remote server. How to get real upload progress?
Code example:

QHttpMultiPart *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);

QHttpPart profileIdPart;
profileIdPart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"profile_id\""));
profileIdPart.setBody(GlobalsArgs::profileID.toUtf8());
multiPart->append(profileIdPart);

QHttpPart fileTypePart;
fileTypePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"file_type\""));
fileTypePart.setBody(fileT.toUtf8());
multiPart->append(fileTypePart);

fileObj = new QFile(file);
QHttpPart imagePart;
imagePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"file\"; filename=\"" + fileObj->fileName() +"\""));
imagePart.setHeader(QNetworkRequest::ContentLengthHeader, fileInfo.size());
imagePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("application/octet-stream"));
fileObj->open(QIODevice::ReadOnly | QIODevice::Unbuffered);
imagePart.setBodyDevice(fileObj);
fileObj->setParent(multiPart);
multiPart->append(imagePart);

QUrl url(GlobalsArgs::uploadURL + "/files/");
QByteArray headerRowName;
headerRowName.append(" Bearer " + GlobalsArgs::uploadToken);

QNetworkRequest request(url);
request.setRawHeader("Authorization", headerRowName);
request.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::AlwaysNetwork);
request.setAttribute(QNetworkRequest::DoNotBufferUploadDataAttribute, true);

manager = new QNetworkAccessManager(this);
reply = manager->post(request, multiPart);
multiPart->setParent(reply);

connect(manager, SIGNAL(finished(QNetworkReply*)),
        this, SLOT   (uploadDone(QNetworkReply*)));

connect(reply, SIGNAL(uploadProgress(qint64, qint64)),
        this, SLOT  (uploadProgress(qint64, qint64)));

[SGaist]

Hi and welcome to devnet,

You should add:

• Which version of Qt
• Which OS you are running your application
• Whether it happens with all the files, if not, what is the size trigger
• What kind of server do you have on the other side

[yasen]

@SGaist ty for reply,

Version Qt: 5.11.2
OS version: Windows 7 (64bit)
Happens with all files types and size
server side: node.js (express.js)

[yasen]

no thoughts?

[SGaist]

Well, I would test against another server, I haven't had that problem yet.

You might also want to update to Qt 5.12.2.

[yasen]

Qt 5.12.2 same problem

[yasen]

Tested on another server, everything works fine