Qt – Deleting ‘QNetworkReply *’ returned by QNetworkAccessManager::post

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QNetworkAccessManager::post function returns network reply object, is caller required to delete this or network access manager will take care of deleting it.?

Best Answer

From the documentation:

Note: After the request has finished, it is the responsibility of the user to delete the QNetworkReply object at an appropriate time. Do not directly delete it inside the slot connected to finished(). You can use the deleteLater() function.

Related Solutions

Python – Qt HTTP authentication with QNetworkAccessManager

Yeh, it's odd. What I've done previously is check if I've already authenticated with those details and if I have then call QNetworkReply.abort()

Windows – Uploading a file using post() method of QNetworkAccessManager

You're creating compressedFile on the stack, and passing a pointer to it to your QNetworkRequest (and ultimately your QNetworkAccessManager). As soon as you leave the method you're in, compressedFile is going out of scope. I'm surprised it's not crashing on you, though the behavior is undefined.

You need to create the QFile on the heap:

QFile *compressedFile = new QFile("temp");

You will of course need to keep track of it and then delete it once the post has completed, or set it as the child of the QNetworkReply so that it it gets destroyed when the reply gets destroyed later:

QFile *compressedFile = new QFile("temp"); 
compressedFile->open(QIODevice::ReadOnly);

QNetworkReply *reply = netManager.post(QNetworkRequest(QUrl("http://mywebsite.com/upload") ), compressedFile); 
compressedFile->setParent(reply);

Best Answer

Related Solutions

Python – Qt HTTP authentication with QNetworkAccessManager

Windows – Uploading a file using post() method of QNetworkAccessManager

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