QNetworkAccessManager Download Image
Hi, I'm using PySide and I'm having trouble figuring out why I can't download an image properly using QNetworkAccessManager.
Here's what I'm doing:
manager = QNetworkAccessManager() def downloadThumbnail(self): thumbnail = 'https://.../some-thumbnail.jpg' request = QNetworkRequest(QUrl(thumbnail)) reply = manager.get(request) reply.finished.connect(self.onThumbnailLoaded) @Slot() def onThumbnailLoaded(self): if reply.error() == QNetworkReply.NoError: thumbnailData = reply.readAll() pixmap = QPixmap() pixmap.loadFromData(thumbnailData) self.someLabel.setPixmap(pixmap)
There is no reply error. reply.readAll() does not have an error. pixmap.loadFromData returns False, but I don't know why.
I would check what reply.readAll() returns. You can even store it in a file and check that file.
I updated the code to be:
thumbnailData = reply.readAll() tempFile = QFile(r'C:\temp.jpg') tempFile.open(QIODevice.WriteOnly) tempFile.write(thumbnailData) tempFile.close()
When I open the file, it says: "Windows Photo Viewer can't open this picture because the file appears to be damaged, corrupted, or is too large."
But if I open the url in a browser I can see the image. If I do thumbnailData.count(), I get 304, so there is something there. I don't know what I'm doing wrong.
What is the content of thumbnailData after reading the reply?
Printing out thumbnailData.data(), I get:
The resource was found at https://...
So I realize my problem now. The thumbnail url is redirecting me to another url which is what I actually want to use to download for the QPixmap.
Thanks for your help everyone.