Tutorial suggestions/questions

[semlanik]

Please leave to feedback for QtProtobuf tutorial here

[rxr7]

Thanks for the QtProtobuf tutorial. Especially the clienttutorial really helped me getting started.

However, I ran into some troubles right away when trying to send messages between a simple client and a simple server. I hope that maybe you can help me out.

I wrote a simple client closely following the QtProtobuf clienttutorial. The server is written following a tutorial from the gRPC website: gRPC C++ Basics Tutorial.

When sending messages between the two I get the following error message on the client side:

setCachingEnabled:  11  bytesDownloaded
QNetworkReplyImpl: backend error: caching was enabled after some bytes had been written

It seems like the client is trying to enable disk caching after it already started reading the messages. On the server side everything seems to be okay. Is there a way to enable disk caching as a workaround, e.g., as option when defining the client?

Unfortunately, there is not much information on the internet about this error. In a completely different context this error seems to be related to a (high-speed) connection on localhost: ariya/phantomjs#13165. I ran the client and server on different machines to test this. However, I still get the error.

I am happy to provide some code if it helps.

Thank you for your help.

[semlanik]

@rxr7, it's internal issue in Qt. I quite not sure what it is related to, but I simply ignore it. It doesn't have any effect on QtProtobuf work, per my experience. If it cause any issue for you probably it's time to submit issue to Qt.