Send message on to client after connection

[fogzot]

Describe the feature request

I am trying to publish a message just after a client connects and subscribes to a specific topic. The message is intended to send initial configuration to the client, so it is important that the client receives it. I tryied injecting a message using InjectApplicationMessage from the ClientSubscribedTopicAsync event but the client does not receive the message.

Which project is your feature request related to?

• Server

Describe the solution you'd like

It would be nice if ClientSubscribedTopicAsync could be called after setting up the client subscription and make sure that messages generated on the server are correctly delivered.

Note: I am using version 4.0.0 of MQTTnet; in version 3 this worked.

[fogzot]

Additional information: injecting the message in a different task that delays even as little as 1ms is enough for the client to receive the message. It seems that when OnClientSubscribedTopic is called the client is not yet subscribed and the message gets lost. I'd like the message to not be lost or, at least, to use an informative name for the event, like ClientSubscribingTopicAsync.

[chkr1011]

I fixed this issue. Please test with version 4.0.2.192 from the MyGet feed (see readme) and let me know if it works. No delay etc. is required. The event was just fired at the wrong time (as you already mentioned).

[fogzot]

The readme does not contain any reference to a MyGet feed.

[MD-V]

It does :) --> https://www.myget.org/feed/mqttnet/package/nuget/MQTTnet

[fogzot]

My fault. I used Ctrl-F on the homepage and found nothing. :(

[fogzot]

And I confirm it works. Great, thanks.

[qcjxberin]

I feel that it is not as convenient to use as before, and the new one does not know what to use.