Missing the MqttServerOptionsBuilder withConnectionValidator() function

[Erksen]

Hello MQTTnet team,

I am working on a own project with a mqtt server based on your libary.

My goal was to create a server with an user/password validation. Therefor I read the your wiki page on github (image cutout below). It said that I should use for the setup the withConnectionValidator function from the MqttServerOptionsBuilder class. The problem is that this function doesn't exists anymore in the class.

Am I doing it wrong?
I hope you can help. Thanks in advance

[SeppPenner]

Hi @Erksen. The problem is that the wiki is not always up-to-date (It's quite difficult to keep up with all changes). That's why @chkr1011 decided to only use the wiki for older versions (Below 4.x), can also be found on the top of the wiki page for e.g. the server: https://github.com/dotnet/MQTTnet/wiki/Server -->

So, the best is to have a look at the samples directory in the project right now. If you want to, you can check out my project under https://github.com/SeppPenner/SimpleMqttServer/blob/master/src/SimpleMqttServer/MqttService.cs where I have added user validation by username and password.

As short example on how it can be done with the asnyc events in V4 of the library:

private void SetupServer()
{
    var optionsBuilder = new MqttServerOptionsBuilder()
       .WithDefaultEndpoint()
       .WithDefaultEndpointPort(1883)
       .WithEncryptedEndpointPort(8883);

    var mqttServer = new MqttFactory().CreateMqttServer(optionsBuilder.Build());
    mqttServer.ValidatingConnectionAsync += this.ValidateConnectionAsync;
}

private Task ValidateConnectionAsync(ValidatingConnectionEventArgs args)
{
    // ... Do something with the args, e.g. user name and password.
}

[Erksen]

Thank you very much.
Sorry that I missed the hint from the version in the wiki.

You are doing a great job with this project.

[bruceb85]

so how do you get the password for comparison from the ValidatingConnectionEventArgs args?