void Client_MqttMsgSubscribeReceived(object sender, MqttMsgSubscribeEventArgs e)
{
MqttClient client = (MqttClient)sender;
mqttBridge.OnSubscribe(client, e);
for (int i = 0; i < e.Topics.Length; i++)
{
// TODO : business logic to grant QoS levels based on some conditions ?
// now the broker granted the QoS levels requested by client
// subscribe client for each topic and QoS level requested
this.subscriberManager.Subscribe(e.Topics[i], e.QoSLevels[i], client);
}
try
{
// send SUBACK message to the client
client.Suback(e.MessageId, e.QoSLevels);
for (int i = 0; i < e.Topics.Length; i++)
{
// publish retained message on the current subscription
this.publisherManager.PublishRetaind(e.Topics[i], client.ClientId);
}
}
catch (MqttCommunicationException)
{
this.CloseClient(client);
}
}
public virtual void OnSubscribe(MqttClient client, MqttMsgSubscribeEventArgs message)
{
Composable.GetExport<IXLogger>().Verbose("Mqtt Subscribe {@m}", message);
return;
}
void Client_MqttMsgSubscribeReceived(object sender, MqttMsgSubscribeEventArgs e)
{
MqttClient client = (MqttClient)sender;
// Since a client may subscribe to multiple topics, we must check each one
var topicAuth = new Dictionary<string, bool>();
for (int i = 0; i < e.Topics.Length; i++)
{
// Authenticate this client & topic.
var verified = this.uacManager.PubSubAuthentication(false, client.ClientId, e.Topics[i]);
topicAuth[e.Topics[i]] = verified;
if (verified)
{
// TODO : business logic to grant QoS levels based on some conditions ?
// now the broker granted the QoS levels requested by client
// subscribe client for each topic and QoS level requested
this.subscriberManager.Subscribe(e.Topics[i], e.QoSLevels[i], client);
}
}
bool closeClient = false;
try
{
// If any have been allowed, send the suback
if (topicAuth.Any(x => x.Value))
{
// send SUBACK message to the client
client.Suback(e.MessageId, e.QoSLevels);
for (int i = 0; i < e.Topics.Length; i++)
{
// Send any retained message to the subscriber if verified
var verified = topicAuth[e.Topics[i]];
if (verified)
{
// publish retained message on the current subscription
this.publisherManager.PublishRetaind(e.Topics[i], client.ClientId);
}
}
}
else
{
closeClient = true;
}
}
catch (MqttCommunicationException)
{
closeClient = true;
}
if (closeClient)
{
this.CloseClient(client);
}
}