static string ReceiveMesHandler(MQTTnet.Client.IMqttClient mqttClient)
{
string mes = null;
do
{
mqttClient.UseApplicationMessageReceivedHandler(e =>
{
try
{
string topic = e.ApplicationMessage.Topic;
if (string.IsNullOrWhiteSpace(topic) == false)
{
mes = Encoding.UTF8.GetString(e.ApplicationMessage.Payload);
}
}
catch (Exception ex)
{
mes = ex.Message;
}
});
} while (mes == null);
return(mes);
}
private void Page_Loaded(object sender, RoutedEventArgs e)
{
if (initial)
{
return;
}
BrokerTextBox.DataContext = Tools.Global.setting;
PortTextBox.DataContext = Tools.Global.setting;
ClientTextBox.DataContext = Tools.Global.setting;
TLSCheckBox.DataContext = Tools.Global.setting;
UserTextBox.DataContext = Tools.Global.setting;
PasswordTextBox.DataContext = Tools.Global.setting;
KeepAliveTextBox.DataContext = Tools.Global.setting;
CleanTextBox.DataContext = Tools.Global.setting;
HexCheckBox.DataContext = Tools.Global.setting;
ConnectButton.DataContext = this;
SettingStackPanel.DataContext = this;
mqttClient.UseConnectedHandler(async e =>
{
this.Dispatcher.Invoke(new Action(delegate
{
MqttIsConnected = mqttClient.IsConnected;
subListBox.Items.Clear();
}));
});
mqttClient.UseDisconnectedHandler(async e =>
{
this.Dispatcher.Invoke(new Action(delegate
{
MqttIsConnected = mqttClient.IsConnected;
subListBox.Items.Clear();
subListBox.Items.Add(TryFindResource("MQTTNotConnect") as string ?? "?!");
}));
});
//
mqttClient.UseApplicationMessageReceivedHandler(e =>
{
this.Dispatcher.Invoke(new Action(delegate
{
Tools.Logger.ShowDataRaw(new Tools.DataShowRaw {
title = $"MQTT → {e.ApplicationMessage.Topic}({(int)e.ApplicationMessage.QualityOfServiceLevel})",
data = e.ApplicationMessage.Payload,
color = Brushes.DarkGreen
});
}));
});
initial = true;
}
public async Task ConnectToBrokerAsync(string nelloTopicId)
{
try
{
_nelloTopicId = nelloTopicId;
var options = new MqttClientOptionsBuilder()
.WithTcpServer(SERVER_ADDRESS, SERVER_PORT)
.Build();
_client.UseDisconnectedHandler(async e =>
{
try
{
await _client.ReconnectAsync();
}
catch (Exception ex)
{
_logger.LogError("UseDisconnectedHandler error:\n" + ex.ToString());
}
});
_client.UseConnectedHandler(async e =>
{
try
{
foreach (var topic in _mqttListeningTopics)
{
await SubscribeToTopicAsync(string.Format("{0}{1}/{2}", TOPIC_PREFIX, _nelloTopicId, topic));
}
}
catch (Exception ex)
{
_logger.LogError("UseDisconnectedHandler error:\n" + ex.ToString());
}
});
_client.UseApplicationMessageReceivedHandler(e =>
{
try
{
if (e.ApplicationMessage.Topic.StartsWith("/nello_one"))
{
var args = new MqttMessageEventArgs();
args.ClientId = e.ClientId;
args.Message = Encoding.UTF8.GetString(e.ApplicationMessage.Payload);
args.Topic = e.ApplicationMessage.Topic;
MqttMessageReceived?.Invoke(this, args);
}
}
catch (Exception ex)
{
_logger.LogError("UseDisconnectedHandler error:\n" + ex.ToString());
}
});
await _client.ConnectAsync(options);
}
catch (Exception ex)
{
_logger.LogError("ConnectToBrokerAsync error:\n" + ex.ToString());
}
}
public async Task <bool> ConnectAsync(string clientId, string host, int port, bool tls, string username, string password)
{
this.mqttState.AddMessage($"connecting to {host}");
var options = new MqttClientOptionsBuilder()
.WithClientId(clientId)
.WithTcpServer(host, port)
.WithCleanSession();
if (!string.IsNullOrEmpty(username))
{
options = options.WithCredentials(username, password);
}
if (tls)
{
options = options.WithTls();
}
client = new MqttFactory().CreateMqttClient();
var t = new TaskCompletionSource <Boolean>();
var ct = new CancellationTokenSource(5000); // timeout ms
ct.Token.Register(() => { if (!t.Task.IsCompleted)
{
t.SetResult(false);
}
}, useSynchronizationContext: false);
client.UseConnectedHandler(e => {
this.mqttState.AddMessage("Connected");
mqttState.SetConnected(true);
t.SetResult(true);
});
client.UseDisconnectedHandler(e => {
this.mqttState.AddMessage("Disconnected");
mqttState.SetConnected(false);
});
client.UseApplicationMessageReceivedHandler(e =>
{
var subscription = mqttState.Subscriptions.SingleOrDefault(s => s.Topic == e.ApplicationMessage.Topic);
if (subscription != null)
{
subscription.AddMessage(
new MqttSubscriptionMessage(
e.ApplicationMessage.Topic,
Encoding.Default.GetString(e.ApplicationMessage.Payload),
DateTime.Now)
);
}
});
try
{
var result = await client.ConnectAsync(options.Build(), CancellationToken.None);
if (result.ResultCode != MQTTnet.Client.Connecting.MqttClientConnectResultCode.Success)
{
this.mqttState.AddMessage("Error: " + result.ReasonString);
}
}
catch (Exception e)
{
Console.Error.WriteLine(e.Message + " : " + e.StackTrace);
t.SetResult(false);
}
return(await t.Task);
}
