/// <inheritdoc cref="IMqttClientConfigBuilder.WithCommunicationTimeout" />
public IMqttClientConfigBuilder WithCommunicationTimeout(TimeSpan timeout)
{
Check.Range(timeout, nameof(timeout), TimeSpan.Zero, TimeSpan.MaxValue);
_builder.WithCommunicationTimeout(timeout);
return(this);
}
private IMqttClientOptions CreateMqttClientOptions()
{
var options = new MqttClientOptionsBuilder()
.WithClientId(_settings.ClientId)
.WithCredentials(_settings.Username, _settings.Password);
if (_settings.TcpEndPoint.Enabled)
{
if (_settings.TcpEndPoint.Port > 0)
{
options.WithTcpServer(_settings.TcpEndPoint.Server, _settings.TcpEndPoint.Port);
}
else
{
options.WithTcpServer(_settings.TcpEndPoint.Server);
}
}
else
{
options.WithTcpServer("localhost");
}
if (_settings.CommunicationTimeout > 0)
{
options.WithCommunicationTimeout(TimeSpan.FromSeconds(_settings.CommunicationTimeout));
}
if (_settings.EnableCleanSessions)
{
options.WithCleanSession();
}
return(options.Build());
}
/// <summary>
/// Converts the connection options to client options.
/// </summary>
public IMqttClientOptions ToMqttClientOptions()
{
MqttClientOptionsBuilder builder = new MqttClientOptionsBuilder()
.WithTcpServer(Server, Port > 0 ? Port : null);
if (!string.IsNullOrEmpty(ClientID))
{
builder.WithClientId(ClientID);
}
if (!string.IsNullOrEmpty(Username))
{
builder.WithCredentials(Username, Password);
}
if (Timeout > 0)
{
builder.WithCommunicationTimeout(TimeSpan.FromMilliseconds(Timeout));
}
if (ProtocolVersion > MqttProtocolVersion.Unknown)
{
builder.WithProtocolVersion(ProtocolVersion);
}
return(builder.Build());
}
public static IServiceCollection AddMqttServices <TMqttSettings>(this IServiceCollection services, IConfiguration mqttConfiguration)
where TMqttSettings : MqttSettings, new()
{
services.AddOptions <TMqttSettings>()
.Bind(mqttConfiguration)
.ValidateDataAnnotations();
services.AddSingleton(sp =>
{
var mqttSettings = sp.GetRequiredService <IOptions <TMqttSettings> >().Value;
var mqttClientOptionsBuilder = new MqttClientOptionsBuilder()
.WithTcpServer(mqttSettings.Host, mqttSettings.Port)
.WithProtocolVersion(mqttSettings.MqttProtocolVersion ?? MqttProtocolVersion.V500);
if (mqttSettings.ClientId != null)
{
mqttClientOptionsBuilder = mqttClientOptionsBuilder.WithClientId(mqttSettings.ClientId);
}
if (mqttSettings.CommunicationTimeout.HasValue)
{
mqttClientOptionsBuilder = mqttClientOptionsBuilder.WithCommunicationTimeout(mqttSettings.CommunicationTimeout.Value);
}
mqttClientOptionsBuilder = mqttSettings.KeepAliveInterval.HasValue ?
mqttClientOptionsBuilder.WithKeepAlivePeriod(mqttSettings.KeepAliveInterval.Value) :
mqttClientOptionsBuilder.WithNoKeepAlive();
var lastWillAndTestamentMessage = mqttSettings.GetLastWillAndTestamentApplicationMessage();
if (lastWillAndTestamentMessage != null)
{
mqttClientOptionsBuilder = mqttClientOptionsBuilder.WithWillMessage(lastWillAndTestamentMessage);
}
return(mqttClientOptionsBuilder.Build());
});
services.AddSingleton <IMqttFactory, MqttFactory>();
services.AddTransient(sp =>
{
var factory = sp.GetRequiredService <IMqttFactory>();
var client = factory.CreateMqttClient();
return(client);
});
return(services);
}
public void Connect(out string errMsg)
{
errMsg = "";
if (this.mqttClient != null && this.mqttClient.IsConnected)
{
return;
}
if (this.param == null)
{
errMsg = "连接MQTT服务端失败,没有指明服务参数";
return;
}
try
{
mqttClient = new MqttFactory().CreateMqttClient() as MqttClient;
this.OnloadEvents();
MqttClientOptionsBuilder optionsBuilder = new MqttClientOptionsBuilder();
optionsBuilder.WithCommunicationTimeout(TimeSpan.FromSeconds(10));// 只连接等待10秒
optionsBuilder.WithTcpServer(this.param.ip, this.param.port);
optionsBuilder.WithCredentials(this.param.userName, this.param.password);
optionsBuilder.WithClientId(this.param.clientID);
optionsBuilder.WithCleanSession(true);// 临时会话
Task task = mqttClient.ConnectAsync(optionsBuilder.Build());
task.Wait(5000);
if (!this.IsConnected)
{
errMsg = "连接MQTT服务器失败";
}
}
catch (Exception ex)
{
errMsg = "连接到MQTT服务器失败！" + ex.Message;
}
}
private MqttClientOptionsBuilder CreateOptionsBuilder(ClientCredentials credentials = null)
{
MqttClientOptionsBuilder clientOptionsBuilder = new MqttClientOptionsBuilder();
MqttClientOptionsBuilderTlsParameters tlsParameters = null;
string hostName = Settings.Client.BrokerHostname;
int portNum = Settings.Client.BrokerPort;
//check if broker endpoint for local connections is defined in environment, only possible for connections without credentials
if (credentials == null)
{
string brokerEndpoint = Environment.GetEnvironmentVariable("GE_BROKER_CONNECTION_ENDPOINT");
if (!string.IsNullOrEmpty(brokerEndpoint))
{
string[] tokens = brokerEndpoint.Split(':');
if (tokens.Length == 2)
{
hostName = tokens[0];
portNum = Convert.ToInt32(tokens[1], CultureInfo.InvariantCulture);
}
}
}
clientOptionsBuilder.WithCleanSession();
clientOptionsBuilder.WithClientId(ClientId);
if (portNum == 443)
{
clientOptionsBuilder.WithWebSocketServer(hostName);
}
else
{
clientOptionsBuilder.WithTcpServer(hostName, portNum);
}
if (credentials != null)
{
if (credentials.HasCertificates())
{
tlsParameters = new MqttClientOptionsBuilderTlsParameters
{
UseTls = true,
AllowUntrustedCertificates = Settings.Client.AllowUntrustedCertificates,
IgnoreCertificateChainErrors = Settings.Client.IgnoreCertificateChainErrors,
IgnoreCertificateRevocationErrors = Settings.Client.IgnoreCertificateRevocationErrors,
CertificateValidationHandler = CertificateValidationCallback,
Certificates = credentials.ClientCertAndCaChain,
SslProtocol = SslProtocols.Tls12
};
clientOptionsBuilder.WithTls(tlsParameters);
}
if (credentials.IsUserNameAndPasswordRequired())
{
credentials.GetUserNameAndPassword(ClientId, out string username, out string password);
clientOptionsBuilder.WithCredentials(username, password);
}
}
// settings for connection timeout and MQTT kepp alive interval, given in seconds
// (defaults in MQTTnet stack are CommunicationTimeout = 10 sec and KeepAlivePeriod = 15 sec.,
// see in MqttClientOptions.cs of MQTTnet)
clientOptionsBuilder.WithCommunicationTimeout(new TimeSpan(0, 0, Settings.Client.CommunicationTimeout));
clientOptionsBuilder.WithKeepAlivePeriod(new TimeSpan(0, 0, Settings.Client.MqttKeepAlivePeriod));
return(clientOptionsBuilder);
}
