public static void StartMqttServer()
{
DeviceContext devices = new DeviceContext();
if (mqttServer == null)
{
try
{
var options = new MqttServerOptions
{
ConnectionValidator = p =>
{
DeviceModel device = devices.Devices.SingleOrDefault(x => x.DeviceKey == p.Password);
if ((device.Name == p.Username) || (device.User == p.Username))
{
return(MqttConnectReturnCode.ConnectionAccepted);
}
return(MqttConnectReturnCode.ConnectionRefusedBadUsernameOrPassword);
}
};
mqttServer = new MqttServerFactory().CreateMqttServer(options) as MqttServer;
mqttServer.ApplicationMessageReceived += MqttServer_ApplicationMessageReceived;
mqttServer.ClientConnected += MqttServer_ClientConnected;
mqttServer.ClientDisconnected += MqttServer_ClientDisconnected;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
return;
}
}
mqttServer.StartAsync();
Console.WriteLine("MQTT服务启动成功！");
}
public static void MqttServer_ApplicationMessageReceived(object sender, MqttApplicationMessageReceivedEventArgs e)
{
DeviceContext devices = new DeviceContext();
string topic = e.ApplicationMessage.Topic;
string message = Encoding.UTF8.GetString(e.ApplicationMessage.Payload);
Console.WriteLine($"客户端[{e.ClientId}]>> 主题：{e.ApplicationMessage.Topic} 负荷：{Encoding.UTF8.GetString(e.ApplicationMessage.Payload)} Qos：{e.ApplicationMessage.QualityOfServiceLevel} 保留：{e.ApplicationMessage.Retain}");
string[] _topic = topic.Split(':');
string[] _message = message.Split(',');
if (_topic.Length < 2)
{
return;
}
if (_message[0] != null)
{
var dbSet = devices.Devices.Where(t => t.User == _topic[0]);
int count = dbSet.Count();
DeviceModel device = new DeviceModel();
foreach (DeviceModel _device in dbSet)
{
if (_device.Name == _message[0])
{
device = _device;
}
}
//var device = devices.Devices.SingleOrDefault(x => x.Name == _message[0]);//这个设备存在
if (device == null)
{
return;
}
if (device.User == _topic[0])//这个设备属于当前访问用户
{
if (_message[1] != null)
{
if ((_message[1] == "true") || (_message[1] == "false"))
{
device.Switch = Convert.ToBoolean(_message[1]);
}
devices.SaveChanges();
}
if (_message.Length < 3)
{
return;
}
if ((_message[2] != null) && (_topic[1] == device.Name))//只有设备端发布的消息才进入数据库
{
device.Message = _message[2];
devices.SaveChanges();
}
if ((_message.Length > 3) && (_topic[1] == device.Name))
{
if (!Directory.Exists($"wwwroot\\images\\{ device.User}\\{device.Name}"))
{
Directory.CreateDirectory($"wwwroot\\images\\{ device.User}\\{device.Name}");
}
FileStream image = File.OpenWrite($"wwwroot\\images\\{device.User}\\{device.Name}\\1.jpg");
for (int i = 3; i < _message.Length; i++)
{
byte[] b = new byte[1];
b[0] = Convert.ToByte(_message[i]);
image.Seek(i - 3, SeekOrigin.Begin);
image.Write(b, 0, 1);
}
image.Close();
}//图片
}
}
}
