/// <summary>
/// 取消订阅多个主题
/// </summary>
/// <param name="topic">主题</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="ArgumentOutOfRangeException"></exception>
/// <exception cref="MqttException"></exception>
/// <returns></returns>
private ITaskSetter <bool> UnsubscribeManyInternal(string[] topic)
{
if (topic == null)
{
throw new ArgumentNullException();
}
if (topic.Length == 0)
{
throw new ArgumentOutOfRangeException();
}
var taskId = this.GenerateTaskId();
var setter = this.taskSetterTable.Create <bool>(taskId);
var topicArray = topic.Select(item => item.ToUnmanagedPointer()).ToArray();
fixed(IntPtr *ptrtopic = &topicArray[0])
{
var opt = this.InitResponseOptions(taskId);
var er = MQTTAsync.MQTTAsync_unsubscribeMany(this.handle, topic.Length, ptrtopic, ref opt);
this.EnsureSuccessCode(er);
}
return(setter);
}
/// <summary>
/// 订阅多个主题
/// </summary>
/// <param name="topicQos">主题与消息</param>
/// <param name="taskId">任务id</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="ArgumentOutOfRangeException"></exception>
/// <exception cref="MqttException"></exception>
/// <returns></returns>
private ITaskSetter <bool> SubscribeManyInternal(MqttTopicQoS[] topicQos)
{
if (topicQos == null)
{
throw new ArgumentNullException();
}
if (topicQos.Length == 0)
{
throw new ArgumentOutOfRangeException();
}
var taskId = this.GenerateTaskId();
var setter = this.taskSetterTable.Create <bool>(taskId);
var opt = this.InitResponseOptions(taskId);
var qoss = topicQos.Select(item => (int)item.QoS).ToArray();
var topics = topicQos.Select(item => item.Topic.ToUnmanagedPointer()).ToArray();
fixed(IntPtr *ptrtopic = &topics[0])
{
fixed(int *ptrqos = &qoss[0])
{
var er = MQTTAsync.MQTTAsync_subscribeMany(this.handle, qoss.Length, ptrtopic, ptrqos, ref opt);
this.EnsureSuccessCode(er);
}
}
return(setter);
}
/// <summary>
/// 设置客户端相关回调
/// </summary>
private void InitClientCallbacks()
{
var lost = new MQTTAsync_connectionLost((context, cause) =>
{
var e = this.OnConnectionLost;
if (e != null)
{
e.Invoke(this);
}
});
var arrvied = new MQTTAsync_messageArrived((context, topicName, topicLen, msg) =>
{
var e = this.OnMessageArrived;
if (e != null)
{
var topic = Marshal.PtrToStringAnsi(topicName, topicLen);
var message = MqttMessage.From(msg);
e.Invoke(this, topic, message);
}
MQTTAsync.MQTTAsync_free(topicName);
MQTTAsync.MQTTAsync_freeMessage(ref msg);
return(1);
});
var er = MQTTAsync.MQTTAsync_setCallbacks(this.handle, IntPtr.Zero, lost, arrvied, null);
this.EnsureSuccessCode(er);
this.AutoRef(lost, arrvied);
}
/// <summary>
/// mqtt客户端
/// </summary>
/// <param name="serverUri">mqtt://mymqtt.com</param>
/// <param name="clientId">客户端id</param>
/// <param name="persistence">持久化方式</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="UriFormatException"></exception>
/// <exception cref="NotSupportedException"></exception>
/// <exception cref="MqttException"></exception>
public MqttClient(string serverUri, string clientId, MqttPersistence persistence)
: base(IntPtr.Zero, true)
{
if (string.IsNullOrEmpty(serverUri))
{
throw new ArgumentNullException("serverUri");
}
if (string.IsNullOrEmpty(clientId))
{
throw new ArgumentNullException("clientId");
}
if (persistence == MqttPersistence.User)
{
var message = string.Format("不支持的持久化方式：{0}.{1}", typeof(MqttPersistence).Name, persistence);
throw new NotSupportedException(message);
}
var uri = new Uri(serverUri);
const int mqttDefaultPort = 1883;
var tcpUri = string.Format("tcp://{0}:{1}", uri.Host, uri.Port > 0 ? uri.Port : mqttDefaultPort);
var er = MQTTAsync.MQTTAsync_create(ref this.handle, tcpUri, clientId, persistence, IntPtr.Zero);
this.EnsureSuccessCode(er);
this.InitClientCallbacks();
}
/// <summary>
/// 释放句柄
/// </summary>
protected sealed override bool ReleaseHandle()
{
if (this.IsInvalid == true)
{
return(false);
}
MQTTAsync.MQTTAsync_destroy(ref this.handle);
return(this.IsInvalid);
}
static MQTTAsync()
{
var dllFile = Path.Combine(Environment.Is64BitProcess ? "x64" : "x86", mqtt3a_dll);
if (HttpContext.Current != null)
{
dllFile = Path.Combine("~\\bin", dllFile);
dllFile = HttpContext.Current.Server.MapPath(dllFile);
}
MQTTAsync.LoadLibraryA(dllFile);
}
/// <summary>
/// 设置追踪回调
/// </summary>
/// <param name="traceCallback">追踪回调，null则清除追踪</param>
public static void SetTraceCallback(Action <MqttTraceLevels, string> traceCallback)
{
if (traceCallback == null)
{
MQTTAsync.MQTTAsync_setTraceCallback(null);
}
else
{
MqttClient.trackCallback = new MQTTAsync_traceCallback((level, msg) => traceCallback(level, msg));
MQTTAsync.MQTTAsync_setTraceCallback(MqttClient.trackCallback);
}
}
/// <summary>
/// 断开连接
/// </summary>
/// <exception cref="MqttException"></exception>
/// <returns></returns>
private ITaskSetter <bool> DisconnectInternal()
{
var taskId = this.GenerateTaskId();
var setter = this.taskSetterTable.Create <bool>(taskId);
var mqttOptions = this.AutoRef <MqttDisconnecOptions>();
var opt = mqttOptions.ToStruct(taskId);
var er = MQTTAsync.MQTTAsync_disconnect(this.handle, ref opt);
this.EnsureSuccessCode(er);
return(setter);
}
/// <summary>
/// 取消订阅
/// </summary>
/// <param name="topic">主题</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="MqttException"></exception>
/// <returns></returns>
private ITaskSetter <bool> UnsubscribeInternal(string topic)
{
if (topic == null)
{
throw new ArgumentNullException();
}
var taskId = this.GenerateTaskId();
var setter = this.taskSetterTable.Create <bool>(taskId);
var opt = this.InitResponseOptions(taskId);
var er = MQTTAsync.MQTTAsync_unsubscribe(this.handle, topic, ref opt);
this.EnsureSuccessCode(er);
return(setter);
}
/// <summary>
/// 订阅
/// </summary>
/// <param name="topic">主题</param>
/// <param name="qos">质量</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="MqttException"></exception>
/// <returns></returns>
private ITaskSetter <bool> SubscribeInternal(string topic, MqttQoS qos)
{
if (string.IsNullOrEmpty(topic))
{
throw new ArgumentNullException("topic");
}
var taskId = this.GenerateTaskId();
var setter = this.taskSetterTable.Create <bool>(taskId);
var opt = this.InitResponseOptions(taskId);
var er = MQTTAsync.MQTTAsync_subscribe(this.handle, topic, qos, ref opt);
this.EnsureSuccessCode(er);
return(setter);
}
/// <summary>
/// 连接到服务器
/// </summary>
/// <param name="option">选项</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="MqttException"></exception>
/// <returns></returns>
private ITaskSetter <ConnectError> ConnectInternal(ConnectOption option)
{
if (option == null)
{
throw new ArgumentNullException();
}
this.connectOpt = option;
var taskId = this.GenerateTaskId();
var setter = this.taskSetterTable.Create <ConnectError>(taskId);
var mqttOptions = this.AutoRef <MqttConnectOptions>();
var opt = mqttOptions.ToStruct(taskId, option.ToStruct());
var er = MQTTAsync.MQTTAsync_connect(this.handle, ref opt);
this.EnsureSuccessCode(er);
return(setter);
}
/// <summary>
/// 发送消息
/// 不跟踪服务端的消息处理结果
/// </summary>
/// <param name="topic">主题</param>
/// <param name="message">消息</param>
/// <exception cref="ArgumentNullException"></exception>
/// <returns></returns>
public MqttError SendMessageAsync(string topic, MqttMessage message)
{
if (string.IsNullOrEmpty(topic))
{
throw new ArgumentNullException("topic");
}
if (message == null)
{
throw new ArgumentNullException("message");
}
var msg = message.ToStruct();
var opt = new MQTTAsync_responseOptions();
opt.Init();
var er = MQTTAsync.MQTTAsync_sendMessage(this.handle, topic, ref msg, ref opt);
msg.Dispose();
return(er);
}
/// <summary>
/// 发送消息
/// 并跟踪服务端对消息回复结果
/// </summary>
/// <param name="topic">主题</param>
/// <param name="message">消息</param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="MqttException"></exception>
/// <returns></returns>
public Task <bool> SendMessageTaskAsync(string topic, MqttMessage message)
{
if (string.IsNullOrEmpty(topic))
{
throw new ArgumentNullException("topic");
}
if (message == null)
{
throw new ArgumentNullException("message");
}
var taskId = this.GenerateTaskId();
var setter = this.taskSetterTable.Create <bool>(taskId);
var msg = message.ToStruct();
var opt = this.InitResponseOptions(taskId);
var er = MQTTAsync.MQTTAsync_sendMessage(this.handle, topic, ref msg, ref opt);
msg.Dispose();
this.EnsureSuccessCode(er);
return(setter.GetTask());
}
/// <summary>
/// 设置追踪级别
/// </summary>
/// <param name="level">级别</param>
public static void SetTraceLevel(MqttTraceLevels level)
{
MQTTAsync.MQTTAsync_setTraceLevel(level);
}