/// <summary>
/// Gets a command
/// </summary>
/// <param name="device">Device data of the device that is getting a command</param>
/// <param name="onlyUnprocessed">Get commands with empty status only</param>
/// <returns>Command data structure or null if there are no pending commands</returns>
/// <remarks>
/// This method returns all the commands that are waiting at the server since last GetCommand call. It returns immediately, regardless if there are commands to execute or not.
/// </remarks>
public DeviceCommand GetCommand(Device device, bool onlyUnprocessed = true)
{
if (CommandQueue.Count != 0)
{
return (DeviceCommand)CommandQueue.Dequeue();
}
string TimeString = UriExtensions.EscapeDataString(LastTimeStamp);
string Url = CloudUrl + DeviceCommand + device.id.ToString() + PollCommandName + TimeString + "&waitTimeout=0";
byte[] bts = null;
WebResponse resp = MakeRequest(Url, null, GetMethod, device.id.ToString(), device.key);
if (resp.ContentType.IndexOf(ContentType) >= 0)
{
if (resp.ContentLength > 0)
{
using (Stream rs = resp.GetResponseStream())
{
bts = new byte[(int)rs.Length];
rs.Read(bts, 0, bts.Length);
rs.Close();
}
}
}
resp.Close();
if (bts != null)
{
JsonFormatter js = new JsonFormatter();
object o = js.FromJson(bts, typeof(DeviceCommand));
DeviceCommand dc = o as DeviceCommand;
if (dc != null && (!onlyUnprocessed || StringExtensions.IsNullOrEmpty(dc.status)))
{
return dc;
}
ArrayList al = o as ArrayList;
if (al != null)
{
if (al.Count == 0) return null;
for (int x = 0; x < al.Count; ++x)
{
dc = (DeviceCommand)al[x];
if (!onlyUnprocessed || StringExtensions.IsNullOrEmpty(dc.status))
{
CommandQueue.Enqueue(dc);
}
}
DeviceCommand ldc = (DeviceCommand)al[al.Count - 1];
LastTimeStamp = ldc.timestamp;
return CommandQueue.Count == 0 ? null : (DeviceCommand)CommandQueue.Dequeue();
}
}
return null;
}
/// <summary>
/// Gets API info.
/// </summary>
/// <returns><see cref="ApiInfo"/> object.</returns>
public ApiInfo GetApiInfo()
{
byte[] bts = null;
HttpWebResponse resp = MakeRequest(CloudUrl + InfoCommand, null, GetMethod, null, null) as HttpWebResponse;
if (resp.ContentType.IndexOf(ContentType) >= 0)
{
if (resp.ContentLength > 0)
{
using (Stream rs = resp.GetResponseStream())
{
bts = new byte[(int)rs.Length];
rs.Read(bts, 0, bts.Length);
rs.Close();
}
}
}
resp.Close();
if (bts != null)
{
JsonFormatter js = new JsonFormatter();
object o = js.FromJson(bts, typeof(ApiInfo));
ApiInfo ai = o as ApiInfo;
if (ai != null)
{
return ai;
}
}
throw new Exception("Unknown error while getting ApiInfo.");
}
/// <summary>
/// Gets a command
/// </summary>
/// <param name="device">Device data of the device that is getting a command</param>
/// <returns>Command data structure or null if there are no pending commands</returns>
/// <remarks>
/// This method returns all the commands that are waiting at the server since last GetCommand call. It returns immediately, regardless if there are commands to execute or not.
/// </remarks>
public DeviceCommand GetCommand(Device device)
{
if (CommandQueue.Count != 0)
{
return (DeviceCommand)CommandQueue.Dequeue();
}
string TimeString = LastTimeStamp.ToString("yyyy-MM-ddTHH\\%3Amm\\%3Ass.fff000");
string Url = CloudUrl + DeviceCommand + device.id.ToString() + GetCommandName + TimeString;
byte[] bts = null;
WebResponse resp = MakeRequest(Url, null, GetMethod, device.id.ToString(), device.key);
if (resp.ContentType.IndexOf(ContentType) >= 0)
{
if (resp.ContentLength > 0)
{
using (Stream rs = resp.GetResponseStream())
{
bts = new byte[(int)rs.Length];
rs.Read(bts, 0, bts.Length);
rs.Close();
}
}
}
resp.Close();
if (bts != null)
{
JsonFormatter js = new JsonFormatter();
object o = js.FromJson(bts, typeof(DeviceCommand));
DeviceCommand dc = o as DeviceCommand;
if (dc != null && dc.status.IsNullOrEmpty())
{
return dc;
}
ArrayList al = o as ArrayList;
if (al != null)
{
if (al.Count == 0) return null;
for (int x = 0; x < al.Count; ++x)
{
dc = (DeviceCommand)al[x];
if (dc.status.IsNullOrEmpty())
{
CommandQueue.Enqueue(dc);
}
}
DeviceCommand ldc = (DeviceCommand)al[al.Count - 1];
LastTimeStamp = ldc.timestamp;
//LastTimeStamp += new TimeSpan(0, 0, 0, 0, 1);
return CommandQueue.Count == 0 ? null : (DeviceCommand)CommandQueue.Dequeue();
}
}
return null;
}
private WebResponse MakeRequest(string url, object obj, string Method, string id, string key)
{
//lock (this)
//{
Debug.Print("Request: " + url);
using (HttpWebRequest req = HttpWebRequest.Create(url) as HttpWebRequest)
{
req.Method = Method;
req.ContentType = ContentType;
req.KeepAlive = false;
req.Headers.Add(IdHeader, id);
req.Headers.Add(KeyHeader, key);
req.ReadWriteTimeout = AsyncTimeout;
req.Timeout = AsyncTimeout;
if (obj != null)
{
JsonFormatter js = new JsonFormatter();
string s = js.ToJson(obj);
req.ContentLength = s.Length;
using (Stream rs = req.GetRequestStream())
{
rs.Write(Encoding.UTF8.GetBytes(s), 0, s.Length);
rs.Close();
}
}
HttpWebResponse resp = GetResponseAsync(req); //(HttpWebResponse)req.GetResponse(); //
Debug.Print("Done. Response code = " + resp.StatusCode.ToString());
return resp;
}
}
// Obsolete!
/// <summary>
/// Polls command for execution
/// </summary>
/// <param name="device">Device data of the device that is polling a command</param>
/// <returns>Command data structure or null if there are no commands</returns>
/// <remarks>
/// This method returns the next command from the command queue. If there are no commands in the queue, it waits for ~30 seconds to receive a new command.
/// </remarks>
public DeviceCommand PollCommand(Device device)
{
if (CommandQueue.Count != 0)
{
return (DeviceCommand)CommandQueue.Dequeue();
}
//string TimeString = time.Year.ToString() + "-"
// + time.Month.ToString() + "-"
// + time.Day.ToString() + "T"
// + time.Hour.ToString() + ":"
// + time.Minute.ToString() + ":"
// + time.Second.ToString();
string Url = CloudUrl + DeviceCommand + device.id.ToString() + PollCommandName;// +TimeString;
byte[] bts = null;
WebResponse resp = MakeRequest(Url, null, GetMethod, device.id.ToString(), device.key);
if (resp.ContentType.IndexOf(ContentType) > 0)
{
if (resp.ContentLength > 0)
{
using (Stream rs = resp.GetResponseStream())
{
bts = new byte[(int)rs.Length];
rs.Read(bts, 0, bts.Length);
rs.Close();
}
}
}
resp.Close();
if (bts != null)
{
JsonFormatter js = new JsonFormatter();
object o = js.FromJson(bts, typeof(DeviceCommand));
DeviceCommand dc = o as DeviceCommand;
if (dc != null)
{
return dc;
}
ArrayList al = o as ArrayList;
if (al != null)
{
if (al.Count == 0) return null;
for (int x = 1; x < al.Count; ++x)
{
CommandQueue.Enqueue(al[x]);
}
return (DeviceCommand)al[0];
}
}
return null;
}
