/// <summary>
/// Called when a CoAP request is received...we will only support CON requests
/// of type GET... the path is sensors/temp
/// </summary>
/// <param name="coapReq">CoAPRequest object</param>
private static void OnCoAPRequestReceived(CoAPRequest coapReq)
{
string reqPath = (coapReq.GetPath() != null) ? coapReq.GetPath().ToLower() : "";
if (coapReq.MessageType.Value == CoAPMessageType.CON)
{
if (coapReq.Code.Value != CoAPMessageCode.GET)
{
CoAPResponse resp = new CoAPResponse(CoAPMessageType.ACK,
CoAPMessageCode.METHOD_NOT_ALLOWED,
coapReq /*Copy all necessary values from request in the response*/);
//When you use the constructor that accepts a request, then automatically
//the message id , token and remote sender values are copied over to the response
coapServer.Send(resp);
}
else if (reqPath != "sensors/temp")
{
//We do not understand this..
CoAPResponse resp = new CoAPResponse(CoAPMessageType.ACK,
CoAPMessageCode.NOT_FOUND,
coapReq /*Copy all necessary values from request in the response*/);
coapServer.Send(resp);
}
else
{
Debug.WriteLine(coapReq.ToString());
CoAPResponse resp = new CoAPResponse(CoAPMessageType.ACK,
CoAPMessageCode.CONTENT,
coapReq /*Copy all necessary values from request in the response*/);
//The payload will be JSON
Hashtable ht = new Hashtable();
ht.Add("temp", GetRoomTemperature());
string jsonStr = JSONResult.ToJSON(ht);
resp.AddPayload(jsonStr);
//Tell recipient about the content-type of the response
resp.AddOption(CoAPHeaderOption.CONTENT_FORMAT, AbstractByteUtils.GetBytes(CoAPContentFormatOption.APPLICATION_JSON));
//send it
coapServer.Send(resp);
}
}
}
/// <summary>
/// Called when a CoAP request is received (NON, CON)
/// </summary>
/// <param name="coapReq">CoAPRequest object</param>
private static void OnCoAPRequestReceived(CoAPRequest coapReq)
{
string reqPath = (coapReq.GetPath() != null) ? coapReq.GetPath().ToLower() : "";
/*
* For well-know path, we should support both CON and NON.
* For NON request, we send back the details in another NON message
* For CON request, we send back the details in an ACK
*/
/*Well known should be a GET*/
if (coapReq.Code.Value != CoAPMessageCode.GET)
{
if (coapReq.MessageType.Value == CoAPMessageType.CON)
{
CoAPResponse resp = new CoAPResponse(CoAPMessageType.ACK,
CoAPMessageCode.METHOD_NOT_ALLOWED,
coapReq /*Copy all necessary values from request in the response*/);
//When you use the constructor that accepts a request, then automatically
//the message id , token and remote sender values are copied over to the response
coapServer.Send(resp);
}
else
{
//For NON, we can only send back a RST
CoAPResponse resp = new CoAPResponse(CoAPMessageType.RST,
CoAPMessageCode.METHOD_NOT_ALLOWED,
coapReq /*Copy all necessary values from request in the response*/);
//When you use the constructor that accepts a request, then automatically
//the message id , token and remote sender values are copied over to the response
coapServer.Send(resp);
}
}
else
{
//Message type is GET...check the path..this server only supports well-known path
if (reqPath != ".well-known/core")
{
if (coapReq.MessageType.Value == CoAPMessageType.CON)
{
CoAPResponse resp = new CoAPResponse(CoAPMessageType.ACK,
CoAPMessageCode.NOT_FOUND,
coapReq /*Copy all necessary values from request in the response*/);
coapServer.Send(resp);
}
else
{
//For NON, we can only send back a RST
CoAPResponse resp = new CoAPResponse(CoAPMessageType.RST,
CoAPMessageCode.NOT_FOUND,
coapReq /*Copy all necessary values from request in the response*/);
coapServer.Send(resp);
}
}
else
{
//Request is GET and path is right
if (coapReq.MessageType.Value == CoAPMessageType.CON)
{
CoAPResponse resp = new CoAPResponse(CoAPMessageType.ACK,
CoAPMessageCode.CONTENT,
coapReq /*Copy all necessary values from request in the response*/);
//Add response payload
resp.AddPayload(GetSupportedResourceDescriptions());
//Tell recipient about the content-type of the response
resp.AddOption(CoAPHeaderOption.CONTENT_FORMAT, AbstractByteUtils.GetBytes(CoAPContentFormatOption.APPLICATION_LINK_FORMAT));
coapServer.Send(resp);
}
else
{
//Its a NON, send a NON back...in CoAPSharp, NON is always considered as request
CoAPResponse resp = new CoAPResponse(CoAPMessageType.NON,
CoAPMessageCode.CONTENT,
coapReq.ID.Value);
//Copy over other needed values from the reqeust
resp.Token = coapReq.Token;
resp.RemoteSender = coapReq.RemoteSender;
resp.AddPayload(GetSupportedResourceDescriptions());
//Tell recipient about the content-type of the response
resp.AddOption(CoAPHeaderOption.CONTENT_FORMAT, AbstractByteUtils.GetBytes(CoAPContentFormatOption.APPLICATION_LINK_FORMAT));
//send it
coapServer.Send(resp);
}
}
}
}
