CoAP响应不包含远程发送方的定义
本文关键字：定义 程发送 包含远 响应 CoAP | 更新日期: 2023-09-27 18:15:05
我正在尝试在Visual Studio 2015中使用CoAPSharp二进制文件制作CoAP非服务器。我的目标设备是带有Windows IoT核心的树莓派。
"Remotesender"部分出现错误。我不知道如何解决它
/// <summary>
/// Called when a request is received
/// </summary>
/// <param name="coapReq">The CoAPRequest object</param>
void OnCoAPRequestReceived(CoAPRequest coapReq)
{
//This sample only works on NON requests of type GET
//This sample simualtes a temperature sensor at the path "sensors/temp"
string reqURIPath = (coapReq.GetPath() != null) ? coapReq.GetPath ().ToLower() : "";
/**
* Draft 18 of the specification, section 5.2.3 states, that if against a NON message,
* a response is required, then it must be sent as a NON message
*/
if (coapReq.MessageType.Value != CoAPMessageType.NON)
{
//only NON combination supported..we do not understand this send a RST back
CoAPResponse msgTypeNotSupported = new CoAPResponse (CoAPMessageType.RST, /*Message type*/
CoAPMessageCode.NOT_IMPLEMENTED, /*Not implemented*/
coapReq.ID.Value /*copy message Id*/);
msgTypeNotSupported.Token = coapReq.Token; //Always match the request/response token
msgTypeNotSupported.RemoteSender = coapReq.RemoteSender;
//send response to client
this._coapServer.Send(msgTypeNotSupported);
}
else if (coapReq.Code.Value != CoAPMessageCode.GET)
{
//only GET method supported..we do not understand this send a RST back
CoAPResponse unsupportedCType = new CoAPResponse (CoAPMessageType.RST, /*Message type*/
CoAPMessageCode.METHOD_NOT_ALLOWED, /*Method not allowed*/
coapReq.ID.Value /*copy message Id*/);
unsupportedCType.Token = coapReq.Token; //Always match the request/response token
unsupportedCType.RemoteSender = coapReq.RemoteSender;
//send response to client
this._coapServer.Send(unsupportedCType);
}
else if (reqURIPath != "sensors/temp")
{
//classic 404 not found..we do not understand this send a RST back
CoAPResponse unsupportedPath = new CoAPResponse (CoAPMessageType.RST, /*Message type*/
CoAPMessageCode.NOT_FOUND, /*Not found*/
coapReq.ID.Value /*copy message Id*/);
unsupportedPath.Token = coapReq.Token; //Always match the request/response token
unsupportedPath.RemoteSender = coapReq.RemoteSender;
//send response to client
this._coapServer.Send(unsupportedPath);
}
else
{
//All is well...send the measured temperature back
//Again, this is a NON message...we will send this message as a JSON
//string
Hashtable valuesForJSON = new Hashtable();
valuesForJSON.Add("temp", this.GetRoomTemperature());
string tempAsJSON = JSONResult.ToJSON(valuesForJSON);
//Now prepare the object
CoAPResponse measuredTemp = new CoAPResponse(CoAPMessageType.NON, /*Message type*/
CoAPMessageCode.CONTENT, /*Carries content*/
coapReq.ID.Value/*copy message Id*/);
measuredTemp.Token = coapReq.Token; //Always match the request/response token
//Add the payload
measuredTemp.Payload = new CoAPPayload(tempAsJSON);
//Indicate the content-type of the payload
measuredTemp.AddOption(CoAPHeaderOption.CONTENT_FORMAT,
AbstractByteUtils.GetBytes(CoAPContentFormatOption.APPLICATION_JSON));
//Add remote sender address details
measuredTemp.RemoteSender = coapReq.RemoteSender;
//send response to client
this._coapServer.Send(measuredTemp);
}
}
错误:CS1061 c#不包含for的定义，也找不到接受类型的第一个参数的扩展方法(您是否缺少using指令或程序集引用?)
只需遵循CoAPSharp官方网站的教程。
如果您想在带有Windows 10 IoT核心的树莓派上运行CoAPSharp库，您需要下载Windows 10 IoT核心的实验版本。URL为http://www.coapsharp.com/releases/。参见最后一个下载链接。
另外，您可能希望获得源代码并重新编译以获得最新的二进制文件，以便在主项目中引用。
2016年11月3日新增信息:好了，我明白问题出在哪里了。这里是一个完整的大答案:-)
-
CoAPSharp实验库有一个小bug(虽然与你的问题无关)。我是CoAPSharp的开发人员之一，为建立这个库的公司工作。带有修复程序的更新库应该在一两天内可用。问题是同步接收。
-
你正在尝试运行的样本，是NETMF，而不是Windows 10物联网核心，这就是为什么你得到的错误。树莓派的实验版本没有样本。为了帮助你解决这个问题，我给出了下面一步一步的解决方案:
-
首先，下载最新的CoAPSharp实验库来修复同步接收错误
-
接下来，创建一个解决方案，在其中创建一个UWA项目并将CoAPSharp库添加到解决方案中。在西澳大学项目中引用图书馆。
/// <summary>
/// We will start a server locally and then connect to it
/// </summary>
private void TestLocalCoAPServer()
{
/*_coapServer variable is a class level variable*/
_coapServer = new CoAPServerChannel();
_coapServer.CoAPRequestReceived += OnCoAPRequestReceived;
_coapServer.Initialize(null, 5683);
}
/// <summary>
/// Gets called everytime a CoAP request is received
/// </summary>
/// <param name="coapReq">The CoAP Request object instance</param>
private async void OnCoAPRequestReceived(CoAPRequest coapReq)
{
//send ACK back
Debug.WriteLine("Received Request::" + coapReq.ToString());
CoAPResponse coapResp = new CoAPResponse(CoAPMessageType.ACK, CoAPMessageCode.CONTENT, coapReq);
coapResp.AddPayload("GOT IT!");
await _coapServer.Send(coapResp);
}
5.2接下来，确保树莓派上的5683端口没有被阻塞。如果是，则使用powershell解除阻塞。
5.3接下来，在桌面上创建一个新的解决方案(我使用Windows 10和Visual Studio 2015社区版)，并添加另一个CoAPSharp树莓派实验库的副本。
现在在桌面上创建另一个UWA项目。同时，在这个新项目中引用CoAPSharp项目。5.4现在在这个项目中编写一个客户端，它将从托管在树莓派上的服务器发送/接收CoAP消息:
private async void TestCoAPAsyncClient()
{
/*_coapAsyncClient is declared at class level*/
this._coapAsyncClient = new CoAPClientChannel();
/*minwinpc was the name of the device running Windows IoT core on Raspberry Pi*/
this._coapAsyncClient.Initialize("minwinpc", 5683);
this._coapAsyncClient.CoAPError += delegate (Exception e, AbstractCoAPMessage associatedMsg) {
Debug.WriteLine("Exception e=" + e.Message);
Debug.WriteLine("Associated Message=" + ((associatedMsg != null) ? associatedMsg.ToString() : "NULL"));
};
this._coapAsyncClient.CoAPRequestReceived += delegate (CoAPRequest coapReq) {
Debug.WriteLine("REQUEST RECEIVED !!!!!!!!!!!!!!" + coapReq.ToString());
};
this._coapAsyncClient.CoAPResponseReceived += delegate (CoAPResponse coapResp) {
Debug.WriteLine("RESPONSE RECEIVED <<<<<<<<<<<<<" + coapResp.ToString());
};
CoAPRequest req = new CoAPRequest(CoAPMessageType.CON, CoAPMessageCode.GET, 100);
//req.SetURL("coap://capi.coapworks.com:5683/v1/time/pcl?mid=CPWK-TESTM");
req.SetURL("coap://localhost:5683/someurl");
await this._coapAsyncClient.Send(req);
}
你可以在点击按钮或加载页面时调用TestCoAPAsyncClient()方法。
我使用的设置是，一个桌面与Windows 10和Visual Studio社区版2015。这是连接到运行Windows 10 IoT核心(操作系统:10.0.10240.16384)的树莓派。我的台式机和树莓派都连接到了以太网。
CoAPSharp团队在链接http://www.coapsharp.com/coap-server-windows-10-iot-core-raspberry-pi/添加了一个示例来进一步阐述。