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一、概述
上篇文章介绍了木舟如何上传模块热部署，那么此篇文章将介绍如何利用HTTP网络组件接入设备，那么有些人会问木舟又是什么，是什么架构为基础，能做什么呢？
木舟 (Kayak) 是什么?
木舟(Kayak)是基于.NET6.0软件环境下的surging微服务引擎进行开发的, 平台包含了微服务和物联网平台。支持异步和响应式编程开发，功能包含了物模型,设备,产品,网络组件的统一管理和微服务平台下的注册中心，服务路由，模块，中间服务等管理。还有多协议适配(TCP,MQTT,UDP,CoAP,HTTP,Grpc,websocket,rtmp,httpflv,webservice,等),通过灵活多样的配置适配能够接入不同厂家不同协议等设备。并且通过设备告警,消息通知,数据可视化等功能。能够让你能快速建立起微服务物联网平台系统。
那么下面就为大家介绍如何从创建组件、协议、设备网关，设备到设备网关接入，再到设备数据上报，把整个流程通过此篇文章进行阐述。
二、网络组件
1.编辑创建HTTP协议的网络组件，可以选择共享配置和独立配置(独立配置是集群模式)，然后可以选择开启swagger和webservice.
开启成功后，可以看看swagger 是否可以访问
又或者是访问一下中间服务，以上篇文章上传的Testapi 模块为例：
三、自定义协议
- 如何创建自定义协议模块
如果是网络编程开发，必然会涉及到协议报文的编码解码处理，那么对于平台也是做到了灵活处理，首先是协议模块创建，通过以下代码看出协议模块可以添加协议说明md文档, 身份鉴权处理，HTTP路由,消息编解码，元数据配置。下面一一介绍如何进行编写
public class Demo5ProtocolSupportProvider : ProtocolSupportProvider { public override IObservable<ProtocolSupport> Create(ProtocolContext context) {
var support = new ComplexProtocolSupport();
support.Id = "demo5";
support.Name = "演示协议5";
support.Description = "演示协议5"; support.AddDocument(MessageTransport.Http, "Document/document-http.md"); support.AddAuthenticator(MessageTransport.Http, new Demo5Authenticator()); support.AddRoutes(MessageTransport.Http, new List<BasicMessageCodec>() { BasicMessageCodec.DeviceOnline, BasicMessageCodec.ReportProperty, BasicMessageCodec.WriteProperty, BasicMessageCodec.ReadProperty, BasicMessageCodec.Event }.Select(p => HttpDescriptor.Instance(p.Pattern) .GroupName(p.Route.GroupName()) .HttpMethod(p.Route.HttpMethod()) .Path(p.Pattern) .ContentType(MediaType.ToString(MediaType.ApplicationJson)) .Description(p.Route.Description()) .Example(p.Route.Example()) ).ToList()); support.AddMessageCodecSupport(MessageTransport.Http, () => Observable.Return(new HttpDeviceMessageCodec())); support.AddConfigMetadata(MessageTransport.Http, _httpConfig); return Observable.Return(support); } }
1. 添加协议说明文档如代码: support.AddDocument(MessageTransport.Http, "Document/document-http.md");，文档仅支持 markdown文件，如下所示
### 使用HTTP推送设备数据 上报属性例子: POST /{productId}/{deviceId}/properties/report Authorization:{产品或者设备中配置的Token} Content-Type: application/json { "properties":{ "temp":11.5 } } 上报事件例子: POST /{productId}/{deviceId}/event/{eventId} Authorization:{产品或者设备中配置的Token} Content-Type: application/json { "data":{ "createtime": "" } }
2. 添加身份鉴权如代码: support.AddAuthenticator(MessageTransport.Http, new Demo5Authenticator()) ，自定义身份鉴权Demo5Authenticator 代码如下：
public class Demo5Authenticator : IAuthenticator { public IObservable<AuthenticationResult> Authenticate(IAuthenticationRequest request, IDeviceOperator deviceOperator) { var result = Observable.Return<AuthenticationResult>(default); if (request is DefaultAuthRequest) { var authRequest = request as DefaultAuthRequest; deviceOperator.GetConfig(authRequest.GetTransport()==MessageTransport.Http?"token": "key").Subscribe( config => { var password = config.Convert<string>(); if (authRequest.Password.Equals(password)) { result= result.Publish(AuthenticationResult.Success(authRequest.DeviceId)); } else { result= result.Publish(AuthenticationResult.Failure(StatusCode.CUSTOM_ERROR, "验证失败,密码错误")); } }); } else result = Observable.Return<AuthenticationResult>(AuthenticationResult.Failure(StatusCode.CUSTOM_ERROR, "不支持请求参数类型")); return result; } public IObservable<AuthenticationResult> Authenticate(IAuthenticationRequest request, IDeviceRegistry registry) { var result = Observable.Return<AuthenticationResult>(default); var authRequest = request as DefaultAuthRequest; registry .GetDevice(authRequest.DeviceId) .Subscribe(async p => { var config= await p.GetConfig(authRequest.GetTransport() == MessageTransport.Http ? "token" : "key"); var password= config.Convert<string>(); if(authRequest.Password.Equals(password)) { result= result.Publish(AuthenticationResult.Success(authRequest.DeviceId)); } else { result= result.Publish(AuthenticationResult.Failure(StatusCode.CUSTOM_ERROR, "验证失败,密码错误")); } }); return result; } }
3. 添加Http路由代码support.AddRoutes，那么如何配置呢，代码如下：
public static BasicMessageCodec ReportProperty => new BasicMessageCodec("/*/properties/report", typeof(ReadPropertyMessage), route => route.GroupName("属性上报") .HttpMethod("Post") .Description("上报物模型属性数据") .Example("{"properties":{"属性ID":"属性值"}}"));
4.添加消息编解码代码 support.AddMessageCodecSupport(MessageTransport.Http, () => Observable.Return(new HttpDeviceMessageCodec()))， 可以自定义编解码，HttpDeviceMessageCodec代码如下：
public class HttpDeviceMessageCodec : DeviceMessageCodec { private readonly MessageTransport _transport; public HttpDeviceMessageCodec() : this(MessageTransport.Http) { } private static DefaultHttpResponseMessage Unauthorized(String msg) { return new DefaultHttpResponseMessage() .ContentType(MediaType.ApplicationJson) .Body("{"success":false,"code":"unauthorized","message":"" + msg + ""}") .Status(HttpStatus.AuthorizationFailed); } private static DefaultHttpResponseMessage BadRequest() { return new DefaultHttpResponseMessage() .ContentType(MediaType.ApplicationJson) .Body("{"success":false,"code":"bad_request"}") .Status(HttpStatus.RequestError); } public HttpDeviceMessageCodec(MessageTransport transport) { _transport = transport; } public override IObservable<IDeviceMessage> Decode(MessageDecodeContext context) { if (context.GetMessage() is HttpRequestMessage) { return DecodeHttpRequestMessage(context); } return Observable.Return<IDeviceMessage>(default); } public override IObservable<IEncodedMessage> Encode(MessageEncodeContext context) { return Observable.Return<IEncodedMessage>(default); } private IObservable<IDeviceMessage> DecodeHttpRequestMessage(MessageDecodeContext context) { var result = Observable.Return<IDeviceMessage>(default); var message = (HttpExchangeMessage)context.GetMessage(); Header? header = message.Request.GetHeader("Authorization"); if (header == null || header.Value == null || header.Value.Length == 0) { message .Response(Unauthorized("Authorization header is required")).ToObservable() .Subscribe(p => result = result.Publish(default)); return result; } var httpToken = header.Value[0]; var paths = message.Path.Split("/"); if (paths.Length == 0) { message.Response(BadRequest()).ToObservable() .Subscribe(p => result = result.Publish(default)); return result; } String deviceId = paths[1]; context.GetDevice(deviceId).Subscribe(async deviceOperator => { var config = deviceOperator==null?null: await deviceOperator.GetConfig("token"); var token = config?.Convert<string>(); if (token == null || !httpToken.Equals(token)) { await message .Response(Unauthorized("Device not registered or authentication failed")); } else { var deviceMessage = await DecodeBody(message, deviceId); if (deviceMessage != null) { await message.Success("{"success":true,"code":"success"}"); result = result.Publish(deviceMessage); } else { await message.Response(BadRequest()); } } }); return result; } private async Task<IDeviceMessage> DecodeBody(HttpExchangeMessage message,string deviceId) { byte[] body = new byte[message.Payload.ReadableBytes]; message.Payload.ReadBytes(body); var deviceMessage = await TopicMessageCodec.Dodecode(message.Path, body); deviceMessage.DeviceId = deviceId; return deviceMessage; } }
5.添加元数据配置代码 support.AddConfigMetadata(MessageTransport.Http, _httpConfig); _httpConfig代码如下
private readonly DefaultConfigMetadata _httpConfig = new DefaultConfigMetadata( "Http认证配置" , "token为http认证令牌") .Add("token", "token", "http令牌", StringType.Instance);
- 如何加载协议模块，协议模块包含了协议模块支持添加引用加载和上传热部署加载。
引用加载模块
上传热部署协议模块
四、设备网关
创建设备网关
五、产品管理
以下是添加产品。
设备接入
六、设备管理
添加设备
HTTP认证配置
创建告警阈值
七、测试
利用Postman 进行测试，以调用http://127.0.0.1:168/{productid}/{deviceid}/properties/report 为例，Authorization设置：123456
1.正常数据测试
2. 如果是选用Get方式调用，会因为找不到ServiceRoute而返回错误。
3. 把Authorization改成1111，会返回错误Device not registered or authentication failed，从而上报数据失败
以上上传的数据可以在设备信息-》运行状态中查看
告警信息可以在超临界数据中查看
七、总结
以上是基于HTTP网络组件设备接入，现有平台网络组件可以支持TCP,MQTT,UDP,CoAP,HTTP,Grpc,websocket,rtmp,httpflv,webservice,tcpclient, 而设备接入支持TCP，UDP，HTTP网络组件，后面会陆续添加支持所有网络组件接入，后面我也会陆续介绍其它网路组件设备接入 ， 然后定于11月20日发布1.0测试版平台。也请大家到时候关注捧场。
