一、概述
上篇文章介紹了木舟如何上傳模組熱部署,那麼此篇文章將介紹如何利用HTTP網路元件接入裝置,那麼有些人會問木舟又是什麼,是什麼架構為基礎,能做什麼呢?
木舟 (Kayak) 是什麼?
木舟(Kayak)是基於.NET6.0軟體環境下的surging微服務引擎進行開發的, 平臺包含了微服務和物聯網平臺。支援非同步和響應式程式設計開發,功能包含了物模型,裝置,產品,網路元件的統一管理和微服務平臺下的註冊中心,服務路由,模組,中間服務等管理。還有多協議適配(TCP,MQTT,UDP,CoAP,HTTP,Grpc,websocket,rtmp,httpflv,webservice,等),透過靈活多樣的配置適配能夠接入不同廠家不同協議等裝置。並且透過裝置告警,訊息通知,資料視覺化等功能。能夠讓你能快速建立起微服務物聯網平臺系統。
那麼下面就為大家介紹如何從建立元件、協議、裝置閘道器,裝置到裝置閘道器接入,再到裝置資料上報,把整個流程透過此篇文章進行闡述。
二、網路元件
1.編輯建立HTTP協議的網路元件,可以選擇共享配置和獨立配置(獨立配置是叢集模式),然後可以選擇開啟swagger和webservice.
開啟成功後,可以看看swagger 是否可以訪問
又或者是訪問一下中間服務,以上篇文章上傳的Testapi 模組為例:
三、自定義協議
- 如何建立自定義協議模組
如果是網路程式設計開發,必然會涉及到協議報文的編碼解碼處理,那麼對於平臺也是做到了靈活處理,首先是協議模組建立,透過以下程式碼看出協議模組可以新增協議說明md文件, 身份鑑權處理,HTTP路由,訊息編解碼,後設資料配置。下面一一介紹如何進行編寫
public class Demo5ProtocolSupportProvider : ProtocolSupportProvider { public override IObservable<ProtocolSupport> Create(ProtocolContext context) {
var support = new ComplexProtocolSupport();
support.Id = "demo5";
support.Name = "演示協議5";
support.Description = "演示協議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. 新增協議說明文件如程式碼: support.AddDocument(MessageTransport.Http, "Document/document-http.md");,文件僅支援 markdown檔案,如下所示
### 使用HTTP推送裝置資料 上報屬性例子: POST /{productId}/{deviceId}/properties/report Authorization:{產品或者裝置中配置的Token} Content-Type: application/json { "properties":{ "temp":11.5 } } 上報事件例子: POST /{productId}/{deviceId}/event/{eventId} Authorization:{產品或者裝置中配置的Token} Content-Type: application/json { "data":{ "createtime": "" } }
2. 新增身份鑑權如程式碼: support.AddAuthenticator(MessageTransport.Http, new Demo5Authenticator()) ,自定義身份鑑權Demo5Authenticator 程式碼如下:
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, "驗證失敗,密碼錯誤")); } }); } else result = Observable.Return<AuthenticationResult>(AuthenticationResult.Failure(StatusCode.CUSTOM_ERROR, "不支援請求引數型別")); 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, "驗證失敗,密碼錯誤")); } }); return result; } }
3. 新增Http路由程式碼support.AddRoutes,那麼如何配置呢,程式碼如下:
public static BasicMessageCodec ReportProperty => new BasicMessageCodec("/*/properties/report", typeof(ReadPropertyMessage), route => route.GroupName("屬性上報") .HttpMethod("Post") .Description("上報物模型屬性資料") .Example("{\"properties\":{\"屬性ID\":\"屬性值\"}}"));
4.新增訊息編解碼程式碼 support.AddMessageCodecSupport(MessageTransport.Http, () => Observable.Return(new HttpDeviceMessageCodec())), 可以自定義編解碼,HttpDeviceMessageCodec程式碼如下:
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.新增後設資料配置程式碼 support.AddConfigMetadata(MessageTransport.Http, _httpConfig); _httpConfig程式碼如下
private readonly DefaultConfigMetadata _httpConfig = new DefaultConfigMetadata( "Http認證配置" , "token為http認證令牌") .Add("token", "token", "http令牌", StringType.Instance);
- 如何載入協議模組,協議模組包含了協議模組支援新增引用載入和上傳熱部署載入。
引用載入模組
上傳熱部署協議模組
四、裝置閘道器
建立裝置閘道器
五、產品管理
以下是新增產品。
裝置接入
六、裝置管理
新增裝置
HTTP認證配置
建立告警閾值
七、測試
利用Postman 進行測試,以呼叫http://127.0.0.1:168/{productid}/{deviceid}/properties/report 為例,Authorization設定:123456
1.正常資料測試
2. 如果是選用Get方式呼叫,會因為找不到ServiceRoute而返回錯誤。
3. 把Authorization改成1111,會返回錯誤Device not registered or authentication failed,從而上報資料失敗
以上上傳的資料可以在裝置資訊-》執行狀態中檢視
告警資訊可以在超臨界資料中檢視
七、總結
以上是基於HTTP網路元件裝置接入,現有平臺網路元件可以支援TCP,MQTT,UDP,CoAP,HTTP,Grpc,websocket,rtmp,httpflv,webservice,tcpclient, 而裝置接入支援TCP,UDP,HTTP網路元件,後面會陸續新增支援所有網路元件接入,後面我也會陸續介紹其它網路元件裝置接入 , 然後定於11月20日釋出1.0測試版平臺。也請大家到時候關注捧場。