一、概述

上篇文章介绍了木舟通过HTTP网络组件接入设备，那么此篇文章将介绍如何利用Tcp或者UDP网络组件接入设备.

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Tcp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). 下图是解析方式选择了自定义脚本进行解码操作。

还可以选择其它解析方式：如下图

2. 编辑创建UDP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). 可以选择单播或组播。

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，消息编解码，元数据配置。下面一一介绍如何进行编写

 public class Demo3ProtocolSupportProvider : ProtocolSupportProvider
 { 
     public override IObservable<ProtocolSupport> Create(ProtocolContext context)
     {

         var support = new ComplexProtocolSupport();
         support.Id = "demo_3";
         support.Name = "演示协议3";
         support.Description = "演示协议3";
         support.AddAuthenticator(MessageTransport.Tcp, new Demo5Authenticator());
         support.AddDocument(MessageTransport.Tcp, "Document/document-tcp.md");
         support.Script = "\r\nvar decode=function(buffer)\r\n{\r\n  parser.Fixed(5).Handler(\r\n function(buffer){ \r\n      var bytes = BytesUtils.GetBytes(buffer,1,4);\r\n      var len = BytesUtils.LeStrToInt(bytes,1,4);//2. 获取消息长度.\r\n       var buf = BytesUtils.Slice(buffer,0,5); \r\n parser.Fixed(len).Result(buf); \r\n        }).Handler(function(buffer){ parser.Result(buffer).Complete();  \r\n        }\r\n )\r\n}\r\nvar encode=function(buffer)\r\n{\r\n}";       
         support.AddMessageCodecSupport(MessageTransport.Tcp, () => Observable.Return(new ScriptDeviceMessageCodec(support.Script)));
         support.AddConfigMetadata(MessageTransport.Tcp, _tcpConfig);

         support.AddAuthenticator(MessageTransport.Udp, new Demo5Authenticator()); 
         support.Script = "\r\nvar decode=function(buffer)\r\n{\r\n  parser.Fixed(5).Handler(\r\n function(buffer){ \r\n      var bytes = BytesUtils.GetBytes(buffer,1,4);\r\n      var len = BytesUtils.LeStrToInt(bytes,1,4);//2. 获取消息长度.\r\n       var buf = BytesUtils.Slice(buffer,0,5); \r\n parser.Fixed(len).Result(buf); \r\n        }).Handler(function(buffer){ parser.Result(buffer).Complete();  \r\n        }\r\n )\r\n}\r\nvar encode=function(buffer)\r\n{\r\n}";
         support.AddMessageCodecSupport(MessageTransport.Udp, () => Observable.Return(new ScriptDeviceMessageCodec(support.Script)));
         support.AddConfigMetadata(MessageTransport.Udp, _udpConfig);
         return Observable.Return(support);
     }
}

1. 添加协议说明文档如代码: support.AddDocument(MessageTransport.Tcp, "Document/document-tcp.md");，文档仅支持 markdown文件，如下所示

### 认证说明

CONNECT报文:
```text
clientId: 设备ID
password: md5(timestamp+"|"+secureKey)
 ```

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.添加消息编解码代码 support.AddMessageCodecSupport(MessageTransport.Tcp, () => Observable.Return(new ScriptDeviceMessageCodec(support.Script)));，可以自定义编解码，ScriptDeviceMessageCodec代码如下：

using DotNetty.Buffers;
using Jint;
using Jint.Parser;
using Microsoft.CodeAnalysis.Scripting;
using Microsoft.Extensions.Logging;
using RulesEngine.Models;
using Surging.Core.CPlatform.Codecs.Core;
using Surging.Core.CPlatform.Utilities;
using Surging.Core.DeviceGateway.Runtime.Device.Message;
using Surging.Core.DeviceGateway.Runtime.Device.Message.Event;
using Surging.Core.DeviceGateway.Runtime.Device.Message.Property;
using Surging.Core.DeviceGateway.Runtime.Device.MessageCodec;
using Surging.Core.DeviceGateway.Runtime.RuleParser.Implementation;
using Surging.Core.DeviceGateway.Utilities;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reactive.Linq;
using System.Reactive.Subjects;
using System.Runtime;
using System.Text;
using System.Text.Json;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Surging.Core.DeviceGateway.Runtime.Device.Implementation
{
    public class ScriptDeviceMessageCodec : DeviceMessageCodec
    {
        public string GlobalVariable { get; private set; }
        public string EncoderScript { get; private set; }
        public string DecoderScript { get; private set; }
        public IObservable<Task<RulePipePayloadParser>> _rulePipePayload;
        private readonly ILogger<ScriptDeviceMessageCodec> _logger; 
        public ScriptDeviceMessageCodec(string script) {

            _logger = ServiceLocator.GetService<ILogger<ScriptDeviceMessageCodec>>();
            RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnoreCase;
            string matchStr = Regex.Match(script, @"var\s*[\w$]*\s*\=.*function.*\(.*\)\s*\{[\s\S]*\}.*?v", options).Value;
            if (!string.IsNullOrEmpty(matchStr))
            {
                DecoderScript = matchStr.TrimEnd('v');
                DecoderScript= Regex.Replace(DecoderScript, @"var\s*[\w$]*\s*\=[.\r|\n|\t|\s]*?(function)\s*\([\w$]*\s*\)\s*\{", "", RegexOptions.IgnoreCase);
                DecoderScript= DecoderScript.Slice(0, DecoderScript.LastIndexOf('}'));
                EncoderScript = script.Replace(DecoderScript, ""); 
               
            }
             var matchStr1 = Regex.Matches(script, @"(?<=var).*?(?==)|(?=;)|(?=v)", options).FirstOrDefault(p=>!string.IsNullOrEmpty(p.Value))?.Value;
            if (!string.IsNullOrEmpty(matchStr1))
            {
                GlobalVariable = matchStr1.TrimEnd(';');
            }
            var ruleWorkflow = new RuleWorkflow(DecoderScript);
            _rulePipePayload= Observable.Return( GetParser( GetRuleEngine(ruleWorkflow), ruleWorkflow)); 
        }
        public override   IObservable<IDeviceMessage> Decode(MessageDecodeContext context)
        {
            var result = Observable.Return<IDeviceMessage>(null);
            _rulePipePayload.Subscribe(async p =>
            {
                var parser = await p;
                parser.Build(context.GetMessage().Payload);
                parser.HandlePayload().Subscribe(async p =>
                {
                    try
                    {
                        var headerBuffer=parser.GetResult().FirstOrDefault();
                        var buffer = parser.GetResult().LastOrDefault();
                        var str = buffer.GetString(buffer.ReaderIndex, buffer.ReadableBytes, Encoding.UTF8); 
                        var session = await context.GetSession();
                        if (session?.GetOperator() == null)
                        {
                            var onlineMessage = JsonSerializer.Deserialize<DeviceOnlineMessage>(str);
                            result = result.Publish(onlineMessage);
                        }
                        else
                        {
                            var messageType = headerBuffer.GetString(0, 1, Encoding.UTF8);
                            if (Enum.Parse<MessageType>(messageType.ToString()) == MessageType.READ_PROPERTY)
                            {
                                var onlineMessage = JsonSerializer.Deserialize<ReadPropertyMessage>(str);
                                result = result.Publish(onlineMessage);
                            }
                            else if (Enum.Parse<MessageType>(messageType.ToString()) == MessageType.EVENT)
                            {
                                var onlineMessage = JsonSerializer.Deserialize<EventMessage>(str);
                                result = result.Publish(onlineMessage);
                            }
                        }
                    }
                    catch (Exception e)
                    {

                    }
                    finally
                    {
                        p.Release();
                        parser.Close();
                    }
                });
            });
            return result;
        }

        public override IObservable<IEncodedMessage> Encode(MessageEncodeContext context)
        {
            context.Reply(((RespondDeviceMessage<IDeviceMessageReply>)context.Message).NewReply().Success(true));
            return Observable.Empty<IEncodedMessage>();
        }

        private RulesEngine.RulesEngine GetRuleEngine(RuleWorkflow ruleWorkflow)
        {
            var reSettingsWithCustomTypes = new ReSettings { CustomTypes = new Type[] { typeof(RulePipePayloadParser) } };
            var result = new RulesEngine.RulesEngine(new Workflow[] { ruleWorkflow.GetWorkflow() }, null, reSettingsWithCustomTypes);
            return result;
        }

        private async Task<RulePipePayloadParser> GetParser(RulesEngine.RulesEngine engine, RuleWorkflow ruleWorkflow)
        {
            var payloadParser = new RulePipePayloadParser();
            var ruleResult = await engine.ExecuteActionWorkflowAsync(ruleWorkflow.WorkflowName, ruleWorkflow.RuleName, new RuleParameter[] { new RuleParameter("parser", payloadParser) });
            if (ruleResult.Exception != null && _logger.IsEnabled(LogLevel.Error))
                _logger.LogError(ruleResult.Exception, ruleResult.Exception.Message);
            return payloadParser;
        }
    }
}

4.添加元数据配置代码 support.AddConfigMetadata(MessageTransport.Tcp, _tcpConfig); _tcpConfig代码如下:

        private readonly DefaultConfigMetadata _tcpConfig = new DefaultConfigMetadata(
        "TCP认证配置"
        , "key为tcp认证密钥")
        .Add("tcp_auth_key", "key", "TCP认证KEY", StringType.Instance);

_udpConfig代码如下:

     private readonly DefaultConfigMetadata _udpConfig = new DefaultConfigMetadata(
     "udp认证配置"
     , "key为udp认证密钥")
     .Add("udp_auth_key", "key", "TCP认证KEY", StringType.Instance);

如何加载协议模块，协议模块包含了协议模块支持自定义脚本、添加引用、上传热部署加载。

自定义脚本，选择了自定义脚本解析，如果本地有设置消息编解码，会进行覆盖

引用加载模块

上传热部署协议模块

首先利用以下命令发布模块：

然后打包上传协议模块

四、设备网关

创建TCP设备网关

创建UDP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

Tcp认证配置

添加告警阈值

事件定义

七、测试

利用测试工具进行Tcp测试，以调用tcp://127.0.0.1:993为例，

测试设备上线

字符串： 293\0\0{"MessageType":2,"Headers":{"token":"123456"},"DeviceId":"scro-34","Timestamp":1726540220311}

说明：第一个字符表示类型，第二个表示消息内容长度

16进制:32393300007b224d65737361676554797065223a322c2248656164657273223a7b22746f6b656e223a22313233343536227d2c224465766963654964223a227363726f2d3334222c2254696d657374616d70223a313732363534303232303331317d

结果如下：

测试上报属性

字符串：195\0\0{"MessageType":1,"Properties":{"temp":"38.24"},"DeviceId":"scro-34","Timestamp":1726560007339}

16进制:31393500007b224d65737361676554797065223a312c2250726f70657274696573223a7b2274656d70223a2233382e3234227d2c224465766963654964223a227363726f2d3334222c2254696d657374616d70223a313732363536303030373333397d

结果如下：

测试事件

字符串：8307\0{"MessageType":8,"Data":{"deviceId":"scro-34","level":"alarm","alarmTime":"2024-11-07 19:47:00","from":"device","alarmType":"设备告警","coordinate":"33.345,566.33","createTime":"2024-11-07 19:47:00","desc":"温度超过阈值"},"DeviceId":"scro-34","EventId":"alarm","Timestamp":1726540220311}

16进制: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

结果如下：

可以在平台界面看到上报的数据

利用测试工具进行Udp测试，以调用udp://127.0.0.1:267为例，

测试设备上线

字符串：295\0\0{"MessageType":2,"Headers":{"token":"123456"},"DeviceId":"srco-2555","Timestamp":1726540220311}

说明：第一个字符表示类型，第二个表示消息内容长度

16进制:32393500007b224d65737361676554797065223a322c2248656164657273223a7b22746f6b656e223a22313233343536227d2c224465766963654964223a227372636f2d32353535222c2254696d657374616d70223a313732363534303232303331317d

结果如下：

测试上报属性

字符串：197\0\0{"MessageType":1,"Properties":{"temp":"38.24"},"DeviceId":"srco-2555","Timestamp":1726560007339}

说明：第一个字符表示类型，第二个表示消息内容长度

16进制:31393700007b224d65737361676554797065223a312c2250726f70657274696573223a7b2274656d70223a2233382e3234227d2c224465766963654964223a227372636f2d32353535222c2254696d657374616d70223a313732363536303030373333397d

结果如下：

测试事件

字符串：8301\0{"MessageType":8,"Data":{"deviceId":"srco-2555","level":"alarm","alarmTime":"2024-11-07 19:47:00","from":"device","alarmType":"设备告警","coordinate":"33.345,566.33","createTime":"2024-11-07 19:47:00","desc":"温度超过阈值"},"DeviceId":"srco-2555","EventId":"alarm","Timestamp":1726540220311}

说明：第一个字符表示类型，第二个表示消息内容长度

16进制: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

结果如下：

可以在平台界面看到上报的数据

七、总结

以上是基于Tcp和UDP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，年前尽量完成国标28181和MQTT，也会开始着手开始开发规则引擎，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。