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
- 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);
}
}- 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)
```- 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。
