dgiot/apps/dgiot_dlink/README.md

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# Dlink协议
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Dlink协议是针对物联网开发领域设计的一种数据交换规范数据格式是JSON用于设备端和物联网平台的双向通信更便捷地实现和规范了设备端和物联网平台之间的业务数据交互。
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## 协议框架
![dlink proctol.png](http://dgiot-1253666439.cos.ap-shanghai-fsi.myqcloud.com/shuwa_tech/zh/backend/dgiot/dlink%20proctol.png)
+ 设备层和用户层隔离,物理层和逻辑层隔离
+ 用户层mqtt权限与openApi权限保持一致性
+ 设备侧topic交互采用 {productId}/{deviceAddr}的组合来唯一标识设备, deviceAddr为设备物理地址
+ 用户侧topic交互采用{deviceId}来唯一标识设备,用{userId}来唯一标识用户,deviceId为设备虚拟地址
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### 鉴权设计
+ %u 表示用Username做ACL规则
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+ %c 表示用clientId做ACL规则
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- 用户侧clientId用Token做ACL规则, Token是dgiot用户登录权限系统的token,与API权限一致
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- 设备侧clientId为{productId}_{deviceAddr},或者 deviceAddr, 必须保证clientId的唯一性
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| 客户端 | Username | Password | ClientId | 登录鉴权| 订阅ACL | 发布ACL|
| -------- | -------- | ------- | -------- |-------- | ------- | -------- |
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| Device |{productId}|{productSecret}|clientId| 一型一密 | $dg/device/%u/# | $dg/thing/%u/# |
| Device |{productId}|{deviceSecret}|clientId| 一机一密 | $dg/device/%u/%d/# | $dg/thing/%u/%c/# |
| Device |{productId}|{productSecret}|clientId| 证书加密 | $dg/device/%u/# | $dg/thing/%u/# |
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| User |{userId}|{Token}|{Token}| Token认证 | $dg/user/%c/# | $dg/thing/%c/# |
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## topic设计
| 分类 | Topic | 发布者 | 订阅者 |
| -------- | -------- | ------- | -------- |
| 属性上报 |$dg/thing/{productId}/{deviceAddr}/properties/report|设备|平台|
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| 告警上报 |$dg/user/alarm/{productId}/{deviceId}/properties/report|平台|用户|
| 组态消息 |$dg/user/konva/{DeviceId}/report|平台|用户|
| 卡片消息 | $dg/user/realtimecard/{DeviceId}/report|平台|用户|
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| 设备状态消息 | $dg/user/devicestate/{DeviceId}/report |平台|用户|
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| 子属性上报 |$dg/thing/{productId}/{deviceAddr}/gateway/sub_devices/properties/report|设备|平台|
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| 子属性上报 |$dg/user/gateway/{deviceId}/sub_devices/properties/report|平台|用户|
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| 属性设置 | $dg/thing/{deviceId}/properties/set/request_id={request_id}|用户|平台|
| 属性设置 | $dg/device/{productId}/{deviceAddr}/properties/set/request_id={request_id}|平台|设备|
| 属性设置 |$dg/thing/{productId}/{deviceAddr}/properties/set/request_id={request_id}|设备|平台|
| 属性设置 |$dg/user/{deviceId}/properties/set/request_id={request_id}|平台|用户|
| 属性获取 |$dg/thing/{deviceId}/properties/get/request_id={request_id}|用户|平台|
| 属性获取 |$dg/device/{productId}/{deviceAddr}/properties/get/response/request_id={request_id}|平台|设备|
| 属性获取 |$dg/thing/{productId}/{deviceAddr}/properties/get/response/request_id={request_id}|设备|平台|
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| 属性获取 |$dg/user/{deviceId}/properties/get/request_id={request_id}|平台|用户|
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| 属性获取 |$dg/thing/{productId}/{deviceAddr}/shadow/get/request_id={request_id}|设备|平台|
| 属性获取 |$dg/device/{productId}/{deviceAddr}/shadow/get/request_id={request_id}|平台|设备|
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| 属性采集 |$dg/device/{productId}/{deviceAddr}/properties|平台|设备|
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| 配置下发 |$dg/device/{productId}/{deviceAddr}/profile|平台|设备|
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| 事件上报 |$dg/thing/{productId}/{deviceAddr}/events|设备|平台|
| 事件上报 |$dg/user/{deviceId}/events|平台|用户|
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| 通道消息 |$dg/user/channel/{channelId}/{productId}/{deviceId}|平台|用户|
| 通道设置 |$dg/user/channel/{channelId}/commands/request_id={request_id}|用户|平台|
| 通道设置 |$dg/user/channel/{channelId}/commands/response/request_id={request_id}|平台|用户|
| 大屏消息 |$dg/user/dashboard/{dashboardId}/{productId}/{deviceId}|平台|用户|
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| 组态大屏 |$dg/user/topo/{SessionToken}/{NodeType}/{NodeId}/report|平台|app|
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| 云云对接 |$dg/bridge/{bridgetopic}|平台|平台|
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| 设备初始化请求 |$dg/thing/{productId}/{deviceAddr}/init/request|设备|平台|
| 设备初始化响应 |$dg/device/{productId}/{deviceAddr}/init/response|平台|设备|
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| taos 默认topic |$dg/taos/tdpool/{clientId}/# |平台|taos|
| taos sql |$dg/taos/tdpool/{clientId}/sql |平台|taos|
| taos 调试模式 |$dg/taos/tdpool/{clientId}/debug |平台|taos|
| taos 设置连接参数 |$dg/taos/tdpool/{clientId}/connect |平台|taos|
| taos sql执行结果 |$dg/thing/taos/{clientId} |taos|平台|
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## payload设计
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### 属性上报 ($dg/thing/{productId}/{deviceAddr}/properties/report)
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+ dlink json格式
```json
{
"Power": "on",
"WF": 23.6
}
```
+ 透传/自定义
```
00002233441232013fa00000
```
### 事件上报 $dg/thing/{productId}/{deviceAddr}/events
```json
{
"Power": "on",
"WF": 23.6
}
```
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## 通道接入
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### grpc2tpc桥接
+ https://gitee.com/dgiiot/dgiot/tree/master/apps/dgiot_dlink/priv/example/java
----------------------------------------------------------------------------
Dlink RunTime Third-party Decode/Encode
+================================+ +========+==========+
| Dlink | | | |
| +--------------+--------- ---+ | gRPC | gRPC | User's |
| + tpc server | gPRC Client |---------------> | Server | Codes |
| +--------------|-------------+ | (HTTP/2) | | |
| | | | |
+================================+ +========+==========+
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### http server
### http client
### mqtt client
### mqtt bridge
### tcp client
### udp server
### udp client
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+ 支持grpc多语言编解码
```
Dlink RunTime Third-party Decode/Encode
+========================+ +========+==========+
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| Dlink | | | |
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| +----------------+ | gRPC | gRPC | User's |
| | gPRC Client | ------------------> | Server | Codes |
| +----------------+ | (HTTP/2) | | |
| | | | |
+========================+ +========+==========+
```
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### gRPC
For instructions on how to use the language-specific gRPC runtime for a project,
please refer to these documents
- [C++](https://github.com/fastdgiot/grpc/tree/master/src/cpp): follow the instructions under the `src/cpp` directory
- [C#](https://github.com/fastdgiot/grpc/tree/master/src/csharp): NuGet package `Grpc`
- [Dart](https://github.com/grpc/grpc-dart): pub package `grpc`
- [Go](https://github.com/grpc/grpc-go): `go get google.golang.org/grpc`
- [Java](https://github.com/grpc/grpc-java): Use JARs from Maven Central
Repository
- [Kotlin](https://github.com/grpc/grpc-kotlin): Use JARs from Maven Central
Repository
- [Node](https://github.com/grpc/grpc-node): `npm install grpc`
- [Objective-C](https://github.com/fastdgiot/grpc/tree/master/src/objective-c): Add `gRPC-ProtoRPC` dependency to podspec
- [PHP](https://github.com/fastdgiot/grpc/tree/master/src/php): `pecl install grpc`
- [Python](https://github.com/fastdgiot/grpc/tree/master/src/python/grpcio): `pip install grpcio`
- [Ruby](https://github.com/fastdgiot/grpc/tree/master/src/ruby): `gem install grpc`
- [WebJS](https://github.com/grpc/grpc-web): follow the grpc-web instructions