Fiware Context Provider hello world 不工作

Question

我正在尝试将 Context Provider 注册为多个 KPI 的来源。

到目前为止，似乎注册可能有效，因为 GET http://{{orion}}/v2/registrations 返回的内容类似于我在创建时设置的内容：

{
    // each registering a new id is returned: "id": "60991a887032541f4539a71d",
    "description": "City Inhabitants",
    "dataProvided": {
        "entities": [
            {
                "id": "city.inhabitants"
                //,"type": "KeyPerformanceIndicator"
            }
        ]
    },
    "provider": {
        "http": {
            "url": "http://myhost/v2/inhabitants"
        }
        //, "legacyForwarding": false //perhaps there's a bug, cause although unset or set to false, broker still returns true.
    }
}

但是 GET http://{{orion}}/v2/entities/city.inhabitants 会导致：

{
    "error": "BadRequest",
    "description": "Service not found. Check your URL as probably it is wrong."
}

GET http://{{orion}}/v2/entities?type=KeyPerformanceIndicator 返回 [] 并且不会以任何方式调用 context-provider。

我正在从头开始编写 Node.js 应用程序，以便更好地了解 https://github.com/FIWARE/tutorials.Context-Providers 的情况，并使用教程容器作为实际的 Fiware Broker，因此所有 stores/shelf/products 都在工作但不是我的 KPI。

Answer 1

使用教程应用程序，其中微服务正在侦听 http://context-provider:3000/random/weatherConditions POST 端点。

以下注册：

curl -L -X POST 'http://localhost:1026/v2/registrations' \
-H 'Content-Type: application/json' \
--data-raw '{
   "description": "Get Weather data for KPI 1",
   "dataProvided": {
     "entities": [
       {
         "id" : "urn:ngsi-ld:KPI:010",
         "type": "KeyPerformanceIndicator"
       }
     ],
     "attrs": [
      "temperature", "relativeHumidity"
    ]
   },
   "provider": {
     "http": {
       "url": "http://context-provider:3000/random/weatherConditions"
     },
     "legacyForwarding": false
   },
   "status": "active"
}'

将为以下请求转发和检索数据：

curl -L -X GET 'http://localhost:1026/v2/entities/urn:ngsi-ld:KPI:010'

或

curl -L -X GET 'http://localhost:1026/v2/entities/?type=KeyPerformanceIndicator'

返回：

{
    "id": "urn:ngsi-ld:KPI:010",
    "type": "KeyPerformanceIndicator",
    "temperature": {
        "type": "Number",
        "value": 11,
        "metadata": {}
    },
    "relativeHumidity": {
        "type": "Number",
        "value": 39,
        "metadata": {}
    }
}

上下文代理将请求转发到 http://context-provider:3000/random/weatherConditions POST 端点，并带有以下负载：

{
 "entities": [
  {
   "id": "urn:ngsi-ld:KPI:010",
   "type": "KeyPerformanceIndicator"
  }
 ],
 "attrs": [
  "temperature",
  "relativeHumidity"
 ]
}