python - Azure函数应用程序: Microsoft. Azure.WebJobs.EventHubs : Value cannot be null.(参数 'receiverConnectionString')

Question

我遵循以下结构，但上传功能应用程序后，我遇到错误:

https://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-event-iot-trigger?tabs=python

错误:

函数(转换/EventHubTrigger1)错误:Microsoft.Azure.WebJobs.Host:索引方法“Functions.EventHubTrigger1”出错。 Microsoft.Azure.WebJobs.EventHubs:值不能为空。 (参数“receiverConnectionString”)。 session ID:cb179cdab03c4e8c80f1f82d9da9d143

时间戳:2020-03-11T15:55:55.575Z

<小时/>

Function.json :
{
  "scriptFile": "__init__.py",
  "bindings": [
    {
      "type": "eventHubTrigger",
      "name": "event",
      "direction": "in",
      "eventHubName": "iothub-ehub-neas-hub-xxx-xxxx",
      "connection": "Endpoint=sb://xxxxxxxxxxxx.servicebus.windows.net/;SharedAccessKeyName=iothubowner;SharedAccessKey=xxxxxxxxxxx=;EntityPath=iothub-ehub-neas-hub-xxxxxx-856659355a",
      "cardinality": "many",
      "consumerGroup": "$Default"
    }
  ]
}

Answer 1

您需要将端点信息放入 local.settings.json 中并从 function.json 中引用它。 XXXX只是为了显示更多。连接字符串是您在事件中心门户中获得的内容。我在节点中设置时遇到了同样的问题。

Local.settings.json

{
  "IsEncrypted": false,
  "Values": {
    "FUNCTIONS_WORKER_RUNTIME": "node",
    "AzureEventHubConnectionString": "Endpoint=XXXX",
    "AzureWebJobsStorage": "DefaultEndpointsProtocol=XXXX"
  }
}

然后在你的 function.json 中

{
  "bindings": [
    {
      "type": "eventHubTrigger",
      "name": "IoTHubMessages",
      "direction": "in",
      "eventHubName": "<event hub name you have>",
      "connection": "AzureEventHubConnectionString",
      "cardinality": "many",
      "consumerGroup": "$Default"
    }
  ]
}

这将消除 receiveConnectionString 错误。