在逻辑应用程序中解析 JSON

Question

我正在尝试访问 Azure Logic APPS Json 主体中的隐藏值。我有来自 HTTP 响应的 json 正文，我想访问隐藏的值，我不知道如何访问它。

一般来说，我们将使用以下代码访问Python中的隐藏值：

body.data.alertContext.condition.allOf.dimentions[0].value

演示 JSON

”Headers”:{},
“body”{
  "schemaId": "azureMonitorCommonAlertSchema",
  "data": {
    "essentials": {
      "alertId": "/subscriptions/<subscription ID>/providers/Microsoft.AlertsManagement/alerts/b9569717-bc32-442f-add5-83a997729330",
      "alertRule": "WCUS-R2-Gen2",
      "severity": "Sev3",
      "signalType": "Metric",
      "monitorCondition": "Resolved",
      "monitoringService": "Platform",
      "alertTargetIDs": [
        "/subscriptions/<subscription ID>/resourcegroups/pipelinealertrg/providers/microsoft.compute/virtualmachines/wcus-r2-gen2"
      ],
      "configurationItems": [
        "wcus-r2-gen2"
      ],
      "originAlertId": "3f2d4487-b0fc-4125-8bd5-7ad17384221e_PipeLineAlertRG_microsoft.insights_metricAlerts_WCUS-R2-Gen2_-117781227",
      "firedDateTime": "2019-03-22T13:58:24.3713213Z",
      "resolvedDateTime": "2019-03-22T14:03:16.2246313Z",
      "description": "",
      "essentialsVersion": "1.0",
      "alertContextVersion": "1.0"
    },
    "alertContext": {
      "properties": null,
      "conditionType": "SingleResourceMultipleMetricCriteria",
      "condition": {
        "windowSize": "PT5M",
        "allOf": [
          {
            "metricName": "Percentage CPU",
            "metricNamespace": "Microsoft.Compute/virtualMachines",
            "operator": "GreaterThan",
            "threshold": "25",
            "timeAggregation": "Average",
            "dimensions": [
              {
                "name": "ResourceId",
                "value": "3efad9dc-3d50-4eac-9c87-8b3fd6f97e4e"
              }
            ],
            "metricValue": 7.727
          }
        ]
      }
    },
    "customProperties": {
      "Key1": "Value1",
      "Key2": "Value2"
    }
  }
}

由于专业原因，我无法分享 json 响应。我如何编写表达式来访问此字符串值并将其设置为 azure 逻辑应用程序中的变量

Answer 1

我的答案的开头取决于您想要从中提取数据的操作类型，但我将假设它是来自 HTTP 操作的响应。

您需要使用方括号和单引号来表示您想要的内容。您需要使用这样的语法...

body('HTTP')['data']['alertContext']['condition']['allOf']['dimensions'][0]['value']

...或者您可以使用

Parse JSON

，但如果 JSON 的结构可能不同，那么您需要调整您的架构，以便它能够满足它。

此链接有帮助...

https://learn.microsoft.com/en-us/azure/logic-apps/logic-apps-workflow-definition-language#expressions