发布到事件网格时将 header Content-Type 更改为 application/cloudevents+json

Question

我使用触发器 "When a HTTP request is received" 然后使用 "Publish Event" 操作将多个事件发布到事件网格。 For 循环可以很好地拆分进入的 JSON 并创建要发布的事件，但发布仍然失败

{
  "error": {
    "code": "UnsupportedMediaType",
    "message": "The Content-Type header is either missing or it doesn't have a valid value. The content type header must either be application/cloudevents+json; charset=utf-8 or application/cloudevents-batch+json; charset=UTF-8. Report 'edf36bbd-9221-4882-8a29-2264ffb16d72:3:3/6/2020 2:18:20 PM (UTC)' to our forums for assistance or raise a support ticket.",
    "details": [
      {
        "code": "InvalidContentType",
        "message": "The Content-Type header is either missing or it doesn't have a valid value. The content type header must either be application/cloudevents+json; charset=utf-8 or application/cloudevents-batch+json; charset=UTF-8. Report 'edf36bbd-9221-4882-8a29-2264ffb16d72:3:3/6/2020 2:18:20 PM (UTC)' to our forums for assistance or raise a support ticket."
      }
    ]
  }
}

我假设在发布时使用了输入中的 header，所以我尝试在发布时通过更改 Publish_Event 块中的 header 来更改 header如下（直接在代码视图中，因为它在 UI 中不受支持）所以我得到以下内容（添加了 headers 部分）：

"Publish_Event": {
    "inputs": {
        "body": [
            {
                "data": "@items('For_each_2')",
                "eventType": "company-location",
                "id": "ID : @{items('For_each')['businessId']}",
                "subject": "Company Location changed"
            }
        ],
        "headers": {
            "Content-Type": "application/cloudevents+json; charset=utf-8"
        },
        "host": {
            "connection": {
                "name": "@parameters('$connections')['azureeventgridpublish']['connectionId']"
            }
        },
        "method": "post",
        "path": "/eventGrid/api/events"
    },
    "runAfter": {},
    "type": "ApiConnection"
}

但这也不起作用。没有找到进行更改的操作。

我的完整流程是这样的：

作为测试数据，我有以下 JSON 我用邮递员发送（有点简化）：

[
    {
        "id": 3603,
        "businessId": "QQTADOSH",
        "locations": [
            {
                "id": 5316,
                "businessId": "A-yelr3g"
            },
            {
                "id": 5127,
                "businessId": "A-c7i8gd"
            },
            {
                "id": 5403,
                "businessId": "A-fjdd2y"
            },
            {
                "id": 6064,
                "businessId": "A-rqvhz8"
            }
        ]
    },
    {
        "id": 3118,
        "businessId": "Cr11_Macan_111qa",
        "locations": [
            {
                "id": 4563,
                "businessId": "A-3bv860"
            }
        ]
    }
]

Answer 1

看起来像 Official Event Grid Publish Connector doesn't support Cloud Events Schema。

您可以设置主题接受Event Grid Schema，但我相信这只有在创建时才有可能。

最好打开一个feature request on UserVoice to add support for this and in the meantime, a workaround would be to use an HTTP Action to Post to Custom Topic。

但请注意，解决方法将涉及构建要发送的事件负载（以及获取访问密钥 from Key Vault 而不是直接将其存储在您的工作流程中).

发布到事件网格时将 header Content-Type 更改为 application/cloudevents+json

change the header Content-Type to application/cloudevents+json when publishing to event grid

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