Google Assistant Dialogflow API V2 webhook ETag 错误

我正在尝试返回简单的文本响应并使用以下代码在 Google Assistant 应用程序中显示基本卡片：

public GoogleCloudDialogflowV2WebhookResponse Search(GoogleCloudDialogflowV2WebhookRequest request)
    {
        GoogleCloudDialogflowV2WebhookResponse whr = new GoogleCloudDialogflowV2WebhookResponse();

        whr.FulfillmentMessages = new List<GoogleCloudDialogflowV2IntentMessage>();

        whr.FulfillmentMessages.Add(new GoogleCloudDialogflowV2IntentMessage()
        {                
            Platform = "ACTIONS_ON_GOOGLE",
            SimpleResponses = new GoogleCloudDialogflowV2IntentMessageSimpleResponses()
            {
               SimpleResponses = new List<GoogleCloudDialogflowV2IntentMessageSimpleResponse>()
               {
                   new GoogleCloudDialogflowV2IntentMessageSimpleResponse()
                   {
                       DisplayText = "sample text",
                       Ssml = "<speak>sample text</speak>"
                   }
               }
            },
            BasicCard = new GoogleCloudDialogflowV2IntentMessageBasicCard()
            {             
                Title = "sample title",
                Subtitle = "sample subtitle",
                FormattedText = "sample formatted text",
                Image = new GoogleCloudDialogflowV2IntentMessageImage()
                {                 
                    ImageUri = "https://assistant.google.com/static/images/molecule/Molecule-Formation-stop.png",
                    AccessibilityText = "sample image"
                }
            }
        });

        return whr;
    }

从 Google Dialogflow 界面调用 Webhook 端点时出现以下错误：

webhookStatus": {
"code": 3,
"message": "Webhook call failed. Error: Failed to parse webhook JSON response: Cannot find field: ETag in message google.cloud.dialogflow.v2beta1.Intent.Message.Image." }

我找不到有关 ETag 问题的任何信息。我正在使用标准 Google.Apis.Dialogflow.v2 NuGet 包和 V2 API Dialogflow 代理。

如果我不使用 GoogleCloudDialogflowV2WebhookResponse 并使用自定义类，那么当序列化为 JSON 时，无需基本卡即可正常工作。

{ "fulfillmentText": "test from API", "fulfillmentMessages": [ { "platform": "ACTIONS_ON_GOOGLE", "simpleResponses": { "simpleResponses": [ { "displayText": "test", "ssml": "<speak>test</speak>"}],}}],}

我更喜欢使用 GoogleCloudDialogflowV2WebhookResponse。

根据https://github.com/google/google-api-dotnet-client/issues/1234 https://github.com/google/google-api-dotnet-client/issues/1234, use https://www.nuget.org/packages/Google.Cloud.Dialogflow.V2/1.0.0-beta01 https://www.nuget.org/packages/Google.Cloud.Dialogflow.V2/1.0.0-beta01代替https://www.nuget.org/packages/Google.Apis.Dialogflow.v2/ https://www.nuget.org/packages/Google.Apis.Dialogflow.v2/.

请注意，Gooogle.Cloud 包仍然是预发布版本，因此您必须在安装时指定版本，或者如果您在 Visual Studio 中使用 NuGet 包管理器 UI，请单击小“包含预发布”复选框。

我自己还没有尝试过，所以你的里程可能会有所不同。一旦我尝试过，我就会更新。

Update：Google.Cloud 库确实按预期工作。