Question

我正在研究基于动作的消息传递扩展。我有代码从调用该操作的消息中获取附件列表，但是我始终无法获得附件文件。

我在这里找到了看起来不错的代码： https://github.com/microsoft/botframework-sdk/issues/4466

var attachment = turnContext.Activity.Attachments.First();
using (HttpClient httpClient = new HttpClient())
{
    // Skype & MS Teams attachment URLs are secured by a JwtToken, so we need to pass the token from our bot.
    if (turnContext.Activity.ChannelId.Equals("skype", StringComparison.InvariantCultureIgnoreCase) || turnContext.Activity.ChannelId.Equals("msteams", StringComparison.InvariantCultureIgnoreCase))
    {
        var token = await new MicrosoftAppCredentials().GetTokenAsync();
        httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
    }

    var responseMessage = await httpClient.GetAsync(attachment.ContentUrl);
    var contentLenghtBytes = responseMessage.Content.Headers.ContentLength;
    await turnContext.SendActivityAsync($"Attachment of {attachment.ContentType} type and size of {contentLenghtBytes} bytes received.");
}

但是我不清楚获得令牌的路线。首先，MicrosoftAppCredentials没有空的构造函数。如果使用我的机器人应用程序的ID和密码进行尝试，则当尝试获取内容时，会出现401未经授权的错误。

我可以理解，要使用ContentUrl，我需要传递一个令牌，但是我不清楚-我需要哪种令牌以及如何在代码中获取它？

编辑：
通过单击包含文件的消息中的“更多操作”中的操作，我得到的有效负载是：

{
  "value": {
    "commandId": "doCommand",
    "commandContext": "message",
    "messagePayload": {
      "id": "1571645922015",
      "replyToId": null,
      "createdDateTime": "2019-10-21T08:18:42.015Z",
      "lastModifiedDateTime": null,
      "deleted": false,
      "subject": "",
      "summary": null,
      "importance": "normal",
      "locale": "en-us",
      "body": {
        "contentType": "text",
        "content": "Test with attachment<attachment id=\"4CBC1114-02B6-4FB5-87D4-63048312B0EC\"></attachment>"
      },
      "from": {
        "device": null,
        "conversation": null,
        "user": {
          "userIdentityType": "aadUser",
          "id": "e291b04a-f0d8-43e8-829a-499e644005e1",
          "displayName": "Amy Thorne"
        },
        "application": null
      },
      "reactions": [],
      "mentions": [],
      "attachments": [
        {
          "id": "581E8D22-2955-4DD4-8594-90F92F6737CB",
          "contentType": "reference",
          "contentUrl": "https://amythorneco.sharepoint.com/sites/AmysTeam/Shared Documents/General/Test.txt",
          "content": null,
          "name": "Test.txt",
          "thumbnailUrl": null
        }
      ]
    },
    "context": { "theme": "default" }
  },
  "conversation": { "id": "19:b7082f7e8a2547d49e0c730b9566fded@thread.skype;messageid=1571645922015" },
  "name": "composeExtension/fetchTask",
  "imdisplayname": "Amy Thorne"
}

从团队基于动作的消息扩展中获取消息附件？

0 个答案: