Teams Bot Framework get file attachments ?

Question

Hello,

I'm trying to build a Teams app to get file in a chat (compose box or message action) and send it to a webservice.

How can the bot read the file content ?

I can get the file contentUrl with the following code

const url = context.activity.value.messagePayload.attachments[0].contentUrl  
const response = await axios.get(url, { responseType: 'arraybuffer' });  

When I try to access it inside the bot with axios I have a HTTP 403 forbidden error.

This documentation states that I can have access to the file content when it's a personal file "The user can directly read from this URL to fetch its binary content."
https://learn.microsoft.com/en-us/microsoftteams/platform/bots/how-to/bots-filesv4#code-sample

There should be another solution by using the Microsoft Graph.
I don't understand how ?
I have the attachment ID but how do I pass it to the Microsoft Graph to read it's content ?

Thanks

Answer 1

I found out another way to do it.

https://graph.microsoft.com/v1.0/users/{from.aadObjectId}/drive/root:/{ATTACHMENTS.CONTENTURL.afterDocumentsPath}  

With this, I have the reference to the object and a "@microsoft.graph.downloadUrl" link to use with axios and download its content.

      const att = await graphClient.api("/users/a841a46f-80f6-41cd-8717-7e41d6817192/drive/root:/Microsoft%20Teams%20Chat%20Files/PDF.PDF").get();  
      const response = await axios.get(att["@microsoft.graph.downloadUrl"], { responseType: 'arraybuffer'});  
  
      const buffer64 = Buffer.from(response.data, 'binary').toString('base64');  

Answer 2

Hey @Benoit Dupont

If you are looking a way to get attachment content you can use this https://graph.microsoft.com/v1.0/me/messages/{message-id}/attachments/{attachment-id}/$value Graph API endpoint. This will allow you to Get the raw contents of attachment. Please refer to this documentation for more details also please make sure you have right permissions before using this Graph API. Please refer to the below sample screenshot from Graph Explorer.

Also if you want to get the Code Snippets for this Graph API using Graph explorer.

Hope this helps.

If the answer is helpful, please click Accept Answer and kindly upvote. If you have any further questions about this answer, please click Comment.

Answer 3

To better understand this.

I need my bot to catch the messageId and attachmentId then call the Microsoft Graph to get the content.

Does this work with messages/files from a group chat ?

What about the permissions ?
My Teams app will be on the Teams App Store.
Does each user have to update its Azure permissions for my app to access the content ?

Thanks

Answer 4

Also, I tried you exemple with the Microsoft Graph.
It doesn't seem to be working.

/messages/ are for a user's mailbox and not for Teams messages ?

Answer 5

This is the context activity

 {  
      name: 'composeExtension/fetchTask',  
      type: 'invoke',  
      timestamp: 2022-09-16T19:41:45.710Z,  
      localTimestamp: 2022-09-16T19:41:45.710Z,  
      id: 'f:07d4ae63-8070-7a80-38e2-a6ff47d2770c',  
      channelId: 'msteams',  
      serviceUrl: 'https://smba.trafficmanager.net/amer/',  
      from: {  
        id: '29:1JiEH1nLmzqH5YT7Do_1KRCs7ISDxUmVVKPbIzwM1pc884QpFbzi7GFznE58JZKe5sdjw65yzjAZtxyJt55B3mA',  
        name: 'Benoit Dupont',  
        aadObjectId: 'af24b8a2-cfe8-453a-a9b4-4a917b1534ae'  
      },  
      conversation: {  
        conversationType: 'personal',  
        tenantId: 'caafef10-9d12-4668-a0d6-268b71695e1a',  
        id: 'a:1ktMfOkUqtyhd4ub9GhZwaOdqpjjygWz5IZGvHZLTCnduBU1HmsFGO9vBAMZMQhqJOeiphjhE_k9G3HerhrBgeIf6uuA-FYRX93w_OsJYVTFX1lB36Q5xJgAGJtizZM1o'  
      },  
      recipient: {  
        id: '28:45fc30f1-94c5-48aa-b0df-ef0e41b65c6c',  
        name: 'otxmdemobot'  
      },  
      entities: [  
        {  
          locale: 'fr-CA',  
          country: 'CA',  
          platform: 'Web',  
          timezone: 'America/Halifax',  
          type: 'clientInfo'  
        }  
      ],  
      channelData: {  
        tenant: { id: 'caafef10-9d12-4668-a0d6-268b71695e1a' },  
        source: { name: 'compose' }  
      },  
      value: {  
        commandId: 'CustomForm',  
        commandContext: 'message',  
        requestId: 'cde1762b-3661-4464-b9a4-e8722b9d261b',  
        messagePayload: {  
          linkToMessage: 'https://teams.microsoft.com/l/message/19:af24b8a2-cfe8-453a-a9b4-4a917b1534ae_45fc30f1-94c5-48aa-b0df-ef0e41b65c6c@unq.gbl.spaces/1663345138603?context=%7B%22contextType%22:%22chat%22%7D',  
          id: '1663345138603',  
          replyToId: null,  
          createdDateTime: '2022-09-16T16:18:58.603Z',  
          lastModifiedDateTime: null,  
          deleted: false,  
          subject: null,  
          summary: null,  
          importance: 'normal',  
          locale: 'en-us',  
          body: [Object],  
          from: [Object],  
          reactions: [],  
          mentions: [],  
          attachments: [Array]  
        },  
        context: { theme: 'default' }  
      },  
      locale: 'fr-CA',  
      localTimezone: 'America/Halifax',  
      rawTimestamp: '2022-09-16T19:41:45.71Z',  
      rawLocalTimestamp: '2022-09-16T16:41:45.71-03:00',  
      callerId: 'urn:botframework:azure'  
    }  

And this is the activity payload

{  
  linkToMessage: 'https://teams.microsoft.com/l/message/19:af24b8a2-cfe8-453a-a9b4-4a917b1534ae_45fc30f1-94c5-48aa-b0df-ef0e41b65c6c@unq.gbl.spaces/1663344433978?context=%7B%22contextType%22:%22chat%22%7D',  
  id: '1663344433978',  
  replyToId: null,  
  createdDateTime: '2022-09-16T16:07:13.978Z',  
  lastModifiedDateTime: null,  
  deleted: false,  
  subject: null,  
  summary: null,  
  importance: 'normal',  
  locale: 'en-us',  
  body: {  
    contentType: 'html',  
    content: '<attachment id="47114f5e-b0f9-4208-9e15-b76f11ea51ab"></attachment>'  
  },  
  from: {  
    device: null,  
    conversation: null,  
    user: {  
      userIdentityType: 'aadUser',  
      id: 'af24b8a2-cfe8-453a-a9b4-4a917b1534ae',  
      displayName: 'Benoit Dupont'  
    },  
    application: null  
  },  
  reactions: [],  
  mentions: [],  
  attachments: [  
    {  
      id: '47114f5e-b0f9-4208-9e15-b76f11ea51ab',  
      contentType: 'reference',  
      contentUrl: 'https://xxwdq-my.sharepoint.com/personal/adm_xxwdq_onmicrosoft_com/Documents/Fichiers de conversation Microsoft Teams/ChannelUsageDaily.pdf',  
      content: null,  
      name: 'ChannelUsageDaily.pdf',  
      thumbnailUrl: null  
    }  
  ]  
}  

What should be the message ID and attachmentID to use with the microsoft graph ?

Thanks