Why I do not receive the attachments in the Facebook Messenger webhook request?

问题

Since yesterday (29/10/2020) i'm having this problem only on one of the pages linked to my app, the others work correctly:

The attached messages that the webhook receives from Facebook do not contain the attachment field. Only messages with stickers contain the "attachment" field. All others (image, video, audio etc.) No.

What I expect (as facebook documentation) is:

{
  "id": "682498302938465",
  "time": 1518479195594,
  "messaging": [
    {
      "sender": {
        "id": "<PSID>"
      },
      "recipient": {
        "id": "<PAGE_ID>"
      },
      "timestamp": 1518479195308,
      "message": {
        "mid": "mid.$cAAJdkrCd2ORnva8ErFhjGm0X_Q_c",
        "attachments": [
          {
            "type": "<image|video|audio|file>",
            "payload": {
              "url": "<ATTACHMENT_URL>"
            }
          }
        ]
      }
    }
  ]
}

but I only receive:

{
    "object": "page",
    "entry": [
        {
            "id": "119320008135788",
            "time": 1604051633128,
            "messaging": [
                {
                    "sender": {
                        "id": "XXXXXX"
                    },
                    "recipient": {
                        "id": "XXXXXX"
                    },
                    "timestamp": 1604051632953,
                    "message": {
                        "mid": "m_7DRP...."
                    }
                }
            ]
        }
    ]
}

This only happens on one page from 29/10/2020

Does anyone have the same problem / know why it happens?

回答1:

The Facebook support team has confirmed my problem, and is investigating.

I am now solving using the graph api to get the desired message information using the mid

GET /v8.0/{message-id} HTTP/1.1
Host: graph.facebook.com

https://developers.facebook.com/docs/graph-api/reference/v8.0/message

Ex.

GET 

https://graph.facebook.com/v8.0/' + mid + '?fields=message%2Cfrom%2Csticker%2Ctags%2Cid%2Cattachments.limit(10)%7Bid%2Cimage_data%2Cmime_type%2Cname%2Cfile_url%2Cvideo_data%7D&access_token=XXXXXX

来源：https://stackoverflow.com/questions/64608272/why-i-do-not-receive-the-attachments-in-the-facebook-messenger-webhook-request