Uploads a file's contents, associating it with the attachment metadata instance with the given ID. The request body is simply the file's bytes. If a file was already uploaded for the attachment with the given ID, that file will be overwritten.

Permissions

---

To use this endpoint, the user is required to have the Forms Comment (Forms_CommentAccess) permission for the iTwin, or for the issue's associated form definition if form definition security is specified. (Having Create/Modify, Assign, Approve, or Full permission automatically grants the Comment permission as well.)

Authentication

---

Requires Authorization header with valid Bearer token for scope itwin-platform.

For more documentation on authorization and how to get access token visit OAUTH2 Authorization page.

{
    "error": {
        "code": "HeaderNotFound",
        "message": "Header Authorization was not found in the request. Access denied."
    }
}

{
    "error": {
        "code": "AttachmentNotFound",
        "message": "Requested attachment is not available.",
        "target": "attachmentId"
    }
}

{
    "error": {
        "code": "RequestTooLarge",
        "message": "Provided file is greater than the max length of 30MB."
    }
}

{
    "error": {
        "code": "RateLimitExceeded",
        "message": "The client sent more requests than allowed by this API for the current tier of the client."
    }
}