mosescha1972 commented on issue #38460:
URL: https://github.com/apache/superset/issues/38460#issuecomment-4009001863
Limitation of the current webhook payload
The raw body received by the webhook looks like this:
{
"name": "test8: Table",
"header": {
"notification_format": "TEXT",
"notification_type": "Alert",
"notification_source": "chart",
"chart_id": 73,
"dashboard_id": null
},
"text": null,
"description": null,
"url":
"http://:8888/explore/?form_data=%7B%22slice_id%22:+73%7D&force=true";
}
This payload does not contain any file-related information (such as a
PNG/PDF file, file URL, or binary data).
Because of this, it is not possible to implement a proxy server that uploads
files to Mattermost.
The proxy server only receives metadata such as the chart name, description,
and explore URL. Without a file reference or attachment in the webhook payload,
the proxy cannot retrieve or forward a file to Mattermost.
To support file uploads via a proxy server, the webhook payload would need
to include one of the following:
A file URL (PNG/PDF) generated by Superset
A downloadable attachment reference
Base64-encoded file data
Without such information in the payload, the proxy server can only forward
text messages, not files.
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