Message Behaviour Changed from 3.10 on

Message appearance changed from version 3.10 on

Using the API to send some test messages I've found that the message behaviour changed from 3.10 on (3.11 and 3.12 and 3.12.1 act the same way).

On 3.10 we had the following

As 3.11 and up we've got the following result:

Steps to reproduce:

1. Send an API call:
   I've used the following curl command at file
   envia-msg-rc.txt

in short, the curl call below does the "magic":
`
curl -s -H "X-Auth-Token: $AUTHTOKEN"
-H "X-User-Id: $USERID"
-H "Content-type:application/json"
${SERVER}/api/v1/chat.postMessage
-d "{
"alias": "Gruggy",
"avatar": "http://res.guggy.com/logo_128.png\",
"channel": "#${CHANNEL}",
"emoji": "😏",
"text": "Sample message",
"attachments": [
{
"audio_url": "http://www.w3schools.com/tags/horse.mp3",
"author_icon": "https://avatars.githubusercontent.com/u/850391?v=3",
"author_link": "https://rocket.chat/",
"author_name": "Bradley Hilton",
"collapsed": false,
"color": "#ff0000",
"fields": [
{
"short": true,
"title": "Test",
"value": "Testing out something or other"
},
{
"short": true,
"title": "Another Test",
"value": "Link something and this and that."
}
],
"image_url": "https://www.confianca.com.br/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/1/1/114520-7.jpg.jpg\",
"message_link": "https://google.com\",
"text": "Yay for Manga!",
"thumb_url": "http://individual.icons-land.com/IconsPreview/3D-Food/PNG/128x128/Berry_Strawberry.png\",
"title": "Attachment Example",
"title_link": "https://www.youtube.com/watch?v=9i_9hse_Y08\",
"title_link_download": true,
"ts": "2020-12-09T16:53:06.761Z",
"video_url": "http://www.w3schools.com/tags/movie.mp4\"
}
]
}" | jq '.'

`

Expected behavior:

I expect that the message still displays the same way as it does in 3.10 and below

Actual behavior:

As 3.11 and up we've got the following result:

Server Setup Information:

• Version of Rocket.Chat Server: from 3.10 and up
• Operating System: Linux
• Deployment Method: docker

Client Setup Information

• Desktop App or Browser Version: Google Chrome 87.0.4280.88 (Versão oficial) 64 bits and other versions
• Operating System: Linux

Thanks in advance

LEslie

Start by replaying the curl request from envia-msg-rc.txt against the chat.postMessage API and compare the attachment rendering between the stated versions. Trace the message and attachment handling entry points involved in that endpoint. Done means the supplied attachment payload renders as expected without regressing the newer behavior.