Messages sent to data channel via REST API are delivered twice

[petarb1988]

Short description

When using the REST API to send a message to the stream's data channel, the message is delivered twice.
NOTE: the data channel setting is that messages are distributed to the publisher and all players.

Environment

• Operating system and version: Ubuntu 20.04.6 LTS (GNU/Linux 5.8.0-63-generic x86_64)
• Java version: openjdk version "17.0.10" 2024-01-16
• Ant Media Server version: Enterprise Edition 2.9.0 20240405_1755
• Browser name and version:

Steps to reproduce

1. Send a message to REST API (https://{antmediaserver.base.url}/v2/broadcasts/{streamId}/data)

Expected behavior

The message should be received once.

Actual behavior

The message is received twice by the viewer/callback URL (this part is incorrect), and once by the streamer (this part is correct).

[burak-58]

Hi @petarb1988,
Thanks for reporting the issue. I need to understand scenario better. Can you tell me how I can reproduce it with sample pages? Are you using WebRTC publish and play pages or conference page? Where and how you call data REST method?

[petarb1988]

We're using mobile only so far but I have tested the issue with the Play page on an active stream and a test message sent through the REST data channel API - https://{antmediaserver.base.url}/WebRTCAppEE/rest/v2/broadcasts/{streamId}/data (the link in the original post is wrong, my mistake) - also is printed twice in the data channel messages.

So set up a working stream, access it through the Play page, click Options so the data channel messages box opens and send a message using the API URL I mentioned above. It should print once in the messages box but it prints twice.