The way I read Umesh's question is not to send out-of-band to admin
console, but messaging within the guac client itself.  For example, say
multiple users are connected to the same remote session.  A side pane would
allow them to facilitate a chat.

My example from a previous post was around session sharing.  As an admin I
can jump into any active session without the session owner's permission.
Would prompting the session owner to allow admin to jump into user's
session be a guac protocol or a webserver implementation?

Chris

On Sun, Apr 12, 2020 at 7:11 AM Nick Couchman <[email protected]> wrote:

> On Sun, Apr 12, 2020 at 3:40 AM Umesh Bhatt <[email protected]> wrote:
>
>> Hi,
>>
>>
>>
>> I want to push notification messages in end user VM similar like
>> Guacamole slow or unstable network messages.
>>
>> Can you pls let me know if Restful APIs are available for this?
>>
>>
>>
>
> There is no current implementation for sending "out-of-band" messages like
> this from the Guacamole system to the remote server.
>
> The Guacamole protocol itself could easily support such a feature, it
> would just need to be implemented as a channel within Guacamole.  However,
> the ability to implement it for the remote server(s) would depend upon the
> protocol you're using and its ability to support such "out-of-band"
> messages on the remote system - things that are not normal
> Keyboard/Mouse/Video messages.  SSH can probably do this in some form or
> fashion.  RDP has support for implementing arbitrary data channels, so it
> should be possible, there, as well.  VNC probably would not support it, and
> neither would Telnet.  Also, the ability for the remote system to do
> something with the messages would also require something listening on the
> remote system for the messages - an agent of some sort - that is able to
> receive the out-of-band messages and do something with them - display a
> message to the user, etc.
>
> Can you describe your use-case a little bit more - what messages you'd
> want to send back to the remote system, and why you'd need to send and/or
> display them on the remote system?
>
> -Nick
>

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