Thank you for your answer!
I started looking at the documentation, but I'm not sure, yet.
If I unserstand correctly, it would be best to write an extension.
The extension will override then predefined functions where I can put my
additional functionality.
I assume I'll need to find the correct positions for my functions to start.
As Java is not a regular language of mine, could you hint me to to a
position in the sources or offer a small example?
I wasn't able to find an example of the decorate functions, yet (I
searched in the code for now).
Thanks!
Kai
Am 18.11.23 um 01:01 schrieb Michael Jumper:
On 11/17/2023 1:18 PM, Kai wrote:
Hello,
I came across Guacamole some days ago and I'm quite impressed about
how quick I got an example running.
Originally, I was planning on doing some connections to virtual
machines behind a gateway by using a remote desktop client with some
scripts, but the web solution can be more convenient.
As virtualization I use Proxmox and I have some dedicated VMs only
running some old software without internet.
They also shouldn't be running all the time for power and performance
reasons.
I'm connecting to them by RDP and also tried this in Guacamole.
I currently use some easy scripts to startup and suspend the machines
before and after a RDP session.
What could be the best way for me to integrate running some
additional script? I looked at the wake-on-lan as example.
I saw that the client web application only collects these information
and the server application does the waiting and sending within C code.
As I can easily control the Proxmox VMs by using the Proxmox Rest
API, I only plan to integrate some http requests before showing the
RDP and after closing it. My idea was to integrate these requests
somewhere in the client web application, but I didn't see a good way,
yet.
Are there suggestions what position would be best?
You can hook into the connection process for any connection by
leveraging decoration to wrap the connection objects returned by other
extensions:
https://guacamole.apache.org/doc/guacamole-ext/org/apache/guacamole/net/auth/AuthenticationProvider.html#decorate(org.apache.guacamole.net.auth.UserContext,org.apache.guacamole.net.auth.AuthenticatedUser,org.apache.guacamole.net.auth.Credentials)
https://guacamole.apache.org/doc/guacamole-ext/org/apache/guacamole/net/auth/AuthenticationProvider.html#redecorate(org.apache.guacamole.net.auth.UserContext,org.apache.guacamole.net.auth.UserContext,org.apache.guacamole.net.auth.AuthenticatedUser,org.apache.guacamole.net.auth.Credentials)
Wrapping a Connection and its connect() implementation will allow you
to hook in before a connection is established, while overriding the
close() function of the returned GuacamoleTunnel will allow you to
hook into when the connection is closed down. You just need to make
sure that your implementation correctly *unwraps* any wrapped objects
before they are passed to Directory functions like update(), as
implementations may expect to receive objects of the same type that
they returned via a previous call to get(). You can use
DecoratingDirectory to make this much easier to do correctly:
https://guacamole.apache.org/doc/guacamole-ext/org/apache/guacamole/net/auth/DecoratingDirectory.html
It is also possible to inject arbitrary connection attributes at the
UserContext level such that administrators are presented with
additional configuration options when creating/updating a connection,
if that's something you're looking to do.
- Mike
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