Yes that works!
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From: Lukáš Raška <lukasra...@gmail.com>
Date: Wednesday, 2 April 2025 at 18:22
To: user@guacamole.apache.org <user@guacamole.apache.org>
Subject: Re: Guacamole client .onrequired
Hi,
you need to follow similar logic as within ManagedClient, which Nick already
sent. In the onrequire instruction you receive list of required arguments (e.g
the whole instruction can look like
"8.required,8.username,6.domain,8.password;", which means you need to send
username, domain and password).
You then need to send each of the required instructions (I believe the value
can be empty, at least for domain that seems to work) and that is achieved
using ArgumentValueStream as used in the "ManagedClient.sendArguments" method.
So if you receive only password in the required instruction, you just need to
do:
var stream = guacamoleclient.createArgumentValueStream("text/plain",
"password");
var writer = new Guacamole.StringWriter(stream);
writer.sendText("the actual password for the connection");
writer.sendEnd();
But if you receive username, domain and password in the required instruction,
you need to do the same for every argument separately - the second argument in
createArgumentValueStream is the actual argument name as received in the
required instruction.
And only once you send all the required arguments, the connection will continue
(so you just can't skip those you don't want to handle).
Lukas
st 2. 4. 2025 v 16:09 odesílatel Gal Sabas <gal...@checkpoint.com.invalid>
napsal:
I’m using guacamole-common-js to create my Guacamole client and listen to
different events like .onrequired but I don’t see a way to use my
guacamole-common utils to implement this functionality.
Any ideas?
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From: Gal Sabas <gal...@checkpoint.com.INVALID>
Date: Monday, 31 March 2025 at 13:28
To: user@guacamole.apache.org<mailto:user@guacamole.apache.org>
<user@guacamole.apache.org<mailto:user@guacamole.apache.org>>
Subject: Re: Guacamole client .onrequired
I see that guacamole-client uses ‘ManagedClient.sendArguments’ but
sendArguments’ needs to receive ManagedClient so I’m not sure how to use it in
my code.
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From: Nick Couchman <vn...@apache.org<mailto:vn...@apache.org>>
Date: Wednesday, 26 March 2025 at 12:05
To: user@guacamole.apache.org<mailto:user@guacamole.apache.org>
<user@guacamole.apache.org<mailto:user@guacamole.apache.org>>
Subject: Re: Guacamole client .onrequired
On Wed, Mar 26, 2025 at 4:07 AM Gal Sabas <gal...@checkpoint.com.invalid> wrote:
Hi,
I have my own web-client that is based on guacamole-client.
I’m trying to add support to the “required” request for parameter prompting, I
added this code to my client:
let client = new Guacamole.Client(tunnel)
client.onrequired = function(params) {
…
client.send(credentials);
}
For some reason, no matter what I send through the credentials, guacd don’t
seem to accept them. Do I need to disconnect from the client and then connect
again with the credentials?
Can someone please help me and maybe provide an example for and .onrequired?
The official Guacamole Client code uses this:
https://github.com/apache/guacamole-client/blob/78e0436dc202673686dc8a7741eca6cb21513d77/guacamole/src/main/frontend/src/app/client/types/ManagedClient.js#L720-L728<https://protect.checkpoint.com/v2/r02/___https:/github.com/apache/guacamole-client/blob/78e0436dc202673686dc8a7741eca6cb21513d77/guacamole/src/main/frontend/src/app/client/types/ManagedClient.js%23L720-L728___.YzJlOmNwYWxsOmM6bzo1M2RhZWQyNTY1NWNiZDZkMzc3ZjBjNjc4Y2M1MjkxYzo3OmIzMzI6MzA2YTM4YjUxNjhhNDhlNjU5MTc4MWQ4YTlhYWM3OTY4ZjVjZjZmNTVhNzI0NjcxYThjNTU2YjRmNTQ2MDUyNjpoOlQ6Tg>
I'd highly suggest going through the Guacamole Client code, particularly for
the AngularJS front-end, to see how it is handled in there - this block only
takes care of letting the client know that a required instruction has been sent
and prompting the user - you have to go to a couple of other places to see
where the user is actually prompted and where those responses are actually sent
back to guacd.
And to answer your question, no, there is no need to disconnect and reconnect -
in the cases where guacd sends the "required" instruction, it is usually
because there is a call-back function from one of the supported protocols being
invoked that needs more information and is now waiting on that information to
be provided.
I know that's a very high-level answer - feel free to post back with more
specific/detailed questions.
-Nick
--
Best Regards
Lukáš Raška
