Ah, ok. I did not do the following from the Guac server:


$ ./guacctl -o "test-pipe"; echo -n "hello world"; ./guacctl -c


I thought the pipe would be available as part of the SSH or Telnet connection 
being established and the text coming from the connected device would be 
available in the pipe. I was hoping to access the text data at the javascript 





From: Mike Jumper <mike.jum...@guac-dev.org>
Reply-To: "user@guacamole.apache.org" <user@guacamole.apache.org>
Date: Wednesday, February 21, 2018 at 2:07 PM
To: "user@guacamole.apache.org" <user@guacamole.apache.org>
Subject: EXT: Re: Working with pipes


Yes, onpipe should be firing for pipe streams created in this way. To 
demonstrate general usage and expectations here, I've created a quick topic 
branch to act as a temporary POC which adds handling for "text/plain" pipe 
streams, logging their creation, closure, and any data received along the 




After establishing an SSH connection via a Guacamole server having the above 
commit, I ran the following one-liner to open a new pipe stream called 
"test-pipe", print "hello world" while output is redirected to that pipe 
stream, and finally close the stream:


    $ ./guacctl -o "test-pipe"; echo -n "hello world"; ./guacctl -c


The log within the browser displayed:


    pipe: test-pipe: stream begins

    pipe: test-pipe: "hello world"

    pipe: test-pipe: stream ends


and withing guacd:



    guacd[3374]: DEBUG: Terminal output now redirected to pipe 'test-pipe'.

    guacd[3374]: DEBUG: Terminal output now redirected to display.



- Mike



On Wed, Feb 21, 2018 at 6:48 AM, McRoy, Jeffrey (GE Healthcare) 
<jeffrey.mc...@ge.com> wrote:

If the Guac server is opening a pipe stream and redirecting output to it, 
wouldn’t the onpipe event fire in the Guac client?


guacClient.onpipe = function(input_stream, mimetype, name) {

                reader = new Guacamole.StringReader(input_stream);

                reader.ontext = function receiveText(text) {








From: Mike Jumper <mike.jum...@guac-dev.org>
Reply-To: "user@guacamole.apache.org" <user@guacamole.apache.org>
Date: Tuesday, February 20, 2018 at 9:33 PM
To: "user@guacamole.apache.org" <user@guacamole.apache.org>
Subject: EXT: Re: Working with pipes


On Tue, Feb 20, 2018 at 7:23 PM, Nick Couchman <vn...@apache.org> wrote:

Is it possible for the client to access the terminal output at either the 
javascript or java layer?



So, one thing to keep in mind, here, is that the terminal output from SSH and 
Telnet is transmitted from guacd to the Guacamole Client as an image, not as 
text.  I know it doesn't *seem* like it, particularly since the client allows 
you to select text and copy it to the clipboard (and vice-versa), but if you 
look at the actual data going back and forth, all of the screen output, include 
"text" from the terminal, is image data.  So, doing anything with it (parsing, 
etc.) at the JavaScript layer is probably impractical, if not impossible.


Waaaaaait! Guacamole does send images, yes, but there is also an OSC which 
temporarily redirects output to a pipe stream:




There is an example of this within guacctl:




- Mike



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