Using apple script to press the return key when prompted to connect to server - networking

Question

Currently this is my delima. Once in a while a build agent will reboot. It needs to always stay connected to share on one of our servers. The idea was to tell finder to mount the volume, wait 2 seconds, and then press enter...since the user name and pssword are both part of the address when I enter it such as SMB://username:password#Server1/DFS it pops up the pasword dialog fully populated but I can't get applescript to recognize it, then press either connect or the return to say "Yes" login witht hat name and don't prompt me.
it worked fine when connecting at home to a synology device but it's not working when connecting to a server in the office.
tell application "Finder" to mount volume "SMB://username:password#Server1/DFS"
delay 2
tell application "System Events" to keystroke "return" -- key code 36
Any help for this seemingly simple step would be greatly apprecited.
I have looked ove the forums and found variou stratagies but they all relate to an application like Firefox or some other script aware app. I just need it to press enter when the password dialog comes up.

Answer 1

First of all the Finder is not needed to mount a volume, you can delete the tell block.
Secondly, if username and password are passed the volume is supposed to mount without a dialog. Maybe you could find the reason why it doesn't.
Nevertheless the password dialog belongs to the process SecurityAgent, you have to use (ugly) GUI scripting to press the button:
tell application "System Events"
repeat until exists process "SecurityAgent"
delay 0.5
end repeat
tell window 1 of process "SecurityAgent"
click button 2
end tell
end tell
The script waits until the window appeared, this is much more reliable than an hard-coded delay.

Answer 2

Looks like a possible XY Problem as I would expect a solution such as https://apple.stackexchange.com/a/698/204318 to work for you to directly mount the share:
mount -t smbfs //username:password#MACHINENAME/SHARENAME /SomeLocalFolderOfChoice
However, if you are really required to interact with the dialog, and as you asked about it, take a look at this tutorial (written in Python) for scripting up something:
detect missing connection
attempt connection
capture screen periodically
look for dialog box, else loop
error after a few seconds of failure
if dialog is detected, interact with it
input username and password
wait, then press return
check if connection worked after a small delay
success or failure
This type of strategy is very powerful for interacting with all sorts of different dialogs you may encounter and should be possible in AppleScript if you are much more familiar with it (or another scripting language).

Answer 3

If you are open to non-AppleScript solutions, then you might consider Keyboard Maestro, one of the best Mac automation tools available.
You said:
it pops up the pasword dialog fully populated but I can't get
applescript to recognize it, then press either connect or the return
to say "Yes" login witht hat name and don't prompt me.
You could probably do this very easily using Keyboard Maestro. Here's an example of the KM Actions to accomplish this.
If you'd like help with KM, please visit the forum at:
https://forum.keyboardmaestro.com/
I'm a big AppleScript/JXA user, but I often find it easier/quicker to use KM for many automation tasks. Of course, KM Macros can execute AppleScript, JXA, Shell Scripts, and other scripts easily.
You can try a full version of KM for free for 30 days.