How to ask for a user input from a remote server with SSHKit? - input

Question

I need to ask a user input from a ruby script on a remote server. I managed to perform it with bash with the following code
class ConfirmHandler
def on_data(command, stream_name, data, channel)
puts "data received: #{data}"
if data.to_s =~ /\?$/
prompt = Net::SSH::Prompt.default.start(type: 'confirm')
response = prompt.ask "Please enter your response (y/n)"
channel.send_data "#{response}\n"
end
end
end
require 'sshkit'
require 'sshkit/dsl'
include SSHKit::DSL
on '<ssh-server-name>' do |host|
cmd = <<-CMD
echo 'Do something?';
read response;
echo response=$response
CMD
capture(cmd.squish , interaction_handler: ConfirmHandler.new)
end
When I run this script on my local machine I see
data received: Do something?
Please enter your response (y/n)
data received: response=y
I try to wrap the bash CMD code into a ruby script:
on '<ssh-server-name>' do |host|
cmd = <<-CMD
ruby -e "
puts 'Do something?';
require 'open3';
response = Open3.capture3('read response; echo $response');
puts 'response=' + response.to_s;
"
CMD
capture(cmd.squish , interaction_handler: ConfirmHandler.new)
end
and get the following result:
data received: Do something?
Please enter your response (y/n)
data received: response=["\n", "", #<Process::Status: pid 9081 exit 0>]
I was writing the code above looking at the Interactive commands section on the SSHKit Github home page
How can I capture the user response from a ruby script with SSKKit on the remote server?

Answer 1

I was able to capture the user response from a ruby script on a remote server with the following code:
# ask_response.rb
puts 'Do something?';
response = `read response; echo $response`;
puts 'response=' + response.to_s;
ask_response.rb is a ruby script which is located on a remote server. And locally I run:
on '<ssh-server-name>' do |host|
capture("ruby ask_response.rb" , interaction_handler: ConfirmHandler.new)
end