Net::SSH & passing session

ruby-talk
1

Hello,

I can make a connection using the examples provided in the
documentation.

But if I try to make it more 'clean', as shown bellow, I get the
session returned, but I can't seem to do anything with it.

Can you help me with this ?

Thanks !

This is the code:

require 'net/ssh'

class MySSH
  def initialize(host, port, user, password)
    @host = host
    @port = port
    @user = user
    @password = password
  end

  def myConnection
    begin
      session = Net::SSH::Session.new(@host, @port, @user, @password )
    rescue SocketError
      raise(IOError, 'Could not connect to host')
    rescue Net::SSH::AuthenticationFailed
      raise(IOError, 'Authentication Failed')
    end
    return session
  end
end # of class

a = MySSH.new( "localhost", 22, "aaa", "bbb" )
puts "from inspect #{a.inspect}"

# here you see that session is being returned
puts "the value of a.myConnection is: #{a.myConnection}"

# just to double check
if a.myConnection.open?
  puts "yep, connection is OPEN"
end

# Now this stuff below don't get 'seen' at all
# and that is the real problem
# How do I use the session once I pass it ?
# -----------------------------------------
a.myConnection.open_channel do |channel|
  puts "open now, closing"
  channel.close
end
a.myConnection.loop

2

The problem is that your #myConnection method isn't caching the session, so every time you call it, you're opening a new session. This means that the channel you try to open gets discarded, and the loop applies to a completely different connection. Try this:

   def myConnection
     begin
       @session ||= Net::SSH::Session.new(@host, @port, @user, @password )
     rescue SocketError
       raise(IOError, 'Could not connect to host')
     rescue Net::SSH::AuthenticationFailed
       raise(IOError, 'Authentication Failed')
     end
   end

- Jamis

···

On Sep 30, 2005, at 11:36 AM, kilim wrote:

Hello,

I can make a connection using the examples provided in the
documentation.

But if I try to make it more 'clean', as shown bellow, I get the
session returned, but I can't seem to do anything with it.

Can you help me with this ?

Thanks !

This is the code:

require 'net/ssh'

class MySSH
  def initialize(host, port, user, password)
    @host = host
    @port = port
    @user = user
    @password = password
  end

  def myConnection
    begin
      session = Net::SSH::Session.new(@host, @port, @user, @password )
    rescue SocketError
      raise(IOError, 'Could not connect to host')
    rescue Net::SSH::AuthenticationFailed
      raise(IOError, 'Authentication Failed')
    end
    return session
  end
end # of class

a = MySSH.new( "localhost", 22, "aaa", "bbb" )
puts "from inspect #{a.inspect}"

# here you see that session is being returned
puts "the value of a.myConnection is: #{a.myConnection}"

# just to double check
if a.myConnection.open?
  puts "yep, connection is OPEN"
end

# Now this stuff below don't get 'seen' at all
# and that is the real problem
# How do I use the session once I pass it ?
# -----------------------------------------
a.myConnection.open_channel do |channel|
  puts "open now, closing"
  channel.close
end
a.myConnection.loop