From: Russell Fulton <r.fulton@...>
Date: 2006-01-19T08:21:54+09:00
Subject: problems with rescue clause.

Hi Folks,
         I'm writing a script to check passwords against email accounts, 
so I have written a method:

def tryIMAP (host, usessl, user, pass)

    proto = usessl ? "IMAPS" : "IMAP"
   begin
      imap = Net::IMAP.new(host, usessl ? 993 : 143, usessl)
   rescue SystemCallError
     raise "#{proto} failed"
   rescue SocketError
     raise "#{proto} failed"
   end
  begin
    imap.login( user, pass)
    imap.logout
    'success'
  rescue Net::IMAP::NoResponseError
    'failure'
  end

end


I use the method like this...

             while proto do
	      begin
	        case proto
	        when 'IMAPS'
	          status = tryIMAP(server, true, user, iD )

		  proto = nil
		when 'IMAP'
	          status = tryIMAP(server, false, user, iD )
		  proto = nil
	        when 'POP'
	          status = tryPOP(server, user, iD )
	          proto = nil
	        else
	          proto = nil
	        end
		rescue 'IMAPS failed'
		  proto = 'IMAP'
		rescue 'IMAP failed'
		  proto = 'POP'
		rescue 'POP failed'
		  servers[host][0] = 'NO'
		  proto = nil
		  STDERR.print "failed to connect to #{server}\n"
		end
	    end # while proto
	    print "logged in for #{target}\n" if status == 'success'

If I try a server which does not support IMAPS I get:
 class or module required for rescue clause (TypeError)

I'm at a loss to figure out what is wrong.  I've googled on the error 
message but have not found anything useful.

BTW I'm new to ruby and I'd welcome criticism of the above code.  If 
there are better ways of doing this I'd love to know.

Cheers, Russell

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