Tuesday, September 29, 2009

Send E-mail through GMail using Ruby

I stole this TLS code from Hatena::Diary:

require "openssl"
require "net/smtp"

Net::SMTP.class_eval do
private
def do_start(helodomain, user, secret, authtype)
raise IOError, 'SMTP session already started' if @started
check_auth_args user, secret, authtype if user or secret

sock = timeout(@open_timeout) { TCPSocket.open(@address, @port) }
@socket = Net::InternetMessageIO.new(sock)
@socket.read_timeout = 60 #@read_timeout
@socket.debug_output = STDERR #@debug_output

check_response(critical { recv_response() })
do_helo(helodomain)

raise 'openssl library not installed' unless defined?(OpenSSL)
starttls
ssl = OpenSSL::SSL::SSLSocket.new(sock)
ssl.sync_close = true
ssl.connect
@socket = Net::InternetMessageIO.new(ssl)
@socket.read_timeout = 60 #@read_timeout
@socket.debug_output = STDERR #@debug_output
do_helo(helodomain)

authenticate user, secret, authtype if user
@started = true
ensure
unless @started
# authentication failed, cancel connection.
@socket.close if not @started and @socket and not @socket.closed?
@socket = nil
end
end

def do_helo(helodomain)
begin
if @esmtp
ehlo helodomain
else
helo helodomain
end
rescue Net::ProtocolError
if @esmtp
@esmtp = false
@error_occured = false
retry
end
raise
end
end

def starttls
getok('STARTTLS')
end
end


Then I just used this script to send my message:


require 'net/smtp'
require 'smtp_tls'

user='user@gmail.com'
pass='secret'
helo='localhost.localdomain'

msg = "This is a test."

smtp = Net::SMTP.start('smtp.gmail.com', 587, helo, user, pass, 'plain')
smtp.send_message(msg, user, 'friend@example.com')
smtp.finish