Sending emails with Ruby using Gmail

I was looking for this some time ago, so posting here in case someone else finds it useful also.
I use it normally as an alert sender for automation's scripts.


Works naturally with regular ruby(1.8), but apparently also works with JRuby.

Depends on openssl gem. See at the end of code for command line commands to install it.

Code:

	# originally: smtp_tls.rb grabed somewhere from net
	# added simple GMailer class to make it easier to send mails
	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
	class GMailer
	def self.send_mail(username='username', password='password', to='someone@gmail.com',
	subject='subject', body='<H1>Title</H1><p>Regards, John</p>')
	msgstr = <<END_OF_MESSAGE
	From: Your Name <#{username}@gmail.com>
	To: Destination Address <#{username}@gmail.com>
	MIME-Version: 1.0
	Content-type: text/html
	Subject: #{subject}
	Date: #{Time.now}
	#{body}
	END_OF_MESSAGE
	Net::SMTP.start('smtp.gmail.com', 587,'someone@gmail.com',username, password, 'plain' ) do |smtp|
	smtp.send_message(msgstr, "#{username}@gmail.com", to)
	end
	end
	end
	#requires openssl
	# ruby: sudo gem install openssl
	# jruby: jgem install jruby-openssl
	# Example
	# GMailer.send_mail('username', 'password', 'someone@gmail.com','subject123', '<H1>Title</H1><p>Regards, John</p>')

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