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|
=begin
= net/smtp.rb
Copyright (c) 1999-2002 Yukihiro Matsumoto
written & maintained by Minero Aoki <aamine@loveruby.net>
This program is free software. You can re-distribute and/or
modify this program under the same terms as Ruby itself,
Ruby Distribute License or GNU General Public License.
NOTE: You can find Japanese version of this document in
the doc/net directory of the standard ruby interpreter package.
$Id$
== What is This Module?
This module provides your program the functions to send internet
mail via SMTP, Simple Mail Transfer Protocol. For details of
SMTP itself, refer [RFC2821] ((<URL:http://www.ietf.org/rfc/rfc2821.txt>)).
== What is NOT This Module?
This module does NOT provide functions to compose internet mails.
You must create it by yourself. If you want better mail support,
try RubyMail or TMail. You can get both libraries from RAA.
((<URL:http://www.ruby-lang.org/en/raa.html>))
FYI: official documentation of internet mail is:
[RFC2822] ((<URL:http://www.ietf.org/rfc/rfc2822.txt>)).
== Examples
=== Sending Mail
You must open connection to SMTP server before sending mails.
First argument is the address of SMTP server, and second argument
is port number. Using SMTP.start with block is the most simple way
to do it. SMTP connection is closed automatically after block is
executed.
require 'net/smtp'
Net::SMTP.start('your.smtp.server', 25) {|smtp|
# use smtp object only in this block
}
Replace 'your.smtp.server' by your SMTP server. Normally
your system manager or internet provider is supplying a server
for you.
Then you can send mail.
mail_text = <<END_OF_MAIL
From: Your Name <your@mail.address>
To: Dest Address <to@some.domain>
Subject: test mail
Date: Sat, 23 Jun 2001 16:26:43 +0900
Message-Id: <unique.message.id.string@some.domain>
This is test mail.
END_OF_MAIL
require 'net/smtp'
Net::SMTP.start('your.smtp.server', 25) {|smtp|
smtp.send_mail mail_text,
'your@mail.address',
'his_addess@example.com'
}
=== Closing Session
You MUST close SMTP session after sending mails, by calling #finish
method. You can also use block form of SMTP.start/SMTP#start, which
closes session automatically. I strongly recommend later one. It is
more beautiful and simple.
# using SMTP#finish
smtp = Net::SMTP.start('your.smtp.server', 25)
smtp.send_mail mail_string, 'from@address', 'to@address'
smtp.finish
# using block form of SMTP.start
Net::SMTP.start('your.smtp.server', 25) {|smtp|
smtp.send_mail mail_string, 'from@address', 'to@address'
}
=== Sending Mails From non-String Sources
In an example above I has sent mail from String (here document literal).
SMTP#send_mail accepts any objects which has "each" method
like File and Array.
require 'net/smtp'
Net::SMTP.start('your.smtp.server', 25) {|smtp|
File.open('Mail/draft/1') {|f|
smtp.send_mail f, 'your@mail.address', 'to@some.domain'
}
}
=== HELO domain
In almost all situation, you must designate the third argument
of SMTP.start/SMTP#start. It is the domain name which you are on
(the host to send mail from). It is called "HELO domain".
SMTP server will judge if he/she should send or reject
the SMTP session by inspecting HELO domain.
Net::SMTP.start( 'your.smtp.server', 25,
'mail.from.domain' ) {|smtp|
== class Net::SMTP
=== Class Methods
: new( address, port = 25 )
creates a new Net::SMTP object.
: start( address, port = 25, helo_domain = 'localhost.localdomain', account = nil, password = nil, authtype = nil )
: start( address, port = 25, helo_domain = 'localhost.localdomain', account = nil, password = nil, authtype = nil ) {|smtp| .... }
is equal to
Net::SMTP.new(address,port).start(helo_domain,account,password,authtype)
# example
Net::SMTP.start( 'your.smtp.server' ) {
smtp.send_mail mail_string, 'from@mail.address', 'dest@mail.address'
}
=== Instance Methods
: start( helo_domain = <local host name>, account = nil, password = nil, authtype = nil )
: start( helo_domain = <local host name>, account = nil, password = nil, authtype = nil ) {|smtp| .... }
opens TCP connection and starts SMTP session.
HELO_DOMAIN is a domain that you'll dispatch mails from.
If protocol had been started, raises IOError.
When this methods is called with block, give a SMTP object to block and
close session after block call finished.
If both of account and password are given, is trying to get
authentication by using AUTH command. :plain or :cram_md5 is
allowed for AUTHTYPE.
: active?
true if SMTP session is started.
: address
the address to connect
: port
the port number to connect
: open_timeout
: open_timeout=(n)
seconds to wait until connection is opened.
If SMTP object cannot open a conection in this seconds,
it raises TimeoutError exception.
: read_timeout
: read_timeout=(n)
seconds to wait until reading one block (by one read(1) call).
If SMTP object cannot open a conection in this seconds,
it raises TimeoutError exception.
: finish
finishes SMTP session.
If SMTP session had not started, raises an IOError.
: send_mail( mailsrc, from_addr, *to_addrs )
This method sends MAILSRC as mail. A SMTP object read strings
from MAILSRC by calling "each" iterator, with converting them
into CRLF ("\r\n") terminated string when write.
FROM_ADDR must be a String, representing source mail address.
TO_ADDRS must be Strings or an Array of Strings, representing
destination mail addresses.
# example
Net::SMTP.start( 'your.smtp.server' ) {|smtp|
smtp.send_mail mail_string,
'from@mail.address',
'dest@mail.address' 'dest2@mail.address'
}
: ready( from_addr, *to_addrs ) {|adapter| .... }
This method stands by the SMTP object for sending mail and
gives adapter object to the block. ADAPTER has these 5 methods:
puts print printf write <<
FROM_ADDR must be a String, representing source mail address.
TO_ADDRS must be Strings or an Array of Strings, representing
destination mail addresses.
# example
Net::SMTP.start( 'your.smtp.server', 25 ) {|smtp|
smtp.ready( 'from@mail.addr', 'dest@mail.addr' ) {|f|
f.puts 'From: aamine@loveruby.net'
f.puts 'To: someone@somedomain.org'
f.puts 'Subject: test mail'
f.puts
f.puts 'This is test mail.'
}
}
== Exceptions
SMTP objects raise these exceptions:
: Net::ProtoSyntaxError
syntax error (errno.500)
: Net::ProtoFatalError
fatal error (errno.550)
: Net::ProtoUnknownError
unknown error. (is probably bug)
: Net::ProtoServerBusy
temporary error (errno.420/450)
=end
require 'net/protocol'
require 'digest/md5'
module Net
class SMTP < Protocol
protocol_param :default_port, '25'
protocol_param :command_type, '::Net::SMTPCommand'
protocol_param :socket_type, '::Net::InternetMessageIO'
def initialize( addr, port = nil )
super
@esmtp = true
end
def esmtp?
@esmtp
end
def esmtp=( bool )
@esmtp = bool
end
alias esmtp esmtp?
private
def do_start( helo = 'localhost.localdomain',
user = nil, secret = nil, authtype = nil )
conn_socket
conn_command
begin
if @esmtp
command().ehlo helo
else
command().helo helo
end
rescue ProtocolError
if @esmtp
@esmtp = false
command().error_ok
retry
else
raise
end
end
if user or secret
raise ArgumentError, 'both of account and password are required'\
unless user and secret
mid = 'auth_' + (authtype || 'cram_md5').to_s
raise ArgumentError, "wrong auth type #{authtype}"\
unless command().respond_to?(mid)
command().__send__ mid, user, secret
end
end
def do_finish
disconn_command
disconn_socket
end
#
# SMTP operations
#
public
def send_mail( mailsrc, from_addr, *to_addrs )
do_ready from_addr, to_addrs.flatten
command().write_mail mailsrc
end
alias sendmail send_mail
def ready( from_addr, *to_addrs, &block )
do_ready from_addr, to_addrs.flatten
command().through_mail(&block)
end
private
def do_ready( from_addr, to_addrs )
raise ArgumentError, 'mail destination does not given' if to_addrs.empty?
command().mailfrom from_addr
command().rcpt to_addrs
end
end
SMTPSession = SMTP
class SMTPCommand < Command
def initialize( sock )
super
atomic {
check_reply SuccessCode
}
end
def helo( domain )
atomic {
getok sprintf('HELO %s', domain)
}
end
def ehlo( domain )
atomic {
getok sprintf('EHLO %s', domain)
}
end
# "PLAIN" authentication [RFC2554]
def auth_plain( user, secret )
atomic {
getok sprintf('AUTH PLAIN %s',
["\0#{user}\0#{secret}"].pack('m').chomp)
}
end
# "CRAM-MD5" authentication [RFC2195]
def auth_cram_md5( user, secret )
atomic {
rep = getok('AUTH CRAM-MD5', ContinueCode)
challenge = rep.msg.split(/ /)[1].unpack('m')[0]
secret = Digest::MD5.digest(secret) if secret.size > 64
isecret = secret + "\0" * (64 - secret.size)
osecret = isecret.dup
0.upto(63) do |i|
isecret[i] ^= 0x36
osecret[i] ^= 0x5c
end
tmp = Digest::MD5.digest(isecret + challenge)
tmp = Digest::MD5.hexdigest(osecret + tmp)
getok [user + ' ' + tmp].pack('m').chomp
}
end
def mailfrom( fromaddr )
atomic {
getok sprintf('MAIL FROM:<%s>', fromaddr)
}
end
def rcpt( toaddrs )
toaddrs.each do |i|
atomic {
getok sprintf('RCPT TO:<%s>', i)
}
end
end
def write_mail( src )
atomic {
getok 'DATA', ContinueCode
@socket.write_message src
check_reply SuccessCode
}
end
def through_mail( &block )
atomic {
getok 'DATA', ContinueCode
@socket.through_message(&block)
check_reply SuccessCode
}
end
def quit
atomic {
getok 'QUIT'
}
end
private
def get_reply
arr = read_reply
stat = arr[0][0,3]
klass = case stat[0]
when ?2 then SuccessCode
when ?3 then ContinueCode
when ?4 then ServerErrorCode
when ?5 then
case stat[1]
when ?0 then SyntaxErrorCode
when ?3 then AuthErrorCode
when ?5 then FatalErrorCode
end
end
klass ||= UnknownCode
Response.new(klass, stat, arr.join(''))
end
def read_reply
arr = []
while true
str = @socket.readline
break unless str[3] == ?- # "210-PIPELINING"
arr.push str
end
arr.push str
arr
end
end
# for backward compatibility
module NetPrivate
SMTPCommand = ::Net::SMTPCommand
end
end # module Net
|