summaryrefslogtreecommitdiff
path: root/lib/net/smtp.rb
blob: dd74cdcdb4714fdead6ddd28238e9c1172dc8193 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
=begin

= net/smtp.rb

written by Minero Aoki <aamine@dp.u-netsurf.ne.jp>

This library is distributed under the terms of Ruby license.
You can freely distribute/modify this file.

=end


require 'net/session'


module Net


=begin

== Net::SMTPSession

=== Super Class

Net::Session

=== Class Methods

: new( address = 'localhost', port = 25 )

  This method create new SMTPSession object.


=== Methods

: start( helo_domain = ENV['HOSTNAME'] )

  This method opens TCP connection and start SMTP session.
  If session had been started, do nothing and return false.

: sendmail( mailsrc, from_domain, to_addrs )

  This method sends 'mailsrc' as mail. SMTPSession read strings from 'mailsrc'
  by calling 'each' iterator, and convert them into "\r\n" terminated string when write.

  SMTPSession's Exceptions are:
  * Protocol::ProtoSyntaxError: syntax error (errno.500)
  * Protocol::ProtoFatalError: fatal error (errno.550)
  * Protocol::ProtoUnknownError: unknown error
  * Protocol::ProtoServerBusy: temporary error (errno.420/450)

: finish

  This method closes SMTP session.
  If session had not started, do nothind and return false.

=end

  class SMTPSession < Session

    Version = '1.1.0'

    session_setvar :port,         '25'
    session_setvar :command_type, 'SMTPCommand'


    def sendmail( mailsrc, fromaddr, toaddrs )
      @proto.mailfrom fromaddr
      @proto.rcpt toaddrs
      @proto.data
      @proto.sendmail mailsrc
    end


    private


    def do_start( helodom = ENV['HOSTNAME'] )
      unless helodom then
        raise ArgumentError, "cannot get hostname"
      end
      @proto.helo helodom
    end

  end

  SMTP = SMTPSession


=begin

== Net::SMTPCommand

=== Super Class

Net::Command

=== Class Methods

: new( socket )

  This method creates new SMTPCommand object, and open SMTP session.


=== Methods

: helo( helo_domain )

  This method send "HELO" command and start SMTP session.
  helo_domain is localhost's FQDN.

: mailfrom( from_addr )

  This method sends "MAIL FROM" command.
  from_addr is your mail address(????@????).

: rcpt( to_addrs )

  This method sends "RCPT TO" command.
  to_addrs is array of mail address(???@???) of destination.

: data( mailsrc )

  This method send 'mailsrc' as mail. SMTP reads strings from 'mailsrc'
  by calling 'each' iterator. 

: quit

  This method sends "QUIT" command and ends SMTP session.

=end

  class SMTPCommand < Command

    def initialize( sock )
      super
      check_reply SuccessCode
    end


    def helo( fromdom )
      @socket.writeline( 'HELO ' << fromdom )
      check_reply( SuccessCode )
    end


    def mailfrom( fromaddr )
      @socket.writeline( 'MAIL FROM:<' + fromaddr + '>' )
      check_reply( SuccessCode )
    end


    def rcpt( toaddrs )
      toaddrs.each do |i|
        @socket.writeline( 'RCPT TO:<' + i + '>' )
        check_reply( SuccessCode )
      end
    end


    def data
      @socket.writeline( 'DATA' )
      check_reply( ContinueCode )
    end


    def writemail( mailsrc )
      @socket.write_pendstr( mailsrc )
      check_reply( SuccessCode )
    end
    alias sendmail writemail


    private


    def do_quit
      @socket.writeline( 'QUIT' )
      check_reply( SuccessCode )
    end


    def get_reply
      arr = read_reply
      stat = arr[0][0,3]

      cls = UnknownCode
      case stat[0]
      when ?2 then cls = SuccessCode
      when ?3 then cls = ContinueCode
      when ?4 then cls = ServerBusyCode
      when ?5 then
        case stat[1]
        when ?0 then cls = SyntaxErrorCode
        when ?5 then cls = FatalErrorCode
        end
      end

      return cls.new( stat, arr.join('') )
    end


    def read_reply
      arr = []

      while (str = @socket.readline)[3] == ?- do   # ex: "210-..."
        arr.push str
      end
      arr.push str

      return arr
    end

  end

end