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package Protocol::SMTP::Client; |
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$Protocol::SMTP::Client::VERSION = '0.002'; |
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185392
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use strict; |
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19
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7
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228
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use warnings; |
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169
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5
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8035
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use utf8; |
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74
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36
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6897
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use curry; |
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1435
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7
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185
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8
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7390
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use Future; |
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105389
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7
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330
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7089
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use Future::Utils qw(try_repeat fmap_void); |
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15864
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7
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514
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10
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5665
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use Authen::SASL; |
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13814
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7
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48
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11
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7
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7
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7443
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use MIME::Base64 qw(encode_base64 decode_base64); |
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6232
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7
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553
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12
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6582
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use Encode; |
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81138
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16767
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=head1 NAME |
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Protocol::SMTP::Client - abstract client support for mail sending |
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=head1 VERSION |
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version 0.002 |
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=head1 DESCRIPTION |
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Provides a client implementation for interacting with SMTP servers. |
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26
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=cut |
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28
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=head1 METHODS |
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30
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=head2 new |
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32
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Instantiates an SMTP client instance. |
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34
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Takes no parameters. |
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36
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=cut |
37
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38
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sub new { |
39
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8
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8
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1
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1123
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my $class = shift; |
40
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8
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50
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my $self = bless {@_}, $class; |
41
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8
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65
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$self->{auth_methods} = []; |
42
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8
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23
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$self->{task_queue} = []; |
43
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8
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22
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$self->{multi} = []; |
44
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8
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28
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$self |
45
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} |
46
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47
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=head2 auth_mechanism_override |
48
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49
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Set this on instantiation to pick a specific auth method. |
50
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51
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=cut |
52
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53
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1
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1
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1
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6
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sub auth_mechanism_override { shift->{auth_mechanism_override} } |
54
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55
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=head2 login |
56
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57
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Attempts to log in to the server. Takes the following named parameters: |
58
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59
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=over 4 |
60
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61
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=item * user - the username we're logging in with, might be your email address |
62
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or a plain username |
63
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64
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=item * pass - used for password-based auth mechanisms such as PLAIN or MD5 |
65
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66
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=back |
67
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68
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Note that other auth mechanisms may provide additional fields - this will |
69
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mostly be determined by how L deals with the authentication |
70
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process. |
71
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72
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Returns a L which resolves once login completes or fails. |
73
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74
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=cut |
75
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76
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sub login { |
77
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2
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2
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1
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1444
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my $self = shift; |
78
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2
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100
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10
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return $self->new_future->fail('no auth?') unless my @auth = $self->auth_methods; |
79
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80
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1
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134
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my %args = @_; |
81
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1
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4
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my $auth_string = join ' ', @auth; |
82
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1
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6
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$self->debug_printf("Auth mechanisms [%s]", $auth_string); |
83
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1
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50
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5
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$auth_string = $self->auth_mechanism_override if $self->auth_mechanism_override; |
84
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1
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3
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my $f = $self->new_future; |
85
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$self->add_task(sub { |
86
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my $sasl = Authen::SASL->new( |
87
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mechanism => $auth_string, |
88
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callback => { |
89
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0
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0
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user => sub { $args{user} }, |
90
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0
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0
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authname => sub { $args{user} }, |
91
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0
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0
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pass => sub { $args{pass} }, |
92
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}, |
93
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1
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1
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31
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); |
94
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1
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237
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my $client = $sasl->client_new( |
95
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'smtp', |
96
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$args{host}, |
97
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0, |
98
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); |
99
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100
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1
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27106
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my $rslt = $client->client_start; |
101
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1
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50
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33
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48
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$rslt = (defined($rslt) && length($rslt)) ? encode_base64($rslt, '') : ''; |
102
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1
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24
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$self->write_line(join ' ', |
103
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'AUTH', |
104
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$client->mechanism, |
105
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$rslt |
106
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); |
107
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$self->{auth_handler} = sub { |
108
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0
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0
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my $code = shift; |
109
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0
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0
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0
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if($code =~ /^5/) { |
|
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0
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0
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110
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0
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0
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delete $self->{auth_handler}; |
111
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0
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0
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return $f->fail(shift); |
112
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} elsif($code =~ /^3/) { |
113
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0
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0
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my $data = decode_base64(shift); |
114
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0
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0
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$self->write_line( |
115
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encode_base64( |
116
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$client->client_step($data), |
117
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'' |
118
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) |
119
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); |
120
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} elsif($code =~ /2/) { |
121
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0
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0
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delete $self->{auth_handler}; |
122
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0
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0
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$f->done |
123
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} |
124
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1
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9
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}; |
125
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1
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13
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$f |
126
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1
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177
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}); |
127
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1
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29
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$f; |
128
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} |
129
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130
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131
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=head2 send |
132
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133
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Attempts to send the given email. |
134
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135
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Expects the following named parameters: |
136
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137
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=over 4 |
138
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139
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=item * to - single email address or arrayref of recipients |
140
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141
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=item * from - envelope sender |
142
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143
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=item * data - the email content itself, currently needs to be 8BITMIME |
144
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encoded, please raise an RT if other formats are required. |
145
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146
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=item * content - the email as a Perl Unicode string, this is mutually |
147
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exclusive with the data parameter |
148
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149
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=back |
150
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151
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Returns a L which will resolve when the send is complete. |
152
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153
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=cut |
154
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155
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sub send { |
156
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0
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0
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1
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0
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my $self = shift; |
157
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0
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|
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0
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my %args = @_; |
158
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0
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|
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0
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my $f = $self->new_future; |
159
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$self->add_task(sub { |
160
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0
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|
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0
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0
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$self->send_mail( |
161
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%args |
162
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)->on_ready($f); |
163
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0
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0
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}); |
164
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0
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0
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$f |
165
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} |
166
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167
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|
=head1 INTERNAL METHODS |
168
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169
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The following are used internally. They are not likely to be of much |
170
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use to client code, but may need to be called by implementations. |
171
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See L for a reference. |
172
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173
|
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=head2 new_future |
174
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175
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Instantiates a new L. Sometimes implementations may want |
176
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a L subclass which knows how to C. Defaults to L. |
177
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178
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=cut |
179
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180
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sub new_future { |
181
|
6
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6
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1
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52
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my $factory = shift->{future_factory}; |
182
|
6
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100
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41
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$factory ? $factory->() : Future->new; |
183
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} |
184
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185
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=head2 debug_printf |
186
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187
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Used internally for debugging, returns an empty list. |
188
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189
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=cut |
190
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191
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sub debug_printf { |
192
|
15
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50
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15
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1
|
52
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return unless $ENV{'PERL_SMTP_DEBUG'}; |
193
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0
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|
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0
|
my $self = shift; |
194
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0
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|
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0
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my $fmt = shift; |
195
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0
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0
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printf "$fmt\n", @_; |
196
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0
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0
|
return; |
197
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} |
198
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199
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=head2 write |
200
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201
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Uses the configured writer to send data to the remote. |
202
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203
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=cut |
204
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205
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sub write { |
206
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2
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2
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1
|
3
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my $self = shift; |
207
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2
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11
|
$self->{writer}->(@_); |
208
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} |
209
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210
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=head2 have_active_task |
211
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212
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Returns true if we're partway through processing something. |
213
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214
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=cut |
215
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216
|
5
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5
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1
|
864
|
sub have_active_task { exists shift->{active_task} } |
217
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218
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=head2 write_line |
219
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220
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Frames a line appropriately for sending to a remote. |
221
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222
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=cut |
223
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224
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sub write_line { |
225
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2
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2
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1
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13
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my $self = shift; |
226
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2
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5
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my $line = shift; |
227
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2
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50
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18
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my $f = defined(wantarray) ? $self->new_future : undef; |
228
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2
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10
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$self->debug_printf("Writing %s", $line); |
229
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$self->write($line . "\x0D\x0A", |
230
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defined(wantarray) |
231
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0
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0
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0
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? (on_flush => sub { $f->done }) |
232
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2
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50
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12
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: () |
233
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); |
234
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2
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89
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$f |
235
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} |
236
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237
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=head2 body_encoding |
238
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239
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Body encoding, currently hardcoded as 8BITMIME. |
240
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241
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=cut |
242
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243
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1
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1
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1
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13
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sub body_encoding { '8BITMIME' } |
244
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245
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=head2 send_mail |
246
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247
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Sequence of writes to send email to the remote. Normally you wouldn't use |
248
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this directly, it'd be queued as a task by L. |
249
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250
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=cut |
251
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252
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sub send_mail { |
253
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2
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2
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1
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1334
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my $self = shift; |
254
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2
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8
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my %args = @_; |
255
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2
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50
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10
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my @recipient = (ref($args{to}) eq 'ARRAY') ? @{$args{to}} : $args{to}; |
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0
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0
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256
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257
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2
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50
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38
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die "Must specify either data or content" unless 1 == grep exists $args{$_}, qw(data content); |
258
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259
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# We accept pre-encoded data or a Perl Unicode string. |
260
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0
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0
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0
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$args{data} = Encode::encode('UTF-8' => delete $args{content}) if exists $args{content}; |
261
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262
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# TODO Since our email content is not particularly heavy, and we're |
263
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# dealing with 8bitmime, this uses the naïve split-into-lines approach |
264
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# with the entire message in memory. Binary attachments, alternative |
265
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# encodings and larger messages are not well handled here. |
266
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# This is fixed by using Aliran, of course, but we don't have that option |
267
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# just yet. |
268
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0
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0
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my @mail = split /\x0D\x0A/, $args{data}; |
269
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270
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{ |
271
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0
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0
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my $mail_line = 'MAIL FROM:<' . $args{from} . '>'; |
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0
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0
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272
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0
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0
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0
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$mail_line .= ' BODY=' . $self->body_encoding if $self->body_encoding; |
273
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0
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0
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$self->write_line($mail_line); |
274
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} |
275
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$self->wait_for(250) |
276
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->then(sub { |
277
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fmap_void { |
278
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0
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0
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$self->write_line(q{RCPT TO:<} . shift . q{>}); |
279
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# Each recipient line should be acknowledged with 250 if valid. |
280
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0
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0
|
$self->wait_for(250) |
281
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0
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0
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0
|
} foreach => \@recipient |
282
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|
})->then(sub { |
283
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0
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0
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0
|
$self->write_line(q{DATA}); |
284
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0
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0
|
$self->wait_for(354) |
285
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|
})->then(sub { |
286
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0
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0
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0
|
$self->{sending_content} = 1; |
287
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|
(fmap_void { |
288
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0
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0
|
my $line = shift; |
289
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|
# RFC2821 section 4.5.2 |
290
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0
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0
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0
|
$line = ".$line" if substr($line, 0, 1) eq '.'; |
291
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0
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0
|
$self->write_line($line); |
292
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|
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|
} generate => sub { |
293
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0
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0
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0
|
return unless @mail; |
294
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|
shift @mail |
295
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0
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0
|
}) |
296
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0
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|
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0
|
})->then(sub { |
297
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0
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0
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|
0
|
$self->{sending_content} = 0; |
298
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0
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0
|
$self->write_line('.'); |
299
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0
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|
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0
|
$self->wait_for(250) |
300
|
0
|
|
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0
|
}); |
301
|
|
|
|
|
|
|
} |
302
|
|
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|
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|
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|
303
|
|
|
|
|
|
|
=head2 check_next_task |
304
|
|
|
|
|
|
|
|
305
|
|
|
|
|
|
|
Called internally to check whether we have any other tasks we could be doing. |
306
|
|
|
|
|
|
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|
307
|
|
|
|
|
|
|
=cut |
308
|
|
|
|
|
|
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|
309
|
|
|
|
|
|
|
sub check_next_task { |
310
|
5
|
|
|
5
|
1
|
7
|
my $self = shift; |
311
|
5
|
100
|
|
|
|
9
|
return 0 unless @{$self->{task_queue}}; |
|
5
|
|
|
|
|
28
|
|
312
|
|
|
|
|
|
|
|
313
|
2
|
|
|
|
|
3
|
my $next = shift(@{$self->{task_queue}}); |
|
2
|
|
|
|
|
5
|
|
314
|
2
|
|
|
|
|
167
|
$self->{active_task} = 1; |
315
|
2
|
|
|
|
|
6
|
my $f = $next->(); |
316
|
|
|
|
|
|
|
$f->on_ready(sub { |
317
|
1
|
|
|
1
|
|
15
|
delete $self->{active_task}; |
318
|
1
|
|
|
|
|
6
|
$self->check_next_task; |
319
|
1
|
|
|
|
|
3
|
undef $f |
320
|
2
|
|
|
|
|
59
|
}); |
321
|
2
|
|
|
|
|
23
|
return 1; |
322
|
|
|
|
|
|
|
} |
323
|
|
|
|
|
|
|
|
324
|
|
|
|
|
|
|
=head2 has_feature |
325
|
|
|
|
|
|
|
|
326
|
|
|
|
|
|
|
Returns true if we have the given feature. |
327
|
|
|
|
|
|
|
|
328
|
|
|
|
|
|
|
=cut |
329
|
|
|
|
|
|
|
|
330
|
0
|
|
|
0
|
1
|
0
|
sub has_feature { $_[0]->{features}{$_[1]} } |
331
|
|
|
|
|
|
|
|
332
|
|
|
|
|
|
|
=head2 remote_feature |
333
|
|
|
|
|
|
|
|
334
|
|
|
|
|
|
|
Marks the given feature from EHLO response as supported. |
335
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
Also applies AUTH values. |
337
|
|
|
|
|
|
|
|
338
|
|
|
|
|
|
|
=cut |
339
|
|
|
|
|
|
|
|
340
|
|
|
|
|
|
|
sub remote_feature { |
341
|
4
|
|
|
4
|
1
|
5
|
my $self = shift; |
342
|
4
|
|
|
|
|
7
|
my ($feature, $param) = @_; |
343
|
4
|
100
|
|
|
|
10
|
if($feature eq 'AUTH') { |
344
|
1
|
50
|
|
|
|
10
|
$self->{auth_methods} = [split ' ', $param] unless $self->{auth_method_override}; |
345
|
|
|
|
|
|
|
} else { |
346
|
3
|
|
100
|
|
|
22
|
$self->{features}{$feature} = $param // 1; |
347
|
|
|
|
|
|
|
} |
348
|
|
|
|
|
|
|
} |
349
|
|
|
|
|
|
|
|
350
|
|
|
|
|
|
|
=head2 auth_methods |
351
|
|
|
|
|
|
|
|
352
|
|
|
|
|
|
|
Internal accessor, returns the list of defined authentication methods. |
353
|
|
|
|
|
|
|
|
354
|
|
|
|
|
|
|
=cut |
355
|
|
|
|
|
|
|
|
356
|
2
|
|
|
2
|
1
|
4
|
sub auth_methods { @{shift->{auth_methods}} } |
|
2
|
|
|
|
|
17
|
|
357
|
|
|
|
|
|
|
|
358
|
|
|
|
|
|
|
=head2 send_greeting |
359
|
|
|
|
|
|
|
|
360
|
|
|
|
|
|
|
Sends the EHLO greeting and handles the resulting feature list. |
361
|
|
|
|
|
|
|
|
362
|
|
|
|
|
|
|
=cut |
363
|
|
|
|
|
|
|
|
364
|
|
|
|
|
|
|
sub send_greeting { |
365
|
1
|
|
|
1
|
1
|
451
|
my $self = shift; |
366
|
|
|
|
|
|
|
# Start with our greeting, which should receive back a nice list of features |
367
|
1
|
|
|
|
|
5
|
$self->write_line( |
368
|
|
|
|
|
|
|
q{EHLO localhost} |
369
|
|
|
|
|
|
|
); |
370
|
|
|
|
|
|
|
$self->wait_for(250)->on_done(sub { |
371
|
1
|
|
|
1
|
|
49
|
$self->{remote_domain} = shift; |
372
|
1
|
|
|
|
|
4
|
for (@_) { |
373
|
4
|
|
|
|
|
20
|
my ($feature, $param) = /^(\S+)(?: (.*))?$/; |
374
|
4
|
|
|
|
|
11
|
$self->remote_feature($feature => $param); |
375
|
|
|
|
|
|
|
} |
376
|
1
|
|
|
|
|
4
|
}); |
377
|
|
|
|
|
|
|
} |
378
|
|
|
|
|
|
|
|
379
|
|
|
|
|
|
|
=head2 starttls |
380
|
|
|
|
|
|
|
|
381
|
|
|
|
|
|
|
Switch to TLS mode. |
382
|
|
|
|
|
|
|
|
383
|
|
|
|
|
|
|
=cut |
384
|
|
|
|
|
|
|
|
385
|
|
|
|
|
|
|
sub starttls { |
386
|
0
|
|
|
0
|
1
|
0
|
my $self = shift; |
387
|
0
|
|
|
|
|
0
|
$self->write_line(q{STARTTLS}); |
388
|
0
|
|
|
|
|
0
|
$self->wait_for(220) |
389
|
|
|
|
|
|
|
} |
390
|
|
|
|
|
|
|
|
391
|
|
|
|
|
|
|
=head2 startup |
392
|
|
|
|
|
|
|
|
393
|
|
|
|
|
|
|
Get initial startup banner. |
394
|
|
|
|
|
|
|
|
395
|
|
|
|
|
|
|
=cut |
396
|
|
|
|
|
|
|
|
397
|
|
|
|
|
|
|
sub startup { |
398
|
1
|
|
|
1
|
1
|
66
|
my $self = shift; |
399
|
|
|
|
|
|
|
$self->wait_for(220)->on_done(sub { |
400
|
1
|
|
|
1
|
|
57
|
$self->{remote_banner} = shift; |
401
|
1
|
|
|
|
|
5
|
}); |
402
|
|
|
|
|
|
|
} |
403
|
|
|
|
|
|
|
|
404
|
|
|
|
|
|
|
=head2 wait_for |
405
|
|
|
|
|
|
|
|
406
|
|
|
|
|
|
|
Waits for the given status code. |
407
|
|
|
|
|
|
|
|
408
|
|
|
|
|
|
|
If we get something else, will mark as a failure. |
409
|
|
|
|
|
|
|
|
410
|
|
|
|
|
|
|
=cut |
411
|
|
|
|
|
|
|
|
412
|
|
|
|
|
|
|
sub wait_for { |
413
|
2
|
|
|
2
|
1
|
3
|
my $self = shift; |
414
|
2
|
|
|
|
|
2
|
my $code = shift; |
415
|
2
|
|
|
|
|
6
|
my $f = $self->new_future; |
416
|
2
|
|
|
|
|
33
|
push @{$self->{pending}}, [ $code => $f ]; |
|
2
|
|
|
|
|
14
|
|
417
|
2
|
|
|
|
|
19
|
$f |
418
|
|
|
|
|
|
|
} |
419
|
|
|
|
|
|
|
|
420
|
|
|
|
|
|
|
=head2 handle_line |
421
|
|
|
|
|
|
|
|
422
|
|
|
|
|
|
|
Handle input line from remote. |
423
|
|
|
|
|
|
|
|
424
|
|
|
|
|
|
|
=cut |
425
|
|
|
|
|
|
|
|
426
|
|
|
|
|
|
|
sub handle_line { |
427
|
6
|
|
|
6
|
1
|
5801
|
my $self = shift; |
428
|
6
|
|
|
|
|
9
|
my $line = shift; |
429
|
6
|
|
|
|
|
15
|
$self->debug_printf("Received line: %s", $line); |
430
|
|
|
|
|
|
|
|
431
|
6
|
|
|
|
|
33
|
my ($code, $multi, $remainder) = $line =~ /^(\d{3})([- ])(.*)$/; |
432
|
6
|
50
|
|
|
|
16
|
if($self->{auth_handler}) { |
433
|
0
|
|
|
|
|
0
|
return $self->{auth_handler}->($code, $remainder); |
434
|
|
|
|
|
|
|
} |
435
|
|
|
|
|
|
|
|
436
|
6
|
|
|
|
|
6
|
push @{$self->{multi}}, $remainder; |
|
6
|
|
|
|
|
13
|
|
437
|
|
|
|
|
|
|
|
438
|
6
|
100
|
|
|
|
22
|
if($multi eq ' ') { |
439
|
2
|
|
|
|
|
3
|
my $task = shift @{$self->{pending}}; |
|
2
|
|
|
|
|
5
|
|
440
|
2
|
50
|
|
|
|
8
|
if($task->[0] == $code) { |
441
|
2
|
|
|
|
|
3
|
$self->debug_printf("Applying line [$_] for multi-line task") for @{$self->{multi}}; |
|
2
|
|
|
|
|
30
|
|
442
|
2
|
|
|
|
|
4
|
$task->[1]->done(@{$self->{multi}}); |
|
2
|
|
|
|
|
14
|
|
443
|
|
|
|
|
|
|
} else { |
444
|
0
|
|
|
|
|
0
|
$self->debug_printf("We had an unexpected code - $code instead of " . $task->[0]); |
445
|
0
|
|
|
|
|
0
|
$task->[1]->fail($code => $remainder, 'expected ' . $task->[0]); |
446
|
|
|
|
|
|
|
} |
447
|
2
|
|
|
|
|
19
|
$self->{multi} = []; |
448
|
2
|
50
|
|
|
|
3
|
$self->check_next_task unless @{$self->{pending}}; |
|
2
|
|
|
|
|
13
|
|
449
|
|
|
|
|
|
|
} |
450
|
|
|
|
|
|
|
} |
451
|
|
|
|
|
|
|
|
452
|
|
|
|
|
|
|
=head2 add_task |
453
|
|
|
|
|
|
|
|
454
|
|
|
|
|
|
|
Add another task to the queue. |
455
|
|
|
|
|
|
|
|
456
|
|
|
|
|
|
|
=cut |
457
|
|
|
|
|
|
|
|
458
|
|
|
|
|
|
|
sub add_task { |
459
|
2
|
|
|
2
|
1
|
5
|
my $self = shift; |
460
|
2
|
|
|
|
|
5
|
my $task = shift; |
461
|
2
|
|
|
|
|
4
|
push @{$self->{task_queue}}, $task; |
|
2
|
|
|
|
|
8
|
|
462
|
2
|
50
|
|
|
|
8
|
$self->check_next_task unless $self->have_active_task; |
463
|
|
|
|
|
|
|
} |
464
|
|
|
|
|
|
|
|
465
|
|
|
|
|
|
|
1; |
466
|
|
|
|
|
|
|
|
467
|
|
|
|
|
|
|
=head1 AUTHOR |
468
|
|
|
|
|
|
|
|
469
|
|
|
|
|
|
|
Tom Molesworth |
470
|
|
|
|
|
|
|
|
471
|
|
|
|
|
|
|
=head1 LICENSE |
472
|
|
|
|
|
|
|
|
473
|
|
|
|
|
|
|
Copyright Tom Molesworth 2012-2014. Licensed under the same terms as Perl itself. |