1 # This library is free software; you can redistribute it and/or modify
2 # it under the same terms as Perl itself.
4 # The license for this file differs from the rest of public-inbox.
6 # It monkey patches the "parts_multipart" subroutine with patches
7 # from Matthew Horsfall <wolfsage@gmail.com> at:
9 # git clone --mirror https://github.com/rjbs/Email-MIME.git refs/pull/28/head
11 # commit fe0eb870ab732507aa39a1070a2fd9435c7e4877
12 # ("Make sure we don't modify the body of a message when injecting a header.")
13 # commit 981d8201a7239b02114489529fd366c4c576a146
14 # ("GH #14 - Handle CRLF emails properly.")
15 # commit 2338d93598b5e8432df24bda8dfdc231bdeb666e
16 # ("GH #14 - Support multipart messages without content-type in subparts.")
18 # For Email::MIME >= 1.923 && < 1.935,
19 # commit dcef9be66c49ae89c7a5027a789bbbac544499ce
20 # ("removing all trailing newlines was too much")
22 package PublicInbox::MIME;
25 use base qw(Email::MIME);
26 use Email::MIME::ContentType;
27 $Email::MIME::ContentType::STRICT_PARAMS = 0;
29 if ($Email::MIME::VERSION <= 1.937) {
32 my $boundary = $self->{ct}->{attributes}->{boundary};
34 # Take a message, join all its lines together. Now try to Email::MIME->new
35 # it with 1.861 or earlier. Death! It tries to recurse endlessly on the
36 # body, because every time it splits on boundary it gets itself. Obviously
37 # that means it's a bogus message, but a mangled result (or exception) is
38 # better than endless recursion. -- rjbs, 2008-01-07
39 return $self->parts_single_part
40 unless $boundary and $self->body_raw =~ /^--\Q$boundary\E\s*$/sm;
42 $self->{body_raw} = Email::Simple::body($self);
45 my ($body, $epilogue) = split /^--\Q$boundary\E--\s*$/sm, $self->body_raw, 2;
47 # Split on boundaries, but keep blank lines after them intact
48 my @bits = split /^--\Q$boundary\E\s*?(?=$self->{mycrlf})/m, ($body || '');
50 Email::Simple::body_set($self, undef);
52 # If there are no headers in the potential MIME part, it's just part of the
53 # body. This is a horrible hack, although it's debatable whether it was
54 # better or worse when it was $self->{body} = shift @bits ... -- rjbs,
56 Email::Simple::body_set($self, shift @bits) if ($bits[0] || '') !~ /.*:.*/;
62 # Parts don't need headers. If they don't have them, they look like this:
64 # --90e6ba6e8d06f1723604fc1b809a
70 # $bit will contain two new lines before Part 2.
72 # Anything with headers will only have one new line.
74 # RFC 1341 Section 7.2 says parts without headers are to be considered
75 # plain US-ASCII text. -- alh
79 if ($bit =~ /^(?:$self->{mycrlf}){2}/) {
80 $bit = "Content-type: text/plain; charset=us-ascii" . $bit;
85 $bit =~ s/\A[\n\r]+//smg;
86 $bit =~ s/(?<!\x0d)$self->{mycrlf}\Z//sm;
88 my $email = (ref $self)->new($bit);
91 # Remove our changes so we don't change the raw email content
92 $email->header_str_set('Content-Type');
98 $self->{parts} = \@parts;
100 return @{ $self->{parts} };