Email::MIME::RFC2047 - Correct handling of non-ASCII MIME headers
use Email::MIME; # create headers with non-ASCII chars use Email::MIME::RFC2047::Encoder; use Email::MIME::RFC2047::Mailbox; my $email = Email::MIME->create(); my $encoder = Email::MIME::RFC2047::Encoder->new( encoding => 'utf-8', method => 'Q', ); $email->header_set(Subject => $encoder->encode_text($non_ascii_subject)); my $to_address = Email::MIME::RFC2047::Mailbox->new( name => $non_ascii_name, address => $email_address, ); $email->header_set(To => $to_address->format($encoder)); # parse headers with non-ASCII chars use Email::MIME::RFC2047::Decoder; my $email = Email::MIME->new($message); my $decoder = Email::MIME::RFC2047::Decoder->new(); my $subject = $decoder->decode_text($email->header('Subject')); my $to_address = Email::MIME::RFC2047::AddressList->parse( $email->header('To') );
This set of modules tries to provide a correct and usable implementation of RFC 2047 "MIME Part Three: Message Header Extensions for Non-ASCII Text". The Encode module also provides RFC 2047 encoding and decoding but it still has some bugs regarding strict standards compatibility. More importantly, a useful API should handle the different situations where RFC 2047 encoded headers are used. Section 5 of the RFC defines three use cases for 'encoded-words':
(1) As a replacement of 'text' tokens, for example in a Subject header
(2) In comments, this case isn't handled by this module
(3) As a replacement for a 'word' entity within a 'phrase', for example, one that precedes an address in a From, To, or Cc header
Especially, case (3) requires the handling of quoted strings as defined by RFC 822. So the encoding and decoding modules provide separate methods for the handling of text and phrases.
Since parsing and encoding of phrases makes up the bulk of handling address headers like From, To or Cc, additional modules to handle these headers are also provided.
See Email::MIME::RFC2047::Encoder for encoding
See Email::MIME::RFC2047::Decoder for decoding
See Email::MIME::RFC2047::Mailbox for handling of Sender headers
See Email::MIME::RFC2047::MailboxList for handling of From headers
See Email::MIME::RFC2047::AddressList for handling of Reply-To, To, Cc and Bcc headers
See Email::MIME::RFC2047::Group for handling groups of mailboxes
Parsing of address headers is at an alpha stage at the moment.
Comments as defined by RFC 822 are not supported.
Nick Wellnhofer <email@example.com>
Copyright (C) Nick Wellnhofer, 2009
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.0 or, at your option, any later version of Perl 5 you may have available.