NAME

Email::MIME::RFC2047 - Correct handling of non-ASCII MIME headers

SYNOPSIS

 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')
 );

DESCRIPTION

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

TODO

Parsing of address headers is at an alpha stage at the moment.

Comments as defined by RFC 822 are not supported.

AUTHOR

Nick Wellnhofer <wellnhofer@aevum.de>

COPYRIGHT AND LICENSE

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.