man Mail::Message::TransferEnc::Base64 () - encode/decode base64 message bodies

NAME

Mail::Message::TransferEnc::Base64 - encode/decode base64 message bodies

INHERITANCE

 Mail::Message::TransferEnc::Base64
   is a Mail::Message::TransferEnc
   is a Mail::Reporter

SYNOPSIS

 my Mail::Message $msg = ...;
 my $decoded = $msg->decoded;
 my $encoded = $msg->encode(transfer => 'base64');

DESCRIPTION

Encode or decode message bodies with base64. The e-mail protocol and user agents can not handle binary data. Therefore, binary data -but even sometimes non-binary data- is encoded into ASCII, this is transportable.

Base64 re-groups the bits of bytes, and maps them on characters. The data contains bytes of 8 bits (an octet). These are repacked into groups of 6 bits, pointing in an array of characters containing CW[A-Za-z0-9+/]. This way, three data bytes become 4 base64 bytes. The encoded data will be trailed by CW'=' characters to align on four bytes.

METHODS

Constructors

Mail::Message::TransferEnc::Base64->new(OPTIONS) See Constructors in Mail::Reporter

The Encoder

Mail::Message::TransferEnc::Base64->addTransferEncoder(TYPE, CLASS) See The Encoder in Mail::Message::TransferEnc

$obj->create(TYPE, OPTIONS) See The Encoder in Mail::Message::TransferEnc

$obj->name See The Encoder in Mail::Message::TransferEnc

Encoding

$obj->check(BODY, OPTIONS) See Encoding in Mail::Message::TransferEnc

$obj->decode(BODY, OPTIONS)

 Option       Defined in                     Default              
 result_type  L<Mail::Message::TransferEnc>  <type of source body>
. result_type CLASS

$obj->encode(BODY, OPTIONS) See Encoding in Mail::Message::TransferEnc

Error handling

$obj->AUTOLOAD See Error handling in Mail::Reporter

$obj->addReport(OBJECT) See Error handling in Mail::Reporter

$obj->defaultTrace([LEVEL]|[LOGLEVEL, TRACELEVEL]|[LEVEL, CALLBACK])

Mail::Message::TransferEnc::Base64->defaultTrace([LEVEL]|[LOGLEVEL, TRACELEVEL]|[LEVEL, CALLBACK]) See Error handling in Mail::Reporter

$obj->errors See Error handling in Mail::Reporter

$obj->log([LEVEL [,STRINGS]])

Mail::Message::TransferEnc::Base64->log([LEVEL [,STRINGS]]) See Error handling in Mail::Reporter

$obj->logPriority(LEVEL)

Mail::Message::TransferEnc::Base64->logPriority(LEVEL) See Error handling in Mail::Reporter

$obj->logSettings See Error handling in Mail::Reporter

$obj->notImplemented See Error handling in Mail::Reporter

$obj->report([LEVEL]) See Error handling in Mail::Reporter

$obj->reportAll([LEVEL]) See Error handling in Mail::Reporter

$obj->trace([LEVEL]) See Error handling in Mail::Reporter

$obj->warnings See Error handling in Mail::Reporter

Cleanup

$obj->DESTROY See Cleanup in Mail::Reporter

$obj->inGlobalDestruction See Cleanup in Mail::Reporter

DIAGNOSTICS

Warning: Base64 line length not padded on 4.

While decoding base64 the data in a message body, a string was found which was not padded into a multiple of four bytes. This is illegal, and therefore this data is ignored.

Error: Decoder for transfer encoding CW$type does not work: $@

Compiling the required transfer encoding resulted in errors, which means that the decoder can not be used.

Warning: No decoder for transfer encoding CW$type.

A decoder for the specified type of transfer encoding is not implemented.

Error: Package CW$package does not implement CW$method.

Fatal error: the specific package (or one of its superclasses) does not implement this method where it should. This message means that some other related classes do implement this method however the class at hand does not. Probably you should investigate this and probably inform the author of the package.

REFERENCES

See the MailBox website at <http://perl.overmeer.net/mailbox/> for more details.

COPYRIGHTS

Distribution version 2.063. Written by Mark Overmeer (mark@overmeer.net). See the ChangeLog for other contributors.

Copyright (c) 2001-2003 by the author(s). All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.