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MIME::QuotedPrint - Encoding and decoding of quoted-printable strings
use MIME::QuotedPrint;
$encoded = encode_qp($decoded); $decoded = decode_qp($encoded);
This module provides functions to encode and decode strings into and from the quoted-printable encoding specified in RFC 2045 - MIME (Multipurpose Internet Mail Extensions). The quoted-printable encoding is intended to represent data that largely consists of bytes that correspond to printable characters in the ASCII character set. Each non-printable character (as defined by English Americans) is represented by a triplet consisting of the character ``='' followed by two hexadecimal digits.
The following functions are provided:
encode_qp($str)
This function returns an encoded version of the string ($str) given as argument.
The second argument ($eol) is the line-ending sequence to use. It is optional and defaults to ``\n''. Every occurrence of ``\n'' is replaced with this string, and it is also used for additional ``soft line breaks'' to ensure that no line end up longer than 76 characters. Pass it as ``\015\012'' to produce data suitable for external consumption. The string ``\r\n'' produces the same result on many platforms, but not all.
The third argument ($binmode) will select binary mode if passed as a TRUE value. In binary mode ``\n'' will be encoded in the same way as any other non-printable character. This ensures that a decoder will end up with exactly the same string whatever line ending sequence it uses. In general it is preferable to use the base64 encoding for binary data; see the MIME::Base64 manpage.
An $eol of ``'' (the empty string) is special. In this case, no ``soft line breaks'' are introduced and binary mode is effectively enabled so that any ``\n'' in the original data is encoded as well.
This function returns the plain text version of the string given as argument. The lines of the result are ``\n'' terminated, even if the $str argument contains ``\r\n'' terminated lines.
If you prefer not to import these routines into your namespace, you can call them as:
use MIME::QuotedPrint (); $encoded = MIME::QuotedPrint::encode($decoded); $decoded = MIME::QuotedPrint::decode($encoded);
Perl v5.8 and better allow extended Unicode characters in strings. Such strings cannot be encoded directly, as the quoted-printable encoding is only defined for single-byte characters. The solution is to use the Encode module to select the byte encoding you want. For example:
use MIME::QuotedPrint qw(encode_qp);
use Encode qw(encode);
$encoded = encode_qp(encode("UTF-8", "\x{FFFF}\n"));
print $encoded;
Copyright 1995-1997,2002-2004 Gisle Aas.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.