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.IX Title "MIME::QuotedPrint 3"
.TH MIME::QuotedPrint 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide"
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 \s-1RFC\s0 2045 \- \fI\s-1MIME\s0 (Multipurpose
Internet Mail Extensions)\fR. The quoted-printable encoding is intended
to represent data that largely consists of bytes that correspond to
printable characters in the \s-1ASCII\s0 character set. Each non-printable
character (as defined by English Americans) is represented by a
triplet consisting of the character \*(L"=\*(R" followed by two hexadecimal
The following functions are provided:
.IX Item "encode_qp($str)"
.ie n .IP "encode_qp($str, $eol)" 4
.el .IP "encode_qp($str, \f(CW$eol\fR)" 4
.IX Item "encode_qp($str, $eol)"
.ie n .IP "encode_qp($str, $eol\fR, \f(CW$binmode)" 4
.el .IP "encode_qp($str, \f(CW$eol\fR, \f(CW$binmode\fR)" 4
.IX Item "encode_qp($str, $eol, $binmode)"
This function returns an encoded version of the string ($str) given as
The second argument ($eol) is the line-ending sequence to use. It is
optional and defaults to \*(L"\en\*(R". Every occurrence of \*(L"\en\*(R" is replaced
with this string, and it is also used for additional \*(L"soft line
breaks\*(R" to ensure that no line end up longer than 76 characters. Pass
it as \*(L"\e015\e012\*(R" to produce data suitable for external consumption.
The string \*(L"\er\en\*(R" produces the same result on many platforms, but not
The third argument ($binmode) will select binary mode if passed as a
\&\s-1TRUE\s0 value. In binary mode \*(L"\en\*(R" 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 MIME::Base64.
An \f(CW$eol\fR of "\*(L" (the empty string) is special. In this case, no \*(R"soft
line breaks\*(L" are introduced and binary mode is effectively enabled so
that any \*(R"\en" in the original data is encoded as well.
.IX Item "decode_qp($str);"
This function returns the plain text version of the string given
as argument. The lines of the result are \*(L"\en\*(R" terminated, even if
the \f(CW$str\fR argument contains \*(L"\er\en\*(R" terminated lines.
If you prefer not to import these routines into your namespace, you can
\& 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
\& use MIME::QuotedPrint qw(encode_qp);
\& use Encode qw(encode);
\& $encoded = encode_qp(encode("UTF-8", "\ex{FFFF}\en"));
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.