.\" Automatically generated by Pod::Man 2.28 (Pod::Simple 3.28) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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No user-serviceable parts. . \" fudge factors for nroff and troff .if n \{\ . ds #H 0 . ds #V .8m . ds #F .3m . ds #[ \f1 . ds #] \fP .\} .if t \{\ . ds #H ((1u-(\\\\n(.fu%2u))*.13m) . ds #V .6m . ds #F 0 . ds #[ \& . ds #] \& .\} . \" simple accents for nroff and troff .if n \{\ . ds ' \& . ds ` \& . ds ^ \& . ds , \& . ds ~ ~ . ds / .\} .if t \{\ . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' .\} . \" troff and (daisy-wheel) nroff accents .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' .ds 8 \h'\*(#H'\(*b\h'-\*(#H' .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] .ds ae a\h'-(\w'a'u*4/10)'e .ds Ae A\h'-(\w'A'u*4/10)'E . \" corrections for vroff .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' . \" for low resolution devices (crt and lpr) .if \n(.H>23 .if \n(.V>19 \ \{\ . ds : e . ds 8 ss . ds o a . ds d- d\h'-1'\(ga . ds D- D\h'-1'\(hy . ds th \o'bp' . ds Th \o'LP' . ds ae ae . ds Ae AE .\} .rm #[ #] #H #V #F C .\" ======================================================================== .\" .IX Title "Encode::MIME::Header 3pm" .TH Encode::MIME::Header 3pm "2014-10-19" "perl v5.20.2" "User Contributed Perl Documentation" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" Encode::MIME::Header \-\- MIME 'B' and 'Q' header encoding .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 3 \& use Encode qw/encode decode/; \& $utf8 = decode(\*(AqMIME\-Header\*(Aq, $header); \& $header = encode(\*(AqMIME\-Header\*(Aq, $utf8); .Ve .SH "ABSTRACT" .IX Header "ABSTRACT" This module implements \s-1RFC 2047\s0 Mime Header Encoding. There are 3 variant encoding names; \f(CW\*(C`MIME\-Header\*(C'\fR, \f(CW\*(C`MIME\-B\*(C'\fR and \f(CW\*(C`MIME\-Q\*(C'\fR. The difference is described below .PP .Vb 5 \& decode() encode() \& \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- \& MIME\-Header Both B and Q =?UTF\-8?B?....?= \& MIME\-B B only; Q croaks =?UTF\-8?B?....?= \& MIME\-Q Q only; B croaks =?UTF\-8?Q?....?= .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" When you decode(=?\fIencoding\fR?\fIX\fR?\fI\s-1ENCODED WORD\s0\fR?=), \fI\s-1ENCODED WORD\s0\fR is extracted and decoded for \fIX\fR encoding (B for Base64, Q for Quoted-Printable). Then the decoded chunk is fed to decode(\fIencoding\fR). So long as \fIencoding\fR is supported by Encode, any source encoding is fine. .PP When you encode, it just encodes \s-1UTF\-8\s0 string with \fIX\fR encoding then quoted with =?UTF\-8?\fIX\fR?....?= . The parts that \s-1RFC 2047\s0 forbids to encode are left as is and long lines are folded within 76 bytes per line. .SH "BUGS" .IX Header "BUGS" It would be nice to support encoding to non\-UTF8, such as =?ISO\-2022\-JP? and =?ISO\-8859\-1?= but that makes the implementation too complicated. These days major mail agents all support =?UTF\-8? so I think it is just good enough. .PP Due to popular demand, 'MIME\-Header\-ISO_2022_JP' was introduced by Makamaka. Thre are still too many MUAs especially cellular phone handsets which does not grok \s-1UTF\-8.\s0 .SH "SEE ALSO" .IX Header "SEE ALSO" Encode .PP \&\s-1RFC 2047, \s0 and many other locations.