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129 | .\" ======================================================================== | |
130 | .\" | |
131 | .IX Title "MIME::QuotedPrint 3" | |
132 | .TH MIME::QuotedPrint 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide" | |
133 | .SH "NAME" | |
134 | MIME::QuotedPrint \- Encoding and decoding of quoted\-printable strings | |
135 | .SH "SYNOPSIS" | |
136 | .IX Header "SYNOPSIS" | |
137 | .Vb 1 | |
138 | \& use MIME::QuotedPrint; | |
139 | .Ve | |
140 | .PP | |
141 | .Vb 2 | |
142 | \& $encoded = encode_qp($decoded); | |
143 | \& $decoded = decode_qp($encoded); | |
144 | .Ve | |
145 | .SH "DESCRIPTION" | |
146 | .IX Header "DESCRIPTION" | |
147 | This module provides functions to encode and decode strings into and from the | |
148 | quoted-printable encoding specified in \s-1RFC\s0 2045 \- \fI\s-1MIME\s0 (Multipurpose | |
149 | Internet Mail Extensions)\fR. The quoted-printable encoding is intended | |
150 | to represent data that largely consists of bytes that correspond to | |
151 | printable characters in the \s-1ASCII\s0 character set. Each non-printable | |
152 | character (as defined by English Americans) is represented by a | |
153 | triplet consisting of the character \*(L"=\*(R" followed by two hexadecimal | |
154 | digits. | |
155 | .PP | |
156 | The following functions are provided: | |
157 | .IP "encode_qp($str)" 4 | |
158 | .IX Item "encode_qp($str)" | |
159 | .PD 0 | |
160 | .ie n .IP "encode_qp($str, $eol)" 4 | |
161 | .el .IP "encode_qp($str, \f(CW$eol\fR)" 4 | |
162 | .IX Item "encode_qp($str, $eol)" | |
163 | .ie n .IP "encode_qp($str, $eol\fR, \f(CW$binmode)" 4 | |
164 | .el .IP "encode_qp($str, \f(CW$eol\fR, \f(CW$binmode\fR)" 4 | |
165 | .IX Item "encode_qp($str, $eol, $binmode)" | |
166 | .PD | |
167 | This function returns an encoded version of the string ($str) given as | |
168 | argument. | |
169 | .Sp | |
170 | The second argument ($eol) is the line-ending sequence to use. It is | |
171 | optional and defaults to \*(L"\en\*(R". Every occurrence of \*(L"\en\*(R" is replaced | |
172 | with this string, and it is also used for additional \*(L"soft line | |
173 | breaks\*(R" to ensure that no line end up longer than 76 characters. Pass | |
174 | it as \*(L"\e015\e012\*(R" to produce data suitable for external consumption. | |
175 | The string \*(L"\er\en\*(R" produces the same result on many platforms, but not | |
176 | all. | |
177 | .Sp | |
178 | The third argument ($binmode) will select binary mode if passed as a | |
179 | \&\s-1TRUE\s0 value. In binary mode \*(L"\en\*(R" will be encoded in the same way as | |
180 | any other non-printable character. This ensures that a decoder will | |
181 | end up with exactly the same string whatever line ending sequence it | |
182 | uses. In general it is preferable to use the base64 encoding for | |
183 | binary data; see MIME::Base64. | |
184 | .Sp | |
185 | An \f(CW$eol\fR of "\*(L" (the empty string) is special. In this case, no \*(R"soft | |
186 | line breaks\*(L" are introduced and binary mode is effectively enabled so | |
187 | that any \*(R"\en" in the original data is encoded as well. | |
188 | .IP "decode_qp($str);" 4 | |
189 | .IX Item "decode_qp($str);" | |
190 | This function returns the plain text version of the string given | |
191 | as argument. The lines of the result are \*(L"\en\*(R" terminated, even if | |
192 | the \f(CW$str\fR argument contains \*(L"\er\en\*(R" terminated lines. | |
193 | .PP | |
194 | If you prefer not to import these routines into your namespace, you can | |
195 | call them as: | |
196 | .PP | |
197 | .Vb 3 | |
198 | \& use MIME::QuotedPrint (); | |
199 | \& $encoded = MIME::QuotedPrint::encode($decoded); | |
200 | \& $decoded = MIME::QuotedPrint::decode($encoded); | |
201 | .Ve | |
202 | .PP | |
203 | Perl v5.8 and better allow extended Unicode characters in strings. | |
204 | Such strings cannot be encoded directly, as the quoted-printable | |
205 | encoding is only defined for single-byte characters. The solution is | |
206 | to use the Encode module to select the byte encoding you want. For | |
207 | example: | |
208 | .PP | |
209 | .Vb 2 | |
210 | \& use MIME::QuotedPrint qw(encode_qp); | |
211 | \& use Encode qw(encode); | |
212 | .Ve | |
213 | .PP | |
214 | .Vb 2 | |
215 | \& $encoded = encode_qp(encode("UTF-8", "\ex{FFFF}\en")); | |
216 | \& print $encoded; | |
217 | .Ve | |
218 | .SH "COPYRIGHT" | |
219 | .IX Header "COPYRIGHT" | |
220 | Copyright 1995\-1997,2002\-2004 Gisle Aas. | |
221 | .PP | |
222 | This library is free software; you can redistribute it and/or | |
223 | modify it under the same terms as Perl itself. | |
224 | .SH "SEE ALSO" | |
225 | .IX Header "SEE ALSO" | |
226 | MIME::Base64 |