1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
<?php
/*
* This file is part of SwiftMailer.
* (c) 2004-2009 Chris Corbyn
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
//@require 'Swift/Mime/ContentEncoder.php';
//@require 'Swift/InputByteStream.php';
//@require 'Swift/OutputByteStream.php';
/**
* Handles binary/7/8-bit Transfer Encoding in Swift Mailer.
* @package Swift
* @subpackage Mime
* @author Chris Corbyn
*/
class Swift_Mime_ContentEncoder_PlainContentEncoder
implements Swift_Mime_ContentEncoder
{
/**
* The name of this encoding scheme (probably 7bit or 8bit).
* @var string
* @access private
*/
private $_name;
/**
* True if canonical transformations should be done.
* @var boolean
* @access private
*/
private $_canonical;
/**
* Creates a new PlainContentEncoder with $name (probably 7bit or 8bit).
* @param string $name
* @param boolean $canonical If canonicalization transformation should be done.
*/
public function __construct($name, $canonical = false)
{
$this->_name = $name;
$this->_canonical = $canonical;
}
/**
* Encode a given string to produce an encoded string.
* @param string $string
* @param int $firstLineOffset, ignored
* @param int $maxLineLength - 0 means no wrapping will occur
* @return string
*/
public function encodeString($string, $firstLineOffset = 0,
$maxLineLength = 0)
{
if ($this->_canonical)
{
$string = $this->_canonicalize($string);
}
return $this->_safeWordWrap($string, $maxLineLength, "\r\n");
}
/**
* Encode stream $in to stream $out.
* @param Swift_OutputByteStream $in
* @param Swift_InputByteStream $out
* @param int $firstLineOffset, ignored
* @param int $maxLineLength, optional, 0 means no wrapping will occur
*/
public function encodeByteStream(
Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0,
$maxLineLength = 0)
{
$leftOver = '';
while (false !== $bytes = $os->read(8192))
{
$toencode = $leftOver . $bytes;
if ($this->_canonical)
{
$toencode = $this->_canonicalize($toencode);
}
$wrapped = $this->_safeWordWrap($toencode, $maxLineLength, "\r\n");
$lastLinePos = strrpos($wrapped, "\r\n");
$leftOver = substr($wrapped, $lastLinePos);
$wrapped = substr($wrapped, 0, $lastLinePos);
$is->write($wrapped);
}
if (strlen($leftOver))
{
$is->write($leftOver);
}
}
/**
* Get the name of this encoding scheme.
* @return string
*/
public function getName()
{
return $this->_name;
}
/**
* Not used.
*/
public function charsetChanged($charset)
{
}
// -- Private methods
/**
* A safer (but weaker) wordwrap for unicode.
* @param string $string
* @param int $length
* @param string $le
* @return string
* @access private
*/
private function _safeWordwrap($string, $length = 75, $le = "\r\n")
{
if (0 >= $length)
{
return $string;
}
$originalLines = explode($le, $string);
$lines = array();
$lineCount = 0;
foreach ($originalLines as $originalLine)
{
$lines[] = '';
$currentLine =& $lines[$lineCount++];
//$chunks = preg_split('/(?<=[\ \t,\.!\?\-&\+\/])/', $originalLine);
$chunks = preg_split('/(?<=\s)/', $originalLine);
foreach ($chunks as $chunk)
{
if (0 != strlen($currentLine)
&& strlen($currentLine . $chunk) > $length)
{
$lines[] = '';
$currentLine =& $lines[$lineCount++];
}
$currentLine .= $chunk;
}
}
return implode("\r\n", $lines);
}
/**
* Canonicalize string input (fix CRLF).
* @param string $string
* @return string
* @access private
*/
private function _canonicalize($string)
{
return str_replace(
array("\r\n", "\r", "\n"),
array("\n", "\n", "\r\n"),
$string
);
}
}
|
