From ffae15e5fcde50cf8c1b168fa313f4ec3454a693 Mon Sep 17 00:00:00 2001
From: alecpl <alec@alec.pl>
Date: Mon, 29 Sep 2008 03:38:16 -0400
Subject: [PATCH] - Added 'mime_param_folding' option with possibility to choose long/non-ascii attachment names encoding eg. to be readable in MS Outlook/OE (#1485320) - Added "advanced options" feature in User Preferences
---
program/lib/Mail/mimePart.php | 112 +++++++++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 99 insertions(+), 13 deletions(-)
diff --git a/program/lib/Mail/mimePart.php b/program/lib/Mail/mimePart.php
index bd30477..9b9f26c 100644
--- a/program/lib/Mail/mimePart.php
+++ b/program/lib/Mail/mimePart.php
@@ -182,13 +182,16 @@
}
}
+
if (isset($contentType['type'])) {
$headers['Content-Type'] = $contentType['type'];
if (isset($contentType['name'])) {
$headers['Content-Type'] .= ';' . MAIL_MIMEPART_CRLF;
- $headers['Content-Type'] .= $this->_buildHeaderParam('name', $contentType['name'],
- isset($contentType['charset']) ? $contentType['charset'] : 'US-ASCII',
- isset($contentType['language']) ? $contentType['language'] : NULL);
+ $headers['Content-Type'] .=
+ $this->_buildHeaderParam('name', $contentType['name'],
+ isset($contentType['charset']) ? $contentType['charset'] : 'US-ASCII',
+ isset($contentType['language']) ? $contentType['language'] : NULL,
+ isset($params['name-encoding']) ? $params['name-encoding'] : NULL);
} elseif (isset($contentType['charset'])) {
$headers['Content-Type'] .= "; charset=\"{$contentType['charset']}\"";
}
@@ -199,15 +202,14 @@
$headers['Content-Disposition'] = $contentDisp['disp'];
if (isset($contentDisp['filename'])) {
$headers['Content-Disposition'] .= ';' . MAIL_MIMEPART_CRLF;
- $headers['Content-Disposition'] .= $this->_buildHeaderParam('filename', $contentDisp['filename'],
- isset($contentDisp['charset']) ? $contentDisp['charset'] : 'US-ASCII',
- isset($contentDisp['language']) ? $contentDisp['language'] : NULL);
+ $headers['Content-Disposition'] .=
+ $this->_buildHeaderParam('filename', $contentDisp['filename'],
+ isset($contentDisp['charset']) ? $contentDisp['charset'] : 'US-ASCII',
+ isset($contentDisp['language']) ? $contentDisp['language'] : NULL,
+ isset($params['filename-encoding']) ? $params['filename-encoding'] : NULL);
}
}
-
-
-
-
+
// Default content-type
if (!isset($headers['Content-Type'])) {
$headers['Content-Type'] = 'text/plain';
@@ -388,20 +390,24 @@
* @param $value The value of the paramter
* @param $charset The characterset of $value
* @param $language The language used in $value
+ * @param $paramEnc Parameter encoding type
* @param $maxLength The maximum length of a line. Defauls to 78
*
* @access private
*/
- function _buildHeaderParam($name, $value, $charset=NULL, $language=NULL, $maxLength=78)
+ function _buildHeaderParam($name, $value, $charset=NULL, $language=NULL, $paramEnc=NULL, $maxLength=78)
{
// RFC 2183/2184/2822:
// value needs encoding if contains non-ASCII chars or is longer than 78 chars
-
if (!preg_match('#[^\x20-\x7E]#', $value)) { // ASCII
$quoted = addcslashes($value, '\\"');
if (strlen($name) + strlen($quoted) + 6 <= $maxLength)
return " {$name}=\"{$quoted}\"; ";
}
+
+ // use quoted-printable/base64 encoding (RFC2047)
+ if ($paramEnc == 'quoted-printable' || $paramEnc == 'base64')
+ return $this->_buildRFC2047Param($name, $value, $charset, $paramEnc);
$encValue = preg_replace('#([^\x20-\x7E])#e', '"%" . strtoupper(dechex(ord("\1")))', $value);
$value = "$charset'$language'$encValue";
@@ -413,7 +419,7 @@
$preLength = strlen(" {$name}*0*=\"");
$sufLength = strlen("\";");
- $maxLength = MAX(16, $maxLength - $preLength - $sufLength - 2);
+ $maxLength = max(16, $maxLength - $preLength - $sufLength - 2);
$maxLengthReg = "|(.{0,$maxLength}[^\%][^\%])|";
$headers = array();
@@ -433,4 +439,84 @@
$headers = implode(MAIL_MIMEPART_CRLF, $headers) . ';';
return $headers;
}
+
+ /**
+ * Encodes header parameter as per RFC2047 if needed (values too long will be truncated)
+ *
+ * @param string $name The parameter name
+ * @param string $value The parameter value
+ * @param string $charset The parameter charset
+ * @param string $encoding Encoding type (quoted-printable or base64)
+ * @param int $maxLength Encoded parameter max length (75 is the value specified in the RFC)
+ *
+ * @return string Parameter line
+ * @access private
+ */
+ function _buildRFC2047Param($name, $value, $charset, $encoding='quoted-printable', $maxLength=75)
+ {
+ if (!preg_match('#([^\x20-\x7E]){1}#', $value))
+ {
+ $quoted = addcslashes($value, '\\"');
+ $maxLength = $maxLength - 6;
+ if (strlen($quoted) > $maxLength)
+ {
+ // truncate filename leaving extension
+ $ext = strrchr($quoted, '.');
+ $quoted = substr($quoted, 0, $maxLength - strlen($ext));
+ // remove backslashes from the end of filename
+ preg_replace('/[\\\\]+$/', '', $quoted);
+ $quoted .= $ext;
+ }
+ }
+ else if ($encoding == 'base64')
+ {
+ $ext = strrchr($value, '.');
+ $value = substr($value, 0, strlen($value) - strlen($ext));
+
+ $ext = base64_encode($ext);
+ $value = base64_encode($value);
+
+ $prefix = '=?' . $charset . '?B?';
+ $suffix = '?=';
+ $maxLength = $maxLength - strlen($prefix . $suffix) - strlen($ext) - 2;
+
+ //We can cut base64 every 4 characters, so the real max
+ //we can get must be rounded down.
+ $maxLength = $maxLength - ($maxLength % 4);
+ $quoted = $prefix . substr($value, 0, $maxLength) . $ext . $suffix;
+ }
+ else // quoted-printable
+ {
+ $ext = strrchr($value, '.');
+ $value = substr($value, 0, strlen($value) - strlen($ext));
+
+ // Replace all special characters used by the encoder.
+ $search = array('=', '_', '?', ' ');
+ $replace = array('=3D', '=5F', '=3F', '_');
+ $ext = str_replace($search, $replace, $ext);
+ $value = str_replace($search, $replace, $value);
+
+ // Replace all extended characters (\x80-xFF) with their
+ // ASCII values.
+ $ext = preg_replace('/([\x80-\xFF])/e',
+ '"=" . strtoupper(dechex(ord("\1")))', $ext);
+ $value = preg_replace('/([\x80-\xFF])/e',
+ '"=" . strtoupper(dechex(ord("\1")))', $value);
+
+ $prefix = '=?' . $charset . '?Q?';
+ $suffix = '?=';
+
+ $maxLength = $maxLength - strlen($prefix . $suffix) - strlen($ext) - 2;
+
+ // Truncate QP-encoded text at $maxLength
+ // but not break any encoded letters.
+ if(preg_match("/^(.{0,$maxLength}[^\=][^\=])/", $value, $matches))
+ $value = $matches[1];
+
+ $quoted = $prefix . $value . $ext . $suffix;
+ }
+
+ return " {$name}=\"{$quoted}\"; ";
+ }
+
} // End of class
--
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