/**
* Get a token as an encoded word for safe insertion into headers.
* @param string $token to encode
* @param int $firstLineOffset, optional
* @return string
*/
protected function getTokenAsEncodedWord($token, $firstLineOffset = 0)
{
//Adjust $firstLineOffset to account for space needed for syntax
$charsetDecl = $this->_charset;
if (isset($this->_lang))
{
$charsetDecl .= '*' . $this->_lang;
}
$encodingWrapperLength = strlen(
'=?' . $charsetDecl . '?' . $this->_encoder->getName() . '??='
);
if ($firstLineOffset >= 75) //Does this logic need to be here?
{
$firstLineOffset = 0;
}
$encodedTextLines = explode("\r\n",
$this->_encoder->encodeString(
$token, $firstLineOffset, 75 - $encodingWrapperLength
)
);
foreach ($encodedTextLines as $lineNum => $line)
{
$encodedTextLines[$lineNum] = '=?' . $charsetDecl .
'?' . $this->_encoder->getName() .
'?' . $line . '?=';
}
return implode("\r\n ", $encodedTextLines);
}
/**
* Get a token as an encoded word for safe insertion into headers.
*
* @param string $token token to encode
* @param int $firstLineOffset optional
*
* @return string
*/
protected function getTokenAsEncodedWord($token, $firstLineOffset = 0)
{
// Adjust $firstLineOffset to account for space needed for syntax
$charsetDecl = $this->charset;
if (isset($this->lang)) {
$charsetDecl .= '*' . $this->lang;
}
$encodingWrapperLength = strlen('=?' . $charsetDecl . '?' . $this->encoder->getName() . '??=');
if ($firstLineOffset >= 75) {
//Does this logic need to be here?
$firstLineOffset = 0;
}
$encodedTextLines = explode("\r\n", $this->encoder->encodeString($token, $firstLineOffset, 75 - $encodingWrapperLength, $this->charset));
if (strtolower($this->charset) !== 'iso-2022-jp') {
// special encoding for iso-2022-jp using mb_encode_mimeheader
foreach ($encodedTextLines as $lineNum => $line) {
$encodedTextLines[$lineNum] = '=?' . $charsetDecl . '?' . $this->encoder->getName() . '?' . $line . '?=';
}
}
return implode("\r\n ", $encodedTextLines);
}
/**
* Render a RFC 2047 compliant header parameter from the $name and $value.
*
* @param string $name
* @param string $value
*
* @return string
*/
private function _createParameter($name, $value)
{
$origValue = $value;
$encoded = false;
// Allow room for parameter name, indices, "=" and DQUOTEs
$maxValueLength = $this->getMaxLineLength() - strlen($name . '=*N"";') - 1;
$firstLineOffset = 0;
// If it's not already a valid parameter value...
if (!preg_match('/^' . self::TOKEN_REGEX . '$/D', $value)) {
// TODO: text, or something else??
// ... and it's not ascii
if (!preg_match('/^' . $this->getGrammar()->getDefinition('text') . '*$/D', $value)) {
$encoded = true;
// Allow space for the indices, charset and language
$maxValueLength = $this->getMaxLineLength() - strlen($name . '*N*="";') - 1;
$firstLineOffset = strlen($this->getCharset() . "'" . $this->getLanguage() . "'");
}
}
// Encode if we need to
if ($encoded || strlen($value) > $maxValueLength) {
if (isset($this->_paramEncoder)) {
$value = $this->_paramEncoder->encodeString($origValue, $firstLineOffset, $maxValueLength, $this->getCharset());
} else {
// We have to go against RFC 2183/2231 in some areas for interoperability
$value = $this->getTokenAsEncodedWord($origValue);
$encoded = false;
}
}
$valueLines = isset($this->_paramEncoder) ? explode("\r\n", $value) : array($value);
// Need to add indices
if (count($valueLines) > 1) {
$paramLines = array();
foreach ($valueLines as $i => $line) {
$paramLines[] = $name . '*' . $i . $this->_getEndOfParameterValue($line, true, $i == 0);
}
return implode(";\r\n ", $paramLines);
} else {
return $name . $this->_getEndOfParameterValue($valueLines[0], $encoded, true);
}
}