mirror of
https://github.com/avecms/AVE.cms.git
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504 lines
13 KiB
PHP
504 lines
13 KiB
PHP
<?php
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/*
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* This file is part of SwiftMailer.
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* (c) 2004-2009 Chris Corbyn
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* An abstract base MIME Header.
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*
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* @author Chris Corbyn
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*/
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abstract class Swift_Mime_Headers_AbstractHeader implements Swift_Mime_Header
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{
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/**
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* The name of this Header.
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*
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* @var string
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*/
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private $_name;
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/**
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* The Grammar used for this Header.
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*
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* @var Swift_Mime_Grammar
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*/
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private $_grammar;
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/**
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* The Encoder used to encode this Header.
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*
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* @var Swift_Encoder
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*/
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private $_encoder;
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/**
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* The maximum length of a line in the header.
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*
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* @var int
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*/
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private $_lineLength = 78;
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/**
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* The language used in this Header.
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*
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* @var string
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*/
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private $_lang;
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/**
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* The character set of the text in this Header.
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*
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* @var string
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*/
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private $_charset = 'utf-8';
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/**
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* The value of this Header, cached.
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*
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* @var string
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*/
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private $_cachedValue = null;
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/**
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* Creates a new Header.
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*
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* @param Swift_Mime_Grammar $grammar
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*/
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public function __construct(Swift_Mime_Grammar $grammar)
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{
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$this->setGrammar($grammar);
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}
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/**
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* Set the character set used in this Header.
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*
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* @param string $charset
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*/
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public function setCharset($charset)
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{
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$this->clearCachedValueIf($charset != $this->_charset);
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$this->_charset = $charset;
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if (isset($this->_encoder)) {
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$this->_encoder->charsetChanged($charset);
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}
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}
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/**
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* Get the character set used in this Header.
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*
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* @return string
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*/
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public function getCharset()
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{
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return $this->_charset;
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}
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/**
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* Set the language used in this Header.
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*
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* For example, for US English, 'en-us'.
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* This can be unspecified.
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*
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* @param string $lang
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*/
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public function setLanguage($lang)
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{
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$this->clearCachedValueIf($this->_lang != $lang);
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$this->_lang = $lang;
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}
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/**
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* Get the language used in this Header.
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*
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* @return string
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*/
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public function getLanguage()
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{
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return $this->_lang;
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}
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/**
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* Set the encoder used for encoding the header.
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*
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* @param Swift_Mime_HeaderEncoder $encoder
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*/
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public function setEncoder(Swift_Mime_HeaderEncoder $encoder)
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{
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$this->_encoder = $encoder;
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$this->setCachedValue(null);
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}
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/**
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* Get the encoder used for encoding this Header.
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*
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* @return Swift_Mime_HeaderEncoder
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*/
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public function getEncoder()
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{
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return $this->_encoder;
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}
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/**
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* Set the grammar used for the header.
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*
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* @param Swift_Mime_Grammar $grammar
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*/
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public function setGrammar(Swift_Mime_Grammar $grammar)
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{
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$this->_grammar = $grammar;
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$this->setCachedValue(null);
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}
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/**
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* Get the grammar used for this Header.
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*
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* @return Swift_Mime_Grammar
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*/
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public function getGrammar()
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{
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return $this->_grammar;
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}
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/**
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* Get the name of this header (e.g. charset).
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*
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* @return string
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*/
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public function getFieldName()
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{
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return $this->_name;
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}
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/**
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* Set the maximum length of lines in the header (excluding EOL).
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*
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* @param int $lineLength
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*/
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public function setMaxLineLength($lineLength)
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{
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$this->clearCachedValueIf($this->_lineLength != $lineLength);
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$this->_lineLength = $lineLength;
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}
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/**
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* Get the maximum permitted length of lines in this Header.
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*
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* @return int
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*/
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public function getMaxLineLength()
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{
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return $this->_lineLength;
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}
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/**
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* Get this Header rendered as a RFC 2822 compliant string.
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*
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* @throws Swift_RfcComplianceException
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*
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* @return string
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*/
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public function toString()
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{
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return $this->_tokensToString($this->toTokens());
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}
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/**
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* Returns a string representation of this object.
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*
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* @return string
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*
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* @see toString()
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*/
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public function __toString()
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{
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return $this->toString();
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}
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// -- Points of extension
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/**
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* Set the name of this Header field.
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*
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* @param string $name
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*/
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protected function setFieldName($name)
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{
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$this->_name = $name;
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}
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/**
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* Produces a compliant, formatted RFC 2822 'phrase' based on the string given.
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*
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* @param Swift_Mime_Header $header
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* @param string $string as displayed
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* @param string $charset of the text
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* @param Swift_Mime_HeaderEncoder $encoder
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* @param bool $shorten the first line to make remove for header name
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*
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* @return string
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*/
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protected function createPhrase(Swift_Mime_Header $header, $string, $charset, Swift_Mime_HeaderEncoder $encoder = null, $shorten = false)
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{
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// Treat token as exactly what was given
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$phraseStr = $string;
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// If it's not valid
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if (!preg_match('/^'.$this->getGrammar()->getDefinition('phrase').'$/D', $phraseStr)) {
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// .. but it is just ascii text, try escaping some characters
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// and make it a quoted-string
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if (preg_match('/^'.$this->getGrammar()->getDefinition('text').'*$/D', $phraseStr)) {
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$phraseStr = $this->getGrammar()->escapeSpecials(
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$phraseStr, array('"'), $this->getGrammar()->getSpecials()
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);
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$phraseStr = '"'.$phraseStr.'"';
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} else {
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// ... otherwise it needs encoding
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// Determine space remaining on line if first line
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if ($shorten) {
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$usedLength = strlen($header->getFieldName().': ');
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} else {
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$usedLength = 0;
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}
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$phraseStr = $this->encodeWords($header, $string, $usedLength);
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}
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}
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return $phraseStr;
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}
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/**
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* Encode needed word tokens within a string of input.
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*
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* @param Swift_Mime_Header $header
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* @param string $input
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* @param string $usedLength optional
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*
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* @return string
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*/
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protected function encodeWords(Swift_Mime_Header $header, $input, $usedLength = -1)
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{
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$value = '';
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$tokens = $this->getEncodableWordTokens($input);
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foreach ($tokens as $token) {
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// See RFC 2822, Sect 2.2 (really 2.2 ??)
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if ($this->tokenNeedsEncoding($token)) {
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// Don't encode starting WSP
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$firstChar = substr($token, 0, 1);
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switch ($firstChar) {
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case ' ':
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case "\t":
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$value .= $firstChar;
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$token = substr($token, 1);
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}
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if (-1 == $usedLength) {
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$usedLength = strlen($header->getFieldName().': ') + strlen($value);
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}
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$value .= $this->getTokenAsEncodedWord($token, $usedLength);
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$header->setMaxLineLength(76); // Forcefully override
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} else {
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$value .= $token;
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}
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}
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return $value;
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}
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/**
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* Test if a token needs to be encoded or not.
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*
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* @param string $token
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*
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* @return bool
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*/
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protected function tokenNeedsEncoding($token)
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{
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return preg_match('~[\x00-\x08\x10-\x19\x7F-\xFF\r\n]~', $token);
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}
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/**
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* Splits a string into tokens in blocks of words which can be encoded quickly.
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*
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* @param string $string
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*
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* @return string[]
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*/
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protected function getEncodableWordTokens($string)
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{
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$tokens = array();
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$encodedToken = '';
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// Split at all whitespace boundaries
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foreach (preg_split('~(?=[\t ])~', $string) as $token) {
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if ($this->tokenNeedsEncoding($token)) {
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$encodedToken .= $token;
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} else {
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if (strlen($encodedToken) > 0) {
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$tokens[] = $encodedToken;
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$encodedToken = '';
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}
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$tokens[] = $token;
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}
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}
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if (strlen($encodedToken)) {
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$tokens[] = $encodedToken;
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}
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return $tokens;
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}
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/**
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* Get a token as an encoded word for safe insertion into headers.
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*
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* @param string $token token to encode
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* @param int $firstLineOffset optional
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*
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* @return string
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*/
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protected function getTokenAsEncodedWord($token, $firstLineOffset = 0)
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{
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// Adjust $firstLineOffset to account for space needed for syntax
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$charsetDecl = $this->_charset;
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if (isset($this->_lang)) {
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$charsetDecl .= '*'.$this->_lang;
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}
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$encodingWrapperLength = strlen(
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'=?'.$charsetDecl.'?'.$this->_encoder->getName().'??='
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);
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if ($firstLineOffset >= 75) {
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//Does this logic need to be here?
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$firstLineOffset = 0;
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}
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$encodedTextLines = explode("\r\n",
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$this->_encoder->encodeString(
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$token, $firstLineOffset, 75 - $encodingWrapperLength, $this->_charset
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)
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);
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if (strtolower($this->_charset) !== 'iso-2022-jp') {
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// special encoding for iso-2022-jp using mb_encode_mimeheader
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foreach ($encodedTextLines as $lineNum => $line) {
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$encodedTextLines[$lineNum] = '=?'.$charsetDecl.
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'?'.$this->_encoder->getName().
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'?'.$line.'?=';
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}
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}
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return implode("\r\n ", $encodedTextLines);
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}
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/**
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* Generates tokens from the given string which include CRLF as individual tokens.
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*
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* @param string $token
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*
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* @return string[]
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*/
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protected function generateTokenLines($token)
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{
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return preg_split('~(\r\n)~', $token, -1, PREG_SPLIT_DELIM_CAPTURE);
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}
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/**
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* Set a value into the cache.
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*
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* @param string $value
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*/
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protected function setCachedValue($value)
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{
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$this->_cachedValue = $value;
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}
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/**
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* Get the value in the cache.
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*
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* @return string
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*/
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protected function getCachedValue()
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{
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return $this->_cachedValue;
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}
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/**
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* Clear the cached value if $condition is met.
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*
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* @param bool $condition
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*/
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protected function clearCachedValueIf($condition)
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{
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if ($condition) {
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$this->setCachedValue(null);
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}
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}
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/**
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* Generate a list of all tokens in the final header.
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*
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* @param string $string The string to tokenize
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*
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* @return array An array of tokens as strings
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*/
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protected function toTokens($string = null)
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{
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if (is_null($string)) {
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$string = $this->getFieldBody();
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}
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$tokens = array();
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// Generate atoms; split at all invisible boundaries followed by WSP
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foreach (preg_split('~(?=[ \t])~', $string) as $token) {
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$newTokens = $this->generateTokenLines($token);
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foreach ($newTokens as $newToken) {
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$tokens[] = $newToken;
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}
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}
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return $tokens;
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}
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/**
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* Takes an array of tokens which appear in the header and turns them into
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* an RFC 2822 compliant string, adding FWSP where needed.
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*
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* @param string[] $tokens
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*
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* @return string
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*/
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private function _tokensToString(array $tokens)
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{
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$lineCount = 0;
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$headerLines = array();
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$headerLines[] = $this->_name.': ';
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$currentLine = &$headerLines[$lineCount++];
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// Build all tokens back into compliant header
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foreach ($tokens as $i => $token) {
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// Line longer than specified maximum or token was just a new line
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if (("\r\n" == $token) ||
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($i > 0 && strlen($currentLine.$token) > $this->_lineLength)
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&& 0 < strlen($currentLine)) {
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$headerLines[] = '';
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$currentLine = &$headerLines[$lineCount++];
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}
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// Append token to the line
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if ("\r\n" != $token) {
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$currentLine .= $token;
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}
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}
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// Implode with FWS (RFC 2822, 2.2.3)
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return implode("\r\n", $headerLines)."\r\n";
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}
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}
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