827 lines
22 KiB
PHP
827 lines
22 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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* A MIME entity, in a multipart message.
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*
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* @author Chris Corbyn
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*/
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class Swift_Mime_SimpleMimeEntity implements Swift_Mime_CharsetObserver, Swift_Mime_EncodingObserver
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{
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/** Main message document; there can only be one of these */
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const LEVEL_TOP = 16;
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/** An entity which nests with the same precedence as an attachment */
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const LEVEL_MIXED = 256;
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/** An entity which nests with the same precedence as a mime part */
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const LEVEL_ALTERNATIVE = 4096;
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/** An entity which nests with the same precedence as embedded content */
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const LEVEL_RELATED = 65536;
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/** A collection of Headers for this mime entity */
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private $headers;
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/** The body as a string, or a stream */
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private $body;
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/** The encoder that encodes the body into a streamable format */
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private $encoder;
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/** Message ID generator */
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private $idGenerator;
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/** A mime boundary, if any is used */
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private $boundary;
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/** Mime types to be used based on the nesting level */
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private $compositeRanges = [
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'multipart/mixed' => [self::LEVEL_TOP, self::LEVEL_MIXED],
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'multipart/alternative' => [self::LEVEL_MIXED, self::LEVEL_ALTERNATIVE],
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'multipart/related' => [self::LEVEL_ALTERNATIVE, self::LEVEL_RELATED],
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];
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/** A set of filter rules to define what level an entity should be nested at */
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private $compoundLevelFilters = [];
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/** The nesting level of this entity */
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private $nestingLevel = self::LEVEL_ALTERNATIVE;
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/** A KeyCache instance used during encoding and streaming */
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private $cache;
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/** Direct descendants of this entity */
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private $immediateChildren = [];
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/** All descendants of this entity */
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private $children = [];
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/** The maximum line length of the body of this entity */
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private $maxLineLength = 78;
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/** The order in which alternative mime types should appear */
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private $alternativePartOrder = [
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'text/plain' => 1,
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'text/html' => 2,
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'multipart/related' => 3,
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];
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/** The CID of this entity */
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private $id;
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/** The key used for accessing the cache */
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private $cacheKey;
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protected $userContentType;
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/**
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* Create a new SimpleMimeEntity with $headers, $encoder and $cache.
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*/
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public function __construct(Swift_Mime_SimpleHeaderSet $headers, Swift_Mime_ContentEncoder $encoder, Swift_KeyCache $cache, Swift_IdGenerator $idGenerator)
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{
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$this->cacheKey = bin2hex(random_bytes(16)); // set 32 hex values
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$this->cache = $cache;
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$this->headers = $headers;
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$this->idGenerator = $idGenerator;
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$this->setEncoder($encoder);
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$this->headers->defineOrdering(['Content-Type', 'Content-Transfer-Encoding']);
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// This array specifies that, when the entire MIME document contains
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// $compoundLevel, then for each child within $level, if its Content-Type
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// is $contentType then it should be treated as if it's level is
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// $neededLevel instead. I tried to write that unambiguously! :-\
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// Data Structure:
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// array (
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// $compoundLevel => array(
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// $level => array(
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// $contentType => $neededLevel
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// )
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// )
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// )
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$this->compoundLevelFilters = [
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(self::LEVEL_ALTERNATIVE + self::LEVEL_RELATED) => [
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self::LEVEL_ALTERNATIVE => [
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'text/plain' => self::LEVEL_ALTERNATIVE,
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'text/html' => self::LEVEL_RELATED,
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],
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],
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];
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$this->id = $this->idGenerator->generateId();
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}
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/**
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* Generate a new Content-ID or Message-ID for this MIME entity.
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*
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* @return string
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*/
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public function generateId()
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{
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$this->setId($this->idGenerator->generateId());
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return $this->id;
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}
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/**
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* Get the {@link Swift_Mime_SimpleHeaderSet} for this entity.
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*
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* @return Swift_Mime_SimpleHeaderSet
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*/
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public function getHeaders()
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{
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return $this->headers;
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}
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/**
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* Get the nesting level of this entity.
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*
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* @see LEVEL_TOP, LEVEL_MIXED, LEVEL_RELATED, LEVEL_ALTERNATIVE
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*
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* @return int
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*/
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public function getNestingLevel()
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{
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return $this->nestingLevel;
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}
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/**
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* Get the Content-type of this entity.
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*
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* @return string
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*/
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public function getContentType()
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{
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return $this->getHeaderFieldModel('Content-Type');
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}
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/**
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* Get the Body Content-type of this entity.
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*
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* @return string
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*/
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public function getBodyContentType()
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{
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return $this->userContentType;
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}
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/**
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* Set the Content-type of this entity.
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*
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* @param string $type
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*
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* @return $this
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*/
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public function setContentType($type)
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{
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$this->setContentTypeInHeaders($type);
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// Keep track of the value so that if the content-type changes automatically
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// due to added child entities, it can be restored if they are later removed
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$this->userContentType = $type;
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return $this;
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}
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/**
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* Get the CID of this entity.
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*
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* The CID will only be present in headers if a Content-ID header is present.
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*
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* @return string
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*/
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public function getId()
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{
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$tmp = (array) $this->getHeaderFieldModel($this->getIdField());
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return $this->headers->has($this->getIdField()) ? current($tmp) : $this->id;
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}
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/**
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* Set the CID of this entity.
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*
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* @param string $id
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*
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* @return $this
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*/
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public function setId($id)
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{
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if (!$this->setHeaderFieldModel($this->getIdField(), $id)) {
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$this->headers->addIdHeader($this->getIdField(), $id);
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}
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$this->id = $id;
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return $this;
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}
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/**
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* Get the description of this entity.
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*
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* This value comes from the Content-Description header if set.
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*
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* @return string
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*/
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public function getDescription()
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{
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return $this->getHeaderFieldModel('Content-Description');
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}
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/**
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* Set the description of this entity.
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*
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* This method sets a value in the Content-ID header.
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*
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* @param string $description
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*
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* @return $this
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*/
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public function setDescription($description)
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{
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if (!$this->setHeaderFieldModel('Content-Description', $description)) {
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$this->headers->addTextHeader('Content-Description', $description);
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}
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return $this;
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}
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/**
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* Get the maximum line length of the body of this entity.
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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->maxLineLength;
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}
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/**
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* Set the maximum line length of lines in this body.
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*
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* Though not enforced by the library, lines should not exceed 1000 chars.
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*
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* @param int $length
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*
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* @return $this
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*/
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public function setMaxLineLength($length)
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{
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$this->maxLineLength = $length;
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return $this;
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}
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/**
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* Get all children added to this entity.
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*
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* @return Swift_Mime_SimpleMimeEntity[]
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*/
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public function getChildren()
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{
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return $this->children;
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}
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/**
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* Set all children of this entity.
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*
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* @param Swift_Mime_SimpleMimeEntity[] $children
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* @param int $compoundLevel For internal use only
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*
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* @return $this
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*/
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public function setChildren(array $children, $compoundLevel = null)
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{
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// TODO: Try to refactor this logic
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$compoundLevel = $compoundLevel ?? $this->getCompoundLevel($children);
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$immediateChildren = [];
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$grandchildren = [];
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$newContentType = $this->userContentType;
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foreach ($children as $child) {
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$level = $this->getNeededChildLevel($child, $compoundLevel);
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if (empty($immediateChildren)) {
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//first iteration
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$immediateChildren = [$child];
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} else {
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$nextLevel = $this->getNeededChildLevel($immediateChildren[0], $compoundLevel);
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if ($nextLevel == $level) {
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$immediateChildren[] = $child;
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} elseif ($level < $nextLevel) {
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// Re-assign immediateChildren to grandchildren
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$grandchildren = array_merge($grandchildren, $immediateChildren);
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// Set new children
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$immediateChildren = [$child];
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} else {
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$grandchildren[] = $child;
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}
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}
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}
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if ($immediateChildren) {
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$lowestLevel = $this->getNeededChildLevel($immediateChildren[0], $compoundLevel);
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// Determine which composite media type is needed to accommodate the
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// immediate children
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foreach ($this->compositeRanges as $mediaType => $range) {
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if ($lowestLevel > $range[0] && $lowestLevel <= $range[1]) {
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$newContentType = $mediaType;
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break;
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}
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}
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// Put any grandchildren in a subpart
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if (!empty($grandchildren)) {
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$subentity = $this->createChild();
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$subentity->setNestingLevel($lowestLevel);
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$subentity->setChildren($grandchildren, $compoundLevel);
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array_unshift($immediateChildren, $subentity);
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}
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}
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$this->immediateChildren = $immediateChildren;
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$this->children = $children;
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$this->setContentTypeInHeaders($newContentType);
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$this->fixHeaders();
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$this->sortChildren();
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return $this;
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}
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/**
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* Get the body of this entity as a string.
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*
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* @return string
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*/
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public function getBody()
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{
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return $this->body instanceof Swift_OutputByteStream ? $this->readStream($this->body) : $this->body;
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}
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/**
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* Set the body of this entity, either as a string, or as an instance of
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* {@link Swift_OutputByteStream}.
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*
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* @param mixed $body
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* @param string $contentType optional
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*
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* @return $this
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*/
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public function setBody($body, $contentType = null)
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{
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if ($body !== $this->body) {
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$this->clearCache();
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}
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$this->body = $body;
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if (null !== $contentType) {
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$this->setContentType($contentType);
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}
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return $this;
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}
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/**
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* Get the encoder used for the body of this entity.
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*
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* @return Swift_Mime_ContentEncoder
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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 encoder used for the body of this entity.
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*
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* @return $this
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*/
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public function setEncoder(Swift_Mime_ContentEncoder $encoder)
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{
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if ($encoder !== $this->encoder) {
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$this->clearCache();
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}
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$this->encoder = $encoder;
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$this->setEncoding($encoder->getName());
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$this->notifyEncoderChanged($encoder);
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return $this;
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}
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/**
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* Get the boundary used to separate children in this entity.
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*
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* @return string
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*/
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public function getBoundary()
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{
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if (!isset($this->boundary)) {
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$this->boundary = '_=_swift_'.time().'_'.bin2hex(random_bytes(16)).'_=_';
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}
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return $this->boundary;
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}
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/**
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* Set the boundary used to separate children in this entity.
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*
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* @param string $boundary
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*
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* @throws Swift_RfcComplianceException
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*
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* @return $this
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*/
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public function setBoundary($boundary)
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{
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$this->assertValidBoundary($boundary);
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$this->boundary = $boundary;
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return $this;
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}
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/**
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* Receive notification that the charset of this entity, or a parent entity
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* has changed.
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*
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* @param string $charset
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*/
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public function charsetChanged($charset)
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{
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$this->notifyCharsetChanged($charset);
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}
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/**
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* Receive notification that the encoder of this entity or a parent entity
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* has changed.
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*/
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public function encoderChanged(Swift_Mime_ContentEncoder $encoder)
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{
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$this->notifyEncoderChanged($encoder);
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}
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/**
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* Get this entire entity as a string.
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*
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* @return string
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*/
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public function toString()
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{
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$string = $this->headers->toString();
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$string .= $this->bodyToString();
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return $string;
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}
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/**
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* Get this entire entity as a string.
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*
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* @return string
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*/
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protected function bodyToString()
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{
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$string = '';
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if (isset($this->body) && empty($this->immediateChildren)) {
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if ($this->cache->hasKey($this->cacheKey, 'body')) {
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$body = $this->cache->getString($this->cacheKey, 'body');
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} else {
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$body = "\r\n".$this->encoder->encodeString($this->getBody(), 0, $this->getMaxLineLength());
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$this->cache->setString($this->cacheKey, 'body', $body, Swift_KeyCache::MODE_WRITE);
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}
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$string .= $body;
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}
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if (!empty($this->immediateChildren)) {
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foreach ($this->immediateChildren as $child) {
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$string .= "\r\n\r\n--".$this->getBoundary()."\r\n";
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$string .= $child->toString();
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}
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$string .= "\r\n\r\n--".$this->getBoundary()."--\r\n";
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}
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return $string;
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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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* @see toString()
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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->toString();
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}
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/**
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* Write this entire entity to a {@see Swift_InputByteStream}.
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*/
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public function toByteStream(Swift_InputByteStream $is)
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{
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$is->write($this->headers->toString());
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$is->commit();
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$this->bodyToByteStream($is);
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}
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/**
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* Write this entire entity to a {@link Swift_InputByteStream}.
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*/
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protected function bodyToByteStream(Swift_InputByteStream $is)
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{
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if (empty($this->immediateChildren)) {
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if (isset($this->body)) {
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if ($this->cache->hasKey($this->cacheKey, 'body')) {
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$this->cache->exportToByteStream($this->cacheKey, 'body', $is);
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} else {
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$cacheIs = $this->cache->getInputByteStream($this->cacheKey, 'body');
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if ($cacheIs) {
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$is->bind($cacheIs);
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}
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$is->write("\r\n");
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if ($this->body instanceof Swift_OutputByteStream) {
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$this->body->setReadPointer(0);
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$this->encoder->encodeByteStream($this->body, $is, 0, $this->getMaxLineLength());
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} else {
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$is->write($this->encoder->encodeString($this->getBody(), 0, $this->getMaxLineLength()));
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}
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if ($cacheIs) {
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$is->unbind($cacheIs);
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}
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}
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}
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}
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if (!empty($this->immediateChildren)) {
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foreach ($this->immediateChildren as $child) {
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$is->write("\r\n\r\n--".$this->getBoundary()."\r\n");
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$child->toByteStream($is);
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}
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$is->write("\r\n\r\n--".$this->getBoundary()."--\r\n");
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}
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}
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/**
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* Get the name of the header that provides the ID of this entity.
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*/
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protected function getIdField()
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{
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return 'Content-ID';
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}
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/**
|
|
* Get the model data (usually an array or a string) for $field.
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*/
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protected function getHeaderFieldModel($field)
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{
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if ($this->headers->has($field)) {
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return $this->headers->get($field)->getFieldBodyModel();
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}
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}
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/**
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* Set the model data for $field.
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*/
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protected function setHeaderFieldModel($field, $model)
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{
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if ($this->headers->has($field)) {
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$this->headers->get($field)->setFieldBodyModel($model);
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return true;
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}
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|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Get the parameter value of $parameter on $field header.
|
|
*/
|
|
protected function getHeaderParameter($field, $parameter)
|
|
{
|
|
if ($this->headers->has($field)) {
|
|
return $this->headers->get($field)->getParameter($parameter);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set the parameter value of $parameter on $field header.
|
|
*/
|
|
protected function setHeaderParameter($field, $parameter, $value)
|
|
{
|
|
if ($this->headers->has($field)) {
|
|
$this->headers->get($field)->setParameter($parameter, $value);
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Re-evaluate what content type and encoding should be used on this entity.
|
|
*/
|
|
protected function fixHeaders()
|
|
{
|
|
if (\count($this->immediateChildren)) {
|
|
$this->setHeaderParameter('Content-Type', 'boundary',
|
|
$this->getBoundary()
|
|
);
|
|
$this->headers->remove('Content-Transfer-Encoding');
|
|
} else {
|
|
$this->setHeaderParameter('Content-Type', 'boundary', null);
|
|
$this->setEncoding($this->encoder->getName());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the KeyCache used in this entity.
|
|
*
|
|
* @return Swift_KeyCache
|
|
*/
|
|
protected function getCache()
|
|
{
|
|
return $this->cache;
|
|
}
|
|
|
|
/**
|
|
* Get the ID generator.
|
|
*
|
|
* @return Swift_IdGenerator
|
|
*/
|
|
protected function getIdGenerator()
|
|
{
|
|
return $this->idGenerator;
|
|
}
|
|
|
|
/**
|
|
* Empty the KeyCache for this entity.
|
|
*/
|
|
protected function clearCache()
|
|
{
|
|
$this->cache->clearKey($this->cacheKey, 'body');
|
|
}
|
|
|
|
private function readStream(Swift_OutputByteStream $os)
|
|
{
|
|
$string = '';
|
|
while (false !== $bytes = $os->read(8192)) {
|
|
$string .= $bytes;
|
|
}
|
|
|
|
$os->setReadPointer(0);
|
|
|
|
return $string;
|
|
}
|
|
|
|
private function setEncoding($encoding)
|
|
{
|
|
if (!$this->setHeaderFieldModel('Content-Transfer-Encoding', $encoding)) {
|
|
$this->headers->addTextHeader('Content-Transfer-Encoding', $encoding);
|
|
}
|
|
}
|
|
|
|
private function assertValidBoundary($boundary)
|
|
{
|
|
if (!preg_match('/^[a-z0-9\'\(\)\+_\-,\.\/:=\?\ ]{0,69}[a-z0-9\'\(\)\+_\-,\.\/:=\?]$/Di', $boundary)) {
|
|
throw new Swift_RfcComplianceException('Mime boundary set is not RFC 2046 compliant.');
|
|
}
|
|
}
|
|
|
|
private function setContentTypeInHeaders($type)
|
|
{
|
|
if (!$this->setHeaderFieldModel('Content-Type', $type)) {
|
|
$this->headers->addParameterizedHeader('Content-Type', $type);
|
|
}
|
|
}
|
|
|
|
private function setNestingLevel($level)
|
|
{
|
|
$this->nestingLevel = $level;
|
|
}
|
|
|
|
private function getCompoundLevel($children)
|
|
{
|
|
$level = 0;
|
|
foreach ($children as $child) {
|
|
$level |= $child->getNestingLevel();
|
|
}
|
|
|
|
return $level;
|
|
}
|
|
|
|
private function getNeededChildLevel($child, $compoundLevel)
|
|
{
|
|
$filter = [];
|
|
foreach ($this->compoundLevelFilters as $bitmask => $rules) {
|
|
if (($compoundLevel & $bitmask) === $bitmask) {
|
|
$filter = $rules + $filter;
|
|
}
|
|
}
|
|
|
|
$realLevel = $child->getNestingLevel();
|
|
$lowercaseType = strtolower($child->getContentType());
|
|
|
|
if (isset($filter[$realLevel]) && isset($filter[$realLevel][$lowercaseType])) {
|
|
return $filter[$realLevel][$lowercaseType];
|
|
}
|
|
|
|
return $realLevel;
|
|
}
|
|
|
|
private function createChild()
|
|
{
|
|
return new self($this->headers->newInstance(), $this->encoder, $this->cache, $this->idGenerator);
|
|
}
|
|
|
|
private function notifyEncoderChanged(Swift_Mime_ContentEncoder $encoder)
|
|
{
|
|
foreach ($this->immediateChildren as $child) {
|
|
$child->encoderChanged($encoder);
|
|
}
|
|
}
|
|
|
|
private function notifyCharsetChanged($charset)
|
|
{
|
|
$this->encoder->charsetChanged($charset);
|
|
$this->headers->charsetChanged($charset);
|
|
foreach ($this->immediateChildren as $child) {
|
|
$child->charsetChanged($charset);
|
|
}
|
|
}
|
|
|
|
private function sortChildren()
|
|
{
|
|
$shouldSort = false;
|
|
foreach ($this->immediateChildren as $child) {
|
|
// NOTE: This include alternative parts moved into a related part
|
|
if (self::LEVEL_ALTERNATIVE == $child->getNestingLevel()) {
|
|
$shouldSort = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Sort in order of preference, if there is one
|
|
if ($shouldSort) {
|
|
// Group the messages by order of preference
|
|
$sorted = [];
|
|
foreach ($this->immediateChildren as $child) {
|
|
$type = $child->getContentType();
|
|
$level = \array_key_exists($type, $this->alternativePartOrder) ? $this->alternativePartOrder[$type] : max($this->alternativePartOrder) + 1;
|
|
|
|
if (empty($sorted[$level])) {
|
|
$sorted[$level] = [];
|
|
}
|
|
|
|
$sorted[$level][] = $child;
|
|
}
|
|
|
|
ksort($sorted);
|
|
|
|
$this->immediateChildren = array_reduce($sorted, 'array_merge', []);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Empties it's own contents from the cache.
|
|
*/
|
|
public function __destruct()
|
|
{
|
|
if ($this->cache instanceof Swift_KeyCache) {
|
|
$this->cache->clearAll($this->cacheKey);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Make a deep copy of object.
|
|
*/
|
|
public function __clone()
|
|
{
|
|
$this->headers = clone $this->headers;
|
|
$this->encoder = clone $this->encoder;
|
|
$this->cacheKey = bin2hex(random_bytes(16)); // set 32 hex values
|
|
$children = [];
|
|
foreach ($this->children as $pos => $child) {
|
|
$children[$pos] = clone $child;
|
|
}
|
|
$this->setChildren($children);
|
|
}
|
|
|
|
public function __wakeup()
|
|
{
|
|
$this->cacheKey = bin2hex(random_bytes(16)); // set 32 hex values
|
|
$this->cache = new Swift_KeyCache_ArrayKeyCache(new Swift_KeyCache_SimpleKeyCacheInputStream());
|
|
}
|
|
}
|