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8ca5581a9c
Summary: Mail clients can send messages where the body is represented as 'inline' attachments. Don't treat any such text attachments as actual attachments. Test Plan: toulouse, can you verify this fixes the issue? Reviewed By: toulouse Reviewers: toulouse CC: aran, toulouse, epriestley Differential Revision: 441
459 lines
12 KiB
PHP
459 lines
12 KiB
PHP
<?php
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require_once('attachment.class.php');
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/**
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* Fast Mime Mail parser Class using PHP's MailParse Extension
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* @author gabe@fijiwebdesign.com
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* @url http://www.fijiwebdesign.com/
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* @license http://creativecommons.org/licenses/by-sa/3.0/us/
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* @version $Id$
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*/
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class MimeMailParser {
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/**
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* PHP MimeParser Resource ID
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*/
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public $resource;
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/**
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* A file pointer to email
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*/
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public $stream;
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/**
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* A text of an email
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*/
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public $data;
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/**
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* Stream Resources for Attachments
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*/
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public $attachment_streams;
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/**
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* Inialize some stuff
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* @return
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*/
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public function __construct() {
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$this->attachment_streams = array();
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}
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/**
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* Free the held resouces
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* @return void
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*/
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public function __destruct() {
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// clear the email file resource
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if (is_resource($this->stream)) {
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fclose($this->stream);
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}
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// clear the MailParse resource
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if (is_resource($this->resource)) {
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mailparse_msg_free($this->resource);
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}
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// remove attachment resources
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foreach($this->attachment_streams as $stream) {
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fclose($stream);
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}
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}
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/**
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* Set the file path we use to get the email text
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* @return Object MimeMailParser Instance
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* @param $mail_path Object
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*/
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public function setPath($path) {
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// should parse message incrementally from file
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$this->resource = mailparse_msg_parse_file($path);
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$this->stream = fopen($path, 'r');
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$this->parse();
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return $this;
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}
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/**
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* Set the Stream resource we use to get the email text
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* @return Object MimeMailParser Instance
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* @param $stream Resource
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*/
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public function setStream($stream) {
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// streams have to be cached to file first
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if (get_resource_type($stream) == 'stream') {
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$tmp_fp = tmpfile();
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if ($tmp_fp) {
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while(!feof($stream)) {
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fwrite($tmp_fp, fread($stream, 2028));
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}
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fseek($tmp_fp, 0);
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$this->stream =& $tmp_fp;
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} else {
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throw new Exception('Could not create temporary files for attachments. Your tmp directory may be unwritable by PHP.');
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return false;
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}
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fclose($stream);
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} else {
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$this->stream = $stream;
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}
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$this->resource = mailparse_msg_create();
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// parses the message incrementally low memory usage but slower
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while(!feof($this->stream)) {
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mailparse_msg_parse($this->resource, fread($this->stream, 2082));
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}
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$this->parse();
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return $this;
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}
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/**
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* Set the email text
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* @return Object MimeMailParser Instance
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* @param $data String
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*/
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public function setText($data) {
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$this->resource = mailparse_msg_create();
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// does not parse incrementally, fast memory hog might explode
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mailparse_msg_parse($this->resource, $data);
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$this->data = $data;
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$this->parse();
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return $this;
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}
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/**
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* Parse the Message into parts
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* @return void
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* @private
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*/
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private function parse() {
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$structure = mailparse_msg_get_structure($this->resource);
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$this->parts = array();
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foreach($structure as $part_id) {
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$part = mailparse_msg_get_part($this->resource, $part_id);
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$this->parts[$part_id] = mailparse_msg_get_part_data($part);
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}
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}
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/**
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* Retrieve the Email Headers
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* @return Array
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*/
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public function getHeaders() {
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if (isset($this->parts[1])) {
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return $this->getPartHeaders($this->parts[1]);
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} else {
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throw new Exception('MimeMailParser::setPath() or MimeMailParser::setText() must be called before retrieving email headers.');
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}
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return false;
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}
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/**
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* Retrieve the raw Email Headers
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* @return string
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*/
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public function getHeadersRaw() {
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if (isset($this->parts[1])) {
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return $this->getPartHeaderRaw($this->parts[1]);
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} else {
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throw new Exception('MimeMailParser::setPath() or MimeMailParser::setText() must be called before retrieving email headers.');
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}
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return false;
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}
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/**
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* Retrieve a specific Email Header
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* @return String
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* @param $name String Header name
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*/
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public function getHeader($name) {
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if (isset($this->parts[1])) {
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$headers = $this->getPartHeaders($this->parts[1]);
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if (isset($headers[$name])) {
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return $headers[$name];
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}
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} else {
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throw new Exception('MimeMailParser::setPath() or MimeMailParser::setText() must be called before retrieving email headers.');
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}
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return false;
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}
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/**
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* Returns the email message body in the specified format
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* @return Mixed String Body or False if not found
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* @param $type Object[optional]
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*/
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public function getMessageBody($type = 'text') {
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// NOTE: This function has been modified for Phabricator. The default
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// implementation returns the last matching part, which throws away text
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// for many emails. Instead, we concatenate all matching parts. See
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// issue 22 for discussion:
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// http://code.google.com/p/php-mime-mail-parser/issues/detail?id=22
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$body = false;
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$mime_types = array(
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'text'=> 'text/plain',
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'html'=> 'text/html'
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);
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if (in_array($type, array_keys($mime_types))) {
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foreach($this->parts as $part) {
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$disposition = $this->getPartContentDisposition($part);
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if ($disposition == 'attachment') {
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// text/plain parts with "Content-Disposition: attachment" are
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// attachments, not part of the text body.
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continue;
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}
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if ($this->getPartContentType($part) == $mime_types[$type]) {
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$headers = $this->getPartHeaders($part);
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// Concatenate all the matching parts into the body text. For example,
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// if a user sends a message with some text, then an image, and then
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// some more text, the text body of the email gets split over several
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// attachments.
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$body .= $this->decode(
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$this->getPartBody($part),
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array_key_exists('content-transfer-encoding', $headers)
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? $headers['content-transfer-encoding']
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: '');
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}
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}
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} else {
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throw new Exception('Invalid type specified for MimeMailParser::getMessageBody. "type" can either be text or html.');
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}
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return $body;
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}
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/**
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* get the headers for the message body part.
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* @return Array
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* @param $type Object[optional]
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*/
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public function getMessageBodyHeaders($type = 'text') {
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$headers = false;
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$mime_types = array(
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'text'=> 'text/plain',
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'html'=> 'text/html'
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);
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if (in_array($type, array_keys($mime_types))) {
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foreach($this->parts as $part) {
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if ($this->getPartContentType($part) == $mime_types[$type]) {
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$headers = $this->getPartHeaders($part);
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}
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}
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} else {
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throw new Exception('Invalid type specified for MimeMailParser::getMessageBody. "type" can either be text or html.');
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}
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return $headers;
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}
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/**
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* Returns the attachments contents in order of appearance
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* @return Array
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* @param $type Object[optional]
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*/
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public function getAttachments() {
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$attachments = array();
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$dispositions = array("attachment","inline");
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foreach($this->parts as $part) {
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$disposition = $this->getPartContentDisposition($part);
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if (in_array($disposition, $dispositions)) {
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$attachments[] = new MimeMailParser_attachment(
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$part['disposition-filename'],
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$this->getPartContentType($part),
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$this->getAttachmentStream($part),
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$disposition,
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$this->getPartHeaders($part)
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);
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}
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}
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return $attachments;
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}
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/**
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* Return the Headers for a MIME part
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* @return Array
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* @param $part Array
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*/
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private function getPartHeaders($part) {
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if (isset($part['headers'])) {
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return $part['headers'];
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}
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return false;
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}
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/**
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* Return a Specific Header for a MIME part
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* @return Array
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* @param $part Array
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* @param $header String Header Name
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*/
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private function getPartHeader($part, $header) {
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if (isset($part['headers'][$header])) {
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return $part['headers'][$header];
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}
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return false;
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}
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/**
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* Return the ContentType of the MIME part
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* @return String
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* @param $part Array
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*/
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private function getPartContentType($part) {
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if (isset($part['content-type'])) {
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return $part['content-type'];
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}
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return false;
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}
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/**
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* Return the Content Disposition
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* @return String
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* @param $part Array
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*/
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private function getPartContentDisposition($part) {
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if (isset($part['content-disposition'])) {
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return $part['content-disposition'];
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}
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return false;
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}
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/**
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* Retrieve the raw Header of a MIME part
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* @return String
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* @param $part Object
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*/
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private function getPartHeaderRaw(&$part) {
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$header = '';
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if ($this->stream) {
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$header = $this->getPartHeaderFromFile($part);
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} else if ($this->data) {
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$header = $this->getPartHeaderFromText($part);
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} else {
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throw new Exception('MimeMailParser::setPath() or MimeMailParser::setText() must be called before retrieving email parts.');
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}
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return $header;
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}
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/**
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* Retrieve the Body of a MIME part
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* @return String
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* @param $part Object
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*/
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private function getPartBody(&$part) {
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$body = '';
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if ($this->stream) {
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$body = $this->getPartBodyFromFile($part);
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} else if ($this->data) {
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$body = $this->getPartBodyFromText($part);
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} else {
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throw new Exception('MimeMailParser::setPath() or MimeMailParser::setText() must be called before retrieving email parts.');
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}
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return $body;
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}
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/**
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* Retrieve the Header from a MIME part from file
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* @return String Mime Header Part
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* @param $part Array
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*/
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private function getPartHeaderFromFile(&$part) {
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$start = $part['starting-pos'];
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$end = $part['starting-pos-body'];
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fseek($this->stream, $start, SEEK_SET);
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$header = fread($this->stream, $end-$start);
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return $header;
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}
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/**
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* Retrieve the Body from a MIME part from file
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* @return String Mime Body Part
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* @param $part Array
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*/
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private function getPartBodyFromFile(&$part) {
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$start = $part['starting-pos-body'];
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$end = $part['ending-pos-body'];
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fseek($this->stream, $start, SEEK_SET);
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$body = fread($this->stream, $end-$start);
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return $body;
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}
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/**
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* Retrieve the Header from a MIME part from text
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* @return String Mime Header Part
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* @param $part Array
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*/
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private function getPartHeaderFromText(&$part) {
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$start = $part['starting-pos'];
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$end = $part['starting-pos-body'];
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$header = substr($this->data, $start, $end-$start);
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return $header;
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}
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/**
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* Retrieve the Body from a MIME part from text
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* @return String Mime Body Part
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* @param $part Array
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*/
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private function getPartBodyFromText(&$part) {
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$start = $part['starting-pos-body'];
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$end = $part['ending-pos-body'];
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$body = substr($this->data, $start, $end-$start);
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return $body;
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}
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/**
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* Read the attachment Body and save temporary file resource
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* @return String Mime Body Part
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* @param $part Array
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*/
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private function getAttachmentStream(&$part) {
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$temp_fp = tmpfile();
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array_key_exists('content-transfer-encoding', $part['headers']) ? $encoding = $part['headers']['content-transfer-encoding'] : $encoding = '';
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if ($temp_fp) {
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if ($this->stream) {
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$start = $part['starting-pos-body'];
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$end = $part['ending-pos-body'];
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fseek($this->stream, $start, SEEK_SET);
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$len = $end-$start;
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$written = 0;
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$write = 2028;
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$body = '';
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while($written < $len) {
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if (($written+$write < $len )) {
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$write = $len - $written;
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}
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$part = fread($this->stream, $write);
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fwrite($temp_fp, $this->decode($part, $encoding));
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$written += $write;
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}
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} else if ($this->data) {
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$attachment = $this->decode($this->getPartBodyFromText($part), $encoding);
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fwrite($temp_fp, $attachment, strlen($attachment));
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}
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fseek($temp_fp, 0, SEEK_SET);
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} else {
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throw new Exception('Could not create temporary files for attachments. Your tmp directory may be unwritable by PHP.');
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return false;
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}
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return $temp_fp;
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}
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/**
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* Decode the string depending on encoding type.
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* @return String the decoded string.
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* @param $encodedString The string in its original encoded state.
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* @param $encodingType The encoding type from the Content-Transfer-Encoding header of the part.
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*/
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private function decode($encodedString, $encodingType) {
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if (strtolower($encodingType) == 'base64') {
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return base64_decode($encodedString);
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} else if (strtolower($encodingType) == 'quoted-printable') {
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return quoted_printable_decode($encodedString);
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} else {
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return $encodedString;
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}
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}
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}
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?>
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