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MimeMailParser.class.php
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Tue, Nov 26, 15:11

MimeMailParser.class.php
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<?php
require_once('attachment.class.php');
/**
* Fast Mime Mail parser Class using PHP's MailParse Extension
* @author gabe@fijiwebdesign.com
* @url http://www.fijiwebdesign.com/
* @license http://creativecommons.org/licenses/by-sa/3.0/us/
* @version $Id$
*/
class MimeMailParser {
/**
* PHP MimeParser Resource ID
*/
public $resource;
/**
* A file pointer to email
*/
public $stream;
/**
* A text of an email
*/
public $data;
/**
* Stream Resources for Attachments
*/
public $attachment_streams;
/**
* Inialize some stuff
* @return
*/
public function __construct() {
$this->attachment_streams = array();
}
/**
* Free the held resouces
* @return void
*/
public function __destruct() {
// clear the email file resource
if (is_resource($this->stream)) {
fclose($this->stream);
}
// clear the MailParse resource
if (is_resource($this->resource)) {
mailparse_msg_free($this->resource);
}
// remove attachment resources
foreach($this->attachment_streams as $stream) {
fclose($stream);
}
}
/**
* Set the file path we use to get the email text
* @return Object MimeMailParser Instance
* @param $mail_path Object
*/
public function setPath($path) {
// should parse message incrementally from file
$this->resource = mailparse_msg_parse_file($path);
$this->stream = fopen($path, 'r');
$this->parse();
return $this;
}
/**
* Set the Stream resource we use to get the email text
* @return Object MimeMailParser Instance
* @param $stream Resource
*/
public function setStream($stream) {
// streams have to be cached to file first
if (get_resource_type($stream) == 'stream') {
$tmp_fp = tmpfile();
if ($tmp_fp) {
while(!feof($stream)) {
fwrite($tmp_fp, fread($stream, 2028));
}
fseek($tmp_fp, 0);
$this->stream =& $tmp_fp;
} else {
throw new Exception('Could not create temporary files for attachments. Your tmp directory may be unwritable by PHP.');
return false;
}
fclose($stream);
} else {
$this->stream = $stream;
}
$this->resource = mailparse_msg_create();
// parses the message incrementally low memory usage but slower
while(!feof($this->stream)) {
mailparse_msg_parse($this->resource, fread($this->stream, 2082));
}
$this->parse();
return $this;
}
/**
* Set the email text
* @return Object MimeMailParser Instance
* @param $data String
*/
public function setText($data) {
// NOTE: This has been modified for Phabricator. If the input data does not
// end in a newline, Mailparse fails to include the last line in the mail
// body. This happens somewhere deep, deep inside the mailparse extension,
// so adding a newline here seems like the most straightforward fix.
if (!preg_match('/\n\z/', $data)) {
$data = $data."\n";
}
$this->resource = mailparse_msg_create();
// does not parse incrementally, fast memory hog might explode
mailparse_msg_parse($this->resource, $data);
$this->data = $data;
$this->parse();
return $this;
}
/**
* Parse the Message into parts
* @return void
* @private
*/
private function parse() {
$structure = mailparse_msg_get_structure($this->resource);
$this->parts = array();
foreach($structure as $part_id) {
$part = mailparse_msg_get_part($this->resource, $part_id);
$this->parts[$part_id] = mailparse_msg_get_part_data($part);
}
}
/**
* Retrieve the Email Headers
* @return Array
*/
public function getHeaders() {
if (isset($this->parts[1])) {
return $this->getPartHeaders($this->parts[1]);
} else {
throw new Exception('MimeMailParser::setPath() or MimeMailParser::setText() must be called before retrieving email headers.');
}
return false;
}
/**
* Retrieve the raw Email Headers
* @return string
*/
public function getHeadersRaw() {
if (isset($this->parts[1])) {
return $this->getPartHeaderRaw($this->parts[1]);
} else {
throw new Exception('MimeMailParser::setPath() or MimeMailParser::setText() must be called before retrieving email headers.');
}
return false;
}
/**
* Retrieve a specific Email Header
* @return String
* @param $name String Header name
*/
public function getHeader($name) {
if (isset($this->parts[1])) {
$headers = $this->getPartHeaders($this->parts[1]);
if (isset($headers[$name])) {
return $headers[$name];
}
} else {
throw new Exception('MimeMailParser::setPath() or MimeMailParser::setText() must be called before retrieving email headers.');
}
return false;
}
/**
* Returns the email message body in the specified format
* @return Mixed String Body or False if not found
* @param $type Object[optional]
*/
public function getMessageBody($type = 'text') {
// NOTE: This function has been modified for Phabricator. The default
// implementation returns the last matching part, which throws away text
// for many emails. Instead, we concatenate all matching parts. See
// issue 22 for discussion:
// http://code.google.com/p/php-mime-mail-parser/issues/detail?id=22
$body = false;
$mime_types = array(
'text'=> 'text/plain',
'html'=> 'text/html'
);
if (in_array($type, array_keys($mime_types))) {
foreach($this->parts as $part) {
$disposition = $this->getPartContentDisposition($part);
if ($disposition == 'attachment') {
// text/plain parts with "Content-Disposition: attachment" are
// attachments, not part of the text body.
continue;
}
if ($this->getPartContentType($part) == $mime_types[$type]) {
$headers = $this->getPartHeaders($part);
// Concatenate all the matching parts into the body text. For example,
// if a user sends a message with some text, then an image, and then
// some more text, the text body of the email gets split over several
// attachments.
$body .= $this->decode(
$this->getPartBody($part),
array_key_exists('content-transfer-encoding', $headers)
? $headers['content-transfer-encoding']
: '');
}
}
} else {
throw new Exception('Invalid type specified for MimeMailParser::getMessageBody. "type" can either be text or html.');
}
return $body;
}
/**
* get the headers for the message body part.
* @return Array
* @param $type Object[optional]
*/
public function getMessageBodyHeaders($type = 'text') {
$headers = false;
$mime_types = array(
'text'=> 'text/plain',
'html'=> 'text/html'
);
if (in_array($type, array_keys($mime_types))) {
foreach($this->parts as $part) {
if ($this->getPartContentType($part) == $mime_types[$type]) {
$headers = $this->getPartHeaders($part);
}
}
} else {
throw new Exception('Invalid type specified for MimeMailParser::getMessageBody. "type" can either be text or html.');
}
return $headers;
}
/**
* Returns the attachments contents in order of appearance
* @return Array
* @param $type Object[optional]
*/
public function getAttachments() {
// NOTE: This has been modified for Phabricator. Some mail clients do not
// send attachments with "Content-Disposition" headers.
$attachments = array();
$dispositions = array("attachment","inline");
$non_attachment_types = array("text/plain", "text/html");
$nonameIter = 0;
foreach ($this->parts as $part) {
$disposition = $this->getPartContentDisposition($part);
$filename = 'noname';
if (isset($part['disposition-filename'])) {
$filename = $part['disposition-filename'];
} elseif (isset($part['content-name'])) {
// if we have no disposition but we have a content-name, it's a valid attachment.
// we simulate the presence of an attachment disposition with a disposition filename
$filename = $part['content-name'];
$disposition = 'attachment';
} elseif (!in_array($part['content-type'], $non_attachment_types, true)
&& substr($part['content-type'], 0, 10) !== 'multipart/'
) {
// if we cannot get it with getMessageBody, we assume it is an attachment
$disposition = 'attachment';
}
if (in_array($disposition, $dispositions) && isset($filename) === true) {
if ($filename == 'noname') {
$nonameIter++;
$filename = 'noname'.$nonameIter;
}
$attachments[] = new MimeMailParser_attachment(
$filename,
$this->getPartContentType($part),
$this->getAttachmentStream($part),
$disposition,
$this->getPartHeaders($part)
);
}
}
return $attachments;
}
/**
* Return the Headers for a MIME part
* @return Array
* @param $part Array
*/
private function getPartHeaders($part) {
if (isset($part['headers'])) {
return $part['headers'];
}
return false;
}
/**
* Return a Specific Header for a MIME part
* @return Array
* @param $part Array
* @param $header String Header Name
*/
private function getPartHeader($part, $header) {
if (isset($part['headers'][$header])) {
return $part['headers'][$header];
}
return false;
}
/**
* Return the ContentType of the MIME part
* @return String
* @param $part Array
*/
private function getPartContentType($part) {
if (isset($part['content-type'])) {
return $part['content-type'];
}
return false;
}
/**
* Return the Content Disposition
* @return String
* @param $part Array
*/
private function getPartContentDisposition($part) {
if (isset($part['content-disposition'])) {
return $part['content-disposition'];
}
return false;
}
/**
* Retrieve the raw Header of a MIME part
* @return String
* @param $part Object
*/
private function getPartHeaderRaw(&$part) {
$header = '';
if ($this->stream) {
$header = $this->getPartHeaderFromFile($part);
} else if ($this->data) {
$header = $this->getPartHeaderFromText($part);
} else {
throw new Exception('MimeMailParser::setPath() or MimeMailParser::setText() must be called before retrieving email parts.');
}
return $header;
}
/**
* Retrieve the Body of a MIME part
* @return String
* @param $part Object
*/
private function getPartBody(&$part) {
$body = '';
if ($this->stream) {
$body = $this->getPartBodyFromFile($part);
} else if ($this->data) {
$body = $this->getPartBodyFromText($part);
} else {
throw new Exception('MimeMailParser::setPath() or MimeMailParser::setText() must be called before retrieving email parts.');
}
return $body;
}
/**
* Retrieve the Header from a MIME part from file
* @return String Mime Header Part
* @param $part Array
*/
private function getPartHeaderFromFile(&$part) {
$start = $part['starting-pos'];
$end = $part['starting-pos-body'];
fseek($this->stream, $start, SEEK_SET);
$header = fread($this->stream, $end-$start);
return $header;
}
/**
* Retrieve the Body from a MIME part from file
* @return String Mime Body Part
* @param $part Array
*/
private function getPartBodyFromFile(&$part) {
$start = $part['starting-pos-body'];
$end = $part['ending-pos-body'];
fseek($this->stream, $start, SEEK_SET);
$body = fread($this->stream, $end-$start);
return $body;
}
/**
* Retrieve the Header from a MIME part from text
* @return String Mime Header Part
* @param $part Array
*/
private function getPartHeaderFromText(&$part) {
$start = $part['starting-pos'];
$end = $part['starting-pos-body'];
$header = substr($this->data, $start, $end-$start);
return $header;
}
/**
* Retrieve the Body from a MIME part from text
* @return String Mime Body Part
* @param $part Array
*/
private function getPartBodyFromText(&$part) {
$start = $part['starting-pos-body'];
$end = $part['ending-pos-body'];
$body = substr($this->data, $start, $end-$start);
return $body;
}
/**
* Read the attachment Body and save temporary file resource
* @return String Mime Body Part
* @param $part Array
*/
private function getAttachmentStream(&$part) {
$temp_fp = tmpfile();
array_key_exists('content-transfer-encoding', $part['headers']) ? $encoding = $part['headers']['content-transfer-encoding'] : $encoding = '';
if ($temp_fp) {
if ($this->stream) {
$start = $part['starting-pos-body'];
$end = $part['ending-pos-body'];
fseek($this->stream, $start, SEEK_SET);
$len = $end-$start;
$written = 0;
$write = 2028;
$body = '';
while($written < $len) {
if (($written+$write < $len )) {
$write = $len - $written;
}
$part = fread($this->stream, $write);
fwrite($temp_fp, $this->decode($part, $encoding));
$written += $write;
}
} else if ($this->data) {
$attachment = $this->decode($this->getPartBodyFromText($part), $encoding);
fwrite($temp_fp, $attachment, strlen($attachment));
}
fseek($temp_fp, 0, SEEK_SET);
} else {
throw new Exception('Could not create temporary files for attachments. Your tmp directory may be unwritable by PHP.');
return false;
}
return $temp_fp;
}
/**
* Decode the string depending on encoding type.
* @return String the decoded string.
* @param $encodedString The string in its original encoded state.
* @param $encodingType The encoding type from the Content-Transfer-Encoding header of the part.
*/
private function decode($encodedString, $encodingType) {
if (strtolower($encodingType) == 'base64') {
return base64_decode($encodedString);
} else if (strtolower($encodingType) == 'quoted-printable') {
return quoted_printable_decode($encodedString);
} else {
return $encodedString;
}
}
}
?>

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