mirror of
https://bitbucket.org/jsuto/piler.git
synced 2024-12-26 09:20:13 +01:00
308 lines
7.9 KiB
PHP
308 lines
7.9 KiB
PHP
<?php
|
|
|
|
|
|
class Piler_Mime_Decode {
|
|
const HEADER_FIELDS = ['from', 'to', 'cc', 'subject', 'date'];
|
|
|
|
|
|
public static function parseMessage($message, &$result) {
|
|
|
|
self::splitMessage($message, $headers, $body);
|
|
|
|
$boundary = self::getBoundary($headers);
|
|
|
|
// No boundary defined
|
|
|
|
if($boundary == '') {
|
|
if($headers['content-type']['type'] == "message/rfc822") {
|
|
self::parseMessage($body, $result);
|
|
}
|
|
else {
|
|
$result[] = array(
|
|
'headers' => $headers,
|
|
'body' => $body
|
|
);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
$parts = self::splitMime($body, $boundary);
|
|
|
|
for($i=0; $i<count($parts); $i++) {
|
|
|
|
self::splitMessage($parts[$i], $headers, $body);
|
|
|
|
$boundary = self::getBoundary($headers);
|
|
if($boundary) {
|
|
self::parseMessage($parts[$i], $result);
|
|
}
|
|
else {
|
|
if(in_array($headers['content-type']['type'], ["text/plain", "text/html"])) {
|
|
$result[] = array('headers' => $headers, 'body' => $body);
|
|
}
|
|
else if($headers['content-type']['type'] == "message/rfc822") {
|
|
self::parseMessage($body, $result);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
public static function splitMime($body, $boundary) {
|
|
$start = 0;
|
|
$res = array();
|
|
|
|
$body = self::remove_LF($body);
|
|
|
|
// Extract the mime parts excluding the boundary itself
|
|
|
|
$p = strpos($body, '--' . $boundary . "\n", $start);
|
|
if($p === false) {
|
|
// no parts found!
|
|
return array();
|
|
}
|
|
|
|
// Position after first boundary line
|
|
|
|
$start = $p + 3 + strlen($boundary);
|
|
|
|
while(($p = strpos($body, '--' . $boundary . "\n", $start)) !== false) {
|
|
$res[] = substr($body, $start, $p-$start);
|
|
$start = $p + 3 + strlen($boundary);
|
|
}
|
|
|
|
// No more parts, find end boundary
|
|
|
|
$p = strpos($body, '--' . $boundary . '--', $start);
|
|
if($p === false) {
|
|
return array();
|
|
}
|
|
|
|
// The remaining part also needs to be parsed:
|
|
$res[] = substr($body, $start, $p - $start);
|
|
|
|
return $res;
|
|
}
|
|
|
|
|
|
public static function splitMessage($message, &$headers, &$body, $EOL = "\n") {
|
|
self::splitMessageRaw($message, $headers, $body);
|
|
$headers = self::splitHeaders($headers);
|
|
}
|
|
|
|
|
|
public static function splitMessageRaw($message, &$headers, &$body, $EOL = "\n") {
|
|
$headers = [];
|
|
$body = '';
|
|
|
|
$message = self::remove_LF($message);
|
|
|
|
// Find an empty line between headers and body, otherwise we got a header-only message
|
|
|
|
if(strpos($message, $EOL . $EOL)) {
|
|
list($headers, $body) = explode($EOL . $EOL, $message, 2);
|
|
}
|
|
else {
|
|
$headers = $message;
|
|
}
|
|
}
|
|
|
|
|
|
public static function splitHeaders($headers) {
|
|
$headers = self::headersToArray($headers);
|
|
|
|
// normalize header names
|
|
foreach ($headers as $name => $header) {
|
|
$lower = strtolower($name);
|
|
if($lower == $name) {
|
|
continue;
|
|
}
|
|
|
|
unset($headers[$name]);
|
|
|
|
if(!isset($headers[$lower])) {
|
|
$headers[$lower] = $header;
|
|
continue;
|
|
}
|
|
|
|
if(is_array($headers[$lower])) {
|
|
$headers[$lower][] = $header;
|
|
continue;
|
|
}
|
|
|
|
$headers[$lower] = array($headers[$lower], $header);
|
|
}
|
|
|
|
// Add some default values, if they are missing
|
|
|
|
if(!isset($headers['content-type'])) { $headers['content-type'] = 'text/plain'; }
|
|
|
|
// I saw a dumb email (it was a spam, though) having two Date: lines.
|
|
// In this case we take the first date, and discard the rest
|
|
if(is_array($headers[self::HEADER_FIELDS[4]])) { $headers[self::HEADER_FIELDS[4]] = $headers[self::HEADER_FIELDS[4]][0]; }
|
|
|
|
for($i=0; $i<count(self::HEADER_FIELDS); $i++) {
|
|
if(!isset($headers[self::HEADER_FIELDS[$i]])) { $headers[self::HEADER_FIELDS[$i]] = ''; }
|
|
|
|
$headers[self::HEADER_FIELDS[$i]] = iconv_mime_decode($headers[self::HEADER_FIELDS[$i]], ICONV_MIME_DECODE_CONTINUE_ON_ERROR);
|
|
}
|
|
|
|
$headers['content-type'] = self::splitContentType($headers['content-type']);
|
|
|
|
$headers['content-type']['type'] = strtolower($headers['content-type']['type']);
|
|
|
|
return $headers;
|
|
}
|
|
|
|
|
|
public static function headersToArray($headers = '') {
|
|
$token = '';
|
|
$last_token = '';
|
|
$result = array();
|
|
|
|
$headers = explode("\n", $headers);
|
|
|
|
foreach($headers as $h) {
|
|
|
|
// Handle cases when there's no whitespace between the header key and value
|
|
// eg. Subject:som
|
|
|
|
$h = preg_replace("/^([\S]+):(\S)/", '${1}: ${2}', $h);
|
|
$h = preg_replace("/\s{1,}/", " ", $h);
|
|
|
|
$line = preg_split("/\s/", $h);
|
|
|
|
// Skip line if it doesn't have a colon (:) and the 1st character is not a whitespace
|
|
|
|
if(!ctype_space($h[0]) && !strchr($h, ':')) { continue; }
|
|
|
|
if($line) {
|
|
if(substr($line[0], -1) == ':') {
|
|
$token = array_shift($line);
|
|
$token = rtrim($token, ':');
|
|
|
|
$last_token = $token;
|
|
}
|
|
else {
|
|
$token = '';
|
|
}
|
|
|
|
$line_str = implode(" ", $line);
|
|
|
|
if(!isset($result[$last_token])) {
|
|
$result[$last_token] = $line_str;
|
|
}
|
|
else {
|
|
if($token) {
|
|
$result[$last_token] .= "\n";
|
|
}
|
|
|
|
$result[$last_token] .= ' ' . $line_str;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
while(list($k, $v) = each($result)) {
|
|
if(strchr($v, "\n")) {
|
|
$result[$k] = explode("\n", $v);
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
|
|
public static function splitContentType($field = '') {
|
|
$split = array();
|
|
$what = 'type';
|
|
|
|
$field = $what . '=' . $field;
|
|
if(!preg_match_all('%([^=\s]+)\s*=\s*("[^"]+"|[^;]+)(;\s*|$)%', $field, $matches)) {
|
|
return $split;
|
|
}
|
|
|
|
$split = array();
|
|
foreach ($matches[1] as $key => $name) {
|
|
$name = strtolower($name);
|
|
if($matches[2][$key][0] == '"') {
|
|
$split[$name] = substr($matches[2][$key], 1, -1);
|
|
} else {
|
|
$split[$name] = $matches[2][$key];
|
|
}
|
|
}
|
|
|
|
return $split;
|
|
}
|
|
|
|
|
|
public static function remove_LF($message = '') {
|
|
return str_replace("\r", "", $message);
|
|
//return preg_replace("/\r/", "", $message);
|
|
}
|
|
|
|
|
|
public static function getBoundary($headers = array()) {
|
|
if(isset($headers['content-type']['boundary'])) {
|
|
return $headers['content-type']['boundary'];
|
|
}
|
|
|
|
return '';
|
|
}
|
|
|
|
|
|
public static function fixMimeBodyPart($headers = array(), $body = '') {
|
|
|
|
if(isset($headers['content-transfer-encoding'])) {
|
|
if($headers['content-transfer-encoding'] == 'quoted-printable') {
|
|
$body = quoted_printable_decode($body);
|
|
}
|
|
|
|
if($headers['content-transfer-encoding'] == 'base64') {
|
|
$body = base64_decode($body);
|
|
}
|
|
}
|
|
|
|
if(isset($headers['content-type']['charset'])) {
|
|
$body = iconv($headers['content-type']['charset'], 'utf-8' . '//IGNORE', $body);
|
|
}
|
|
|
|
if(strtolower($headers['content-type']['type']) == 'text/plain') {
|
|
$body = self::escape_lt_gt_symbols($body);
|
|
$body = preg_replace("/\n/", "<br />\n", $body);
|
|
$body = "\n" . self::printNicely($body);
|
|
}
|
|
|
|
return $body;
|
|
}
|
|
|
|
|
|
public static function escape_lt_gt_symbols($s = '') {
|
|
$s = preg_replace("/</", "<", $s);
|
|
$s = preg_replace("/>/", ">", $s);
|
|
|
|
return $s;
|
|
}
|
|
|
|
|
|
public static function printNicely($s = '') {
|
|
$k = 0;
|
|
$nice = "";
|
|
|
|
$x = explode(" ", $s);
|
|
|
|
for($i=0; $i<count($x); $i++){
|
|
$nice .= $x[$i] . " ";
|
|
$k += strlen($x[$i]);
|
|
|
|
if(strstr($x[$i], "\n")){ $k = 0; }
|
|
|
|
if($k > 70){ $nice .= "\n"; $k = 0; }
|
|
}
|
|
|
|
return $nice;
|
|
}
|
|
|
|
}
|