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