305 lines
9.7 KiB
PHP
305 lines
9.7 KiB
PHP
<?php
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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/*
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* @copyright 2008, 2009 StatusNet, Inc.
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* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
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*/
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defined('GNUSOCIAL') || die();
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require_once INSTALLDIR . '/lib/util/tempfile.php';
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require_once INSTALLDIR . '/lib/util/mail.php';
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require_once 'Mail/mimeDecode.php';
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// @todo FIXME: we use both Mail_mimeDecode and mailparse
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// Need to move everything to mailparse
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class MailHandler
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{
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public function __construct()
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{
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}
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public function handle_message($rawmessage)
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{
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list($from, $to, $msg, $attachments) = $this->parse_message($rawmessage);
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if (!$from || !$to || !$msg) {
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// TRANS: Error message in incoming mail handler used when an incoming e-mail cannot be processed.
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$this->error(null, _('Could not parse message.'));
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}
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common_log(LOG_INFO, "Mail from $from to $to with ".count($attachments) .' attachment(s): ' .substr($msg, 0, 20));
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$user = $this->user_from_header($from);
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if (!$user) {
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// TRANS: Error message in incoming mail handler used when an incoming e-mail is not from a registered user.
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$this->error($from, _('Not a registered user.'));
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return false;
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}
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if (!$this->user_match_to($user, $to)) {
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// TRANS: Error message in incoming mail handler used when an incoming e-mail is not from a user's incoming e-mail address.
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$this->error($from, _('Sorry, that is not your incoming email address.'));
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return false;
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}
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if (!$user->emailpost) {
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// TRANS: Error message in incoming mail handler used when no incoming e-mail is allowed.
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$this->error($from, _('Sorry, no incoming email allowed.'));
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return false;
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}
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$response = $this->handle_command($user, $from, $msg);
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if ($response) {
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return true;
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}
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$msg = $this->cleanup_msg($msg);
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$msg = $user->shortenLinks($msg);
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if (Notice::contentTooLong($msg)) {
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// TRANS: Error message in incoming mail handler used when an incoming e-mail contains too many characters.
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$this->error($from, sprintf(
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_m('That\'s too long. Maximum notice size is %d character.',
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'That\'s too long. Maximum notice size is %d characters.',
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Notice::maxContent()),
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Notice::maxContent()
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));
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}
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$mediafiles = array();
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foreach ($attachments as $attachment) {
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$mf = null;
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try {
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$mf = MediaFile::fromFileInfo($attachment, $user->getProfile());
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} catch (ClientException $ce) {
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$this->error($from, $ce->getMessage());
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}
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$msg .= ' ' . $mf->shortUrl();
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array_push($mediafiles, $mf);
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fclose($attachment);
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}
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$err = $this->add_notice($user, $msg, $mediafiles);
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if (is_string($err)) {
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$this->error($from, $err);
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return false;
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} else {
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return true;
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}
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}
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public function error($from, $msg)
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{
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file_put_contents("php://stderr", $msg . "\n");
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exit(1);
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}
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public function user_from_header($from_hdr)
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{
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$froms = mailparse_rfc822_parse_addresses($from_hdr);
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if (!$froms) {
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return null;
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}
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$from = $froms[0];
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$addr = common_canonical_email($from['address']);
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$user = User::getKV('email', $addr);
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if (!$user) {
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$user = User::getKV('smsemail', $addr);
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}
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return $user;
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}
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public function user_match_to($user, $to_hdr)
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{
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$incoming = $user->incomingemail;
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$tos = mailparse_rfc822_parse_addresses($to_hdr);
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foreach ($tos as $to) {
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if (strcasecmp($incoming, $to['address']) == 0) {
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return true;
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}
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}
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return false;
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}
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public function handle_command($user, $from, $msg)
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{
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$inter = new CommandInterpreter();
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$cmd = $inter->handle_command($user, $msg);
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if ($cmd) {
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$cmd->execute(new MailChannel($from));
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return true;
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}
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return false;
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}
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public function respond($from, $to, $response)
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{
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$headers['From'] = $to;
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$headers['To'] = $from;
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// TRANS: E-mail subject for reply to an e-mail command.
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$headers['Subject'] = _('Command complete');
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return mail_send(array($from), $headers, $response);
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}
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public function log($level, $msg)
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{
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common_log($level, 'MailDaemon: '.$msg);
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}
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public function add_notice($user, $msg, $mediafiles)
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{
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try {
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$notice = Notice::saveNew($user->id, $msg, 'mail');
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} catch (Exception $e) {
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$this->log(LOG_ERR, $e->getMessage());
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return $e->getMessage();
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}
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foreach ($mediafiles as $mf) {
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$mf->attachToNotice($notice);
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}
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$this->log(
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LOG_INFO,
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"Added notice {$notice->id} from user {$user->nickname}"
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);
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return true;
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}
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public function parse_message($contents)
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{
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$parsed = Mail_mimeDecode::decode([
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'input' => $contents,
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'include_bodies' => true,
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'decode_headers' => true,
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'decode_bodies' => true,
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]);
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if (!$parsed) {
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return null;
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}
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$from = $parsed->headers['from'];
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$to = $parsed->headers['to'];
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$type = $parsed->ctype_primary . '/' . $parsed->ctype_secondary;
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$attachments = array();
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$this->extract_part($parsed, $msg, $attachments);
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return array($from, $to, $msg, $attachments);
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}
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public function extract_part($parsed, &$msg, &$attachments)
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{
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if ($parsed->ctype_primary === 'multipart') {
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if ($parsed->ctype_secondary === 'alternative') {
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$altmsg = $this->extract_msg_from_multipart_alternative_part($parsed);
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if (!empty($altmsg)) {
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$msg = $altmsg;
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}
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} else {
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foreach ($parsed->parts as $part) {
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$this->extract_part($part, $msg, $attachments);
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}
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}
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} elseif (
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$parsed->ctype_primary === 'text'
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&& $parsed->ctype_secondary === 'plain'
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) {
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$msg = $parsed->body;
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if (strtolower($parsed->ctype_parameters['charset']) !== 'utf-8') {
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$msg = utf8_encode($msg);
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}
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} elseif (!empty($parsed->body)) {
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if (common_config('attachments', 'uploads')) {
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// Only save attachments if uploads are enabled
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$attachment = new TemporaryFile('gs-mailattach');
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fwrite($attachment->getResource(), $parsed->body);
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fflush($attachment->getResource());
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$attachments[] = $attachment;
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}
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}
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}
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public function extract_msg_from_multipart_alternative_part($parsed)
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{
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foreach ($parsed->parts as $part) {
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$this->extract_part($part, $msg, $attachments);
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}
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//we don't want any attachments that are a result of this parsing
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return $msg;
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}
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public function unsupported_type($type)
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{
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// TRANS: Error message in incoming mail handler used when an incoming e-mail is of an unsupported type.
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// TRANS: %s is the unsupported type.
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$this->error(null, sprintf(_('Unsupported message type: %s.'), $type));
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}
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public function cleanup_msg($msg)
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{
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$lines = explode("\n", $msg);
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$output = '';
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foreach ($lines as $line) {
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// skip quotes
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if (preg_match('/^\s*>.*$/', $line)) {
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continue;
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}
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// skip start of quote
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if (preg_match('/^\s*On.*wrote:\s*$/', $line)) {
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continue;
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}
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// probably interesting to someone, not us
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if (preg_match('/^\s*Sent via/', $line)) {
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continue;
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}
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if (preg_match('/^\s*Sent from my/', $line)) {
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continue;
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}
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// skip everything after a sig
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if (
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preg_match('/^\s*--+\s*$/', $line)
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|| preg_match('/^\s*__+\s*$/', $line)
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) {
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break;
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}
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// skip everything after Outlook quote
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if (preg_match('/^\s*-+\s*Original Message\s*-+\s*$/', $line)) {
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break;
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}
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// skip everything after weird forward
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if (preg_match('/^\s*Begin\s+forward/', $line)) {
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break;
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}
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// skip everything after a blank line if we already have content
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if ($output !== '' && $line === '') {
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break;
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}
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$output .= ' ' . $line;
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}
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preg_replace('/\s+/', ' ', $output);
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return trim($output);
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}
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}
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