gnu-social/lib/util/mailhandler.php
Alexei Sorokin 7fa4d56f05 Implement a class for automatic temporary file handling
And adopt it all over the code.
2021-07-16 19:44:41 +01:00

305 lines
9.7 KiB
PHP

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