scripts/maildaemon.php

   1 #!/usr/bin/env php
   2 <?php
   3 /*
   4  * Laconica - a distributed open-source microblogging tool
   5  * Copyright (C) 2008, Controlez-Vous, Inc.
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 # Abort if called from a web server
  22 if (isset($_SERVER) && array_key_exists('REQUEST_METHOD', $_SERVER)) {
  23         print "This script must be run from the command line\n";
  24         exit();
  25 }
  26
  27 define('INSTALLDIR', realpath(dirname(__FILE__) . '/..'));
  28 define('LACONICA', true);
  29
  30 require_once(INSTALLDIR . '/lib/common.php');
  31 require_once(INSTALLDIR . '/lib/mail.php');
  32 require_once('Mail/mimeDecode.php');
  33
  34 # FIXME: we use both Mail_mimeDecode and mailparse
  35 # Need to move everything to mailparse
  36
  37 class MailerDaemon {
  38
  39         function __construct() {
  40         }
  41
  42         function handle_message($fname='php://stdin') {
  43                 list($from, $to, $msg) = $this->parse_message($fname);
  44                 if (!$from || !$to || !$msg) {
  45                         $this->error(NULL, _t('Could not parse message.'));
  46                 }
  47                 common_log(LOG_INFO, "Mail from $from to $to: " .substr($msg, 0, 20));
  48                 $user = $this->user_from($from);
  49                 if (!$user) {
  50                         $this->error($from, _('Not a registered user.'));
  51                         return false;
  52                 }
  53                 if (!$this->user_match_to($user, $to)) {
  54                         $this->error($from, _('Sorry, that is not your incoming email address.'));
  55                         return false;
  56                 }
  57                 if (!$user->emailpost) {
  58                         $this->error($from, _('Sorry, no incoming email allowed.'));
  59                         return false;
  60                 }
  61                 $response = $this->handle_command($user, $from, $msg);
  62                 if ($response) {
  63                         return true;
  64                 }
  65                 $msg = $this->cleanup_msg($msg);
  66                 $this->add_notice($user, $msg);
  67         }
  68
  69         function error($from, $msg) {
  70                 file_put_contents("php://stderr", $msg . "\n");
  71                 exit(1);
  72         }
  73
  74         function user_from($from_hdr) {
  75                 $froms = mailparse_rfc822_parse_addresses($from_hdr);
  76                 if (!$froms) {
  77                         return NULL;
  78                 }
  79                 $from = $froms[0];
  80                 $addr = common_canonical_email($from['address']);
  81                 $user = User::staticGet('email', $addr);
  82                 if (!$user) {
  83                         $user = User::staticGet('smsemail', $addr);
  84                 }
  85                 return $user;
  86         }
  87
  88         function user_match_to($user, $to_hdr) {
  89                 $incoming = $user->incomingemail;
  90                 $tos = mailparse_rfc822_parse_addresses($to_hdr);
  91                 foreach ($tos as $to) {
  92                         if (strcasecmp($incoming, $to['address']) == 0) {
  93                                 return true;
  94                         }
  95                 }
  96                 return false;
  97         }
  98
  99         function handle_command($user, $from, $msg) {
 100                 $inter = new CommandInterpreter();
 101                 $cmd = $inter->handle_command($user, $msg);
 102                 if ($cmd) {
 103                         $cmd->execute(new MailChannel($from));
 104                         return true;
 105                 }
 106                 return false;
 107         }
 108
 109         function respond($from, $to, $response) {
 110
 111                 $headers['From'] = $to;
 112                 $headers['To'] = $from;
 113                 $headers['Subject'] = "Command complete";
 114
 115                 return mail_send(array($from), $headers, $response);
 116         }
 117
 118         function log($level, $msg) {
 119                 common_log($level, 'MailDaemon: '.$msg);
 120         }
 121
 122         function add_notice($user, $msg) {
 123                 $notice = Notice::saveNew($user->id, $msg, 'mail');
 124                 if (is_string($notice)) {
 125                         $this->log(LOG_ERR, $notice);
 126                         return;
 127                 }
 128                 common_broadcast_notice($notice);
 129                 $this->log(LOG_INFO,
 130                                    'Added notice ' . $notice->id . ' from user ' . $user->nickname);
 131         }
 132
 133         function parse_message($fname) {
 134                 $contents = file_get_contents($fname);
 135                 $parsed = Mail_mimeDecode::decode(array('input' => $contents,
 136                                                                                                 'include_bodies' => true,
 137                                                                                                 'decode_headers' => true,
 138                                                                                                 'decode_bodies' => true));
 139                 if (!$parsed) {
 140                         return NULL;
 141                 }
 142
 143                 $from = $parsed->headers['from'];
 144
 145                 $to = $parsed->headers['to'];
 146
 147                 $type = $parsed->ctype_primary . '/' . $parsed->ctype_secondary;
 148
 149                 if ($parsed->ctype_primary == 'multipart') {
 150                         foreach ($parsed->parts as $part) {
 151                                 if ($part->ctype_primary == 'text' &&
 152                                         $part->ctype_secondary == 'plain') {
 153                                         $msg = $part->body;
 154                                         break;
 155                                 }
 156                         }
 157                 } else if ($type == 'text/plain') {
 158                         $msg = $parsed->body;
 159                 } else {
 160                         $this->unsupported_type($type);
 161                 }
 162
 163                 return array($from, $to, $msg);
 164         }
 165
 166         function unsupported_type($type) {
 167                 $this->error(NULL, "Unsupported message type: " . $type);
 168         }
 169
 170         function cleanup_msg($msg) {
 171                 $lines = explode("\n", $msg);
 172
 173                 $output = '';
 174
 175                 foreach ($lines as $line) {
 176                         // skip quotes
 177                         if (preg_match('/^\s*>.*$/', $line)) {
 178                                 continue;
 179                         }
 180                         // skip start of quote
 181                         if (preg_match('/^\s*On.*wrote:\s*$/', $line)) {
 182                                 continue;
 183                         }
 184                         // probably interesting to someone, not us
 185                         if (preg_match('/^\s*Sent via/', $line)) {
 186                                 continue;
 187                         }
 188                         // skip everything after a sig
 189                         if (preg_match('/^\s*--+\s*$/', $line) ||
 190                                 preg_match('/^\s*__+\s*$/', $line))
 191                         {
 192                                 break;
 193                         }
 194                         // skip everything after Outlook quote
 195                         if (preg_match('/^\s*-+\s*Original Message\s*-+\s*$/', $line)) {
 196                                 break;
 197                         }
 198                         // skip everything after weird forward
 199                         if (preg_match('/^\s*Begin\s+forward/', $line)) {
 200                                 break;
 201                         }
 202
 203                         $output .= ' ' . $line;
 204                 }
 205
 206                 preg_replace('/\s+/', ' ', $output);
 207                 return trim($output);
 208         }
 209 }
 210
 211 $md = new MailerDaemon();
 212 $md->handle_message('php://stdin');