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process_message.php
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process_message.php
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<?php
/**
* Copyright 2024 Grip Online
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/**
* Complaints message handling script.
* Set this script as process in .forward for the complaints-eating-user:
* "|/path/to/bin/php /path/to/process_message.php"
*
* @author Erik Hoogeboom
*/
require __DIR__ . DIRECTORY_SEPARATOR . 'vendor' . DIRECTORY_SEPARATOR . 'autoload.php';
$logFile = __DIR__ . DIRECTORY_SEPARATOR . 'complaints.log';
if (!is_file($logFile)) {
touch($logFile);
}
if (is_file($logFile)) {
$logger = new Log_file($logFile, 'ProcessMessage');
} else {
$logger = new Log_null('ProcessMessage');
}
$inputFile = null;
if (array_key_exists('argc', $_SERVER) && array_key_exists('argv', $_SERVER)) {
if ($_SERVER['argc'] > 1) {
$inputFile = $_SERVER['argv'][1];
}
}
$messageFileName = null;
$message = null;
if ($inputFile) {
if (file_exists($inputFile)) {
$messageFileName = basename($inputFile);
$message = file_get_contents($inputFile);
} else {
$logger->err('Input file not found: ' . $inputFile);
exit;
}
} else {
$messageFileName = date('YmdHis') . '-' . substr(md5(mt_rand()), 0, 7) . '.msg';
$message = file_get_contents('php://stdin');
}
$processedMessagesDir = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'messages' . DIRECTORY_SEPARATOR . 'processed' . DIRECTORY_SEPARATOR;
$unknownMessagesDir = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'messages' . DIRECTORY_SEPARATOR . 'unknown' . DIRECTORY_SEPARATOR;
$messageDir = null;
$decode = new Mail_mimeDecode($message);
$args = array('include_bodies' => true);
$decodedObj = $decode->decode($args);
$unsubscribeUrl = null;
$unsubscribeUrlPost = null;
$unsubscribeUrlMailto = null;
$checkHeaderGroups = array();
if ($decodedObj) {
if (isset($decodedObj->headers) && is_array($decodedObj->headers)) {
$checkHeaderGroups[] = $decodedObj->headers;
}
if (isset($decodedObj->parts) && is_array($decodedObj->parts)) {
$parts = $decodedObj->parts;
foreach ($parts as $part) {
if (isset($part->headers) && is_array($part->headers)) {
$checkHeaderGroups[] = $part->headers;
}
if (isset($part->parts) && is_array($part->parts)) {
foreach ($part->parts as $subPart) {
if (isset($subPart->headers) && is_array($subPart->headers)) {
$checkHeaderGroups[] = $subPart->headers;
}
}
}
}
}
} else {
$logger->err('Unable to decode message ' . $messageFileName);
$messageDir = $unknownMessagesDir;
}
foreach ($checkHeaderGroups as $headers) {
if (array_key_exists('list-unsubscribe', $headers)) {
$listUnsubscribeUrls = explode(',', $headers['list-unsubscribe']);
foreach ($listUnsubscribeUrls as $listUnsubscribeUrl) {
$listUnsubscribeUrl = trim($listUnsubscribeUrl);
if (substr($listUnsubscribeUrl, 0, 1) == '<') {
$listUnsubscribeUrl = substr($listUnsubscribeUrl, 1);
}
if (substr($listUnsubscribeUrl, -1) == '>') {
$listUnsubscribeUrl = substr($listUnsubscribeUrl, 0, -1);
}
if ($listUnsubscribeUrl != '') {
$parsedUrl = @parse_url($listUnsubscribeUrl);
if ($parsedUrl) {
if (array_key_exists('scheme', $parsedUrl)) {
if (($parsedUrl['scheme'] == 'http') || ($parsedUrl['scheme'] == 'https')) {
if (array_key_exists('list-unsubscribe-post', $headers) && ($headers['list-unsubscribe-post'] != '')) {
if (array_key_exists('query', $parsedUrl)) {
$queryParams = array();
parse_str($parsedUrl['query'], $queryParams);
if (array_key_exists('action', $queryParams) && array_key_exists('token', $queryParams)) {
$unsubscribeUrlPost = $listUnsubscribeUrl;
$unsubscribeUrl = $unsubscribeUrlPost;
break;
}
}
}
} else if ($parsedUrl['scheme'] == 'mailto') {
if (array_key_exists('path', $parsedUrl)) {
$email = $parsedUrl['path'];
if (strpos($email, '@') > 0) {
$userPart = substr($email, 0, strpos($email, '@'));
if (substr($userPart, 0, 12) == 'unsubscribe+') {
$siteParts = explode('-', substr($userPart, 12));
if (count($siteParts) >= 3) {
if (preg_match('/^[1-9]+[0-9]*$/', $siteParts[1])) {
$unsubscribeUrlMailto = $listUnsubscribeUrl;
}
}
}
}
}
}
}
}
}
}
}
if ($unsubscribeUrl !== null) {
break;
}
}
if ($unsubscribeUrl) {
$logger->info('Unsubsribing user via ' . $unsubscribeUrl . ' for message ' . $messageFileName);
$messageDir = $processedMessagesDir;
$opts = array('http' =>
array(
'ignore_errors' => true,
'method' => 'POST'
)
);
$context = stream_context_create($opts);
$http_response_header = null;
$result = @file_get_contents($unsubscribeUrl, false, $context);
$firstHeader = null;
$responseCode = null;
if (is_array($http_response_header) && (count($http_response_header) > 0)) {
$firstHeader = $http_response_header[0];
}
if ($firstHeader) {
$firstHeaderParts = explode(' ', $firstHeader);
if (count($firstHeaderParts) > 1) {
$responseCode = $firstHeaderParts[1];
}
if (($responseCode == '200') || ($responseCode == '201') || ($responseCode == '302')) {
// unsubscription succesful
$logger->info('Successful response for ' . $unsubscribeUrl . ': ' . $firstHeader);
} else {
$logger->warning('Unexpected response for ' . $unsubscribeUrl . ': ' . $firstHeader);
}
} else {
$logger->err('Could not call ' . $unsubscribeUrl);
}
} else if ($unsubscribeUrlMailto !== null) {
$logger->info('Unsubsribing user via ' . $unsubscribeUrlMailto . ' for message ' . $messageFileName);
$messageDir = $processedMessagesDir;
$parsedUrl = parse_url($unsubscribeUrlMailto);
$to = $parsedUrl['path'];
$query = $parsedUrl['query'];
$subject = 'unsubscribe';
if (array_key_exists('query', $parsedUrl) && ($parsedUrl['query'] != '')) {
$queryParams = array();
parse_str($parsedUrl['query'], $queryParams);
if (array_key_exists('subject', $queryParams)) {
$subject = $queryParams['subject'];
}
$res = @mail($to, $subject, '');
if ($res) {
$logger->info('Sent mail to ' . $to . ' for message ' . $messageFileName);
} else {
$logger->err('Could not send mail to ' . $to . ' for message ' . $messageFileName);
}
}
} else {
$logger->notice('Unable to determine unsubscribe url from message ' . $messageFileName);
$messageDir = $unknownMessagesDir;
}
if ($messageDir) {
if (!is_dir($messageDir)) {
mkdir($messageDir, 0755, true);
}
if (is_dir($messageDir)) {
$messageFile = $messageDir . $messageFileName;
file_put_contents($messageFile, $message);
}
}