267 lines
8.4 KiB
PHP
267 lines
8.4 KiB
PHP
<?php
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require_once __DIR__ . '/init.php';
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use Appwrite\Database\Pool\PDOPool;
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use Appwrite\Database\Pool\RedisPool;
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use Appwrite\Network\Validator\Origin;
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use Appwrite\Realtime\Realtime;
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use Appwrite\Utopia\Response;
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use Swoole\Process;
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use Swoole\Http\Request;
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use Swoole\Http\Response as SwooleResponse;
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use Swoole\WebSocket\Frame;
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use Swoole\WebSocket\Server;
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use Utopia\App;
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use Utopia\CLI\Console;
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use Utopia\Swoole\Request as SwooleRequest;
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use Utopia\Abuse\Abuse;
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use Utopia\Abuse\Adapters\TimeLimit;
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/**
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* TODO List
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*
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* - JWT Authentication (in path / or in message)
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*
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* Protocols Support:
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* - Websocket support: https://www.swoole.co.uk/docs/modules/swoole-websocket-server
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*/
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Swoole\Runtime::enableCoroutine(SWOOLE_HOOK_ALL);
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$server = new Server('0.0.0.0', 80, SWOOLE_PROCESS);
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$server->set([
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'package_max_length' => 64000 // Default maximum Package Size (64kb)
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]);
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$subscriptions = [];
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$connections = [];
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$register->set('dbPool', function () { // Register DB connection
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$dbHost = App::getEnv('_APP_DB_HOST', '');
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$dbUser = App::getEnv('_APP_DB_USER', '');
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$dbPass = App::getEnv('_APP_DB_PASS', '');
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$dbScheme = App::getEnv('_APP_DB_SCHEMA', '');
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$pool = new PDOPool(20, $dbHost, $dbScheme, $dbUser, $dbPass);
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return $pool;
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});
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$register->set('redisPool', function () {
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$user = App::getEnv('_APP_REDIS_USER', '');
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$pass = App::getEnv('_APP_REDIS_PASS', '');
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$auth = [];
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if ($user) {
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$auth[] = $user;
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}
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if ($pass) {
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$auth[] = $pass;
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}
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$pool = new RedisPool(20, App::getEnv('_APP_REDIS_HOST', ''), App::getEnv('_APP_REDIS_PORT', ''), $auth);
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return $pool;
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});
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$server->on('workerStart', function ($server, $workerId) use (&$subscriptions, &$connections, &$register) {
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Console::success('Worker ' . $workerId . ' started succefully');
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$attempts = 0;
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$start = time();
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$redisPool = $register->get('redisPool');
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while ($attempts < 300) {
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try {
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if ($attempts > 0) {
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Console::error('Pub/sub connection lost (lasted ' . (time() - $start) . ' seconds, worker: ' . $workerId . ').
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Attempting restart in 5 seconds (attempt #' . $attempts . ')');
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sleep(5); // 5 sec delay between connection attempts
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}
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/** @var Swoole\Coroutine\Redis $redis */
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$redis = $redisPool->get();
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if ($redis->ping(true)) {
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$attempts = 0;
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Console::success('Pub/sub connection established (worker: ' . $workerId . ')');
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} else {
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Console::error('Pub/sub failed (worker: ' . $workerId . ')');
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}
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$redis->subscribe(['realtime'], function ($redis, $channel, $payload) use ($server, &$connections, &$subscriptions) {
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/**
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* Supported Resources:
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* - Collection
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* - Document
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* - File
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* - Account
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* - Session
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* - Team? (not implemented yet)
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* - Membership? (not implemented yet)
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* - Function? (not available yet)
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* - Execution? (not available yet)
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*/
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$event = json_decode($payload, true);
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$receivers = Realtime::identifyReceivers($event, $subscriptions);
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foreach ($receivers as $receiver) {
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if ($server->exist($receiver) && $server->isEstablished($receiver)) {
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$server->push(
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$receiver,
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json_encode($event['data']),
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SWOOLE_WEBSOCKET_OPCODE_TEXT,
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SWOOLE_WEBSOCKET_FLAG_FIN | SWOOLE_WEBSOCKET_FLAG_COMPRESS
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);
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} else {
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$server->close($receiver);
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}
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}
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});
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} catch (\Throwable $th) {
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Console::error('Pub/sub error: ' . $th->getMessage());
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$redisPool->put($redis);
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$attempts++;
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continue;
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}
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$attempts++;
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}
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Console::error('Failed to restart pub/sub...');
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});
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$server->on('start', function (Server $server) {
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Console::success('Server started succefully');
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Console::info("Master pid {$server->master_pid}, manager pid {$server->manager_pid}");
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// listen ctrl + c
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Process::signal(2, function () use ($server) {
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Console::log('Stop by Ctrl+C');
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$server->shutdown();
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});
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});
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$server->on('open', function (Server $server, Request $request) use (&$connections, &$subscriptions, &$register) {
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$app = new App('UTC');
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$connection = $request->fd;
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$request = new SwooleRequest($request);
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$db = $register->get('dbPool')->get();
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$redis = $register->get('redisPool')->get();
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$register->set('db', function () use (&$db) {
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return $db;
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});
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$register->set('cache', function () use (&$redis) { // Register cache connection
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return $redis;
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});
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Console::info("Connection open (user: {$connection}, worker: {$server->getWorkerId()})");
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App::setResource('request', function () use ($request) {
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return $request;
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});
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App::setResource('response', function () {
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return new Response(new SwooleResponse());
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});
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try {
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/** @var Appwrite\Database\Document $user */
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$user = $app->getResource('user');
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/** @var Appwrite\Database\Document $project */
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$project = $app->getResource('project');
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/** @var Appwrite\Database\Document $console */
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$console = $app->getResource('console');
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/*
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* Project Check
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*/
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if (empty($project->getId())) {
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throw new Exception('Missing or unknown project ID', 1008);
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}
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/*
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* Abuse Check
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*
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* Abuse limits are connecting 128 times per minute and ip address.
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*/
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$timeLimit = new TimeLimit('url:{url},ip:{ip}', 128, 60, function () use ($db) {
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return $db;
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});
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$timeLimit
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->setNamespace('app_' . $project->getId())
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->setParam('{ip}', $request->getIP())
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->setParam('{url}', $request->getURI());
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$abuse = new Abuse($timeLimit);
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if ($abuse->check() && App::getEnv('_APP_OPTIONS_ABUSE', 'enabled') === 'enabled') {
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throw new Exception('Too many requests', 1013);
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}
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/*
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* Validate Client Domain - Check to avoid CSRF attack.
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* Adding Appwrite API domains to allow XDOMAIN communication.
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* Skip this check for non-web platforms which are not required to send an origin header.
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*/
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$origin = $request->getOrigin();
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$originValidator = new Origin(\array_merge($project->getAttribute('platforms', []), $console->getAttribute('platforms', [])));
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if (!$originValidator->isValid($origin)) {
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throw new Exception($originValidator->getDescription(), 1008);
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}
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Realtime::setUser($user);
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$roles = Realtime::getRoles();
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$channels = Realtime::parseChannels($request->getQuery('channels', []));
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/**
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* Channels Check
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*/
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if (empty($channels)) {
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throw new Exception('Missing channels', 1008);
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}
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Realtime::subscribe($project->getId(), $connection, $roles, $subscriptions, $connections, $channels);
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$server->push($connection, json_encode($channels));
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} catch (\Throwable $th) {
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$response = [
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'code' => $th->getCode(),
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'message' => $th->getMessage()
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];
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$server->push($connection, json_encode($response));
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$server->close($connection);
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}
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/**
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* Put used PDO and Redis Connections back into their pools.
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*/
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/** @var PDOPool $dbPool */
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$dbPool = $register->get('dbPool');
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$dbPool->put($db);
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/** @var RedisPool $redisPool */
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$redisPool = $register->get('redisPool');
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$redisPool->put($redis);
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});
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$server->on('message', function (Server $server, Frame $frame) {
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$server->push($frame->fd, 'Sending messages is not allowed.');
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$server->close($frame->fd);
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});
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$server->on('close', function (Server $server, int $connection) use (&$connections, &$subscriptions) {
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Realtime::unsubscribe($connection, $subscriptions, $connections);
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Console::info('Connection close: ' . $connection);
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});
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$server->start();
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