424 lines
15 KiB
PHP
424 lines
15 KiB
PHP
<?php
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namespace Appwrite\Realtime;
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use Appwrite\Database\Database;
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use Appwrite\Database\Adapter\MySQL as MySQLAdapter;
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use Appwrite\Database\Adapter\Redis as RedisAdapter;
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use Appwrite\Event\Event;
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use Appwrite\Network\Validator\Origin;
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use Appwrite\Utopia\Response;
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use Exception;
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use Swoole\Http\Request;
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use Swoole\Http\Response as SwooleResponse;
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use Swoole\Process;
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use Swoole\Table;
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use Swoole\Timer;
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use Swoole\WebSocket\Frame;
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use Swoole\WebSocket\Server as SwooleServer;
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use Utopia\Abuse\Abuse;
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use Utopia\Abuse\Adapters\TimeLimit;
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use Utopia\App;
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use Utopia\CLI\Console;
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use Utopia\Config\Config;
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use Utopia\Exception as UtopiaException;
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use Utopia\Registry\Registry;
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use Utopia\Swoole\Request as SwooleRequest;
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class Server
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{
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private Registry $register;
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private SwooleServer $server;
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private Table $stats;
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private array $subscriptions;
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private array $connections;
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public function __construct(Registry &$register, $host = '0.0.0.0', $port = 80, $config = [])
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{
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$this->subscriptions = [];
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$this->connections = [];
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$this->register = $register;
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$this->stats = new Table(4096, 1);
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$this->stats->column('projectId', Table::TYPE_STRING, 64);
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$this->stats->column('connections', Table::TYPE_INT);
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$this->stats->column('connectionsTotal', Table::TYPE_INT);
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$this->stats->column('messages', Table::TYPE_INT);
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$this->stats->create();
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$this->server = new SwooleServer($host, $port, SWOOLE_PROCESS);
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$this->server->set($config);
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$this->server->on('start', [$this, 'onStart']);
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$this->server->on('workerStart', [$this, 'onWorkerStart']);
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$this->server->on('open', [$this, 'onOpen']);
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$this->server->on('message', [$this, 'onMessage']);
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$this->server->on('close', [$this, 'onClose']);
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$this->server->start();
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}
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/**
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* This is executed when the Realtime server starts.
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* @param SwooleServer $server
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* @return void
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*/
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public function onStart(SwooleServer $server): void
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{
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Console::success('Server started succefully');
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Console::info("Master pid {$server->master_pid}, manager pid {$server->manager_pid}");
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Timer::tick(10000, function () {
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/** @var Table $stats */
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foreach ($this->stats as $projectId => $value) {
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if (empty($value['connections']) && empty($value['messages'])) {
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continue;
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}
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$connections = $value['connections'];
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$messages = $value['messages'];
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$usage = new Event('v1-usage', 'UsageV1');
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$usage
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->setParam('projectId', $projectId)
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->setParam('realtimeConnections', $connections)
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->setParam('realtimeMessages', $messages)
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->setParam('networkRequestSize', 0)
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->setParam('networkResponseSize', 0);
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$this->stats->set($projectId, [
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'projectId' => $projectId,
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'messages' => 0,
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'connections' => 0
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]);
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if (App::getEnv('_APP_USAGE_STATS', 'enabled') == 'enabled') {
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$usage->trigger();
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}
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}
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});
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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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/**
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* This is executed when a WebSocket worker process starts.
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* @param SwooleServer $server
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* @param int $workerId
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* @return void
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* @throws Exception
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*/
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public function onWorkerStart(SwooleServer $server, int $workerId): void
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{
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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 = $this->register->get('redisPool');
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/**
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* Sending current connections to project channels on the console project every 5 seconds.
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*/
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$server->tick(5000, function () use (&$server) {
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$this->tickSendProjectUsage($server);
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});
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while ($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, $workerId) {
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$this->onRedisPublish($payload, $server, $workerId);
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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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/**
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* This is executed when a new Realtime connection is established.
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* @param SwooleServer $server
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* @param Request $request
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* @return void
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* @throws Exception
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* @throws UtopiaException
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*/
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public function onOpen(SwooleServer $server, Request $request): void
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{
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$app = new App('UTC');
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$connection = $request->fd;
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$request = new SwooleRequest($request);
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$db = $this->register->get('dbPool')->get();
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$redis = $this->register->get('redisPool')->get();
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Console::info("Connection open (user: {$connection}, worker: {$server->getWorkerId()})");
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App::setResource('db', function () use (&$db) {
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return $db;
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});
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App::setResource('cache', function () use (&$redis) {
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return $redis;
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});
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App::setResource('request', function () use ($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) && $project->getId() !== 'console') {
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throw new Exception($originValidator->getDescription(), 1008);
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}
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Parser::setUser($user);
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$roles = Parser::getRoles();
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$channels = Parser::parseChannels($request->getQuery('channels', []));
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/**
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* Channels Check
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*/
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if (empty($channels)) {
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throw new Exception('Missing channels', 1008);
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}
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Parser::subscribe($project->getId(), $connection, $roles, $this->subscriptions, $this->connections, $channels);
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$server->push($connection, json_encode($channels));
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$this->stats->incr($project->getId(), 'connections');
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$this->stats->incr($project->getId(), 'connectionsTotal');
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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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// Temporarily print debug logs by default for Alpha testing.
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//if (App::isDevelopment()) {
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Console::error("[Error] Connection Error");
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Console::error("[Error] Code: " . $response['code']);
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Console::error("[Error] Message: " . $response['message']);
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//}
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$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 = $this->register->get('dbPool');
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$dbPool->put($db);
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/** @var RedisPool $redisPool */
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$redisPool = $this->register->get('redisPool');
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$redisPool->put($redis);
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}
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/**
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* This is executed when a message is received by the Realtime server.
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* @param SwooleServer $server
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* @param Frame $frame
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* @return void
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*/
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public function onMessage(SwooleServer $server, Frame $frame)
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{
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$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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/**
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* This is executed when a Realtime connection is closed.
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* @param SwooleServer $server
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* @param int $connection
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* @return void
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*/
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public function onClose(SwooleServer $server, int $connection)
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{
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if (array_key_exists($connection, $this->connections)) {
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$this->stats->decr($this->connections[$connection]['projectId'], 'connectionsTotal');
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}
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Parser::unsubscribe($connection, $this->subscriptions, $this->connections);
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Console::info('Connection close: ' . $connection);
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}
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/**
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* This is executed when an event is published on realtime channel in Redis.
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* @param string $payload
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* @param SwooleServer $server
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* @param int $workerId
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* @return void
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*/
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public function onRedisPublish(string $payload, SwooleServer &$server, int $workerId)
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{
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$event = json_decode($payload, true);
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if ($event['permissionsChanged'] && isset($event['userId'])) {
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$this->addPermission($event);
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}
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$receivers = Parser::identifyReceivers($event, $this->subscriptions);
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// Temporarily print debug logs by default for Alpha testing.
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// if (App::isDevelopment() && !empty($receivers)) {
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if (!empty($receivers)) {
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Console::log("[Debug][Worker {$workerId}] Receivers: " . count($receivers));
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Console::log("[Debug][Worker {$workerId}] Receivers Connection IDs: " . json_encode($receivers));
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Console::log("[Debug][Worker {$workerId}] Event: " . $payload);
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}
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foreach ($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($receiver);
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}
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}
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if (($num = count($receivers)) > 0) {
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$this->stats->incr($event['project'], 'messages', $num);
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}
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}
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/**
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* This sends the usage to the `console` channel.
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* @param SwooleServer $server
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* @return void
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*/
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public function tickSendProjectUsage(SwooleServer &$server)
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{
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if (
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array_key_exists('console', $this->subscriptions)
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&& array_key_exists('role:member', $this->subscriptions['console'])
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&& array_key_exists('project', $this->subscriptions['console']['role:member'])
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) {
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$payload = [];
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foreach ($this->stats as $projectId => $value) {
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$payload[$projectId] = $value['connectionsTotal'];
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}
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foreach ($this->subscriptions['console']['role:member']['project'] as $connection => $value) {
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$server->push(
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$connection,
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json_encode([
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'event' => 'stats.connections',
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'channels' => ['project'],
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'timestamp' => time(),
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'payload' => $payload
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]),
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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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}
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}
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}
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private function addPermission(array $event)
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{
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$project = $event['project'];
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$userId = $event['userId'];
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if (array_key_exists($project, $this->subscriptions) && array_key_exists('user:'.$userId, $this->subscriptions[$project])) {
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$connection = array_key_first(reset($this->subscriptions[$project]['user:'.$userId]));
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} else {
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return;
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}
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/**
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* This is redundant soon and will be gone with merging the usage branch.
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*/
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$db = $this->register->get('dbPool')->get();
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$cache = $this->register->get('redisPool')->get();
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$projectDB = new Database();
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$projectDB->setAdapter(new RedisAdapter(new MySQLAdapter($db, $cache), $cache));
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$projectDB->setNamespace('app_'.$project);
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$projectDB->setMocks(Config::getParam('collections', []));
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$user = $projectDB->getDocument($userId);
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Parser::setUser($user);
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$roles = Parser::getRoles();
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Parser::subscribe($project, $connection, $roles, $this->subscriptions, $this->connections, $this->connections[$connection]['channels']);
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$this->register->get('dbPool')->put($db);
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$this->register->get('redisPool')->put($cache);
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}
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}
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