244 lines
8.1 KiB
PHP
244 lines
8.1 KiB
PHP
<?php
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require_once __DIR__.'/init.php';
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require_once __DIR__.'/../vendor/autoload.php';
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use Appwrite\Auth\Auth;
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use Appwrite\Database\Document;
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use Swoole\WebSocket\Server;
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use Swoole\Http\Request;
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use Swoole\Process;
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use Swoole\WebSocket\Frame;
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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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/**
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* TODO List
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*
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* - Abuse Control / x mesages per connection
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* - CORS Validation
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* - Limit payload size
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* - Message structure: { status: "ok"|"error", event: EVENT_NAME, data: <any arbitrary data> }
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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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* - MQTT support: https://www.swoole.co.uk/docs/modules/swoole-mqtt-server
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* - SSE support: https://github.com/hhxsv5/php-sse
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* - Socket.io support: https://github.com/shuixn/socket.io-swoole-server
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*/
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ini_set('default_socket_timeout', -1);
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Swoole\Runtime::enableCoroutine(SWOOLE_HOOK_ALL);
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$server = new Server("0.0.0.0", 80);
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$subscriptions = [];
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$connections = [];
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$server->on("workerStart", function ($server, $workerId) use (&$subscriptions, &$connections) {
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Console::success('Worker '.++$workerId.' started succefully');
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$attempts = 0;
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$start = time();
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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 #'.$attempts.')');
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sleep(5); // 1 sec delay between connection attempts
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}
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$redis = new Redis();
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$redis->connect('redis', 6379);
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$redis->setOption(Redis::OPT_READ_TIMEOUT, -1);
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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: '.$workerId.')');
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}
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else {
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Console::error('Pub/sub failed (worker: '.$workerId.')');
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}
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$redis->subscribe(['realtime'], function($redis, $channel, $message) use ($server, $workerId, &$connections) {
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$message = 'Message from worker #'.$workerId.'; '.$message;
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// TODO get project and resource ID and itterate over the resource read(?) permissions and send a message to all listeners
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/**
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* Supported Resources:
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* - Collection
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* - Document
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* - Bucket
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* - File
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* - User? / Account? (no permissions)
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* - Session? (no permissions)
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* - Team? (no permissions)
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* - Membership? (no permissions)
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* - Function
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* - Execution
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*/
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foreach($connections as $fd => $connection) {
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if ($server->exist($fd)
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&& $server->isEstablished($fd)
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) {
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Console::info('Sending message: '.$message.' (user: '.$fd.', worker: '.$workerId.')');
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$server->push($fd, $message, SWOOLE_WEBSOCKET_OPCODE_TEXT,
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SWOOLE_WEBSOCKET_FLAG_FIN | SWOOLE_WEBSOCKET_FLAG_COMPRESS);
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}
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else {
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$server->close($fd);
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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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$attempts++;
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continue;
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}
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$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, &$subscriptions) {
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Console::info("Connection open (user: {$request->fd}, worker: {$server->getWorkerId()})");
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$app = new App('');
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$connection = $request->fd;
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$request = new SwooleRequest($request);
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App::setResource('request', function () use ($request) {
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return $request;
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});
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App::setResource('response', function () {
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return null;
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});
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App::setResource('project', function () { // TODO get project from query string
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return new Document();
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});
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App::setResource('user', function () { // TODO get user with JWT token
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return new Document();
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});
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$channels = array_flip($request->getQuery('channels', []));
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$jwt = $request->getQuery('jwt', '');
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$user = $app->getResource('user');
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$project = $app->getResource('project');
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$roles = ['*', 'user:'.$user->getId(), 'role:'.(($user->isEmpty()) ? Auth::USER_ROLE_GUEST : Auth::USER_ROLE_MEMBER)];
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/** @var Appwrite\Database\Document $user */
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/** @var Appwrite\Database\Document $project */
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\array_map(function ($node) use (&$roles) {
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if (isset($node['teamId']) && isset($node['roles'])) {
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$roles[] = 'team:'.$node['teamId'];
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foreach ($node['roles'] as $nodeRole) { // Set all team roles
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$roles[] = 'team:'.$node['teamId'].'/'.$nodeRole;
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}
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}
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}, $user->getAttribute('memberships', []));
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/**
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* Build Subscriptions Tree
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*
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* [PROJECT_ID] ->
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* [ROLE_X] ->
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* [CHANNEL_NAME_X] -> [CONNECTION_ID]
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* [CHANNEL_NAME_Y] -> [CONNECTION_ID]
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* [CHANNEL_NAME_Z] -> [CONNECTION_ID]
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* [ROLE_Y] ->
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* [CHANNEL_NAME_X] -> [CONNECTION_ID]
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* [CHANNEL_NAME_Y] -> [CONNECTION_ID]
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* [CHANNEL_NAME_Z] -> [CONNECTION_ID]
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*/
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if(!isset($subscriptions[$project->getId()])) { // Init Project
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$subscriptions[$project->getId()] = [];
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}
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foreach ($roles as $key => $role) {
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if(!isset($subscriptions[$project->getId()][$role])) { // Add user first connection
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$subscriptions[$project->getId()][$role] = [];
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}
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foreach ($channels as $channel => $list) {
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$subscriptions[$project->getId()][$role][$channel][$connection] = true;
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}
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}
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$connections[$connection] = [
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'projectId' => $project->getId(),
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'roles' => $roles,
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];
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var_dump($project->getId());
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var_dump($project->getAttribute('name'));
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var_dump($user->getId());
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var_dump($user->getAttribute('name'));
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$server->push($connection, json_encode($subscriptions));
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});
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$server->on('message', function(Server $server, Frame $frame) {
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if($frame->data === 'reload') {
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$server->reload();
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}
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Console::info('Recieved message: '.$frame->data.' (user: '.$frame->fd.', worker: '.$server->getWorkerId().')');
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$server->push($frame->fd, json_encode(["hello, worker_id:".$server->getWorkerId(), time()]));
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});
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$server->on('close', function(Server $server, int $fd) use (&$connections, &$subscriptions) {
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$projectId = $connections[$fd]['projectId'] ?? '';
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$roles = $connections[$fd]['roles'] ?? [];
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foreach ($roles as $key => $role) {
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foreach ($subscriptions[$projectId][$role] as $channel => $list) {
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unset($subscriptions[$projectId][$role][$channel][$fd]); // Remove connection
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if(empty($subscriptions[$projectId][$role][$channel])) {
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unset($subscriptions[$projectId][$role][$channel]); // Remove channel when no connections
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}
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}
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if(empty($subscriptions[$projectId][$role])) {
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unset($subscriptions[$projectId][$role]); // Remove role when no channels
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}
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}
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if(empty($subscriptions[$projectId])) { // Remove project when no roles
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unset($subscriptions[$projectId]);
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}
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unset($connections[$fd]);
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Console::info('Connection close: '.$fd);
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var_dump($subscriptions);
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});
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$server->start(); |