Import latest app updates from streamline

An updated set of source files and initialization was provided by streamline to
address issues observed during initial testing. These files have been updated in
order to generate a new set of app images.

docker/streamline-src/vendor/symfony/var-dumper/Server/DumpServer.php

@@ -1,109 +0,0 @@
-<?php
-
-/*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Symfony\Component\VarDumper\Server;
-
-use Psr\Log\LoggerInterface;
-use Symfony\Component\VarDumper\Cloner\Data;
-use Symfony\Component\VarDumper\Cloner\Stub;
-
-/**
- * A server collecting Data clones sent by a ServerDumper.
- *
- * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
- *
- * @final
- */
-class DumpServer
-{
-    private string $host;
-    private ?LoggerInterface $logger;
-
-    /**
-     * @var resource|null
-     */
-    private $socket;
-
-    public function __construct(string $host, ?LoggerInterface $logger = null)
-    {
-        if (!str_contains($host, '://')) {
-            $host = 'tcp://'.$host;
-        }
-
-        $this->host = $host;
-        $this->logger = $logger;
-    }
-
-    public function start(): void
-    {
-        if (!$this->socket = stream_socket_server($this->host, $errno, $errstr)) {
-            throw new \RuntimeException(sprintf('Server start failed on "%s": ', $this->host).$errstr.' '.$errno);
-        }
-    }
-
-    public function listen(callable $callback): void
-    {
-        if (null === $this->socket) {
-            $this->start();
-        }
-
-        foreach ($this->getMessages() as $clientId => $message) {
-            $this->logger?->info('Received a payload from client {clientId}', ['clientId' => $clientId]);
-
-            $payload = @unserialize(base64_decode($message), ['allowed_classes' => [Data::class, Stub::class]]);
-
-            // Impossible to decode the message, give up.
-            if (false === $payload) {
-                $this->logger?->warning('Unable to decode a message from {clientId} client.', ['clientId' => $clientId]);
-
-                continue;
-            }
-
-            if (!\is_array($payload) || \count($payload) < 2 || !$payload[0] instanceof Data || !\is_array($payload[1])) {
-                $this->logger?->warning('Invalid payload from {clientId} client. Expected an array of two elements (Data $data, array $context)', ['clientId' => $clientId]);
-
-                continue;
-            }
-
-            [$data, $context] = $payload;
-
-            $callback($data, $context, $clientId);
-        }
-    }
-
-    public function getHost(): string
-    {
-        return $this->host;
-    }
-
-    private function getMessages(): iterable
-    {
-        $sockets = [(int) $this->socket => $this->socket];
-        $write = [];
-
-        while (true) {
-            $read = $sockets;
-            stream_select($read, $write, $write, null);
-
-            foreach ($read as $stream) {
-                if ($this->socket === $stream) {
-                    $stream = stream_socket_accept($this->socket);
-                    $sockets[(int) $stream] = $stream;
-                } elseif (feof($stream)) {
-                    unset($sockets[(int) $stream]);
-                    fclose($stream);
-                } else {
-                    yield (int) $stream => fgets($stream);
-                }
-            }
-        }
-    }
-}