Connection.php

<?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 Symfony\Component\VarDumper\Cloner\Data;
use Symfony\Component\VarDumper\Dumper\ContextProvider\ContextProviderInterface;

/**
 * Forwards serialized Data clones to a server.
 *
 * @author Maxime Steinhausser <maxime.steinhausser@gmail.com>
 */
class Connection {
    private string $host;
    
    /**
     * @var resource|null
     */
    private $socket;
    
    /**
     * @param string                     $host             The server host
     * @param ContextProviderInterface[] $contextProviders Context providers indexed by context name
     */
    public function __construct(string $host, array $contextProviders = []) {
        if (!str_contains($host, '://')) {
            $host = 'tcp://' . $host;
        }
        $this->host = $host;
    }
    public function getContextProviders() : array {
        return $this->contextProviders;
    }
    public function write(Data $data) : bool {
        $socketIsFresh = !$this->socket;
        if (!($this->socket = $this->socket ?: $this->createSocket())) {
            return false;
        }
        $context = [
            'timestamp' => microtime(true),
        ];
        foreach ($this->contextProviders as $name => $provider) {
            $context[$name] = $provider->getContext();
        }
        $context = array_filter($context);
        $encodedPayload = base64_encode(serialize([
            $data,
            $context,
        ])) . "\n";
        set_error_handler(static fn() => null);
        try {
            if (-1 !== stream_socket_sendto($this->socket, $encodedPayload)) {
                return true;
            }
            if (!$socketIsFresh) {
                stream_socket_shutdown($this->socket, \STREAM_SHUT_RDWR);
                fclose($this->socket);
                $this->socket = $this->createSocket();
            }
            if (-1 !== stream_socket_sendto($this->socket, $encodedPayload)) {
                return true;
            }
        } finally {
            restore_error_handler();
        }
        return false;
    }
    
    /**
     * @return resource|null
     */
    private function createSocket() {
        set_error_handler(static fn() => null);
        try {
            return stream_socket_client($this->host, $errno, $errstr, 3) ?: null;
        } finally {
            restore_error_handler();
        }
    }

}