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<?php
namespace Bitrix\Main\Session;
use Bitrix\Main\Application;
use Bitrix\Main\Context;
use Bitrix\Main\Diag\Helper;
use Bitrix\Main\EventManager;
use Bitrix\Main\Security\Cipher;
use Bitrix\Main\Security\SecurityException;
final class Debugger
{
public const TO_FILE = 0b001;
public const TO_HEADER = 0b010;
public const TO_ALL = self::TO_FILE | self::TO_HEADER;
protected int $mode = 0;
private array $config = [];
public function __construct(int $mode = 0)
{
$this->setMode($mode);
EventManager::getInstance()->addEventHandlerCompatible('main', 'OnPageStart', function(){
$this->logConfiguration($this->config);
});
}
public function setMode(int $mode): void
{
$this->mode = $mode;
}
public function logConfiguration(array $config): void
{
$mode = $config['mode'] ?? 'unknown';
$type = $config['handlers']['general']['type'] ?? 'unknown';
$this->addHeader('Conf', "{$mode}:{$type}");
}
public function detectFirstUsage(): void
{
$firstUsage = null;
$traceItems = Helper::getBackTrace(10, DEBUG_BACKTRACE_IGNORE_ARGS, 4);
foreach ($traceItems as $item)
{
if (!empty($item['class']) && strpos($item['file'], 'lib/session/'))
{
continue;
}
$firstUsage = "{$item['file']}:{$item['line']}";
break;
}
if ($firstUsage)
{
$this->addHeader("Usage", $firstUsage);
}
}
public function logToFile($text): void
{
if ($this->mode & self::TO_FILE)
{
$requestUri = Application::getInstance()->getContext()->getServer()->getRequestUri();
AddMessage2Log($text . ' ' . $requestUri, 'main', 20);
}
}
protected function addHeader(string $category, string $value): void
{
$context = Context::getCurrent();
if (!($context instanceof Context))
{
return;
}
if ($this->mode & self::TO_HEADER)
{
if ($this->shouldEncryptValue())
{
$value = $this->encryptValue($value);
}
$response = $context->getResponse();
$response->addHeader("X-Session-{$category}", $value);
}
}
protected function getCryptoKey(): ?string
{
return $this->config['debugKey'] ?? null;
}
protected function shouldEncryptValue(): bool
{
return !empty($this->getCryptoKey());
}
protected function encryptValue(string $value): string
{
try
{
$cipher = new Cipher();
$encryptedValue = $cipher->encrypt($value, $this->getCryptoKey());
return $this->encodeUrlSafeB64($encryptedValue);
}
catch (SecurityException $securityException)
{
return '';
}
}
private function encodeUrlSafeB64(string $input): string
{
return str_replace('=', '', strtr(base64_encode($input), '+/', '-_'));
}
public function storeConfig(array $sessionConfig): void
{
$this->config = $sessionConfig;
}
}