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<?php
declare(strict_types=1);
namespace Sentry\Integration;
use GuzzleHttp\Psr7\Utils;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\UploadedFileInterface;
use Sentry\Event;
use Sentry\Exception\JsonException;
use Sentry\Options;
use Sentry\SentrySdk;
use Sentry\State\Scope;
use Sentry\UserDataBag;
use Sentry\Util\JSON;
use Symfony\Component\OptionsResolver\Options as SymfonyOptions;
use Symfony\Component\OptionsResolver\OptionsResolver;
/**
* This integration collects information from the request and attaches them to
* the event.
*
* @author Stefano Arlandini <sarlandini@alice.it>
*/
final class RequestIntegration implements IntegrationInterface
{
/**
* This constant represents the size limit in bytes beyond which the body
* of the request is not captured when the `max_request_body_size` option
* is set to `small`.
*/
private const REQUEST_BODY_SMALL_MAX_CONTENT_LENGTH = 10 ** 3;
/**
* This constant represents the size limit in bytes beyond which the body
* of the request is not captured when the `max_request_body_size` option
* is set to `medium`.
*/
private const REQUEST_BODY_MEDIUM_MAX_CONTENT_LENGTH = 10 ** 4;
/**
* This constant is a map of maximum allowed sizes for each value of the
* `max_request_body_size` option.
*/
private const MAX_REQUEST_BODY_SIZE_OPTION_TO_MAX_LENGTH_MAP = [
'none' => 0,
'small' => self::REQUEST_BODY_SMALL_MAX_CONTENT_LENGTH,
'medium' => self::REQUEST_BODY_MEDIUM_MAX_CONTENT_LENGTH,
'always' => -1,
];
/**
* This constant defines the default list of headers that may contain
* sensitive data and that will be sanitized if sending PII is disabled.
*/
private const DEFAULT_SENSITIVE_HEADERS = [
'Authorization',
'Cookie',
'Set-Cookie',
'X-Forwarded-For',
'X-Real-IP',
];
/**
* @var RequestFetcherInterface PSR-7 request fetcher
*/
private $requestFetcher;
/**
* @var array<string, mixed> The options
*/
private $options;
/**
* Constructor.
*
* @param RequestFetcherInterface|null $requestFetcher PSR-7 request fetcher
* @param array<string, mixed> $options The options
*
* @psalm-param array{
* pii_sanitize_headers?: string[]
* } $options
*/
public function __construct(?RequestFetcherInterface $requestFetcher = null, array $options = [])
{
$resolver = new OptionsResolver();
$this->configureOptions($resolver);
$this->requestFetcher = $requestFetcher ?? new RequestFetcher();
$this->options = $resolver->resolve($options);
}
/**
* {@inheritdoc}
*/
public function setupOnce(): void
{
Scope::addGlobalEventProcessor(function (Event $event): Event {
$currentHub = SentrySdk::getCurrentHub();
$integration = $currentHub->getIntegration(self::class);
$client = $currentHub->getClient();
// The client bound to the current hub, if any, could not have this
// integration enabled. If this is the case, bail out
if (null === $integration || null === $client) {
return $event;
}
$this->processEvent($event, $client->getOptions());
return $event;
});
}
private function processEvent(Event $event, Options $options): void
{
$request = $this->requestFetcher->fetchRequest();
if (null === $request) {
return;
}
$requestData = [
'url' => (string) $request->getUri(),
'method' => $request->getMethod(),
];
if ($request->getUri()->getQuery()) {
$requestData['query_string'] = $request->getUri()->getQuery();
}
if ($options->shouldSendDefaultPii()) {
$serverParams = $request->getServerParams();
if (isset($serverParams['REMOTE_ADDR'])) {
$user = $event->getUser();
$requestData['env']['REMOTE_ADDR'] = $serverParams['REMOTE_ADDR'];
if (null === $user) {
$user = UserDataBag::createFromUserIpAddress($serverParams['REMOTE_ADDR']);
} elseif (null === $user->getIpAddress()) {
$user->setIpAddress($serverParams['REMOTE_ADDR']);
}
$event->setUser($user);
}
$requestData['cookies'] = $request->getCookieParams();
$requestData['headers'] = $request->getHeaders();
} else {
$requestData['headers'] = $this->sanitizeHeaders($request->getHeaders());
}
$requestBody = $this->captureRequestBody($options, $request);
if (!empty($requestBody)) {
$requestData['data'] = $requestBody;
}
$event->setRequest($requestData);
}
/**
* Removes headers containing potential PII.
*
* @param array<string, string[]> $headers Array containing request headers
*
* @return array<string, string[]>
*/
private function sanitizeHeaders(array $headers): array
{
foreach ($headers as $name => $values) {
if (!\in_array(strtolower($name), $this->options['pii_sanitize_headers'], true)) {
continue;
}
foreach ($values as $headerLine => $headerValue) {
$headers[$name][$headerLine] = '[Filtered]';
}
}
return $headers;
}
/**
* Gets the decoded body of the request, if available. If the Content-Type
* header contains "application/json" then the content is decoded and if
* the parsing fails then the raw data is returned. If there are submitted
* fields or files, all of their information are parsed and returned.
*
* @param Options $options The options of the client
* @param ServerRequestInterface $request The server request
*
* @return mixed
*/
private function captureRequestBody(Options $options, ServerRequestInterface $request)
{
$maxRequestBodySize = $options->getMaxRequestBodySize();
$requestBodySize = (int) $request->getHeaderLine('Content-Length');
if (!$this->isRequestBodySizeWithinReadBounds($requestBodySize, $maxRequestBodySize)) {
return null;
}
$requestData = $request->getParsedBody();
$requestData = array_merge(
$this->parseUploadedFiles($request->getUploadedFiles()),
\is_array($requestData) ? $requestData : []
);
if (!empty($requestData)) {
return $requestData;
}
$requestBody = Utils::copyToString($request->getBody(), self::MAX_REQUEST_BODY_SIZE_OPTION_TO_MAX_LENGTH_MAP[$maxRequestBodySize]);
if ('application/json' === $request->getHeaderLine('Content-Type')) {
try {
return JSON::decode($requestBody);
} catch (JsonException $exception) {
// Fallback to returning the raw data from the request body
}
}
return $requestBody;
}
/**
* Create an array with the same structure as $uploadedFiles, but replacing
* each UploadedFileInterface with an array of info.
*
* @param array<string, mixed> $uploadedFiles The uploaded files info from a PSR-7 server request
*
* @return array<string, mixed>
*/
private function parseUploadedFiles(array $uploadedFiles): array
{
$result = [];
foreach ($uploadedFiles as $key => $item) {
if ($item instanceof UploadedFileInterface) {
$result[$key] = [
'client_filename' => $item->getClientFilename(),
'client_media_type' => $item->getClientMediaType(),
'size' => $item->getSize(),
];
} elseif (\is_array($item)) {
$result[$key] = $this->parseUploadedFiles($item);
} else {
throw new \UnexpectedValueException(sprintf('Expected either an object implementing the "%s" interface or an array. Got: "%s".', UploadedFileInterface::class, \is_object($item) ? \get_class($item) : \gettype($item)));
}
}
return $result;
}
private function isRequestBodySizeWithinReadBounds(int $requestBodySize, string $maxRequestBodySize): bool
{
if ($requestBodySize <= 0) {
return false;
}
if ('none' === $maxRequestBodySize) {
return false;
}
if ('small' === $maxRequestBodySize && $requestBodySize > self::REQUEST_BODY_SMALL_MAX_CONTENT_LENGTH) {
return false;
}
if ('medium' === $maxRequestBodySize && $requestBodySize > self::REQUEST_BODY_MEDIUM_MAX_CONTENT_LENGTH) {
return false;
}
return true;
}
/**
* Configures the options of the client.
*
* @param OptionsResolver $resolver The resolver for the options
*/
private function configureOptions(OptionsResolver $resolver): void
{
$resolver->setDefault('pii_sanitize_headers', self::DEFAULT_SENSITIVE_HEADERS);
$resolver->setAllowedTypes('pii_sanitize_headers', 'string[]');
$resolver->setNormalizer('pii_sanitize_headers', static function (SymfonyOptions $options, array $value): array {
return array_map('strtolower', $value);
});
}
}