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<?php
/**
* Matomo - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik;
use Piwik\Exception\DI\DependencyException;
use Exception;
use Piwik\API\Request;
use Piwik\API\ResponseBuilder;
use Piwik\Container\ContainerDoesNotExistException;
use Piwik\Container\StaticContainer;
use Piwik\Exception\IRedirectException;
use Piwik\Plugins\CoreAdminHome\CustomLogo;
use Piwik\Plugins\Monolog\Processor\ExceptionToTextProcessor;
use Piwik\Log\LoggerInterface;
/**
* Contains Piwik's uncaught exception handler.
*/
class ExceptionHandler
{
public static function setUp()
{
set_exception_handler(['Piwik\\ExceptionHandler', 'handleException']);
}
/**
* @param Exception|\Throwable $exception
*/
public static function handleException($exception)
{
if (\Piwik\Common::isPhpCliMode()) {
self::dieWithCliError($exception);
}
self::dieWithHtmlErrorPage($exception);
}
/**
* @param Exception|\Throwable $exception
*/
public static function dieWithCliError($exception)
{
self::logException($exception);
$message = $exception->getMessage();
if (!method_exists($exception, 'isHtmlMessage') || !$exception->isHtmlMessage()) {
$message = strip_tags(str_replace('<br />', PHP_EOL, $message));
}
$message = sprintf("Uncaught exception in %s line %d:\n%s\n", $exception->getFile(), $exception->getLine(), ExceptionToTextProcessor::getMessageAndWholeBacktrace($exception));
echo $message;
exit(1);
}
/**
* @param Exception|\Throwable $exception
*/
public static function dieWithHtmlErrorPage($exception)
{
// Set an appropriate HTTP response code.
switch (true) {
case ($exception instanceof \Piwik\Http\HttpCodeException || $exception instanceof \Piwik\Exception\NotSupportedBrowserException) && $exception->getCode() > 0:
// For these exception types, use the exception-provided error code.
http_response_code($exception->getCode());
break;
case $exception instanceof \Piwik\Exception\NotYetInstalledException:
http_response_code(404);
break;
default:
http_response_code(500);
}
// Log the error with an appropriate loglevel.
switch (true) {
case $exception instanceof \Piwik\Exception\NotSupportedBrowserException:
// These unsupported browsers are really a client-side problem, so log only at DEBUG level.
self::logException($exception, \Piwik\Log::DEBUG);
break;
default:
self::logException($exception);
}
\Piwik\Common::sendHeader('Content-Type: text/html; charset=utf-8');
try {
echo self::getErrorResponse($exception);
} catch (Exception $e) {
// When there are failures while generating the HTML error response itself,
// we simply print out the error message instead.
echo $exception->getMessage();
}
exit(1);
}
/**
* @param Exception|\Throwable $ex
*/
private static function getErrorResponse($ex)
{
$debugTrace = $ex->getTraceAsString();
$message = $ex->getMessage();
$isHtmlMessage = method_exists($ex, 'isHtmlMessage') && $ex->isHtmlMessage();
if (!$isHtmlMessage && Request::isApiRequest($_GET)) {
$outputFormat = strtolower(\Piwik\Common::getRequestVar('format', 'xml', 'string', $_GET + $_POST));
$response = new ResponseBuilder($outputFormat);
return $response->getResponseException($ex);
} elseif (!$isHtmlMessage) {
$message = \Piwik\Common::sanitizeInputValue($message);
}
$logoHeaderUrl = 'plugins/Morpheus/images/logo.svg';
$logoFaviconUrl = 'plugins/CoreHome/images/favicon.png';
try {
$logo = new CustomLogo();
if ($logo->hasSVGLogo()) {
$logoHeaderUrl = $logo->getSVGLogoUrl();
} else {
$logoHeaderUrl = $logo->getHeaderLogoUrl();
}
$logoFaviconUrl = $logo->getPathUserFavicon();
} catch (Exception $ex) {
try {
\Piwik\Log::debug($ex);
} catch (\Exception $otherEx) {
// DI container may not be setup at this point
}
}
// Unsupported browser errors shouldn't be written to the web server log. At DEBUG logging level this error will
// be written to the application log instead
$writeErrorLog = !$ex instanceof \Piwik\Exception\NotSupportedBrowserException;
$redirectUrl = null;
$countdownToRedirect = null;
if ($ex instanceof IRedirectException) {
$redirectUrl = $ex->getRedirectionUrl();
$countdownToRedirect = $ex->getCountdown();
}
$hostname = \Piwik\Url::getRFCValidHostname();
$hostStr = $hostname ? "[{$hostname}] " : '- ';
$result = Piwik_GetErrorMessagePage($message, $debugTrace, true, true, $logoHeaderUrl, $logoFaviconUrl, null, $hostStr, $writeErrorLog, $redirectUrl, $countdownToRedirect);
try {
/**
* Triggered before a Piwik error page is displayed to the user.
*
* This event can be used to modify the content of the error page that is displayed when
* an exception is caught.
*
* @param string &$result The HTML of the error page.
* @param Exception $ex The Exception displayed in the error page.
*/
\Piwik\Piwik::postEvent('FrontController.modifyErrorPage', [&$result, $ex]);
} catch (ContainerDoesNotExistException $ex) {
// this can happen when an error occurs before the Piwik environment is created
}
return $result;
}
private static function logException($exception, $loglevel = \Piwik\Log::ERROR)
{
try {
switch ($loglevel) {
case \Piwik\Log::DEBUG:
StaticContainer::get(LoggerInterface::class)->debug('Uncaught exception: {exception}', ['exception' => $exception, 'ignoreInScreenWriter' => true]);
break;
case \Piwik\Log::ERROR:
default:
StaticContainer::get(LoggerInterface::class)->error('Uncaught exception: {exception}', ['exception' => $exception, 'ignoreInScreenWriter' => true]);
}
} catch (DependencyException $ex) {
// ignore (occurs if exception is thrown when resolving DI entries)
} catch (ContainerDoesNotExistException $ex) {
// ignore
}
}
}