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<?php
declare(strict_types=1);
namespace PhpMyAdmin;
use FastRoute\Dispatcher;
use Psr\Container\ContainerInterface;
use FastRoute\RouteParser\Std as RouteParserStd;
use FastRoute\DataGenerator\GroupCountBased as DataGeneratorGroupCountBased;
use FastRoute\Dispatcher\GroupCountBased as DispatcherGroupCountBased;
use FastRoute\RouteCollector;
use function htmlspecialchars;
use function mb_strlen;
use function rawurldecode;
use function sprintf;
use function is_writable;
use function file_exists;
use function is_array;
use RuntimeException;
use function var_export;
use function is_readable;
use function trigger_error;
use const E_USER_WARNING;
use function fopen;
use function fwrite;
use function fclose;
/**
* Class used to warm up the routing cache and manage routing.
*/
class Routing
{
public const ROUTES_CACHE_FILE = CACHE_DIR . 'routes.cache.php';
public static function getDispatcher(): Dispatcher
{
$routes = require ROOT_PATH . 'libraries/routes.php';
return self::routesCachedDispatcher($routes);
}
public static function skipCache(): bool
{
global $cfg;
return ($cfg['environment'] ?? '') === 'development';
}
public static function canWriteCache(): bool
{
$cacheFileExists = file_exists(self::ROUTES_CACHE_FILE);
$canWriteFile = is_writable(self::ROUTES_CACHE_FILE);
if ($cacheFileExists && $canWriteFile) {
return true;
}
// Write without read does not work, chmod 200 for example
if (! $cacheFileExists && is_writable(CACHE_DIR) && is_readable(CACHE_DIR)) {
return true;
}
return $canWriteFile;
}
private static function routesCachedDispatcher(callable $routeDefinitionCallback): Dispatcher
{
$skipCache = self::skipCache();
// If skip cache is enabled, do not try to read the file
// If no cache skipping then read it and use it
if (! $skipCache && file_exists(self::ROUTES_CACHE_FILE)) {
/** @psalm-suppress MissingFile */
$dispatchData = require self::ROUTES_CACHE_FILE;
if (! is_array($dispatchData)) {
throw new RuntimeException('Invalid cache file "' . self::ROUTES_CACHE_FILE . '"');
}
return new DispatcherGroupCountBased($dispatchData);
}
$routeCollector = new RouteCollector(
new RouteParserStd(),
new DataGeneratorGroupCountBased()
);
$routeDefinitionCallback($routeCollector);
/** @var RouteCollector $routeCollector */
$dispatchData = $routeCollector->getData();
$canWriteCache = self::canWriteCache();
// If skip cache is enabled, do not try to write it
// If no skip cache then try to write if write is possible
if (! $skipCache && $canWriteCache) {
$writeWorks = self::writeCache(
'<?php return ' . var_export($dispatchData, true) . ';'
);
if (! $writeWorks) {
trigger_error(
sprintf(
__(
'The routing cache could not be written, '
. 'you need to adjust permissions on the folder/file "%s"'
),
self::ROUTES_CACHE_FILE
),
E_USER_WARNING
);
}
}
return new DispatcherGroupCountBased($dispatchData);
}
public static function writeCache(string $cacheContents): bool
{
$handle = @fopen(self::ROUTES_CACHE_FILE, 'w');
if ($handle === false) {
return false;
}
$couldWrite = fwrite($handle, $cacheContents);
fclose($handle);
return $couldWrite !== false;
}
public static function getCurrentRoute(): string
{
/** @var string $route */
$route = $_GET['route'] ?? $_POST['route'] ?? '/';
/**
* See FAQ 1.34.
*
* @see https://docs.phpmyadmin.net/en/latest/faq.html#faq1-34
*/
if (($route === '/' || $route === '') && isset($_GET['db']) && mb_strlen($_GET['db']) !== 0) {
$route = '/database/structure';
if (isset($_GET['table']) && mb_strlen($_GET['table']) !== 0) {
$route = '/sql';
}
}
return $route;
}
/**
* Call associated controller for a route using the dispatcher
*/
public static function callControllerForRoute(
string $route,
Dispatcher $dispatcher,
ContainerInterface $container
): void {
$routeInfo = $dispatcher->dispatch(
$_SERVER['REQUEST_METHOD'],
rawurldecode($route)
);
if ($routeInfo[0] === Dispatcher::NOT_FOUND) {
/** @var Response $response */
$response = $container->get(Response::class);
$response->setHttpResponseCode(404);
echo Message::error(sprintf(
__('Error 404! The page %s was not found.'),
'<code>' . htmlspecialchars($route) . '</code>'
))->getDisplay();
return;
}
if ($routeInfo[0] === Dispatcher::METHOD_NOT_ALLOWED) {
/** @var Response $response */
$response = $container->get(Response::class);
$response->setHttpResponseCode(405);
echo Message::error(__('Error 405! Request method not allowed.'))->getDisplay();
return;
}
if ($routeInfo[0] !== Dispatcher::FOUND) {
return;
}
[$controllerName, $action] = $routeInfo[1];
$controller = $container->get($controllerName);
$controller->$action($routeInfo[2]);
}
}