Greg Sarjeant
d9d0ed9571
Protect functions that interact with databases and filesystems. Reviewed-on: https://gitea.subcultureofone.org/greg/tkr/pulls/55 Co-authored-by: Greg Sarjeant <greg@subcultureofone.org> Co-committed-by: Greg Sarjeant <greg@subcultureofone.org>
119 lines
3.6 KiB
PHP
119 lines
3.6 KiB
PHP
<?php
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/*
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* Initialize fundamental configuration
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*/
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// Store and validate request data
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$method = $_SERVER['REQUEST_METHOD'];
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$request = $_SERVER['REQUEST_URI'];
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$path = parse_url($request, PHP_URL_PATH);
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// return a 404 if a request for a .php file gets this far.
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if (preg_match('/\.php$/', $path)) {
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http_response_code(404);
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echo '<h1>404 Not Found</h1>';
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exit;
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}
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// Define base paths and load classes
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include_once(dirname(dirname(__FILE__)) . "/config/bootstrap.php");
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/*
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* Validate application state before processing request
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*/
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// Check prerequisites (includes database connection and migrations)
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$prerequisites = new Prerequisites();
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if (!$prerequisites->validate()) {
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$prerequisites->generateWebSummary();
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exit;
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}
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// Get the working database connection from prerequisites
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$db = $prerequisites->getDatabase();
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// Make sure the initial setup is complete unless we're already heading to setup
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if (!(preg_match('/setup$/', $path))) {
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try {
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// Make sure required tables (user, settings) are populated
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$user_count = (int) $db->query("SELECT COUNT(*) FROM user")->fetchColumn();
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$settings_count = (int) $db->query("SELECT COUNT(*) FROM settings")->fetchColumn();
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// If either required table has no records, redirect to setup.
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if ($user_count === 0 || $settings_count === 0){
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$init = require APP_ROOT . '/config/init.php';
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header('Location: ' . $init['base_path'] . 'setup');
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exit;
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}
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} catch (Exception $e) {
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// Database error during setup validation - show error page
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error_log("Database error during setup validation: " . $e->getMessage());
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http_response_code(500);
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echo "<h1>Database Error</h1>";
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echo "<p>Cannot validate setup status. The database may be corrupted or locked.</p>";
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echo "<p>Please check your installation or contact your hosting provider.</p>";
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exit;
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}
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}
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/*
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* Begin processing request
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*/
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// Initialize application context with all dependencies
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global $app;
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$app = [
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'db' => $db,
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'config' => (new ConfigModel($db))->get(),
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'user' => (new UserModel($db))->get(),
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];
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// Start a session and generate a CSRF Token
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Session::start();
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Session::generateCsrfToken();
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// Remove the base path from the URL
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if (strpos($path, $app['config']->basePath) === 0) {
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$path = substr($path, strlen($app['config']->basePath));
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}
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// strip the trailing slash from the resulting route
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$path = trim($path, '/');
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// Set route context for logging
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Log::setRouteContext("$method $path");
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Log::debug("Path requested: {$path}");
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// if this is a POST and we aren't in setup,
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// make sure there's a valid session
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// if not, redirect to /login or die as appropriate
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if ($method === 'POST' && $path != 'setup') {
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if ($path != 'login'){
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if (!Session::isValid($_POST['csrf_token'])) {
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// Invalid session - redirect to /login
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Log::info('Attempt to POST with invalid session. Redirecting to login.');
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header('Location: ' . Util::buildRelativeUrl($app['config']->basePath, 'login'));
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exit;
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}
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} else {
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if (!Session::isValidCsrfToken($_POST['csrf_token'])) {
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// Just die if the token is invalid on login
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Log::error("Attempt to log in with invalid CSRF token.");
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die('Invalid CSRF token');
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exit;
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}
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}
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}
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// Set content type
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header('Content-Type: text/html; charset=utf-8');
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// Render the requested route or throw a 404
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$router = new Router();
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if (!$router->route($path, $method)){
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http_response_code(404);
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echo "404 - Page Not Found";
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exit;
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}
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