mirror of
https://github.com/vichan-devel/vichan.git
synced 2025-01-22 11:23:45 +01:00
386 lines
12 KiB
PHP
386 lines
12 KiB
PHP
<?php
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/*
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* Copyright (c) 2010-2024 Tinyboard Development Group
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*/
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use Vichan\Context;
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require_once 'inc/bootstrap.php';
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if ($config['debug']) {
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$parse_start_time = microtime(true);
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}
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require_once 'inc/mod/pages.php';
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/**
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* Class Router
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*
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* Handles HTTP request routing.
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*/
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class Router {
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/** @var array $pages Array of URL patterns and their corresponding handlers */
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private array $pages;
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/** @var string $query The query string from the HTTP request */
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private string $query;
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/** @var mixed $mod Mod information for the current user session */
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private mixed $mod;
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/** @var array $config Configuration settings for the application */
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private array $config;
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/** @var bool $securePostOnly Indicates if the current handler requires a secure POST request */
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private bool $securePostOnly = false;
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/**
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* Router constructor.
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*
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* @param Context $ctx The application context object
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* @param mixed|null $mod Mod information for the current user session
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*/
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public function __construct(Context $ctx, mixed $mod = null) {
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$this->config = $ctx->get('config');
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$this->mod = $mod;
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$this->query = isset($_SERVER['QUERY_STRING']) ? rawurldecode($_SERVER['QUERY_STRING']) : '';
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$this->initializePages();
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}
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/**
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* Initializes the array of pages and their handlers.
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*
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* This method sets up the routing table for various endpoints.
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*/
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private function initializePages(): void {
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$this->pages = [
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'' => ':?/', // redirect to dashboard
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'/' => 'dashboard', // dashboard
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'/confirm/(.+)' => 'confirm', // confirm action (if javascript didn't work)
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'/logout' => 'secure logout', // logout
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'/users' => 'users', // manage users
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'/users/(\d+)/(promote|demote)' => 'secure user_promote', // prmote/demote user
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'/users/(\d+)' => 'secure_POST user', // edit user
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'/users/new' => 'secure_POST user_new', // create a new user
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'/new_PM/([^/]+)' => 'secure_POST new_pm', // create a new pm
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'/PM/(\d+)(/reply)?' => 'pm', // read a pm
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'/inbox' => 'inbox', // pm inbox
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'/log' => 'log', // modlog
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'/log/(\d+)' => 'log', // modlog
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'/log:([^/:]+)' => 'user_log', // modlog
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'/log:([^/:]+)/(\d+)' => 'user_log', // modlog
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'/log:b:([^/]+)' => 'board_log', // modlog
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'/log:b:([^/]+)/(\d+)' => 'board_log', // modlog
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'/edit_news' => 'secure_POST news', // view news
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'/edit_news/(\d+)' => 'secure_POST news', // view news
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'/edit_news/delete/(\d+)' => 'secure news_delete', // delete from news
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'/edit_pages(?:/?(\%b)?)' => 'secure_POST pages', // edit static pages from board
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'/edit_page/(\d+)' => 'secure_POST edit_page', // edit site-wide static pages
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'/edit_pages/delete/([a-z0-9]+)' => 'secure delete_page', // delete site-wide static pages
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'/edit_pages/delete/([a-z0-9]+)/(\%b)' => 'secure delete_page_board', // delete static pages from board
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'/noticeboard' => 'secure_POST noticeboard', // view noticeboard
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'/noticeboard/(\d+)' => 'secure_POST noticeboard', // view noticeboard
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'/noticeboard/delete/(\d+)' => 'secure noticeboard_delete', // delete from noticeboard
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'/edit/(\%b)' => 'secure_POST edit_board', // edit board details
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'/new-board' => 'secure_POST new_board', // create a new board
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'/rebuild' => 'secure_POST rebuild', // rebuild static files
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'/reports' => 'reports', // report queue
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'/reports/(\d+)/dismiss(&all|&post)?' => 'secure report_dismiss', // dismiss a report
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'/IP/([\w.:]+)' => 'secure_POST ip', // view ip address
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'/IP/([\w.:]+)/remove_note/(\d+)' => 'secure ip_remove_note', // remove note from ip address
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'/ban' => 'secure_POST ban', // new ban
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'/bans' => 'secure_POST bans', // ban list
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'/bans.json' => 'secure bans_json', // ban list JSON
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'/edit_ban/(\d+)' => 'secure_POST edit_ban', // edit ban
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'/ban-appeals' => 'secure_POST ban_appeals', // view ban appeals
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'/recent/(\d+)' => 'recent_posts', // view recent posts
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'/search' => 'search_redirect', // search
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'/search/(posts|IP_notes|bans|log)/(.+)/(\d+)' => 'search', // search
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'/search/(posts|IP_notes|bans|log)/(.+)' => 'search', // search
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'/(\%b)/ban(&delete)?/(\d+)' => 'secure_POST ban_post', // ban poster
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'/(\%b)/move/(\d+)' => 'secure_POST move', // move thread
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'/(\%b)/move_reply/(\d+)' => 'secure_POST move_reply', // move reply
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'/(\%b)/edit(_raw)?/(\d+)' => 'secure_POST edit_post', // edit post
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'/(\%b)/delete/(\d+)' => 'secure delete', // delete post
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'/(\%b)/deletefile/(\d+)/(\d+)' => 'secure deletefile', // delete file from post
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'/(\%b+)/spoiler/(\d+)/(\d+)' => 'secure spoiler_image', // spoiler file
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'/(\%b)/deletebyip/(\d+)(/global)?' => 'secure deletebyip', // delete all posts by IP address
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'/(\%b)/(un)?lock/(\d+)' => 'secure lock', // lock thread
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'/(\%b)/(un)?sticky/(\d+)' => 'secure sticky', // sticky thread
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'/(\%b)/(un)?cycle/(\d+)' => 'secure cycle', // cycle thread
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'/(\%b)/bump(un)?lock/(\d+)' => 'secure bumplock', // "bumplock" thread
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'/themes' => 'themes_list', // manage themes
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'/themes/(\w+)' => 'secure_POST theme_configure', // configure/reconfigure theme
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'/themes/(\w+)/rebuild' => 'secure theme_rebuild', // rebuild theme
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'/themes/(\w+)/uninstall' => 'secure theme_uninstall', // uninstall theme
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'/config' => 'secure_POST config', // config editor
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'/config/(\%b)' => 'secure_POST config', // config editor
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// This should always be at the end:
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'/(\%b)/' => 'view_board',
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'/(\%b)/' . preg_quote($this->config['file_index'], '!') => 'view_board',
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'/(\%b)/' . str_replace('%d', '(\d+)',
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preg_quote($this->config['file_page'], '!')) => 'view_board',
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'/(\%b)/' . preg_quote($this->config['file_catalog'], '!') => 'view_catalog',
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'/(\%b)/' . preg_quote($this->config['dir']['res'], '!') .
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str_replace('%d', '(\d+)',
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preg_quote($this->config['file_page50'], '!')) => 'view_thread50',
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'/(\%b)/' . preg_quote($this->config['dir']['res'], '!') .
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str_replace('%d', '(\d+)',
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preg_quote($this->config['file_page'], '!')) => 'view_thread',
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// slug
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'/(\%b)/' . preg_quote($this->config['dir']['res'], '!') .
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str_replace([ '%d','%s' ], [ '(\d+)', '[a-z0-9-]+' ],
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preg_quote($this->config['file_page50_slug'], '!')) => 'view_thread50',
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'/(\%b)/' . preg_quote($this->config['dir']['res'], '!') .
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str_replace([ '%d','%s' ], [ '(\d+)', '[a-z0-9-]+' ],
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preg_quote($this->config['file_page_slug'], '!')) => 'view_thread',
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];
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if ($this->config['debug']) {
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$this->addDebugPages();
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}
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if (!$this->mod) {
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$this->pages = ['!^(.+)?$!' => 'login'];
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}
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if (isset($this->config['mod']['custom_pages'])) {
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$this->pages = array_merge($this->pages, $this->config['mod']['custom_pages']);
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}
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$this->prepareRoutes();
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}
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/**
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* Adds debugging pages to the routing table if debugging is enabled.
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*/
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private function addDebugPages(): void {
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$this->pages = array_merge_recursive($this->pages, [
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'/debug/antispam' => 'debug_antispam',
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'/debug/recent' => 'debug_recent_posts',
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'/debug/sql' => 'secure_POST debug_sql',
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]);
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}
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/**
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* Prepares routes by processing page patterns into regex patterns and updating the pages array.
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*/
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private function prepareRoutes(): void {
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$new_pages = [];
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foreach ($this->pages as $key => $callback) {
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if (is_string($callback) && preg_match('/^secure /', $callback)) {
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$key .= '(/(?P<token>[a-f0-9]{8}))?';
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}
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$key = str_replace(
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'\%b',
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'?P<board>' . sprintf(
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substr($this->config['board_path'], 0, -1),
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$this->config['board_regex']
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),
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$key
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);
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$new_pages[
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strpos($key, '!') === 0
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? $key
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: "!^{$key}(?:&[^&=]+=[^&]*)*$!u"
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] = $callback;
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}
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$this->pages = $new_pages;
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}
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/**
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* Handles the incoming request by matching the query string to a route and executing the corresponding handler.
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*/
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public function handleRequest(Context $ctx): void {
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foreach ($this->pages as $uri => $handler) {
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if (preg_match($uri, $this->query, $matches)) {
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$matches[0] = $ctx;
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$this->processBoard($matches);
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if (is_string($handler) && preg_match('/^secure(_POST)? /', $handler, $m)) {
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$this->securePostOnly = isset($m[1]);
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$this->processSecureHandler($matches);
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$handler = $this->processHandler($handler);
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}
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$this->logDebugInfo($uri, $handler);
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$matches = array_values($matches);
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$this->executeHandler($handler, $matches);
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exit;
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}
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}
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$this->error($this->config['error']['404']);
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}
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/**
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* Processes the handler name, removing security prefixes.
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*
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* @param string $handler The handler name
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* @return string The processed handler name
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*/
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private function processHandler(string $handler): string {
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return preg_replace('/^secure(_POST)? /', '', $handler);
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}
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/**
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* Processes the board information from the route matches.
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*
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* @param array &$matches The array of route matches
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*/
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private function processBoard(array &$matches): void {
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if (isset($matches['board'])) {
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$board_match = $matches['board'];
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unset($matches['board']);
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$key = array_search($board_match, $matches);
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if (preg_match(
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'/^' . sprintf(
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substr($this->config['board_path'], 0, -1),
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"({$this->config['board_regex']})"
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) . '$/u',
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$matches[$key],
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$board_match
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)) {
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$matches[$key] = $board_match[1];
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}
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}
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}
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/**
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* Processes POST secure handlers, validating CSRF tokens.
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*
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* @param array &$matches The array of route matches
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*/
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private function processSecureHandler(array &$matches): void {
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if (!$this->securePostOnly || $_SERVER['REQUEST_METHOD'] === 'POST') {
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$token = $this->getToken($matches);
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// CSRF-protected page; validate security token
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$actual_query = preg_replace('!/([a-f0-9]{8})$!', '', $this->query);
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if ($token !== make_secure_link_token(substr($actual_query, 1))) {
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$this->error($this->config['error']['csrf']);
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}
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}
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}
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/**
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* Retrieves the CSRF token from the route matches or POST data.
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*
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* @param array &$matches The array of route matches
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* @return string|null The CSRF token, or null if not found
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*/
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private function getToken(array &$matches): ?string {
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if (isset($matches['token'])) {
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return $matches['token'];
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} elseif (isset($_POST['token'])) {
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return $_POST['token'];
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} else {
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if ($this->securePostOnly) {
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$this->error($this->config['error']['csrf']);
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} else {
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mod_confirm($this->ctx, substr($this->query, 1));
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exit;
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}
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}
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return null;
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}
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/**
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* Logs debug information, if enabled, about the current request.
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*
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* @param string $uri The matched URI pattern
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* @param string $handler The handler name
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*/
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private function logDebugInfo(string $uri, string $handler): void {
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global $debug, $parse_start_time;
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if ($this->config['debug']) {
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$debug['mod_page'] = [
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'req' => $this->query,
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'match' => $uri,
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'handler' => $handler,
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'type' => gettype($handler),
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'secure' => $this->securePostOnly ? 'true' : 'false'
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];
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$debug['time']['parse_mod_req'] = '~' . round((microtime(true) - $parse_start_time) * 1000, 2) . 'ms';
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}
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}
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/**
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* Executes the matched handler with the provided matches.
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*
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* @param string $handler The handler to execute
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* @param array $matches The route matches to pass to the handler
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*/
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private function executeHandler(string $handler, array $matches): void {
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if (is_string($handler)) {
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if ($handler[0] === ':') {
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$this->safeRedirect(substr($handler, 1));
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} elseif (is_callable("mod_{$handler}")) {
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call_user_func_array("mod_{$handler}", $matches);
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} else {
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$this->error("Mod page '{$handler}' not found!");
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}
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} elseif (is_callable($handler)) {
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call_user_func_array($handler, $matches);
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} else {
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$this->error("Mod page '{$handler}' not a string, and not callable!");
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}
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}
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/**
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* Safely redirects to the specified location.
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*
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* @param string $location The URL to redirect to
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*/
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private function safeRedirect(string $location): void {
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header("Location: {$location}", true, $this->config['redirect_http']);
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exit;
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}
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/**
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* Triggers an error with the specified message.
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*
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* @param string $message The error message
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*/
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private function error(string $message): void {
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error($message);
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}
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}
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$ctx = Vichan\build_context($config);
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check_login($ctx, true);
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$router = new Router($ctx, $mod);
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$router->handleRequest($ctx);
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