| 1 |
<?php |
| 2 |
|
| 3 |
/** |
| 4 |
* WordPress redirect module. |
| 5 |
* |
| 6 |
* Provides PHP controlled redirects and monitoring and is the core of the front-end redirection. |
| 7 |
*/ |
| 8 |
class WordPress_Module extends Red_Module { |
| 9 |
/** |
| 10 |
* @var integer |
| 11 |
*/ |
| 12 |
const MODULE_ID = 1; |
| 13 |
|
| 14 |
/** |
| 15 |
* Can we log? |
| 16 |
* |
| 17 |
* @var boolean |
| 18 |
*/ |
| 19 |
private $can_log = true; |
| 20 |
|
| 21 |
/** |
| 22 |
* The target redirect URL |
| 23 |
* |
| 24 |
* @var string|false |
| 25 |
*/ |
| 26 |
private $redirect_url = false; |
| 27 |
|
| 28 |
/** |
| 29 |
* The target redirect code |
| 30 |
* |
| 31 |
* @var integer |
| 32 |
*/ |
| 33 |
private $redirect_code = 0; |
| 34 |
|
| 35 |
/** |
| 36 |
* Copy of redirects that match the requested URL |
| 37 |
* |
| 38 |
* @var Red_Item[] |
| 39 |
*/ |
| 40 |
private $redirects = []; |
| 41 |
|
| 42 |
/** |
| 43 |
* Matched redirect |
| 44 |
* |
| 45 |
* @var Red_Item|false |
| 46 |
*/ |
| 47 |
private $matched = false; |
| 48 |
|
| 49 |
/** |
| 50 |
* Return the module ID |
| 51 |
* |
| 52 |
* @return integer |
| 53 |
*/ |
| 54 |
public function get_id() { |
| 55 |
return self::MODULE_ID; |
| 56 |
} |
| 57 |
|
| 58 |
/** |
| 59 |
* Return the module name |
| 60 |
* |
| 61 |
* @return string |
| 62 |
*/ |
| 63 |
public function get_name() { |
| 64 |
return 'WordPress'; |
| 65 |
} |
| 66 |
|
| 67 |
/** |
| 68 |
* Start the module. Hooks any filters and actions |
| 69 |
* |
| 70 |
* @return void |
| 71 |
*/ |
| 72 |
public function start() { |
| 73 |
// Only run redirect rules if we're not disabled |
| 74 |
if ( ! red_is_disabled() ) { |
| 75 |
// Canonical site settings - https, www, relocate, and aliases |
| 76 |
add_action( 'init', [ $this, 'canonical_domain' ] ); |
| 77 |
|
| 78 |
// The main redirect loop |
| 79 |
add_action( 'init', [ $this, 'init' ] ); |
| 80 |
|
| 81 |
// Send site HTTP headers as well as 410 error codes |
| 82 |
add_action( 'send_headers', [ $this, 'send_headers' ] ); |
| 83 |
|
| 84 |
// Redirect HTTP headers and server-specific overrides |
| 85 |
add_filter( 'wp_redirect', [ $this, 'wp_redirect' ], 1, 2 ); |
| 86 |
|
| 87 |
// Allow permalinks to be redirected |
| 88 |
add_filter( 'pre_handle_404', [ $this, 'pre_handle_404' ], 10, 2 ); |
| 89 |
|
| 90 |
// Cache support |
| 91 |
add_action( 'redirection_matched', [ $this, 'cache_redirects' ], 10, 3 ); |
| 92 |
add_action( 'redirection_last', [ $this, 'cache_unmatched_redirects' ], 10, 3 ); |
| 93 |
} |
| 94 |
|
| 95 |
// Setup the various filters and actions that allow Redirection to happen |
| 96 |
add_action( 'redirection_visit', [ $this, 'redirection_visit' ], 10, 3 ); |
| 97 |
add_action( 'redirection_do_nothing', [ $this, 'redirection_do_nothing' ] ); |
| 98 |
|
| 99 |
// Prevent WordPress overriding a canonical redirect |
| 100 |
add_filter( 'redirect_canonical', [ $this, 'redirect_canonical' ], 10, 2 ); |
| 101 |
|
| 102 |
// Log 404s and perform 'URL and WordPress page type' redirects |
| 103 |
add_action( 'template_redirect', [ $this, 'template_redirect' ] ); |
| 104 |
|
| 105 |
// Back-compat for < database 4.2 |
| 106 |
add_filter( 'redirection_404_data', [ $this, 'log_back_compat' ] ); |
| 107 |
add_filter( 'redirection_log_data', [ $this, 'log_back_compat' ] ); |
| 108 |
|
| 109 |
// Record the redirect agent |
| 110 |
add_filter( 'x_redirect_by', [ $this, 'record_redirect_by' ], 90 ); |
| 111 |
} |
| 112 |
|
| 113 |
/** |
| 114 |
* Called after no redirect is matched. This allows us to cache a negative result/ |
| 115 |
* |
| 116 |
* @param string $url URL. |
| 117 |
* @param WordPress_Module $wp This. |
| 118 |
* @param array $redirects Array of redirects. |
| 119 |
* @return void |
| 120 |
*/ |
| 121 |
public function cache_unmatched_redirects( $url, $wp, $redirects ) { |
| 122 |
if ( $this->matched ) { |
| 123 |
return; |
| 124 |
} |
| 125 |
|
| 126 |
$this->cache_redirects( $url, $this->matched, $redirects ); |
| 127 |
} |
| 128 |
|
| 129 |
/** |
| 130 |
* Called when a redirect is matched. This allows us to cache a positive result. |
| 131 |
* |
| 132 |
* @param string $url URL. |
| 133 |
* @param Red_Item|false $matched_redirect Matched redirect. |
| 134 |
* @param array $redirects Array of redirects. |
| 135 |
* @return void |
| 136 |
*/ |
| 137 |
public function cache_redirects( $url, $matched_redirect, $redirects ) { |
| 138 |
$cache = Redirect_Cache::init(); |
| 139 |
$cache->set( $url, $matched_redirect, $redirects ); |
| 140 |
} |
| 141 |
|
| 142 |
/** |
| 143 |
* If we have a 404 then check for any permalink migrations |
| 144 |
* |
| 145 |
* @param boolean $result Return result. |
| 146 |
* @param WP_Query $query WP_Query object. |
| 147 |
* @return boolean |
| 148 |
*/ |
| 149 |
public function pre_handle_404( $result, WP_Query $query ) { |
| 150 |
$options = red_get_options(); |
| 151 |
|
| 152 |
if ( count( $options['permalinks'] ) > 0 ) { |
| 153 |
include_once dirname( dirname( __FILE__ ) ) . '/models/permalinks.php'; |
| 154 |
|
| 155 |
$permalinks = new Red_Permalinks( $options['permalinks'] ); |
| 156 |
$permalinks->migrate( $query ); |
| 157 |
} |
| 158 |
|
| 159 |
return $result; |
| 160 |
} |
| 161 |
|
| 162 |
/** |
| 163 |
* Back-compatability for Redirection databases older than 4.2. Prevents errors from storing data that has no DB column |
| 164 |
* |
| 165 |
* @param array $insert Data to log. |
| 166 |
* @return array |
| 167 |
*/ |
| 168 |
public function log_back_compat( $insert ) { |
| 169 |
// Remove columns not supported in older versions |
| 170 |
$status = new Red_Database_Status(); |
| 171 |
|
| 172 |
if ( ! $status->does_support( '4.2' ) ) { |
| 173 |
foreach ( [ 'request_data', 'request_method', 'http_code', 'domain', 'redirect_by' ] as $ignore ) { |
| 174 |
unset( $insert[ $ignore ] ); |
| 175 |
} |
| 176 |
} |
| 177 |
|
| 178 |
return $insert; |
| 179 |
} |
| 180 |
|
| 181 |
/** |
| 182 |
* This ensures that a matched URL is not overriddden by WordPress, if the URL happens to be a WordPress URL of some kind |
| 183 |
* For example: /?author=1 will be redirected to /author/name unless this returns false |
| 184 |
* |
| 185 |
* @param string $redirect_url The redirected URL. |
| 186 |
* @param string $requested_url The requested URL. |
| 187 |
* @return string|false |
| 188 |
*/ |
| 189 |
public function redirect_canonical( $redirect_url, $requested_url ) { |
| 190 |
if ( $this->matched ) { |
| 191 |
return false; |
| 192 |
} |
| 193 |
|
| 194 |
return $redirect_url; |
| 195 |
} |
| 196 |
|
| 197 |
/** |
| 198 |
* WordPress 'template_redirect' hook. Used to check for 404s |
| 199 |
* |
| 200 |
* @return void |
| 201 |
*/ |
| 202 |
public function template_redirect() { |
| 203 |
if ( ! is_404() || $this->matched ) { |
| 204 |
return; |
| 205 |
} |
| 206 |
|
| 207 |
$this->is_url_and_page_type(); |
| 208 |
|
| 209 |
$options = red_get_options(); |
| 210 |
|
| 211 |
if ( isset( $options['expire_404'] ) && $options['expire_404'] >= 0 && $this->can_log() ) { |
| 212 |
$details = [ |
| 213 |
'agent' => Redirection_Request::get_user_agent(), |
| 214 |
'referrer' => Redirection_Request::get_referrer(), |
| 215 |
'request_method' => Redirection_Request::get_request_method(), |
| 216 |
'http_code' => 404, |
| 217 |
]; |
| 218 |
|
| 219 |
if ( $options['log_header'] ) { |
| 220 |
$details['request_data'] = [ |
| 221 |
'headers' => Redirection_Request::get_request_headers(), |
| 222 |
]; |
| 223 |
} |
| 224 |
|
| 225 |
Red_404_Log::create( Redirection_Request::get_server(), Redirection_Request::get_request_url(), Redirection_Request::get_ip(), $details ); |
| 226 |
} |
| 227 |
} |
| 228 |
|
| 229 |
/** |
| 230 |
* Return `true` if any of the matched redirects is a 'url and page type', `false` otherwise |
| 231 |
* |
| 232 |
* @return boolean |
| 233 |
*/ |
| 234 |
private function is_url_and_page_type() { |
| 235 |
$page_types = array_values( array_filter( $this->redirects, function( Red_Item $redirect ) { |
| 236 |
return $redirect->match && $redirect->match->get_type() === 'page'; |
| 237 |
} ) ); |
| 238 |
|
| 239 |
if ( count( $page_types ) > 0 ) { |
| 240 |
$request = new Red_Url_Request( Redirection_Request::get_request_url() ); |
| 241 |
$action = $page_types[0]->get_match( $request->get_decoded_url(), $request->get_original_url() ); |
| 242 |
if ( $action ) { |
| 243 |
$action->run(); |
| 244 |
} |
| 245 |
|
| 246 |
return true; |
| 247 |
} |
| 248 |
|
| 249 |
return false; |
| 250 |
} |
| 251 |
|
| 252 |
/** |
| 253 |
* Called by a 'do nothing' action. Return true to stop further processing of the 'do nothing' |
| 254 |
* |
| 255 |
* @return boolean |
| 256 |
*/ |
| 257 |
public function redirection_do_nothing() { |
| 258 |
$this->can_log = false; |
| 259 |
return true; |
| 260 |
} |
| 261 |
|
| 262 |
/** |
| 263 |
* Action fired when a redirect is performed, and used to log the data |
| 264 |
* |
| 265 |
* @param Red_Item $redirect The redirect. |
| 266 |
* @param string $url The source URL. |
| 267 |
* @param string $target The target URL. |
| 268 |
* @return void |
| 269 |
*/ |
| 270 |
public function redirection_visit( $redirect, $url, $target ) { |
| 271 |
$redirect->visit( $url, $target ); |
| 272 |
} |
| 273 |
|
| 274 |
/** |
| 275 |
* Get canonical target |
| 276 |
* |
| 277 |
* @return string|false |
| 278 |
*/ |
| 279 |
public function get_canonical_target() { |
| 280 |
$options = red_get_options(); |
| 281 |
$canonical = new Redirection_Canonical( $options['https'], $options['preferred_domain'], $options['aliases'], get_home_url() ); |
| 282 |
|
| 283 |
// Relocate domain? |
| 284 |
if ( $options['relocate'] ) { |
| 285 |
return $canonical->relocate_request( $options['relocate'], Redirection_Request::get_server_name(), Redirection_Request::get_request_url() ); |
| 286 |
} |
| 287 |
|
| 288 |
// Force HTTPS or www |
| 289 |
return $canonical->get_redirect( Redirection_Request::get_request_server_name(), Redirection_Request::get_request_url() ); |
| 290 |
} |
| 291 |
|
| 292 |
/** |
| 293 |
* Checks for canonical domain requests |
| 294 |
* |
| 295 |
* @return void |
| 296 |
*/ |
| 297 |
public function canonical_domain() { |
| 298 |
$target = $this->get_canonical_target(); |
| 299 |
|
| 300 |
if ( $target ) { |
| 301 |
// phpcs:ignore |
| 302 |
wp_redirect( $target, 301, 'redirection' ); |
| 303 |
die(); |
| 304 |
} |
| 305 |
} |
| 306 |
|
| 307 |
/** |
| 308 |
* Redirection 'main loop'. Checks the currently requested URL against the database and perform a redirect, if necessary. |
| 309 |
* |
| 310 |
* @return void |
| 311 |
*/ |
| 312 |
public function init() { |
| 313 |
if ( $this->matched ) { |
| 314 |
return; |
| 315 |
} |
| 316 |
|
| 317 |
$request = new Red_Url_Request( Redirection_Request::get_request_url() ); |
| 318 |
|
| 319 |
// Make sure we don't try and redirect something essential |
| 320 |
if ( $request->is_valid() && ! $request->is_protected_url() ) { |
| 321 |
do_action( 'redirection_first', $request->get_decoded_url(), $this ); |
| 322 |
|
| 323 |
// Get all redirects that match the URL |
| 324 |
$redirects = Red_Item::get_for_url( $request->get_decoded_url() ); |
| 325 |
|
| 326 |
// Redirects will be ordered by position. Run through the list until one fires |
| 327 |
foreach ( (array) $redirects as $item ) { |
| 328 |
$action = $item->get_match( $request->get_decoded_url(), $request->get_original_url() ); |
| 329 |
|
| 330 |
if ( $action ) { |
| 331 |
$this->matched = $item; |
| 332 |
|
| 333 |
do_action( 'redirection_matched', $request->get_decoded_url(), $item, $redirects ); |
| 334 |
|
| 335 |
$action->run(); |
| 336 |
break; |
| 337 |
} |
| 338 |
} |
| 339 |
|
| 340 |
// We will only get here if there is no match (check $this->matched) or the action does not result in redirecting away |
| 341 |
do_action( 'redirection_last', $request->get_decoded_url(), $this, $redirects ); |
| 342 |
|
| 343 |
if ( ! $this->matched ) { |
| 344 |
// Keep them for later |
| 345 |
$this->redirects = $redirects; |
| 346 |
} |
| 347 |
} |
| 348 |
} |
| 349 |
|
| 350 |
/** |
| 351 |
* Fix for incorrect headers sent when using FastCGI/IIS |
| 352 |
* |
| 353 |
* @param string $status HTTP status line. |
| 354 |
* @return string |
| 355 |
*/ |
| 356 |
public function status_header( $status ) { |
| 357 |
if ( substr( php_sapi_name(), 0, 3 ) === 'cgi' ) { |
| 358 |
return str_replace( 'HTTP/1.1', 'Status:', $status ); |
| 359 |
} |
| 360 |
|
| 361 |
return $status; |
| 362 |
} |
| 363 |
|
| 364 |
/** |
| 365 |
* Add any custom HTTP headers to the response. |
| 366 |
* |
| 367 |
* @param array $obj Some object. |
| 368 |
* @return void |
| 369 |
*/ |
| 370 |
public function send_headers( $obj ) { |
| 371 |
if ( ! empty( $this->matched ) && $this->matched->action && $this->matched->action->get_code() === 410 ) { |
| 372 |
add_filter( 'status_header', [ $this, 'set_header_410' ] ); |
| 373 |
} |
| 374 |
|
| 375 |
// Add any custom headers |
| 376 |
$options = red_get_options(); |
| 377 |
$headers = new Red_Http_Headers( $options['headers'] ); |
| 378 |
$headers->run( $headers->get_site_headers() ); |
| 379 |
} |
| 380 |
|
| 381 |
/** |
| 382 |
* Add support for a 410 response. |
| 383 |
* |
| 384 |
* @return string |
| 385 |
*/ |
| 386 |
public function set_header_410() { |
| 387 |
return 'HTTP/1.1 410 Gone'; |
| 388 |
} |
| 389 |
|
| 390 |
/** |
| 391 |
* IIS fix. Don't know if this is still needed |
| 392 |
* |
| 393 |
* @param string $url URL. |
| 394 |
* @return void |
| 395 |
*/ |
| 396 |
private function iis_fix( $url ) { |
| 397 |
global $is_IIS; |
| 398 |
|
| 399 |
if ( $is_IIS ) { |
| 400 |
header( "Refresh: 0;url=$url" ); |
| 401 |
} |
| 402 |
} |
| 403 |
|
| 404 |
/** |
| 405 |
* Don't know if this is still needed |
| 406 |
* |
| 407 |
* @param string $url URL. |
| 408 |
* @param integer $status HTTP status code. |
| 409 |
* @return void |
| 410 |
*/ |
| 411 |
private function cgi_fix( $url, $status ) { |
| 412 |
if ( $status === 301 && php_sapi_name() === 'cgi-fcgi' ) { |
| 413 |
$servers_to_check = [ 'lighttpd', 'nginx' ]; |
| 414 |
$server = ''; |
| 415 |
if ( isset( $_SERVER['SERVER_SOFTWARE'] ) && is_string( $_SERVER['SERVER_SOFTWARE'] ) ) { |
| 416 |
$server = sanitize_text_field( $_SERVER['SERVER_SOFTWARE'] ); |
| 417 |
} |
| 418 |
|
| 419 |
foreach ( $servers_to_check as $name ) { |
| 420 |
|
| 421 |
if ( stripos( $server, $name ) !== false ) { |
| 422 |
status_header( $status ); |
| 423 |
header( "Location: $url" ); |
| 424 |
exit( 0 ); |
| 425 |
} |
| 426 |
} |
| 427 |
} |
| 428 |
} |
| 429 |
|
| 430 |
/** |
| 431 |
* Get a 'source' for a redirect by digging through the backtrace. |
| 432 |
* |
| 433 |
* @return string[] |
| 434 |
*/ |
| 435 |
private function get_redirect_source() { |
| 436 |
$ignore = [ |
| 437 |
'WP_Hook', |
| 438 |
'template-loader.php', |
| 439 |
'wp-blog-header.php', |
| 440 |
]; |
| 441 |
|
| 442 |
// phpcs:ignore |
| 443 |
$source = wp_debug_backtrace_summary( null, 5, false ); |
| 444 |
|
| 445 |
return array_filter( $source, function( $item ) use ( $ignore ) { |
| 446 |
foreach ( $ignore as $ignore_item ) { |
| 447 |
if ( strpos( $item, $ignore_item ) !== false ) { |
| 448 |
return false; |
| 449 |
} |
| 450 |
} |
| 451 |
|
| 452 |
return true; |
| 453 |
} ); |
| 454 |
} |
| 455 |
|
| 456 |
/** |
| 457 |
* Record a redirect. |
| 458 |
* |
| 459 |
* @param string $agent Redirect agent. |
| 460 |
* @return string |
| 461 |
*/ |
| 462 |
public function record_redirect_by( $agent ) { |
| 463 |
// Have we already redirected with Redirection? |
| 464 |
if ( $this->matched || $agent === 'redirection' ) { |
| 465 |
return $agent; |
| 466 |
} |
| 467 |
|
| 468 |
$options = red_get_options(); |
| 469 |
|
| 470 |
if ( ! $options['log_external'] ) { |
| 471 |
return $agent; |
| 472 |
} |
| 473 |
|
| 474 |
$details = [ |
| 475 |
'target' => $this->redirect_url, |
| 476 |
'agent' => Redirection_Request::get_user_agent(), |
| 477 |
'referrer' => Redirection_Request::get_referrer(), |
| 478 |
'request_method' => Redirection_Request::get_request_method(), |
| 479 |
'redirect_by' => $agent ? $agent : 'wordpress', |
| 480 |
'http_code' => $this->redirect_code, |
| 481 |
'request_data' => [ |
| 482 |
'source' => array_values( $this->get_redirect_source() ), |
| 483 |
], |
| 484 |
]; |
| 485 |
|
| 486 |
if ( $options['log_header'] ) { |
| 487 |
$details['request_data']['headers'] = Redirection_Request::get_request_headers(); |
| 488 |
} |
| 489 |
|
| 490 |
Red_Redirect_Log::create( Redirection_Request::get_server(), Redirection_Request::get_request_url(), Redirection_Request::get_ip(), $details ); |
| 491 |
|
| 492 |
return $agent; |
| 493 |
} |
| 494 |
|
| 495 |
/** |
| 496 |
* Perform any pre-redirect processing, such as logging and header fixing. |
| 497 |
* |
| 498 |
* @param string $url Target URL. |
| 499 |
* @param integer $status HTTP status. |
| 500 |
* @return string |
| 501 |
*/ |
| 502 |
public function wp_redirect( $url, $status = 302 ) { |
| 503 |
global $wp_version; |
| 504 |
|
| 505 |
$this->redirect_url = $url; |
| 506 |
$this->redirect_code = $status; |
| 507 |
|
| 508 |
$this->iis_fix( $url ); |
| 509 |
$this->cgi_fix( $url, $status ); |
| 510 |
|
| 511 |
if ( intval( $status, 10 ) === 307 ) { |
| 512 |
status_header( $status ); |
| 513 |
nocache_headers(); |
| 514 |
return $url; |
| 515 |
} |
| 516 |
|
| 517 |
$options = red_get_options(); |
| 518 |
$headers = new Red_Http_Headers( $options['headers'] ); |
| 519 |
$headers->run( $headers->get_redirect_headers() ); |
| 520 |
|
| 521 |
// Do we need to set the cache header? |
| 522 |
if ( ! headers_sent() && isset( $options['redirect_cache'] ) && $options['redirect_cache'] !== 0 && intval( $status, 10 ) === 301 ) { |
| 523 |
if ( $options['redirect_cache'] === -1 ) { |
| 524 |
// No cache - just use WP function |
| 525 |
nocache_headers(); |
| 526 |
} else { |
| 527 |
// Custom cache |
| 528 |
header( 'Expires: ' . gmdate( 'D, d M Y H:i:s T', time() + $options['redirect_cache'] * 60 * 60 ) ); |
| 529 |
header( 'Cache-Control: max-age=' . $options['redirect_cache'] * 60 * 60 ); |
| 530 |
} |
| 531 |
} |
| 532 |
|
| 533 |
status_header( $status ); |
| 534 |
return $url; |
| 535 |
} |
| 536 |
|
| 537 |
/** |
| 538 |
* Reset the module. Used for unit tests |
| 539 |
* |
| 540 |
* @param Red_Item|false $matched Set the `matched` var. |
| 541 |
* @return void |
| 542 |
*/ |
| 543 |
public function reset( $matched = false ) { |
| 544 |
$this->can_log = true; |
| 545 |
$this->matched = $matched; |
| 546 |
} |
| 547 |
|
| 548 |
/** |
| 549 |
* Can we log a redirect? |
| 550 |
* |
| 551 |
* @return boolean |
| 552 |
*/ |
| 553 |
public function can_log() { |
| 554 |
return apply_filters( 'redirection_log_404', $this->can_log ); |
| 555 |
} |
| 556 |
} |
| 557 |
|
