| 1 |
<?php |
| 2 |
/** |
| 3 |
* Forked from https://github.com/tlovett1/simple-cache/ |
| 4 |
*/ |
| 5 |
|
| 6 |
defined( 'ABSPATH' ) || exit; |
| 7 |
|
| 8 |
$powered_cache_start_time = microtime( true ); |
| 9 |
|
| 10 |
// Don't cache robots.txt or htacesss |
| 11 |
if ( strpos( $_SERVER['REQUEST_URI'], 'robots.txt' ) !== false || strpos( $_SERVER['REQUEST_URI'], '.htaccess' ) !== false ) { |
| 12 |
powered_cache_add_cache_miss_header( "Uncacheable file" ); |
| 13 |
|
| 14 |
return; |
| 15 |
} |
| 16 |
|
| 17 |
// Don't cache non-GET requests |
| 18 |
if ( ! isset( $_SERVER['REQUEST_METHOD'] ) || 'GET' !== $_SERVER['REQUEST_METHOD'] ) { |
| 19 |
powered_cache_add_cache_miss_header( "Invalid request method" ); |
| 20 |
|
| 21 |
return; |
| 22 |
} |
| 23 |
|
| 24 |
if ( ! isset( $_SERVER['HTTP_USER_AGENT'] ) ) { |
| 25 |
$_SERVER['HTTP_USER_AGENT'] = ''; |
| 26 |
} |
| 27 |
|
| 28 |
// Don't cache wp-admin |
| 29 |
if ( is_admin() ) { |
| 30 |
return; |
| 31 |
} |
| 32 |
|
| 33 |
$file_extension = $_SERVER['REQUEST_URI']; |
| 34 |
$file_extension = preg_replace( '#^(.*?)\?.*$#', '$1', $file_extension ); |
| 35 |
$file_extension = trim( preg_replace( '#^.*\.(.*)$#', '$1', $file_extension ) ); |
| 36 |
|
| 37 |
// Don't cache disallowed extensions. Prevents wp-cron.php, xmlrpc.php, etc. |
| 38 |
if ( ! preg_match( '#index\.php$#i', $_SERVER['REQUEST_URI'] ) && in_array( $file_extension, array( 'php', 'xml', 'xsl' ), true ) ) { |
| 39 |
powered_cache_add_cache_miss_header( "Disallowed file extension" ); |
| 40 |
|
| 41 |
return; |
| 42 |
} |
| 43 |
|
| 44 |
if ( ! $GLOBALS['powered_cache_options']['enable_page_cache'] ) { |
| 45 |
powered_cache_add_cache_miss_header( "Page Caching is not enabled" ); |
| 46 |
|
| 47 |
return; |
| 48 |
} |
| 49 |
|
| 50 |
// Don't cache page with these user agents |
| 51 |
if ( isset( $powered_cache_rejected_user_agents ) && ! empty( $powered_cache_rejected_user_agents ) ) { |
| 52 |
$rejected_user_agents = implode( '|', $powered_cache_rejected_user_agents ); |
| 53 |
if ( ! empty( $rejected_user_agents ) && isset( $_SERVER['HTTP_USER_AGENT'] ) && preg_match( '#(' . $rejected_user_agents . ')#', $_SERVER['HTTP_USER_AGENT'] ) ) { |
| 54 |
powered_cache_add_cache_miss_header( "Rejected user agent" ); |
| 55 |
|
| 56 |
return; |
| 57 |
} |
| 58 |
} |
| 59 |
|
| 60 |
// dont cache mobile |
| 61 |
if ( empty( $GLOBALS['powered_cache_options']['cache_mobile'] ) ) { |
| 62 |
global $powered_cache_mobile_browsers, $powered_cache_mobile_prefixes; |
| 63 |
|
| 64 |
$mobile_browsers = addcslashes( implode( '|', preg_split( '/[\s*,\s*]*,+[\s*,\s*]*/', $powered_cache_mobile_browsers ) ), ' ' ); |
| 65 |
$mobile_prefixes = addcslashes( implode( '|', preg_split( '/[\s*,\s*]*,+[\s*,\s*]*/', $powered_cache_mobile_prefixes ) ), ' ' ); |
| 66 |
// Don't cache if mobile detection is activated |
| 67 |
if ( ( preg_match( '#^.*(' . $mobile_browsers . ').*#i', $_SERVER['HTTP_USER_AGENT'] ) || preg_match( '#^(' . $mobile_prefixes . ').*#i', substr( $_SERVER['HTTP_USER_AGENT'], 0, 4 ) ) ) ) { |
| 68 |
powered_cache_add_cache_miss_header( "Mobile request" ); |
| 69 |
|
| 70 |
return; |
| 71 |
} |
| 72 |
} |
| 73 |
|
| 74 |
|
| 75 |
if ( ! empty( $_COOKIE ) ) { |
| 76 |
$wp_cookies = array( 'wordpressuser_', 'wordpresspass_', 'wordpress_sec_', 'wordpress_logged_in_' ); |
| 77 |
|
| 78 |
//Don't cache if logged in |
| 79 |
if ( ! isset( $GLOBALS['powered_cache_options']['loggedin_user_cache'] ) || false === $GLOBALS['powered_cache_options']['loggedin_user_cache'] ) { |
| 80 |
// check logged-in cookie |
| 81 |
foreach ( $_COOKIE as $key => $value ) { |
| 82 |
foreach ( $wp_cookies as $cookie ) { |
| 83 |
if ( strpos( $key, $cookie ) !== false ) { |
| 84 |
// Logged in! |
| 85 |
powered_cache_add_cache_miss_header( "User logged-in" ); |
| 86 |
|
| 87 |
return; |
| 88 |
} |
| 89 |
} |
| 90 |
} |
| 91 |
} |
| 92 |
|
| 93 |
|
| 94 |
if ( ! empty( $_COOKIE['powered_cache_commented_posts'] ) ) { |
| 95 |
foreach ( $_COOKIE['powered_cache_commented_posts'] as $path ) { |
| 96 |
if ( rtrim( $path, '/' ) === rtrim( $_SERVER['REQUEST_URI'], '/' ) ) { |
| 97 |
// User commented on this post |
| 98 |
powered_cache_add_cache_miss_header( "User commented" ); |
| 99 |
|
| 100 |
return; |
| 101 |
} |
| 102 |
} |
| 103 |
} |
| 104 |
|
| 105 |
// don't cache specific cookie |
| 106 |
if ( isset( $powered_cache_rejected_cookies ) && ! empty( $powered_cache_rejected_cookies ) ) { |
| 107 |
$rejected_cookies = array_diff( $powered_cache_rejected_cookies, $wp_cookies ); // use diff in case caching for logged-in user |
| 108 |
$rejected_cookies = implode( '|', $rejected_cookies ); |
| 109 |
if ( preg_match( '#(' . $rejected_cookies . ')#', var_export( $_COOKIE, true ) ) ) { |
| 110 |
powered_cache_add_cache_miss_header( "Rejected cookie" ); |
| 111 |
|
| 112 |
return; |
| 113 |
} |
| 114 |
} |
| 115 |
} |
| 116 |
|
| 117 |
// Don't cache rejected pages |
| 118 |
if ( ! empty( $powered_cache_rejected_uri ) ) { |
| 119 |
foreach ( (array) $powered_cache_rejected_uri as $exception ) { |
| 120 |
if ( preg_match( '#^[\s]*$#', $exception ) ) { |
| 121 |
continue; |
| 122 |
} |
| 123 |
|
| 124 |
// full url exception |
| 125 |
if ( preg_match( '#^https?://#', $exception ) ) { |
| 126 |
$exception = parse_url( $exception, PHP_URL_PATH ); |
| 127 |
} |
| 128 |
|
| 129 |
if ( empty( $exception ) ) { |
| 130 |
continue; |
| 131 |
} |
| 132 |
|
| 133 |
if ( preg_match( '#^(' . $exception . ')$#', $_SERVER['REQUEST_URI'] ) ) { |
| 134 |
powered_cache_add_cache_miss_header( "Rejected page" ); |
| 135 |
|
| 136 |
return; |
| 137 |
} |
| 138 |
} |
| 139 |
} |
| 140 |
|
| 141 |
|
| 142 |
if ( ! empty( $_GET ) ) { |
| 143 |
if ( ! isset( $powered_cache_accepted_query_strings ) ) { |
| 144 |
$powered_cache_accepted_query_strings = []; |
| 145 |
} |
| 146 |
|
| 147 |
$query_params = array_diff_key( $_GET, array_flip( $powered_cache_accepted_query_strings ) ); |
| 148 |
|
| 149 |
// don't cache when there is not allowed query parameter exists |
| 150 |
if ( ! empty( $query_params ) ) { |
| 151 |
powered_cache_add_cache_miss_header( "Disallowed query parameter exists" ); |
| 152 |
|
| 153 |
return; |
| 154 |
} |
| 155 |
} |
| 156 |
|
| 157 |
powered_cache_serve_cache(); |
| 158 |
|
| 159 |
ob_start( 'powered_cache_page_buffer' ); |
| 160 |
|
| 161 |
/** |
| 162 |
* Cache output before it goes to the browser |
| 163 |
* |
| 164 |
* @param string $buffer |
| 165 |
* @param int $flags |
| 166 |
* |
| 167 |
* @return string |
| 168 |
* @since 1.0 |
| 169 |
*/ |
| 170 |
function powered_cache_page_buffer( $buffer, $flags ) { |
| 171 |
global $powered_cache_start_time, $post; |
| 172 |
|
| 173 |
if ( strlen( $buffer ) < 255 ) { |
| 174 |
return $buffer; |
| 175 |
} |
| 176 |
|
| 177 |
// Don't cache search, 404, or password protected |
| 178 |
if ( is_404() || is_search() || ! empty( $post->post_password ) ) { |
| 179 |
powered_cache_add_cache_miss_header( "404, search results or password protected posts are not cached" ); |
| 180 |
|
| 181 |
return $buffer; |
| 182 |
} |
| 183 |
|
| 184 |
// maybe we shouldn't cache template file has this constant |
| 185 |
// dont check DONOTCACHEPAGE strictly some plugins define string instead bool flag |
| 186 |
if ( defined( 'DONOTCACHEPAGE' ) && DONOTCACHEPAGE ) { |
| 187 |
\PoweredCache\Utils\log( sprintf( 'DONOTCACHEPAGE DEFINED on %s', $_SERVER['REQUEST_URI'] ) ); |
| 188 |
powered_cache_add_cache_miss_header( "DONOTCACHEPAGE defined" ); |
| 189 |
|
| 190 |
return $buffer; |
| 191 |
} |
| 192 |
|
| 193 |
/** |
| 194 |
* Filter whether to enable page cache for this request |
| 195 |
* |
| 196 |
* @hook powered_cache_page_cache_enable |
| 197 |
* |
| 198 |
* @param {boolean} $enable true for caching |
| 199 |
* |
| 200 |
* @since 1.0 |
| 201 |
*/ |
| 202 |
if ( true !== apply_filters( 'powered_cache_page_cache_enable', true ) ) { |
| 203 |
powered_cache_add_cache_miss_header( "Page Cache not enabled for this post" ); |
| 204 |
|
| 205 |
return $buffer; |
| 206 |
} |
| 207 |
|
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// only cache when http ok |
| 209 |
if ( 200 !== http_response_code() ) { |
| 210 |
powered_cache_add_cache_miss_header( "Response code is not 200" ); |
| 211 |
|
| 212 |
return $buffer; |
| 213 |
} |
| 214 |
|
| 215 |
if ( ! function_exists( '\PoweredCache\Utils\get_cache_dir' ) ) { |
| 216 |
return $buffer; |
| 217 |
} |
| 218 |
|
| 219 |
// Make sure we can read/write files and that proper folders exist |
| 220 |
if ( ! file_exists( untrailingslashit( \PoweredCache\Utils\get_cache_dir() ) ) ) { |
| 221 |
if ( ! @mkdir( untrailingslashit( \PoweredCache\Utils\get_cache_dir() ) ) ) { |
| 222 |
// Can not cache! |
| 223 |
powered_cache_add_cache_miss_header( "The cache directory does not exist for storing cached output" ); |
| 224 |
|
| 225 |
return $buffer; |
| 226 |
} |
| 227 |
} |
| 228 |
|
| 229 |
if ( ! file_exists( \PoweredCache\Utils\get_page_cache_dir() ) ) { |
| 230 |
if ( ! @mkdir( \PoweredCache\Utils\get_page_cache_dir() ) ) { |
| 231 |
// Can not cache! |
| 232 |
powered_cache_add_cache_miss_header( "The page cache directory does not exist for storing cached output" ); |
| 233 |
|
| 234 |
return $buffer; |
| 235 |
} |
| 236 |
} |
| 237 |
|
| 238 |
/** |
| 239 |
* Filters HTML buffer |
| 240 |
* |
| 241 |
* @hook powered_cache_page_caching_buffer |
| 242 |
* |
| 243 |
* @param {string} $buffer Output buffer. |
| 244 |
* |
| 245 |
* @return {string} New value. |
| 246 |
* @since 1.0 |
| 247 |
*/ |
| 248 |
$buffer = apply_filters( 'powered_cache_page_caching_buffer', $buffer ); |
| 249 |
|
| 250 |
$url_path = powered_cache_get_url_path(); |
| 251 |
|
| 252 |
$dirs = explode( '/', $url_path ); |
| 253 |
|
| 254 |
$path = untrailingslashit( \PoweredCache\Utils\get_page_cache_dir() ); |
| 255 |
|
| 256 |
foreach ( $dirs as $dir ) { |
| 257 |
if ( ! empty( $dir ) ) { |
| 258 |
$path .= '/' . $dir; |
| 259 |
|
| 260 |
if ( ! file_exists( $path ) ) { |
| 261 |
if ( ! @mkdir( $path ) ) { |
| 262 |
// Can not cache! |
| 263 |
return $buffer; |
| 264 |
} |
| 265 |
} |
| 266 |
} |
| 267 |
} |
| 268 |
|
| 269 |
$modified_time = time(); // Make sure modified time is consistent |
| 270 |
$generation_time = number_format( microtime( true ) - $powered_cache_start_time, 3 ); |
| 271 |
|
| 272 |
$home_url = get_home_url(); |
| 273 |
// prevent mixed content |
| 274 |
if ( ! is_ssl() && 'https' === strtolower( parse_url( $home_url, PHP_URL_SCHEME ) ) ) { |
| 275 |
$https_home_url = $home_url; |
| 276 |
$http_home_url = str_replace( 'https://', 'http://', $https_home_url ); |
| 277 |
$buffer = str_replace( esc_url( $http_home_url ), esc_url( $https_home_url ), $buffer ); |
| 278 |
} |
| 279 |
|
| 280 |
if ( array_key_exists( 'cache_footprint', $GLOBALS['powered_cache_options'] ) && true === $GLOBALS['powered_cache_options']['cache_footprint'] ) { |
| 281 |
if ( preg_match( '#</html>#i', $buffer ) ) { |
| 282 |
$buffer .= PHP_EOL; |
| 283 |
$buffer .= "<!-- Cache served by PoweredCache -->"; |
| 284 |
$buffer .= PHP_EOL; |
| 285 |
$buffer .= "<!-- If you like fast websites like this, visit: https://poweredcache.com -->"; |
| 286 |
$buffer .= PHP_EOL; |
| 287 |
$buffer .= "<!-- Last modified: " . gmdate( 'D, d M Y H:i:s', $modified_time ) . " GMT -->"; |
| 288 |
$buffer .= PHP_EOL; |
| 289 |
$buffer .= "<!-- Dynamic page generated in $generation_time -->"; |
| 290 |
$buffer .= PHP_EOL; |
| 291 |
} |
| 292 |
} |
| 293 |
|
| 294 |
|
| 295 |
$meta_file_name = 'meta.php'; |
| 296 |
$meta_file = '<?php exit; ?>' . PHP_EOL; |
| 297 |
|
| 298 |
$meta_params = array(); // holds to metadata for cached file |
| 299 |
|
| 300 |
$response_headers = \PoweredCache\Utils\get_response_headers(); |
| 301 |
|
| 302 |
foreach ( (array) $response_headers as $key => $value ) { |
| 303 |
$meta_params['headers'][ $key ] = "$key: $value"; |
| 304 |
} |
| 305 |
|
| 306 |
/** |
| 307 |
* Filters meta parameters. |
| 308 |
* |
| 309 |
* @hook powered_cache_page_cache_meta_params |
| 310 |
* |
| 311 |
* @param {array} $meta_params Meta parameters. |
| 312 |
* @param {array} $response_headers Supported response header list. |
| 313 |
* |
| 314 |
* @return {array} New value. |
| 315 |
* @since 1.2 |
| 316 |
*/ |
| 317 |
$meta_params = apply_filters( 'powered_cache_page_cache_meta_params', $meta_params, $response_headers ); |
| 318 |
$meta_file_contents = $meta_file . json_encode( $meta_params ); |
| 319 |
|
| 320 |
/** |
| 321 |
* Filters meta file contents. |
| 322 |
* |
| 323 |
* @hook powered_cache_page_cache_meta_info |
| 324 |
* |
| 325 |
* @param {string} $meta_file_contents The content of the meta file.* |
| 326 |
* |
| 327 |
* @return {array} New value. |
| 328 |
* @since 1.2 |
| 329 |
*/ |
| 330 |
$meta_file_contents = apply_filters( 'powered_cache_page_cache_meta_info', $meta_file_contents ); |
| 331 |
|
| 332 |
file_put_contents( $path . '/' . $meta_file_name, $meta_file_contents ); |
| 333 |
touch( $path . '/' . $meta_file_name, $modified_time ); |
| 334 |
|
| 335 |
if ( ! empty( $meta_params['headers']['Content-Type'] ) ) { |
| 336 |
$index_name = powered_cache_index_file( $meta_params['headers']['Content-Type'] ); |
| 337 |
} else { |
| 338 |
$index_name = powered_cache_index_file(); |
| 339 |
} |
| 340 |
|
| 341 |
if ( $GLOBALS['powered_cache_options']['gzip_compression'] && function_exists( 'gzencode' ) ) { |
| 342 |
file_put_contents( $path . '/' . $index_name, gzencode( $buffer, 3 ) ); |
| 343 |
touch( $path . '/' . $index_name, $modified_time ); |
| 344 |
} else { |
| 345 |
file_put_contents( $path . '/' . $index_name, $buffer ); |
| 346 |
touch( $path . '/' . $index_name, $modified_time ); |
| 347 |
} |
| 348 |
|
| 349 |
/** |
| 350 |
* Fires after caching a page. |
| 351 |
* |
| 352 |
* @hook powered_cache_page_cached |
| 353 |
* |
| 354 |
* @param {string} $buffer HTML Output. |
| 355 |
* |
| 356 |
* @since 1.0 |
| 357 |
*/ |
| 358 |
do_action( 'powered_cache_page_cached', $buffer ); |
| 359 |
|
| 360 |
header( 'Cache-Control: no-cache' ); // Check back every time to see if re-download is necessary |
| 361 |
|
| 362 |
header( 'X-Powered-Cache: MISS' ); |
| 363 |
|
| 364 |
header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', $modified_time ) . ' GMT' ); |
| 365 |
|
| 366 |
if ( function_exists( 'ob_gzhandler' ) && $GLOBALS['powered_cache_options']['gzip_compression'] ) { |
| 367 |
return ob_gzhandler( $buffer, $flags ); |
| 368 |
} else { |
| 369 |
return $buffer; |
| 370 |
} |
| 371 |
} |
| 372 |
|
| 373 |
|
| 374 |
/** |
| 375 |
* Optionally serve cache and exit |
| 376 |
* |
| 377 |
* @since 1.0 |
| 378 |
*/ |
| 379 |
function powered_cache_serve_cache() { |
| 380 |
global $powered_cache_slash_check; |
| 381 |
|
| 382 |
$path = rtrim( $GLOBALS['powered_cache_options']['cache_location'], '/' ) . '/powered-cache/' . rtrim( powered_cache_get_url_path(), '/' ) . '/'; |
| 383 |
|
| 384 |
$meta_file = $path . '/meta.php'; |
| 385 |
|
| 386 |
$header_params = []; |
| 387 |
$content_type = 'text/html'; |
| 388 |
|
| 389 |
if ( @file_exists( $meta_file ) ) { |
| 390 |
$meta_contents = trim( file_get_contents( $meta_file ) ); |
| 391 |
$meta_contents = str_replace( '<?php exit; ?>', '', $meta_contents ); |
| 392 |
$meta_params = json_decode( trim( $meta_contents ), true ); |
| 393 |
$header_params = $meta_params['headers']; |
| 394 |
} |
| 395 |
|
| 396 |
if ( ! empty( $header_params['Content-Type'] ) ) { |
| 397 |
$content_type = $header_params['Content-Type']; |
| 398 |
} |
| 399 |
|
| 400 |
|
| 401 |
$file_name = powered_cache_index_file( $content_type ); |
| 402 |
$file_path = $path . $file_name; |
| 403 |
|
| 404 |
// check file exists? |
| 405 |
if ( ! file_exists( $file_path ) ) { |
| 406 |
return; |
| 407 |
} |
| 408 |
|
| 409 |
$modified_time = (int) @filemtime( $file_path ); |
| 410 |
|
| 411 |
header( 'Cache-Control: no-cache' ); // Check back in an hour |
| 412 |
|
| 413 |
if ( ! empty( $modified_time ) && ! empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) && strtotime( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) === $modified_time ) { |
| 414 |
header( $_SERVER['SERVER_PROTOCOL'] . ' 304 Not Modified', true, 304 ); |
| 415 |
exit; |
| 416 |
} |
| 417 |
|
| 418 |
// trailingslash check |
| 419 |
if ( isset( $powered_cache_slash_check ) && $powered_cache_slash_check ) { |
| 420 |
$current_path = parse_url( $_SERVER['REQUEST_URI'], PHP_URL_PATH ); |
| 421 |
if ( ! empty( $current_path ) && '/' !== substr( $current_path, - 1 ) ) { |
| 422 |
header( 'X-Powered-Cache: Passing to WordPress' ); |
| 423 |
|
| 424 |
return; |
| 425 |
} |
| 426 |
} |
| 427 |
|
| 428 |
if ( @file_exists( $file_path ) && @is_readable( $file_path ) ) { |
| 429 |
|
| 430 |
if ( ! empty( $header_params ) ) { |
| 431 |
foreach ( $header_params as $key => $response_header ) { |
| 432 |
header( $response_header ); |
| 433 |
} |
| 434 |
} |
| 435 |
|
| 436 |
header( 'X-Powered-Cache: PHP' ); |
| 437 |
|
| 438 |
if ( function_exists( 'gzencode' ) && $GLOBALS['powered_cache_options']['gzip_compression'] ) { |
| 439 |
header( 'Content-Encoding: gzip' ); |
| 440 |
} |
| 441 |
|
| 442 |
@readfile( $file_path ); |
| 443 |
|
| 444 |
exit; |
| 445 |
} |
| 446 |
} |
| 447 |
|
| 448 |
/** |
| 449 |
* Get URL path for caching |
| 450 |
* |
| 451 |
* @return string |
| 452 |
* @since 1.0 |
| 453 |
* @since 2.0 $request_uri without query string |
| 454 |
*/ |
| 455 |
function powered_cache_get_url_path() { |
| 456 |
$host = ( isset( $_SERVER['HTTP_HOST'] ) ? $_SERVER['HTTP_HOST'] : '' ); |
| 457 |
$request_uri = explode( '?', $_SERVER['REQUEST_URI'] ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized |
| 458 |
$request_uri = reset( $request_uri ); |
| 459 |
$request_uri = preg_replace( '/(\/+)/', '/', $request_uri ); |
| 460 |
$request_uri = str_replace( '..', '', preg_replace( '/[ <>\'\"\r\n\t\(\)]/', '', $request_uri ) ); |
| 461 |
|
| 462 |
return rtrim( $host, '/' ) . $request_uri; |
| 463 |
} |
| 464 |
|
| 465 |
function powered_cache_get_user_cookie() { |
| 466 |
if ( empty( $_COOKIE ) ) { |
| 467 |
return false; |
| 468 |
} |
| 469 |
|
| 470 |
foreach ( $_COOKIE as $c_key => $val ) { |
| 471 |
if ( false !== strpos( $c_key, 'wordpress_logged_in_' ) ) { |
| 472 |
return $val; |
| 473 |
} |
| 474 |
} |
| 475 |
|
| 476 |
return false; |
| 477 |
} |
| 478 |
|
| 479 |
|
| 480 |
/** |
| 481 |
* Determines cache file names |
| 482 |
* |
| 483 |
* @param string $content_type |
| 484 |
* |
| 485 |
* @return string |
| 486 |
* @since 1.2 `$content_type` |
| 487 |
* @since 1.0 |
| 488 |
*/ |
| 489 |
function powered_cache_index_file( $content_type = 'text/html' ) { |
| 490 |
global $powered_cache_mobile_browsers, $powered_cache_mobile_prefixes, $powered_cache_vary_cookies; |
| 491 |
|
| 492 |
$file_name = 'index'; |
| 493 |
|
| 494 |
if ( is_ssl() ) { |
| 495 |
$file_name .= '-https'; |
| 496 |
} |
| 497 |
|
| 498 |
// separate file for mobile cache |
| 499 |
if ( ! empty( $GLOBALS['powered_cache_options']['cache_mobile'] ) && ! empty( $GLOBALS['powered_cache_options']['cache_mobile_separate_file'] ) ) { |
| 500 |
$mobile_browsers = addcslashes( implode( '|', preg_split( '/[\s*,\s*]*,+[\s*,\s*]*/', $powered_cache_mobile_browsers ) ), ' ' ); |
| 501 |
$mobile_prefixes = addcslashes( implode( '|', preg_split( '/[\s*,\s*]*,+[\s*,\s*]*/', $powered_cache_mobile_prefixes ) ), ' ' ); |
| 502 |
|
| 503 |
// Don't cache if mobile detection is activated |
| 504 |
if ( ( preg_match( '#^.*(' . $mobile_browsers . ').*#i', $_SERVER['HTTP_USER_AGENT'] ) || preg_match( '#^(' . $mobile_prefixes . ').*#i', substr( $_SERVER['HTTP_USER_AGENT'], 0, 4 ) ) ) ) { |
| 505 |
$file_name .= '-mobile'; |
| 506 |
} |
| 507 |
} |
| 508 |
|
| 509 |
if ( ! empty( $GLOBALS['powered_cache_options']['loggedin_user_cache'] ) ) { |
| 510 |
$usr_cookie = powered_cache_get_user_cookie(); |
| 511 |
if ( false !== $usr_cookie ) { |
| 512 |
$cookie_info = explode( '|', $usr_cookie ); |
| 513 |
|
| 514 |
// user specific cache dir |
| 515 |
$file_name .= '_' . $cookie_info[0] . '-' . $cookie_info[1]; |
| 516 |
} |
| 517 |
} |
| 518 |
|
| 519 |
// change filename based on vary cookies |
| 520 |
if ( ! empty( $powered_cache_vary_cookies ) ) { |
| 521 |
$cookie_file_name = ''; |
| 522 |
foreach ( $powered_cache_vary_cookies as $key => $vary_cookie ) { |
| 523 |
if ( is_array( $vary_cookie ) ) { |
| 524 |
if ( ! empty( $_COOKIE[ $key ] ) ) { |
| 525 |
foreach ( $vary_cookie as $vary_sub_cookie ) { |
| 526 |
if ( isset( $_COOKIE[ $key ][ $vary_sub_cookie ] ) ) { |
| 527 |
$cookie_value = preg_replace( '/[^A-Za-z0-9. -]/', '', $_COOKIE[ $key ][ $vary_sub_cookie ] ); |
| 528 |
$cookie_file_name .= strtolower( $key . $vary_sub_cookie . $cookie_value ); |
| 529 |
} |
| 530 |
} |
| 531 |
} |
| 532 |
|
| 533 |
continue; |
| 534 |
} |
| 535 |
|
| 536 |
if ( isset( $_COOKIE[ $vary_cookie ] ) && ! empty( $_COOKIE[ $vary_cookie ] ) ) { |
| 537 |
$cookie_value = preg_replace( '/[^A-Za-z0-9. -]/', '', $_COOKIE[ $vary_cookie ] ); |
| 538 |
$cookie_file_name .= strtolower( $vary_cookie . $cookie_value ); |
| 539 |
} |
| 540 |
} |
| 541 |
|
| 542 |
if ( ! empty( $cookie_file_name ) ) { |
| 543 |
/** |
| 544 |
* Hashing for no particular reason |
| 545 |
* preg_replace( '/[^a-z0-9_\-]/', '', strtolower( $cookie_file_name ) ) |
| 546 |
* can create a messy filename |
| 547 |
*/ |
| 548 |
$file_name .= '-' . sha1( $cookie_file_name ); |
| 549 |
} |
| 550 |
|
| 551 |
} |
| 552 |
|
| 553 |
|
| 554 |
/** |
| 555 |
* Content-Type is not always text/html (like feed, wp-json etc..) |
| 556 |
* Adding hash by simply escaping from rewrite matches in htaccess or nginx |
| 557 |
* Different types of content should be serve via PHP, in order to restore header info |
| 558 |
*/ |
| 559 |
if ( false === strpos( $content_type, 'text/html' ) ) { |
| 560 |
$file_name .= '-' . substr( sha1( $content_type ), 0, 6 ); |
| 561 |
} |
| 562 |
|
| 563 |
$file_name .= '.html'; |
| 564 |
|
| 565 |
if ( function_exists( 'gzencode' ) && $GLOBALS['powered_cache_options']['gzip_compression'] ) { |
| 566 |
$file_name .= '.gz'; |
| 567 |
} |
| 568 |
|
| 569 |
return $file_name; |
| 570 |
} |
| 571 |
|
| 572 |
/** |
| 573 |
* Add cache miss header and reason |
| 574 |
* |
| 575 |
* @param string $reason Cache Miss info |
| 576 |
* |
| 577 |
* @since 2.2 |
| 578 |
*/ |
| 579 |
function powered_cache_add_cache_miss_header( $reason ) { |
| 580 |
if ( headers_sent() ) { |
| 581 |
return; |
| 582 |
} |
| 583 |
|
| 584 |
header( 'X-Powered-Cache: MISS' ); |
| 585 |
|
| 586 |
if ( ( defined( 'POWERED_CACHE_ENABLE_LOG' ) && POWERED_CACHE_ENABLE_LOG ) |
| 587 |
|| ( defined( 'POWERED_CACHE_MISS_REASON' ) && POWERED_CACHE_MISS_REASON ) |
| 588 |
) { |
| 589 |
header( "X-Powered-Cache-Miss-Reason: $reason" ); |
| 590 |
} |
| 591 |
} |
| 592 |
|
