| 1 |
<?php |
| 2 |
/** |
| 3 |
* File based caching drop-in based on Taylor Lovett's Simple Cache |
| 4 |
* @link https://github.com/tlovett1/simple-cache/blob/master/inc/dropins/file-based-page-cache.php |
| 5 |
*/ |
| 6 |
defined( 'ABSPATH' ) || exit; |
| 7 |
|
| 8 |
// Don't cache robots.txt or htacesss |
| 9 |
if ( strpos( $_SERVER['REQUEST_URI'], 'robots.txt' ) !== false || strpos( $_SERVER['REQUEST_URI'], '.htaccess' ) !== false ) { |
| 10 |
return; |
| 11 |
} |
| 12 |
|
| 13 |
// Don't cache non-GET requests |
| 14 |
if ( ! isset( $_SERVER['REQUEST_METHOD'] ) || 'GET' !== $_SERVER['REQUEST_METHOD'] ) { |
| 15 |
return; |
| 16 |
} |
| 17 |
|
| 18 |
// Don't cache wp-admin |
| 19 |
if ( is_admin() ) { |
| 20 |
return; |
| 21 |
} |
| 22 |
|
| 23 |
|
| 24 |
|
| 25 |
$file_extension = $_SERVER['REQUEST_URI']; |
| 26 |
$file_extension = preg_replace( '#^(.*?)\?.*$#', '$1', $file_extension ); |
| 27 |
$file_extension = trim( preg_replace( '#^.*\.(.*)$#', '$1', $file_extension ) ); |
| 28 |
|
| 29 |
// Don't cache disallowed extensions. Prevents wp-cron.php, xmlrpc.php, etc. |
| 30 |
if ( ! preg_match( '#index\.php$#i', $_SERVER['REQUEST_URI'] ) && in_array( $file_extension, array( 'php', 'xml', 'xsl' ) ) ) { |
| 31 |
return; |
| 32 |
} |
| 33 |
|
| 34 |
if ( ! $GLOBALS['powered_cache_options']['enable_page_caching'] ) { |
| 35 |
return; |
| 36 |
} |
| 37 |
|
| 38 |
// Don't cache page with these user agents |
| 39 |
if ( ! empty( $GLOBALS['powered_cache_options']['rejected_user_agents'] ) ) { |
| 40 |
$rejected_user_agents = preg_split( '#(\r\n|\r|\n)#', $GLOBALS['powered_cache_options']['rejected_user_agents'] ); |
| 41 |
$rejected_user_agents = implode( '|', $rejected_user_agents ); |
| 42 |
if ( ! empty( $rejected_user_agents ) && isset( $_SERVER['HTTP_USER_AGENT'] ) && preg_match( '#(' . $rejected_user_agents . ')#', $_SERVER['HTTP_USER_AGENT'] ) ) { |
| 43 |
return; |
| 44 |
} |
| 45 |
} |
| 46 |
|
| 47 |
|
| 48 |
// Don't cache SSL |
| 49 |
if ( powered_cache_is_ssl() && ( ! isset( $GLOBALS['powered_cache_options']['ssl_cache'] ) || false === $GLOBALS['powered_cache_options']['ssl_cache'] ) ) { |
| 50 |
return; |
| 51 |
} |
| 52 |
|
| 53 |
|
| 54 |
// dont cache mobile |
| 55 |
if ( ! isset( $GLOBALS['powered_cache_options']['cache_mobile'] ) || true !== $GLOBALS['powered_cache_options']['cache_mobile'] ) { |
| 56 |
global $powered_cache_mobile_browsers, $powered_cache_mobile_prefixes; |
| 57 |
|
| 58 |
$mobile_browsers = addcslashes( implode( '|', preg_split( '/[\s*,\s*]*,+[\s*,\s*]*/', $powered_cache_mobile_browsers ) ), ' ' ); |
| 59 |
$mobile_prefixes = addcslashes( implode( '|', preg_split( '/[\s*,\s*]*,+[\s*,\s*]*/', $powered_cache_mobile_prefixes ) ), ' ' ); |
| 60 |
// Don't cache if mobile detection is activated |
| 61 |
if ( (preg_match( '#^.*(' . $mobile_browsers . ').*#i', $_SERVER['HTTP_USER_AGENT'] ) || preg_match( '#^(' . $mobile_prefixes . ').*#i', substr( $_SERVER['HTTP_USER_AGENT'], 0, 4 ) ) ) ) { |
| 62 |
return ''; |
| 63 |
} |
| 64 |
} |
| 65 |
|
| 66 |
|
| 67 |
if ( ! empty( $_COOKIE ) ) { |
| 68 |
//Don't cache if logged in |
| 69 |
if ( ! isset( $GLOBALS['powered_cache_options']['loggedin_user_cache'] ) || false === $GLOBALS['powered_cache_options']['loggedin_user_cache'] ) { |
| 70 |
$wp_cookies = array( 'wordpressuser_', 'wordpresspass_', 'wordpress_sec_', 'wordpress_logged_in_' ); |
| 71 |
|
| 72 |
// check logged-in cookie |
| 73 |
foreach ( $_COOKIE as $key => $value ) { |
| 74 |
foreach ( $wp_cookies as $cookie ) { |
| 75 |
if ( strpos( $key, $cookie ) !== false ) { |
| 76 |
// Logged in! |
| 77 |
return; |
| 78 |
} |
| 79 |
} |
| 80 |
} |
| 81 |
} |
| 82 |
|
| 83 |
|
| 84 |
if ( ! empty( $_COOKIE['powered_cache_commented_posts'] ) ) { |
| 85 |
foreach ( $_COOKIE['powered_cache_commented_posts'] as $path ) { |
| 86 |
if ( rtrim( $path, '/' ) === rtrim( $_SERVER['REQUEST_URI'], '/' ) ) { |
| 87 |
// User commented on this post |
| 88 |
return; |
| 89 |
} |
| 90 |
} |
| 91 |
} |
| 92 |
|
| 93 |
// don't cache specific cookie |
| 94 |
if ( ! empty( $GLOBALS['powered_cache_options']['rejected_cookies'] ) ) { |
| 95 |
$rejected_cookies = preg_split( '#(\r\n|\r|\n)#', $GLOBALS['powered_cache_options']['rejected_cookies'] ); |
| 96 |
$rejected_cookies = implode( '|', $rejected_cookies ); |
| 97 |
if ( preg_match( '#(' . $rejected_cookies . ')#', var_export( $_COOKIE, true ) ) ) { |
| 98 |
return; |
| 99 |
} |
| 100 |
} |
| 101 |
} // End if(). |
| 102 |
|
| 103 |
// Deal with optional cache exceptions |
| 104 |
if ( ! empty( $GLOBALS['powered_cache_options']['rejected_uri'] ) ) { |
| 105 |
$exceptions = preg_split( '#(\r\n|\r|\n)#', $GLOBALS['powered_cache_options']['rejected_uri'] ); |
| 106 |
|
| 107 |
foreach ( $exceptions as $exception ) { |
| 108 |
if ( preg_match( '#^[\s]*$#', $exception ) ) { |
| 109 |
continue; |
| 110 |
} |
| 111 |
|
| 112 |
// full url exception |
| 113 |
if ( preg_match( '#^https?://#', $exception ) ) { |
| 114 |
$exception = parse_url( $exception, PHP_URL_PATH ); |
| 115 |
} |
| 116 |
|
| 117 |
if ( preg_match( '#^(' . $exception . ')$#', $_SERVER['REQUEST_URI'] ) ) { |
| 118 |
return; |
| 119 |
} |
| 120 |
} |
| 121 |
} |
| 122 |
|
| 123 |
|
| 124 |
$accepted_query_strings = array(); |
| 125 |
// cache url with allowed query string |
| 126 |
if ( ! empty( $GLOBALS['powered_cache_options']['accepted_query_strings'] ) ) { |
| 127 |
$accepted_query_strings = preg_split( '#(\r\n|\r|\n)#', $GLOBALS['powered_cache_options']['accepted_query_strings'] ); |
| 128 |
} |
| 129 |
|
| 130 |
if ( ! empty( $_GET ) && isset( $accepted_query_strings ) && is_array( $accepted_query_strings ) && ! array_intersect( array_keys( $_GET ), $accepted_query_strings ) ) { |
| 131 |
return; |
| 132 |
} |
| 133 |
|
| 134 |
powered_cache_serve_cache(); |
| 135 |
|
| 136 |
ob_start( 'powered_cache_page_buffer' ); |
| 137 |
|
| 138 |
/** |
| 139 |
* Cache output before it goes to the browser |
| 140 |
* |
| 141 |
* @param string $buffer |
| 142 |
* @param int $flags |
| 143 |
* @since 1.0 |
| 144 |
* @return string |
| 145 |
*/ |
| 146 |
function powered_cache_page_buffer( $buffer, $flags ) { |
| 147 |
if ( strlen( $buffer ) < 255 ) { |
| 148 |
return $buffer; |
| 149 |
} |
| 150 |
|
| 151 |
// Don't cache search, 404, or password protected |
| 152 |
if ( is_404() || is_search() || post_password_required() ) { |
| 153 |
return $buffer; |
| 154 |
} |
| 155 |
|
| 156 |
// maybe we shouldn't cache template file has this constant |
| 157 |
if ( defined( 'DONOTCACHEPAGE' ) && true === DONOTCACHEPAGE ) { |
| 158 |
return $buffer; |
| 159 |
} |
| 160 |
|
| 161 |
// plugins might want to use filter |
| 162 |
if ( true !== apply_filters( 'powered_cache_page_cache_enable', true ) ) { |
| 163 |
return $buffer; |
| 164 |
} |
| 165 |
|
| 166 |
include_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-base.php'; |
| 167 |
include_once ABSPATH . 'wp-admin/includes/class-wp-filesystem-direct.php'; |
| 168 |
|
| 169 |
$filesystem = new WP_Filesystem_Direct( new StdClass() ); |
| 170 |
|
| 171 |
if ( ! function_exists( 'powered_cache_get_cache_dir' ) ) { |
| 172 |
return $buffer; |
| 173 |
} |
| 174 |
|
| 175 |
// Make sure we can read/write files and that proper folders exist |
| 176 |
if ( ! $filesystem->exists( untrailingslashit( powered_cache_get_cache_dir() ) ) ) { |
| 177 |
if ( ! $filesystem->mkdir( untrailingslashit( powered_cache_get_cache_dir() ) ) ) { |
| 178 |
// Can not cache! |
| 179 |
return $buffer; |
| 180 |
} |
| 181 |
} |
| 182 |
|
| 183 |
if ( ! $filesystem->exists( powered_cache_get_page_cache_dir() ) ) { |
| 184 |
if ( ! $filesystem->mkdir( powered_cache_get_page_cache_dir() ) ) { |
| 185 |
// Can not cache! |
| 186 |
return $buffer; |
| 187 |
} |
| 188 |
} |
| 189 |
|
| 190 |
$buffer = apply_filters( 'powered_cache_page_caching_buffer', $buffer ); |
| 191 |
|
| 192 |
$url_path = powered_cache_get_url_path(); |
| 193 |
|
| 194 |
$dirs = explode( '/', $url_path ); |
| 195 |
|
| 196 |
$path = untrailingslashit( powered_cache_get_page_cache_dir() ); |
| 197 |
|
| 198 |
foreach ( $dirs as $dir ) { |
| 199 |
if ( ! empty( $dir ) ) { |
| 200 |
$path .= '/' . $dir; |
| 201 |
|
| 202 |
if ( ! $filesystem->exists( $path ) ) { |
| 203 |
if ( ! $filesystem->mkdir( $path ) ) { |
| 204 |
// Can not cache! |
| 205 |
return $buffer; |
| 206 |
} |
| 207 |
} |
| 208 |
} |
| 209 |
} |
| 210 |
|
| 211 |
$modified_time = time(); // Make sure modified time is consistent |
| 212 |
|
| 213 |
if ( array_key_exists( 'show_cache_message', $GLOBALS['powered_cache_options'] ) && true === $GLOBALS['powered_cache_options']['show_cache_message'] ) { |
| 214 |
if ( preg_match( '#</html>#i', $buffer ) ) { |
| 215 |
$buffer .= "\n<!-- Cache served by Powered Cache - Last modified: " . gmdate( 'D, d M Y H:i:s', $modified_time ) . " GMT -->\n"; |
| 216 |
} |
| 217 |
} |
| 218 |
|
| 219 |
$index_name = powered_cache_index_file(); |
| 220 |
|
| 221 |
if ( $GLOBALS['powered_cache_options']['gzip_compression'] && function_exists( 'gzencode' ) ) { |
| 222 |
$filesystem->put_contents( $path . '/' . $index_name, gzencode( $buffer, 3 ), FS_CHMOD_FILE ); |
| 223 |
$filesystem->touch( $path . '/' . $index_name, $modified_time ); |
| 224 |
} else { |
| 225 |
$filesystem->put_contents( $path . '/' . $index_name, $buffer, FS_CHMOD_FILE ); |
| 226 |
$filesystem->touch( $path . '/' . $index_name, $modified_time ); |
| 227 |
} |
| 228 |
|
| 229 |
header( 'Cache-Control: no-cache' ); // Check back every time to see if re-download is necessary |
| 230 |
|
| 231 |
header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', $modified_time ) . ' GMT' ); |
| 232 |
|
| 233 |
do_action( 'powered_cache_page_cached', $buffer ); |
| 234 |
|
| 235 |
if ( function_exists( 'ob_gzhandler' ) && $GLOBALS['powered_cache_options']['gzip_compression'] ) { |
| 236 |
return ob_gzhandler( $buffer, $flags ); |
| 237 |
} else { |
| 238 |
return $buffer; |
| 239 |
} |
| 240 |
} |
| 241 |
|
| 242 |
|
| 243 |
/** |
| 244 |
* Optionally serve cache and exit |
| 245 |
* |
| 246 |
* @since 1.0 |
| 247 |
*/ |
| 248 |
function powered_cache_serve_cache() { |
| 249 |
|
| 250 |
$file_name = powered_cache_index_file(); |
| 251 |
|
| 252 |
$path = rtrim( $GLOBALS['powered_cache_options']['cache_location'], '/' ) . '/powered-cache/' . rtrim( powered_cache_get_url_path(), '/' ) . '/' . $file_name; |
| 253 |
|
| 254 |
$modified_time = (int) @filemtime( $path ); |
| 255 |
|
| 256 |
header( 'Cache-Control: no-cache' ); // Check back in an hour |
| 257 |
|
| 258 |
if ( ! empty( $modified_time ) && ! empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) && strtotime( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) === $modified_time ) { |
| 259 |
header( $_SERVER['SERVER_PROTOCOL'] . ' 304 Not Modified', true, 304 ); |
| 260 |
exit; |
| 261 |
} |
| 262 |
|
| 263 |
if ( @file_exists( $path ) && @is_readable( $path ) ) { |
| 264 |
|
| 265 |
header( 'X-Powered-Cache: php' ); |
| 266 |
|
| 267 |
if ( function_exists( 'gzencode' ) && $GLOBALS['powered_cache_options']['gzip_compression'] ) { |
| 268 |
header( 'Content-Encoding: gzip' ); |
| 269 |
} |
| 270 |
|
| 271 |
@readfile( $path ); |
| 272 |
|
| 273 |
exit; |
| 274 |
} |
| 275 |
} |
| 276 |
|
| 277 |
/** |
| 278 |
* Get URL path for caching |
| 279 |
* |
| 280 |
* @since 1.0 |
| 281 |
* @return string |
| 282 |
*/ |
| 283 |
function powered_cache_get_url_path() { |
| 284 |
|
| 285 |
$host = ( isset( $_SERVER['HTTP_HOST'] ) ) ? $_SERVER['HTTP_HOST'] : ''; |
| 286 |
|
| 287 |
return rtrim( $host, '/' ) . $_SERVER['REQUEST_URI']; |
| 288 |
} |
| 289 |
|
| 290 |
function powered_cache_get_user_cookie() { |
| 291 |
if ( empty( $_COOKIE ) ) { |
| 292 |
return false; |
| 293 |
} |
| 294 |
|
| 295 |
foreach ( $_COOKIE as $c_key => $val ) { |
| 296 |
if ( false !== strpos( $c_key, 'wordpress_logged_in_' ) ) { |
| 297 |
return $val; |
| 298 |
} |
| 299 |
} |
| 300 |
|
| 301 |
return false; |
| 302 |
} |
| 303 |
|
| 304 |
|
| 305 |
/** |
| 306 |
* Determines cache file names |
| 307 |
* @since 1.0 |
| 308 |
* @return string |
| 309 |
*/ |
| 310 |
function powered_cache_index_file() { |
| 311 |
$file_name = 'index'; |
| 312 |
|
| 313 |
if ( powered_cache_is_ssl() ) { |
| 314 |
$file_name .= '-https'; |
| 315 |
} |
| 316 |
|
| 317 |
// separate file for mobile cache |
| 318 |
if ( isset( $GLOBALS['powered_cache_options']['cache_mobile'], $GLOBALS['powered_cache_options']['cache_mobile_separate_file'] ) |
| 319 |
&& true === $GLOBALS['powered_cache_options']['cache_mobile'] |
| 320 |
&& true === $GLOBALS['powered_cache_options']['cache_mobile_separate_file'] |
| 321 |
) { |
| 322 |
|
| 323 |
global $powered_cache_mobile_browsers, $powered_cache_mobile_prefixes; |
| 324 |
|
| 325 |
$mobile_browsers = addcslashes( implode( '|', preg_split( '/[\s*,\s*]*,+[\s*,\s*]*/', $powered_cache_mobile_browsers ) ), ' ' ); |
| 326 |
$mobile_prefixes = addcslashes( implode( '|', preg_split( '/[\s*,\s*]*,+[\s*,\s*]*/', $powered_cache_mobile_prefixes ) ), ' ' ); |
| 327 |
|
| 328 |
// Don't cache if mobile detection is activated |
| 329 |
if ( (preg_match( '#^.*(' . $mobile_browsers . ').*#i', $_SERVER['HTTP_USER_AGENT'] ) || preg_match( '#^(' . $mobile_prefixes . ').*#i', substr( $_SERVER['HTTP_USER_AGENT'], 0, 4 ) ) ) ) { |
| 330 |
$file_name .= '-mobile'; |
| 331 |
} |
| 332 |
} |
| 333 |
|
| 334 |
if ( isset( $GLOBALS['powered_cache_options']['loggedin_user_cache'] ) |
| 335 |
&& true === $GLOBALS['powered_cache_options']['loggedin_user_cache'] |
| 336 |
) { |
| 337 |
$usr_cookie = powered_cache_get_user_cookie(); |
| 338 |
if ( false !== $usr_cookie ) { |
| 339 |
$cookie_info = explode( '|', $usr_cookie ); |
| 340 |
|
| 341 |
// user specific cache dir |
| 342 |
$file_name .= '_' . $cookie_info[0] . '-' . $cookie_info[1]; |
| 343 |
} |
| 344 |
} |
| 345 |
|
| 346 |
$file_name .= '.html'; |
| 347 |
|
| 348 |
if ( function_exists( 'gzencode' ) && $GLOBALS['powered_cache_options']['gzip_compression'] ) { |
| 349 |
$file_name .= '_gzip'; |
| 350 |
} |
| 351 |
|
| 352 |
return $file_name; |
| 353 |
} |
| 354 |
|
| 355 |
|
| 356 |
/** |
| 357 |
* is_ssl moved load.php in WP 4.6 but we support WP 4.1+ |
| 358 |
* |
| 359 |
* @return bool |
| 360 |
*/ |
| 361 |
function powered_cache_is_ssl() { |
| 362 |
if ( isset( $_SERVER['HTTPS'] ) ) { |
| 363 |
if ( 'on' == strtolower( $_SERVER['HTTPS'] ) ) { |
| 364 |
return true; |
| 365 |
} |
| 366 |
|
| 367 |
if ( '1' == $_SERVER['HTTPS'] ) { |
| 368 |
return true; |
| 369 |
} |
| 370 |
} elseif ( isset( $_SERVER['SERVER_PORT'] ) && ( '443' == $_SERVER['SERVER_PORT'] ) ) { |
| 371 |
return true; |
| 372 |
} |
| 373 |
|
| 374 |
return false; |
| 375 |
} |
| 376 |
|
