petermolnar/wp-ffpc
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Backported paginated post/page cache clearing.

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This commit is contained in:
Anton Pelešev 2014-08-22 16:41:08 +03:00
parent bc825f4cae
commit 14b1d416d1
1 changed files with 45 additions and 12 deletions
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57
wp-ffpc-backend.php
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@ -85,6 +85,27 @@ class WP_FFPC_Backend {
}
public static function parse_urimap($uri, $default_urimap=null) {
$uri_parts = parse_url( $uri );
$uri_map = array(
'$scheme' => $uri_parts['scheme'],
'$host' => $uri_parts['host'],
'$request_uri' => $uri_parts['path']
);
if (is_array($default_urimap)) {
$uri_map = array_merge($default_urimap, $uri_map);
}
return $uri_map;
}
public static function map_urimap($urimap, $subject) {
return str_replace(array_keys($urimap), $urimap, $subject);
}
/*********************** PUBLIC / PROXY FUNCTIONS ***********************/
/**
@ -95,7 +116,7 @@ class WP_FFPC_Backend {
*/
public function key ( &$prefix ) {
/* data is string only with content, meta is not used in nginx */
$key = $prefix . str_replace ( array_keys( $this->urimap ), $this->urimap, $this->options['key'] );
$key = $prefix . self::map_urimap($this->urimap, $this->options['key']);
$this->log ( sprintf( __translate__( 'original key configuration: %s', $this->plugin_constant ), $this->options['key'] ) );
$this->log ( sprintf( __translate__( 'setting key to: %s', $this->plugin_constant ), $key ) );
return $key;
@ -207,24 +228,36 @@ class WP_FFPC_Backend {
if ( !function_exists('get_permalink') )
include_once ( ABSPATH . 'wp-includes/link-template.php' );
/* get path from permalink */
$path = substr ( get_permalink( $post_id ) , 7 );
/* get permalink */
$permalink = get_permalink( $post_id );
/* no path, don't do anything */
if ( empty( $path ) ) {
if ( empty( $permalink ) ) {
$this->log ( sprintf( __translate__( 'unable to determine path from Post Permalink, post ID: %s', $this->plugin_constant ), $post_id ), LOG_WARNING );
return false;
}
if ( isset($_SERVER['HTTPS']) && ( ( strtolower($_SERVER['HTTPS']) == 'on' ) || ( $_SERVER['HTTPS'] == '1' ) ) )
$protocol = 'https://';
else
$protocol = 'http://';
/*
* It is possible that post/page is paginated with <!--nextpage-->
* Wordpress doesn't seem to expose the number of pages via API.
* So let's just count it.
*/
$content_post = get_post( $post_id );
$content = $content_post->post_content;
$number_of_pages = 1 + (int)preg_match_all('/<!--nextpage-->/', $content, $matches);
/* elements to clear
values are keys, faster to process and eliminates duplicates
*/
$to_clear[ $protocol . $path ] = true;
$current_page_id = '';
do {
/* urimap */
$urimap = self::parse_urimap($permalink, $this->urimap);
$urimap['$request_uri'] = $urimap['$request_uri'] . ($current_page_id ? $current_page_id . '/' : '');
$clear_cache_key = self::map_urimap($urimap, $this->options['key']);
$to_clear[ $clear_cache_key ] = true;
$current_page_id = 1+(int)$current_page_id;
} while ($number_of_pages>1 && $current_page_id<=$number_of_pages);
}
foreach ( $to_clear as $link => $dummy ) {