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| Dir : /home/trave494/live2news.com/wp-content/plugins/w3-total-cache/Cache_File_Generic.php |
<?php
namespace W3TC;
/**
* Disk:Enhanced file cache
*/
class Cache_File_Generic extends Cache_File {
/**
* Expire
*
* @var integer
*/
var $_expire = 0;
/**
* PHP5-style constructor
*
* @param array $config
*/
function __construct( $config = array() ) {
parent::__construct( $config );
$this->_expire = ( isset( $config['expire'] ) ? (int) $config['expire'] : 0 );
if ( !$this->_expire || $this->_expire > W3TC_CACHE_FILE_EXPIRE_MAX ) {
$this->_expire = W3TC_CACHE_FILE_EXPIRE_MAX;
}
}
/**
* Sets data
*
* @param string $key
* @param string $var
* @param int $expire
* @param string $group Used to differentiate between groups of cache values
* @return boolean
*/
function set( $key, $var, $expire = 0, $group = '' ) {
$key = $this->get_item_key( $key );
$sub_path = $this->_get_path( $key, $group );
$path = $this->_cache_dir . DIRECTORY_SEPARATOR . $sub_path;
$dir = dirname( $path );
if ( !@is_dir( $dir ) ) {
if ( !Util_File::mkdir_from_safe( $dir, dirname( W3TC_CACHE_DIR ) ) )
return false;
}
$tmppath = $path . '.' . getmypid();
$fp = @fopen( $tmppath, 'wb' );
if ( !$fp )
return false;
if ( $this->_locking )
@flock( $fp, LOCK_EX );
@fputs( $fp, $var['content'] );
@fclose( $fp );
if ( $this->_locking )
@flock( $fp, LOCK_UN );
// some hostings create files with restrictive permissions
// not allowing apache to read it later
@chmod( $path, 0644 );
if ( @filesize( $tmppath ) > 0 ) {
@unlink( $path );
@rename( $tmppath, $path );
}
@unlink( $tmppath );
$old_entry_path = $path . '_old';
@unlink( $old_entry_path );
if ( Util_Environment::is_apache() && isset( $var['headers'] ) ) {
$rules = '';
if ( isset( $var['headers']['Content-Type'] ) &&
substr( $var['headers']['Content-Type'], 0, 8 ) == 'text/xml' ) {
$rules .= "<IfModule mod_mime.c>\n";
$rules .= " RemoveType .html_gzip\n";
$rules .= " AddType text/xml .html_gzip\n";
$rules .= " RemoveType .html\n";
$rules .= " AddType text/xml .html\n";
$rules .= "</IfModule>\n";
}
if ( isset( $var['headers'] ) ) {
$headers = array();
foreach ( $var['headers'] as $h ) {
if ( isset( $h['n'] ) && isset( $h['v'] ) ) {
$h2 = apply_filters( 'w3tc_pagecache_set_header', $h, $h,
'file_generic' );
if ( !empty( $h2 ) ) {
$name_escaped = $this->escape_header_name( $h2['n'] );
if ( !isset( $headers[$name_escaped] ) ) {
$headers[$name_escaped] = array(
'values' => array(),
'files_match' => $h2['files_match']
);
}
$value_escaped = $this->escape_header_value( $h2['v'] );
if ( !empty( $value_escaped ) ) {
$headers[$name_escaped]['values'][] =
" Header add " .
$name_escaped .
" '" . $value_escaped . "'\n";
}
}
}
}
$header_rules = '';
foreach ( $headers as $name_escaped => $value ) {
// Link header doesnt apply to .xml assets
$header_rules .= ' <FilesMatch "' . $value['files_match'] . "\">\n";
$header_rules .= " Header unset $name_escaped\n";
$header_rules .= implode( "\n", $value['values'] );
$header_rules .= " </FilesMatch>\n";
}
if ( !empty( $header_rules ) ) {
$rules .= "<IfModule mod_headers.c>\n";
$rules .= $header_rules;
$rules .= "</IfModule>\n";
}
}
if ( !empty($rules) ) {
@file_put_contents( dirname( $path ) .
DIRECTORY_SEPARATOR . '.htaccess', $rules );
}
}
return true;
}
private function escape_header_name( $v ) {
return preg_replace( '~[^0-9A-Za-z\-]~m', '_', $v );
}
private function escape_header_value( $v ) {
return str_replace( "'", "\\'",
str_replace( "\\", "\\\\\\", // htaccess need escape of \ to \\\
preg_replace( '~[\r\n]~m', '_', trim( $v ) ) ) );
}
/**
* Returns data
*
* @param string $key
* @param string $group Used to differentiate between groups of cache values
* @return array
*/
function get_with_old( $key, $group = '' ) {
$has_old_data = false;
$key = $this->get_item_key( $key );
$path = $this->_cache_dir . DIRECTORY_SEPARATOR .
$this->_get_path( $key, $group );
$data = $this->_read( $path );
if ( $data != null )
return array( $data, $has_old_data );
$path_old = $path . '_old';
$too_old_time = time() - 30;
if ( $exists = file_exists( $path_old ) ) {
$file_time = @filemtime( $path_old );
if ( $file_time ) {
if ( $file_time > $too_old_time ) {
// return old data
$has_old_data = true;
return array( $this->_read( $path_old ), $has_old_data );
}
// use old enough time to cause recalculation on next call
@touch( $path_old, 1479904835 );
}
}
$has_old_data = $exists;
return array( null, $has_old_data );
}
/**
* Reads file
*
* @param string $path
* @return array
*/
private function _read( $path ) {
if ( !is_readable( $path ) )
return null;
// make sure reading from cache folder
// canonicalize to avoid unexpected variants
$base_path = realpath( $this->_cache_dir );
$path = realpath( $path );
if ( strlen( $base_path ) <= 0 ||
substr( $path, 0, strlen( $base_path ) ) != $base_path ) {
return null;
}
$fp = @fopen( $path, 'rb' );
if ( !$fp )
return null;
if ( $this->_locking )
@flock( $fp, LOCK_SH );
$var = '';
while ( !@feof( $fp ) )
$var .= @fread( $fp, 4096 );
@fclose( $fp );
if ( $this->_locking )
@flock( $fp, LOCK_UN );
$headers = array();
if ( substr( $path, -4 ) == '.xml' ) {
$headers['Content-type'] = 'text/xml';
}
return array(
'404' => false,
'headers' => $headers,
'time' => null,
'content' => $var
);
}
/**
* Deletes data
*
* @param string $key
* @param string $group Used to differentiate between groups of cache values
* @return boolean
*/
function delete( $key, $group = '' ) {
$key = $this->get_item_key( $key );
$path = $this->_cache_dir . DIRECTORY_SEPARATOR . $this->_get_path( $key, $group );
if ( !file_exists( $path ) )
return true;
$dir = dirname( $path );
if ( file_exists( $dir . DIRECTORY_SEPARATOR . '.htaccess' ) ) {
@unlink( $dir . DIRECTORY_SEPARATOR . '.htaccess' );
}
$old_entry_path = $path . '_old';
if ( ! @rename( $path, $old_entry_path ) ) {
// if we can delete old entry - do second attempt to store in old-entry file
if ( ! @unlink( $old_entry_path ) || ! @rename( $path, $old_entry_path ) ) {
return @unlink( $path );
}
}
/**
* Disabling this as we don't want to immediately hard-expire _old cache files as there is a
* 30 second window where they are still served via get_with_old calls. During AWS testing on
* WP 5.9/6.3 this was resulting in the _old file immediately being removed during the clean
* operation, resulting in failed automated tests (8/1/2023)
*/
// @touch( $old_entry_path, 1479904835 );
return true;
}
/**
* Key to delete, deletes _old and primary if exists.
*
* @param unknown $key
* @return bool
*/
function hard_delete( $key, $group = '' ) {
$key = $this->get_item_key( $key );
$path = $this->_cache_dir . DIRECTORY_SEPARATOR . $this->_get_path( $key, $group );
$old_entry_path = $path . '_old';
@unlink( $old_entry_path );
if ( !file_exists( $path ) )
return true;
@unlink( $path );
return true;
}
/**
* Flushes all data
*
* @param string $group Used to differentiate between groups of cache values
* @return boolean
*/
function flush( $group = '' ) {
if ( $group == 'sitemaps' ) {
$config = Dispatcher::config();
$sitemap_regex = $config->get_string( 'pgcache.purge.sitemap_regex' );
$this->_flush_based_on_regex( $sitemap_regex );
} else {
$dir = $this->_flush_dir;
if ( !empty( $group ) ) {
$c = new Cache_File_Cleaner_Generic_HardDelete( array(
'cache_dir' => $this->_flush_dir .
DIRECTORY_SEPARATOR . $group,
'exclude' => $this->_exclude,
'clean_timelimit' => $this->_flush_timelimit
) );
} else {
$c = new Cache_File_Cleaner_Generic( array(
'cache_dir' => $this->_flush_dir,
'exclude' => $this->_exclude,
'clean_timelimit' => $this->_flush_timelimit
) );
}
$c->clean();
}
return true;
}
/**
* Returns cache file path by key
*
* @param string $key
* @return string
*/
function _get_path( $key, $group = '' ) {
return ( empty( $group ) ? '' : $group . DIRECTORY_SEPARATOR ) . $key;
}
function get_item_key( $key ) {
return $key;
}
/**
* Flush cache based on regex
*
* @param string $regex
*/
private function _flush_based_on_regex( $regex ) {
if ( Util_Environment::is_wpmu() && !Util_Environment::is_wpmu_subdomain() ) {
$domain = get_home_url();
$parsed = parse_url( $domain );
$host = $parsed['host'];
$path = isset( $parsed['path'] ) ? '/' . trim( $parsed['path'], '/' ) : '';
$flush_dir = W3TC_CACHE_PAGE_ENHANCED_DIR .
DIRECTORY_SEPARATOR . $host . $path;
} else
$flush_dir = W3TC_CACHE_PAGE_ENHANCED_DIR .
DIRECTORY_SEPARATOR . Util_Environment::host();
$dir = @opendir( $flush_dir );
if ( $dir ) {
while ( ( $entry = @readdir( $dir ) ) !== false ) {
if ( $entry == '.' || $entry == '..' ) {
continue;
}
if ( preg_match( '~' . $regex . '~', basename( $entry ) ) ) {
Util_File::rmdir( $flush_dir . DIRECTORY_SEPARATOR . $entry );
}
}
@closedir( $dir );
}
}
}