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