| Current Path : /storage/v11800/affypharma/public_html/wp-content/plugins/w3-total-cache/ |
Linux v11800 5.3.0-1023-aws #25~18.04.1-Ubuntu SMP Fri Jun 5 15:19:18 UTC 2020 aarch64
|
| Current File : /storage/v11800/affypharma/public_html/wp-content/plugins/w3-total-cache/CdnEngine_Base.php |
<?php
namespace W3TC;
/**
* W3 CDN Base class
*/
define( 'W3TC_CDN_RESULT_HALT', -1 );
define( 'W3TC_CDN_RESULT_ERROR', 0 );
define( 'W3TC_CDN_RESULT_OK', 1 );
define( 'W3TC_CDN_HEADER_NONE', 'none' );
define( 'W3TC_CDN_HEADER_UPLOADABLE', 'uploadable' );
define( 'W3TC_CDN_HEADER_MIRRORING', 'mirroring' );
/**
* class CdnEngine_Base
*/
class CdnEngine_Base {
/**
* Engine configuration
*
* @var array
*/
var $_config = array();
/**
* gzip extension
*
* @var string
*/
var $_gzip_extension = '.gzip';
/**
* Last error
*
* @var string
*/
var $_last_error = '';
/**
* PHP5 Constructor
*
* @param array $config
*/
function __construct( $config = array() ) {
$this->_config = array_merge( array(
'debug' => false,
'ssl' => 'auto',
'compression' => false,
'headers' => array()
), $config );
}
/**
* Upload files to CDN
*
* @param array $files takes array consisting of array(array('local_path'=>'', 'remote_path'=>''))
* @param array $results
* @param boolean $force_rewrite
* @return boolean
*/
function upload( $files, &$results, $force_rewrite = false,
$timeout_time = NULL ) {
$results = $this->_get_results( $files, W3TC_CDN_RESULT_HALT,
'Not implemented.' );
return false;
}
/**
* Delete files from CDN
*
* @param array $files
* @param array $results
* @return boolean
*/
function delete( $files, &$results ) {
$results = $this->_get_results( $files, W3TC_CDN_RESULT_HALT,
'Not implemented.' );
return false;
}
/**
* Purge files from CDN
*
* @param array $files
* @param array $results
* @return boolean
*/
function purge( $files, &$results ) {
return $this->upload( $files, $results, true );
}
/**
* Purge CDN completely
*
* @param unknown $results
* @return bool
*/
function purge_all( &$results ) {
$results = $this->_get_results( array(), W3TC_CDN_RESULT_HALT,
'Not implemented.' );
return false;
}
/**
* Test CDN server
*
* @param string $error
* @return boolean
*/
function test( &$error ) {
if ( !$this->_test_domains( $error ) ) {
return false;
}
return true;
}
/**
* Create bucket / container for some CDN engines
*/
function create_container() {
throw new \Exception( 'Not implemented.' );
}
/**
* Returns first domain
*
* @param string $path
* @return string
*/
function get_domain( $path = '' ) {
$domains = $this->get_domains();
$count = count( $domains );
if ( $count ) {
switch ( true ) {
/**
* Reserved CSS
*/
case ( isset( $domains[0] ) && $this->_is_css( $path ) ):
$domain = $domains[0];
break;
/**
* Reserved JS after body
*/
case ( isset( $domains[2] ) && $this->_is_js_body( $path ) ):
$domain = $domains[2];
break;
/**
* Reserved JS before /body
*/
case ( isset( $domains[3] ) && $this->_is_js_footer( $path ) ):
$domain = $domains[3];
break;
/**
* Reserved JS in head, moved here due to greedy regex
*/
case ( isset( $domains[1] ) && $this->_is_js( $path ) ):
$domain = $domains[1];
break;
default:
if ( !isset( $domains[0] ) ) {
$scheme = $this->_get_scheme();
if ( 'https' == $scheme && !empty( $domains['https_default'] ) ) {
return $domains['https_default'];
} else {
return isset( $domains['http_default'] ) ? $domains['http_default'] :
$domains['https_default'];
}
} elseif ( $count > 4 ) {
$domain = $this->_get_domain( array_slice( $domains, 4 ),
$path );
} else {
$domain = $this->_get_domain( $domains, $path );
}
}
/**
* Custom host for SSL
*/
list( $domain_http, $domain_https ) = array_map( 'trim',
explode( ',', $domain . ',' ) );
$scheme = $this->_get_scheme();
switch ( $scheme ) {
case 'http':
$domain = $domain_http;
break;
case 'https':
$domain = ( $domain_https ? $domain_https : $domain_http );
break;
}
return $domain;
}
return false;
}
/**
* Returns array of CDN domains
*
* @return array
*/
function get_domains() {
return array();
}
/**
* Returns via string
*
* @return string
*/
function get_via() {
$domain = $this->get_domain();
if ( $domain ) {
return $domain;
}
return 'N/A';
}
/**
* Formats URL
*
* @param string $path
* @return string
*/
function format_url( $path ) {
$url = $this->_format_url( $path );
if ( $url && $this->_config['compression'] && ( isset( $_SERVER['HTTP_ACCEPT_ENCODING'] ) ? stristr( sanitize_text_field( wp_unslash( $_SERVER['HTTP_ACCEPT_ENCODING'] ) ), 'gzip' ) !== false : false ) && $this->_may_gzip( $path ) ) {
if ( ( $qpos = strpos( $url, '?' ) ) !== false ) {
$url = substr_replace( $url, $this->_gzip_extension, $qpos, 0 );
} else {
$url .= $this->_gzip_extension;
}
}
return $url;
}
/**
* Returns prepend path
*
* @param string $path
* @return string
*/
function get_prepend_path( $path ) {
$domain = $this->get_domain( $path );
if ( $domain ) {
$scheme = $this->_get_scheme();
$url = sprintf( '%s://%s', $scheme, $domain );
return $url;
}
return false;
}
/**
* Formats URL
*
* @param string $path
* @return string
*/
function _format_url( $path ) {
$domain = $this->get_domain( $path );
if ( $domain ) {
$scheme = $this->_get_scheme();
$url = sprintf( '%s://%s/%s', $scheme, $domain, $path );
return $url;
}
return false;
}
/**
* Returns results
*
* @param array $files
* @param integer $result
* @param string $error
* @return array
*/
function _get_results( $files, $result = W3TC_CDN_RESULT_OK,
$error = 'OK' ) {
$results = array();
foreach ( $files as $key => $file ) {
if ( is_array( $file ) ) {
$local_path = $file['local_path'];
$remote_path = $file['remote_path'];
} else {
$local_path = $key;
$remote_path = $file;
}
$results[] = $this->_get_result( $local_path, $remote_path, $result,
$error, $file );
}
return $results;
}
/**
* Returns file process result
*
* @param string $local_path
* @param string $remote_path
* @param integer $result
* @param string $error
* @return array
*/
function _get_result( $local_path, $remote_path,
$result = W3TC_CDN_RESULT_OK, $error = 'OK', $descriptor = null ) {
if ( $this->_config['debug'] ) {
$this->_log( $local_path, $remote_path, $error );
}
return array(
'local_path' => $local_path,
'remote_path' => $remote_path,
'result' => $result,
'error' => $error,
'descriptor' => $descriptor
);
}
/**
* Check for errors
*
* @param array $results
* @return bool
*/
function _is_error( $results ) {
foreach ( $results as $result ) {
if ( $result['result'] != W3TC_CDN_RESULT_OK ) {
return true;
}
}
return false;
}
/**
* Returns headers for file
*
* @param array $file CDN file array
* @param array $whitelist which expensive headers to calculate
* @return array
*/
function get_headers_for_file( $file, $whitelist = array() ) {
$local_path = $file['local_path'];
$mime_type = Util_Mime::get_mime_type( $local_path );
$link = $file['original_url'];
$headers = array(
'Content-Type' => $mime_type,
'Last-Modified' => Util_Content::http_date( time() ),
'Access-Control-Allow-Origin' => '*',
'Link' => '<' . $link .'>; rel="canonical"'
);
$section = Util_Mime::mime_type_to_section( $mime_type );
if ( isset( $this->_config['headers'][$section] ) ) {
$hc = $this->_config['headers'][$section];
if ( isset( $whitelist['ETag'] ) && $hc['etag'] ) {
$headers['ETag'] = '"' . @md5_file( $local_path ) . '"';
}
if ( $hc['expires'] ) {
$headers['Expires'] = Util_Content::http_date( time() +
$hc['lifetime'] );
$expires_set = true;
}
$headers = array_merge( $headers, $hc['static'] );
}
return $headers;
}
/**
* Use gzip compression only for text-based files
*
* @param string $file
* @return boolean
*/
function _may_gzip( $file ) {
/**
* Remove query string
*/
$file = preg_replace( '~\?.*$~', '', $file );
/**
* Check by file extension
*/
if ( preg_match( '~\.(ico|js|css|xml|xsd|xsl|svg|htm|html|txt)$~i',
$file ) ) {
return true;
}
return false;
}
/**
* Test domains
*
* @param string $error
* @return boolean
*/
function _test_domains( &$error ) {
$domains = $this->get_domains();
if ( !count( $domains ) ) {
$error = 'Empty hostname / CNAME list.';
return false;
}
foreach ( $domains as $domain ) {
$_domains = array_map( 'trim', explode( ',', $domain ) );
foreach ( $_domains as $_domain ) {
$matches = null;
if ( preg_match( '~^([a-z0-9\-\.]*)~i', $_domain, $matches ) ) {
$hostname = $matches[1];
} else {
$hostname = $_domain;
}
if ( empty( $hostname ) ) {
continue;
}
if ( gethostbyname( $hostname ) === $hostname ) {
$error = sprintf( 'Unable to resolve hostname: %s.',
$hostname );
return false;
}
}
}
return true;
}
/**
* Check if css file
*
* @param string $path
* @return boolean
*/
function _is_css( $path ) {
return preg_match( '~[a-zA-Z0-9\-_]*(\.include\.[0-9]+)?\.css$~',
$path );
}
/**
* Check if JS file in heeader
*
* @param string $path
* @return boolean
*/
function _is_js( $path ) {
return preg_match( '~([a-z0-9\-_]+(\.include\.[a-z0-9]+)\.js)$~',
$path ) ||
preg_match( '~[\w\d\-_]+\.js~', $path );
}
/**
* Check if JS file after body
*
* @param string $path
* @return boolean
*/
function _is_js_body( $path ) {
return preg_match( '~[a-z0-9\-_]+(\.include-body\.[a-z0-9]+)\.js$~',
$path );
}
/**
* Check if JS file before /body
*
* @param string $path
* @return boolean
*/
function _is_js_footer( $path ) {
return preg_match( '~[a-z0-9\-_]+(\.include-footer\.[a-z0-9]+)\.js$~',
$path );
}
/**
* Returns domain for path
*
* @param array $domains
* @param string $path
* @return string
*/
function _get_domain( $domains, $path ) {
$count = count( $domains );
if ( isset( $domains['http_default'] ) )
$count--;
if ( isset( $domains['https_default'] ) )
$count--;
if ( $count ) {
/**
* Use for equal URLs same host to allow caching by browser
*/
$hash = $this->_get_hash( $path );
$domain = $domains[$hash % $count];
return $domain;
}
return false;
}
/**
* Returns integer hash for key
*
* @param string $key
* @return integer
*/
function _get_hash( $key ) {
$hash = abs( crc32( $key ) );
return $hash;
}
/**
* Returns scheme
*
* @return string
*/
function _get_scheme() {
switch ( $this->_config['ssl'] ) {
default:
case 'auto':
$scheme = ( Util_Environment::is_https() ? 'https' : 'http' );
break;
case 'enabled':
$scheme = 'https';
break;
case 'disabled':
$scheme = 'http';
break;
case 'rejected':
$scheme = 'http';
break;
}
return $scheme;
}
/**
* Write log entry
*
* @param string $local_path
* @param string $remote_path
* @param string $error
* @return bool|int
*/
function _log( $local_path, $remote_path, $error ) {
$data = sprintf( "[%s] [%s => %s] %s\n", date( 'r' ), $local_path,
$remote_path, $error );
$data = strtr( $data, '<>', '..' );
$filename = Util_Debug::log_filename( 'cdn' );
return @file_put_contents( $filename, $data, FILE_APPEND );
}
/**
* Our error handler
*
* @param integer $errno
* @param string $errstr
* @return boolean
*/
function _error_handler( $errno, $errstr ) {
$this->_last_error = $errstr;
return false;
}
/**
* Returns last error
*
* @return string
*/
function _get_last_error() {
return $this->_last_error;
}
/**
* Set our error handler
*
* @return void
*/
function _set_error_handler() {
set_error_handler( array(
$this,
'_error_handler'
) );
}
/**
* Restore prev error handler
*
* @return void
*/
function _restore_error_handler() {
restore_error_handler();
}
/**
* How and if headers should be set
*
* @return string W3TC_CDN_HEADER_NONE, W3TC_CDN_HEADER_UPLOADABLE,
* W3TC_CDN_HEADER_MIRRORING
*/
function headers_support() {
return W3TC_CDN_HEADER_NONE;
}
}