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BrowserCache_Environment.php
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BrowserCache_Environment.php
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<?php
namespace W3TC;
/**
* class BrowserCache_Environment
*/
class BrowserCache_Environment {
/**
* Fixes environment in each wp-admin request
*
* @param Config $config
* @param bool $force_all_checks
* @throws Util_Environment_Exceptions
*/
public function fix_on_wpadmin_request( $config, $force_all_checks ) {
$exs = new Util_Environment_Exceptions();
if ( $config->get_boolean( 'config.check' ) || $force_all_checks ) {
if ( $config->get_boolean( 'browsercache.enabled' ) ) {
$this->rules_cache_add( $config, $exs );
} else {
$this->rules_cache_remove( $exs );
}
if ( $config->get_boolean( 'browsercache.enabled' ) &&
$config->get_boolean( 'browsercache.no404wp' ) ) {
$this->rules_no404wp_add( $config, $exs );
} else {
$this->rules_no404wp_remove( $exs );
}
}
if ( count( $exs->exceptions() ) > 0 )
throw $exs;
}
/**
* Fixes environment once event occurs
*
* @throws Util_Environment_Exceptions
*/
public function fix_on_event( $config, $event, $old_config = null ) {
}
/**
* Fixes environment after plugin deactivation
*
* @throws Util_Environment_Exceptions
*/
public function fix_after_deactivation() {
$exs = new Util_Environment_Exceptions();
$this->rules_cache_remove( $exs );
$this->rules_no404wp_remove( $exs );
if ( count( $exs->exceptions() ) > 0 )
throw $exs;
}
/**
* Returns required rules for module
*
* @param Config $config
* @return array
*/
public function get_required_rules( $config ) {
if ( !$config->get_boolean( 'browsercache.enabled' ) )
return null;
$rewrite_rules = array();
if ( Dispatcher::should_browsercache_generate_rules_for_cdn( $config ) ) {
$domain = Dispatcher::get_cdn_domain();
$cdn_rules_path = sprintf( 'ftp://%s/%s', $domain,
Util_Rule::get_cdn_rules_path() );
$rewrite_rules[] = array(
'filename' => $cdn_rules_path,
'content' => $this->rules_cache_generate( $config, true )
);
}
$browsercache_rules_cache_path = Util_Rule::get_browsercache_rules_cache_path();
$rewrite_rules[] = array(
'filename' => $browsercache_rules_cache_path,
'content' => $this->rules_cache_generate( $config )
);
if ( $config->get_boolean( 'browsercache.no404wp' ) ) {
$browsercache_rules_no404wp_path =
Util_Rule::get_browsercache_rules_no404wp_path();
$rewrite_rules[] = array(
'filename' => $browsercache_rules_no404wp_path,
'content' => $this->rules_no404wp_generate( $config )
);
}
return $rewrite_rules;
}
/**
* Returns mime types
*
* @return array
*/
public function get_mime_types() {
$a = array(
'cssjs' => include W3TC_INC_DIR . '/mime/cssjs.php',
'html' => include W3TC_INC_DIR . '/mime/html.php',
'other' => include W3TC_INC_DIR . '/mime/other.php'
);
$other_compression = $a['other'];
unset( $other_compression['asf|asx|wax|wmv|wmx'] );
unset( $other_compression['avi'] );
unset( $other_compression['divx'] );
unset( $other_compression['gif'] );
unset( $other_compression['gz|gzip'] );
unset( $other_compression['jpg|jpeg|jpe'] );
unset( $other_compression['mid|midi'] );
unset( $other_compression['mov|qt'] );
unset( $other_compression['mp3|m4a'] );
unset( $other_compression['mp4|m4v'] );
unset( $other_compression['mpeg|mpg|mpe'] );
unset( $other_compression['png'] );
unset( $other_compression['ra|ram'] );
unset( $other_compression['tar'] );
unset( $other_compression['wma'] );
unset( $other_compression['zip'] );
$a['other_compression'] = $other_compression;
return $a;
}
/**
* Generate rules for FTP upload
*
* @param Config $config
* @return string
*/
public function rules_cache_generate_for_ftp( $config ) {
return $this->rules_cache_generate( $config, true );
}
/*
* rules cache
*/
/**
* Writes cache rules
*
* @throws Util_WpFile_FilesystemOperationException with S/FTP form if it can't get the required filesystem credentials
*/
private function rules_cache_add( $config, $exs ) {
Util_Rule::add_rules( $exs,
Util_Rule::get_browsercache_rules_cache_path(),
$this->rules_cache_generate( $config ),
W3TC_MARKER_BEGIN_BROWSERCACHE_CACHE,
W3TC_MARKER_END_BROWSERCACHE_CACHE,
array(
W3TC_MARKER_BEGIN_MINIFY_CORE => 0,
W3TC_MARKER_BEGIN_PGCACHE_CORE => 0,
W3TC_MARKER_BEGIN_BROWSERCACHE_NO404WP => 0,
W3TC_MARKER_BEGIN_WORDPRESS => 0,
W3TC_MARKER_END_PGCACHE_CACHE => strlen( W3TC_MARKER_END_PGCACHE_CACHE ) + 1,
W3TC_MARKER_END_MINIFY_CACHE => strlen( W3TC_MARKER_END_MINIFY_CACHE ) + 1
)
);
}
/**
* Removes cache directives
*
* @throws Util_WpFile_FilesystemOperationException with S/FTP form if it can't get the required filesystem credentials
*/
private function rules_cache_remove( $exs ) {
Util_Rule::remove_rules( $exs,
Util_Rule::get_browsercache_rules_cache_path(),
W3TC_MARKER_BEGIN_BROWSERCACHE_CACHE,
W3TC_MARKER_END_BROWSERCACHE_CACHE );
}
/**
* Returns cache rules
*
* @param Config $config
* @param bool $cdnftp
* @return string
*/
public function rules_cache_generate( $config, $cdnftp = false ) {
switch ( true ) {
case Util_Environment::is_apache():
case Util_Environment::is_litespeed():
return $this->rules_cache_generate_apache( $config );
case Util_Environment::is_nginx():
return $this->rules_cache_generate_nginx( $config, $cdnftp );
}
return '';
}
/**
* Returns cache rules
*
* @param Config $config
* @return string
*/
private function rules_cache_generate_apache( $config ) {
$mime_types2 = $this->get_mime_types();
$cssjs_types = $mime_types2['cssjs'];
$cssjs_types = array_unique( $cssjs_types );
$html_types = $mime_types2['html'];
$other_types = $mime_types2['other'];
$other_compression_types = $mime_types2['other_compression'];
$cssjs_expires = $config->get_boolean( 'browsercache.cssjs.expires' );
$html_expires = $config->get_boolean( 'browsercache.html.expires' );
$other_expires = $config->get_boolean( 'browsercache.other.expires' );
$cssjs_lifetime = $config->get_integer( 'browsercache.cssjs.lifetime' );
$html_lifetime = $config->get_integer( 'browsercache.html.lifetime' );
$other_lifetime = $config->get_integer( 'browsercache.other.lifetime' );
$compatibility = $config->get_boolean( 'pgcache.compatibility' );
$mime_types = array();
if ( $cssjs_expires && $cssjs_lifetime ) {
$mime_types = array_merge( $mime_types, $cssjs_types );
}
if ( $html_expires && $html_lifetime ) {
$mime_types = array_merge( $mime_types, $html_types );
}
if ( $other_expires && $other_lifetime ) {
$mime_types = array_merge( $mime_types, $other_types );
}
$rules = '';
$rules .= W3TC_MARKER_BEGIN_BROWSERCACHE_CACHE . "\n";
if ( count( $mime_types ) ) {
$rules .= "<IfModule mod_mime.c>\n";
foreach ( $mime_types as $ext => $mime_type ) {
$extensions = explode( '|', $ext );
if ( !is_array( $mime_type ) )
$mime_type = (array)$mime_type;
foreach ( $mime_type as $mime_type2 ) {
$rules .= " AddType " . $mime_type2;
foreach ( $extensions as $extension ) {
$rules .= " ." . $extension;
}
$rules .= "\n";
}
}
$rules .= "</IfModule>\n";
$rules .= "<IfModule mod_expires.c>\n";
$rules .= " ExpiresActive On\n";
if ( $cssjs_expires && $cssjs_lifetime ) {
foreach ( $cssjs_types as $mime_type ) {
$rules .= " ExpiresByType " . $mime_type . " A" . $cssjs_lifetime . "\n";
}
}
if ( $html_expires && $html_lifetime ) {
foreach ( $html_types as $mime_type ) {
$rules .= " ExpiresByType " . $mime_type . " A" . $html_lifetime . "\n";
}
}
if ( $other_expires && $other_lifetime ) {
foreach ( $other_types as $mime_type ) {
if ( is_array( $mime_type ) )
foreach ( $mime_type as $mime_type2 )
$rules .= " ExpiresByType " . $mime_type2 . " A" . $other_lifetime . "\n";
else
$rules .= " ExpiresByType " . $mime_type . " A" . $other_lifetime . "\n";
}
}
$rules .= "</IfModule>\n";
}
$cssjs_compression = $config->get_boolean( 'browsercache.cssjs.compression' );
$html_compression = $config->get_boolean( 'browsercache.html.compression' );
$other_compression = $config->get_boolean( 'browsercache.other.compression' );
if ( $cssjs_compression || $html_compression || $other_compression ) {
$compression_types = array();
if ( $cssjs_compression ) {
$compression_types = array_merge( $compression_types, $cssjs_types );
}
if ( $html_compression ) {
$compression_types = array_merge( $compression_types, $html_types );
}
if ( $other_compression ) {
$compression_types = array_merge( $compression_types,
$other_compression_types );
}
$rules .= "<IfModule mod_deflate.c>\n";
if ( $compatibility ) {
$rules .= " <IfModule mod_setenvif.c>\n";
$rules .= " BrowserMatch ^Mozilla/4 gzip-only-text/html\n";
$rules .= " BrowserMatch ^Mozilla/4\\.0[678] no-gzip\n";
$rules .= " BrowserMatch \\bMSIE !no-gzip !gzip-only-text/html\n";
$rules .= " BrowserMatch \\bMSI[E] !no-gzip !gzip-only-text/html\n";
$rules .= " </IfModule>\n";
}
if ( version_compare( $this->_get_server_version(), '2.3.7', '>=' ) ) {
$rules .= " <IfModule mod_filter.c>\n";
}
$rules .= " AddOutputFilterByType DEFLATE " . implode( ' ', $compression_types ) . "\n";
$rules .= " <IfModule mod_mime.c>\n";
$rules .= " # DEFLATE by extension\n";
$rules .= " AddOutputFilter DEFLATE js css htm html xml\n";
$rules .= " </IfModule>\n";
if ( version_compare( $this->_get_server_version(), '2.3.7', '>=' ) ) {
$rules .= " </IfModule>\n";
}
$rules .= "</IfModule>\n";
}
foreach ( $mime_types2 as $type => $extensions )
$rules .= $this->_rules_cache_generate_apache_for_type( $config,
$extensions, $type );
if ( $config->get_boolean( 'browsercache.security.hsts' ) ||
$config->get_boolean( 'browsercache.security.xfo' ) ||
$config->get_boolean( 'browsercache.security.xss' ) ||
$config->get_boolean( 'browsercache.security.xcto' ) ||
$config->get_boolean( 'browsercache.security.pkp' ) ||
$config->get_boolean( 'browsercache.security.csp' )
) {
$lifetime = $config->get_integer( 'browsercache.other.lifetime' );
$rules .= "<IfModule mod_headers.c>\n";
if ( $config->get_boolean( 'browsercache.security.hsts' ) ) {
$dir = $config->get_string( 'browsercache.security.hsts.directive' );
$rules .= " Header set Strict-Transport-Security \"max-age=$lifetime" . ( strpos( $dir,"inc" ) ? "; includeSubDomains" : "" ) . ( strpos( $dir, "pre" ) ? "; preload" : "" ) . "\"\n";
}
if ( $config->get_boolean( 'browsercache.security.xfo' ) ) {
$dir = $config->get_string( 'browsercache.security.xfo.directive' );
$url = trim( $config->get_string( 'browsercache.security.xfo.allow' ) );
if ( empty( $url ) ) {
$url = Util_Environment::home_url_maybe_https();
}
$rules .= " Header always append X-Frame-Options \"" . ( $dir == "same" ? "SAMEORIGIN" : ( $dir == "deny" ? "DENY" : "ALLOW-FROM $url" ) ) . "\"\n";
}
if ( $config->get_boolean( 'browsercache.security.xss' ) ) {
$dir = $config->get_string( 'browsercache.security.xss.directive' );
$rules .= " Header set X-XSS-Protection \"" . ( $dir == "block" ? "1; mode=block" : $dir ) . "\"\n";
}
if ( $config->get_boolean( 'browsercache.security.xcto' ) ) {
$rules .= " Header set X-Content-Type-Options \"nosniff\"\n";
}
if ( $config->get_boolean( 'browsercache.security.pkp' ) ) {
$pin = trim( $config->get_string( 'browsercache.security.pkp.pin' ) );
$pinbak = trim( $config->get_string( 'browsercache.security.pkp.pin.backup' ) );
$extra = $config->get_string( 'browsercache.security.pkp.extra' );
$url = trim( $config->get_string( 'browsercache.security.pkp.report.url' ) );
$rep_only = $config->get_string( 'browsercache.security.pkp.report.only' ) == '1' ? true : false;
$rules .= " Header set " . ( $rep_only ? "Public-Key-Pins-Report-Only" : "Public-Key-Pins" ) . " \"pin-sha256=\\\"$pin\\\"; pin-sha256=\\\"$pinbak\\\"; max-age=$lifetime" . ( strpos( $extra,"inc" ) ? "; includeSubDomains" : "" ) . ( !empty( $url ) ? "; report-uri=\\\"$url\\\"" : "" ) . "\"\n";
}
if ( $config->get_boolean( 'browsercache.security.referrer.policy' ) ) {
$dir = $config->get_string( 'browsercache.security.referrer.policy.directive' );
$rules .= " Header set Referrer-Policy \"" . ($dir == "0" ? "" : $dir ) . "\"\n";
}
if ( $config->get_boolean( 'browsercache.security.csp' ) ) {
$base = trim( $config->get_string( 'browsercache.security.csp.base' ) );
$frame = trim( $config->get_string( 'browsercache.security.csp.frame' ) );
$connect = trim( $config->get_string( 'browsercache.security.csp.connect' ) );
$font = trim( $config->get_string( 'browsercache.security.csp.font' ) );
$script = trim( $config->get_string( 'browsercache.security.csp.script' ) );
$style = trim( $config->get_string( 'browsercache.security.csp.style' ) );
$img = trim( $config->get_string( 'browsercache.security.csp.img' ) );
$media = trim( $config->get_string( 'browsercache.security.csp.media' ) );
$object = trim( $config->get_string( 'browsercache.security.csp.object' ) );
$plugin = trim( $config->get_string( 'browsercache.security.csp.plugin' ) );
$form = trim( $config->get_string( 'browsercache.security.csp.form' ) );
$frame_ancestors = trim( $config->get_string( 'browsercache.security.csp.frame.ancestors' ) );
$sandbox = $config->get_string( 'browsercache.security.csp.sandbox' );
$default = trim( $config->get_string( 'browsercache.security.csp.default' ) );
$dir = rtrim( ( !empty( $base ) ? "base-uri $base; " : "" ).
( !empty( $frame ) ? "frame-src $frame; " : "" ).
( !empty( $connect ) ? "connect-src $connect; " : "" ).
( !empty( $font ) ? "font-src $font; " : "" ).
( !empty( $script ) ? "script-src $script; " : "" ).
( !empty( $style ) ? "style-src $style; " : "" ).
( !empty( $img ) ? "img-src $img; " : "" ).
( !empty( $media ) ? "media-src $media; " : "" ).
( !empty( $object ) ? "object-src $object; " : "" ).
( !empty( $plugin ) ? "plugin-types $plugin; " : "" ).
( !empty( $form ) ? "form-action $form; " : "" ).
( !empty( $frame_ancestors ) ? "frame-ancestors $frame_ancestors; " : "" ).
( !empty( $sandbox ) ? "sandbox " . trim( $sandbox ) . "; " : "" ).
( !empty( $default ) ? "default-src $default;" : "" ), "; " );
if ( !empty( $dir ) ) {
$rules .= " Header set Content-Security-Policy \"$dir\"\n";
}
}
$rules .= "</IfModule>\n";
}
if ( $config->get_boolean( 'browsercache.rewrite' ) ) {
$core = Dispatcher::component( 'BrowserCache_Core' );
$extensions = $core->get_replace_extensions( $config );
$rules .= "<IfModule mod_rewrite.c>\n";
$rules .= " RewriteCond %{REQUEST_FILENAME} !-f\n";
$rules .= ' RewriteRule ^(.+)\.(x[0-9]{5})\.(' .
implode( '|', $extensions ) . ')$ $1.$3 [L]' . "\n";
$rules .= "</IfModule>\n";
}
$rules .= W3TC_MARKER_END_BROWSERCACHE_CACHE . "\n";
return $rules;
}
/**
* Writes cache rules
*
* @param Config $config
* @param array $mime_types
* @param string $section
* @return string
*/
private function _rules_cache_generate_apache_for_type( $config, $mime_types,
$section ) {
$is_disc_enhanced = $config->get_boolean( 'pgcache.enabled' ) &&
$config->get_string( 'pgcache.engine' ) == 'file_generic';
$cache_control = $config->get_boolean( 'browsercache.' . $section . '.cache.control' );
$etag = $config->get_boolean( 'browsercache.' . $section . '.etag' );
$w3tc = $config->get_boolean( 'browsercache.' . $section . '.w3tc' );
$unset_setcookie = $config->get_boolean( 'browsercache.' . $section . '.nocookies' );
$set_last_modified = $config->get_boolean( 'browsercache.' . $section . '.last_modified' );
$compatibility = $config->get_boolean( 'pgcache.compatibility' );
$extensions = array_keys( $mime_types );
// Remove ext from filesmatch if its the same as permalink extension
$pext = strtolower( pathinfo( get_option( 'permalink_structure' ), PATHINFO_EXTENSION ) );
if ( $pext ) {
$extensions = $this->_remove_extension_from_list( $extensions, $pext );
}
$extensions_lowercase = array_map( 'strtolower', $extensions );
$extensions_uppercase = array_map( 'strtoupper', $extensions );
$rules = '';
$headers_rules = '';
if ( $section == 'html' ) {
$headers_rules .= " Header append Vary User-Agent env=!dont-vary\n";
}
if ( $cache_control ) {
$cache_policy = $config->get_string( 'browsercache.' . $section . '.cache.policy' );
switch ( $cache_policy ) {
case 'cache':
$headers_rules .= " Header set Pragma \"public\"\n";
$headers_rules .= " Header set Cache-Control \"public\"\n";
break;
case 'cache_public_maxage':
$expires = $config->get_boolean( 'browsercache.' . $section . '.expires' );
$lifetime = $config->get_integer( 'browsercache.' . $section . '.lifetime' );
$headers_rules .= " Header set Pragma \"public\"\n";
if ( $expires )
$headers_rules .= " Header append Cache-Control \"public\"\n";
else
$headers_rules .= " Header set Cache-Control \"max-age=" . $lifetime . ", public\"\n";
break;
case 'cache_validation':
$headers_rules .= " Header set Pragma \"public\"\n";
$headers_rules .= " Header set Cache-Control \"public, must-revalidate, proxy-revalidate\"\n";
break;
case 'cache_noproxy':
$headers_rules .= " Header set Pragma \"public\"\n";
$headers_rules .= " Header set Cache-Control \"private, must-revalidate\"\n";
break;
case 'cache_maxage':
$expires = $config->get_boolean( 'browsercache.' . $section . '.expires' );
$lifetime = $config->get_integer( 'browsercache.' . $section . '.lifetime' );
$headers_rules .= " Header set Pragma \"public\"\n";
if ( $expires )
$headers_rules .= " Header append Cache-Control \"public, must-revalidate, proxy-revalidate\"\n";
else
$headers_rules .= " Header set Cache-Control \"max-age=" . $lifetime . ", public, must-revalidate, proxy-revalidate\"\n";
break;
case 'no_cache':
$headers_rules .= " Header set Pragma \"no-cache\"\n";
$headers_rules .= " Header set Cache-Control \"max-age=0, private, no-store, no-cache, must-revalidate\"\n";
break;
}
}
if ( $etag ) {
$rules .= " FileETag MTime Size\n";
} else {
if ( $compatibility ) {
$rules .= " FileETag None\n";
$headers_rules .= " Header unset ETag\n";
}
}
if ( $unset_setcookie )
$headers_rules .= " Header unset Set-Cookie\n";
if ( !$set_last_modified )
$headers_rules .= " Header unset Last-Modified\n";
if ( $w3tc )
$headers_rules .= " Header set X-Powered-By \"" .
Util_Environment::w3tc_header() . "\"\n";
if ( strlen( $headers_rules ) > 0 ) {
$rules .= " <IfModule mod_headers.c>\n";
$rules .= $headers_rules;
$rules .= " </IfModule>\n";
}
if ( strlen( $rules ) > 0 ) {
$rules = "<FilesMatch \"\\.(" . implode( '|',
array_merge( $extensions_lowercase, $extensions_uppercase ) ) .
")$\">\n" . $rules;
$rules .= "</FilesMatch>\n";
}
return $rules;
}
/**
* Returns cache rules
*
* @param Config $config
* @param bool $cdnftp
* @return string
*/
private function rules_cache_generate_nginx( $config, $cdnftp = false ) {
$mime_types = $this->get_mime_types();
$cssjs_types = $mime_types['cssjs'];
$cssjs_types = array_unique( $cssjs_types );
$html_types = $mime_types['html'];
$other_types = $mime_types['other'];
$other_compression_types = $mime_types['other_compression'];
$rules = '';
$rules .= W3TC_MARKER_BEGIN_BROWSERCACHE_CACHE . "\n";
if ( $config->get_boolean( 'browsercache.rewrite' ) ) {
$core = Dispatcher::component( 'BrowserCache_Core' );
$extensions = $core->get_replace_extensions( $config );
$rules .= 'location ~ "^(?<w3tcbc_base>.+)\.(x[0-9]{5})' .
'(?<w3tcbc_ext>\.(' . implode( '|', $extensions ) . '))$" {' . "\n";
$rules .= ' if (-f $document_root$w3tcbc_base$w3tcbc_ext) {' . "\n";
$rules .= ' rewrite .* $w3tcbc_base$w3tcbc_ext;' . "\n";
$rules .= " }\n";
$rules .= "}\n";
}
$cssjs_compression = $config->get_boolean( 'browsercache.cssjs.compression' );
$html_compression = $config->get_boolean( 'browsercache.html.compression' );
$other_compression = $config->get_boolean( 'browsercache.other.compression' );
if ( $cssjs_compression || $html_compression || $other_compression ) {
$compression_types = array();
if ( $cssjs_compression ) {
$compression_types = array_merge( $compression_types, $cssjs_types );
}
if ( $html_compression ) {
$compression_types = array_merge( $compression_types, $html_types );
}
if ( $other_compression ) {
$compression_types = array_merge( $compression_types,
$other_compression_types );
}
unset( $compression_types['html|htm'] );
// some nginx cant handle values longer than 47 chars
unset( $compression_types['odp'] );
$rules .= "gzip on;\n";
$rules .= "gzip_types " .
implode( ' ', array_unique( $compression_types ) ) . ";\n";
}
if ( $config->get_boolean( 'browsercache.no404wp' ) ) {
$exceptions = $config->get_array( 'browsercache.no404wp.exceptions' );
$impoloded = implode( '|', $exceptions );
if ( !empty( $impoloded ) ) {
$wp_uri = network_home_url( '', 'relative' );
$wp_uri = rtrim( $wp_uri, '/' );
$rules .= "location ~ (" . $impoloded . ") {\n";
$rules .= ' try_files $uri $uri/ $uri.html ' . $wp_uri .
'/index.php?$args;' . "\n";
$rules .= "}\n";
}
}
foreach ( $mime_types as $type => $extensions )
$this->_rules_cache_generate_nginx_for_type( $config, $rules,
$extensions, $type );
if ( $config->get_boolean( 'browsercache.security.hsts' ) ||
$config->get_boolean( 'browsercache.security.xfo' ) ||
$config->get_boolean( 'browsercache.security.xss' ) ||
$config->get_boolean( 'browsercache.security.xcto' ) ||
$config->get_boolean( 'browsercache.security.pkp' ) ||
$config->get_boolean( 'browsercache.security.referrer.policy' ) ||
$config->get_boolean( 'browsercache.security.csp' )
) {
$lifetime = $config->get_integer( 'browsercache.other.lifetime' );
if ( $config->get_boolean( 'browsercache.security.hsts' ) ) {
$dir = $config->get_string( 'browsercache.security.hsts.directive' );
$rules .= "add_header Strict-Transport-Security \"max-age=$lifetime" . ( strpos( $dir,"inc" ) ? "; includeSubDomains" : "" ) . ( strpos( $dir, "pre" ) ? "; preload" : "" ) . "\";\n";
}
if ( $config->get_boolean( 'browsercache.security.xfo' ) ) {
$dir = $config->get_string( 'browsercache.security.xfo.directive' );
$url = trim( $config->get_string( 'browsercache.security.xfo.allow' ) );
if ( empty( $url ) ) {
$url = Util_Environment::home_url_maybe_https();
}
$rules .= "add_header X-Frame-Options \"" . ( $dir == "same" ? "SAMEORIGIN" : ( $dir == "deny" ? "DENY" : "ALLOW-FROM $url" ) ) . "\";\n";
}
if ( $config->get_boolean( 'browsercache.security.xss' ) ) {
$dir = $config->get_string( 'browsercache.security.xss.directive' );
$rules .= "add_header X-XSS-Protection \"" . ( $dir == "block" ? "1; mode=block" : $dir ) . "\";\n";
}
if ( $config->get_boolean( 'browsercache.security.xcto' ) ) {
$rules .= "add_header X-Content-Type-Options \"nosniff\";\n";
}
if ( $config->get_boolean( 'browsercache.security.pkp' ) ) {
$pin = trim( $config->get_string( 'browsercache.security.pkp.pin' ) );
$pinbak = trim( $config->get_string( 'browsercache.security.pkp.pin.backup' ) );
$extra = $config->get_string( 'browsercache.security.pkp.extra' );
$url = trim( $config->get_string( 'browsercache.security.pkp.report.url' ) );
$rep_only = $config->get_string( 'browsercache.security.pkp.report.only' ) == '1' ? true : false;
$rules .= "add_header " . ( $rep_only ? "Public-Key-Pins-Report-Only" : "Public-Key-Pins" ) . " 'pin-sha256=\"$pin\"; pin-sha256=\"$pinbak\"; max-age=$lifetime" . ( strpos( $extra,"inc" ) ? "; includeSubDomains" : "" ) . ( !empty( $url ) ? "; report-uri=\"$url\"" : "" ) . "';\n";
}
if ( $config->get_boolean( 'browsercache.security.referrer.policy' ) ) {
$dir = $config->get_string( 'browsercache.security.referrer.policy.directive' );
$rules .= "add_header Referrer-Policy \"" . ( $dir == "0" ? "" : $dir ) . "\";\n";
}
if ( $config->get_boolean( 'browsercache.security.csp' ) ) {
$base = trim( $config->get_string( 'browsercache.security.csp.base' ) );
$frame = trim( $config->get_string( 'browsercache.security.csp.frame' ) );
$connect = trim( $config->get_string( 'browsercache.security.csp.connect' ) );
$font = trim( $config->get_string( 'browsercache.security.csp.font' ) );
$script = trim( $config->get_string( 'browsercache.security.csp.script' ) );
$style = trim( $config->get_string( 'browsercache.security.csp.style' ) );
$img = trim( $config->get_string( 'browsercache.security.csp.img' ) );
$media = trim( $config->get_string( 'browsercache.security.csp.media' ) );
$object = trim( $config->get_string( 'browsercache.security.csp.object' ) );
$plugin = trim( $config->get_string( 'browsercache.security.csp.plugin' ) );
$form = trim( $config->get_string( 'browsercache.security.csp.form' ) );
$frame_ancestors = trim( $config->get_string( 'browsercache.security.csp.frame.ancestors' ) );
$sandbox = $config->get_string( 'browsercache.security.csp.sandbox' );
$default = trim( $config->get_string( 'browsercache.security.csp.default' ) );
$dir = rtrim( ( !empty( $base ) ? "base-uri $base; " : "" ).
( !empty( $frame ) ? "frame-src $frame; " : "" ).
( !empty( $connect ) ? "connect-src $connect; " : "" ).
( !empty( $font ) ? "font-src $font; " : "" ).
( !empty( $script ) ? "script-src $script; " : "" ).
( !empty( $style ) ? "style-src $style; " : "" ).
( !empty( $img ) ? "img-src $img; " : "" ).
( !empty( $media ) ? "media-src $media; " : "" ).
( !empty( $object ) ? "object-src $object; " : "" ).
( !empty( $plugin ) ? "plugin-types $plugin; " : "" ).
( !empty( $form ) ? "form-action $form; " : "" ).
( !empty( $frame_ancestors ) ? "frame-ancestors $frame_ancestors; " : "" ).
( !empty( $sandbox ) ? "sandbox " . trim( $sandbox ) . "; " : "" ).
( !empty( $default ) ? "default-src $default;" : "" ), "; " );
if ( !empty( $dir ) ) {
$rules .= "add_header Content-Security-Policy \"$dir\";\n";
}
}
}
$rules .= W3TC_MARKER_END_BROWSERCACHE_CACHE . "\n";
return $rules;
}
/**
* Adds cache rules for type to &$rules
*
* @param Config $config
* @param string $rules
* @param array $mime_types
* @param string $section
* @return void
*/
private function _rules_cache_generate_nginx_for_type( $config, &$rules,
$mime_types, $section ) {
$expires = $config->get_boolean( 'browsercache.' . $section . '.expires' );
$cache_control = $config->get_boolean( 'browsercache.' . $section . '.cache.control' );
$w3tc = $config->get_boolean( 'browsercache.' . $section . '.w3tc' );
if ( $expires || $cache_control || $w3tc ) {
$lifetime = $config->get_integer( 'browsercache.' . $section . '.lifetime' );
$extensions = array_keys( $mime_types );
// Remove ext from filesmatch if its the same as permalink extension
$pext = strtolower( pathinfo( get_option( 'permalink_structure' ), PATHINFO_EXTENSION ) );
if ( $pext ) {
$extensions = $this->_remove_extension_from_list( $extensions, $pext );
}
$rules .= "location ~ \\.(" . implode( '|', $extensions ) . ")$ {\n";
if ( $expires ) {
$rules .= " expires " . $lifetime . "s;\n";
}
$add_header_rules = '';
if ( $cache_control ) {
$cache_policy = $config->get_string( 'browsercache.' . $section . '.cache.policy' );
switch ( $cache_policy ) {
case 'cache':
$add_header_rules .= " add_header Pragma \"public\";\n";
$add_header_rules .= " add_header Cache-Control \"public\";\n";
break;
case 'cache_public_maxage':
$add_header_rules .= " add_header Pragma \"public\";\n";
$add_header_rules .= " add_header Cache-Control \"max-age=" . $lifetime . ", public\";\n";
break;
case 'cache_validation':
$add_header_rules .= " add_header Pragma \"public\";\n";
$add_header_rules .= " add_header Cache-Control \"public, must-revalidate, proxy-revalidate\";\n";
break;
case 'cache_noproxy':
$add_header_rules .= " add_header Pragma \"public\";\n";
$add_header_rules .= " add_header Cache-Control \"private, must-revalidate\";\n";
break;
case 'cache_maxage':
$add_header_rules .= " add_header Pragma \"public\";\n";
$add_header_rules .= " add_header Cache-Control \"max-age=" . $lifetime . ", public, must-revalidate, proxy-revalidate\";\n";
break;
case 'no_cache':
$add_header_rules .= " add_header Pragma \"no-cache\";\n";
$add_header_rules .= " add_header Cache-Control \"max-age=0, private, no-store, no-cache, must-revalidate\";\n";
break;
}
}
if ( $w3tc ) {
$add_header_rules .= " add_header X-Powered-By \"" .
Util_Environment::w3tc_header() . "\";\n";
}
$rules .= $add_header_rules;
$rules .= Dispatcher::on_browsercache_rules_generation_for_section(
$config, false, $section, $add_header_rules );
if ( !$config->get_boolean( 'browsercache.no404wp' ) ) {
$wp_uri = network_home_url( '', 'relative' );
$wp_uri = rtrim( $wp_uri, '/' );
$rules .= ' try_files $uri $uri/ $uri.html ' . $wp_uri .
'/index.php?$args;' . "\n";
}
$rules .= "}\n";
}
}
/*
* rules_no404wp
*/
/**
* Writes no 404 by WP rules
*
* @param Config $config
* @param Util_Environment_Exceptions $exs
* @throws Util_WpFile_FilesystemOperationException with S/FTP form
*/
private function rules_no404wp_add( $config, $exs ) {
Util_Rule::add_rules( $exs, Util_Rule::get_browsercache_rules_no404wp_path(),
$this->rules_no404wp_generate( $config ),
W3TC_MARKER_BEGIN_BROWSERCACHE_NO404WP,
W3TC_MARKER_END_BROWSERCACHE_NO404WP,
array(
W3TC_MARKER_BEGIN_WORDPRESS => 0,
W3TC_MARKER_END_PGCACHE_CORE =>
strlen( W3TC_MARKER_END_PGCACHE_CORE ) + 1,
W3TC_MARKER_END_MINIFY_CORE =>
strlen( W3TC_MARKER_END_MINIFY_CORE ) + 1,
W3TC_MARKER_END_BROWSERCACHE_CACHE =>
strlen( W3TC_MARKER_END_BROWSERCACHE_CACHE ) + 1,
W3TC_MARKER_END_PGCACHE_CACHE =>
strlen( W3TC_MARKER_END_PGCACHE_CACHE ) + 1,
W3TC_MARKER_END_MINIFY_CACHE =>
strlen( W3TC_MARKER_END_MINIFY_CACHE ) + 1
)
);
}
/**
* Removes 404 directives
*
* @throws Util_WpFile_FilesystemOperationException with S/FTP form
*/
private function rules_no404wp_remove( $exs ) {
Util_Rule::remove_rules( $exs,
Util_Rule::get_browsercache_rules_no404wp_path(),
W3TC_MARKER_BEGIN_BROWSERCACHE_NO404WP,
W3TC_MARKER_END_BROWSERCACHE_NO404WP
);
}
/**
* Generate rules related to prevent for media 404 error by WP
*
* @param Config $config
* @return string
*/
private function rules_no404wp_generate( $config ) {
switch ( true ) {
case Util_Environment::is_apache():
case Util_Environment::is_litespeed():
return $this->rules_no404wp_generate_apache( $config );
}
return false;
}
/**
* Generate rules related to prevent for media 404 error by WP
*
* @param Config $config
* @return string
*/
private function rules_no404wp_generate_apache( $config ) {
$a = $this->get_mime_types();
$cssjs_types = $a['cssjs'];
$html_types = $a['html'];
$other_types = $a['other'];
$extensions = array_merge( array_keys( $cssjs_types ),
array_keys( $html_types ), array_keys( $other_types ) );
$permalink_structure = get_option( 'permalink_structure' );
$permalink_structure_ext = ltrim( strrchr( $permalink_structure, '.' ),
'.' );
if ( $permalink_structure_ext != '' ) {
foreach ( $extensions as $index => $extension ) {
if ( strstr( $extension, $permalink_structure_ext ) !== false ) {
$extensions[$index] = preg_replace( '~\|?' .
Util_Environment::preg_quote( $permalink_structure_ext ) .
'\|?~', '', $extension );
}
}
}
$exceptions = $config->get_array( 'browsercache.no404wp.exceptions' );
$wp_uri = network_home_url( '', 'relative' );
$wp_uri = rtrim( $wp_uri, '/' );
$rules = '';
$rules .= W3TC_MARKER_BEGIN_BROWSERCACHE_NO404WP . "\n";
$rules .= "<IfModule mod_rewrite.c>\n";
$rules .= " RewriteEngine On\n";
// in subdir - rewrite theme files and similar to upper folder if file exists
if ( Util_Environment::is_wpmu() &&
!Util_Environment::is_wpmu_subdomain() ) {
$rules .= " RewriteCond %{REQUEST_FILENAME} !-f\n";
$rules .= " RewriteCond %{REQUEST_FILENAME} !-d\n";
$rules .= " RewriteCond %{REQUEST_URI} ^$wp_uri/([_0-9a-zA-Z-]+/)(.*\.)(" .
implode( '|', $extensions ) . ")$ [NC]\n";
$document_root = Util_Rule::apache_docroot_variable();
$rules .= ' RewriteCond "' . $document_root . $wp_uri .
'/%2%3" -f' . "\n";
$rules .= " RewriteRule .* $wp_uri/%2%3 [L]\n\n";
}
$rules .= " RewriteCond %{REQUEST_FILENAME} !-f\n";
$rules .= " RewriteCond %{REQUEST_FILENAME} !-d\n";
$imploded = implode( '|', $exceptions );
if ( !empty( $imploded ) )
$rules .= " RewriteCond %{REQUEST_URI} !(" . $imploded. ")\n";
$rules .= " RewriteCond %{REQUEST_URI} \\.(" .
implode( '|', $extensions ) . ")$ [NC]\n";
$rules .= " RewriteRule .* - [L]\n";
$rules .= "</IfModule>\n";
$rules .= W3TC_MARKER_END_BROWSERCACHE_NO404WP . "\n";
return $rules;
}
/**
* Returns the apache, nginx version
*
* @return string
*/
private function _get_server_version() {
$sig= explode( '/', $_SERVER['SERVER_SOFTWARE'] );
$temp = isset( $sig[1] ) ? explode( ' ', $sig[1] ) : array( '0' );
$version = $temp[0];
return $version;
}
/**
* Takes an array of extensions single per row and/or extensions delimited by |
*
* @param unknown $extensions
* @param unknown $ext
* @return array
*/
private function _remove_extension_from_list( $extensions, $ext ) {
for ( $i = 0; $i < sizeof( $extensions ); $i++ ) {
if ( $extensions[$i] == $ext ) {
unset( $extensions[$i] );
return $extensions;
} elseif ( strpos( $extensions[$i], $ext ) !== false &&
strpos( $extensions[$i], '|' ) !== false ) {
$exts = explode( '|', $extensions[$i] );
$key = array_search( $ext, $exts );
unset( $exts[$key] );
$extensions[$i] = implode( '|', $exts );
return $extensions;
}
}
return $extensions;
}
}