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BrowserCache_Environment_Nginx.php
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<?php
/**
* File: BrowserCache_Environment_Nginx.php
*
* @package W3TC
*/
namespace W3TC;
/**
* Class BrowserCache_Environment_Nginx
*
* Rules generation for Nginx
*
* phpcs:disable Squiz.Strings.DoubleQuoteUsage.NotRequired
*/
class BrowserCache_Environment_Nginx {
/**
* Config
*
* @var Config
*/
private $c;
/**
* Constructor
*
* @param Config $config Config.
*
* @return void
*/
public function __construct( $config ) {
$this->c = $config;
}
/**
* Returns required rules
*
* @param array $mime_types Mime types.
*
* @return array
*/
public function get_required_rules( $mime_types ) {
return array(
array(
'filename' => Util_Rule::get_nginx_rules_path(),
'content' => $this->generate( $mime_types ),
),
);
}
/**
* Returns cache rules
*
* @param array $mime_types Mime types.
* @param bool $cdnftp CDN FTP flag.
*
* @return string
*/
public function generate( $mime_types, $cdnftp = false ) {
$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 ( $this->c->get_boolean( 'browsercache.rewrite' ) ) {
$core = Dispatcher::component( 'BrowserCache_Core' );
$extensions = $core->get_replace_extensions( $this->c );
$exts = implode( '|', $extensions );
$rules .= "set \$w3tcbc_rewrite_filename '';\n";
$rules .= "set \$w3tcbc_rewrite_uri '';\n";
$rules .= "if (\$uri ~ '^(?<w3tcbc_base>.+)\.(x[0-9]{5})(?<w3tcbc_ext>\.($exts))$') {\n";
$rules .= " set \$w3tcbc_rewrite_filename \$document_root\$w3tcbc_base\$w3tcbc_ext;\n";
$rules .= " set \$w3tcbc_rewrite_uri \$w3tcbc_base\$w3tcbc_ext;\n";
$rules .= "}\n";
if ( Util_Environment::is_wpmu() && ! Util_Environment::is_wpmu_subdomain() ) {
// WPMU subdir extra rewrite.
if ( defined( 'W3TC_HOME_URI' ) ) {
$home_uri = W3TC_HOME_URI;
} else {
$primary_blog_id = get_network()->site_id;
$home_uri = wp_parse_url( get_home_url( $primary_blog_id ), PHP_URL_PATH );
$home_uri = rtrim( $home_uri, '/' );
}
$rules .= "if (\$uri ~ '^$home_uri/[_0-9a-zA-Z-]+(?<w3tcbc_base>/wp-.+)\.(x[0-9]{5})(?<w3tcbc_ext>\.($exts))$') {\n";
$rules .= " set \$w3tcbc_rewrite_filename \$document_root$home_uri\$w3tcbc_base\$w3tcbc_ext;\n";
$rules .= " set \$w3tcbc_rewrite_uri $home_uri\$w3tcbc_base\$w3tcbc_ext;\n";
$rules .= "}\n";
}
$rules .= "if (-f \$w3tcbc_rewrite_filename) {\n";
$rules .= " rewrite .* \$w3tcbc_rewrite_uri;\n";
$rules .= "}\n";
}
$cssjs_brotli = $this->c->get_boolean( 'browsercache.cssjs.brotli' );
$html_brotli = $this->c->get_boolean( 'browsercache.html.brotli' );
$other_brotli = $this->c->get_boolean( 'browsercache.other.brotli' );
if ( $cssjs_brotli || $html_brotli || $other_brotli ) {
$brotli_types = array();
if ( $cssjs_brotli ) {
$brotli_types = array_merge( $brotli_types, $cssjs_types );
}
if ( $html_brotli ) {
$brotli_types = array_merge( $brotli_types, $html_types );
}
if ( $other_brotli ) {
$brotli_types = array_merge( $brotli_types, $other_compression_types );
}
unset( $brotli_types['html|htm'] );
// some nginx cant handle values longer than 47 chars.
unset( $brotli_types['odp'] );
$rules .= "brotli on;\n";
$rules .= 'brotli_types ' . implode( ' ', array_unique( $brotli_types ) ) . ";\n";
}
$cssjs_compression = $this->c->get_boolean( 'browsercache.cssjs.compression' );
$html_compression = $this->c->get_boolean( 'browsercache.html.compression' );
$other_compression = $this->c->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 ( $this->c->get_boolean( 'browsercache.no404wp' ) ) {
$exceptions = $this->c->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/ ' . $wp_uri . '/index.php?$args;' . "\n";
$rules .= "}\n";
}
}
$this->generate_section( $rules, $mime_types['cssjs'], 'cssjs' );
$this->generate_section( $rules, $mime_types['html'], 'html' );
$this->generate_section( $rules, $mime_types['other'], 'other' );
$rules .= implode( "\n", $this->security_rules() ) . "\n";
$rules .= W3TC_MARKER_END_BROWSERCACHE_CACHE . "\n";
return $rules;
}
/**
* Returns security header directives
*
* @return array
*/
private function security_rules() {
$rules = array();
if ( $this->c->get_boolean( 'browsercache.hsts' ) ||
$this->c->get_boolean( 'browsercache.security.xfo' ) ||
$this->c->get_boolean( 'browsercache.security.xss' ) ||
$this->c->get_boolean( 'browsercache.security.xcto' ) ||
$this->c->get_boolean( 'browsercache.security.pkp' ) ||
$this->c->get_boolean( 'browsercache.security.referrer.policy' ) ||
$this->c->get_boolean( 'browsercache.security.csp' ) ||
$this->c->get_boolean( 'browsercache.security.cspro' ) ||
$this->c->get_boolean( 'browsercache.security.fp' )
) {
$lifetime = $this->c->get_integer( 'browsercache.other.lifetime' );
if ( $this->c->get_boolean( 'browsercache.hsts' ) ) {
$dir = $this->c->get_string( 'browsercache.security.hsts.directive' );
$rules[] = "add_header Strict-Transport-Security \"max-age=$lifetime" . ( strpos( $dir, "inc" ) ? "; includeSubDomains" : "" ) . ( strpos( $dir, "pre" ) ? "; preload" : "" ) . "\";";
}
if ( $this->c->get_boolean( 'browsercache.security.xfo' ) ) {
$dir = $this->c->get_string( 'browsercache.security.xfo.directive' );
$url = trim( $this->c->get_string( 'browsercache.security.xfo.allow' ) );
if ( empty( $url ) ) {
$url = Util_Environment::home_url_maybe_https();
}
$rules[] = "add_header X-Frame-Options \"" . ( 'same' === $dir ? "SAMEORIGIN" : ( 'deny' === $dir ? "DENY" : "ALLOW-FROM $url" ) ) . "\";";
}
if ( $this->c->get_boolean( 'browsercache.security.xss' ) ) {
$dir = $this->c->get_string( 'browsercache.security.xss.directive' );
$rules[] = "add_header X-XSS-Protection \"" . ( 'block' === $dir ? "1; mode=block" : $dir ) . "\";";
}
if ( $this->c->get_boolean( 'browsercache.security.xcto' ) ) {
$rules[] = "add_header X-Content-Type-Options \"nosniff\";";
}
if ( $this->c->get_boolean( 'browsercache.security.pkp' ) ) {
$pin = trim( $this->c->get_string( 'browsercache.security.pkp.pin' ) );
$pinbak = trim( $this->c->get_string( 'browsercache.security.pkp.pin.backup' ) );
$extra = $this->c->get_string( 'browsercache.security.pkp.extra' );
$url = trim( $this->c->get_string( 'browsercache.security.pkp.report.url' ) );
$rep_only = '1' === $this->c->get_string( 'browsercache.security.pkp.report.only' ) ? 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\"" : "" ) . "';";
}
if ( $this->c->get_boolean( 'browsercache.security.referrer.policy' ) ) {
$dir = $this->c->get_string( 'browsercache.security.referrer.policy.directive' );
$rules[] = "add_header Referrer-Policy \"" . ( '0' === $dir ? "" : $dir ) . "\";";
}
if ( $this->c->get_boolean( 'browsercache.security.csp' ) ) {
$base = trim( $this->c->get_string( 'browsercache.security.csp.base' ) );
$frame = trim( $this->c->get_string( 'browsercache.security.csp.frame' ) );
$connect = trim( $this->c->get_string( 'browsercache.security.csp.connect' ) );
$font = trim( $this->c->get_string( 'browsercache.security.csp.font' ) );
$script = trim( $this->c->get_string( 'browsercache.security.csp.script' ) );
$style = trim( $this->c->get_string( 'browsercache.security.csp.style' ) );
$img = trim( $this->c->get_string( 'browsercache.security.csp.img' ) );
$media = trim( $this->c->get_string( 'browsercache.security.csp.media' ) );
$object = trim( $this->c->get_string( 'browsercache.security.csp.object' ) );
$plugin = trim( $this->c->get_string( 'browsercache.security.csp.plugin' ) );
$form = trim( $this->c->get_string( 'browsercache.security.csp.form' ) );
$frame_ancestors = trim( $this->c->get_string( 'browsercache.security.csp.frame.ancestors' ) );
$sandbox = trim( $this->c->get_string( 'browsercache.security.csp.sandbox' ) );
$child = trim( $this->c->get_string( 'browsercache.security.csp.child' ) );
$manifest = trim( $this->c->get_string( 'browsercache.security.csp.manifest' ) );
$scriptelem = trim( $this->c->get_string( 'browsercache.security.csp.scriptelem' ) );
$scriptattr = trim( $this->c->get_string( 'browsercache.security.csp.scriptattr' ) );
$styleelem = trim( $this->c->get_string( 'browsercache.security.csp.styleelem' ) );
$styleattr = trim( $this->c->get_string( 'browsercache.security.csp.styleattr' ) );
$worker = trim( $this->c->get_string( 'browsercache.security.csp.worker' ) );
$default = trim( $this->c->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 $sandbox; " : '' ) .
( ! empty( $child ) ? "child-src $child; " : '' ) .
( ! empty( $manifest ) ? "manifest-src $manifest; " : '' ) .
( ! empty( $scriptelem ) ? "script-src-elem $scriptelem; " : '' ) .
( ! empty( $scriptattr ) ? "script-src-attr $scriptattr; " : '' ) .
( ! empty( $styleelem ) ? "style-src-elem $styleelem; " : '' ) .
( ! empty( $styleattr ) ? "style-src-attr $styleattr; " : '' ) .
( ! empty( $worker ) ? "worker-src $worker; " : '' ) .
( ! empty( $default ) ? "default-src $default;" : '' ),
'; '
);
if ( ! empty( $dir ) ) {
$rules[] = "add_header Content-Security-Policy \"$dir\";";
}
}
if ( $this->c->get_boolean( 'browsercache.security.cspro' ) && ( ! empty( $this->c->get_string( 'browsercache.security.cspro.reporturi' ) ) || ! empty( $this->c->get_string( 'browsercache.security.cspro.reportto' ) ) ) ) {
$base = trim( $this->c->get_string( 'browsercache.security.cspro.base' ) );
$reporturi = trim( $this->c->get_string( 'browsercache.security.cspro.reporturi' ) );
$reportto = trim( $this->c->get_string( 'browsercache.security.cspro.reportto' ) );
$frame = trim( $this->c->get_string( 'browsercache.security.cspro.frame' ) );
$connect = trim( $this->c->get_string( 'browsercache.security.cspro.connect' ) );
$font = trim( $this->c->get_string( 'browsercache.security.cspro.font' ) );
$script = trim( $this->c->get_string( 'browsercache.security.cspro.script' ) );
$style = trim( $this->c->get_string( 'browsercache.security.cspro.style' ) );
$img = trim( $this->c->get_string( 'browsercache.security.cspro.img' ) );
$media = trim( $this->c->get_string( 'browsercache.security.cspro.media' ) );
$object = trim( $this->c->get_string( 'browsercache.security.cspro.object' ) );
$plugin = trim( $this->c->get_string( 'browsercache.security.cspro.plugin' ) );
$form = trim( $this->c->get_string( 'browsercache.security.cspro.form' ) );
$frame_ancestors = trim( $this->c->get_string( 'browsercache.security.cspro.frame.ancestors' ) );
$sandbox = trim( $this->c->get_string( 'browsercache.security.cspro.sandbox' ) );
$child = trim( $this->c->get_string( 'browsercache.security.csp.child' ) );
$manifest = trim( $this->c->get_string( 'browsercache.security.csp.manifest' ) );
$scriptelem = trim( $this->c->get_string( 'browsercache.security.csp.scriptelem' ) );
$scriptattr = trim( $this->c->get_string( 'browsercache.security.csp.scriptattr' ) );
$styleelem = trim( $this->c->get_string( 'browsercache.security.csp.styleelem' ) );
$styleattr = trim( $this->c->get_string( 'browsercache.security.csp.styleattr' ) );
$worker = trim( $this->c->get_string( 'browsercache.security.csp.worker' ) );
$default = trim( $this->c->get_string( 'browsercache.security.cspro.default' ) );
$dir = rtrim(
( ! empty( $base ) ? "base-uri $base; " : '' ) .
( ! empty( $reporturi ) ? "report-uri $reporturi; " : '' ) .
( ! empty( $reportto ) ? "report-to $reportto; " : '' ) .
( ! 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 $sandbox; " : '' ) .
( ! empty( $child ) ? "child-src $child; " : '' ) .
( ! empty( $manifest ) ? "manifest-src $manifest; " : '' ) .
( ! empty( $scriptelem ) ? "script-src-elem $scriptelem; " : '' ) .
( ! empty( $scriptattr ) ? "script-src-attr $scriptattr; " : '' ) .
( ! empty( $styleelem ) ? "style-src-elem $styleelem; " : '' ) .
( ! empty( $styleattr ) ? "style-src-attr $styleattr; " : '' ) .
( ! empty( $worker ) ? "worker-src $worker; " : '' ) .
( ! empty( $default ) ? "default-src $default;" : '' ),
'; '
);
if ( ! empty( $dir ) ) {
$rules[] = "add_header Content-Security-Policy-Report-Only \"$dir\";";
}
}
if ( $this->c->get_boolean( 'browsercache.security.fp' ) ) {
$fp_values = $this->c->get_array( 'browsercache.security.fp.values' );
$feature_v = array();
$permission_v = array();
foreach ( $fp_values as $key => $value ) {
if ( ! empty( $value ) ) {
$value = str_replace( array( '"', "'" ), '', $value );
$feature_v[] = "$key '$value'";
$permission_v[] = "$key=($value)";
}
}
if ( ! empty( $feature_v ) ) {
$rules[] = 'add_header Feature-Policy "' . implode( ';', $feature_v ) . "\";\n";
}
if ( ! empty( $permission_v ) ) {
$rules[] = 'add_header Permissions-Policy "' . implode( ',', $permission_v ) . "\";\n";
}
}
}
return $rules;
}
/**
* Adds cache rules for type to &$rules.
*
* @param string $rules Rules.
* @param array $mime_types MIME types.
* @param string $section Section.
*
* @return void
*/
private function generate_section( &$rules, $mime_types, $section ) {
$expires = $this->c->get_boolean( 'browsercache.' . $section . '.expires' );
$etag = $this->c->get_boolean( 'browsercache.' . $section . '.etag' );
$cache_control = $this->c->get_boolean( 'browsercache.' . $section . '.cache.control' );
$w3tc = $this->c->get_boolean( 'browsercache.' . $section . '.w3tc' );
$last_modified = $this->c->get_boolean( 'browsercache.' . $section . '.last_modified' );
if ( $etag || $expires || $cache_control || $w3tc || ! $last_modified ) {
$mime_types2 = apply_filters(
'w3tc_browsercache_rules_section_extensions',
$mime_types,
$this->c,
$section
);
$extensions = array_keys( $mime_types2 );
// Remove ext from filesmatch if its the same as permalink extension.
$pext = strtolower( pathinfo( get_option( 'permalink_structure' ), PATHINFO_EXTENSION ) );
if ( $pext ) {
$extensions = Util_Rule::remove_extension_from_list( $extensions, $pext );
}
$rules .= 'location ~ \\.(' . implode( '|', $extensions ) . ')$ {' . "\n";
$subrules = Dispatcher::nginx_rules_for_browsercache_section( $this->c, $section );
$rules .= ' ' . implode( "\n ", $subrules ) . "\n";
// Add rules for the Image Service extension, if active.
if ( 'other' === $section && array_key_exists( 'imageservice', $this->c->get_array( 'extensions.active' ) ) ) {
$rules .= "\n" . ' location ~* ^(?<path>.+)\.(jpe?g|png|gif)$ {' . "\n" .
' if ( $http_accept !~* "webp|\*/\*" ) {' . "\n" .
' break;' . "\n" .
' }' . "\n\n" .
' ' . implode( "\n ", Dispatcher::nginx_rules_for_browsercache_section( $this->c, $section, true ) ) . "\n" .
' add_header Vary Accept;' . "\n";
if ( $this->c->get_boolean( 'browsercache.no404wp' ) ) {
$rules .= ' try_files ${path}.webp $uri =404;';
} else {
$rules .= ' try_files ${path}.webp $uri /index.php?$args;';
}
$rules .= "\n" . ' }' . "\n\n";
}
if ( ! $this->c->get_boolean( 'browsercache.no404wp' ) ) {
$wp_uri = network_home_url( '', 'relative' );
$wp_uri = rtrim( $wp_uri, '/' );
$rules .= ' try_files $uri $uri/ ' . $wp_uri . '/index.php?$args;' . "\n";
}
$rules .= '}' . "\n";
}
}
/**
* Returns directives plugin applies to files of specific section without location
*
* $extra_add_headers_set specifies if other add_header directives will be added to location block generated
*
* @param string $section Section.
* @param bool $extra_add_headers_set Extra add headers flag.
*
* @return array
*/
public function section_rules( $section, $extra_add_headers_set = false ) {
$rules = array();
$expires = $this->c->get_boolean( "browsercache.$section.expires" );
$lifetime = $this->c->get_integer( "browsercache.$section.lifetime" );
if ( $expires ) {
$rules[] = 'expires ' . $lifetime . 's;';
}
if ( version_compare( Util_Environment::get_server_version(), '1.3.3', '>=' ) ) {
if ( $this->c->get_boolean( "browsercache.$section.etag" ) ) {
$rules[] = 'etag on;';
} else {
$rules[] = 'etag off;';
}
}
if ( $this->c->get_boolean( "browsercache.$section.last_modified" ) ) {
$rules[] = 'if_modified_since exact;';
} else {
$rules[] = 'if_modified_since off;';
}
$add_header_rules = array();
if ( $this->c->get_boolean( "browsercache.$section.cache.control" ) ) {
$cache_policy = $this->c->get_string( "browsercache.$section.cache.policy" );
switch ( $cache_policy ) {
case 'cache':
$add_header_rules[] = 'add_header Pragma "public";';
$add_header_rules[] = 'add_header Cache-Control "public";';
break;
case 'cache_public_maxage':
$add_header_rules[] = 'add_header Pragma "public";';
if ( $expires ) {
$add_header_rules[] = 'add_header Cache-Control "public";';
} else {
$add_header_rules[] = "add_header Cache-Control \"max-age=$lifetime, public\";";
}
break;
case 'cache_validation':
$add_header_rules[] = 'add_header Pragma "public";';
$add_header_rules[] = 'add_header Cache-Control "public, must-revalidate, proxy-revalidate";';
break;
case 'cache_noproxy':
$add_header_rules[] = 'add_header Pragma "public";';
$add_header_rules[] = 'add_header Cache-Control "private, must-revalidate";';
break;
case 'cache_maxage':
$add_header_rules[] = 'add_header Pragma "public";';
if ( $expires ) {
$add_header_rules[] = 'add_header Cache-Control "public, must-revalidate, proxy-revalidate";';
} else {
$add_header_rules[] = "add_header Cache-Control \"max-age=$lifetime, public, must-revalidate, proxy-revalidate\";";
}
break;
case 'no_cache':
$add_header_rules[] = 'add_header Pragma "no-cache";';
$add_header_rules[] = 'add_header Cache-Control "private, no-cache";';
break;
case 'no_store':
$add_header_rules[] = 'add_header Pragma "no-store";';
$add_header_rules[] = 'add_header Cache-Control "no-store";';
break;
case 'cache_immutable':
$add_header_rules[] = 'add_header Pragma "public";';
$add_header_rules[] = "add_header Cache-Control \"public, max-age=$lifetime, immutable\";";
break;
case 'cache_immutable_nomaxage':
$add_header_rules[] = 'add_header Pragma "public";';
$add_header_rules[] = 'add_header Cache-Control "public, immutable";';
break;
}
}
if ( $this->c->get_boolean( "browsercache.$section.w3tc" ) ) {
$add_header_rules[] = 'add_header X-Powered-By "' . Util_Environment::w3tc_header() . '";';
}
if ( ! empty( $add_header_rules ) || $extra_add_headers_set ) {
$add_header_rules = array_merge( $add_header_rules, $this->security_rules() );
}
return array(
'add_header' => $add_header_rules,
'other' => $rules,
);
}
}