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http-headers.php
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http-headers.php
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<?php
/*
Plugin Name: HTTP Headers
Plugin URI: https://github.com/riverside/http-headers
Description: A plugin for HTTP headers management including security, access-control (CORS), caching, compression, and authentication.
Version: 1.19.1
Author: Dimitar Ivanov
Author URI: https://github.com/riverside
License: GPLv2 or later
Text Domain: http-headers
*/
/*
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/copyleft/gpl.html>.
Copyright (c) 2017-2023 Dimitar Ivanov
*/
if (!defined('ABSPATH')) {
exit;
}
$options = include dirname(__FILE__) . '/views/includes/options.inc.php';
foreach ($options as $option) {
if (get_option($option[0]) === false) {
add_option($option[0], $option[1], null, 'yes');
}
}
function build_csp_value($value, $escape=false) {
if (!is_array($value))
{
return NULL;
}
$csp = array();
foreach ($value as $key => $val)
{
if (is_array($val))
{
$source = NULL;
if (isset($val['source']))
{
$source = $val['source'];
unset($val['source']);
}
if (!empty($val))
{
$val = join(" ", array_keys($val));
if ($source)
{
$val .= " " . $source;
}
$csp[] = sprintf("%s %s", $key, $escape ? esc_html($val) : $val);
} elseif ($source) {
$csp[] = sprintf("%s %s", $key, $escape ? esc_html($source) : $source);
}
} else {
if (in_array($key, array('block-all-mixed-content', 'upgrade-insecure-requests')))
{
$csp[] = $key;
}
if (in_array($key, array('plugin-types', 'report-to')) && !empty($val))
{
$csp[] = sprintf("%s %s", $key, $escape ? esc_html($val) : $val);
}
}
}
if (!$csp)
{
return NULL;
}
return join('; ', $csp);
}
function get_htaccess_filename() {
return get_option('hh_htaccess_path');
}
function get_user_ini_filename() {
return get_option('hh_user_ini_path');
}
function get_htpasswd_filename() {
return get_option('hh_htpasswd_path');
}
function get_htdigest_filename() {
return get_option('hh_htdigest_path');
}
function get_http_headers() {
$statuses = array();
$unset = array();
$headers = array();
$append = array();
if (get_option('hh_x_frame_options') == 1) {
$x_frame_options_value = strtoupper(get_option('hh_x_frame_options_value'));
if ($x_frame_options_value == 'ALLOW-FROM') {
$x_frame_options_value .= ' ' . get_option('hh_x_frame_options_domain');
}
$headers['X-Frame-Options'] = $x_frame_options_value;
}
if (get_option('hh_x_powered_by') == 1) {
if (get_option('hh_x_powered_by_option') == 'set') {
$headers['X-Powered-By'] = get_option('hh_x_powered_by_value');
} else {
$unset[] = 'X-Powered-By';
}
}
if (get_option('hh_x_xxs_protection') == 1) {
$headers['X-XSS-Protection'] = get_option('hh_x_xxs_protection_value');
if ($headers['X-XSS-Protection'] == '1; report=') {
$headers['X-XSS-Protection'] .= get_option('hh_x_xxs_protection_uri');
}
}
if (get_option('hh_x_content_type_options') == 1) {
$headers['X-Content-Type-Options'] = get_option('hh_x_content_type_options_value');
}
if (get_option('hh_x_download_options') == 1) {
$headers['X-Download-Options'] = get_option('hh_x_download_options_value');
}
if (get_option('hh_x_permitted_cross_domain_policies') == 1) {
$headers['X-Permitted-Cross-Domain-Policies'] = get_option('hh_x_permitted_cross_domain_policies_value');
}
if (get_option('hh_x_dns_prefetch_control') == 1) {
$headers['X-DNS-Prefetch-Control'] = get_option('hh_x_dns_prefetch_control_value');
}
if (get_option('hh_connection') == 1) {
$headers['Connection'] = get_option('hh_connection_value');
}
if (get_option('hh_pragma') == 1) {
$headers['Pragma'] = get_option('hh_pragma_value');
}
if (get_option('hh_age') == 1) {
$headers['Age'] = sprintf("%u", get_option('hh_age_value'));
}
if (get_option('hh_cache_control') == 1) {
$hh_cache_control_value = get_option('hh_cache_control_value', array());
$tmp = array();
foreach ($hh_cache_control_value as $k => $v) {
if (in_array($k, array('max-age', 's-maxage', 'stale-while-revalidate', 'stale-if-error'))) {
if (strlen($v) > 0) {
$tmp[] = sprintf("%s=%u", $k, $v);
}
} else {
$tmp[] = $k;
}
}
$hh_cache_control_value = join(', ', $tmp);
$headers['Cache-Control'] = $hh_cache_control_value;
}
if (get_option('hh_strict_transport_security') == 1) {
$hh_strict_transport_security = array();
$hh_strict_transport_security_max_age = get_option('hh_strict_transport_security_max_age');
if ($hh_strict_transport_security_max_age !== false)
{
$hh_strict_transport_security[] = sprintf('max-age=%u', get_option('hh_strict_transport_security_max_age'));
if (get_option('hh_strict_transport_security_sub_domains'))
{
$hh_strict_transport_security[] = 'includeSubDomains';
}
if (get_option('hh_strict_transport_security_preload'))
{
$hh_strict_transport_security[] = 'preload';
}
} else {
$hh_strict_transport_security = array(get_option('hh_strict_transport_security_value'));
}
$headers['Strict-Transport-Security'] = join('; ', $hh_strict_transport_security);
}
if (get_option('hh_x_ua_compatible') == 1) {
$headers['X-UA-Compatible'] = get_option('hh_x_ua_compatible_value');
}
if (get_option('hh_content_security_policy') == 1)
{
$value = get_option('hh_content_security_policy_value');
$csp = build_csp_value($value);
if ($csp)
{
$csp_report_only = get_option('hh_content_security_policy_report_only');
$headers['Content-Security-Policy'.($csp_report_only ? '-Report-Only' : NULL)] = $csp;
}
}
if (get_option('hh_access_control_allow_origin') == 1)
{
$value = get_option('hh_access_control_allow_origin_value');
switch ($value)
{
case 'origin':
$value = get_option('hh_access_control_allow_origin_url', array());
if (is_scalar($value))
{
$value = array($value);
}
break;
}
if (!empty($value))
{
$headers['Access-Control-Allow-Origin'] = $value;
}
}
if (get_option('hh_access_control_allow_credentials') == 1)
{
$headers['Access-Control-Allow-Credentials'] = get_option('hh_access_control_allow_credentials_value');
}
if (get_option('hh_access_control_max_age') == 1)
{
$value = get_option('hh_access_control_max_age_value');
if (!empty($value))
{
$headers['Access-Control-Max-Age'] = intval($value);
}
}
if (get_option('hh_access_control_allow_methods') == 1)
{
$value = get_option('hh_access_control_allow_methods_value');
if (!empty($value))
{
$headers['Access-Control-Allow-Methods'] = join(', ', array_keys($value));
}
}
if (get_option('hh_access_control_allow_headers') == 1)
{
$tmp = array();
$value = get_option('hh_access_control_allow_headers_value');
if (!empty($value))
{
$tmp = array_merge($tmp, array_keys($value));
}
$custom = get_option('hh_access_control_allow_headers_custom');
if (!empty($custom))
{
$tmp = array_merge($tmp, $custom);
}
if ($tmp)
{
$tmp = array_filter($tmp, 'trim');
$tmp = array_unique($tmp);
$headers['Access-Control-Allow-Headers'] = join(', ', $tmp);
}
}
if (get_option('hh_access_control_expose_headers') == 1)
{
$tmp = array();
$value = get_option('hh_access_control_expose_headers_value');
if (!empty($value))
{
$tmp = array_merge($tmp, array_keys($value));
}
$custom = get_option('hh_access_control_expose_headers_custom');
if (!empty($custom))
{
$tmp = array_merge($tmp, $custom);
}
if ($tmp)
{
$tmp = array_filter($tmp, 'trim');
$tmp = array_unique($tmp);
$headers['Access-Control-Expose-Headers'] = join(', ', $tmp);
}
}
if (get_option('hh_p3p') == 1)
{
$value = get_option('hh_p3p_value');
if (!empty($value))
{
$headers['P3P'] = 'CP="' . join(' ', array_keys($value)) . '"';
}
}
if (get_option('hh_referrer_policy') == 1) {
$headers['Referrer-Policy'] = get_option('hh_referrer_policy_value');
}
if (get_option('hh_cross_origin_resource_policy') == 1) {
$headers['Cross-Origin-Resource-Policy'] = get_option('hh_cross_origin_resource_policy_value');
}
if (get_option('hh_cross_origin_embedder_policy') == 1) {
$headers['Cross-Origin-Embedder-Policy'] = get_option('hh_cross_origin_embedder_policy_value');
}
if (get_option('hh_cross_origin_opener_policy') == 1) {
$headers['Cross-Origin-Opener-Policy'] = get_option('hh_cross_origin_opener_policy_value');
}
if (get_option('hh_www_authenticate') == 1) {
switch (get_option('hh_www_authenticate_type')) {
case 'Basic':
if (!(isset($_SERVER['PHP_AUTH_USER'], $_SERVER['PHP_AUTH_PW'])
&& $_SERVER['PHP_AUTH_USER'] == get_option('hh_www_authenticate_user')
&& $_SERVER['PHP_AUTH_PW'] == get_option('hh_www_authenticate_pswd'))) {
$headers['WWW-Authenticate'] = sprintf("Basic realm='%s'", get_option('hh_www_authenticate_realm'));
$statuses['HTTP/1.1'] = '401 Unauthorized';
}
break;
case 'Digest':
if (empty($_SERVER['PHP_AUTH_DIGEST'])) {
$realm = get_option('hh_www_authenticate_realm');
$headers['WWW-Authenticate'] = sprintf("Digest realm='%s',qop='auth',nonce='%s',opaque='%s'",
$realm, uniqid(), md5($realm));
$statuses['HTTP/1.1'] = '401 Unauthorized';
}
break;
}
}
if (get_option('hh_vary') == 1)
{
$value = get_option('hh_vary_value');
if (!empty($value))
{
$append['Vary'] = join(', ', array_keys($value));
}
}
if (get_option('hh_expect_ct') == 1) {
$expect_ct_max_age = get_option('hh_expect_ct_max_age');
$expect_ct_report_uri = get_option('hh_expect_ct_report_uri');
if (!empty($expect_ct_report_uri) && !empty($expect_ct_max_age)) {
$expect_ct = array();
$expect_ct[] = sprintf("max-age=%u", $expect_ct_max_age);
if (get_option('hh_expect_ct_enforce') == 1) {
$expect_ct[] = "enforce";
}
$expect_ct[] = sprintf('report-uri="%s"', $expect_ct_report_uri);
$headers['Expect-CT'] = join(', ', $expect_ct);
}
}
if (get_option('hh_custom_headers') == 1) {
$custom_headers = get_option('hh_custom_headers_value');
if (isset($custom_headers['name'], $custom_headers['value']) && !empty($custom_headers['name'])) {
foreach ($custom_headers['name'] as $key => $name) {
$name = trim($name);
$value = trim($custom_headers['value'][$key]);
if (empty($name) || empty($value)) {
continue;
}
$headers[$name] = $value;
}
}
}
$value = get_http_header('report_to');
if ($value) {
$headers['Report-To'] = $value;
}
$value = get_http_header('nel');
if ($value) {
$headers['NEL'] = $value;
}
$value = get_http_header('feature_policy');
if ($value) {
$headers['Feature-Policy'] = $value;
}
$value = get_http_header('permissions_policy');
if ($value) {
$headers['Permissions-Policy'] = $value;
}
$value = get_http_header('x_robots_tag');
if ($value) {
$headers['X-Robots-Tag'] = $value;
}
return array($headers, $statuses, $unset, $append);
}
function get_http_header($header_name) {
$fn = sprintf('get_%s_header', $header_name);
if (!function_exists($fn)) {
return NULL;
}
return call_user_func($fn);
}
function get_report_to_header() {
if (get_option('hh_report_to') != 1) {
return NULL;
}
$report_to = get_option('hh_report_to_value');
$tmp = array();
foreach ($report_to as $item) {
$endpoints = array();
foreach ($item['endpoints'] as $endpoint) {
$endpoints[] = sprintf('{"url": "%s"%s%s}',
$endpoint['url'],
is_numeric($endpoint['priority']) ? sprintf(', "priority": %u', $endpoint['priority']) : NULL,
is_numeric($endpoint['weight']) ? sprintf(', "weight": %u', $endpoint['weight']) : NULL
);
}
$tmp[] = sprintf('{"max_age": %u%s%s, "endpoints": [%s]}',
$item['max_age'],
$item['group'] ? sprintf(', "group": "%s"', $item['group']) : NULL,
$item['include_subdomains'] ? sprintf(', "include_subdomains": true') : NULL,
join(", ", $endpoints)
);
}
return join(', ', $tmp);
}
function get_x_robots_tag_header() {
if (get_option('hh_x_robots_tag') != 1) {
return NULL;
}
$hh_x_robots_tag_value = get_option('hh_x_robots_tag_value', array());
$tmp = array();
foreach ($hh_x_robots_tag_value as $k => $v) {
if ($k == 'max-snippet') {
if (is_numeric($v) && $v >= -1) {
$tmp[] = "$k:$v";
}
} elseif ($k == 'max-image-preview') {
if (!empty($v)) {
$tmp[] = "$k:$v";
}
} elseif ($k == 'max-video-preview') {
if (is_numeric($v) && $v >= -1) {
$tmp[] = "$k:$v";
}
} elseif ($k == 'unavailable_after') {
if (!empty($v)) {
$tmp[] = "$k:$v";
}
} else {
$tmp[] = $k;
}
}
return join(', ', $tmp);
}
function get_nel_header() {
if (get_option('hh_nel') != 1) {
return NULL;
}
$nel = get_option('hh_nel_value', array());
return sprintf('{"report_to": "%s", "max_age": %u%s%s%s%s%s}',
isset($nel['report_to']) ? $nel['report_to'] : NULL,
isset($nel['max_age']) ? $nel['max_age'] : NULL,
isset($nel['include_subdomains']) ? ', "include_subdomains": true' : NULL,
array_key_exists('success_fraction', $nel) && is_numeric($nel['success_fraction']) ? ', "success_fraction": '. $nel['success_fraction'] : NULL,
array_key_exists('failure_fraction', $nel) && is_numeric($nel['failure_fraction']) ? ', "failure_fraction": '. $nel['failure_fraction'] : NULL,
isset($nel['request_headers']) && !empty($nel['request_headers']) ? sprintf(', "request_headers": ["%s"]', join('", "', array_map('trim', explode(',', $nel['request_headers'])))) : NULL,
isset($nel['response_headers']) && !empty($nel['response_headers']) ? sprintf(', "response_headers": ["%s"]', join('", "', array_map('trim', explode(',', $nel['response_headers'])))) : NULL
);
}
function get_feature_policy_header() {
if (get_option('hh_feature_policy') != 1) {
return NULL;
}
$feature_policy_feature = get_option('hh_feature_policy_feature');
$feature_policy_value = get_option('hh_feature_policy_value');
$feature_policy_origin = get_option('hh_feature_policy_origin');
$tmp = array();
$feature_policy_feature = is_array($feature_policy_feature) ? $feature_policy_feature : array();
foreach (array_keys($feature_policy_feature) as $feature) {
$value = NULL;
switch ($feature_policy_value[$feature]) {
case '*':
case "'none'":
$value = $feature_policy_value[$feature];
break;
case "'self'":
$value = $feature_policy_value[$feature];
if (!empty($feature_policy_origin[$feature])) {
$value .= " " . $feature_policy_origin[$feature];
}
break;
case 'origin(s)':
$value = $feature_policy_origin[$feature];
break;
}
$tmp[] = sprintf("%s %s", $feature, $value);
}
return join('; ', $tmp);
}
function get_permissions_policy_header() {
if (get_option('hh_permissions_policy') != 1) {
return NULL;
}
$permissions_policy_feature = get_option('hh_permissions_policy_feature');
$permissions_policy_value = get_option('hh_permissions_policy_value');
$permissions_policy_origin = get_option('hh_permissions_policy_origin');
$tmp = array();
$permissions_policy_feature = is_array($permissions_policy_feature) ? $permissions_policy_feature : array();
foreach (array_keys($permissions_policy_feature) as $feature) {
$origins = NULL;
if (!empty($permissions_policy_origin[$feature]))
{
$origins = $permissions_policy_origin[$feature];
$origins = str_replace(array('"', "'"), '', $origins);
$origins = explode(' ', $origins);
$origins = array_filter($origins);
$origins = array_unique($origins);
$origins = '"' . join('" "', $origins) . '"';
}
$value = NULL;
switch ($permissions_policy_value[$feature]) {
case '*':
$value = '*';
break;
case "none":
$value = '()';
break;
case "self":
$value = 'self';
if ($origins)
{
$value .= ' ' . $origins;
}
$value = sprintf('(%s)', $value);
break;
case 'origin(s)':
$value = sprintf('(%s)', $origins);
break;
}
$tmp[] = sprintf('%s=%s', $feature, $value);
}
return join(', ', $tmp);
}
function http_digest_parse($txt) {
$txt = stripslashes($txt);
$needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);
$data = array();
$keys = implode('|', array_keys($needed_parts));
$matches = null;
preg_match_all('@(' . $keys . ')=(?:([\'"])([^\2]+?)\2|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER);
foreach ($matches as $m) {
$data[$m[1]] = $m[3] ? $m[3] : $m[4];
unset($needed_parts[$m[1]]);
}
return $needed_parts ? false : $data;
}
function php_auth_digest() {
if (!($data = http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) || get_option('hh_www_authenticate_user') != $data['username']) {
die('Wrong Credentials!');
}
$A1 = md5($data['username'] . ':' . get_option('hh_www_authenticate_realm') . ':' . get_option('hh_www_authenticate_pswd'));
$A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);
$valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);
if ($data['response'] != $valid_response) {
die('Wrong Credentials!');
}
}
function php_content_encoding() {
if (substr_count($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip')) {
ob_start('ob_gzhandler');
} else {
ob_start();
}
}
function php_cookie_security_directives() {
$lines = array();
if (get_option('hh_cookie_security') == 1) {
$value = get_option('hh_cookie_security_value', array());
if (isset($value['HttpOnly'])) {
$lines[] = 'session.cookie_httponly = on';
}
if (isset($value['Secure'])) {
$lines[] = 'session.cookie_secure = on';
}
if (isset($value['SameSite']) && in_array($value['SameSite'], array('None', 'Lax', 'Strict'))) {
$lines[] = sprintf('session.cookie_samesite = "%s"', $value['SameSite']);
}
}
return $lines;
}
function http_headers() {
if (!is_php_mode()) {
return;
}
// PHP method below
list($headers, $statuses, $unset, $append) = get_http_headers();
$isCors = false;
foreach ($headers as $key => $value) {
if ($key == 'Access-Control-Allow-Origin') {
if (isset($_SERVER['HTTP_ORIGIN'])) {
if (in_array($value, array('*', 'null'))) {
$isCors = true;
header(sprintf("%s: *", $key));
}
if (is_array($value) && in_array($_SERVER['HTTP_ORIGIN'], $value)) {
$isCors = true;
header(sprintf("%s: %s", $key, $_SERVER['HTTP_ORIGIN']));
header("Vary: Origin", false);
}
}
continue;
}
if (in_array($key, array('Access-Control-Allow-Headers', 'Access-Control-Allow-Methods', 'Access-Control-Allow-Credentials', 'Access-Control-Max-Age', 'Access-Control-Expose-Headers'))) {
if ($isCors) {
header(sprintf("%s: %s", $key, $value));
}
continue;
}
header(sprintf("%s: %s", $key, $value));
}
foreach ($append as $key => $value) {
header(sprintf("%s: %s", $key, $value), false);
}
foreach ($unset as $header) {
if (function_exists('header_remove')) {
header_remove($header);
} else {
header("$header:");
}
}
foreach ($statuses as $key => $value) {
header(sprintf("%s %s", $key, $value));
exit;
}
if (get_option('hh_www_authenticate') == 1) {
php_auth_digest();
}
if (get_option('hh_content_encoding') == 1) {
php_content_encoding();
}
}
function http_headers_admin_add_page() {
add_options_page('HTTP Headers', 'HTTP Headers', 'manage_options', 'http-headers', 'http_headers_admin_page');
}
function http_headers_admin() {
register_setting('http-headers-mtd', 'hh_method');
register_setting('http-headers-mtd', 'hh_htaccess_path');
register_setting('http-headers-mtd', 'hh_user_ini_path');
register_setting('http-headers-mtd', 'hh_htpasswd_path');
register_setting('http-headers-mtd', 'hh_htdigest_path');
register_setting('http-headers-xfo', 'hh_x_frame_options');
register_setting('http-headers-xfo', 'hh_x_frame_options_value');
register_setting('http-headers-xfo', 'hh_x_frame_options_domain');
register_setting('http-headers-xss', 'hh_x_xxs_protection');
register_setting('http-headers-xss', 'hh_x_xxs_protection_value');
register_setting('http-headers-xss', 'hh_x_xxs_protection_uri');
register_setting('http-headers-cto', 'hh_x_content_type_options');
register_setting('http-headers-cto', 'hh_x_content_type_options_value');
register_setting('http-headers-sts', 'hh_strict_transport_security');
register_setting('http-headers-sts', 'hh_strict_transport_security_value'); //obsolete
register_setting('http-headers-sts', 'hh_strict_transport_security_max_age');
register_setting('http-headers-sts', 'hh_strict_transport_security_sub_domains');
register_setting('http-headers-sts', 'hh_strict_transport_security_preload');
register_setting('http-headers-uac', 'hh_x_ua_compatible');
register_setting('http-headers-uac', 'hh_x_ua_compatible_value');
register_setting('http-headers-p3p', 'hh_p3p');
register_setting('http-headers-p3p', 'hh_p3p_value');
register_setting('http-headers-rp', 'hh_referrer_policy');
register_setting('http-headers-rp', 'hh_referrer_policy_value');
register_setting('http-headers-csp', 'hh_content_security_policy');
register_setting('http-headers-csp', 'hh_content_security_policy_value');
register_setting('http-headers-csp', 'hh_content_security_policy_report_only');
register_setting('http-headers-acao', 'hh_access_control_allow_origin');
register_setting('http-headers-acao', 'hh_access_control_allow_origin_value');
register_setting('http-headers-acao', 'hh_access_control_allow_origin_url');
register_setting('http-headers-acac', 'hh_access_control_allow_credentials');
register_setting('http-headers-acac', 'hh_access_control_allow_credentials_value');
register_setting('http-headers-acam', 'hh_access_control_allow_methods');
register_setting('http-headers-acam', 'hh_access_control_allow_methods_value');
register_setting('http-headers-acah', 'hh_access_control_allow_headers');
register_setting('http-headers-acah', 'hh_access_control_allow_headers_value');
register_setting('http-headers-acah', 'hh_access_control_allow_headers_custom');
register_setting('http-headers-aceh', 'hh_access_control_expose_headers');
register_setting('http-headers-aceh', 'hh_access_control_expose_headers_value');
register_setting('http-headers-aceh', 'hh_access_control_expose_headers_custom');
register_setting('http-headers-acma', 'hh_access_control_max_age');
register_setting('http-headers-acma', 'hh_access_control_max_age_value');
register_setting('http-headers-ce', 'hh_content_encoding');
register_setting('http-headers-ce', 'hh_content_encoding_module');
register_setting('http-headers-ce', 'hh_content_encoding_value');
register_setting('http-headers-ce', 'hh_content_encoding_ext');
register_setting('http-headers-vary', 'hh_vary');
register_setting('http-headers-vary', 'hh_vary_value');
register_setting('http-headers-xpb', 'hh_x_powered_by');
register_setting('http-headers-xpb', 'hh_x_powered_by_option');
register_setting('http-headers-xpb', 'hh_x_powered_by_value');
register_setting('http-headers-wwa', 'hh_www_authenticate');
register_setting('http-headers-wwa', 'hh_www_authenticate_type');
register_setting('http-headers-wwa', 'hh_www_authenticate_realm');
register_setting('http-headers-wwa', 'hh_www_authenticate_user');
register_setting('http-headers-wwa', 'hh_www_authenticate_pswd');
register_setting('http-headers-cc', 'hh_cache_control');
register_setting('http-headers-cc', 'hh_cache_control_value');
register_setting('http-headers-age', 'hh_age');
register_setting('http-headers-age', 'hh_age_value');
register_setting('http-headers-pra', 'hh_pragma');
register_setting('http-headers-pra', 'hh_pragma_value');
register_setting('http-headers-exp', 'hh_expires');
register_setting('http-headers-exp', 'hh_expires_value');
register_setting('http-headers-exp', 'hh_expires_type');
register_setting('http-headers-con', 'hh_connection');
register_setting('http-headers-con', 'hh_connection_value');
register_setting('http-headers-cose', 'hh_cookie_security');
register_setting('http-headers-cose', 'hh_cookie_security_value');
register_setting('http-headers-ect', 'hh_expect_ct');
register_setting('http-headers-ect', 'hh_expect_ct_max_age');
register_setting('http-headers-ect', 'hh_expect_ct_report_uri');
register_setting('http-headers-ect', 'hh_expect_ct_enforce');
register_setting('http-headers-tao', 'hh_timing_allow_origin');
register_setting('http-headers-tao', 'hh_timing_allow_origin_value');
register_setting('http-headers-tao', 'hh_timing_allow_origin_url');
register_setting('http-headers-che', 'hh_custom_headers');
register_setting('http-headers-che', 'hh_custom_headers_value');
register_setting('http-headers-xdo', 'hh_x_download_options');
register_setting('http-headers-xdo', 'hh_x_download_options_value');
register_setting('http-headers-xpcd', 'hh_x_permitted_cross_domain_policies');
register_setting('http-headers-xpcd', 'hh_x_permitted_cross_domain_policies_value');
register_setting('http-headers-xdpc', 'hh_x_dns_prefetch_control');
register_setting('http-headers-xdpc', 'hh_x_dns_prefetch_control_value');
register_setting('http-headers-rt', 'hh_report_to');
register_setting('http-headers-rt', 'hh_report_to_value');
register_setting('http-headers-fp', 'hh_feature_policy');
register_setting('http-headers-fp', 'hh_feature_policy_value');
register_setting('http-headers-fp', 'hh_feature_policy_feature');
register_setting('http-headers-fp', 'hh_feature_policy_origin');
register_setting('http-headers-pp', 'hh_permissions_policy');
register_setting('http-headers-pp', 'hh_permissions_policy_value');
register_setting('http-headers-pp', 'hh_permissions_policy_feature');
register_setting('http-headers-pp', 'hh_permissions_policy_origin');
register_setting('http-headers-csd', 'hh_clear_site_data');
register_setting('http-headers-csd', 'hh_clear_site_data_value');
register_setting('http-headers-cty', 'hh_content_type');
register_setting('http-headers-cty', 'hh_content_type_value');
register_setting('http-headers-corp', 'hh_cross_origin_resource_policy');
register_setting('http-headers-corp', 'hh_cross_origin_resource_policy_value');
register_setting('http-headers-nel', 'hh_nel');
register_setting('http-headers-nel', 'hh_nel_value');
register_setting('http-headers-coep', 'hh_cross_origin_embedder_policy');
register_setting('http-headers-coep', 'hh_cross_origin_embedder_policy_value');
register_setting('http-headers-coop', 'hh_cross_origin_opener_policy');
register_setting('http-headers-coop', 'hh_cross_origin_opener_policy_value');
register_setting('http-headers-rob', 'hh_x_robots_tag');
register_setting('http-headers-rob', 'hh_x_robots_tag_value');
}
function http_headers_option($option) {
include_once ABSPATH . 'wp-admin/includes/admin.php';
require_once ABSPATH . WPINC . '/pluggable.php';
if (isset($_POST['hh_method']))
{
check_admin_referer('http-headers-mtd-options');
if (!is_super_admin()) {
wp_redirect(sprintf("%soptions-general.php?page=http-headers&tab=advanced&status=ERR&code=102", get_admin_url()));
exit;
}
# When method is changed
http_headers_activate();
} elseif (is_apache_mode()) {
# When particular header is changed
switch (true) {
case array_key_exists('hh_www_authenticate', $_POST):
check_admin_referer('http-headers-wwa-options');
update_auth_credentials();
update_auth_directives();
break;
case array_key_exists('hh_content_encoding', $_POST):
check_admin_referer('http-headers-ce-options');
update_content_encoding_directives();
break;
case array_key_exists('hh_content_type', $_POST):
check_admin_referer('http-headers-cty-options');
update_content_type_directives();
break;
case array_key_exists('hh_expires', $_POST):
check_admin_referer('http-headers-exp-options');
update_expires_directives();
break;
case array_key_exists('hh_cookie_security', $_POST):
check_admin_referer('http-headers-cose-options');
update_cookie_security_directives();
break;
case array_key_exists('hh_timing_allow_origin', $_POST):
check_admin_referer('http-headers-tao-options');
update_timing_directives();
break;
case array_key_exists('option_page', $_POST) && strpos($_POST['option_page'], 'http-headers-') === 0:
check_admin_referer($_POST['option_page'].'-options');
update_headers_directives();
break;
}
}
}
function nginx_headers_directives() {
$lines = array();
list($headers, , $unset, $append) = get_http_headers();
foreach ($unset as $header) {
$lines[] = sprintf(' more_clear_headers "%s";', $header);
}
$cors = $cors_header = $cors_inner = $cors_footer = array();
$all = array();
foreach ($headers as $key => $value) {
if (in_array($key, array('WWW-Authenticate'))) {
continue;
}
if (in_array($key, array('X-Content-Type-Options'))) {
$all[] = sprintf('add_header %s %s always;', $key, sprintf('%1$s%2$s%1$s', strpos($value, '"') === false ? '"' : "'", $value));
continue;
}
if ($key == 'Access-Control-Allow-Origin' && is_array($value)) {
$cors_header[] = sprintf('if ($http_origin ~* ^(%s)$) {', str_replace('.', '\.', join('|', $value)));
$cors_footer[] = '}';
$cors_inner[] = ' add_header Access-Control-Allow-Origin "$http_origin";';
if (!in_array('*', $value))
{
$cors_inner[] = ' add_header Vary "Origin";';
}
continue;
}
if (in_array($key, array('Access-Control-Allow-Headers', 'Access-Control-Allow-Methods', 'Access-Control-Allow-Credentials', 'Access-Control-Max-Age', 'Access-Control-Expose-Headers'))) {
$cors_inner[] = sprintf(' add_header %s %s;', $key, sprintf('%1$s%2$s%1$s', strpos($value, '"') === false ? '"' : "'", $value));
continue;
}
$lines[] = sprintf(' add_header %s %s;', $key, sprintf('%1$s%2$s%1$s', strpos($value, '"') === false ? '"' : "'", $value));
}
foreach ($append as $key => $value) {
$lines[] = sprintf(' add_header %s %s;', $key, sprintf('%1$s%2$s%1$s', strpos($value, '"') === false ? '"' : "'", $value));
}
if (!empty($cors_inner))
{
$cors = array_merge(
$cors_header,
$cors_inner,
$cors_footer
);
}
if (!empty($lines)) {
$lines = array_merge(
$all,
$cors,
array('location ~* \.(php|html)$ {'),
$lines,
array('}')
);
}
return $lines;
}
function nginx_content_encoding_directives() {
$lines = array();
if (get_option('hh_content_encoding') == 1) {
$lines[] = 'gzip on;';
$content_encoding_value = get_option('hh_content_encoding_value');
if (!$content_encoding_value) {
$content_encoding_value = array();
}
$content_encoding_ext = get_option('hh_content_encoding_ext');
if (!$content_encoding_ext) {
$content_encoding_ext = array();
}
if (!empty($content_encoding_ext)) {
//$lines[] = sprintf('<FilesMatch "\.(%s)$">', join('|', array_keys($content_encoding_ext)));
}
if (!empty($content_encoding_value)) {
$lines[] = sprintf('gzip_types %s;', join(' ', array_keys($content_encoding_value)));
}
}
return $lines;
}
function nginx_content_type_directives() {
$lines = array();
if (get_option('hh_content_type') == 1) {
$values = get_option('hh_content_type_value', array());
foreach ($values as $ext => $media_type) {
$lines[] = sprintf("%s %s;", $media_type, $ext);
}
}
return $lines;
}
function nginx_expires_directives() {
$lines = array();
if (get_option('hh_expires') == 1) {
$types = get_option('hh_expires_type', array());
$values = get_option('hh_expires_value', array());
$lines[] = 'map $sent_http_content_type $expires {';
foreach (array_keys($types) as $type) {
list($base, $period, $suffix) = explode('_', $values[$type]);
if (in_array($base, array('access', 'modification'))) {
$lines[] = $type != 'default'
? sprintf(' %s %u%s;', $type, $period, $suffix[0])
: sprintf(' default %u%s;', $period, $suffix[0]);
} elseif ($base == 'invalid') {
$lines[] = $type != 'default'
? sprintf(' %s 0;', $type)
: sprintf(' default 0;');
}
}
$lines[] = '}';
$lines[] = 'expires $expires;';
}
return $lines;
}
function nginx_timing_directives() {
$lines = array();
if (get_option('hh_timing_allow_origin') == 1) {
$value = get_option('hh_timing_allow_origin_value');
switch ($value)
{
case 'origin':
$value = get_option('hh_timing_allow_origin_url');
break;
}
if (!empty($value))
{
$lines[] = 'location ~* \.(js|css|jpe?g|png|gif|eot|otf|svg|ttf|woff2?)$ {';
$lines[] = sprintf(' add_header Timing-Allow-Origin "%s";', $value);
$lines[] = '}';
}
}
return $lines;
}
function nginx_auth_directives() {
$lines = array();
if (get_option('hh_www_authenticate') == 1) {
$type = get_option('hh_www_authenticate_type');
$file = $type == 'Basic' ? get_htpasswd_filename() : get_htdigest_filename();
$lines[] = sprintf('location ~ ^%s$ {', str_replace('.', '\.', basename($file)));
$lines[] = ' deny all;';
$lines[] = '}';
$lines[] = sprintf('location %s {', get_home_path());
if ($type == 'Basic') {
$lines[] = sprintf(' auth_basic "%s";', get_option('hh_www_authenticate_realm'));
$lines[] = sprintf(' auth_basic_user_file %s;', $file);
} else {
$lines[] = sprintf(' auth_digest "%s";', get_option('hh_www_authenticate_realm'));
$lines[] = sprintf(' auth_digest_user_file %s;', $file);
}
$lines[] = '}';
}
return $lines;
}
function nginx_auth_credentials() {
return apache_auth_credentials();
}
function nginx_cookie_security_directives() {
$lines = array();