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<?php |
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/** |
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* Get information about the current request. |
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* |
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* @package automattic/jetpack-status |
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*/ |
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|
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namespace Automattic\Jetpack\Status; |
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|
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use Automattic\Jetpack\Constants; |
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|
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/** |
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* Get information about the current request. |
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*/ |
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class Request { |
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/** |
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* Determine whether the current request is for accessing the frontend. |
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* Also update Vary headers to indicate that the response may vary by Accept header. |
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* |
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* @since 6.0.3 Added $send_vary_headers argument. |
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* |
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* @param bool $send_vary_headers Whether to send Vary headers. |
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* |
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* @return bool True if it's a frontend request, false otherwise. |
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*/ |
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public static function is_frontend( $send_vary_headers = true ) { |
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$is_frontend = true; |
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$is_varying_request = true; |
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|
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if ( |
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is_admin() |
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|| wp_doing_ajax() |
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|| wp_is_jsonp_request() |
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|| is_feed() |
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|| Constants::is_true( 'REST_REQUEST' ) |
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|| Constants::is_true( 'REST_API_REQUEST' ) |
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|| Constants::is_true( 'WP_CLI' ) |
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|| Constants::is_true( 'WPCOM_CLI_SCRIPT' ) // Special case for CLI scripts on WP.com that aren't using WP CLI. |
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) { |
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$is_frontend = false; |
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$is_varying_request = false; |
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} elseif ( |
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wp_is_json_request() |
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|| wp_is_xml_request() |
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) { |
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$is_frontend = false; |
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} |
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|
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/* |
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* Check existing headers for the request. |
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* If there is no existing Vary Accept header, add one. |
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*/ |
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if ( $send_vary_headers && $is_varying_request && ! headers_sent() ) { |
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$headers = headers_list(); |
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$vary_header_parts = self::get_vary_headers( $headers ); |
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|
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header( 'Vary: ' . implode( ', ', $vary_header_parts ) ); |
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} |
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|
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/** |
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* Filter whether the current request is for accessing the frontend. |
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* |
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* @since jetpack-9.0.0 |
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* @since 6.0.3 Added $send_vary_headers argument. |
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* |
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* @param bool $is_frontend Whether the current request is for accessing the frontend. |
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* @param bool $send_vary_headers Whether to send Vary headers. |
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*/ |
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return (bool) apply_filters( 'jetpack_is_frontend', $is_frontend, $send_vary_headers ); |
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} |
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|
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/** |
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* Go through headers and get a list of Vary headers to add, |
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* including Vary on Accept and Content-Type if necessary. |
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* |
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* @since jetpack-12.2 |
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* |
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* @param array $headers The headers to be sent. |
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* |
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* @return array $vary_header_parts Vary Headers to be sent. |
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*/ |
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public static function get_vary_headers( $headers = array() ) { |
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$vary_header_parts = array( 'accept', 'content-type' ); |
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|
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foreach ( $headers as $header ) { |
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// Check for a Vary header. |
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if ( ! str_starts_with( strtolower( $header ), 'vary:' ) ) { |
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continue; |
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} |
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|
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// If the header is a wildcard, we'll return that. |
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if ( str_contains( $header, '*' ) ) { |
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$vary_header_parts = array( '*' ); |
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break; |
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} |
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|
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// Remove the Vary: part of the header. |
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$header = preg_replace( '/^vary\:\s?/i', '', $header ); |
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|
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// Remove spaces from the header. |
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$header = str_replace( ' ', '', $header ); |
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|
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// Break the header into parts. |
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$header_parts = explode( ',', strtolower( $header ) ); |
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|
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// Build an array with the Accept header and what was already there. |
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$vary_header_parts = array_values( array_unique( array_merge( $vary_header_parts, $header_parts ) ) ); |
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} |
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|
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return $vary_header_parts; |
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} |
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} |
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|
