WC_Download_Handler::get_download_range()
Parse the HTTP_RANGE request from iOS devices. Does not support multi-range requests.
Метод класса: WC_Download_Handler{}
Хуков нет.
Возвращает
Массив
. Information about range download request: beginning and length of file chunk, whether the range is valid/supported and whether the request is a range request.
Использование
$result = WC_Download_Handler::get_download_range( $file_size );
- $file_size(int) (обязательный)
- Size of file in bytes.
Код WC_Download_Handler::get_download_range() WC Download Handler::get download range WC 9.4.2
protected static function get_download_range( $file_size ) { $start = 0; $download_range = array( 'start' => $start, 'is_range_valid' => false, 'is_range_request' => false, ); if ( ! $file_size ) { return $download_range; } $end = $file_size - 1; $download_range['length'] = $file_size; if ( isset( $_SERVER['HTTP_RANGE'] ) ) { // @codingStandardsIgnoreLine. $http_range = sanitize_text_field( wp_unslash( $_SERVER['HTTP_RANGE'] ) ); // WPCS: input var ok. $download_range['is_range_request'] = true; $c_start = $start; $c_end = $end; // Extract the range string. list( , $range ) = explode( '=', $http_range, 2 ); // Make sure the client hasn't sent us a multibyte range. if ( strpos( $range, ',' ) !== false ) { return $download_range; } /* * If the range starts with an '-' we start from the beginning. * If not, we forward the file pointer * and make sure to get the end byte if specified. */ if ( '-' === $range[0] ) { // The n-number of the last bytes is requested. $c_start = $file_size - substr( $range, 1 ); } else { $range = explode( '-', $range ); $c_start = ( isset( $range[0] ) && is_numeric( $range[0] ) ) ? (int) $range[0] : 0; $c_end = ( isset( $range[1] ) && is_numeric( $range[1] ) ) ? (int) $range[1] : $file_size; } /* * Check the range and make sure it's treated according to the specs: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html. * End bytes can not be larger than $end. */ $c_end = ( $c_end > $end ) ? $end : $c_end; // Validate the requested range and return an error if it's not correct. if ( $c_start > $c_end || $c_start > $file_size - 1 || $c_end >= $file_size ) { return $download_range; } $start = $c_start; $end = $c_end; $length = $end - $start + 1; $download_range['start'] = $start; $download_range['length'] = $length; $download_range['is_range_valid'] = true; } return $download_range; }