| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| library mime.magic_number; |
| |
| class MagicNumber { |
| final String mimeType; |
| final List<int> numbers; |
| final List<int> mask; |
| |
| const MagicNumber(this.mimeType, this.numbers, {this.mask}); |
| |
| bool matches(List<int> header) { |
| if (header.length < numbers.length) return false; |
| |
| for (int i = 0; i < numbers.length; i++) { |
| if (mask != null) { |
| if ((mask[i] & numbers[i]) != (mask[i] & header[i])) return false; |
| } else { |
| if (numbers[i] != header[i]) return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| } |
| |
| const int DEFAULT_MAGIC_NUMBERS_MAX_LENGTH = 12; |
| |
| const List<MagicNumber> DEFAULT_MAGIC_NUMBERS = const [ |
| const MagicNumber('application/pdf', const [0x25, 0x50, 0x44, 0x46]), |
| const MagicNumber('application/postscript', const [0x25, 0x51]), |
| const MagicNumber('image/gif', const [0x47, 0x49, 0x46, 0x38, 0x37, 0x61]), |
| const MagicNumber('image/gif', const [0x47, 0x49, 0x46, 0x38, 0x39, 0x61]), |
| const MagicNumber('image/jpeg', const [0xFF, 0xD8]), |
| const MagicNumber('image/png', |
| const [0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A]), |
| const MagicNumber('image/tiff', const [0x49, 0x49, 0x2A, 0x00]), |
| const MagicNumber('image/tiff', const [0x4D, 0x4D, 0x00, 0x2A]), |
| const MagicNumber( |
| 'video/mp4', |
| const [0x00, 0x00, 0x00, 0x00, 0x66, 0x74, |
| 0x79, 0x70, 0x33, 0x67, 0x70, 0x35], |
| mask: const [0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0xFF, |
| 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]) |
| ]; |