915 lines
18 KiB
JavaScript
915 lines
18 KiB
JavaScript
'use strict';
|
|
const toBytes = s => [...s].map(c => c.charCodeAt(0));
|
|
const xpiZipFilename = toBytes('META-INF/mozilla.rsa');
|
|
const oxmlContentTypes = toBytes('[Content_Types].xml');
|
|
const oxmlRels = toBytes('_rels/.rels');
|
|
|
|
function readUInt64LE(buf, offset = 0) {
|
|
let n = buf[offset];
|
|
let mul = 1;
|
|
let i = 0;
|
|
while (++i < 8) {
|
|
mul *= 0x100;
|
|
n += buf[offset + i] * mul;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
module.exports = input => {
|
|
if (!(input instanceof Uint8Array || Buffer.isBuffer(input))) {
|
|
throw new TypeError(`Expected the \`input\` argument to be of type \`Uint8Array\` or \`Buffer\`, got \`${typeof input}\``);
|
|
}
|
|
|
|
const buf = input instanceof Uint8Array ? input : new Uint8Array(input);
|
|
|
|
if (!(buf && buf.length > 1)) {
|
|
return null;
|
|
}
|
|
|
|
const check = (header, options) => {
|
|
options = Object.assign({
|
|
offset: 0
|
|
}, options);
|
|
|
|
for (let i = 0; i < header.length; i++) {
|
|
// If a bitmask is set
|
|
if (options.mask) {
|
|
// If header doesn't equal `buf` with bits masked off
|
|
if (header[i] !== (options.mask[i] & buf[i + options.offset])) {
|
|
return false;
|
|
}
|
|
} else if (header[i] !== buf[i + options.offset]) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
};
|
|
|
|
const checkString = (header, options) => check(toBytes(header), options);
|
|
|
|
if (check([0xFF, 0xD8, 0xFF])) {
|
|
return {
|
|
ext: 'jpg',
|
|
mime: 'image/jpeg'
|
|
};
|
|
}
|
|
|
|
if (check([0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A])) {
|
|
return {
|
|
ext: 'png',
|
|
mime: 'image/png'
|
|
};
|
|
}
|
|
|
|
if (check([0x47, 0x49, 0x46])) {
|
|
return {
|
|
ext: 'gif',
|
|
mime: 'image/gif'
|
|
};
|
|
}
|
|
|
|
if (check([0x57, 0x45, 0x42, 0x50], {offset: 8})) {
|
|
return {
|
|
ext: 'webp',
|
|
mime: 'image/webp'
|
|
};
|
|
}
|
|
|
|
if (check([0x46, 0x4C, 0x49, 0x46])) {
|
|
return {
|
|
ext: 'flif',
|
|
mime: 'image/flif'
|
|
};
|
|
}
|
|
|
|
// Needs to be before `tif` check
|
|
if (
|
|
(check([0x49, 0x49, 0x2A, 0x0]) || check([0x4D, 0x4D, 0x0, 0x2A])) &&
|
|
check([0x43, 0x52], {offset: 8})
|
|
) {
|
|
return {
|
|
ext: 'cr2',
|
|
mime: 'image/x-canon-cr2'
|
|
};
|
|
}
|
|
|
|
if (
|
|
check([0x49, 0x49, 0x2A, 0x0]) ||
|
|
check([0x4D, 0x4D, 0x0, 0x2A])
|
|
) {
|
|
return {
|
|
ext: 'tif',
|
|
mime: 'image/tiff'
|
|
};
|
|
}
|
|
|
|
if (check([0x42, 0x4D])) {
|
|
return {
|
|
ext: 'bmp',
|
|
mime: 'image/bmp'
|
|
};
|
|
}
|
|
|
|
if (check([0x49, 0x49, 0xBC])) {
|
|
return {
|
|
ext: 'jxr',
|
|
mime: 'image/vnd.ms-photo'
|
|
};
|
|
}
|
|
|
|
if (check([0x38, 0x42, 0x50, 0x53])) {
|
|
return {
|
|
ext: 'psd',
|
|
mime: 'image/vnd.adobe.photoshop'
|
|
};
|
|
}
|
|
|
|
// Zip-based file formats
|
|
// Need to be before the `zip` check
|
|
if (check([0x50, 0x4B, 0x3, 0x4])) {
|
|
if (
|
|
check([0x6D, 0x69, 0x6D, 0x65, 0x74, 0x79, 0x70, 0x65, 0x61, 0x70, 0x70, 0x6C, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6F, 0x6E, 0x2F, 0x65, 0x70, 0x75, 0x62, 0x2B, 0x7A, 0x69, 0x70], {offset: 30})
|
|
) {
|
|
return {
|
|
ext: 'epub',
|
|
mime: 'application/epub+zip'
|
|
};
|
|
}
|
|
|
|
// Assumes signed `.xpi` from addons.mozilla.org
|
|
if (check(xpiZipFilename, {offset: 30})) {
|
|
return {
|
|
ext: 'xpi',
|
|
mime: 'application/x-xpinstall'
|
|
};
|
|
}
|
|
|
|
if (checkString('mimetypeapplication/vnd.oasis.opendocument.text', {offset: 30})) {
|
|
return {
|
|
ext: 'odt',
|
|
mime: 'application/vnd.oasis.opendocument.text'
|
|
};
|
|
}
|
|
|
|
if (checkString('mimetypeapplication/vnd.oasis.opendocument.spreadsheet', {offset: 30})) {
|
|
return {
|
|
ext: 'ods',
|
|
mime: 'application/vnd.oasis.opendocument.spreadsheet'
|
|
};
|
|
}
|
|
|
|
if (checkString('mimetypeapplication/vnd.oasis.opendocument.presentation', {offset: 30})) {
|
|
return {
|
|
ext: 'odp',
|
|
mime: 'application/vnd.oasis.opendocument.presentation'
|
|
};
|
|
}
|
|
|
|
// The docx, xlsx and pptx file types extend the Office Open XML file format:
|
|
// https://en.wikipedia.org/wiki/Office_Open_XML_file_formats
|
|
// We look for:
|
|
// - one entry named '[Content_Types].xml' or '_rels/.rels',
|
|
// - one entry indicating specific type of file.
|
|
// MS Office, OpenOffice and LibreOffice may put the parts in different order, so the check should not rely on it.
|
|
const findNextZipHeaderIndex = (arr, startAt = 0) => arr.findIndex((el, i, arr) => i >= startAt && arr[i] === 0x50 && arr[i + 1] === 0x4B && arr[i + 2] === 0x3 && arr[i + 3] === 0x4);
|
|
|
|
let zipHeaderIndex = 0; // The first zip header was already found at index 0
|
|
let oxmlFound = false;
|
|
let type = null;
|
|
|
|
do {
|
|
const offset = zipHeaderIndex + 30;
|
|
|
|
if (!oxmlFound) {
|
|
oxmlFound = (check(oxmlContentTypes, {offset}) || check(oxmlRels, {offset}));
|
|
}
|
|
|
|
if (!type) {
|
|
if (checkString('word/', {offset})) {
|
|
type = {
|
|
ext: 'docx',
|
|
mime: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
|
|
};
|
|
} else if (checkString('ppt/', {offset})) {
|
|
type = {
|
|
ext: 'pptx',
|
|
mime: 'application/vnd.openxmlformats-officedocument.presentationml.presentation'
|
|
};
|
|
} else if (checkString('xl/', {offset})) {
|
|
type = {
|
|
ext: 'xlsx',
|
|
mime: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
|
|
};
|
|
}
|
|
}
|
|
|
|
if (oxmlFound && type) {
|
|
return type;
|
|
}
|
|
|
|
zipHeaderIndex = findNextZipHeaderIndex(buf, offset);
|
|
} while (zipHeaderIndex >= 0);
|
|
|
|
// No more zip parts available in the buffer, but maybe we are almost certain about the type?
|
|
if (type) {
|
|
return type;
|
|
}
|
|
}
|
|
|
|
if (
|
|
check([0x50, 0x4B]) &&
|
|
(buf[2] === 0x3 || buf[2] === 0x5 || buf[2] === 0x7) &&
|
|
(buf[3] === 0x4 || buf[3] === 0x6 || buf[3] === 0x8)
|
|
) {
|
|
return {
|
|
ext: 'zip',
|
|
mime: 'application/zip'
|
|
};
|
|
}
|
|
|
|
if (check([0x75, 0x73, 0x74, 0x61, 0x72], {offset: 257})) {
|
|
return {
|
|
ext: 'tar',
|
|
mime: 'application/x-tar'
|
|
};
|
|
}
|
|
|
|
if (
|
|
check([0x52, 0x61, 0x72, 0x21, 0x1A, 0x7]) &&
|
|
(buf[6] === 0x0 || buf[6] === 0x1)
|
|
) {
|
|
return {
|
|
ext: 'rar',
|
|
mime: 'application/x-rar-compressed'
|
|
};
|
|
}
|
|
|
|
if (check([0x1F, 0x8B, 0x8])) {
|
|
return {
|
|
ext: 'gz',
|
|
mime: 'application/gzip'
|
|
};
|
|
}
|
|
|
|
if (check([0x42, 0x5A, 0x68])) {
|
|
return {
|
|
ext: 'bz2',
|
|
mime: 'application/x-bzip2'
|
|
};
|
|
}
|
|
|
|
if (check([0x37, 0x7A, 0xBC, 0xAF, 0x27, 0x1C])) {
|
|
return {
|
|
ext: '7z',
|
|
mime: 'application/x-7z-compressed'
|
|
};
|
|
}
|
|
|
|
if (check([0x78, 0x01])) {
|
|
return {
|
|
ext: 'dmg',
|
|
mime: 'application/x-apple-diskimage'
|
|
};
|
|
}
|
|
|
|
if (check([0x33, 0x67, 0x70, 0x35]) || // 3gp5
|
|
(
|
|
check([0x0, 0x0, 0x0]) && check([0x66, 0x74, 0x79, 0x70], {offset: 4}) &&
|
|
(
|
|
check([0x6D, 0x70, 0x34, 0x31], {offset: 8}) || // MP41
|
|
check([0x6D, 0x70, 0x34, 0x32], {offset: 8}) || // MP42
|
|
check([0x69, 0x73, 0x6F, 0x6D], {offset: 8}) || // ISOM
|
|
check([0x69, 0x73, 0x6F, 0x32], {offset: 8}) || // ISO2
|
|
check([0x6D, 0x6D, 0x70, 0x34], {offset: 8}) || // MMP4
|
|
check([0x4D, 0x34, 0x56], {offset: 8}) || // M4V
|
|
check([0x64, 0x61, 0x73, 0x68], {offset: 8}) // DASH
|
|
)
|
|
)) {
|
|
return {
|
|
ext: 'mp4',
|
|
mime: 'video/mp4'
|
|
};
|
|
}
|
|
|
|
if (check([0x4D, 0x54, 0x68, 0x64])) {
|
|
return {
|
|
ext: 'mid',
|
|
mime: 'audio/midi'
|
|
};
|
|
}
|
|
|
|
// https://github.com/threatstack/libmagic/blob/master/magic/Magdir/matroska
|
|
if (check([0x1A, 0x45, 0xDF, 0xA3])) {
|
|
const sliced = buf.subarray(4, 4 + 4096);
|
|
const idPos = sliced.findIndex((el, i, arr) => arr[i] === 0x42 && arr[i + 1] === 0x82);
|
|
|
|
if (idPos !== -1) {
|
|
const docTypePos = idPos + 3;
|
|
const findDocType = type => [...type].every((c, i) => sliced[docTypePos + i] === c.charCodeAt(0));
|
|
|
|
if (findDocType('matroska')) {
|
|
return {
|
|
ext: 'mkv',
|
|
mime: 'video/x-matroska'
|
|
};
|
|
}
|
|
|
|
if (findDocType('webm')) {
|
|
return {
|
|
ext: 'webm',
|
|
mime: 'video/webm'
|
|
};
|
|
}
|
|
}
|
|
}
|
|
|
|
if (check([0x0, 0x0, 0x0, 0x14, 0x66, 0x74, 0x79, 0x70, 0x71, 0x74, 0x20, 0x20]) ||
|
|
check([0x66, 0x72, 0x65, 0x65], {offset: 4}) || // Type: `free`
|
|
check([0x66, 0x74, 0x79, 0x70, 0x71, 0x74, 0x20, 0x20], {offset: 4}) ||
|
|
check([0x6D, 0x64, 0x61, 0x74], {offset: 4}) || // MJPEG
|
|
check([0x6D, 0x6F, 0x6F, 0x76], {offset: 4}) || // Type: `moov`
|
|
check([0x77, 0x69, 0x64, 0x65], {offset: 4})) {
|
|
return {
|
|
ext: 'mov',
|
|
mime: 'video/quicktime'
|
|
};
|
|
}
|
|
|
|
// RIFF file format which might be AVI, WAV, QCP, etc
|
|
if (check([0x52, 0x49, 0x46, 0x46])) {
|
|
if (check([0x41, 0x56, 0x49], {offset: 8})) {
|
|
return {
|
|
ext: 'avi',
|
|
mime: 'video/vnd.avi'
|
|
};
|
|
}
|
|
if (check([0x57, 0x41, 0x56, 0x45], {offset: 8})) {
|
|
return {
|
|
ext: 'wav',
|
|
mime: 'audio/vnd.wave'
|
|
};
|
|
}
|
|
// QLCM, QCP file
|
|
if (check([0x51, 0x4C, 0x43, 0x4D], {offset: 8})) {
|
|
return {
|
|
ext: 'qcp',
|
|
mime: 'audio/qcelp'
|
|
};
|
|
}
|
|
}
|
|
|
|
// ASF_Header_Object first 80 bytes
|
|
if (check([0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xA6, 0xD9])) {
|
|
// Search for header should be in first 1KB of file.
|
|
|
|
let offset = 30;
|
|
do {
|
|
const objectSize = readUInt64LE(buf, offset + 16);
|
|
if (check([0x91, 0x07, 0xDC, 0xB7, 0xB7, 0xA9, 0xCF, 0x11, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65], {offset})) {
|
|
// Sync on Stream-Properties-Object (B7DC0791-A9B7-11CF-8EE6-00C00C205365)
|
|
if (check([0x40, 0x9E, 0x69, 0xF8, 0x4D, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B], {offset: offset + 24})) {
|
|
// Found audio:
|
|
return {
|
|
ext: 'wma',
|
|
mime: 'audio/x-ms-wma'
|
|
};
|
|
}
|
|
|
|
if (check([0xC0, 0xEF, 0x19, 0xBC, 0x4D, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B], {offset: offset + 24})) {
|
|
// Found video:
|
|
return {
|
|
ext: 'wmv',
|
|
mime: 'video/x-ms-asf'
|
|
};
|
|
}
|
|
|
|
break;
|
|
}
|
|
offset += objectSize;
|
|
} while (offset + 24 <= buf.length);
|
|
|
|
// Default to ASF generic extension
|
|
return {
|
|
ext: 'asf',
|
|
mime: 'application/vnd.ms-asf'
|
|
};
|
|
}
|
|
|
|
if (
|
|
check([0x0, 0x0, 0x1, 0xBA]) ||
|
|
check([0x0, 0x0, 0x1, 0xB3])
|
|
) {
|
|
return {
|
|
ext: 'mpg',
|
|
mime: 'video/mpeg'
|
|
};
|
|
}
|
|
|
|
if (check([0x66, 0x74, 0x79, 0x70, 0x33, 0x67], {offset: 4})) {
|
|
return {
|
|
ext: '3gp',
|
|
mime: 'video/3gpp'
|
|
};
|
|
}
|
|
|
|
// Check for MPEG header at different starting offsets
|
|
for (let start = 0; start < 2 && start < (buf.length - 16); start++) {
|
|
if (
|
|
check([0x49, 0x44, 0x33], {offset: start}) || // ID3 header
|
|
check([0xFF, 0xE2], {offset: start, mask: [0xFF, 0xE2]}) // MPEG 1 or 2 Layer 3 header
|
|
) {
|
|
return {
|
|
ext: 'mp3',
|
|
mime: 'audio/mpeg'
|
|
};
|
|
}
|
|
|
|
if (
|
|
check([0xFF, 0xE4], {offset: start, mask: [0xFF, 0xE4]}) // MPEG 1 or 2 Layer 2 header
|
|
) {
|
|
return {
|
|
ext: 'mp2',
|
|
mime: 'audio/mpeg'
|
|
};
|
|
}
|
|
|
|
if (
|
|
check([0xFF, 0xF8], {offset: start, mask: [0xFF, 0xFC]}) // MPEG 2 layer 0 using ADTS
|
|
) {
|
|
return {
|
|
ext: 'mp2',
|
|
mime: 'audio/mpeg'
|
|
};
|
|
}
|
|
|
|
if (
|
|
check([0xFF, 0xF0], {offset: start, mask: [0xFF, 0xFC]}) // MPEG 4 layer 0 using ADTS
|
|
) {
|
|
return {
|
|
ext: 'mp4',
|
|
mime: 'audio/mpeg'
|
|
};
|
|
}
|
|
}
|
|
|
|
if (
|
|
check([0x66, 0x74, 0x79, 0x70, 0x4D, 0x34, 0x41], {offset: 4}) ||
|
|
check([0x4D, 0x34, 0x41, 0x20])
|
|
) {
|
|
return { // MPEG-4 layer 3 (audio)
|
|
ext: 'm4a',
|
|
mime: 'audio/mp4' // RFC 4337
|
|
};
|
|
}
|
|
|
|
// Needs to be before `ogg` check
|
|
if (check([0x4F, 0x70, 0x75, 0x73, 0x48, 0x65, 0x61, 0x64], {offset: 28})) {
|
|
return {
|
|
ext: 'opus',
|
|
mime: 'audio/opus'
|
|
};
|
|
}
|
|
|
|
// If 'OggS' in first bytes, then OGG container
|
|
if (check([0x4F, 0x67, 0x67, 0x53])) {
|
|
// This is a OGG container
|
|
|
|
// If ' theora' in header.
|
|
if (check([0x80, 0x74, 0x68, 0x65, 0x6F, 0x72, 0x61], {offset: 28})) {
|
|
return {
|
|
ext: 'ogv',
|
|
mime: 'video/ogg'
|
|
};
|
|
}
|
|
// If '\x01video' in header.
|
|
if (check([0x01, 0x76, 0x69, 0x64, 0x65, 0x6F, 0x00], {offset: 28})) {
|
|
return {
|
|
ext: 'ogm',
|
|
mime: 'video/ogg'
|
|
};
|
|
}
|
|
// If ' FLAC' in header https://xiph.org/flac/faq.html
|
|
if (check([0x7F, 0x46, 0x4C, 0x41, 0x43], {offset: 28})) {
|
|
return {
|
|
ext: 'oga',
|
|
mime: 'audio/ogg'
|
|
};
|
|
}
|
|
|
|
// 'Speex ' in header https://en.wikipedia.org/wiki/Speex
|
|
if (check([0x53, 0x70, 0x65, 0x65, 0x78, 0x20, 0x20], {offset: 28})) {
|
|
return {
|
|
ext: 'spx',
|
|
mime: 'audio/ogg'
|
|
};
|
|
}
|
|
|
|
// If '\x01vorbis' in header
|
|
if (check([0x01, 0x76, 0x6F, 0x72, 0x62, 0x69, 0x73], {offset: 28})) {
|
|
return {
|
|
ext: 'ogg',
|
|
mime: 'audio/ogg'
|
|
};
|
|
}
|
|
|
|
// Default OGG container https://www.iana.org/assignments/media-types/application/ogg
|
|
return {
|
|
ext: 'ogx',
|
|
mime: 'application/ogg'
|
|
};
|
|
}
|
|
|
|
if (check([0x66, 0x4C, 0x61, 0x43])) {
|
|
return {
|
|
ext: 'flac',
|
|
mime: 'audio/x-flac'
|
|
};
|
|
}
|
|
|
|
if (check([0x4D, 0x41, 0x43, 0x20])) { // 'MAC '
|
|
return {
|
|
ext: 'ape',
|
|
mime: 'audio/ape'
|
|
};
|
|
}
|
|
|
|
if (check([0x77, 0x76, 0x70, 0x6B])) { // 'wvpk'
|
|
return {
|
|
ext: 'wv',
|
|
mime: 'audio/wavpack'
|
|
};
|
|
}
|
|
|
|
if (check([0x23, 0x21, 0x41, 0x4D, 0x52, 0x0A])) {
|
|
return {
|
|
ext: 'amr',
|
|
mime: 'audio/amr'
|
|
};
|
|
}
|
|
|
|
if (check([0x25, 0x50, 0x44, 0x46])) {
|
|
return {
|
|
ext: 'pdf',
|
|
mime: 'application/pdf'
|
|
};
|
|
}
|
|
|
|
if (check([0x4D, 0x5A])) {
|
|
return {
|
|
ext: 'exe',
|
|
mime: 'application/x-msdownload'
|
|
};
|
|
}
|
|
|
|
if (
|
|
(buf[0] === 0x43 || buf[0] === 0x46) &&
|
|
check([0x57, 0x53], {offset: 1})
|
|
) {
|
|
return {
|
|
ext: 'swf',
|
|
mime: 'application/x-shockwave-flash'
|
|
};
|
|
}
|
|
|
|
if (check([0x7B, 0x5C, 0x72, 0x74, 0x66])) {
|
|
return {
|
|
ext: 'rtf',
|
|
mime: 'application/rtf'
|
|
};
|
|
}
|
|
|
|
if (check([0x00, 0x61, 0x73, 0x6D])) {
|
|
return {
|
|
ext: 'wasm',
|
|
mime: 'application/wasm'
|
|
};
|
|
}
|
|
|
|
if (
|
|
check([0x77, 0x4F, 0x46, 0x46]) &&
|
|
(
|
|
check([0x00, 0x01, 0x00, 0x00], {offset: 4}) ||
|
|
check([0x4F, 0x54, 0x54, 0x4F], {offset: 4})
|
|
)
|
|
) {
|
|
return {
|
|
ext: 'woff',
|
|
mime: 'font/woff'
|
|
};
|
|
}
|
|
|
|
if (
|
|
check([0x77, 0x4F, 0x46, 0x32]) &&
|
|
(
|
|
check([0x00, 0x01, 0x00, 0x00], {offset: 4}) ||
|
|
check([0x4F, 0x54, 0x54, 0x4F], {offset: 4})
|
|
)
|
|
) {
|
|
return {
|
|
ext: 'woff2',
|
|
mime: 'font/woff2'
|
|
};
|
|
}
|
|
|
|
if (
|
|
check([0x4C, 0x50], {offset: 34}) &&
|
|
(
|
|
check([0x00, 0x00, 0x01], {offset: 8}) ||
|
|
check([0x01, 0x00, 0x02], {offset: 8}) ||
|
|
check([0x02, 0x00, 0x02], {offset: 8})
|
|
)
|
|
) {
|
|
return {
|
|
ext: 'eot',
|
|
mime: 'application/vnd.ms-fontobject'
|
|
};
|
|
}
|
|
|
|
if (check([0x00, 0x01, 0x00, 0x00, 0x00])) {
|
|
return {
|
|
ext: 'ttf',
|
|
mime: 'font/ttf'
|
|
};
|
|
}
|
|
|
|
if (check([0x4F, 0x54, 0x54, 0x4F, 0x00])) {
|
|
return {
|
|
ext: 'otf',
|
|
mime: 'font/otf'
|
|
};
|
|
}
|
|
|
|
if (check([0x00, 0x00, 0x01, 0x00])) {
|
|
return {
|
|
ext: 'ico',
|
|
mime: 'image/x-icon'
|
|
};
|
|
}
|
|
|
|
if (check([0x00, 0x00, 0x02, 0x00])) {
|
|
return {
|
|
ext: 'cur',
|
|
mime: 'image/x-icon'
|
|
};
|
|
}
|
|
|
|
if (check([0x46, 0x4C, 0x56, 0x01])) {
|
|
return {
|
|
ext: 'flv',
|
|
mime: 'video/x-flv'
|
|
};
|
|
}
|
|
|
|
if (check([0x25, 0x21])) {
|
|
return {
|
|
ext: 'ps',
|
|
mime: 'application/postscript'
|
|
};
|
|
}
|
|
|
|
if (check([0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00])) {
|
|
return {
|
|
ext: 'xz',
|
|
mime: 'application/x-xz'
|
|
};
|
|
}
|
|
|
|
if (check([0x53, 0x51, 0x4C, 0x69])) {
|
|
return {
|
|
ext: 'sqlite',
|
|
mime: 'application/x-sqlite3'
|
|
};
|
|
}
|
|
|
|
if (check([0x4E, 0x45, 0x53, 0x1A])) {
|
|
return {
|
|
ext: 'nes',
|
|
mime: 'application/x-nintendo-nes-rom'
|
|
};
|
|
}
|
|
|
|
if (check([0x43, 0x72, 0x32, 0x34])) {
|
|
return {
|
|
ext: 'crx',
|
|
mime: 'application/x-google-chrome-extension'
|
|
};
|
|
}
|
|
|
|
if (
|
|
check([0x4D, 0x53, 0x43, 0x46]) ||
|
|
check([0x49, 0x53, 0x63, 0x28])
|
|
) {
|
|
return {
|
|
ext: 'cab',
|
|
mime: 'application/vnd.ms-cab-compressed'
|
|
};
|
|
}
|
|
|
|
// Needs to be before `ar` check
|
|
if (check([0x21, 0x3C, 0x61, 0x72, 0x63, 0x68, 0x3E, 0x0A, 0x64, 0x65, 0x62, 0x69, 0x61, 0x6E, 0x2D, 0x62, 0x69, 0x6E, 0x61, 0x72, 0x79])) {
|
|
return {
|
|
ext: 'deb',
|
|
mime: 'application/x-deb'
|
|
};
|
|
}
|
|
|
|
if (check([0x21, 0x3C, 0x61, 0x72, 0x63, 0x68, 0x3E])) {
|
|
return {
|
|
ext: 'ar',
|
|
mime: 'application/x-unix-archive'
|
|
};
|
|
}
|
|
|
|
if (check([0xED, 0xAB, 0xEE, 0xDB])) {
|
|
return {
|
|
ext: 'rpm',
|
|
mime: 'application/x-rpm'
|
|
};
|
|
}
|
|
|
|
if (
|
|
check([0x1F, 0xA0]) ||
|
|
check([0x1F, 0x9D])
|
|
) {
|
|
return {
|
|
ext: 'Z',
|
|
mime: 'application/x-compress'
|
|
};
|
|
}
|
|
|
|
if (check([0x4C, 0x5A, 0x49, 0x50])) {
|
|
return {
|
|
ext: 'lz',
|
|
mime: 'application/x-lzip'
|
|
};
|
|
}
|
|
|
|
if (check([0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1])) {
|
|
return {
|
|
ext: 'msi',
|
|
mime: 'application/x-msi'
|
|
};
|
|
}
|
|
|
|
if (check([0x06, 0x0E, 0x2B, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0D, 0x01, 0x02, 0x01, 0x01, 0x02])) {
|
|
return {
|
|
ext: 'mxf',
|
|
mime: 'application/mxf'
|
|
};
|
|
}
|
|
|
|
if (check([0x47], {offset: 4}) && (check([0x47], {offset: 192}) || check([0x47], {offset: 196}))) {
|
|
return {
|
|
ext: 'mts',
|
|
mime: 'video/mp2t'
|
|
};
|
|
}
|
|
|
|
if (check([0x42, 0x4C, 0x45, 0x4E, 0x44, 0x45, 0x52])) {
|
|
return {
|
|
ext: 'blend',
|
|
mime: 'application/x-blender'
|
|
};
|
|
}
|
|
|
|
if (check([0x42, 0x50, 0x47, 0xFB])) {
|
|
return {
|
|
ext: 'bpg',
|
|
mime: 'image/bpg'
|
|
};
|
|
}
|
|
|
|
if (check([0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A])) {
|
|
// JPEG-2000 family
|
|
|
|
if (check([0x6A, 0x70, 0x32, 0x20], {offset: 20})) {
|
|
return {
|
|
ext: 'jp2',
|
|
mime: 'image/jp2'
|
|
};
|
|
}
|
|
|
|
if (check([0x6A, 0x70, 0x78, 0x20], {offset: 20})) {
|
|
return {
|
|
ext: 'jpx',
|
|
mime: 'image/jpx'
|
|
};
|
|
}
|
|
|
|
if (check([0x6A, 0x70, 0x6D, 0x20], {offset: 20})) {
|
|
return {
|
|
ext: 'jpm',
|
|
mime: 'image/jpm'
|
|
};
|
|
}
|
|
|
|
if (check([0x6D, 0x6A, 0x70, 0x32], {offset: 20})) {
|
|
return {
|
|
ext: 'mj2',
|
|
mime: 'image/mj2'
|
|
};
|
|
}
|
|
}
|
|
|
|
if (check([0x46, 0x4F, 0x52, 0x4D])) {
|
|
return {
|
|
ext: 'aif',
|
|
mime: 'audio/aiff'
|
|
};
|
|
}
|
|
|
|
if (checkString('<?xml ')) {
|
|
return {
|
|
ext: 'xml',
|
|
mime: 'application/xml'
|
|
};
|
|
}
|
|
|
|
if (check([0x42, 0x4F, 0x4F, 0x4B, 0x4D, 0x4F, 0x42, 0x49], {offset: 60})) {
|
|
return {
|
|
ext: 'mobi',
|
|
mime: 'application/x-mobipocket-ebook'
|
|
};
|
|
}
|
|
|
|
// File Type Box (https://en.wikipedia.org/wiki/ISO_base_media_file_format)
|
|
if (check([0x66, 0x74, 0x79, 0x70], {offset: 4})) {
|
|
if (check([0x6D, 0x69, 0x66, 0x31], {offset: 8})) {
|
|
return {
|
|
ext: 'heic',
|
|
mime: 'image/heif'
|
|
};
|
|
}
|
|
|
|
if (check([0x6D, 0x73, 0x66, 0x31], {offset: 8})) {
|
|
return {
|
|
ext: 'heic',
|
|
mime: 'image/heif-sequence'
|
|
};
|
|
}
|
|
|
|
if (check([0x68, 0x65, 0x69, 0x63], {offset: 8}) || check([0x68, 0x65, 0x69, 0x78], {offset: 8})) {
|
|
return {
|
|
ext: 'heic',
|
|
mime: 'image/heic'
|
|
};
|
|
}
|
|
|
|
if (check([0x68, 0x65, 0x76, 0x63], {offset: 8}) || check([0x68, 0x65, 0x76, 0x78], {offset: 8})) {
|
|
return {
|
|
ext: 'heic',
|
|
mime: 'image/heic-sequence'
|
|
};
|
|
}
|
|
}
|
|
|
|
if (check([0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A])) {
|
|
return {
|
|
ext: 'ktx',
|
|
mime: 'image/ktx'
|
|
};
|
|
}
|
|
|
|
if (check([0x44, 0x49, 0x43, 0x4D], {offset: 128})) {
|
|
return {
|
|
ext: 'dcm',
|
|
mime: 'application/dicom'
|
|
};
|
|
}
|
|
|
|
// Musepack, SV7
|
|
if (check([0x4D, 0x50, 0x2B])) {
|
|
return {
|
|
ext: 'mpc',
|
|
mime: 'audio/x-musepack'
|
|
};
|
|
}
|
|
|
|
// Musepack, SV8
|
|
if (check([0x4D, 0x50, 0x43, 0x4B])) {
|
|
return {
|
|
ext: 'mpc',
|
|
mime: 'audio/x-musepack'
|
|
};
|
|
}
|
|
|
|
if (check([0x42, 0x45, 0x47, 0x49, 0x4E, 0x3A])) {
|
|
return {
|
|
ext: 'ics',
|
|
mime: 'text/calendar'
|
|
};
|
|
}
|
|
|
|
if (check([0x67, 0x6C, 0x54, 0x46, 0x02, 0x00, 0x00, 0x00])) {
|
|
return {
|
|
ext: 'glb',
|
|
mime: 'model/gltf-binary'
|
|
};
|
|
}
|
|
|
|
return null;
|
|
};
|
|
|
|
Object.defineProperty(module.exports, 'minimumBytes', {value: 4100});
|