Move magicFileType function from Lagic lib into its own lib file, reducing cyclic dependencies in operations using newly names detectFileType

This commit is contained in:
d98762625 2019-01-23 10:39:38 +00:00
parent 6f8a5ea1be
commit 5ac4780fc8
9 changed files with 469 additions and 462 deletions

View File

@ -0,0 +1,450 @@
/**
* DetectFileType library
*
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2019
* @license Apache-2.0
*/
/**
* Given a buffer, detects magic byte sequences at specific positions and returns the
* extension and mime type.
*
* @param {Uint8Array} buf
* @returns {Object} type
* @returns {string} type.ext - File extension
* @returns {string} type.mime - Mime type
* @returns {string} [type.desc] - Description
*/
export default function detectFileType(buf) {
if (!(buf && buf.length > 1)) {
return null;
}
if (buf[0] === 0xFF && buf[1] === 0xD8 && buf[2] === 0xFF) {
return {
ext: "jpg",
mime: "image/jpeg"
};
}
if (buf[0] === 0x89 && buf[1] === 0x50 && buf[2] === 0x4E && buf[3] === 0x47) {
return {
ext: "png",
mime: "image/png"
};
}
if (buf[0] === 0x47 && buf[1] === 0x49 && buf[2] === 0x46) {
return {
ext: "gif",
mime: "image/gif"
};
}
if (buf[8] === 0x57 && buf[9] === 0x45 && buf[10] === 0x42 && buf[11] === 0x50) {
return {
ext: "webp",
mime: "image/webp"
};
}
// needs to be before `tif` check
if (((buf[0] === 0x49 && buf[1] === 0x49 && buf[2] === 0x2A && buf[3] === 0x0) || (buf[0] === 0x4D && buf[1] === 0x4D && buf[2] === 0x0 && buf[3] === 0x2A)) && buf[8] === 0x43 && buf[9] === 0x52) {
return {
ext: "cr2",
mime: "image/x-canon-cr2"
};
}
if ((buf[0] === 0x49 && buf[1] === 0x49 && buf[2] === 0x2A && buf[3] === 0x0) || (buf[0] === 0x4D && buf[1] === 0x4D && buf[2] === 0x0 && buf[3] === 0x2A)) {
return {
ext: "tif",
mime: "image/tiff"
};
}
if (buf[0] === 0x42 && buf[1] === 0x4D) {
return {
ext: "bmp",
mime: "image/bmp"
};
}
if (buf[0] === 0x49 && buf[1] === 0x49 && buf[2] === 0xBC) {
return {
ext: "jxr",
mime: "image/vnd.ms-photo"
};
}
if (buf[0] === 0x38 && buf[1] === 0x42 && buf[2] === 0x50 && buf[3] === 0x53) {
return {
ext: "psd",
mime: "image/vnd.adobe.photoshop"
};
}
// needs to be before `zip` check
if (buf[0] === 0x50 && buf[1] === 0x4B && buf[2] === 0x3 && buf[3] === 0x4 && buf[30] === 0x6D && buf[31] === 0x69 && buf[32] === 0x6D && buf[33] === 0x65 && buf[34] === 0x74 && buf[35] === 0x79 && buf[36] === 0x70 && buf[37] === 0x65 && buf[38] === 0x61 && buf[39] === 0x70 && buf[40] === 0x70 && buf[41] === 0x6C && buf[42] === 0x69 && buf[43] === 0x63 && buf[44] === 0x61 && buf[45] === 0x74 && buf[46] === 0x69 && buf[47] === 0x6F && buf[48] === 0x6E && buf[49] === 0x2F && buf[50] === 0x65 && buf[51] === 0x70 && buf[52] === 0x75 && buf[53] === 0x62 && buf[54] === 0x2B && buf[55] === 0x7A && buf[56] === 0x69 && buf[57] === 0x70) {
return {
ext: "epub",
mime: "application/epub+zip"
};
}
if (buf[0] === 0x50 && buf[1] === 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 (buf[257] === 0x75 && buf[258] === 0x73 && buf[259] === 0x74 && buf[260] === 0x61 && buf[261] === 0x72) {
return {
ext: "tar",
mime: "application/x-tar"
};
}
if (buf[0] === 0x52 && buf[1] === 0x61 && buf[2] === 0x72 && buf[3] === 0x21 && buf[4] === 0x1A && buf[5] === 0x7 && (buf[6] === 0x0 || buf[6] === 0x1)) {
return {
ext: "rar",
mime: "application/x-rar-compressed"
};
}
if (buf[0] === 0x1F && buf[1] === 0x8B && buf[2] === 0x8) {
return {
ext: "gz",
mime: "application/gzip"
};
}
if (buf[0] === 0x42 && buf[1] === 0x5A && buf[2] === 0x68) {
return {
ext: "bz2",
mime: "application/x-bzip2"
};
}
if (buf[0] === 0x37 && buf[1] === 0x7A && buf[2] === 0xBC && buf[3] === 0xAF && buf[4] === 0x27 && buf[5] === 0x1C) {
return {
ext: "7z",
mime: "application/x-7z-compressed"
};
}
if (buf[0] === 0x78 && buf[1] === 0x01) {
return {
ext: "dmg, zlib",
mime: "application/x-apple-diskimage, application/x-deflate"
};
}
if ((buf[0] === 0x0 && buf[1] === 0x0 && buf[2] === 0x0 && (buf[3] === 0x18 || buf[3] === 0x20) && buf[4] === 0x66 && buf[5] === 0x74 && buf[6] === 0x79 && buf[7] === 0x70) || (buf[0] === 0x33 && buf[1] === 0x67 && buf[2] === 0x70 && buf[3] === 0x35) || (buf[0] === 0x0 && buf[1] === 0x0 && buf[2] === 0x0 && buf[3] === 0x1C && buf[4] === 0x66 && buf[5] === 0x74 && buf[6] === 0x79 && buf[7] === 0x70 && buf[8] === 0x6D && buf[9] === 0x70 && buf[10] === 0x34 && buf[11] === 0x32 && buf[16] === 0x6D && buf[17] === 0x70 && buf[18] === 0x34 && buf[19] === 0x31 && buf[20] === 0x6D && buf[21] === 0x70 && buf[22] === 0x34 && buf[23] === 0x32 && buf[24] === 0x69 && buf[25] === 0x73 && buf[26] === 0x6F && buf[27] === 0x6D)) {
return {
ext: "mp4",
mime: "video/mp4"
};
}
if ((buf[0] === 0x0 && buf[1] === 0x0 && buf[2] === 0x0 && buf[3] === 0x1C && buf[4] === 0x66 && buf[5] === 0x74 && buf[6] === 0x79 && buf[7] === 0x70 && buf[8] === 0x4D && buf[9] === 0x34 && buf[10] === 0x56)) {
return {
ext: "m4v",
mime: "video/x-m4v"
};
}
if (buf[0] === 0x4D && buf[1] === 0x54 && buf[2] === 0x68 && buf[3] === 0x64) {
return {
ext: "mid",
mime: "audio/midi"
};
}
// needs to be before the `webm` check
if (buf[31] === 0x6D && buf[32] === 0x61 && buf[33] === 0x74 && buf[34] === 0x72 && buf[35] === 0x6f && buf[36] === 0x73 && buf[37] === 0x6B && buf[38] === 0x61) {
return {
ext: "mkv",
mime: "video/x-matroska"
};
}
if (buf[0] === 0x1A && buf[1] === 0x45 && buf[2] === 0xDF && buf[3] === 0xA3) {
return {
ext: "webm",
mime: "video/webm"
};
}
if (buf[0] === 0x0 && buf[1] === 0x0 && buf[2] === 0x0 && buf[3] === 0x14 && buf[4] === 0x66 && buf[5] === 0x74 && buf[6] === 0x79 && buf[7] === 0x70) {
return {
ext: "mov",
mime: "video/quicktime"
};
}
if (buf[0] === 0x52 && buf[1] === 0x49 && buf[2] === 0x46 && buf[3] === 0x46 && buf[8] === 0x41 && buf[9] === 0x56 && buf[10] === 0x49) {
return {
ext: "avi",
mime: "video/x-msvideo"
};
}
if (buf[0] === 0x30 && buf[1] === 0x26 && buf[2] === 0xB2 && buf[3] === 0x75 && buf[4] === 0x8E && buf[5] === 0x66 && buf[6] === 0xCF && buf[7] === 0x11 && buf[8] === 0xA6 && buf[9] === 0xD9) {
return {
ext: "wmv",
mime: "video/x-ms-wmv"
};
}
if (buf[0] === 0x0 && buf[1] === 0x0 && buf[2] === 0x1 && buf[3].toString(16)[0] === "b") {
return {
ext: "mpg",
mime: "video/mpeg"
};
}
if ((buf[0] === 0x49 && buf[1] === 0x44 && buf[2] === 0x33) || (buf[0] === 0xFF && buf[1] === 0xfb)) {
return {
ext: "mp3",
mime: "audio/mpeg"
};
}
if ((buf[4] === 0x66 && buf[5] === 0x74 && buf[6] === 0x79 && buf[7] === 0x70 && buf[8] === 0x4D && buf[9] === 0x34 && buf[10] === 0x41) || (buf[0] === 0x4D && buf[1] === 0x34 && buf[2] === 0x41 && buf[3] === 0x20)) {
return {
ext: "m4a",
mime: "audio/m4a"
};
}
if (buf[0] === 0x4F && buf[1] === 0x67 && buf[2] === 0x67 && buf[3] === 0x53) {
return {
ext: "ogg",
mime: "audio/ogg"
};
}
if (buf[0] === 0x66 && buf[1] === 0x4C && buf[2] === 0x61 && buf[3] === 0x43) {
return {
ext: "flac",
mime: "audio/x-flac"
};
}
if (buf[0] === 0x52 && buf[1] === 0x49 && buf[2] === 0x46 && buf[3] === 0x46 && buf[8] === 0x57 && buf[9] === 0x41 && buf[10] === 0x56 && buf[11] === 0x45) {
return {
ext: "wav",
mime: "audio/x-wav"
};
}
if (buf[0] === 0x23 && buf[1] === 0x21 && buf[2] === 0x41 && buf[3] === 0x4D && buf[4] === 0x52 && buf[5] === 0x0A) {
return {
ext: "amr",
mime: "audio/amr"
};
}
if (buf[0] === 0x25 && buf[1] === 0x50 && buf[2] === 0x44 && buf[3] === 0x46) {
return {
ext: "pdf",
mime: "application/pdf"
};
}
if (buf[0] === 0x4D && buf[1] === 0x5A) {
return {
ext: "exe",
mime: "application/x-msdownload"
};
}
if ((buf[0] === 0x43 || buf[0] === 0x46) && buf[1] === 0x57 && buf[2] === 0x53) {
return {
ext: "swf",
mime: "application/x-shockwave-flash"
};
}
if (buf[0] === 0x7B && buf[1] === 0x5C && buf[2] === 0x72 && buf[3] === 0x74 && buf[4] === 0x66) {
return {
ext: "rtf",
mime: "application/rtf"
};
}
if (buf[0] === 0x77 && buf[1] === 0x4F && buf[2] === 0x46 && buf[3] === 0x46 && buf[4] === 0x00 && buf[5] === 0x01 && buf[6] === 0x00 && buf[7] === 0x00) {
return {
ext: "woff",
mime: "application/font-woff"
};
}
if (buf[0] === 0x77 && buf[1] === 0x4F && buf[2] === 0x46 && buf[3] === 0x32 && buf[4] === 0x00 && buf[5] === 0x01 && buf[6] === 0x00 && buf[7] === 0x00) {
return {
ext: "woff2",
mime: "application/font-woff"
};
}
if (buf[34] === 0x4C && buf[35] === 0x50 && ((buf[8] === 0x02 && buf[9] === 0x00 && buf[10] === 0x01) || (buf[8] === 0x01 && buf[9] === 0x00 && buf[10] === 0x00) || (buf[8] === 0x02 && buf[9] === 0x00 && buf[10] === 0x02))) {
return {
ext: "eot",
mime: "application/octet-stream"
};
}
if (buf[0] === 0x00 && buf[1] === 0x01 && buf[2] === 0x00 && buf[3] === 0x00 && buf[4] === 0x00) {
return {
ext: "ttf",
mime: "application/font-sfnt"
};
}
if (buf[0] === 0x4F && buf[1] === 0x54 && buf[2] === 0x54 && buf[3] === 0x4F && buf[4] === 0x00) {
return {
ext: "otf",
mime: "application/font-sfnt"
};
}
if (buf[0] === 0x00 && buf[1] === 0x00 && buf[2] === 0x01 && buf[3] === 0x00) {
return {
ext: "ico",
mime: "image/x-icon"
};
}
if (buf[0] === 0x46 && buf[1] === 0x4C && buf[2] === 0x56 && buf[3] === 0x01) {
return {
ext: "flv",
mime: "video/x-flv"
};
}
if (buf[0] === 0x25 && buf[1] === 0x21) {
return {
ext: "ps",
mime: "application/postscript"
};
}
if (buf[0] === 0xFD && buf[1] === 0x37 && buf[2] === 0x7A && buf[3] === 0x58 && buf[4] === 0x5A && buf[5] === 0x00) {
return {
ext: "xz",
mime: "application/x-xz"
};
}
if (buf[0] === 0x53 && buf[1] === 0x51 && buf[2] === 0x4C && buf[3] === 0x69) {
return {
ext: "sqlite",
mime: "application/x-sqlite3"
};
}
/**
*
* Added by n1474335 [n1474335@gmail.com] from here on
*
*/
if ((buf[0] === 0x1F && buf[1] === 0x9D) || (buf[0] === 0x1F && buf[1] === 0xA0)) {
return {
ext: "z, tar.z",
mime: "application/x-gtar"
};
}
if (buf[0] === 0x7F && buf[1] === 0x45 && buf[2] === 0x4C && buf[3] === 0x46) {
return {
ext: "none, axf, bin, elf, o, prx, puff, so",
mime: "application/x-executable",
desc: "Executable and Linkable Format file. No standard file extension."
};
}
if (buf[0] === 0xCA && buf[1] === 0xFE && buf[2] === 0xBA && buf[3] === 0xBE) {
return {
ext: "class",
mime: "application/java-vm"
};
}
if (buf[0] === 0xEF && buf[1] === 0xBB && buf[2] === 0xBF) {
return {
ext: "txt",
mime: "text/plain",
desc: "UTF-8 encoded Unicode byte order mark detected, commonly but not exclusively seen in text files."
};
}
// Must be before Little-endian UTF-16 BOM
if (buf[0] === 0xFF && buf[1] === 0xFE && buf[2] === 0x00 && buf[3] === 0x00) {
return {
ext: "UTF32LE",
mime: "charset/utf32le",
desc: "Little-endian UTF-32 encoded Unicode byte order mark detected."
};
}
if (buf[0] === 0xFF && buf[1] === 0xFE) {
return {
ext: "UTF16LE",
mime: "charset/utf16le",
desc: "Little-endian UTF-16 encoded Unicode byte order mark detected."
};
}
if ((buf[0x8001] === 0x43 && buf[0x8002] === 0x44 && buf[0x8003] === 0x30 && buf[0x8004] === 0x30 && buf[0x8005] === 0x31) ||
(buf[0x8801] === 0x43 && buf[0x8802] === 0x44 && buf[0x8803] === 0x30 && buf[0x8804] === 0x30 && buf[0x8805] === 0x31) ||
(buf[0x9001] === 0x43 && buf[0x9002] === 0x44 && buf[0x9003] === 0x30 && buf[0x9004] === 0x30 && buf[0x9005] === 0x31)) {
return {
ext: "iso",
mime: "application/octet-stream",
desc: "ISO 9660 CD/DVD image file"
};
}
if (buf[0] === 0xD0 && buf[1] === 0xCF && buf[2] === 0x11 && buf[3] === 0xE0 && buf[4] === 0xA1 && buf[5] === 0xB1 && buf[6] === 0x1A && buf[7] === 0xE1) {
return {
ext: "doc, xls, ppt",
mime: "application/msword, application/vnd.ms-excel, application/vnd.ms-powerpoint",
desc: "Microsoft Office documents"
};
}
if (buf[0] === 0x64 && buf[1] === 0x65 && buf[2] === 0x78 && buf[3] === 0x0A && buf[4] === 0x30 && buf[5] === 0x33 && buf[6] === 0x35 && buf[7] === 0x00) {
return {
ext: "dex",
mime: "application/octet-stream",
desc: "Dalvik Executable (Android)"
};
}
if (buf[0] === 0x4B && buf[1] === 0x44 && buf[2] === 0x4D) {
return {
ext: "vmdk",
mime: "application/vmdk, application/x-virtualbox-vmdk"
};
}
if (buf[0] === 0x43 && buf[1] === 0x72 && buf[2] === 0x32 && buf[3] === 0x34) {
return {
ext: "crx",
mime: "application/crx",
desc: "Google Chrome extension or packaged app"
};
}
if (buf[0] === 0x78 && (buf[1] === 0x01 || buf[1] === 0x9C || buf[1] === 0xDA || buf[1] === 0x5e)) {
return {
ext: "zlib",
mime: "application/x-deflate"
};
}
return null;
}

View File

@ -3,6 +3,7 @@ import Utils from "../Utils";
import Recipe from "../Recipe";
import Dish from "../Dish";
import chiSquared from "chi-squared";
import detectFileType from "./DetectFileType";
/**
* A class for detecting encodings, file types and byte frequencies and
@ -92,7 +93,7 @@ class Magic {
* @returns {string} [type.desc] - Description
*/
detectFileType() {
return Magic.magicFileType(this.inputBuffer);
return detectFileType(this.inputBuffer);
}
/**
@ -785,450 +786,6 @@ class Magic {
}[code];
}
/**
* Given a buffer, detects magic byte sequences at specific positions and returns the
* extension and mime type.
*
* @param {Uint8Array} buf
* @returns {Object} type
* @returns {string} type.ext - File extension
* @returns {string} type.mime - Mime type
* @returns {string} [type.desc] - Description
*/
static magicFileType(buf) {
if (!(buf && buf.length > 1)) {
return null;
}
if (buf[0] === 0xFF && buf[1] === 0xD8 && buf[2] === 0xFF) {
return {
ext: "jpg",
mime: "image/jpeg"
};
}
if (buf[0] === 0x89 && buf[1] === 0x50 && buf[2] === 0x4E && buf[3] === 0x47) {
return {
ext: "png",
mime: "image/png"
};
}
if (buf[0] === 0x47 && buf[1] === 0x49 && buf[2] === 0x46) {
return {
ext: "gif",
mime: "image/gif"
};
}
if (buf[8] === 0x57 && buf[9] === 0x45 && buf[10] === 0x42 && buf[11] === 0x50) {
return {
ext: "webp",
mime: "image/webp"
};
}
// needs to be before `tif` check
if (((buf[0] === 0x49 && buf[1] === 0x49 && buf[2] === 0x2A && buf[3] === 0x0) || (buf[0] === 0x4D && buf[1] === 0x4D && buf[2] === 0x0 && buf[3] === 0x2A)) && buf[8] === 0x43 && buf[9] === 0x52) {
return {
ext: "cr2",
mime: "image/x-canon-cr2"
};
}
if ((buf[0] === 0x49 && buf[1] === 0x49 && buf[2] === 0x2A && buf[3] === 0x0) || (buf[0] === 0x4D && buf[1] === 0x4D && buf[2] === 0x0 && buf[3] === 0x2A)) {
return {
ext: "tif",
mime: "image/tiff"
};
}
if (buf[0] === 0x42 && buf[1] === 0x4D) {
return {
ext: "bmp",
mime: "image/bmp"
};
}
if (buf[0] === 0x49 && buf[1] === 0x49 && buf[2] === 0xBC) {
return {
ext: "jxr",
mime: "image/vnd.ms-photo"
};
}
if (buf[0] === 0x38 && buf[1] === 0x42 && buf[2] === 0x50 && buf[3] === 0x53) {
return {
ext: "psd",
mime: "image/vnd.adobe.photoshop"
};
}
// needs to be before `zip` check
if (buf[0] === 0x50 && buf[1] === 0x4B && buf[2] === 0x3 && buf[3] === 0x4 && buf[30] === 0x6D && buf[31] === 0x69 && buf[32] === 0x6D && buf[33] === 0x65 && buf[34] === 0x74 && buf[35] === 0x79 && buf[36] === 0x70 && buf[37] === 0x65 && buf[38] === 0x61 && buf[39] === 0x70 && buf[40] === 0x70 && buf[41] === 0x6C && buf[42] === 0x69 && buf[43] === 0x63 && buf[44] === 0x61 && buf[45] === 0x74 && buf[46] === 0x69 && buf[47] === 0x6F && buf[48] === 0x6E && buf[49] === 0x2F && buf[50] === 0x65 && buf[51] === 0x70 && buf[52] === 0x75 && buf[53] === 0x62 && buf[54] === 0x2B && buf[55] === 0x7A && buf[56] === 0x69 && buf[57] === 0x70) {
return {
ext: "epub",
mime: "application/epub+zip"
};
}
if (buf[0] === 0x50 && buf[1] === 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 (buf[257] === 0x75 && buf[258] === 0x73 && buf[259] === 0x74 && buf[260] === 0x61 && buf[261] === 0x72) {
return {
ext: "tar",
mime: "application/x-tar"
};
}
if (buf[0] === 0x52 && buf[1] === 0x61 && buf[2] === 0x72 && buf[3] === 0x21 && buf[4] === 0x1A && buf[5] === 0x7 && (buf[6] === 0x0 || buf[6] === 0x1)) {
return {
ext: "rar",
mime: "application/x-rar-compressed"
};
}
if (buf[0] === 0x1F && buf[1] === 0x8B && buf[2] === 0x8) {
return {
ext: "gz",
mime: "application/gzip"
};
}
if (buf[0] === 0x42 && buf[1] === 0x5A && buf[2] === 0x68) {
return {
ext: "bz2",
mime: "application/x-bzip2"
};
}
if (buf[0] === 0x37 && buf[1] === 0x7A && buf[2] === 0xBC && buf[3] === 0xAF && buf[4] === 0x27 && buf[5] === 0x1C) {
return {
ext: "7z",
mime: "application/x-7z-compressed"
};
}
if (buf[0] === 0x78 && buf[1] === 0x01) {
return {
ext: "dmg, zlib",
mime: "application/x-apple-diskimage, application/x-deflate"
};
}
if ((buf[0] === 0x0 && buf[1] === 0x0 && buf[2] === 0x0 && (buf[3] === 0x18 || buf[3] === 0x20) && buf[4] === 0x66 && buf[5] === 0x74 && buf[6] === 0x79 && buf[7] === 0x70) || (buf[0] === 0x33 && buf[1] === 0x67 && buf[2] === 0x70 && buf[3] === 0x35) || (buf[0] === 0x0 && buf[1] === 0x0 && buf[2] === 0x0 && buf[3] === 0x1C && buf[4] === 0x66 && buf[5] === 0x74 && buf[6] === 0x79 && buf[7] === 0x70 && buf[8] === 0x6D && buf[9] === 0x70 && buf[10] === 0x34 && buf[11] === 0x32 && buf[16] === 0x6D && buf[17] === 0x70 && buf[18] === 0x34 && buf[19] === 0x31 && buf[20] === 0x6D && buf[21] === 0x70 && buf[22] === 0x34 && buf[23] === 0x32 && buf[24] === 0x69 && buf[25] === 0x73 && buf[26] === 0x6F && buf[27] === 0x6D)) {
return {
ext: "mp4",
mime: "video/mp4"
};
}
if ((buf[0] === 0x0 && buf[1] === 0x0 && buf[2] === 0x0 && buf[3] === 0x1C && buf[4] === 0x66 && buf[5] === 0x74 && buf[6] === 0x79 && buf[7] === 0x70 && buf[8] === 0x4D && buf[9] === 0x34 && buf[10] === 0x56)) {
return {
ext: "m4v",
mime: "video/x-m4v"
};
}
if (buf[0] === 0x4D && buf[1] === 0x54 && buf[2] === 0x68 && buf[3] === 0x64) {
return {
ext: "mid",
mime: "audio/midi"
};
}
// needs to be before the `webm` check
if (buf[31] === 0x6D && buf[32] === 0x61 && buf[33] === 0x74 && buf[34] === 0x72 && buf[35] === 0x6f && buf[36] === 0x73 && buf[37] === 0x6B && buf[38] === 0x61) {
return {
ext: "mkv",
mime: "video/x-matroska"
};
}
if (buf[0] === 0x1A && buf[1] === 0x45 && buf[2] === 0xDF && buf[3] === 0xA3) {
return {
ext: "webm",
mime: "video/webm"
};
}
if (buf[0] === 0x0 && buf[1] === 0x0 && buf[2] === 0x0 && buf[3] === 0x14 && buf[4] === 0x66 && buf[5] === 0x74 && buf[6] === 0x79 && buf[7] === 0x70) {
return {
ext: "mov",
mime: "video/quicktime"
};
}
if (buf[0] === 0x52 && buf[1] === 0x49 && buf[2] === 0x46 && buf[3] === 0x46 && buf[8] === 0x41 && buf[9] === 0x56 && buf[10] === 0x49) {
return {
ext: "avi",
mime: "video/x-msvideo"
};
}
if (buf[0] === 0x30 && buf[1] === 0x26 && buf[2] === 0xB2 && buf[3] === 0x75 && buf[4] === 0x8E && buf[5] === 0x66 && buf[6] === 0xCF && buf[7] === 0x11 && buf[8] === 0xA6 && buf[9] === 0xD9) {
return {
ext: "wmv",
mime: "video/x-ms-wmv"
};
}
if (buf[0] === 0x0 && buf[1] === 0x0 && buf[2] === 0x1 && buf[3].toString(16)[0] === "b") {
return {
ext: "mpg",
mime: "video/mpeg"
};
}
if ((buf[0] === 0x49 && buf[1] === 0x44 && buf[2] === 0x33) || (buf[0] === 0xFF && buf[1] === 0xfb)) {
return {
ext: "mp3",
mime: "audio/mpeg"
};
}
if ((buf[4] === 0x66 && buf[5] === 0x74 && buf[6] === 0x79 && buf[7] === 0x70 && buf[8] === 0x4D && buf[9] === 0x34 && buf[10] === 0x41) || (buf[0] === 0x4D && buf[1] === 0x34 && buf[2] === 0x41 && buf[3] === 0x20)) {
return {
ext: "m4a",
mime: "audio/m4a"
};
}
if (buf[0] === 0x4F && buf[1] === 0x67 && buf[2] === 0x67 && buf[3] === 0x53) {
return {
ext: "ogg",
mime: "audio/ogg"
};
}
if (buf[0] === 0x66 && buf[1] === 0x4C && buf[2] === 0x61 && buf[3] === 0x43) {
return {
ext: "flac",
mime: "audio/x-flac"
};
}
if (buf[0] === 0x52 && buf[1] === 0x49 && buf[2] === 0x46 && buf[3] === 0x46 && buf[8] === 0x57 && buf[9] === 0x41 && buf[10] === 0x56 && buf[11] === 0x45) {
return {
ext: "wav",
mime: "audio/x-wav"
};
}
if (buf[0] === 0x23 && buf[1] === 0x21 && buf[2] === 0x41 && buf[3] === 0x4D && buf[4] === 0x52 && buf[5] === 0x0A) {
return {
ext: "amr",
mime: "audio/amr"
};
}
if (buf[0] === 0x25 && buf[1] === 0x50 && buf[2] === 0x44 && buf[3] === 0x46) {
return {
ext: "pdf",
mime: "application/pdf"
};
}
if (buf[0] === 0x4D && buf[1] === 0x5A) {
return {
ext: "exe",
mime: "application/x-msdownload"
};
}
if ((buf[0] === 0x43 || buf[0] === 0x46) && buf[1] === 0x57 && buf[2] === 0x53) {
return {
ext: "swf",
mime: "application/x-shockwave-flash"
};
}
if (buf[0] === 0x7B && buf[1] === 0x5C && buf[2] === 0x72 && buf[3] === 0x74 && buf[4] === 0x66) {
return {
ext: "rtf",
mime: "application/rtf"
};
}
if (buf[0] === 0x77 && buf[1] === 0x4F && buf[2] === 0x46 && buf[3] === 0x46 && buf[4] === 0x00 && buf[5] === 0x01 && buf[6] === 0x00 && buf[7] === 0x00) {
return {
ext: "woff",
mime: "application/font-woff"
};
}
if (buf[0] === 0x77 && buf[1] === 0x4F && buf[2] === 0x46 && buf[3] === 0x32 && buf[4] === 0x00 && buf[5] === 0x01 && buf[6] === 0x00 && buf[7] === 0x00) {
return {
ext: "woff2",
mime: "application/font-woff"
};
}
if (buf[34] === 0x4C && buf[35] === 0x50 && ((buf[8] === 0x02 && buf[9] === 0x00 && buf[10] === 0x01) || (buf[8] === 0x01 && buf[9] === 0x00 && buf[10] === 0x00) || (buf[8] === 0x02 && buf[9] === 0x00 && buf[10] === 0x02))) {
return {
ext: "eot",
mime: "application/octet-stream"
};
}
if (buf[0] === 0x00 && buf[1] === 0x01 && buf[2] === 0x00 && buf[3] === 0x00 && buf[4] === 0x00) {
return {
ext: "ttf",
mime: "application/font-sfnt"
};
}
if (buf[0] === 0x4F && buf[1] === 0x54 && buf[2] === 0x54 && buf[3] === 0x4F && buf[4] === 0x00) {
return {
ext: "otf",
mime: "application/font-sfnt"
};
}
if (buf[0] === 0x00 && buf[1] === 0x00 && buf[2] === 0x01 && buf[3] === 0x00) {
return {
ext: "ico",
mime: "image/x-icon"
};
}
if (buf[0] === 0x46 && buf[1] === 0x4C && buf[2] === 0x56 && buf[3] === 0x01) {
return {
ext: "flv",
mime: "video/x-flv"
};
}
if (buf[0] === 0x25 && buf[1] === 0x21) {
return {
ext: "ps",
mime: "application/postscript"
};
}
if (buf[0] === 0xFD && buf[1] === 0x37 && buf[2] === 0x7A && buf[3] === 0x58 && buf[4] === 0x5A && buf[5] === 0x00) {
return {
ext: "xz",
mime: "application/x-xz"
};
}
if (buf[0] === 0x53 && buf[1] === 0x51 && buf[2] === 0x4C && buf[3] === 0x69) {
return {
ext: "sqlite",
mime: "application/x-sqlite3"
};
}
/**
*
* Added by n1474335 [n1474335@gmail.com] from here on
*
*/
if ((buf[0] === 0x1F && buf[1] === 0x9D) || (buf[0] === 0x1F && buf[1] === 0xA0)) {
return {
ext: "z, tar.z",
mime: "application/x-gtar"
};
}
if (buf[0] === 0x7F && buf[1] === 0x45 && buf[2] === 0x4C && buf[3] === 0x46) {
return {
ext: "none, axf, bin, elf, o, prx, puff, so",
mime: "application/x-executable",
desc: "Executable and Linkable Format file. No standard file extension."
};
}
if (buf[0] === 0xCA && buf[1] === 0xFE && buf[2] === 0xBA && buf[3] === 0xBE) {
return {
ext: "class",
mime: "application/java-vm"
};
}
if (buf[0] === 0xEF && buf[1] === 0xBB && buf[2] === 0xBF) {
return {
ext: "txt",
mime: "text/plain",
desc: "UTF-8 encoded Unicode byte order mark detected, commonly but not exclusively seen in text files."
};
}
// Must be before Little-endian UTF-16 BOM
if (buf[0] === 0xFF && buf[1] === 0xFE && buf[2] === 0x00 && buf[3] === 0x00) {
return {
ext: "UTF32LE",
mime: "charset/utf32le",
desc: "Little-endian UTF-32 encoded Unicode byte order mark detected."
};
}
if (buf[0] === 0xFF && buf[1] === 0xFE) {
return {
ext: "UTF16LE",
mime: "charset/utf16le",
desc: "Little-endian UTF-16 encoded Unicode byte order mark detected."
};
}
if ((buf[0x8001] === 0x43 && buf[0x8002] === 0x44 && buf[0x8003] === 0x30 && buf[0x8004] === 0x30 && buf[0x8005] === 0x31) ||
(buf[0x8801] === 0x43 && buf[0x8802] === 0x44 && buf[0x8803] === 0x30 && buf[0x8804] === 0x30 && buf[0x8805] === 0x31) ||
(buf[0x9001] === 0x43 && buf[0x9002] === 0x44 && buf[0x9003] === 0x30 && buf[0x9004] === 0x30 && buf[0x9005] === 0x31)) {
return {
ext: "iso",
mime: "application/octet-stream",
desc: "ISO 9660 CD/DVD image file"
};
}
if (buf[0] === 0xD0 && buf[1] === 0xCF && buf[2] === 0x11 && buf[3] === 0xE0 && buf[4] === 0xA1 && buf[5] === 0xB1 && buf[6] === 0x1A && buf[7] === 0xE1) {
return {
ext: "doc, xls, ppt",
mime: "application/msword, application/vnd.ms-excel, application/vnd.ms-powerpoint",
desc: "Microsoft Office documents"
};
}
if (buf[0] === 0x64 && buf[1] === 0x65 && buf[2] === 0x78 && buf[3] === 0x0A && buf[4] === 0x30 && buf[5] === 0x33 && buf[6] === 0x35 && buf[7] === 0x00) {
return {
ext: "dex",
mime: "application/octet-stream",
desc: "Dalvik Executable (Android)"
};
}
if (buf[0] === 0x4B && buf[1] === 0x44 && buf[2] === 0x4D) {
return {
ext: "vmdk",
mime: "application/vmdk, application/x-virtualbox-vmdk"
};
}
if (buf[0] === 0x43 && buf[1] === 0x72 && buf[2] === 0x32 && buf[3] === 0x34) {
return {
ext: "crx",
mime: "application/crx",
desc: "Google Chrome extension or packaged app"
};
}
if (buf[0] === 0x78 && (buf[1] === 0x01 || buf[1] === 0x9C || buf[1] === 0xDA || buf[1] === 0x5e)) {
return {
ext: "zlib",
mime: "application/x-deflate"
};
}
return null;
}
}
/**

View File

@ -5,7 +5,7 @@
*/
import Operation from "../Operation";
import Magic from "../lib/Magic";
import detectFileType from "../lib/DetectFileType";
/**
* Detect File Type operation
@ -34,7 +34,7 @@ class DetectFileType extends Operation {
*/
run(input, args) {
const data = new Uint8Array(input),
type = Magic.magicFileType(data);
type = detectFileType(data);
if (!type) {
return "Unknown file type. Have you tried checking the entropy of this data to determine whether it might be encrypted or compressed?";

View File

@ -4,12 +4,12 @@
* @license Apache-2.0
*/
import detectFileType from "../lib/DetectFileType";
import Operation from "../Operation";
import OperationError from "../errors/OperationError";
import qr from "qr-image";
import { toBase64 } from "../lib/Base64";
import Magic from "../lib/Magic";
import Utils from "../Utils";
import { toBase64 } from "../lib/Base64";
/**
* Generate QR Code operation
@ -100,7 +100,7 @@ class GenerateQRCode extends Operation {
if (format === "PNG") {
let dataURI = "data:";
const type = Magic.magicFileType(data);
const type = detectFileType(data);
if (type && type.mime.indexOf("image") === 0){
dataURI += type.mime + ";";
} else {

View File

@ -4,9 +4,9 @@
* @license Apache-2.0
*/
import detectFileType from "../lib/DetectFileType";
import Operation from "../Operation";
import OperationError from "../errors/OperationError";
import Magic from "../lib/Magic";
import jsqr from "jsqr";
import jimp from "jimp";
@ -42,7 +42,7 @@ class ParseQRCode extends Operation {
* @returns {string}
*/
async run(input, args) {
const type = Magic.magicFileType(input);
const type = detectFileType(input);
const [normalise] = args;
// Make sure that the input is an image

View File

@ -6,10 +6,10 @@
import { fromBase64, toBase64 } from "../lib/Base64";
import { fromHex } from "../lib/Hex";
import detectFileType from "../lib/DetectFileType";
import Operation from "../Operation";
import OperationError from "../errors/OperationError";
import Utils from "../Utils";
import Magic from "../lib/Magic";
/**
* PlayMedia operation
@ -66,7 +66,7 @@ class PlayMedia extends Operation {
// Determine file type
const type = Magic.magicFileType(input);
const type = detectFileType(input);
if (!(type && /^audio|video/.test(type.mime))) {
throw new OperationError("Invalid or unrecognised file type");
}
@ -84,7 +84,7 @@ class PlayMedia extends Operation {
async present(data) {
if (!data.length) return "";
const type = Magic.magicFileType(data);
const type = detectFileType(data);
const matches = /^audio|video/.exec(type.mime);
if (!matches) {
throw new OperationError("Invalid file type");

View File

@ -9,7 +9,7 @@ import { fromHex } from "../lib/Hex";
import Operation from "../Operation";
import OperationError from "../errors/OperationError";
import Utils from "../Utils";
import Magic from "../lib/Magic";
import detectFileType from "../lib/DetectFileType";
/**
* Render Image operation
@ -72,7 +72,7 @@ class RenderImage extends Operation {
}
// Determine file type
const type = Magic.magicFileType(input);
const type = detectFileType(input);
if (!(type && type.mime.indexOf("image") === 0)) {
throw new OperationError("Invalid file type");
}
@ -92,7 +92,7 @@ class RenderImage extends Operation {
let dataURI = "data:";
// Determine file type
const type = Magic.magicFileType(data);
const type = detectFileType(data);
if (type && type.mime.indexOf("image") === 0) {
dataURI += type.mime + ";";
} else {

View File

@ -6,7 +6,7 @@
import Operation from "../Operation";
import Utils from "../Utils";
import Magic from "../lib/Magic";
import detectFileType from "../lib/DetectFileType";
/**
* Scan for Embedded Files operation
@ -49,7 +49,7 @@ class ScanForEmbeddedFiles extends Operation {
data = new Uint8Array(input);
for (let i = 0; i < data.length; i++) {
type = Magic.magicFileType(data.slice(i));
type = detectFileType(data.slice(i));
if (type) {
if (ignoreCommon && commonExts.indexOf(type.ext) > -1) {
numCommonFound++;

View File

@ -7,7 +7,7 @@
import Operation from "../Operation";
import OperationError from "../errors/OperationError";
import Utils from "../Utils";
import Magic from "../lib/Magic";
import detectFileType from "../lib/DetectFileType";
import jimp from "jimp";
@ -38,7 +38,7 @@ class SplitColourChannels extends Operation {
* @returns {List<File>}
*/
async run(input, args) {
const type = Magic.magicFileType(input);
const type = detectFileType(input);
// Make sure that the input is an image
if (type && type.mime.indexOf("image") === 0) {
const parsedImage = await jimp.read(Buffer.from(input));