mirror of https://github.com/gchq/CyberChef.git
77 lines
1.7 KiB
JavaScript
77 lines
1.7 KiB
JavaScript
/**
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* @author d98762625 [d98762625@gmail.com]
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* @copyright Crown Copyright 2019
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* @license Apache-2.0
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*/
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import { detectFileType } from "../core/lib/FileType.mjs";
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/**
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* FileShim
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*
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* Create a class that behaves like the File object in the Browser so that
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* operations that use the File object still work.
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*
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* File doesn't write to disk, but it would be easy to do so with e.gfs.writeFile.
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*/
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class File {
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/**
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* Constructor
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*
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* https://w3c.github.io/FileAPI/#file-constructor
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*
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* @param {String|Array|ArrayBuffer|Buffer|[File]} bits - file content
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* @param {String} name (optional) - file name
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* @param {Object} stats (optional) - file stats e.g. lastModified
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*/
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constructor(data, name="", stats={}) {
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if (!Array.isArray(data)) {
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data = [data];
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}
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const buffers = data.map((d) => {
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if (d instanceof File) {
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return Buffer.from(d.data);
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}
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if (d instanceof ArrayBuffer) {
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return Buffer.from(d);
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}
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return Buffer.from(d);
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});
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const totalLength = buffers.reduce((p, c) => p + c.length, 0);
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this.data = Buffer.concat(buffers, totalLength);
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this.name = name;
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this.lastModified = stats.lastModified || Date.now();
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const types = detectFileType(this.data);
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if (types.length) {
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this.type = types[0].mime;
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} else {
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this.type = "application/unknown";
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}
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}
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/**
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* size property
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*/
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get size() {
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return this.data.length;
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}
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/**
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* Return lastModified as Date
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*/
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get lastModifiedDate() {
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return new Date(this.lastModified);
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}
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}
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export default File;
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