CyberChef/src/web/workers/ZipWorker.mjs

73 lines
2 KiB
JavaScript

/**
* Web Worker to handle zipping the outputs for download.
*
* @author j433866 [j433866@gmail.com]
* @copyright Crown Copyright 2019
* @license Apache-2.0
*/
import zip from "zlibjs/bin/zip.min.js";
import Utils from "../../core/Utils.mjs";
import Dish from "../../core/Dish.mjs";
import {detectFileType} from "../../core/lib/FileType.mjs";
const Zlib = zip.Zlib;
/**
* Respond to message from parent thread.
*/
self.addEventListener("message", function(e) {
const r = e.data;
if (!("outputs" in r)) {
log.error("No files were passed to the ZipWorker.");
return;
}
if (!("filename" in r)) {
log.error("No filename was passed to the ZipWorker");
return;
}
self.zipFiles(r.outputs, r.filename, r.fileExtension);
});
self.setOption = function(...args) {};
/**
* Compress the files into a zip file and send the zip back
* to the OutputWaiter.
*
* @param {object} outputs
* @param {string} filename
* @param {string} fileExtension
*/
self.zipFiles = async function(outputs, filename, fileExtension) {
const zip = new Zlib.Zip();
const inputNums = Object.keys(outputs);
for (let i = 0; i < inputNums.length; i++) {
const iNum = inputNums[i];
let ext = fileExtension;
const cloned = new Dish(outputs[iNum].data.dish);
const output = new Uint8Array(await cloned.get(Dish.ARRAY_BUFFER));
if (fileExtension === undefined || fileExtension === "") {
// Detect automatically
const types = detectFileType(output);
if (!types.length) {
ext = ".dat";
} else {
ext = `.${types[0].extension.split(",", 1)[0]}`;
}
}
const name = Utils.strToByteArray(iNum + ext);
zip.addFile(output, {filename: name});
}
const zippedFile = zip.compress();
self.postMessage({
zippedFile: zippedFile.buffer,
filename: filename
}, [zippedFile.buffer]);
};