mirror of
https://github.com/gchq/CyberChef
synced 2026-01-01 16:13:46 +00:00
c0c83c5cdc
Allow selecting multiple files. Allow drag and dropping multiple files. Clear all IO button will close all tabs. Will now spawn multiple loaderworkers simultaneously. Improve tab logic to break less and work in Firefox.
58 lines
1.5 KiB
JavaScript
Executable File
58 lines
1.5 KiB
JavaScript
Executable File
/**
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* Web Worker to load large amounts of data without locking up the UI.
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*
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2017
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* @license Apache-2.0
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*/
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/**
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* Respond to message from parent thread.
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*/
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self.addEventListener("message", function(e) {
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const r = e.data;
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if (r.hasOwnProperty("file") && (r.hasOwnProperty("inputNum"))) {
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self.loadFile(r.file, r.inputNum);
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} else if (r.hasOwnProperty("file")) {
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self.loadFile(r.file, "");
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}
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});
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/**
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* Loads a file object into an ArrayBuffer, then transfers it back to the parent thread.
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*
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* @param {File} file
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* @param {string} inputNum
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*/
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self.loadFile = function(file, inputNum) {
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const reader = new FileReader();
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const data = new Uint8Array(file.size);
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let offset = 0;
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const CHUNK_SIZE = 10485760; // 10MiB
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const seek = function() {
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if (offset >= file.size) {
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self.postMessage({"progress": 100, "inputNum": inputNum});
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self.postMessage({"fileBuffer": data.buffer, "inputNum": inputNum}, [data.buffer]);
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return;
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}
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self.postMessage({"progress": Math.round(offset / file.size * 100), "inputNum": inputNum});
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const slice = file.slice(offset, offset + CHUNK_SIZE);
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reader.readAsArrayBuffer(slice);
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};
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reader.onload = function(e) {
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data.set(new Uint8Array(reader.result), offset);
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offset += CHUNK_SIZE;
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seek();
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};
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reader.onerror = function(e) {
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self.postMessage({"error": reader.error.message});
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};
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seek();
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};
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