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41 lines
1 KiB
TypeScript
41 lines
1 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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/**
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* Converts given data with base64 encoding
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* @param data input to encode
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*/
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export function encode(data: string | ArrayBuffer): string {
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if (typeof data === "string") {
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return window.btoa(data);
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} else {
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const d = new Uint8Array(data);
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let dataString = "";
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for (let i = 0; i < d.length; ++i) {
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dataString += String.fromCharCode(d[i]);
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}
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return window.btoa(dataString);
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}
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}
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/**
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* Converts given base64 encoded data back to original
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* @param data input to decode
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*/
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export function decode(data: string): ArrayBuffer {
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const binaryString = decodeString(data);
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const binary = new Uint8Array(binaryString.length);
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for (let i = 0; i < binary.length; ++i) {
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binary[i] = binaryString.charCodeAt(i);
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}
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return binary.buffer;
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}
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/**
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* Decodes data assuming the output is in string type
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* @param data input to decode
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*/
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export function decodeString(data: string): string {
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return window.atob(data);
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}
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