import { Buffer } from "https://deno.land/std@0.164.0/node/buffer.ts"; export const encodeBase64 = (str: string): string => { if (str === null) { throw new TypeError('1st argument of "encodeBase64" should not be null.') } try { const encoder = new TextEncoder() const bytes = encoder.encode(str) return btoa(String.fromCharCode(...bytes)) } catch {} try { return Buffer.from(str).toString('base64') } catch (e) { console.error('If you want to do "encodeBase64", polyfill "buffer" module.') throw e } } export const decodeBase64 = (str: string): string => { if (str === null) { throw new TypeError('1st argument of "decodeBase64" should not be null.') } try { const text = atob(str) const bytes = new Uint8Array(text.split('').map((c) => c.charCodeAt(0))) const decoder = new TextDecoder() return decoder.decode(bytes) } catch {} try { return Buffer.from(str, 'base64').toString() } catch (e) { console.error('If you want to do "decodeBase64", polyfill "buffer" module.') throw e } } export const encodeBase64URL = (str: string): string => { return encodeBase64(str).replace(/=/g, '').replace(/\+/g, '-').replace(/\//g, '_') } export const decodeBase64URL = (str: string): string => { const pad = (s: string) => { const diff = s.length % 4 if (diff === 2) { return `${s}==` } if (diff === 3) { return `${s}=` } return s } return decodeBase64(pad(str).replace(/-/g, '+').replace('_', '/')) } export const utf8ToUint8Array = (str: string): Uint8Array => { const encoder = new TextEncoder() return encoder.encode(str) } export const arrayBufferToBase64 = async (buf: ArrayBuffer): Promise => { if (typeof btoa === 'function') { return btoa(String.fromCharCode(...new Uint8Array(buf))) } try { return Buffer.from(String.fromCharCode(...new Uint8Array(buf))).toString('base64') } catch (e) {} return '' } export const arrayBufferToBase64URL = async (buf: ArrayBuffer) => { return (await arrayBufferToBase64(buf)).replace(/=/g, '').replace(/\+/g, '-').replace(/\//g, '_') }