f04e476a6e
feat(SW-3240): Move StaticMap to design-system * Move StaticMap to design-system Approved-by: Joakim Jäderberg
65 lines
1.8 KiB
TypeScript
65 lines
1.8 KiB
TypeScript
import crypto from 'node:crypto'
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/**
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* Util functions taken from https://developers.google.com/maps/documentation/maps-static/digital-signature#sample-code-for-url-signing
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* Used to sign the URL for the Google Static Maps API.
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*/
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/**
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* Convert from 'web safe' base64 to true base64.
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*
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* @param {string} safeEncodedString The code you want to translate
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* from a web safe form.
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* @return {string}
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*/
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function removeWebSafe(safeEncodedString: string) {
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return safeEncodedString.replace(/-/g, '+').replace(/_/g, '/')
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}
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/**
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* Convert from true base64 to 'web safe' base64
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*
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* @param {string} encodedString The code you want to translate to a
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* web safe form.
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* @return {string}
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*/
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function makeWebSafe(encodedString: string) {
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return encodedString.replace(/\+/g, '-').replace(/\//g, '_')
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}
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/**
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* Takes a base64 code and decodes it.
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*
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* @param {string} code The encoded data.
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* @return {string}
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*/
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function decodeBase64Hash(code: string) {
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return Buffer.from(code, 'base64')
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}
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/**
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* Takes a key and signs the data with it.
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*
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* @param {string} key Your unique secret key.
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* @param {string} data The url to sign.
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* @return {string}
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*/
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function encodeBase64Hash(key: Buffer, data: string) {
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return crypto.createHmac('sha1', key).update(data).digest('base64')
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}
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/**
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* Sign a URL using a secret key.
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*
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* @param {URL} url The url you want to sign.
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* @param {string} secret Your unique secret key.
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* @return {string}
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*/
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export function getUrlWithSignature(url: URL, secret = '') {
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const path = url.pathname + url.search
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const safeSecret = decodeBase64Hash(removeWebSafe(secret))
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const hashedSignature = makeWebSafe(encodeBase64Hash(safeSecret, path))
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return `${url.toString()}&signature=${hashedSignature}`
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}
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