2022-07-02 06:09:45 +00:00
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import { sha256 } from './crypto.ts'
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export const equal = (a: ArrayBuffer, b: ArrayBuffer) => {
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if (a === b) {
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return true
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}
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if (a.byteLength !== b.byteLength) {
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return false
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}
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const va = new DataView(a)
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const vb = new DataView(b)
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let i = va.byteLength
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while (i--) {
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if (va.getUint8(i) !== vb.getUint8(i)) {
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return false
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}
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}
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return true
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}
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export const timingSafeEqual = async (
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a: string | object | boolean,
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b: string | object | boolean,
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hashFunction?: Function
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) => {
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if (!hashFunction) {
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hashFunction = sha256
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}
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2023-01-08 00:05:49 +00:00
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2022-07-02 06:09:45 +00:00
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const sa = await hashFunction(a)
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const sb = await hashFunction(b)
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2023-01-08 00:05:49 +00:00
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if (!sa || !sb) {
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return false
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}
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2022-07-02 06:09:45 +00:00
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return sa === sb && a === b
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}
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export const bufferToString = (buffer: ArrayBuffer): string => {
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if (buffer instanceof ArrayBuffer) {
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const enc = new TextDecoder('utf-8')
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return enc.decode(buffer)
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}
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return buffer
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}
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2023-09-03 05:43:01 +00:00
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const _decodeURIComponent = decodeURIComponent
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export const bufferToFormData = (arrayBuffer: ArrayBuffer, contentType: string) => {
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const decoder = new TextDecoder('utf-8')
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const content = decoder.decode(arrayBuffer)
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const formData = new FormData()
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const boundaryMatch = contentType.match(/boundary=(.+)/)
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const boundary = boundaryMatch ? boundaryMatch[1] : ''
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if (contentType.startsWith('multipart/form-data') && boundary) {
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const parts = content.split('--' + boundary).slice(1, -1)
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for (const part of parts) {
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const [header, body] = part.split('\r\n\r\n')
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const nameMatch = header.match(/name="([^"]+)"/)
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if (nameMatch) {
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const name = nameMatch[1]
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formData.append(name, body.trim())
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}
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}
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} else if (contentType.startsWith('application/x-www-form-urlencoded')) {
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const pairs = content.split('&')
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for (const pair of pairs) {
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const [key, value] = pair.split('=')
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formData.append(_decodeURIComponent(key), _decodeURIComponent(value))
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}
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}
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return formData
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}
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