Function hashBytesForCacheKey

src/cache.ts:437–450

(bytes: ArrayBuffer | ArrayBufferView)

}

function hashBytesForCacheKey(bytes: ArrayBuffer | ArrayBufferView) {
  const buffer = ArrayBuffer.isView(bytes)
    ? Buffer.from(bytes.buffer, bytes.byteOffset, bytes.byteLength)
    : Buffer.from(bytes);
  return {
    byteLength: buffer.byteLength,
    hmacSha256: crypto
      .createHmac('sha256', FETCH_CACHE_SECRET_HMAC_SALT)
      .update(`${FETCH_CACHE_SECRET_HMAC_CONTEXT}:bytes`)
      .update('\0')
      .update(buffer)
      .digest('hex'),
  };
}

function getBodyForFetchCacheKey(body: RequestInit['body'] | ReadableStream | null | undefined) {
  if (body == null) {