Function downloadAndDecrypt

packages/weixin/src/media.ts:58–70

(params: {
  encryptQueryParam: string
  aesKey: string
  cdnBaseUrl: string
})

}

export async function downloadAndDecrypt(params: {
  encryptQueryParam: string
  aesKey: string
  cdnBaseUrl: string
}): Promise<Buffer> {
  const url = buildCdnDownloadUrl(params.encryptQueryParam, params.cdnBaseUrl)
  const response = await fetch(url)
  if (!response.ok) {
    throw new Error(`CDN download failed: HTTP ${response.status}`)
  }
  const ciphertext = Buffer.from(await response.arrayBuffer())
  return decryptAesEcb(ciphertext, parseAesKey(params.aesKey))
}

export interface UploadedFileInfo {
  encryptQueryParam: string