从谷歌云存储下载 excel 文件返回一个缓冲区，我怎样才能返回实际的 excel 文件，以便我可以在我的处理程序中写入它？

Question

I'm trying to retrieve an excel file from my bucket using the Firebase Admin SDK using the following code:

export const getTemplate = async (fileName: string) => {
  const filePath = admin
    .storage()
    .bucket()
    .file('sheets/template.xlsx')

  const [file] = await filePath.download()
  return file
}

I then pass what's returned from this function, to this function:

export const writeToTemplate = (
  objects: any[],
  sheetNames: string[],
  file
) => {

  objects.forEach((dataObject, index) => {
    const sheetName = sheetNames[index]
    const worksheet = templateFile.Sheets[sheetName]
    utils.sheet_add_json(worksheet, dataObject)
  })
  return file
}

However this throws an error that it cannot read my file. When I console log the file it shows a buffer

<Buffer 50 4b 03 04 14 00 06 00 08 00.........>

How can I actually write to the file? Cheers:)

Answer 1

I needed to read the Buffer with the read function from the 'xlsx' package!