Download xlsx from S3 and parse it

Question

I need a service to download an excel file from Amazon S3, then parse with node-xlsx

The problem is that I can\'t get xlsx to parse the file. When I try to read back

Answer 1

fs.writeFile is asynchronous. The file won't be there till the call back is called.

https://nodejs.org/api/fs.html#fs_fs_writefile_file_data_options_callback

fs.writeFile('message.txt', 'Hello Node.js', (err) => {
  if (err) throw err;
  console.log('It\'s saved!');
});