Switchless TEST

Download file

  • keywords: #pattern
  • author: #alex

Install sails hook upload

npm install sails-hook-uploads --save

Controller code

// something that generated the file
var time = new Date().getTime();
var out = XLSX.writeFile(wb, 'out_'+req.user.id+'_'+time+'.xls');

// the act of downloading the file. 
var downloading = await sails.startDownload('out_'+req.user.id+'_'+time+'.xls');

Timestamp is added to the filename so as to avoid race conditions between 2 requests trying to download a file simultaniously. Timestamps are likely to be more unique. Avoid race conditions further by appending user id to the file name as well.

In production.js, explicitly set the adapter

You will need to specify which adapter to use explicity in production.js. Else it will error out when lifting the server in production mode.


If you are uploading files to S3, then you will need to use skipper-s3 instead. Ref to Upload a file.


  • https://sailsjs.com/documentation/reference/response-res/res-attachment
  • https://github.com/sailshq/skipper#use-cases