Quickly generate presigned url for all files in a particular AWS S3 bucket location

config.json

{
  "Region": "TOCHANGE",
  "Bucket": "tochange",
  "Location": "to/change/"
}

secrets.json

{
  "AccessKeyId": "TOCHANGE",
  "SecretAccessKey": "TOCHANGE"
}

shareS3files.rb

#!/usr/bin/env ruby

require 'aws-sdk'
require 'json'

#loading credentials
creds = JSON.load(File.read('secrets.json'))
creds = Aws::Credentials.new(creds['AccessKeyId'], creds['SecretAccessKey'])

#loading config
conf = JSON.load(File.read('config.json'))

# Create a new S3 object
s3 = Aws::S3::Client.new(credentials: creds, region: conf['Region'])

# Create a resource object, simpler to use
resource = Aws::S3::Resource.new(client: s3)
bucket = resource.bucket(conf['Bucket'])

# enumerate every object in a bucket, and create a pre signed url with a 5 days expiration limit
bucket.objects(prefix: 'conf['Location']').each do |obj|
  puts "#{obj.key} => #{obj.object.presigned_url(:get, expires_in: 5 * 24 * 60 * 60)}"
end