Check if file exists in S3 bucket with Ruby aws-sdk gem

verify_s3_file.rb

require 'aws-sdk'
  
s3 = Aws::S3::Resource.new(
  region: 'us-east-1',
  credentials: Aws::InstanceProfileCredentials.new()
)
bucket =  s3.bucket('my-daily-backups')

file = (DateTime.now).strftime("%Y.%m.%d-backup")
if bucket.object(file).exists?
  puts "File '/my-daily-backups/#{file}' is present in S3 bucket!"
else
  puts "File '/my-daily-backups/#{file}' is not in S3 bucket!"
end

If you don't ahve permission on the object that are you checking, the result it'll be false every time. So it's not an helpful script.

collect=bucket.objects(prefix: _object).collect(&:key)
      p collect
      collect.each do |item|
        if(item==_object)
          return render json: true
        end
      end
return render json: false
`

Thanks, it's helpful for me!

Life saver! Thank you!