Upload a file to Amazon S3

upload_to_s3.rb

# assumption
# Following Environment variables are already set
# AWS_SECRET_ACCESS_KEY, AWS_REGION
# Alternative way is mentioned https://github.com/aws/aws-sdk-ruby#configuration-options

file_name = 'sample.xml'
upload_file = '/path/to/sample.xml'

# Create an instance of the Aws::S3::Resource class
s3 = Aws::S3::Resource.new
# Reference the target object by bucket name and key.
# Objects live in a bucket and have unique keys that identify the object.
obj = s3.bucket('your-bucket-name').object(file_name)
obj.upload_file(upload_file, { acl: 'public-read' })  # http://docs.aws.amazon.com/AmazonS3/latest/dev/acl-overview.html

# Returns Public URL to the file
obj.public_url

# Reference http://docs.aws.amazon.com/AmazonS3/latest/dev/UploadObjSingleOpRuby.html