AWS SDK for Ruby で S3 を操作する

s3.rb

require 'rubygems'
require 'bundler/setup'
require 'aws-sdk'

# NOTE: require ENV[...]
# export AWS_ACCESS_KEY_ID='...'
# export AWS_SECRET_ACCESS_KEY='...'
# export AWS_REGION='ap-northeast-1'

s3 = AWS::S3.new

# bucketを作成
bucket_name = 'bouzuya2'
s3.buckets.create bucket_name unless s3.buckets[bucket_name].exists?

# そのIAMユーザーから見えるすべてのbucketを表示
s3.buckets.each do |bucket|
  puts bucket.name
end

bucket = s3.buckets[bucket_name]

file_path = 'README.md'
File.open(file_path, 'w') do |f|
  f.write 'Hello, S3!'
end

# bucketにobjectをアップロード
object_name = file_path
object = bucket.objects[object_name]
object.write(file: file_path) unless object.exists?

# 複数ファイル
object_name = file_path + '.bk'
object = bucket.objects[object_name]
object.write(file: file_path) unless object.exists?

# folderもつくれる
object_name = 'dir1/' + file_path
object = bucket.objects[object_name]
object.write(file: file_path) unless object.exists?

# 複数ディレクトリ
object_name = 'dir2/' + file_path
object = bucket.objects[object_name]
object.write(file: file_path) unless object.exists?

# bucketのobject一覧を確認
bucket.objects.each do |object|
  puts object.key
  # puts object.public_url
end

# ファイルを読み取る
object_name = file_path
object = bucket.objects[object_name]
puts object.read

# 大きいファイルを読み取る
object_name = file_path
object = bucket.objects[object_name]
object.read do |chunk|
  puts chunk
end

# ファイルを削除する
bucket.objects.each do |object|
  object.delete
end

# bucketを削除する
bucket.delete