ceph/doc/radosgw/s3/ruby.rst

.. _ruby:

Ruby S3 Examples (aws-sdk gem ~>2)
==================================

Settings
---------------------

You can setup the connection on global way:

.. code-block:: ruby

	Aws.config.update(
		endpoint: 'https://objects.dreamhost.com.',
		access_key_id: 'my-access-key',
		secret_access_key: 'my-secret-key',
		force_path_style: true, 
		region: 'us-east-1'
	)


and instantiate a client object:

.. code-block:: ruby

    	s3_client = Aws::S3::Client.new

Listing Owned Buckets
---------------------

This gets a list of buckets that you own.
This also prints out the bucket name and creation date of each bucket.

.. code-block:: ruby

	s3_client.list_buckets.buckets.each do |bucket|
		puts "#{bucket.name}\t#{bucket.creation_date}"
	end

The output will look something like this::

   mahbuckat1	2011-04-21T18:05:39.000Z
   mahbuckat2	2011-04-21T18:05:48.000Z
   mahbuckat3	2011-04-21T18:07:18.000Z


Creating a Bucket
-----------------

This creates a new bucket called ``my-new-bucket``

.. code-block:: ruby

	s3_client.create_bucket(bucket: 'my-new-bucket')

If you want a private bucket: 

`acl` option accepts: # private, public-read, public-read-write, authenticated-read

.. code-block:: ruby

	s3_client.create_bucket(bucket: 'my-new-bucket', acl: 'private')


Listing a Bucket's Content
--------------------------

This gets a list of hashes with the contents of each object
This also prints out each object's name, the file size, and last
modified date.

.. code-block:: ruby

	s3_client.get_objects(bucket: 'my-new-bucket').contents.each do |object|
		puts "#{object.key}\t#{object.size}\t#{object.last-modified}"
	end

The output will look something like this if the bucket has some files::

   myphoto1.jpg	251262	2011-08-08T21:35:48.000Z
   myphoto2.jpg	262518	2011-08-08T21:38:01.000Z


Deleting a Bucket
-----------------
.. note::
   The Bucket must be empty! Otherwise it won't work!

.. code-block:: ruby

	s3_client.delete_bucket(bucket: 'my-new-bucket')


Forced Delete for Non-empty Buckets
-----------------------------------
First, you need to clear the bucket:

.. code-block:: ruby

	Aws::S3::Bucket.new('my-new-bucket', client: s3_client).clear!
	
after, you can destroy the bucket

.. code-block:: ruby

	s3_client.delete_bucket(bucket: 'my-new-bucket')


Creating an Object
------------------

This creates a file ``hello.txt`` with the string ``"Hello World!"``

.. code-block:: ruby

	s3_client.put_object(
		key: 'hello.txt',
		body: 'Hello World!',
		bucket: 'my-new-bucket',
		content_type: 'text/plain'
	)


Change an Object's ACL
----------------------

This makes the object ``hello.txt`` to be publicly readable, and ``secret_plans.txt``
to be private.

.. code-block:: ruby

	s3_client.put_object_acl(bucket: 'my-new-bucket', key: 'hello.txt', acl: 'public-read')

	s3_client.put_object_acl(bucket: 'my-new-bucket', key: 'private.txt', acl: 'private')


Download an Object (to a file)
------------------------------

This downloads the object ``poetry.pdf`` and saves it in
``/home/larry/documents/``

.. code-block:: ruby
	s3_client.get_object(bucket: 'my-new-bucket', key: 'poetry.pdf', response_target: '/home/larry/documents/poetry.pdf')


Delete an Object
----------------

This deletes the object ``goodbye.txt``

.. code-block:: ruby

	s3_client.delete_object(key: 'goodbye.txt', bucket: 'my-new-bucket')


Generate Object Download URLs (signed and unsigned)
---------------------------------------------------

This generates an unsigned download URL for ``hello.txt``. This works
because we made ``hello.txt`` public by setting the ACL above.
This then generates a signed download URL for ``secret_plans.txt`` that
will work for 1 hour. Signed download URLs will work for the time
period even if the object is private (when the time period is up, the
URL will stop working).

.. code-block:: ruby

	puts Aws::S3::Object.new(
		key: 'hello.txt',
		bucket_name: 'my-new-bucket',
		client: s3_client
	).public_url

	puts Aws::S3::Object.new(
		key: 'secret_plans.txt',
		bucket_name: 'hermes_ceph_gem',
		client: s3_client
	).presigned_url(:get, expires_in: 60 * 60)

The output of this will look something like::

   http://objects.dreamhost.com/my-bucket-name/hello.txt
   http://objects.dreamhost.com/my-bucket-name/secret_plans.txt?Signature=XXXXXXXXXXXXXXXXXXXXXXXXXXX&Expires=1316027075&AWSAccessKeyId=XXXXXXXXXXXXXXXXXXX

.. _`Aws::S3`: http://docs.aws.amazon.com/sdkforruby/api/Aws/S3/Client.html



Ruby S3 Examples (aws-s3 gem)
=============================

Creating a Connection
---------------------

This creates a connection so that you can interact with the server.

.. code-block:: ruby

	AWS::S3::Base.establish_connection!(
		:server            => 'objects.dreamhost.com',
		:use_ssl           => true,
		:access_key_id     => 'my-access-key',
		:secret_access_key => 'my-secret-key'
	)


Listing Owned Buckets
---------------------

This gets a list of `AWS::S3::Bucket`_ objects that you own.
This also prints out the bucket name and creation date of each bucket.

.. code-block:: ruby

	AWS::S3::Service.buckets.each do |bucket|
		puts "#{bucket.name}\t#{bucket.creation_date}"
	end

The output will look something like this::

   mahbuckat1	2011-04-21T18:05:39.000Z
   mahbuckat2	2011-04-21T18:05:48.000Z
   mahbuckat3	2011-04-21T18:07:18.000Z


Creating a Bucket
-----------------

This creates a new bucket called ``my-new-bucket``

.. code-block:: ruby

	AWS::S3::Bucket.create('my-new-bucket')


Listing a Bucket's Content
--------------------------

This gets a list of hashes with the contents of each object
This also prints out each object's name, the file size, and last
modified date.

.. code-block:: ruby

	new_bucket = AWS::S3::Bucket.find('my-new-bucket')
	new_bucket.each do |object|
		puts "#{object.key}\t#{object.about['content-length']}\t#{object.about['last-modified']}"
	end

The output will look something like this if the bucket has some files::

   myphoto1.jpg	251262	2011-08-08T21:35:48.000Z
   myphoto2.jpg	262518	2011-08-08T21:38:01.000Z


Deleting a Bucket
-----------------
.. note::
   The Bucket must be empty! Otherwise it won't work!

.. code-block:: ruby

	AWS::S3::Bucket.delete('my-new-bucket')


Forced Delete for Non-empty Buckets
-----------------------------------

.. code-block:: ruby

	AWS::S3::Bucket.delete('my-new-bucket', :force => true)


Creating an Object
------------------

This creates a file ``hello.txt`` with the string ``"Hello World!"``

.. code-block:: ruby

	AWS::S3::S3Object.store(
		'hello.txt',
		'Hello World!',
		'my-new-bucket',
		:content_type => 'text/plain'
	)


Change an Object's ACL
----------------------

This makes the object ``hello.txt`` to be publicly readable, and ``secret_plans.txt``
to be private.

.. code-block:: ruby

	policy = AWS::S3::S3Object.acl('hello.txt', 'my-new-bucket')
	policy.grants = [ AWS::S3::ACL::Grant.grant(:public_read) ]
	AWS::S3::S3Object.acl('hello.txt', 'my-new-bucket', policy)

	policy = AWS::S3::S3Object.acl('secret_plans.txt', 'my-new-bucket')
	policy.grants = []
	AWS::S3::S3Object.acl('secret_plans.txt', 'my-new-bucket', policy)


Download an Object (to a file)
------------------------------

This downloads the object ``poetry.pdf`` and saves it in
``/home/larry/documents/``

.. code-block:: ruby

	open('/home/larry/documents/poetry.pdf', 'w') do |file|
		AWS::S3::S3Object.stream('poetry.pdf', 'my-new-bucket') do |chunk|
			file.write(chunk)
		end
	end


Delete an Object
----------------

This deletes the object ``goodbye.txt``

.. code-block:: ruby

	AWS::S3::S3Object.delete('goodbye.txt', 'my-new-bucket')


Generate Object Download URLs (signed and unsigned)
---------------------------------------------------

This generates an unsigned download URL for ``hello.txt``. This works
because we made ``hello.txt`` public by setting the ACL above.
This then generates a signed download URL for ``secret_plans.txt`` that
will work for 1 hour. Signed download URLs will work for the time
period even if the object is private (when the time period is up, the
URL will stop working).

.. code-block:: ruby

	puts AWS::S3::S3Object.url_for(
		'hello.txt',
		'my-new-bucket',
		:authenticated => false
	)

	puts AWS::S3::S3Object.url_for(
		'secret_plans.txt',
		'my-new-bucket',
		:expires_in => 60 * 60
	)

The output of this will look something like::

   http://objects.dreamhost.com/my-bucket-name/hello.txt
   http://objects.dreamhost.com/my-bucket-name/secret_plans.txt?Signature=XXXXXXXXXXXXXXXXXXXXXXXXXXX&Expires=1316027075&AWSAccessKeyId=XXXXXXXXXXXXXXXXXXX

.. _`AWS::S3`: http://amazon.rubyforge.org/
.. _`AWS::S3::Bucket`: http://amazon.rubyforge.org/doc/