Ruby AWS::SDK Examples (aws-sdk-v1 gem)
This article uses the new DreamObjects cluster of 'objects-us-east-1.dream.io'. If you have an older DreamObjects account and have not migrated your data yet, your hostname may need to point to 'objects-us-west-1.dream.io' instead. Please review the following migration article for further details.
Creating a Connection
Create a connection so you can interact with DreamObjects.
AWS.config(
:s3_endpoint => 'objects-us-east-1.dream.io',
:access_key_id => 'my-access-key',
:secret_access_key => 'my-secret-key'
)
Instantiate a client object.
s3 = AWS::S3.new
Listing Owned Buckets
Get a list of Buckets you own and print the name.
s3.buckets.each do |bucket|
puts bucket.name
end
The output will look something like this:
mahbuckat1 mahbuckat2 mahbuckat3
Creating a Bucket
Create a new bucket called my-new-bucket.
s3.buckets.create('my-new-bucket')
Listing a Bucket’s Content
Get 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.
new_bucket = s3.buckets['my-new-bucket']
new_bucket.objects.each do |obj|
puts "#{obj.key}\t#{obj.content_length}\t#{obj.last_modified}"
end
The output will look something like this if the bucket has some files:
myphoto1.jpg 251262 2011-08-08 21:35:48 -0400 myphoto2.jpg 262518 2011-08-08 21:38:01 -0400
Deleting a Bucket
The Bucket must be empty, otherwise it won’t work.
bucket = s3.buckets['my-new-bucket'] bucket.delete
Forced Delete for Non-empty Buckets
bucket = s3.buckets['my-new-bucket'] bucket.delete!
Creating an Object
Create a file hello.txt with the string "Hello World!"
bucket = s3.buckets['my-new-bucket']
obj = bucket.objects.create(
'hello.txt',
'Hello World!',
)
Upload a file test.txt, set the content-type, and make it publicly readable.
obj = s3.buckets['my-new-bucket'].objects['test.txt']
obj.write(File.open('path/to/test.txt', 'rb')
:content_type => 'text/plain',
:acl => 'public_read',
)
Change an Object’s ACL
Make the object hello.txt publicly readable and secret_plans.txt to be private.
bucket = s3.buckets['my-new-bucket'] bucket.objects['hello.txt'].acl = :public_read bucket.objects['secret_plans.txt'].acl = :private
Download an Object (to a file)
Download the object poetry.pdf and save it in /home/larry/documents/.
bucket = s3.buckets['my-new-bucket']
File.open('/home/larry/documents/poetry.pdf', 'w') do |file|
bucket.objects['poetry.pdf'].read do |chunk|
file.write(chunk)
end
end
Delete an Object
Delete the object goodbye.txt.
bucket = s3.buckets['my-new-bucket']
bucket.objects.delete('goodbye.txt')
Generate Object Download URLs (signed and unsigned)
This generates an unsigned download URL for hello.txt. This works because hello.txt was made 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).
puts s3.buckets['my-new-bucket'].objects['hello.txt'].public_url
puts s3.buckets['my-new-bucket'].objects['secret_plans.txt'].url_for(
:read,
:expires => 60 * 60
)
The output of this will look something like:
http://objects-us-east-1.dream.io/my-bucket-name/hello.txt http://objects-us-east-1.dream.io/my-bucket-name/secret_plans.txt?Signature=XXXXXXXXXXXXXXXXXXXXXXXXXXX&Expires=1316027075&AWSAccessKeyId=XXXXXXXXXXXXXXXXXXX
Ruby AWS::S3 Examples (aws-s3 gem)
Creating a Connection
Create a connection so you can interact with the server.
AWS::S3::Base.establish_connection!(
:server => 'objects-us-east-1.dream.io',
:use_ssl => true,
:access_key_id => 'my-access-key',
:secret_access_key => 'my-secret-key'
)
Listing Owned Buckets
Get a list of AWS::S3::Bucket objects you own. This also prints out the bucket name and creation date of each bucket.
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
Create a new bucket called my-new-bucket.
AWS::S3::Bucket.create('my-new-bucket')
Listing a Bucket’s Content
Get 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.
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
The Bucket must be empty, otherwise it won’t work.
AWS::S3::Bucket.delete('my-new-bucket')
Forced Delete for Non-empty Buckets
AWS::S3::Bucket.delete('my-new-bucket', :force => true)
Creating an Object
Create a file hello.txt with the string "Hello World!"
AWS::S3::S3Object.store(
'hello.txt',
'Hello World!',
'my-new-bucket',
:content_type => 'text/plain'
)
Change an Object’s ACL
Make the object hello.txt publicly readable and secret_plans.txt to be private.
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)
Download the object poetry.pdf and saves it in /home/larry/documents/.
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
Delete the object goodbye.txt.
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 hello.txt was made 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).
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-us-east-1.dream.io/my-bucket-name/hello.txt http://objects-us-east-1.dream.io/my-bucket-name/secret_plans.txt?Signature=XXXXXXXXXXXXXXXXXXXXXXXXXXX&Expires=1316027075&AWSAccessKeyId=XXXXXXXXXXXXXXXXXXX
