Class: AWS::S3::Bucket

Inherits:
Object
  • Object
show all
Defined in:
lib/aws/s3/bucket.rb

Overview

Represents a single S3 bucket.

Examples:

Creating a Bucket


bucket = s3.buckets.create('mybucket')

Getting an Existing Bucket


bucket = s3.buckets['mybucket']

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, options = {}) ⇒ Bucket

Returns a new instance of Bucket.

Options Hash (options):

  • :owner (String) — default: nil —

    The owner id of this bucket.



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# File 'lib/aws/s3/bucket.rb', line 35

def initialize(name, options = {})
  # the S3 docs disagree with what the service allows,
  # so it's not safe to toss out invalid bucket names
  # S3::Client.validate_bucket_name!(name)
  @name = name
  @owner = options[:owner]
  super
end

Instance Attribute Details

#name ⇒ String (readonly) 



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# File 'lib/aws/s3/bucket.rb', line 45

def name
  @name
end

Instance Method Details

#==(other) ⇒ Boolean 



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# File 'lib/aws/s3/bucket.rb', line 138

def ==(other)
  other.kind_of?(Bucket) && other.name == name
end

#acl ⇒ AccessControlList

Returns the bucket’s access control list. This will be an instance of AccessControlList, plus an additional change method:

bucket.acl.change do |acl|
  acl.grants.reject! do |g|
    g.grantee.canonical_user_id != bucket.owner.id
  end
end



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# File 'lib/aws/s3/bucket.rb', line 205

def acl

  resp = client.get_bucket_acl(:bucket_name => name)

  acl = AccessControlList.new(resp.data)
  acl.extend ACLProxy
  acl.bucket = self
  acl

end

#acl=(acl) ⇒ nil

Sets the bucket’s ACL (access control list). You can provide an ACL in a number of different formats.



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# File 'lib/aws/s3/bucket.rb', line 220

def acl= acl
  client.set_bucket_acl(acl_options(acl).merge(:bucket_name => name))
  nil
end

#as_tree(options = {}) ⇒ Tree

Returns a tree that allows you to expose the bucket contents like a directory structure.

Options Hash (options):

  • :prefix (String) — default: nil —

    Set prefix to choose where the top of the tree will be. A value of nil means that the tree will include all objects in the collection.

  • :delimiter (String) — default: '/' —

    The string that separates each level of the tree. This is usually a directory separator.

  • :append (Boolean) — default: true —

    If true, the delimiter is appended to the prefix when the prefix does not already end with the delimiter.

See Also:



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# File 'lib/aws/s3/bucket.rb', line 373

def as_tree options = {}
  objects.as_tree(options)
end

#clear! ⇒ nil

Deletes all objects from this bucket.



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# File 'lib/aws/s3/bucket.rb', line 106

def clear!
  versions.each_batch do |versions|
    objects.delete(versions)
  end
end

#delete ⇒ nil

Deletes the current bucket. An error will be raised if the bucket is not empty.



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# File 'lib/aws/s3/bucket.rb', line 115

def delete
  client.delete_bucket(:bucket_name => @name)
  nil
end

#delete! ⇒ nil

Deletes all objects in a bucket and then deletes the bucket.



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# File 'lib/aws/s3/bucket.rb', line 122

def delete!
  clear!
  delete
end

#empty? ⇒ Boolean 



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# File 'lib/aws/s3/bucket.rb', line 59

def empty?
  versions.first ? false : true
end

#enable_versioning ⇒ nil

Enables versioning on this bucket.



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# File 'lib/aws/s3/bucket.rb', line 71

def enable_versioning
  client.set_bucket_versioning(
    :bucket_name => @name,
    :state => :enabled)
  nil
end

#eql?(other_bucket) ⇒ Boolean 



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# File 'lib/aws/s3/bucket.rb', line 143

def eql?(other_bucket)
  self == other_bucket
end

#exists? ⇒ Boolean

Note:

This method only indicates if there is a bucket in S3, not if you have permissions to work with the bucket or not.

Returns true if the bucket exists in S3.



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# File 'lib/aws/s3/bucket.rb', line 150

def exists?
  begin
    versioned? # makes a get bucket request without listing contents
               # raises a client error if the bucket doesn't exist or
               # if you don't have permission to get the bucket 
               # versioning status.
    true
  rescue Errors::NoSuchBucket => e
    false # bucket does not exist
  rescue Errors::ClientError => e
    true # bucket exists
  end
end

#lifecycle_configuration ⇒ BucketLifecycleConfiguration

The primary interface for editing the lifecycle configuration. See AWS::S3::BucketLifecycleConfiguration for more information.

Examples:

Adding rules to a bucket’s lifecycle configuration


bucket.lifecycle_configuration.update do
  add_rule 'cache-1/', 30
  add_rule 'cache-2/', 30
end

Deleting the lifecycle configuration


bucket.lifecycle_configuration.clear



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# File 'lib/aws/s3/bucket.rb', line 302

def lifecycle_configuration
  @lifecycle_cfg ||= BucketLifecycleConfiguration.new(self)
end

#lifecycle_configuration=(config) ⇒ nil

You can call this method if you prefer to build your own lifecycle configuration.

bucket.lifecycle_configuration = "  <LifecycleConfiguration>\n    ...\n  </LifecycleConfiguration>\n"

You can also use this method to copy a lifecycle configuration from another bucket.

bucket.lifecycle_configuration = other_bucket.lifecycle_configuration

If you call this method, passing nil, the lifecycle configuration for this bucket will be deleted.



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# File 'lib/aws/s3/bucket.rb', line 329

def lifecycle_configuration= config

  if config.nil?

    client_opts = {}
    client_opts[:bucket_name] = name
    client.delete_bucket_lifecycle_configuration(client_opts)

    @lifecycle_cfg = BucketLifecycleConfiguration.new(self, :empty => true)

  else
  
    xml = config.is_a?(String) ? config : config.to_xml

    client_opts = {}
    client_opts[:bucket_name] = name
    client_opts[:lifecycle_configuration] = xml
    client.set_bucket_lifecycle_configuration(client_opts)

    @lifecycle_cfg = BucketLifecycleConfiguration.new(self, :xml => xml)

  end

  nil

end

#location_constraint ⇒ String? 



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# File 'lib/aws/s3/bucket.rb', line 65

def location_constraint
  client.get_bucket_location(:bucket_name => name).location_constraint
end

#multipart_uploads ⇒ MultipartUploadCollection 



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# File 'lib/aws/s3/bucket.rb', line 178

def multipart_uploads
  MultipartUploadCollection.new(self)
end

#objects ⇒ ObjectCollection 



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# File 'lib/aws/s3/bucket.rb', line 166

def objects
  ObjectCollection.new(self)
end

#owner ⇒ String 



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# File 'lib/aws/s3/bucket.rb', line 128

def owner
  @owner || client.list_buckets.owner
end

#policy ⇒ Policy?

Returns the bucket policy. This will be an instance of Policy. The returned policy will also have the methods of PolicyProxy mixed in, so you can use it to change the current policy or delete it, for example:

if policy = bucket.policy
  # add a statement
  policy.change do |p|
    p.allow(...)
  end

  # delete the policy
  policy.delete
end

Note that changing the policy is not an atomic operation; it fetches the current policy, yields it to the block, and then sets it again. Therefore, it’s possible that you may overwrite a concurrent update to the policy using this method.



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# File 'lib/aws/s3/bucket.rb', line 264

def policy
  resp = client.get_bucket_policy(:bucket_name => name)
  policy = Policy.from_json(resp.data[:policy])
  policy.extend(PolicyProxy)
  policy.bucket = self
  policy
rescue Errors::NoSuchBucketPolicy => e
  nil
end

#policy=(policy) ⇒ nil

Sets the bucket’s policy.

See Also:



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# File 'lib/aws/s3/bucket.rb', line 281

def policy=(policy)
  client.set_bucket_policy(:bucket_name => name, :policy => policy)
  nil
end

#presigned_post(options = {}) ⇒ Object

Generates fields for a presigned POST to this object. All options are sent to the PresignedPost constructor.

See Also:



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# File 'lib/aws/s3/bucket.rb', line 381

def presigned_post(options = {})
  PresignedPost.new(self, options)
end

#suspend_versioning ⇒ nil

Suspends versioning on this bucket.



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# File 'lib/aws/s3/bucket.rb', line 80

def suspend_versioning
  client.set_bucket_versioning(
    :bucket_name => @name,
    :state => :suspended)
  nil
end

#url ⇒ String

Returns the url for this bucket.



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# File 'lib/aws/s3/bucket.rb', line 49

def url
  if client.dns_compatible_bucket_name?(name)
    "http://#{name}.s3.amazonaws.com/"
  else
    "http://s3.amazonaws.com/#{name}/"
  end
end

#versioning_enabled? ⇒ Boolean Also known as: versioned? 



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# File 'lib/aws/s3/bucket.rb', line 88

def versioning_enabled?
  versioning_state == :enabled
end

#versioning_state ⇒ Symbol

Returns the versioning status for this bucket. States include:

  • :enabled - currently enabled

  • :suspended - currently suspended

  • :unversioned - versioning has never been enabled



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# File 'lib/aws/s3/bucket.rb', line 100

def versioning_state
  client.get_bucket_versioning(:bucket_name => @name).status
end

#versions ⇒ BucketVersionCollection 



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# File 'lib/aws/s3/bucket.rb', line 172

def versions
  BucketVersionCollection.new(self)
end