Class: AWS::S3::Bucket

Inherits:
Object
  • Object
show all
Includes:
Core::Model
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']

Defined Under Namespace

Modules: ACLProxy, PolicyProxy

Instance Attribute Summary collapse

Attributes included from Core::Model

#config

Instance Method Summary collapse

Methods included from Core::Model

#client, #config_prefix

Constructor Details

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

Returns a new instance of Bucket.

Parameters:

  • name (String)
  • options (Hash) (defaults to: {})

Options Hash (options):

  • :owner (String) — default: nil

    The owner id of this bucket.


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# File 'lib/aws/s3/bucket.rb', line 34

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

#nameString (readonly)

Returns The bucket name.

Returns:

  • (String)

    The bucket name


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# File 'lib/aws/s3/bucket.rb', line 44

def name
  @name
end

Instance Method Details

#==(other) ⇒ Boolean

Returns true if the two buckets have the same name.

Returns:

  • (Boolean)

    Returns true if the two buckets have the same name.


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# File 'lib/aws/s3/bucket.rb', line 137

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

#aclAccessControlList

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

Returns:


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# File 'lib/aws/s3/bucket.rb', line 204

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 access control list. acl can be:

  • An XML policy as a string (which is passed to S3 uninterpreted)

  • An AccessControlList object

  • Any object that responds to to_xml

  • Any Hash that is acceptable as an argument to AccessControlList#initialize.

Parameters:

Returns:

  • (nil)

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# File 'lib/aws/s3/bucket.rb', line 225

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

#as_tree(options = {}) ⇒ Tree

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

Parameters:

  • options (Hash) (defaults to: {})

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.

Returns:

See Also:


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# File 'lib/aws/s3/bucket.rb', line 378

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

#clear!nil

Deletes all objects from this bucket.

Returns:

  • (nil)

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# File 'lib/aws/s3/bucket.rb', line 105

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

#deletenil

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

Returns:

  • (nil)

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# File 'lib/aws/s3/bucket.rb', line 114

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

#delete!nil

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

Returns:

  • (nil)

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# File 'lib/aws/s3/bucket.rb', line 121

def delete!
  clear!
  delete
end

#empty?Boolean

Returns true if the bucket has no objects (this includes versioned objects that are delete markers).

Returns:

  • (Boolean)

    Returns true if the bucket has no objects (this includes versioned objects that are delete markers).


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# File 'lib/aws/s3/bucket.rb', line 58

def empty?
  versions.first ? false : true
end

#enable_versioningnil

Enables versioning on this bucket.

Returns:

  • (nil)

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# File 'lib/aws/s3/bucket.rb', line 70

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

#eql?(other_bucket) ⇒ Boolean

Returns true if the two buckets have the same name

Returns:

  • (Boolean)

    Returns true if the two buckets have the same name


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# File 'lib/aws/s3/bucket.rb', line 142

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.

Returns:

  • (Boolean)

    Returns true if the bucket exists in S3.


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# File 'lib/aws/s3/bucket.rb', line 149

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

#inspectObject


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# File 'lib/aws/s3/bucket.rb', line 132

def inspect
  "#<AWS::S3::Bucket:#{name}>"
end

#lifecycle_configurationBucketLifecycleConfiguration

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

Returns:


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# File 'lib/aws/s3/bucket.rb', line 307

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 = <<-XML
  <LifecycleConfiguration>
    ...
  </LifecycleConfiguration>
XML

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.

Parameters:

  • config (String, Object)

    You can pass an xml string or any other object that responds to #to_xml (e.g. BucketLifecycleConfiguration).

Returns:

  • (nil)

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# File 'lib/aws/s3/bucket.rb', line 334

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_constraintString?

Returns the location constraint for a bucket (if it has one), nil otherwise.

Returns:

  • (String, nil)

    Returns the location constraint for a bucket (if it has one), nil otherwise.


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# File 'lib/aws/s3/bucket.rb', line 64

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

#multipart_uploadsMultipartUploadCollection

Returns Represents all of the multipart uploads that are in progress for this bucket.

Returns:


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# File 'lib/aws/s3/bucket.rb', line 177

def multipart_uploads
  MultipartUploadCollection.new(self)
end

#objectsObjectCollection

Returns Represents all objects(keys) in this bucket.

Returns:


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# File 'lib/aws/s3/bucket.rb', line 165

def objects
  ObjectCollection.new(self)
end

#ownerString

Returns bucket owner id.

Returns:

  • (String)

    bucket owner id


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# File 'lib/aws/s3/bucket.rb', line 127

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

#policyPolicy?

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.

Returns:

  • (Policy, nil)

    Returns the bucket policy (if it has one), or it returns nil otherwise.


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# File 'lib/aws/s3/bucket.rb', line 269

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.

Parameters:

  • policy

    The new policy. This can be a string (which is assumed to contain a valid policy expressed in JSON), a Policy object or any object that responds to to_json.

Returns:

  • (nil)

See Also:


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# File 'lib/aws/s3/bucket.rb', line 286

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:

  • PresignedPost

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# File 'lib/aws/s3/bucket.rb', line 386

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

#suspend_versioningnil

Suspends versioning on this bucket.

Returns:

  • (nil)

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# File 'lib/aws/s3/bucket.rb', line 79

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

#urlString

Returns the url for this bucket.

Returns:

  • (String)

    url to the bucket


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# File 'lib/aws/s3/bucket.rb', line 48

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?

Returns true if version is enabled on this bucket.

Returns:

  • (Boolean)

    returns true if version is enabled on this bucket.


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# File 'lib/aws/s3/bucket.rb', line 87

def versioning_enabled?
  versioning_state == :enabled
end

#versioning_stateSymbol

Returns the versioning status for this bucket. States include:

  • :enabled - currently enabled

  • :suspended - currently suspended

  • :unversioned - versioning has never been enabled

Returns:

  • (Symbol)

    the versioning state


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# File 'lib/aws/s3/bucket.rb', line 99

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

#versionsBucketVersionCollection

Returns Represents all of the versioned objects stored in this bucket.

Returns:


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# File 'lib/aws/s3/bucket.rb', line 171

def versions
  BucketVersionCollection.new(self)
end