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fog--fog-aws/lib/fog/aws/models/storage/file.rb

321 lines
12 KiB
Ruby

require 'fog/aws/models/storage/versions'
module Fog
module AWS
class Storage
class File < Fog::Model
# @see AWS Object docs http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectOps.html
identity :key, :aliases => 'Key'
attr_writer :body
attribute :cache_control, :aliases => 'Cache-Control'
attribute :content_disposition, :aliases => 'Content-Disposition'
attribute :content_encoding, :aliases => 'Content-Encoding'
attribute :content_length, :aliases => ['Content-Length', 'Size'], :type => :integer
attribute :content_md5, :aliases => 'Content-MD5'
attribute :content_type, :aliases => 'Content-Type'
attribute :etag, :aliases => ['Etag', 'ETag']
attribute :expires, :aliases => 'Expires'
attribute :last_modified, :aliases => ['Last-Modified', 'LastModified']
attribute :metadata
attribute :owner, :aliases => 'Owner'
attribute :storage_class, :aliases => ['x-amz-storage-class', 'StorageClass']
attribute :encryption, :aliases => 'x-amz-server-side-encryption'
attribute :encryption_key, :aliases => 'x-amz-server-side-encryption-customer-key'
attribute :version, :aliases => 'x-amz-version-id'
attribute :kms_key_id, :aliases => 'x-amz-server-side-encryption-aws-kms-key-id'
# @note Chunk size to use for multipart uploads.
# Use small chunk sizes to minimize memory. E.g. 5242880 = 5mb
attr_reader :multipart_chunk_size
def multipart_chunk_size=(mp_chunk_size)
raise ArgumentError.new("minimum multipart_chunk_size is 5242880") if mp_chunk_size < 5242880
@multipart_chunk_size = mp_chunk_size
end
def acl
requires :directory, :key
service.get_object_acl(directory.key, key).body['AccessControlList']
end
# Set file's access control list (ACL).
#
# valid acls: private, public-read, public-read-write, authenticated-read, bucket-owner-read, bucket-owner-full-control
#
# @param [String] new_acl one of valid options
# @return [String] @acl
#
def acl=(new_acl)
valid_acls = ['private', 'public-read', 'public-read-write', 'authenticated-read', 'bucket-owner-read', 'bucket-owner-full-control']
unless valid_acls.include?(new_acl)
raise ArgumentError.new("acl must be one of [#{valid_acls.join(', ')}]")
end
@acl = new_acl
end
# Get file's body if exists, else ''.
#
# @return [File]
#
def body
return attributes[:body] if attributes[:body]
return '' unless last_modified
file = collection.get(identity)
if file
attributes[:body] = file.body
else
attributes[:body] = ''
end
end
# Set body attribute.
#
# @param [File] new_body
# @return [File] attributes[:body]
#
def body=(new_body)
attributes[:body] = new_body
end
# Get the file instance's directory.
#
# @return [Fog::AWS::Storage::Directory]
#
def directory
@directory
end
# Copy object from one bucket to other bucket.
#
# required attributes: directory, key
#
# @param target_directory_key [String]
# @param target_file_key [String]
# @param options [Hash] options for copy_object method
# @return [String] Fog::AWS::Files#head status of directory contents
#
def copy(target_directory_key, target_file_key, options = {})
requires :directory, :key
service.copy_object(directory.key, key, target_directory_key, target_file_key, options)
target_directory = service.directories.new(:key => target_directory_key)
target_directory.files.head(target_file_key)
end
# Destroy file via http DELETE.
#
# required attributes: directory, key
#
# @param options [Hash]
# @option options versionId []
# @return [Boolean] true if successful
#
def destroy(options = {})
requires :directory, :key
attributes[:body] = nil if options['versionId'] == version
service.delete_object(directory.key, key, options)
true
end
remove_method :metadata
def metadata
attributes.reject {|key, value| !(key.to_s =~ /^x-amz-/)}
end
remove_method :metadata=
def metadata=(new_metadata)
merge_attributes(new_metadata)
end
remove_method :owner=
def owner=(new_owner)
if new_owner
attributes[:owner] = {
:display_name => new_owner['DisplayName'] || new_owner[:display_name],
:id => new_owner['ID'] || new_owner[:id]
}
end
end
def public?
acl.any? {|grant| grant['Grantee']['URI'] == 'http://acs.amazonaws.com/groups/global/AllUsers' && grant['Permission'] == 'READ'}
end
# Set Access-Control-List permissions.
#
# valid new_publics: public_read, private
#
# @param [String] new_public
# @return [String] new_public
#
def public=(new_public)
if new_public
@acl = 'public-read'
else
@acl = 'private'
end
new_public
end
# Get publicly accessible url via http GET.
# Checks permissions before creating.
# Defaults to s3 subdomain or compliant bucket name
#
# required attributes: directory, key
#
# @return [String] public url
#
def public_url
requires :directory, :key
if public?
service.request_url(
:bucket_name => directory.key,
:object_name => key
)
else
nil
end
end
# Save file with body as contents to directory.key with name key via http PUT
#
# required attributes: body, directory, key
#
# @param [Hash] options
# @option options [String] acl sets x-amz-acl HTTP header. Valid values include, private | public-read | public-read-write | authenticated-read | bucket-owner-read | bucket-owner-full-control
# @option options [String] cache_control sets Cache-Control header. For example, 'No-cache'
# @option options [String] content_disposition sets Content-Disposition HTTP header. For exampple, 'attachment; filename=testing.txt'
# @option options [String] content_encoding sets Content-Encoding HTTP header. For example, 'x-gzip'
# @option options [String] content_md5 sets Content-MD5. For example, '79054025255fb1a26e4bc422aef54eb4'
# @option options [String] content_type Content-Type. For example, 'text/plain'
# @option options [String] expires sets number of seconds before AWS Object expires.
# @option options [String] storage_class sets x-amz-storage-class HTTP header. Defaults to 'STANDARD'. Or, 'REDUCED_REDUNDANCY'
# @option options [String] encryption sets HTTP encryption header. Set to 'AES256' to encrypt files at rest on S3
# @return [Boolean] true if no errors
#
def save(options = {})
requires :body, :directory, :key
if options != {}
Fog::Logger.deprecation("options param is deprecated, use acl= instead [light_black](#{caller.first})[/]")
end
options['x-amz-acl'] ||= @acl if @acl
options['Cache-Control'] = cache_control if cache_control
options['Content-Disposition'] = content_disposition if content_disposition
options['Content-Encoding'] = content_encoding if content_encoding
options['Content-MD5'] = content_md5 if content_md5
options['Content-Type'] = content_type if content_type
options['Expires'] = expires if expires
options.merge!(metadata)
options['x-amz-storage-class'] = storage_class if storage_class
options.merge!(encryption_headers)
# With a single PUT operation you can upload objects up to 5 GB in size. Automatically set MP for larger objects.
self.multipart_chunk_size = 5242880 if !multipart_chunk_size && Fog::Storage.get_body_size(body) > 5368709120
if multipart_chunk_size && Fog::Storage.get_body_size(body) >= multipart_chunk_size && body.respond_to?(:read)
data = multipart_save(options)
merge_attributes(data.body)
else
data = service.put_object(directory.key, key, body, options)
merge_attributes(data.headers.reject {|key, value| ['Content-Length', 'Content-Type'].include?(key)})
end
self.etag = self.etag.gsub('"','') if self.etag
self.content_length = Fog::Storage.get_body_size(body)
self.content_type ||= Fog::Storage.get_content_type(body)
true
end
# Get a url for file.
#
# required attributes: key
#
# @param expires [String] number of seconds (since 1970-01-01 00:00) before url expires
# @param options [Hash]
# @return [String] url
#
def url(expires, options = {})
requires :key
collection.get_url(key, expires, options)
end
# File version if exists or creates new version.
# @return [Fog::AWS::Storage::Version]
#
def versions
@versions ||= begin
Fog::AWS::Storage::Versions.new(
:file => self,
:service => service
)
end
end
private
def directory=(new_directory)
@directory = new_directory
end
def multipart_save(options)
# Initiate the upload
res = service.initiate_multipart_upload(directory.key, key, options)
upload_id = res.body["UploadId"]
# Store ETags of upload parts
part_tags = []
# Upload each part
# TODO: optionally upload chunks in parallel using threads
# (may cause network performance problems with many small chunks)
# TODO: Support large chunk sizes without reading the chunk into memory
if body.respond_to?(:rewind)
body.rewind rescue nil
end
while (chunk = body.read(multipart_chunk_size)) do
part_upload = service.upload_part(directory.key, key, upload_id, part_tags.size + 1, chunk, part_headers(chunk, options))
part_tags << part_upload.headers["ETag"]
end
if part_tags.empty? #it is an error to have a multipart upload with no parts
part_upload = service.upload_part(directory.key, key, upload_id, 1, '', part_headers('', options))
part_tags << part_upload.headers["ETag"]
end
rescue
# Abort the upload & reraise
service.abort_multipart_upload(directory.key, key, upload_id) if upload_id
raise
else
# Complete the upload
service.complete_multipart_upload(directory.key, key, upload_id, part_tags)
end
def encryption_headers
if encryption && encryption_key
encryption_customer_key_headers
elsif encryption
{ 'x-amz-server-side-encryption' => encryption, 'x-amz-server-side-encryption-aws-kms-key-id' => kms_key_id }.reject {|_, value| value.nil?}
else
{}
end
end
def part_headers(chunk, options)
md5 = Base64.encode64(OpenSSL::Digest::MD5.digest(chunk)).strip
encryption_keys = encryption_customer_key_headers.keys
encryption_headers = options.select { |key| encryption_keys.include?(key) }
{ 'Content-MD5' => md5 }.merge(encryption_headers)
end
def encryption_customer_key_headers
{
'x-amz-server-side-encryption-customer-algorithm' => encryption,
'x-amz-server-side-encryption-customer-key' => Base64.encode64(encryption_key.to_s).chomp!,
'x-amz-server-side-encryption-customer-key-md5' => Base64.encode64(OpenSSL::Digest::MD5.digest(encryption_key.to_s)).chomp!
}
end
end
end
end
end