module Paperclip
module Storage
# The default place to store attachments is in the filesystem. Files on the local
# filesystem can be very easily served by Apache without requiring a hit to your app.
# They also can be processed more easily after they've been saved, as they're just
# normal files. There is one Filesystem-specific option for has_attached_file.
# * +path+: The location of the repository of attachments on disk. This can (and, in
# almost all cases, should) be coordinated with the value of the +url+ option to
# allow files to be saved into a place where Apache can serve them without
# hitting your app. Defaults to
# ":rails_root/public/:attachment/:id/:style/:basename.:extension"
# By default this places the files in the app's public directory which can be served
# directly. If you are using capistrano for deployment, a good idea would be to
# make a symlink to the capistrano-created system directory from inside your app's
# public directory.
# See Paperclip::Attachment#interpolate for more information on variable interpolaton.
# :path => "/var/app/attachments/:class/:id/:style/:basename.:extension"
module Filesystem
def self.extended base
end
def exists?(style = default_style)
if original_filename
File.exist?(path(style))
else
false
end
end
# Returns representation of the data of the file assigned to the given
# style, in the format most representative of the current storage.
def to_file style = default_style
@queued_for_write[style] || (File.new(path(style), 'rb') if exists?(style))
end
alias_method :to_io, :to_file
def flush_writes #:nodoc:
logger.info("[paperclip] Writing files for #{name}")
@queued_for_write.each do |style, file|
FileUtils.mkdir_p(File.dirname(path(style)))
logger.info("[paperclip] -> #{path(style)}")
FileUtils.mv(file.path, path(style))
FileUtils.chmod(0644, path(style))
file.close
end
@queued_for_write = {}
end
def flush_deletes #:nodoc:
logger.info("[paperclip] Deleting files for #{name}")
@queued_for_delete.each do |path|
begin
logger.info("[paperclip] -> #{path}")
FileUtils.rm(path) if File.exist?(path)
rescue Errno::ENOENT => e
# ignore file-not-found, let everything else pass
end
end
@queued_for_delete = []
end
end
# Amazon's S3 file hosting service is a scalable, easy place to store files for
# distribution. You can find out more about it at http://aws.amazon.com/s3
# There are a few S3-specific options for has_attached_file:
# * +s3_credentials+: Takes a path, a File, or a Hash. The path (or File) must point
# to a YAML file containing the +access_key_id+ and +secret_access_key+ that Amazon
# gives you. You can 'environment-space' this just like you do to your
# database.yml file, so different environments can use different accounts:
# development:
# access_key_id: 123...
# secret_access_key: 123...
# test:
# access_key_id: abc...
# secret_access_key: abc...
# production:
# access_key_id: 456...
# secret_access_key: 456...
# This is not required, however, and the file may simply look like this:
# access_key_id: 456...
# secret_access_key: 456...
# In which case, those access keys will be used in all environments. You can also
# put your bucket name in this file, instead of adding it to the code directly.
# This is useful when you want the same account but a different bucket for
# development versus production.
# * +s3_permissions+: This is a String that should be one of the "canned" access
# policies that S3 provides (more information can be found here:
# http://docs.amazonwebservices.com/AmazonS3/2006-03-01/RESTAccessPolicy.html#RESTCannedAccessPolicies)
# The default for Paperclip is "public-read".
# * +s3_protocol+: The protocol for the URLs generated to your S3 assets. Can be either
# 'http' or 'https'. Defaults to 'http' when your :s3_permissions are 'public-read' (the
# default), and 'https' when your :s3_permissions are anything else.
# * +bucket+: This is the name of the S3 bucket that will store your files. Remember
# that the bucket must be unique across all of Amazon S3. If the bucket does not exist
# Paperclip will attempt to create it. The bucket name will not be interpolated.
# * +url+: There are two options for the S3 url. You can choose to have the bucket's name
# placed domain-style (bucket.s3.amazonaws.com) or path-style (s3.amazonaws.com/bucket).
# Normally, this won't matter in the slightest and you can leave the default (which is
# path-style, or :s3_path_url). But in some cases paths don't work and you need to use
# the domain-style (:s3_domain_url). Anything else here will be treated like path-style.
# * +path+: This is the key under the bucket in which the file will be stored. The
# URL will be constructed from the bucket and the path. This is what you will want
# to interpolate. Keys should be unique, like filenames, and despite the fact that
# S3 (strictly speaking) does not support directories, you can still use a / to
# separate parts of your file name.
module S3
def self.extended base
require 'right_aws'
base.instance_eval do
@s3_credentials = parse_credentials(@options[:s3_credentials])
@bucket = @options[:bucket] || @s3_credentials[:bucket]
@s3_options = @options[:s3_options] || {}
@s3_permissions = @options[:s3_permissions] || 'public-read'
@s3_protocol = @options[:s3_protocol] || (@s3_permissions == 'public-read' ? 'http' : 'https')
@url = ":s3_path_url" unless @url.to_s.match(/^:s3.*url$/)
end
base.class.interpolations[:s3_path_url] = lambda do |attachment, style|
"#{attachment.s3_protocol}://s3.amazonaws.com/#{attachment.bucket_name}/#{attachment.path(style).gsub(%r{^/}, "")}"
end
base.class.interpolations[:s3_domain_url] = lambda do |attachment, style|
"#{attachment.s3_protocol}://#{attachment.bucket_name}.s3.amazonaws.com/#{attachment.path(style).gsub(%r{^/}, "")}"
end
ActiveRecord::Base.logger.info("[paperclip] S3 Storage Initalized.")
end
def s3
@s3 ||= RightAws::S3.new(@s3_credentials[:access_key_id],
@s3_credentials[:secret_access_key],
@s3_options)
end
def s3_bucket
@s3_bucket ||= s3.bucket(@bucket, true, @s3_permissions)
end
def bucket_name
@bucket
end
def parse_credentials creds
creds = find_credentials(creds).stringify_keys
(creds[ENV['RAILS_ENV']] || creds).symbolize_keys
end
def exists?(style = default_style)
s3_bucket.key(path(style)) ? true : false
end
def s3_protocol
@s3_protocol
end
# Returns representation of the data of the file assigned to the given
# style, in the format most representative of the current storage.
def to_file style = default_style
@queued_for_write[style] || s3_bucket.key(path(style))
end
alias_method :to_io, :to_file
def flush_writes #:nodoc:
logger.info("[paperclip] Writing files for #{name}")
@queued_for_write.each do |style, file|
begin
logger.info("[paperclip] -> #{path(style)}")
key = s3_bucket.key(path(style))
key.data = file
key.put(nil, @s3_permissions, {'Content-type' => instance_read(:content_type)})
rescue RightAws::AwsError => e
raise
end
end
@queued_for_write = {}
end
def flush_deletes #:nodoc:
logger.info("[paperclip] Writing files for #{name}")
@queued_for_delete.each do |path|
begin
logger.info("[paperclip] -> #{path}")
if file = s3_bucket.key(path)
file.delete
end
rescue RightAws::AwsError
# Ignore this.
end
end
@queued_for_delete = []
end
def find_credentials creds
case creds
when File:
YAML.load_file(creds.path)
when String:
YAML.load_file(creds)
when Hash:
creds
else
raise ArgumentError, "Credentials are not a path, file, or hash."
end
end
private :find_credentials
end
end
end