class Hydra::Derivatives::TempfileService

Attributes

source_file[R]

Public Class Methods

create(file, &block) click to toggle source
# File lib/hydra/derivatives/services/tempfile_service.rb, line 5
def self.create(file, &block)
  new(file).tempfile(&block)
end
new(source_file) click to toggle source
# File lib/hydra/derivatives/services/tempfile_service.rb, line 11
def initialize(source_file)
  @source_file = source_file
end

Public Instance Methods

default_tempfile() { |f| ... } click to toggle source
# File lib/hydra/derivatives/services/tempfile_service.rb, line 23
def default_tempfile(&_block)
  Tempfile.open(filename_for_characterization) do |f|
    f.binmode
    if source_file.content.respond_to? :read
      f.write(source_file.content.read)
    else
      f.write(source_file.content)
    end
    source_file.content.rewind if source_file.content.respond_to? :rewind
    f.rewind
    yield(f)
  end
end
filename_for_characterization() click to toggle source
# File lib/hydra/derivatives/services/tempfile_service.rb, line 37
def filename_for_characterization
  registered_mime_type = MIME::Types[source_file.mime_type].first
  Logger.warn "Unable to find a registered mime type for #{source_file.mime_type.inspect} on #{source_file.uri}" unless registered_mime_type
  extension = registered_mime_type ? ".#{registered_mime_type.extensions.first}" : ''
  version_id = 1 # TODO: fixme
  m = %r{/([^/]*)$}.match(source_file.uri)
  ["#{m[1]}-#{version_id}", extension.to_s]
end
tempfile(&block) click to toggle source
# File lib/hydra/derivatives/services/tempfile_service.rb, line 15
def tempfile(&block)
  if source_file.respond_to? :to_tempfile
    source_file.send(:to_tempfile, &block)
  elsif source_file.has_content?
    default_tempfile(&block)
  end
end