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|
# frozen_string_literal: true
##
module MIME; end
##
class MIME::Types; end
require "mime/types/data"
# This class is responsible for initializing the MIME::Types registry from
# the data files supplied with the mime-types library.
#
# The Loader will use one of the following paths:
# 1. The +path+ provided in its constructor argument;
# 2. The value of ENV["RUBY_MIME_TYPES_DATA"]; or
# 3. The value of MIME::Types::Data::PATH.
#
# When #load is called, the +path+ will be searched recursively for all YAML
# (.yml or .yaml) files. By convention, there is one file for each media
# type (application.yml, audio.yml, etc.), but this is not required.
class MIME::Types::Loader
# The path that will be read for the MIME::Types files.
attr_reader :path
# The MIME::Types container instance that will be loaded. If not provided
# at initialization, a new MIME::Types instance will be constructed.
attr_reader :container
# Creates a Loader object that can be used to load MIME::Types registries
# into memory, using YAML, JSON, or Columnar registry format loaders.
def initialize(path = nil, container = nil)
path = path || ENV["RUBY_MIME_TYPES_DATA"] || MIME::Types::Data::PATH
@container = container || MIME::Types.new
@path = File.expand_path(path)
end
# Loads a MIME::Types registry from YAML files (<tt>*.yml</tt> or
# <tt>*.yaml</tt>) recursively found in +path+.
#
# It is expected that the YAML objects contained within the registry array
# will be tagged as <tt>!ruby/object:MIME::Type</tt>.
#
# Note that the YAML format is about 2½ times *slower* than the JSON format.
#
# NOTE: The purpose of this format is purely for maintenance reasons.
def load_yaml
Dir[yaml_path].sort.each do |f|
container.add(*self.class.load_from_yaml(f), :silent)
end
container
end
# Loads a MIME::Types registry from JSON files (<tt>*.json</tt>)
# recursively found in +path+.
#
# It is expected that the JSON objects will be an array of hash objects.
# The JSON format is the registry format for the MIME types registry
# shipped with the mime-types library.
def load_json
Dir[json_path].sort.each do |f|
types = self.class.load_from_json(f)
container.add(*types, :silent)
end
container
end
# Loads a MIME::Types registry from columnar files recursively found in
# +path+.
def load_columnar
require "mime/types/columnar" unless defined?(MIME::Types::Columnar)
container.extend(MIME::Types::Columnar)
container.load_base_data(path)
container
end
# Loads a MIME::Types registry. Loads from JSON files by default
# (#load_json).
#
# This will load from columnar files (#load_columnar) if <tt>columnar:
# true</tt> is provided in +options+ and there are columnar files in +path+.
def load(options = {columnar: false})
if options[:columnar] && !Dir[columnar_path].empty?
load_columnar
else
load_json
end
end
class << self
# Loads the default MIME::Type registry.
def load(options = {columnar: false})
new.load(options)
end
# Loads MIME::Types from a single YAML file.
#
# It is expected that the YAML objects contained within the registry
# array will be tagged as <tt>!ruby/object:MIME::Type</tt>.
#
# Note that the YAML format is about 2½ times *slower* than the JSON
# format.
#
# NOTE: The purpose of this format is purely for maintenance reasons.
def load_from_yaml(filename)
begin
require "psych"
rescue LoadError
nil
end
require "yaml"
if old_yaml?
YAML.safe_load(read_file(filename), [MIME::Type])
else
YAML.safe_load(read_file(filename), permitted_classes: [MIME::Type])
end
end
# Loads MIME::Types from a single JSON file.
#
# It is expected that the JSON objects will be an array of hash objects.
# The JSON format is the registry format for the MIME types registry
# shipped with the mime-types library.
def load_from_json(filename)
require "json"
JSON.parse(read_file(filename)).map { |type| MIME::Type.new(type) }
end
private
def read_file(filename)
File.open(filename, "r:UTF-8:-", &:read)
end
def old_yaml?
@old_yaml ||=
begin
require "rubygems/version"
Gem::Version.new(YAML::VERSION) < Gem::Version.new("3.1")
end
end
end
private
def yaml_path
File.join(path, "*.y{,a}ml")
end
def json_path
File.join(path, "*.json")
end
def columnar_path
File.join(path, "*.column")
end
end
|
