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# -*- ruby encoding: utf-8 -*-
$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
require 'open-uri'
require 'nokogiri'
require 'cgi'
require 'pathname'
require 'yaml'
ENV['RUBY_MIME_TYPES_LAZY_LOAD'] = 'yes'
require 'mime/types'
class MIME::Types
def self.deprecated(*_args, &_block)
# We are an internal tool. Silence deprecation warnings.
end
end
class IANARegistry
DEFAULTS = {
url: %q(https://www.iana.org/assignments/media-types/media-types.xml),
to: Pathname(__FILE__).join('../../type-lists')
}.freeze.each_value(&:freeze)
def self.download(options = {})
dest = Pathname(options[:to] || DEFAULTS[:to]).expand_path
url = options.fetch(:url, DEFAULTS[:url])
puts 'Downloading IANA MIME type assignments.'
puts "\t#{url}"
xml = Nokogiri::XML(open(url) { |f| f.read })
xml.css('registry registry').each do |registry|
next if registry.at_css('title').text == 'example'
new(registry: registry, to: dest) do |parser|
puts "Extracting #{parser.type}/*."
parser.parse
parser.save
end
end
end
attr_reader :type
def initialize(options = {})
@registry = options.fetch(:registry)
@to = Pathname(options.fetch(:to)).expand_path
@type = @registry.at_css('title').text
@name = "#{@type}.yaml"
@file = @to.join(@name)
@types = mime_types_for(@file)
yield self if block_given?
end
ASSIGNMENT_FILE_REF = '{%s=http://www.iana.org/assignments/media-types/%s}'
def parse
@registry.css('record').each do |record|
subtype = record.at_css('name').text
obsolete = record.at_css('obsolete').text rescue nil
use_instead = record.at_css('deprecated').text rescue nil
if subtype =~ /OBSOLETE|DEPRECATE/i
use_instead ||= $1 if subtype =~ /in favou?r of (.*)/
obsolete = true
end
subtype, notes = subtype.split(/ /, 2)
refs, xrefs = parse_refs_and_files(
record.css('xref'),
record.css('file'),
subtype
)
xrefs['notes'] << notes if notes
content_type = [ @type, subtype ].join('/')
types = @types.select { |t|
(t.content_type.downcase == content_type.downcase)
}
if types.empty?
MIME::Type.new(content_type) do |mt|
mt.references = %w(IANA) + refs
mt.xrefs = xrefs
mt.registered = true
mt.obsolete = obsolete if obsolete
mt.use_instead = use_instead if use_instead
@types << mt
end
else
types.each { |mt|
mt.references = %w(IANA) + refs
mt.registered = true
mt.xrefs = xrefs
mt.obsolete = obsolete if obsolete
mt.use_instead = use_instead if use_instead
}
end
end
end
def save
@to.mkpath
File.open(@file, 'wb') { |f| f.puts @types.map.to_a.sort.uniq.to_yaml }
end
private
def mime_types_for(file)
if file.exist?
MIME::Types::Loader.load_from_yaml(file)
else
MIME::Types.new
end
end
def parse_refs_and_files(refs, files, subtype)
xr = MIME::Types::Container.new
r = []
refs.each do |xref|
type = xref['type']
data = xref['data']
r << ref_from_type(type, data)
xr[type] << data
end
files.each do |file|
file_name = if file.text == subtype
[ @type, subtype ].join('/')
else
file.text
end
if file['type'] == 'template'
r << (ASSIGNMENT_FILE_REF % [ file_name, file_name ])
end
xr[file['type']] << file_name
end
[ r, xr ]
end
def ref_from_type(type, data)
case type
when 'person'
"[#{data}]"
when 'rfc'
data.upcase
when 'draft'
"DRAFT:#{data.sub(/^RFC-/, 'draft-')}"
when 'rfc-errata'
"{RFC Errata #{data}=http://www.rfc-editor.org/errata_search.php?eid=#{data}}"
when 'uri'
"{#{data}}"
else # 'text' or something else
data
end
end
end
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