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- class XrdController < ApplicationController
- before_filter :set_format
-
- def host_meta
- @webfinger_template = "#{webfinger_url}?resource={uri}"
- end
-
- def webfinger
- @account = Account.find_by!(username: username_from_resource, domain: nil)
- @canonical_account_uri = "acct:#{@account.username}@#{Rails.configuration.x.local_domain}"
- @magic_key = pem_to_magic_key(@account.keypair.public_key)
- rescue ActiveRecord::RecordNotFound
- render nothing: true, status: 404
- end
-
- private
-
- def set_format
- request.format = 'xml'
- response.headers['Content-Type'] = 'application/xrd+xml'
- end
-
- def username_from_resource
- if params[:resource].start_with?('acct:')
- params[:resource].split('@').first.gsub('acct:', '')
- else
- url = Addressable::URI.parse(params[:resource])
- url.path.gsub('/users/', '')
- end
- end
-
- def pem_to_magic_key(public_key)
- modulus, exponent = [public_key.n, public_key.e].map do |component|
- result = ""
-
- until component == 0 do
- result << [component % 256].pack('C')
- component >>= 8
- end
-
- result.reverse!
- end
-
- (["RSA"] + [modulus, exponent].map { |n| Base64.urlsafe_encode64(n) }).join('.')
- end
- end
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