_parse_url (OpenID::TrustRoot::TrustRoot)

    # File lib/openid/trustroot.rb, line 173
          def TrustRoot._parse_url(url)
            begin
              url = URINorm.urinorm(url)
            rescue URI::InvalidURIError => err
              nil
            end

            begin
              parsed = URI::parse(url)
            rescue URI::InvalidURIError
              return nil
            end

            path = TrustRoot._build_path(parsed.path,
                                         parsed.query,
                                         parsed.fragment)

            return [parsed.scheme || '', parsed.host || '',
                    parsed.port || '', path || '']
          end