code: def parse_header_links(self):
          
          for linktype, linkinfo in self.url_connection.links.items():
              url = linkinfo["url"]
              name = u"Link: header %s" % linktype
              self.add_url(url, name=name)
          if 'Refresh' in self.headers:
              from ..htmlutil.linkparse import refresh_re
              value = self.headers['Refresh'].strip()
              mo = refresh_re.match(value)
              if mo:
                  url = unicode_safe(mo.group("url"))
                  name = u"Refresh: header"
                  self.add_url(url, name=name)
          if 'Content-Location' in self.headers:
              url = self.headers['Content-Location'].strip()
              name = u"Content-Location: header"
              self.add_url(url, name=name)
docs: Parse URLs in HTTP headers Link:.