code: def environ(request: httputil.HTTPServerRequest) -> Dict[Text, Any]:
          
          hostport = request.host.split(":")
          if len(hostport) == 2:
              host = hostport[0]
              port = int(hostport[1])
          else:
              host = request.host
              port = 443 if request.protocol == "https" else 80
          environ = {
              "REQUEST_METHOD": request.method,
              "SCRIPT_NAME": "",
              "PATH_INFO": to_wsgi_str(
                  escape.url_unescape(request.path, encoding=None, plus=False)
              ),
              "QUERY_STRING": request.query,
              "REMOTE_ADDR": request.remote_ip,
              "SERVER_NAME": host,
              "SERVER_PORT": str(port),
              "SERVER_PROTOCOL": request.version,
              "wsgi.version": (1, 0),
              "wsgi.url_scheme": request.protocol,
              "wsgi.input": BytesIO(escape.utf8(request.body)),
              "wsgi.errors": sys.stderr,
              "wsgi.multithread": False,
              "wsgi.multiprocess": True,
              "wsgi.run_once": False,
          }
          if "Content-Type" in request.headers:
              environ["CONTENT_TYPE"] = request.headers.pop("Content-Type")
          if "Content-Length" in request.headers:
              environ["CONTENT_LENGTH"] = request.headers.pop("Content-Length")
          for key, value in request.headers.items():
              environ["HTTP_" + key.replace("-", "_").upper()] = value
          return environ
docs: Converts a `tornado.httputil.HTTPServerRequest` to a WSGI environment.