def respond(req: Request, payload: dict, path: Optional[str]): if req.get_session_id() != self._request.get_session_id(): raise IllegalResponseException( f"Session IDs {req.get_session_id()} and " f"{self._request.get_session_id()} are not matching") if path is not None: res_path = path else: res_path = req.get_path() self._response = Request(path=res_path, session_id=req.get_session_id(), sender=self._request.get_receiver(), receiver=req.get_sender(), payload=payload)
class RestServerRequestManager: _request: Request _response: Optional[Request] def __init__(self, hostname: str, path: str, payload: dict, auth: Optional[AuthContainer]): self._response = None self._create_incoming_request(hostname, path, payload, auth) def __del__(self): pass def _create_incoming_request(self, hostname: str, path: str, payload: dict, auth: Optional[AuthContainer]): session_id = random.randint(0, 30000) sender = f"rest_client_{session_id}" self._request = Request(path=path, session_id=session_id, sender=sender, receiver=hostname, payload=payload) if auth is not None: self._request.set_auth(auth) self._request.set_callback_method(self._get_response_function()) def _get_response_function(self) -> response_callback_type: def respond(req: Request, payload: dict, path: Optional[str]): if req.get_session_id() != self._request.get_session_id(): raise IllegalResponseException( f"Session IDs {req.get_session_id()} and " f"{self._request.get_session_id()} are not matching") if path is not None: res_path = path else: res_path = req.get_path() self._response = Request(path=res_path, session_id=req.get_session_id(), sender=self._request.get_receiver(), receiver=req.get_sender(), payload=payload) return respond def get_request(self) -> Request: return self._request def await_response(self, timeout: int = 2) -> Request: start_time = datetime.now() while self._response is None: time.sleep(0.1) now = datetime.now() if now > (start_time + timedelta(seconds=timeout)): break if self._response is None: raise NoResponseReceivedError(self._request.get_path()) return self._response
def _handle_split_request(self, received_request: Request) -> Optional[Request]: req_payload = received_request.get_payload() id_str = str(received_request.get_session_id()) p_index = req_payload["package_index"] split_payload = req_payload["split_payload"] if p_index == 0: if "last_index" in req_payload: l_index = req_payload["last_index"] buf_json = { "start_req": received_request, "last_index": l_index, "payload_bits": [] } for i in range(l_index + 1): buf_json["payload_bits"].append(None) buf_json["payload_bits"][0] = split_payload self._part_data[id_str] = buf_json else: self._logger.error( "Received first block of split request without last_index") else: if id_str in self._part_data: req_data = self._part_data[id_str] req_data["payload_bits"][p_index] = split_payload if p_index >= req_data["last_index"] - 1: # TODO: Split requests should be recognized whether the last package is received last or not end_data = "" for str_data in req_data["payload_bits"]: if str_data is None: self._logger.error( "Detected missing data block in split request") break end_data += str_data try: end_data = end_data.replace("$*$", '"') json_data = json.loads(end_data) first_req: Request = req_data["start_req"] out_req = Request(first_req.get_path(), first_req.get_session_id(), first_req.get_sender(), first_req.get_receiver(), json_data) out_req.set_callback_method(first_req.get_callback()) del self._part_data[id_str] return out_req except json.decoder.JSONDecodeError: self._logger.error("Received illegal payload") else: self._logger.error( "Received a followup-block with no entry in storage") return None
def mock_response_function(req: Request, payload: dict, path: str): if path is None: buf_path = req.get_path() else: buf_path = path out_req = Request(path=buf_path, session_id=req.get_session_id(), sender=req.get_receiver(), receiver=req.get_sender(), payload=payload) self._last_response = out_req
def _respond_to(self, req: Request, payload: dict, path: Optional[str] = None): if path: out_path = path else: out_path = req.get_path() receiver = req.get_sender() out_req = Request(out_path, req.get_session_id(), self._host_name, receiver, payload) self._send(out_req)
def wait_for_responses(self, out_req: Request, timeout: int = 5, max_resp_count: Optional[int] = 1) -> list[Request]: if not self._keep_queue: self._request_queue = Queue() else: self._keep_queue = False responses: list[Request] = [] timeout_time = datetime.now() + timedelta(seconds=timeout) while timeout and datetime.now() < timeout_time: if max_resp_count and len( responses ) >= max_resp_count: # return responses if enough are collected return responses if not self._request_queue.empty(): res: Request = self._request_queue.get() if res.get_session_id() == out_req.get_session_id( ) and out_req.get_sender() != res.get_sender(): responses.append(res) return responses
def send_request_split(self, path: str, receiver: str, payload: dict, part_max_size: int = 30, timeout: Optional[int] = None) -> Optional[Request]: """ Sends a request to all attached networks. The request will be split into individual parts with a maximum length. :param path: Path to send the request on :param receiver: Receiver for the Request :param payload: Payload to be send :param part_max_size: Maximum size in bytes for each individual payload chunk :param timeout: Maximum timeout to wait for an answer :return: The response if there is any """ if timeout is None: timeout = self._default_timeout req = Request(path, None, self._hostname, receiver, payload) session_id = req.get_session_id() path = req.get_path() sender = req.get_sender() receiver = req.get_receiver() payload_str = json.dumps(req.get_payload()) # Make string ready to be contained in json itself payload_str = payload_str.replace('"', "$*$") payload_len = len(payload_str) parts = [] start = 0 package_index = 0 while start < payload_len: end = start + part_max_size payload_part = payload_str[start:( end if end < payload_len else payload_len)] parts.append(payload_part) start = end last_index = len(parts) for payload_part in parts: out_dict = { "package_index": package_index, "split_payload": payload_part } if package_index == 0: out_dict["last_index"] = last_index out_req = Request(path, session_id, sender, receiver, out_dict) if package_index == last_index - 1: responses = self._send_request_obj(out_req, timeout, 1) if not responses: return None return responses[0] else: self._send_request_obj(out_req, 0, 0) package_index += 1 sleep(0.1) return None