robdiciuccio commented on a change in pull request #11499: URL: https://github.com/apache/incubator-superset/pull/11499#discussion_r540439378
########## File path: superset/utils/async_query_manager.py ########## @@ -0,0 +1,200 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +import json +import logging +import uuid +from typing import Any, Dict, List, Optional, Tuple + +import jwt +import redis +from flask import Flask, Request, Response, session + +logger = logging.getLogger(__name__) + + +class AsyncQueryTokenException(Exception): + pass + + +class AsyncQueryJobException(Exception): + pass + + +def build_job_metadata(channel_id: str, job_id: str, **kwargs: Any) -> Dict[str, Any]: + return { + "channel_id": channel_id, + "job_id": job_id, + "user_id": session.get("user_id"), + "status": kwargs.get("status"), + "errors": kwargs.get("errors", []), + "result_url": kwargs.get("result_url"), + } + + +def parse_event(event_data: Tuple[str, Dict[str, Any]]) -> Dict[str, Any]: + event_id = event_data[0] + event_payload = event_data[1]["data"] + return {"id": event_id, **json.loads(event_payload)} + + +def increment_id(redis_id: str) -> str: + # redis stream IDs are in this format: '1607477697866-0' + try: + prefix, last = redis_id[:-1], int(redis_id[-1]) + return prefix + str(last + 1) + except Exception: # pylint: disable=broad-except + return redis_id + + +class AsyncQueryManager: + MAX_EVENT_COUNT = 100 + STATUS_PENDING = "pending" + STATUS_RUNNING = "running" + STATUS_ERROR = "error" + STATUS_DONE = "done" + + def __init__(self) -> None: + super().__init__() + self._redis: redis.Redis + self._stream_prefix: str = "" + self._stream_limit: Optional[int] + self._stream_limit_firehose: Optional[int] + self._jwt_cookie_name: str + self._jwt_cookie_secure: bool = False + self._jwt_secret: str + + def init_app(self, app: Flask) -> None: + config = app.config + if ( + config["CACHE_CONFIG"]["CACHE_TYPE"] == "null" + or config["DATA_CACHE_CONFIG"]["CACHE_TYPE"] == "null" + ): + raise Exception( + """ + Cache backends (CACHE_CONFIG, DATA_CACHE_CONFIG) must be configured + and non-null in order to enable async queries + """ + ) + + if len(config["GLOBAL_ASYNC_QUERIES_JWT_SECRET"]) < 32: + raise AsyncQueryTokenException( + "Please provide a JWT secret at least 32 bytes long" + ) + + self._redis = redis.Redis( # type: ignore + **config["GLOBAL_ASYNC_QUERIES_REDIS_CONFIG"], decode_responses=True + ) + self._stream_prefix = config["GLOBAL_ASYNC_QUERIES_REDIS_STREAM_PREFIX"] + self._stream_limit = config["GLOBAL_ASYNC_QUERIES_REDIS_STREAM_LIMIT"] + self._stream_limit_firehose = config[ + "GLOBAL_ASYNC_QUERIES_REDIS_STREAM_LIMIT_FIREHOSE" + ] + self._jwt_cookie_name = config["GLOBAL_ASYNC_QUERIES_JWT_COOKIE_NAME"] + self._jwt_cookie_secure = config["GLOBAL_ASYNC_QUERIES_JWT_COOKIE_SECURE"] + self._jwt_secret = config["GLOBAL_ASYNC_QUERIES_JWT_SECRET"] + + @app.after_request + def validate_session( # pylint: disable=unused-variable + response: Response, + ) -> Response: + reset_token = False + user_id = session["user_id"] if "user_id" in session else None + + if "async_channel_id" not in session or "async_user_id" not in session: + reset_token = True + elif user_id != session["async_user_id"]: + reset_token = True + + if reset_token: + async_channel_id = str(uuid.uuid4()) + session["async_channel_id"] = async_channel_id + session["async_user_id"] = user_id + + token = self.generate_jwt( + {"channel": async_channel_id, "user_id": user_id} + ) + + response.set_cookie( + self._jwt_cookie_name, + value=token, + httponly=True, + secure=self._jwt_cookie_secure, + # max_age=max_age or config.cookie_max_age, + # domain=config.cookie_domain, + # path=config.access_cookie_path, + # samesite=config.cookie_samesite + ) + + return response + + def generate_jwt(self, data: Dict[str, Any]) -> str: + encoded_jwt = jwt.encode(data, self._jwt_secret, algorithm="HS256") + return encoded_jwt.decode("utf-8") + + def parse_jwt(self, token: str) -> Dict[str, Any]: + data = jwt.decode(token, self._jwt_secret, algorithms=["HS256"]) + return data + + def parse_jwt_from_request(self, request: Request) -> Dict[str, Any]: + token = request.cookies.get(self._jwt_cookie_name) Review comment: See comments above re: `FLASK_JWT_EXTENDED` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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