""" k8s utils """ import asyncio import atexit import csv import io import json import signal import os import sys from datetime import datetime from typing import Optional, Dict, Union, List from fastapi import HTTPException from fastapi.responses import StreamingResponse from slugify import slugify def get_templates_dir(): """return directory containing templates for loading""" return os.path.join(os.path.dirname(__file__), "templates") def from_k8s_date(string): """convert k8s date string to datetime""" return datetime.fromisoformat(string[:-1]) if string else None def to_k8s_date(dt_val): """convert datetime to string for k8s""" return dt_val.isoformat("T") + "Z" def dt_now(): """get current ts""" return datetime.utcnow().replace(microsecond=0, tzinfo=None) def ts_now(): """get current ts""" return str(dt_now()) def run_once_lock(name): """run once lock via temp directory - if dir doesn't exist, return true - if exists, return false""" lock_dir = "/tmp/." + name try: os.mkdir(lock_dir) # pylint: disable=bare-except except: return False # just in case, delete dir on exit def del_dir(): print("release lock: " + lock_dir, flush=True) os.rmdir(lock_dir) atexit.register(del_dir) return True def register_exit_handler(): """register exit handler to exit on SIGTERM""" loop = asyncio.get_running_loop() def exit_handler(): """sigterm handler""" print("SIGTERM received, exiting") sys.exit(1) loop.add_signal_handler(signal.SIGTERM, exit_handler) def parse_jsonl_error_messages(errors): """parse json-l error strings from redis/db into json""" parsed_errors = [] for error_line in errors: if not error_line: continue try: result = json.loads(error_line) parsed_errors.append(result) except json.JSONDecodeError as err: print( f"Error decoding json-l error line: {error_line}. Error: {err}", flush=True, ) return parsed_errors def is_bool(stri: Optional[str]) -> bool: """Check if the string parameter is stringly true""" if stri: return stri.lower() in ("true", "1", "yes") return False def slug_from_name(name: str) -> str: """Generate slug from name""" return slugify(name.replace("'", "")) def stream_dict_list_as_csv(data: List[Dict[str, Union[str, int]]], filename: str): """Stream list of dictionaries as CSV with attachment filename header""" if not data: raise HTTPException(status_code=404, detail="crawls_not_found") keys = data[0].keys() buffer = io.StringIO() dict_writer = csv.DictWriter(buffer, keys, quoting=csv.QUOTE_NONNUMERIC) dict_writer.writeheader() dict_writer.writerows(data) return StreamingResponse( iter([buffer.getvalue()]), media_type="text/csv", headers={"Content-Disposition": f"attachment;filename={filename}"}, )