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import asyncio
import http.client
import json
import logging
import socket
import urllib.error
import urllib.request

from defence360agent.contracts.config import Core

logger = logging.getLogger(__name__)


class APIError(Exception):
    def __init__(self, *args, **kwargs) -> None:
        super().__init__(*args, **kwargs)
        if len(args) >= 2:
            _, status_code, *args = args
            self.status_code = status_code
        else:
            self.status_code = None


class API:
    _BASE_URL = Core.API_BASE_URL
    _SOCKET_TIMEOUT = 300

    @classmethod
    def request(cls, request: urllib.request.Request, json_loads=True):
        try:
            with urllib.request.urlopen(
                request,
                # agent should be able to wait for a while
                # in lb queue before being connected
                timeout=cls._SOCKET_TIMEOUT,
            ) as response:
                logger.info(
                    "Performed request for url=%s method=%s body=%s status=%s",
                    request.full_url,
                    getattr(request, "method", None),
                    request.data,
                    response.status,
                )
                if response.status != 200:
                    raise APIError(
                        "status code is {}".format(response.status),
                        response.status,
                    )
                plain_response = response.read()
                logger.info("Response=%s ...", plain_response[:50])
                if json_loads:
                    result = json.loads(plain_response.decode())
                else:
                    result = plain_response
                return result
        except (
            UnicodeDecodeError,
            http.client.HTTPException,
            json.JSONDecodeError,
            socket.timeout,
            urllib.error.URLError,
        ) as e:
            status_code = getattr(e, "code", None)
            raise APIError(
                "request failed, reason: %s" % (e,), status_code
            ) from e

    @classmethod
    async def async_request(cls, request, executor=None):
        loop = asyncio.get_event_loop()
        return await loop.run_in_executor(executor, cls.request, request)

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