126 lines
4.1 KiB
Python
126 lines
4.1 KiB
Python
from typing import Any
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from pyfall.const import __version__
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import asyncio
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import logging
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import time
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from httpx import AsyncClient
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from pyfall.const import get_logger
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from pyfall.client.error import LibraryException, HTTPException, ScryfallError, Forbidden, NotFound
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from pyfall.client.http.http_requests.card import CardRequests
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from pyfall.client.http.http_requests.set import SetRequests
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from pyfall.client.route import Route
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class GlobalLock:
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def __init__(self) -> None:
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self._lock = asyncio.Lock()
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self.max_requests = 10
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self._calls = self.max_requests
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self._reset_time = 0
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def reset_calls(self) -> None:
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"""Resets the calls to the max amount."""
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self._calls = self.max_requests
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self._reset_time = time.perf_counter() + 1
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def set_reset_time(self, delta: float) -> None:
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"""
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Sets the reset time to the current time + delta.
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To be called if a 429 is received.
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Args:
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delta: The time to wait before resetting the calls.
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"""
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self._reset_time = time.perf_counter() + delta
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self._calls = 0
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async def wait(self) -> None:
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"""Throttles calls to prevent hitting the global rate limit."""
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async with self._lock:
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if self._reset_time <= time.perf_counter():
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self.reset_calls()
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elif self._calls <= 0:
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await asyncio.sleep(self._reset_time - time.perf_counter())
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self.reset_calls()
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self._calls -= 1
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class Pyfall(CardRequests, SetRequests):
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def __init__(self, logger: logging.Logger | None = None):
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self.__headers = {
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"Content-Type": "application/json",
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"UserAgent": f"pyfall/{__version__}",
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"Accept": "application/json",
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}
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self.__client: AsyncClient = None # type: ignore
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self.global_lock: GlobalLock = GlobalLock()
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self._max_attempts: int = 3
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self.logger: logging.Logger = logger # type: ignore
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if self.logger is None:
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self.logger = get_logger()
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async def request(self, route: Route, params: dict | None = None, **kwargs: dict) -> dict[str, Any]:
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"""
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Make a request to the Scryfall API.
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Args:
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route: Route to take
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params: Query string parameters. Defaults to None.
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Returns:
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dict[str, Any]: Raw result
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"""
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if params is not None:
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kwargs["params"] = params
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if not self.__client:
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self.__client = AsyncClient(headers=self.__headers)
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for attempt in range(self._max_attempts):
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await self.global_lock.wait()
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response = await self.__client.request(route.method, route.url, **kwargs) # type: ignore
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if response.status_code == 429:
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self.logger.warning("Too many requests, waiting 5 seconds")
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self.global_lock.set_reset_time(5)
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continue
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if response.status_code >= 500:
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self.logger.warning(
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f"{route.resolved_endpoint} Received {response.status_code}... retrying in {1 + attempt * 2} seconds"
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)
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await asyncio.sleep(1 + attempt * 2)
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continue
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result = response.json()
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if not 300 > response.status_code >= 200:
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await self._raise_exception(response, route, result)
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return result
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raise LibraryException(f"Failed to get endpoint {route.endpoint}")
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async def _raise_exception(self, response, route, result) -> None:
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self.logger.error(f"{route.method}::{route.url}: {response.status_code}")
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if response.status_code == 403:
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raise Forbidden(response, route)
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if response.status_code == 404:
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raise NotFound(response, route)
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if response.status_code >= 500:
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raise ScryfallError(response, route)
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raise HTTPException(response, route)
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async def close(self) -> None:
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"""Close the session."""
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if self.__client is not None and not self.__client.is_closed:
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await self.__client.aclose()
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