122 lines
4.0 KiB
Python
122 lines
4.0 KiB
Python
# © lambda#0987
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# SPDX-License-Identifier: AGPL-3.0-or-later
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import sys
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import json
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import asyncio
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import aiohttp
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import platform
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import datetime
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import urllib.parse
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from typing import Dict
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from http import HTTPStatus
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from nextcord import PartialEmoji
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import utils.image as image_utils
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from utils.errors import RateLimitedError
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from nextcord import HTTPException, Forbidden, NotFound, DiscordServerError
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GuildId = int
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async def json_or_text(resp):
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text = await resp.text(encoding='utf-8')
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try:
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if resp.headers['content-type'] == 'application/json':
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return json.loads(text)
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except KeyError:
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# Thanks Cloudflare
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pass
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return text
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class EmoteClient:
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BASE_URL = 'https://discord.com/api/v9'
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HTTP_ERROR_CLASSES = {
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HTTPStatus.FORBIDDEN: Forbidden,
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HTTPStatus.NOT_FOUND: NotFound,
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HTTPStatus.SERVICE_UNAVAILABLE: DiscordServerError,
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}
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def __init__(self, bot):
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self.guild_rls: Dict[GuildId, float] = {}
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self.http = aiohttp.ClientSession(headers={
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'User-Agent': bot.config['user_agent'] + ' ' + bot.http.user_agent,
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'Authorization': 'Bot ' + bot.config['tokens']['discord'],
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'X-Ratelimit-Precision': 'millisecond',
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})
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async def request(self, method, path, guild_id, **kwargs):
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self.check_rl(guild_id)
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headers = {}
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# Emote Manager shouldn't use walrus op until Debian adopts 3.8 :(
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reason = kwargs.pop('reason', None)
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if reason:
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headers['X-Audit-Log-Reason'] = urllib.parse.quote(
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reason, safe='/ ')
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kwargs['headers'] = headers
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# TODO handle OSError and 500/502, like dpy does
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async with self.http.request(method, self.BASE_URL + path, **kwargs) as resp:
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if resp.status == HTTPStatus.TOO_MANY_REQUESTS:
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return await self._handle_rl(resp, method, path, guild_id, **kwargs)
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data = await json_or_text(resp)
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if resp.status in range(200, 300):
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return data
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error_cls = self.HTTP_ERROR_CLASSES.get(resp.status, HTTPException)
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raise error_cls(resp, data)
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# optimization method that lets us check the RL before downloading the user's image.
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# also lets us preemptively check the RL before doing a request
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def check_rl(self, guild_id):
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try:
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retry_at = self.guild_rls[guild_id]
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except KeyError:
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return
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now = datetime.datetime.now(tz=datetime.timezone.utc).timestamp()
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if retry_at < now:
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del self.guild_rls[guild_id]
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return
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raise RateLimitedError(retry_at)
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async def _handle_rl(self, resp, method, path, guild_id, **kwargs):
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retry_after = (await resp.json())['retry_after'] / 1000.0
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retry_at = datetime.datetime.now(
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tz=datetime.timezone.utc) + datetime.timedelta(seconds=retry_after)
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# cache unconditionally in case request() is called again while we're sleeping
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self.guild_rls[guild_id] = retry_at.timestamp()
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if retry_after < 10.0:
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await asyncio.sleep(retry_after)
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# woo mutual recursion
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return await self.request(method, path, guild_id, **kwargs)
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# we've been hit with one of those crazy high rate limits, which only occur for specific methods
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raise RateLimitedError(retry_at)
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async def create(self, *, guild, name, image: bytes, role_ids=(), reason=None):
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data = await self.request(
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'POST', f'/guilds/{guild.id}/emojis',
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guild.id,
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json=dict(name=name, image=image_utils.image_to_base64_url(
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image), roles=role_ids),
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reason=reason,
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)
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return PartialEmoji(animated=data.get('animated', False), name=data.get('name'), id=data.get('id'))
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async def __aenter__(self):
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self.http = await self.http.__aenter__()
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return self
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async def __aexit__(self, *excinfo):
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return await self.http.__aexit__(*excinfo)
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async def close(self):
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return await self.http.close()
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