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import logging
from abc import ABCMeta
from typing import Optional
from aiohttp import ClientConnectorError, ClientSession
from discord.ext.commands import CogMeta
from bot.constants import URLs
log = logging.getLogger(__name__)
class CogABCMeta(CogMeta, ABCMeta):
"""Metaclass for ABCs meant to be implemented as Cogs."""
pass
async def send_to_paste_service(http_session: ClientSession, contents: str, *, extension: str = "") -> Optional[str]:
"""
Upload `contents` to the paste service.
`http_session` should be the current running ClientSession from aiohttp
`extension` is added to the output URL
When an error occurs, `None` is returned, otherwise the generated URL with the suffix.
"""
extension = extension and f".{extension}"
log.debug(f"Sending contents of size {len(contents.encode())} bytes to paste service.")
paste_url = URLs.paste_service.format(key="documents")
try:
async with http_session.post(paste_url, data=contents) as response:
response_json = await response.json()
except ClientConnectorError:
log.warning(f"Failed to connect to paste service at url {paste_url}.")
return
if "message" in response_json:
log.warning(f"Paste service returned error {response_json['message']} with status code {response.status}.")
return
elif "key" in response_json:
log.trace(f"Successfully uploaded contents to paste service behind key {response_json['key']}.")
return URLs.paste_service.format(key=response_json['key']) + extension
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