92 lines
2.7 KiB
Python
92 lines
2.7 KiB
Python
from __future__ import annotations
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import json
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import time
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from typing import Literal
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import uuid
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from app.database import User as DBUser
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from app.dependencies import get_current_user
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from app.dependencies.database import get_db
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from app.dependencies.user import get_current_user_by_token
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from app.models.signalr import NegotiateResponse, Transport
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from app.router.signalr.packet import SEP
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from .hub import Hubs
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from fastapi import APIRouter, Depends, Header, Query, WebSocket
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from sqlmodel.ext.asyncio.session import AsyncSession
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router = APIRouter()
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@router.post("/{hub}/negotiate", response_model=NegotiateResponse)
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async def negotiate(
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hub: Literal["spectator", "multiplayer", "metadata"],
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negotiate_version: int = Query(1, alias="negotiateVersion"),
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user: DBUser = Depends(get_current_user),
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):
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connectionId = str(user.id)
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connectionToken = f"{connectionId}:{uuid.uuid4()}"
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Hubs[hub].add_waited_client(
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connection_token=connectionToken,
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timestamp=int(time.time()),
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)
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return NegotiateResponse(
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connectionId=connectionId,
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connectionToken=connectionToken,
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negotiateVersion=negotiate_version,
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availableTransports=[Transport(transport="WebSockets")],
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)
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@router.websocket("/{hub}")
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async def connect(
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hub: Literal["spectator", "multiplayer", "metadata"],
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websocket: WebSocket,
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id: str,
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authorization: str = Header(...),
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db: AsyncSession = Depends(get_db),
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):
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token = authorization[7:]
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user_id = id.split(":")[0]
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hub_ = Hubs[hub]
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if id not in hub_:
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await websocket.close(code=1008)
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return
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if (user := await get_current_user_by_token(token, db)) is None or str(
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user.id
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) != user_id:
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await websocket.close(code=1008)
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return
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await websocket.accept()
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# handshake
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handshake = await websocket.receive_bytes()
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handshake_payload = json.loads(handshake[:-1])
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error = ""
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if (protocol := handshake_payload.get("protocol")) != "messagepack" or (
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handshake_payload.get("version")
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) != 1:
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error = f"Requested protocol '{protocol}' is not available."
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client = None
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try:
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client = hub_.add_client(
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connection_id=user_id,
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connection_token=id,
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connection=websocket,
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)
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except TimeoutError:
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error = f"Connection {id} has waited too long."
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except ValueError as e:
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error = str(e)
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payload = {"error": error} if error else {}
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# finish handshake
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await websocket.send_bytes(json.dumps(payload).encode() + SEP)
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if error or not client:
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await websocket.close(code=1008)
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return
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await hub_._listen_client(client)
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