111 lines
4.2 KiB
Python
111 lines
4.2 KiB
Python
"""Optional P2P phone pairing plug-in for hub.py."""
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import asyncio
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import os
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import random
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from pathlib import Path
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from fastapi import Response
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from fastapi.responses import JSONResponse
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from p2p_ws_client import HTTPExporter, connect_saved, create_code, load_room, save_room
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def install(app, *, web_port, token, here):
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signal = os.environ.get("GA_P2P_SIGNAL", "ws://47.101.182.29:49157/ws")
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name = os.environ.get("GA_P2P_NAME", "ga-hub-phone")
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rooms = Path(os.environ.get("GA_P2P_ROOMS", "~/.p2p_ws/rooms.json")).expanduser()
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state = {"task": None, "invite": None, "status": "idle", "error": None,
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"started": False}
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app.state.p2p_pair_open = True
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async def export(ws):
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exporter = await HTTPExporter(
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ws, f"http://127.0.0.1:{web_port}",
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allow=("/api/",), query={"t": token},
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).start()
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try:
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state["status"], state["error"] = "connected", None
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await exporter.wait_closed()
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finally:
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await exporter.close()
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async def reconnect():
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delay = 1
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while True:
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connected = False
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try:
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state["status"], state["error"] = "reconnecting", None
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ws = await connect_saved(name, path=rooms, direct_timeout=15)
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connected = True
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try:
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await export(ws)
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finally:
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await ws.close() # 不关会泄漏信令连接: 旧连接与新连接自配对占满房间
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except asyncio.CancelledError:
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raise
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except Exception as exc:
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state["status"], state["error"] = "error", str(exc)
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# 连上过就立刻重连(对端掉线/被顶号)；连不上则指数退避+抖动，
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# 避免服务端重启时上千个 hub 同一秒齐涌。
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delay = 1 if connected else min(delay * 2, 60)
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await asyncio.sleep(0.2 if connected else delay * random.uniform(0.5, 1.5))
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async def new_pair():
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try:
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invite = state["invite"] = await create_code(
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signal, name=name + "-pending", rooms_file=rooms,
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)
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state["status"], state["error"] = "waiting", None
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ws = await invite.connect(direct_timeout=15)
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save_room(signal, invite.room, name=name, path=rooms)
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try:
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await export(ws)
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finally:
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await ws.close()
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await reconnect()
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except asyncio.CancelledError:
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raise
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except Exception as exc:
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state["status"], state["error"] = "error", str(exc)
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@app.get("/pair")
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async def pair():
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task = state["task"]
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if task is None or task.done():
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try:
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load_room(name, path=rooms)
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except KeyError:
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state["task"] = asyncio.create_task(new_pair())
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else:
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state["task"] = asyncio.create_task(reconnect())
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return Response(content='''<!doctype html><meta charset="utf-8"><title>PC pairing</title>
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<h2>Phone pairing</h2><p>Enter this code on the phone:</p><pre id="code">waiting...</pre>
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<p id="state">starting...</p><script>
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async function poll(){try{let r=await fetch('/pair/status'),s=await r.json();
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document.querySelector('#code').textContent=s.code||'-';
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document.querySelector('#state').textContent=s.status+(s.error?' : '+s.error:'');
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if(s.status!=='connected')setTimeout(poll,1000)}catch(e){document.querySelector('#state').textContent=e}}
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poll();</script>''', media_type="text/html")
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@app.get("/pair/status")
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async def pair_status():
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invite = state["invite"]
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return JSONResponse({
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"status": state["status"],
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"code": getattr(invite, "code", None),
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"expires_at": getattr(invite, "expires_at", None),
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"error": state["error"],
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})
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async def startup():
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if state["started"]:
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return
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state["started"] = True
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try:
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load_room(name, path=rooms)
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except KeyError:
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return
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state["task"] = asyncio.create_task(reconnect())
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app.add_event_handler("startup", startup)
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return state
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