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keepalive for stale mitigation

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Flowseal
2026-03-21 09:26:34 +03:00
parent c1452c23da
commit ed85e2a284
2 changed files with 269 additions and 5 deletions
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28
proxy/tg_ws_proxy.py
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@@ -618,6 +618,7 @@ async def _bridge_ws(reader, writer, ws: RawWebSocket, label,
up_packets = 0
down_packets = 0
start_time = asyncio.get_event_loop().time()
last_recv_time = start_time
async def tcp_to_ws():
nonlocal up_bytes, up_packets
@@ -644,31 +645,48 @@ async def _bridge_ws(reader, writer, ws: RawWebSocket, label,
log.debug("[%s] tcp->ws ended: %s", label, e)
async def ws_to_tcp():
nonlocal down_bytes, down_packets
nonlocal down_bytes, down_packets, last_recv_time
try:
while True:
data = await ws.recv()
if data is None:
break
last_recv_time = asyncio.get_event_loop().time()
n = len(data)
_stats.bytes_down += n
down_bytes += n
down_packets += 1
writer.write(data)
# drain only when kernel buffer is filling up
buf = writer.transport.get_write_buffer_size()
if buf > _SEND_BUF:
await writer.drain()
await writer.drain()
except (asyncio.CancelledError, ConnectionError, OSError):
return
except Exception as e:
log.debug("[%s] ws->tcp ended: %s", label, e)
async def ws_keepalive():
try:
while not ws._closed:
await asyncio.sleep(2)
idle = asyncio.get_event_loop().time() - last_recv_time
if idle >= 2 and not ws._closed:
try:
ws.writer.write(
ws._build_frame(ws.OP_PING, b'', mask=True))
await ws.writer.drain()
log.debug("[%s] %s WS PING (idle %.1fs)",
label, dc_tag, idle)
except Exception:
break
except asyncio.CancelledError:
pass
ka_task = asyncio.create_task(ws_keepalive())
tasks = [asyncio.create_task(tcp_to_ws()),
asyncio.create_task(ws_to_tcp())]
try:
await asyncio.wait(tasks, return_when=asyncio.FIRST_COMPLETED)
finally:
ka_task.cancel()
for t in tasks:
t.cancel()
for t in tasks: