假设 WebSocket 服务器暂时关闭,它会丢弃传入的数据包(而不是拒绝它们)
目前,连接尝试和
TimeoutError
之间大约需要 95 秒
我似乎找不到减少该窗口的方法(所以我可以尝试另一个 WebSocket 服务器)
这是我正在运行的演示代码:(刚刚摘自官方文档
#!/usr/bin/env python
import asyncio
import websockets
import os
import socket
import logging
logging.basicConfig(level=logging.INFO, format='%(asctime)s %(levelname)-8s [%(name)s.%(funcName)s:%(lineno)d]: %(message)s', datefmt='%m-%d %H:%M:%S', )
host = os.environ.get('SERVER_URL','localhost:9090')
self_id = os.environ.get('SELF_ID',socket.gethostname())
connect_url =f'ws://{host}/{self_id}'
logging.info(f'Connect to: {connect_url}')
async def hello(uri):
logging.info(f'Connecting to {uri}')
async with websockets.connect(uri, timeout=1, close_timeout=1) as websocket:
logging.info(f"Conected to {uri}")
async for message in websocket:
await websocket.send(message)
asyncio.get_event_loop().run_until_complete(
hello(connect_url))
您可以像这样使用 asyncio 的 wait_for() :
import websockets
import asyncio
from concurrent.futures import TimeoutError as ConnectionTimeoutError
# whatever url is your websocket server
url = 'ws://localhost:9090'
# timeout in seconds
timeout = 10
try:
# make connection attempt
connection = await asyncio.wait_for(websockets.connect(url), timeout)
except ConnectionTimeoutError as e:
# handle error
print('Error connecting.')
它将引发
<class 'concurrent.futures._base.TimeoutError'>
异常,可以使用 except ConnectionTimeoutError
块捕获。
在 python3.8 中,它会引发一个
TimeoutError
,可以用 except asyncio.exceptions.TimeoutError
块捕获。