Python 如何设置tornado IOStream的超时?
如何设置tornado IOStream的超时 我已尝试通过以下方式构建IOStream:Python 如何设置tornado IOStream的超时?,python,sockets,tornado,Python,Sockets,Tornado,如何设置tornado IOStream的超时 我已尝试通过以下方式构建IOStream: sock = socket.socket() sock.settimeout(5) self.stream = tornado.iostream.IOStream(sock) 但是当我调用stream.read_bytes()时,它仍然会一直等待。您不能使用socket.settimeout(),因为它是为阻止IO而设计的,而Tornado提供了非阻止IO Tornado高度面向Web和HTTP IO,
sock = socket.socket()
sock.settimeout(5)
self.stream = tornado.iostream.IOStream(sock)
但是当我调用stream.read_bytes()时,它仍然会一直等待。您不能使用
socket.settimeout()
,因为它是为阻止IO而设计的,而Tornado提供了非阻止IO
Tornado高度面向Web和HTTP IO,它不允许在没有极度痛苦的情况下进行低级网络编程(IOStream的来源非常可怕)
设置套接字超时的最佳方法是使用select.select()
,select.poll()
,等等,但是将这种方法与Tornado集成在一起是一种痛苦
我已经通过使用gen.with\u timeout
和一个清除流状态的脏黑客的组合来执行超时读取
from tornado import gen
from tornado.ioloop import IOLoop
from tornado.tcpclient import TCPClient
timeout = 5
io_loop = IOLoop.current()
factory = TCPClient(io_loop=io_loop)
@gen.coroutine
def run():
stream = yield factory.connect('127.0.0.1', 1234)
try:
future = stream.read_bytes(128)
data = yield gen.with_timeout(
timeout=io_loop.time() + timeout,
future=future,
io_loop=io_loop,
)
except gen.TimeoutError:
# A dirty hack to cancel reading and to clear state of the stream, so
# stream will be available for reading in future
io_loop.remove_handler(stream.socket)
state = (stream._state & ~io_loop.READ)
stream._state = None
stream._read_callback = None
stream._read_future = None
stream._add_io_state(state)
祝你好运