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[3.6] bpo-32015: Asyncio looping during simultaneously socket read/write an… (GH-4386) (#4393) 

* bpo-32015: Asyncio cycling during simultaneously socket read/write and reconnection

* Tests fix

* Tests fix

* News add

* Add new unit tests.
(cherry picked from commit e1d62e0b7c)
This commit is contained in:
Andrew Svetlov 2017-11-14 12:14:51 +02:00 committed by GitHub
parent 58cbae2293
commit cc0961c517
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 73 additions and 32 deletions
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25
Lib/asyncio/selector_events.py
View File

@ -363,25 +363,25 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
if self._debug and sock.gettimeout() != 0:
raise ValueError("the socket must be non-blocking")
fut = self.create_future()
self._sock_recv(fut, False, sock, n)
self._sock_recv(fut, None, sock, n)
return fut
def _sock_recv(self, fut, registered, sock, n):
def _sock_recv(self, fut, registered_fd, sock, n):
# _sock_recv() can add itself as an I/O callback if the operation can't
# be done immediately. Don't use it directly, call sock_recv().
fd = sock.fileno()
if registered:
if registered_fd is not None:
# Remove the callback early. It should be rare that the
# selector says the fd is ready but the call still returns
# EAGAIN, and I am willing to take a hit in that case in
# order to simplify the common case.
self.remove_reader(fd)
self.remove_reader(registered_fd)
if fut.cancelled():
return
try:
data = sock.recv(n)
except (BlockingIOError, InterruptedError):
self.add_reader(fd, self._sock_recv, fut, True, sock, n)
fd = sock.fileno()
self.add_reader(fd, self._sock_recv, fut, fd, sock, n)
except Exception as exc:
fut.set_exception(exc)
else:
@ -402,16 +402,14 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
raise ValueError("the socket must be non-blocking")
fut = self.create_future()
if data:
self._sock_sendall(fut, False, sock, data)
self._sock_sendall(fut, None, sock, data)
else:
fut.set_result(None)
return fut
def _sock_sendall(self, fut, registered, sock, data):
fd = sock.fileno()
if registered:
self.remove_writer(fd)
def _sock_sendall(self, fut, registered_fd, sock, data):
if registered_fd is not None:
self.remove_writer(registered_fd)
if fut.cancelled():
return
@ -428,7 +426,8 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
else:
if n:
data = data[n:]
self.add_writer(fd, self._sock_sendall, fut, True, sock, data)
fd = sock.fileno()
self.add_writer(fd, self._sock_sendall, fut, fd, sock, data)
@coroutine
def sock_connect(self, sock, address):

78
Lib/test/test_asyncio/test_selector_events.py
View File

@ -182,7 +182,27 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
f = self.loop.sock_recv(sock, 1024)
self.assertIsInstance(f, asyncio.Future)
self.loop._sock_recv.assert_called_with(f, False, sock, 1024)
self.loop._sock_recv.assert_called_with(f, None, sock, 1024)
def test_sock_recv_reconnection(self):
sock = mock.Mock()
sock.fileno.return_value = 10
sock.recv.side_effect = BlockingIOError
self.loop.add_reader = mock.Mock()
self.loop.remove_reader = mock.Mock()
fut = self.loop.sock_recv(sock, 1024)
callback = self.loop.add_reader.call_args[0][1]
params = self.loop.add_reader.call_args[0][2:]
# emulate the old socket has closed, but the new one has
# the same fileno, so callback is called with old (closed) socket
sock.fileno.return_value = -1
sock.recv.side_effect = OSError(9)
callback(*params)
self.assertIsInstance(fut.exception(), OSError)
self.assertEqual((10,), self.loop.remove_reader.call_args[0])
def test__sock_recv_canceled_fut(self):
sock = mock.Mock()
@ -190,7 +210,7 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
f = asyncio.Future(loop=self.loop)
f.cancel()
self.loop._sock_recv(f, False, sock, 1024)
self.loop._sock_recv(f, None, sock, 1024)
self.assertFalse(sock.recv.called)
def test__sock_recv_unregister(self):
@ -201,7 +221,7 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
f.cancel()
self.loop.remove_reader = mock.Mock()
self.loop._sock_recv(f, True, sock, 1024)
self.loop._sock_recv(f, 10, sock, 1024)
self.assertEqual((10,), self.loop.remove_reader.call_args[0])
def test__sock_recv_tryagain(self):
@ -211,8 +231,8 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
sock.recv.side_effect = BlockingIOError
self.loop.add_reader = mock.Mock()
self.loop._sock_recv(f, False, sock, 1024)
self.assertEqual((10, self.loop._sock_recv, f, True, sock, 1024),
self.loop._sock_recv(f, None, sock, 1024)
self.assertEqual((10, self.loop._sock_recv, f, 10, sock, 1024),
self.loop.add_reader.call_args[0])
def test__sock_recv_exception(self):
@ -221,7 +241,7 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
sock.fileno.return_value = 10
err = sock.recv.side_effect = OSError()
self.loop._sock_recv(f, False, sock, 1024)
self.loop._sock_recv(f, None, sock, 1024)
self.assertIs(err, f.exception())
def test_sock_sendall(self):
@ -231,7 +251,7 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
f = self.loop.sock_sendall(sock, b'data')
self.assertIsInstance(f, asyncio.Future)
self.assertEqual(
(f, False, sock, b'data'),
(f, None, sock, b'data'),
self.loop._sock_sendall.call_args[0])
def test_sock_sendall_nodata(self):
@ -244,13 +264,33 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
self.assertIsNone(f.result())
self.assertFalse(self.loop._sock_sendall.called)
def test_sock_sendall_reconnection(self):
sock = mock.Mock()
sock.fileno.return_value = 10
sock.send.side_effect = BlockingIOError
self.loop.add_writer = mock.Mock()
self.loop.remove_writer = mock.Mock()
fut = self.loop.sock_sendall(sock, b'data')
callback = self.loop.add_writer.call_args[0][1]
params = self.loop.add_writer.call_args[0][2:]
# emulate the old socket has closed, but the new one has
# the same fileno, so callback is called with old (closed) socket
sock.fileno.return_value = -1
sock.send.side_effect = OSError(9)
callback(*params)
self.assertIsInstance(fut.exception(), OSError)
self.assertEqual((10,), self.loop.remove_writer.call_args[0])
def test__sock_sendall_canceled_fut(self):
sock = mock.Mock()
f = asyncio.Future(loop=self.loop)
f.cancel()
self.loop._sock_sendall(f, False, sock, b'data')
self.loop._sock_sendall(f, None, sock, b'data')
self.assertFalse(sock.send.called)
def test__sock_sendall_unregister(self):
@ -261,7 +301,7 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
f.cancel()
self.loop.remove_writer = mock.Mock()
self.loop._sock_sendall(f, True, sock, b'data')
self.loop._sock_sendall(f, 10, sock, b'data')
self.assertEqual((10,), self.loop.remove_writer.call_args[0])
def test__sock_sendall_tryagain(self):
@ -271,9 +311,9 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
sock.send.side_effect = BlockingIOError
self.loop.add_writer = mock.Mock()
self.loop._sock_sendall(f, False, sock, b'data')
self.loop._sock_sendall(f, None, sock, b'data')
self.assertEqual(
(10, self.loop._sock_sendall, f, True, sock, b'data'),
(10, self.loop._sock_sendall, f, 10, sock, b'data'),
self.loop.add_writer.call_args[0])
def test__sock_sendall_interrupted(self):
@ -283,9 +323,9 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
sock.send.side_effect = InterruptedError
self.loop.add_writer = mock.Mock()
self.loop._sock_sendall(f, False, sock, b'data')
self.loop._sock_sendall(f, None, sock, b'data')
self.assertEqual(
(10, self.loop._sock_sendall, f, True, sock, b'data'),
(10, self.loop._sock_sendall, f, 10, sock, b'data'),
self.loop.add_writer.call_args[0])
def test__sock_sendall_exception(self):
@ -294,7 +334,7 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
sock.fileno.return_value = 10
err = sock.send.side_effect = OSError()
self.loop._sock_sendall(f, False, sock, b'data')
self.loop._sock_sendall(f, None, sock, b'data')
self.assertIs(f.exception(), err)
def test__sock_sendall(self):
@ -304,7 +344,7 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
sock.fileno.return_value = 10
sock.send.return_value = 4
self.loop._sock_sendall(f, False, sock, b'data')
self.loop._sock_sendall(f, None, sock, b'data')
self.assertTrue(f.done())
self.assertIsNone(f.result())
@ -316,10 +356,10 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
sock.send.return_value = 2
self.loop.add_writer = mock.Mock()
self.loop._sock_sendall(f, False, sock, b'data')
self.loop._sock_sendall(f, None, sock, b'data')
self.assertFalse(f.done())
self.assertEqual(
(10, self.loop._sock_sendall, f, True, sock, b'ta'),
(10, self.loop._sock_sendall, f, 10, sock, b'ta'),
self.loop.add_writer.call_args[0])
def test__sock_sendall_none(self):
@ -330,10 +370,10 @@ class BaseSelectorEventLoopTests(test_utils.TestCase):
sock.send.return_value = 0
self.loop.add_writer = mock.Mock()
self.loop._sock_sendall(f, False, sock, b'data')
self.loop._sock_sendall(f, None, sock, b'data')
self.assertFalse(f.done())
self.assertEqual(
(10, self.loop._sock_sendall, f, True, sock, b'data'),
(10, self.loop._sock_sendall, f, 10, sock, b'data'),
self.loop.add_writer.call_args[0])
def test_sock_connect_timeout(self):

2
Misc/NEWS.d/next/Library/2017-11-13-17-48-33.bpo-32015.4nqRTD.rst Normal file
View File

@ -0,0 +1,2 @@
Fixed the looping of asyncio in the case of reconnection the socket during
waiting async read/write from/to the socket.