def _socketpair_compat():
"""TCP/IP socketpair including Windows support"""
listensock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_IP)
listensock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
listensock.bind(("127.0.0.1", 0))
listensock.listen(1)
iface, port = listensock.getsockname()
sock1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_IP)
sock1.setblocking(0)
try:
sock1.connect(("127.0.0.1", port))
except socket.error as err:
if err.errno != errno.EINPROGRESS and err.errno != errno.EWOULDBLOCK and err.errno != EAGAIN:
raise
sock2, address = listensock.accept()
sock2.setblocking(0)
listensock.close()
return (sock1, sock2)
python类EWOULDBLOCK的实例源码
def write_to_server_socket(self, data, addr):
uncomplete = False
retry = 0
try:
self._server_socket.sendto(data, addr)
data = None
while self._data_to_write_to_server_socket:
data_buf = self._data_to_write_to_server_socket[0]
retry = data_buf[1] + 1
del self._data_to_write_to_server_socket[0]
data, addr = data_buf[0]
self._server_socket.sendto(data, addr)
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
uncomplete = True
if error_no in (errno.EWOULDBLOCK,):
pass
else:
shell.print_exception(e)
return False
#if uncomplete and data is not None and retry < 3:
# self._data_to_write_to_server_socket.append([(data, addr), retry])
#'''
def _on_local_read(self):
# handle all local read events and dispatch them to methods for
# each stage
self._update_activity()
if not self._local_sock:
return
data = None
try:
data = self._local_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
if not data:
self.destroy()
return
if not data:
return
self._server.server_transfer_ul += len(data)
#TODO ============================================================
if self._stage == STAGE_STREAM:
self._write_to_sock(data, self._remote_sock)
return
def test_timeout_connect_ex(self):
# Issue #12065: on a timeout, connect_ex() should return the original
# errno (mimicking the behaviour of non-SSL sockets).
with support.transient_internet("svn.python.org"):
s = ssl.wrap_socket(socket.socket(socket.AF_INET),
cert_reqs=ssl.CERT_REQUIRED,
ca_certs=SVN_PYTHON_ORG_ROOT_CERT,
do_handshake_on_connect=False)
try:
s.settimeout(0.0000001)
rc = s.connect_ex(('svn.python.org', 443))
if rc == 0:
self.skipTest("svn.python.org responded too quickly")
self.assertIn(rc, (errno.EAGAIN, errno.EWOULDBLOCK))
finally:
s.close()
def reset_input_buffer(self):
"""Clear input buffer, discarding all that is in the buffer."""
if not self.is_open:
raise portNotOpenError
# just use recv to remove input, while there is some
ready = True
while ready:
ready, _, _ = select.select([self._socket], [], [], 0)
try:
self._socket.recv(4096)
except OSError as e:
# this is for Python 3.x where select.error is a subclass of
# OSError ignore BlockingIOErrors and EINTR. other errors are shown
# https://www.python.org/dev/peps/pep-0475.
if e.errno not in (errno.EAGAIN, errno.EALREADY, errno.EWOULDBLOCK, errno.EINPROGRESS, errno.EINTR):
raise SerialException('read failed: {}'.format(e))
except (select.error, socket.error) as e:
# this is for Python 2.x
# ignore BlockingIOErrors and EINTR. all errors are shown
# see also http://www.python.org/dev/peps/pep-3151/#select
if e[0] not in (errno.EAGAIN, errno.EALREADY, errno.EWOULDBLOCK, errno.EINPROGRESS, errno.EINTR):
raise SerialException('read failed: {}'.format(e))
def run_for_multiple(self, timeout):
while self.alive:
self.notify()
try:
ready = self.wait(timeout)
except StopWaiting:
return
if ready is not None:
for listener in ready:
if listener == self.PIPE[0]:
continue
try:
self.accept(listener)
except EnvironmentError as e:
if e.errno not in (errno.EAGAIN, errno.ECONNABORTED,
errno.EWOULDBLOCK):
raise
if not self.is_parent_alive():
return
def run_for_multiple(self, timeout):
while self.alive:
self.notify()
try:
ready = self.wait(timeout)
except StopWaiting:
return
if ready is not None:
for listener in ready:
if listener == self.PIPE[0]:
continue
try:
self.accept(listener)
except EnvironmentError as e:
if e.errno not in (errno.EAGAIN, errno.ECONNABORTED,
errno.EWOULDBLOCK):
raise
if not self.is_parent_alive():
return
def __init__(self, head = HEAD_WORD_LSB):
self.sock = None # socket object
self.send_buf = '' # send buffer
self.recv_buf = '' # recv buffer
self.state = NET_STATE_STOP
self.errd = [ errno.EINPROGRESS, errno.EALREADY, errno.EWOULDBLOCK ]
self.conn = ( errno.EISCONN, 10057, 10053 )
self.errc = 0
self.headmsk = False
self.headraw = False
self.__head_init(head)
self.crypts = None
self.cryptr = None
self.ipv6 = False
self.eintr = ()
if 'EINTR' in errno.__dict__:
self.eintr = (errno.__dict__['EINTR'],)
if 'WSAEWOULDBLOCK' in errno.__dict__:
self.errd.append(errno.WSAEWOULDBLOCK)
self.errd = tuple(self.errd)
self.block = False
def run_for_multiple(self, timeout):
while self.alive:
self.notify()
try:
ready = self.wait(timeout)
except StopWaiting:
return
if ready is not None:
for listener in ready:
try:
self.accept(listener)
except socket.error as e:
if e.args[0] not in (errno.EAGAIN, errno.ECONNABORTED,
errno.EWOULDBLOCK):
raise
if not self.is_parent_alive():
return
def test_timeout_connect_ex(self):
# Issue #12065: on a timeout, connect_ex() should return the original
# errno (mimicking the behaviour of non-SSL sockets).
with support.transient_internet(REMOTE_HOST):
s = ssl.wrap_socket(socket.socket(socket.AF_INET),
cert_reqs=ssl.CERT_REQUIRED,
ca_certs=REMOTE_ROOT_CERT,
do_handshake_on_connect=False)
try:
s.settimeout(0.0000001)
rc = s.connect_ex((REMOTE_HOST, 443))
if rc == 0:
self.skipTest("REMOTE_HOST responded too quickly")
self.assertIn(rc, (errno.EAGAIN, errno.EWOULDBLOCK))
finally:
s.close()
def test_connect_ex_error(self):
with support.transient_internet(REMOTE_HOST):
s = ssl.wrap_socket(socket.socket(socket.AF_INET),
cert_reqs=ssl.CERT_REQUIRED,
ca_certs=REMOTE_ROOT_CERT)
try:
rc = s.connect_ex((REMOTE_HOST, 444))
# Issue #19919: Windows machines or VMs hosted on Windows
# machines sometimes return EWOULDBLOCK.
errors = (
errno.ECONNREFUSED, errno.EHOSTUNREACH, errno.ETIMEDOUT,
errno.EWOULDBLOCK,
)
self.assertIn(rc, errors)
finally:
s.close()
def run(self):
self.before_actions()
# Make non-blocking so self.stop has effect
self.sock.setblocking(0)
while not self.stopped:
try:
self.action()
except socket.error as error:
if error.args[0] == errno.EWOULDBLOCK:
# No data available, wait a bit
time.sleep(0.2)
continue
# Might be connection error
self.stop()
self.on_error()
self.after_actions()
self.sock.close()
def test_timeout_connect_ex(self):
# Issue #12065: on a timeout, connect_ex() should return the original
# errno (mimicking the behaviour of non-SSL sockets).
with support.transient_internet(REMOTE_HOST):
s = ssl.wrap_socket(socket.socket(socket.AF_INET),
cert_reqs=ssl.CERT_REQUIRED,
ca_certs=REMOTE_ROOT_CERT,
do_handshake_on_connect=False)
try:
s.settimeout(0.0000001)
rc = s.connect_ex((REMOTE_HOST, 443))
if rc == 0:
self.skipTest("REMOTE_HOST responded too quickly")
self.assertIn(rc, (errno.EAGAIN, errno.EWOULDBLOCK))
finally:
s.close()
def test_connect_ex_error(self):
with support.transient_internet(REMOTE_HOST):
s = ssl.wrap_socket(socket.socket(socket.AF_INET),
cert_reqs=ssl.CERT_REQUIRED,
ca_certs=REMOTE_ROOT_CERT)
try:
rc = s.connect_ex((REMOTE_HOST, 444))
# Issue #19919: Windows machines or VMs hosted on Windows
# machines sometimes return EWOULDBLOCK.
errors = (
errno.ECONNREFUSED, errno.EHOSTUNREACH, errno.ETIMEDOUT,
errno.EWOULDBLOCK,
)
self.assertIn(rc, errors)
finally:
s.close()
def _socketpair_compat():
"""TCP/IP socketpair including Windows support"""
listensock = socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_IP)
listensock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
listensock.bind(("127.0.0.1", 0))
listensock.listen(1)
iface, port = listensock.getsockname()
sock1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_IP)
sock1.setblocking(0)
try:
sock1.connect(("127.0.0.1", port))
except socket.error as err:
if err.errno != errno.EINPROGRESS and err.errno != errno.EWOULDBLOCK and err.errno != EAGAIN:
raise
sock2, address = listensock.accept()
sock2.setblocking(0)
listensock.close()
return (sock1, sock2)
def run_for_multiple(self, timeout):
while self.alive:
self.notify()
try:
ready = self.wait(timeout)
except StopWaiting:
return
if ready is not None:
for listener in ready:
if listener == self.PIPE[0]:
continue
try:
self.accept(listener)
except EnvironmentError as e:
if e.errno not in (errno.EAGAIN, errno.ECONNABORTED,
errno.EWOULDBLOCK):
raise
if not self.is_parent_alive():
return
def doRead(self):
"""Calls self.protocol.dataReceived with all available data.
This reads up to self.bufferSize bytes of data from its socket, then
calls self.dataReceived(data) to process it. If the connection is not
lost through an error in the physical recv(), this function will return
the result of the dataReceived call.
"""
try:
data = self.socket.recv(self.bufferSize)
except socket.error, se:
if se.args[0] == EWOULDBLOCK:
return
else:
return main.CONNECTION_LOST
if not data:
return main.CONNECTION_DONE
return self.protocol.dataReceived(data)
def writeSomeData(self, data):
"""Connection.writeSomeData(data) -> #of bytes written | CONNECTION_LOST
This writes as much data as possible to the socket and returns either
the number of bytes read (which is positive) or a connection error code
(which is negative)
"""
try:
# Limit length of buffer to try to send, because some OSes are too
# stupid to do so themselves (ahem windows)
return self.socket.send(buffer(data, 0, self.SEND_LIMIT))
except socket.error, se:
if se.args[0] == EINTR:
return self.writeSomeData(data)
elif se.args[0] in (EWOULDBLOCK, ENOBUFS):
return 0
else:
return main.CONNECTION_LOST
def doRead(self):
"""Called when my socket is ready for reading."""
read = 0
while read < self.maxThroughput:
try:
data, addr = self.socket.recvfrom(self.maxPacketSize)
read += len(data)
self.protocol.datagramReceived(data)
except socket.error, se:
no = se.args[0]
if no in (EAGAIN, EINTR, EWOULDBLOCK):
return
if (no == ECONNREFUSED) or (platformType == "win32" and no == WSAECONNRESET):
self.protocol.connectionRefused()
else:
raise
except:
log.deferr()
def _on_local_read(self):
# handle all local read events and dispatch them to methods for
# each stage
self._update_activity()
if not self._local_sock:
return
data = None
try:
data = self._local_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
if not data:
self.destroy()
return
if not data:
return
self._server.server_transfer_ul += len(data)
#TODO ============================================================
if self._stage == STAGE_STREAM:
self._write_to_sock(data, self._remote_sock)
return
