def _accept_connection(self, protocol_factory, sock,
sslcontext=None, server=None):
try:
conn, addr = wrap_error(sock.accept())
conn.setblocking(False)
except (BlockingIOError, InterruptedError, ConnectionAbortedError):
pass # False alarm.
except OSError as exc:
# There's nowhere to send the error, so just log it.
# TODO: Someone will want an error handler for this.
if exc.errno in (errno.EMFILE, errno.ENFILE,
errno.ENOBUFS, errno.ENOMEM):
# Some platforms (e.g. Linux keep reporting the FD as
# ready, so we remove the read handler temporarily.
# We'll try again in a while.
logger.exception('Accept out of system resource (%s)', exc)
self.remove_reader(sock.fileno())
self.call_later(constants.ACCEPT_RETRY_DELAY,
self._start_serving,
protocol_factory, sock, sslcontext, server)
else:
raise # The event loop will catch, log and ignore it.
else:
if sslcontext:
self._make_ssl_transport(
conn, protocol_factory(), sslcontext, None,
server_side=True, extra={'peername': addr}, server=server)
else:
self._make_socket_transport(
conn, protocol_factory(), extra={'peername': addr},
server=server)
def _maybe_resume_protocol(self):
if (self._protocol_paused and
self.get_write_buffer_size() <= self._low_water):
self._protocol_paused = False
try:
self._protocol.resume_writing()
except Exception:
logger.exception('resume_writing() failed')
def _maybe_pause_protocol(self):
size = self.get_write_buffer_size()
if size <= self._high_water:
return
if not self._protocol_paused:
self._protocol_paused = True
try:
self._protocol.pause_writing()
except Exception:
logger.exception('pause_writing() failed')
def _fatal_error(self, exc):
# should be called by exception handler only
if not isinstance(exc, (BrokenPipeError, ConnectionResetError)):
logger.exception('Fatal error for %s', self)
self._close(exc)
def _fatal_error(self, exc):
# should be called by exception handler only
if not (isinstance(exc, OSError) and exc.errno == errno.EIO):
logger.exception('Fatal error for %s', self)
self._close(exc)
def _fatal_error(self, exc):
# Should be called from exception handler only.
if not isinstance(exc, (BrokenPipeError, ConnectionResetError)):
logger.exception('Fatal error for %s', self)
self._force_close(exc)
def _fatal_error(self, exc):
# should be called by exception handler only
if not (isinstance(exc, OSError) and exc.errno == errno.EIO):
logger.exception('Fatal error for %s', self)
self._close(exc)
