def handle(self):
try:
data = self.request[0]
clientAddr = self.client_address;
self.logger.debug("UDP packet from {0}:{1}, length {2}".format(clientAddr[0], clientAddr[1], len(data)))
self.logger.debug("message hex : %s", binascii.hexlify(data))
if data[0:4] == "IOT\xff":
self.logger.debug("heartbeat packet - ignoring")
elif data[0:4] == "IOT\0" and len(data)>=88 and ((len(data)-72)%16) == 0:
self.handleIotPacket(data, clientAddr)
else:
self.logger.warning("unknown packet - ignoring")
except Exception as e:
self.logger.exception(e)
except:
self.logger.error("error on handling incomming packet: {0} ".format(sys.exc_info()[0]))
python类error()的实例源码
def recv(self, *args, **kwargs):
try:
data = self.connection.recv(*args, **kwargs)
except OpenSSL.SSL.SysCallError as e:
if self.suppress_ragged_eofs and e.args == (-1, 'Unexpected EOF'):
return b''
else:
raise SocketError(str(e))
except OpenSSL.SSL.ZeroReturnError as e:
if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
return b''
else:
raise
except OpenSSL.SSL.WantReadError:
rd = util.wait_for_read(self.socket, self.socket.gettimeout())
if not rd:
raise timeout('The read operation timed out')
else:
return self.recv(*args, **kwargs)
else:
return data
def recv_into(self, *args, **kwargs):
try:
return self.connection.recv_into(*args, **kwargs)
except OpenSSL.SSL.SysCallError as e:
if self.suppress_ragged_eofs and e.args == (-1, 'Unexpected EOF'):
return 0
else:
raise SocketError(str(e))
except OpenSSL.SSL.ZeroReturnError as e:
if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
return 0
else:
raise
except OpenSSL.SSL.WantReadError:
rd = util.wait_for_read(self.socket, self.socket.gettimeout())
if not rd:
raise timeout('The read operation timed out')
else:
return self.recv_into(*args, **kwargs)
def unregister(self, fileobj):
""" Unregister a file object from being monitored. """
try:
key = self._fd_to_key.pop(self._fileobj_lookup(fileobj))
except KeyError:
raise KeyError("{0!r} is not registered".format(fileobj))
# Getting the fileno of a closed socket on Windows errors with EBADF.
except socket.error as e: # Platform-specific: Windows.
if e.errno != errno.EBADF:
raise
else:
for key in self._fd_to_key.values():
if key.fileobj is fileobj:
self._fd_to_key.pop(key.fd)
break
else:
raise KeyError("{0!r} is not registered".format(fileobj))
return key
def recv(self, *args, **kwargs):
try:
data = self.connection.recv(*args, **kwargs)
except OpenSSL.SSL.SysCallError as e:
if self.suppress_ragged_eofs and e.args == (-1, 'Unexpected EOF'):
return b''
else:
raise SocketError(str(e))
except OpenSSL.SSL.ZeroReturnError as e:
if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
return b''
else:
raise
except OpenSSL.SSL.WantReadError:
rd, wd, ed = select.select(
[self.socket], [], [], self.socket.gettimeout())
if not rd:
raise timeout('The read operation timed out')
else:
return self.recv(*args, **kwargs)
else:
return data
def recv_into(self, *args, **kwargs):
try:
return self.connection.recv_into(*args, **kwargs)
except OpenSSL.SSL.SysCallError as e:
if self.suppress_ragged_eofs and e.args == (-1, 'Unexpected EOF'):
return 0
else:
raise SocketError(str(e))
except OpenSSL.SSL.ZeroReturnError as e:
if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
return 0
else:
raise
except OpenSSL.SSL.WantReadError:
rd, wd, ed = select.select(
[self.socket], [], [], self.socket.gettimeout())
if not rd:
raise timeout('The read operation timed out')
else:
return self.recv_into(*args, **kwargs)
def is_valid_cidr(string_network):
"""
Very simple check of the cidr format in no_proxy variable.
:rtype: bool
"""
if string_network.count('/') == 1:
try:
mask = int(string_network.split('/')[1])
except ValueError:
return False
if mask < 1 or mask > 32:
return False
try:
socket.inet_aton(string_network.split('/')[0])
except socket.error:
return False
else:
return False
return True
def is_valid_cidr(string_network):
"""
Very simple check of the cidr format in no_proxy variable.
:rtype: bool
"""
if string_network.count('/') == 1:
try:
mask = int(string_network.split('/')[1])
except ValueError:
return False
if mask < 1 or mask > 32:
return False
try:
socket.inet_aton(string_network.split('/')[0])
except socket.error:
return False
else:
return False
return True
def search_machine(self, callback=None):
uri = self._base_url + self.version_prefix + '/machines'
req = HTTPRequest(uri, self._MGET, request_timeout=self.read_timeout,
follow_redirects=self.allow_redirect, )
response_future = self.http.fetch(req, callback=lambda result: result)
def _callback(fut):
exc = fut.exc_info()
if exc:
if not isinstance(exc[1], etcdexcept.EtcdException):
# We can't get the list of machines, if one server is in the
# machines cache, try on it
_log.error("Failed to get list of machines from %s%s: %r and retry it.",
uri, self.version_prefix, exc)
if self._machines_cache:
self._base_url = self._machines_cache.pop(0)
_log.debug("Retrying on %s", self._base_url)
# Call myself
self.ioloop.add_future(self.search_machine(), _callback)
return
else:
raise etcdexcept.EtcdException("Could not get the list of servers, "
"maybe you provided the wrong "
"host(s) to connect to?")
else:
response = fut.result()
machines = [
node.strip() for node in
self._handle_server_response(response).body.decode('utf-8').split(',')
]
_log.debug("Retrieved list of machines: %s", machines)
self._machines_cache = machines
if self._base_url not in self._machines_cache:
self._base_url = self._choice_machine()
callback(fut.result())
self.ioloop.add_future(response_future, _callback)
def _check_cluster_id(self, response):
cluster_id = response.headers.get("x-etcd-cluster-id")
if not cluster_id:
_log.warning("etcd response did not contain a cluster ID")
return
id_changed = (self.expected_cluster_id and
cluster_id != self.expected_cluster_id)
# Update the ID so we only raise the exception once.
old_expected_cluster_id = self.expected_cluster_id
self.expected_cluster_id = cluster_id
if id_changed:
# Defensive: clear the pool so that we connect afresh next
# time.
self._base_url = self._choice_machine()
_log.error(
'The UUID of the cluster changed from {} to '
'{}.'.format(old_expected_cluster_id, cluster_id))
def send_packed_command(self, command):
"Send an already packed command to the Redis server"
if not self._sock:
self.connect()
try:
if isinstance(command, str):
command = [command]
for item in command:
self._sock.sendall(item)
except socket.timeout:
self.disconnect()
raise TimeoutError("Timeout writing to socket")
except socket.error:
e = sys.exc_info()[1]
self.disconnect()
if len(e.args) == 1:
errno, errmsg = 'UNKNOWN', e.args[0]
else:
errno = e.args[0]
errmsg = e.args[1]
raise ConnectionError("Error %s while writing to socket. %s." %
(errno, errmsg))
except:
self.disconnect()
raise
def _handle_request_noblock(self):
"""Handle one request, without blocking.
I assume that select.select has returned that the socket is
readable before this function was called, so there should be
no risk of blocking in get_request().
"""
try:
request, client_address = self.get_request()
except socket.error:
return
if self.verify_request(request, client_address):
try:
self.process_request(request, client_address)
except:
self.handle_error(request, client_address)
self.shutdown_request(request)
def shutdown_request(self, request):
"""Called to shutdown and close an individual request."""
try:
#explicitly shutdown. socket.close() merely releases
#the socket and waits for GC to perform the actual close.
request.shutdown(socket.SHUT_WR)
except socket.error:
pass #some platforms may raise ENOTCONN here
self.close_request(request)
def xatom(self, name, *args):
"""Allow simple extension commands
notified by server in CAPABILITY response.
Assumes command is legal in current state.
(typ, [data]) = <instance>.xatom(name, arg, ...)
Returns response appropriate to extension command `name'.
"""
name = name.upper()
#if not name in self.capabilities: # Let the server decide!
# raise self.error('unknown extension command: %s' % name)
if not name in Commands:
Commands[name] = (self.state,)
return self._simple_command(name, *args)
# Private methods
def _get_line(self):
line = self.readline()
if not line:
raise self.abort('socket error: EOF')
# Protocol mandates all lines terminated by CRLF
if not line.endswith('\r\n'):
raise self.abort('socket error: unterminated line')
line = line[:-2]
if __debug__:
if self.debug >= 4:
self._mesg('< %s' % line)
else:
self._log('< %s' % line)
return line
def connect(self, host='localhost', port=0):
"""Connect to the LMTP daemon, on either a Unix or a TCP socket."""
if host[0] != '/':
return SMTP.connect(self, host, port)
# Handle Unix-domain sockets.
try:
self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
self.sock.connect(host)
except socket.error, msg:
if self.debuglevel > 0:
print>>stderr, 'connect fail:', host
if self.sock:
self.sock.close()
self.sock = None
raise socket.error, msg
(code, msg) = self.getreply()
if self.debuglevel > 0:
print>>stderr, "connect:", msg
return (code, msg)
# Test the sendmail method, which tests most of the others.
# Note: This always sends to localhost.
def _real_connect(self, addr, return_errno):
# Here we assume that the socket is client-side, and not
# connected at the time of the call. We connect it, then wrap it.
if self._connected:
raise ValueError("attempt to connect already-connected SSLSocket!")
self._sslobj = _ssl.sslwrap(self._sock, False, self.keyfile, self.certfile,
self.cert_reqs, self.ssl_version,
self.ca_certs, self.ciphers)
try:
socket.connect(self, addr)
if self.do_handshake_on_connect:
self.do_handshake()
except socket_error as e:
if return_errno:
return e.errno
else:
self._sslobj = None
raise e
self._connected = True
return 0
def sslwrap_simple(sock, keyfile=None, certfile=None):
"""A replacement for the old socket.ssl function. Designed
for compability with Python 2.5 and earlier. Will disappear in
Python 3.0."""
if hasattr(sock, "_sock"):
sock = sock._sock
ssl_sock = _ssl.sslwrap(sock, 0, keyfile, certfile, CERT_NONE,
PROTOCOL_SSLv23, None)
try:
sock.getpeername()
except socket_error:
# no, no connection yet
pass
else:
# yes, do the handshake
ssl_sock.do_handshake()
return ssl_sock
def error(self, proto, *args):
if proto in ('http', 'https'):
# XXX http[s] protocols are special-cased
dict = self.handle_error['http'] # https is not different than http
proto = args[2] # YUCK!
meth_name = 'http_error_%s' % proto
http_err = 1
orig_args = args
else:
dict = self.handle_error
meth_name = proto + '_error'
http_err = 0
args = (dict, proto, meth_name) + args
result = self._call_chain(*args)
if result:
return result
if http_err:
args = (dict, 'default', 'http_error_default') + orig_args
return self._call_chain(*args)
# XXX probably also want an abstract factory that knows when it makes
# sense to skip a superclass in favor of a subclass and when it might
# make sense to include both
def __init__(self, host, port):
"""
Initializes the handler with a specific host address and port.
The attribute 'closeOnError' is set to 1 - which means that if
a socket error occurs, the socket is silently closed and then
reopened on the next logging call.
"""
logging.Handler.__init__(self)
self.host = host
self.port = port
self.sock = None
self.closeOnError = 0
self.retryTime = None
#
# Exponential backoff parameters.
#
self.retryStart = 1.0
self.retryMax = 30.0
self.retryFactor = 2.0
