def receiver(self):
"""
Parser that keeps trying to interpret bytes it is fed with as
incoming frames part of a message.
Control message are single frames only while data messages, like text
and binary, may be fragmented accross frames.
The way it works is by instanciating a framing.Frame object,
then running its parser generator which yields how much bytes
it requires to performs its task. The stream parser yields this value
to its caller and feeds the frame parser.
When the frame parser raises StopIteration, the stream parser
tries to make sense of the parsed frame. It dispatches the frame's bytes
to the most appropriate message type based on the frame's opcode.
Overall this makes the stream parser totally agonstic to
the data provider.
"""
utf8validator = Utf8Validator()
running = True
while running:
frame = Frame()
while True:
try:
bytes = (yield frame.parser.next())
if bytes is None:
raise InvalidBytesError()
frame.parser.send(bytes)
except StopIteration:
bytes = frame.body or ''
if frame.masking_key and bytes:
bytes = frame.unmask(bytes)
if frame.opcode == OPCODE_TEXT:
if self.message and not self.message.completed:
# We got a text frame before we completed the previous one
self.errors.append(CloseControlMessage(code=1002))
break
is_valid, _, _, _ = utf8validator.validate(bytes)
if is_valid or (not is_valid and frame.fin == 0):
m = TextMessage(bytes)
m.completed = (frame.fin == 1)
self.message = m
elif not is_valid and frame.fin == 1:
self.errors.append(CloseControlMessage(code=1007))
elif frame.opcode == OPCODE_BINARY:
m = BinaryMessage(bytes)
m.completed = (frame.fin == 1)
self.message = m
elif frame.opcode == OPCODE_CONTINUATION:
m = self.message
if m is None:
self.errors.append(CloseControlMessage(code=1002))
break
m.completed = (frame.fin == 1)
if m.opcode == OPCODE_TEXT:
is_valid, _, _, _ = utf8validator.validate(bytes)
if is_valid:
m.extend(bytes)
else:
self.errors.append(CloseControlMessage(code=1007))
#except UnicodeDecodeError:
# self.errors.append(CloseControlMessage(code=1007))
# break
else:
m.extend(bytes)
elif frame.opcode == OPCODE_CLOSE:
code = 1000
reason = ""
if len(bytes) == 0:
self.errors.append(CloseControlMessage(code=1000))
elif 1 < len(bytes) < 126:
code = struct.unpack("!H", str(bytes[0:2]))[0]
try:
code = int(code)
except TypeError:
code = 1002
reason = 'Invalid Closing Frame Code Type'
else:
# Those codes are reserved or plainly forbidden
if code < 1000 or code in [1004, 1005, 1006, 1012, 1013, 1014, 1015,
1016, 1100, 2000, 2999, 5000, 65536]:
code = 1002
reason = 'Invalid Closing Frame Code'
else:
if len(bytes) > 2:
try:
reason = frame.body[2:].decode("utf-8")
except UnicodeDecodeError:
code = 1007
reason = ''
self.closing = CloseControlMessage(code=code, reason=reason)
else:
self.errors.append(CloseControlMessage(code=1002))
elif frame.opcode == OPCODE_PING:
self.pings.append(PingControlMessage(bytes))
elif frame.opcode == OPCODE_PONG:
self.pongs.append(PongControlMessage(bytes))
else:
self.errors.append(CloseControlMessage(code=1003))
# When the frame's payload is empty, we must yield
# once more so that the caller is properly aligned
if not bytes:
yield 0
break
except ProtocolException:
self.errors.append(CloseControlMessage(code=1002))
except FrameTooLargeException:
self.errors.append(CloseControlMessage(code=1002))
except StreamClosed:
running = False
break
frame.parser.close()
utf8validator.reset()
utf8validator = None
def on_event(self, name, **data):
event = data
event['event'] = name
message = json.dumps(event, cls=models.ModelJSONEncoder)
cherrypy.engine.publish('websocket-broadcast', TextMessage(message))
def receiver(self):
"""
Parser that keeps trying to interpret bytes it is fed with as
incoming frames part of a message.
Control message are single frames only while data messages, like text
and binary, may be fragmented accross frames.
The way it works is by instanciating a :class:`wspy.framing.Frame` object,
then running its parser generator which yields how much bytes
it requires to performs its task. The stream parser yields this value
to its caller and feeds the frame parser.
When the frame parser raises :exc:`StopIteration`, the stream parser
tries to make sense of the parsed frame. It dispatches the frame's bytes
to the most appropriate message type based on the frame's opcode.
Overall this makes the stream parser totally agonstic to
the data provider.
"""
utf8validator = Utf8Validator()
running = True
frame = None
while running:
frame = Frame()
while 1:
try:
some_bytes = (yield next(frame.parser))
frame.parser.send(some_bytes)
except GeneratorExit:
running = False
break
except StopIteration:
frame._cleanup()
some_bytes = frame.body
# Let's avoid unmasking when there is no payload
if some_bytes:
if frame.masking_key and self.expect_masking:
some_bytes = frame.unmask(some_bytes)
elif not frame.masking_key and self.expect_masking:
msg = CloseControlMessage(code=1002, reason='Missing masking when expected')
self.errors.append(msg)
break
elif frame.masking_key and not self.expect_masking:
msg = CloseControlMessage(code=1002, reason='Masked when not expected')
self.errors.append(msg)
break
else:
# If we reach this stage, it's because
# the frame wasn't masked and we didn't expect
# it anyway. Therefore, on py2k, the bytes
# are actually a str object and can't be used
# in the utf8 validator as we need integers
# when we get each byte one by one.
# Our only solution here is to convert our
# string to a bytearray.
some_bytes = bytearray(some_bytes)
if frame.opcode == OPCODE_TEXT:
if self.message and not self.message.completed:
# We got a text frame before we completed the previous one
msg = CloseControlMessage(code=1002, reason='Received a new message before completing previous')
self.errors.append(msg)
break
m = TextMessage(some_bytes)
m.completed = (frame.fin == 1)
self.message = m
if some_bytes:
is_valid, end_on_code_point, _, _ = utf8validator.validate(some_bytes)
if not is_valid or (m.completed and not end_on_code_point):
self.errors.append(CloseControlMessage(code=1007, reason='Invalid UTF-8 bytes'))
break
elif frame.opcode == OPCODE_BINARY:
if self.message and not self.message.completed:
# We got a text frame before we completed the previous one
msg = CloseControlMessage(code=1002, reason='Received a new message before completing previous')
self.errors.append(msg)
break
m = BinaryMessage(some_bytes)
m.completed = (frame.fin == 1)
self.message = m
elif frame.opcode == OPCODE_CONTINUATION:
m = self.message
if m is None:
self.errors.append(CloseControlMessage(code=1002, reason='Message not started yet'))
break
m.extend(some_bytes)
m.completed = (frame.fin == 1)
if m.opcode == OPCODE_TEXT:
if some_bytes:
is_valid, end_on_code_point, _, _ = utf8validator.validate(some_bytes)
if not is_valid or (m.completed and not end_on_code_point):
self.errors.append(CloseControlMessage(code=1007, reason='Invalid UTF-8 bytes'))
break
elif frame.opcode == OPCODE_CLOSE:
code = 1000
reason = ""
if frame.payload_length == 0:
self.closing = CloseControlMessage(code=1000)
elif frame.payload_length == 1:
self.closing = CloseControlMessage(code=1002, reason='Payload has invalid length')
else:
try:
# at this stage, some_bytes have been unmasked
# so actually are held in a bytearray
code = int(unpack("!H", bytes(some_bytes[0:2]))[0])
except struct.error:
code = 1002
reason = 'Failed at decoding closing code'
else:
# Those codes are reserved or plainly forbidden
if code not in VALID_CLOSING_CODES and not (2999 < code < 5000):
reason = 'Invalid Closing Frame Code: %d' % code
code = 1002
elif frame.payload_length > 1:
reason = some_bytes[2:] if frame.masking_key else frame.body[2:]
if not py3k: reason = bytearray(reason)
is_valid, end_on_code_point, _, _ = utf8validator.validate(reason)
if not is_valid or not end_on_code_point:
self.errors.append(CloseControlMessage(code=1007, reason='Invalid UTF-8 bytes'))
break
reason = bytes(reason)
self.closing = CloseControlMessage(code=code, reason=reason)
elif frame.opcode == OPCODE_PING:
self.pings.append(PingControlMessage(some_bytes))
elif frame.opcode == OPCODE_PONG:
self.pongs.append(PongControlMessage(some_bytes))
else:
self.errors.append(CloseControlMessage(code=1003))
break
except ProtocolException:
self.errors.append(CloseControlMessage(code=1002))
break
except FrameTooLargeException:
self.errors.append(CloseControlMessage(code=1002, reason="Frame was too large"))
break
frame._cleanup()
frame.body = None
frame = None
if self.message is not None and self.message.completed:
utf8validator.reset()
utf8validator.reset()
utf8validator = None
self._cleanup()
def closed(
self,
code,
reason="A user left pysenteishon, seems the talk is too boring :("
):
cherrypy.engine.publish('/slides', TextMessage(reason))
def closed(self,
code,
reason="A client left the room without a proper explanation."):
cherrypy.engine.publish('websocket-broadcast', TextMessage(reason))
def receiver(self):
"""
Parser that keeps trying to interpret bytes it is fed with as
incoming frames part of a message.
Control message are single frames only while data messages, like text
and binary, may be fragmented accross frames.
The way it works is by instanciating a :class:`wspy.framing.Frame` object,
then running its parser generator which yields how much bytes
it requires to performs its task. The stream parser yields this value
to its caller and feeds the frame parser.
When the frame parser raises :exc:`StopIteration`, the stream parser
tries to make sense of the parsed frame. It dispatches the frame's bytes
to the most appropriate message type based on the frame's opcode.
Overall this makes the stream parser totally agonstic to
the data provider.
"""
utf8validator = Utf8Validator()
running = True
frame = None
while running:
frame = Frame()
while 1:
try:
bytes = (yield frame.parser.next())
frame.parser.send(bytes)
except StopIteration:
frame._cleanup()
bytes = frame.body or ''
# Let's avoid unmasking when there is no payload
if bytes:
if frame.masking_key and self.expect_masking:
bytes = frame.unmask(bytes)
elif not frame.masking_key and self.expect_masking:
msg = CloseControlMessage(
code=1002,
reason='Missing masking when expected')
self.errors.append(msg)
break
elif frame.masking_key and not self.expect_masking:
msg = CloseControlMessage(
code=1002, reason='Masked when not expected')
self.errors.append(msg)
break
else:
bytes = bytearray(bytes)
if frame.opcode == OPCODE_TEXT:
if self.message and not self.message.completed:
# We got a text frame before we completed the previous one
msg = CloseControlMessage(
code=1002,
reason=
'Received a new message before completing previous'
)
self.errors.append(msg)
break
m = TextMessage(bytes)
m.completed = (frame.fin == 1)
self.message = m
if bytes:
is_valid, end_on_code_point, _, _ = utf8validator.validate(
bytes)
if not is_valid or (m.completed
and not end_on_code_point):
self.errors.append(
CloseControlMessage(
code=1007,
reason='Invalid UTF-8 bytes'))
break
elif frame.opcode == OPCODE_BINARY:
m = BinaryMessage(bytes)
m.completed = (frame.fin == 1)
self.message = m
elif frame.opcode == OPCODE_CONTINUATION:
m = self.message
if m is None:
self.errors.append(
CloseControlMessage(
code=1002,
reason='Message not started yet'))
break
m.extend(bytes)
m.completed = (frame.fin == 1)
if m.opcode == OPCODE_TEXT:
if bytes:
is_valid, end_on_code_point, _, _ = utf8validator.validate(
bytes)
if not is_valid or (m.completed
and not end_on_code_point):
self.errors.append(
CloseControlMessage(
code=1007,
reason='Invalid UTF-8 bytes'))
break
elif frame.opcode == OPCODE_CLOSE:
code = 1000
reason = ""
if frame.payload_length == 0:
self.closing = CloseControlMessage(code=1000)
elif frame.payload_length == 1:
self.closing = CloseControlMessage(
code=1002, reason='Payload has invalid length')
else:
try:
code = int(
struct.unpack("!H", str(bytes[0:2]))[0])
except TypeError:
code = 1002
reason = 'Invalid Closing Frame Code Type'
except struct.error, sr:
code = 1002
reason = 'Failed at decoding closing code'
else:
# Those codes are reserved or plainly forbidden
if code not in VALID_CLOSING_CODES and not (
2999 < code < 5000):
reason = 'Invalid Closing Frame Code: %d' % code
code = 1002
elif frame.payload_length > 1:
reason = bytes[
2:] if frame.masking_key else bytearray(
frame.body[2:])
is_valid, end_on_code_point, _, _ = utf8validator.validate(
reason)
if not is_valid or not end_on_code_point:
self.errors.append(
CloseControlMessage(
code=1007,
reason='Invalid UTF-8 bytes'))
break
self.closing = CloseControlMessage(
code=code, reason=reason.decode('utf-8'))
elif frame.opcode == OPCODE_PING:
self.pings.append(PingControlMessage(bytes))
elif frame.opcode == OPCODE_PONG:
self.pongs.append(PongControlMessage(bytes))
def sendWebsocketMessage(self, txt):
cherrypy.engine.publish('websocket-broadcast',
TextMessage("BAR" + txt))
def closed(self, code, reason="Socket closed."):
cherrypy.engine.publish('websocket-broadcast', TextMessage(reason))
def receiver(self):
"""
Parser that keeps trying to interpret bytes it is fed with as
incoming frames part of a message.
Control message are single frames only while data messages, like text
and binary, may be fragmented accross frames.
The way it works is by instanciating a framing.Frame object,
then running its parser generator which yields how much bytes
it requires to performs its task. The stream parser yields this value
to its caller and feeds the frame parser.
When the frame parser raises StopIteration, the stream parser
tries to make sense of the parsed frame. It dispatches the frame's bytes
to the most appropriate message type based on the frame's opcode.
Overall this makes the stream parser totally agonstic to
the data provider.
"""
running = True
while running:
frame = Frame()
while True:
try:
bytes = (yield frame.parser.next())
if bytes is None:
raise InvalidBytesError()
frame.parser.send(bytes)
except StopIteration:
bytes = frame.body or ''
if frame.masking_key and bytes:
bytes = frame.unmask(bytes)
if frame.opcode == OPCODE_TEXT:
if self.message and not self.message.completed:
# We got a text frame before we completed the previous one
raise ProtocolException()
try:
m = TextMessage(bytes.decode("utf-8", "replace"))
m.completed = (frame.fin == 1)
self.message = m
except UnicodeDecodeError:
self.errors.append(CloseControlMessage(code=1007))
break
elif frame.opcode == OPCODE_BINARY:
m = BinaryMessage(bytes)
m.completed = (frame.fin == 1)
self.message = m
elif frame.opcode == OPCODE_CONTINUATION:
m = self.message
if m is None:
raise ProtocolException()
m.completed = (frame.fin == 1)
if m.opcode == OPCODE_TEXT:
try:
m.extend(bytes.decode("utf-8", "replace"))
except UnicodeDecodeError:
self.errors.append(
CloseControlMessage(code=1007))
break
else:
m.extend(bytes)
elif frame.opcode == OPCODE_CLOSE:
self.closing = CloseControlMessage(
reason=bytes.decode("utf-8", "replace"))
elif frame.opcode == OPCODE_PING:
self.pings.append(PingControlMessage(bytes))
elif frame.opcode == OPCODE_PONG:
self.pongs.append(PongControlMessage(bytes))
else:
self.errors.append(CloseControlMessage(code=1003))
# When the frame's payload is empty, we must yield
# once more so that the caller is properly aligned
if not bytes:
yield 0
break
except ProtocolException:
self.errors.append(CloseControlMessage(code=1002))
except FrameTooLargeException:
self.errors.append(CloseControlMessage(code=1004))
except StreamClosed:
running = False
break
frame.parser.close()
# -*- coding: utf-8 -*-
from ws4py.client.threadedclient import WebSocketClient
from ws4py.messaging import TextMessage
class Lab126Client(WebSocketClient):
def received_message(self, m):
if not hasattr(self,'msgNum'):
self.msgNum=0
print "=> In Client, received message is: %s" % str(m)
if self.msgNum >= 5:
self.close(reason='Bye bye')
else:
msg = TextMessage("Message again from client, number: %d." %self.msgNum)
self.send(msg)
self.msgNum+=1
if __name__ == '__main__':
try:
ws = Lab126Client('http://localhost:9000/ws', protocols=['http-only', 'chat'])
ws.daemon = False
ws.connect()
msg = TextMessage("Message from client.")
ws.send(msg)
except KeyboardInterrupt:
ws.close()
def doRFID():
cherrypy.engine.publish("websocket-broadcast",
TextMessage(rfidHandler.blockingRead()))
