def test_text_message_with_continuation_and_ping_in_between(self):
msg = b'hello there'
key = os.urandom(4)
f = Frame(opcode=OPCODE_TEXT, body=msg, fin=0, masking_key=os.urandom(4)).build()
s = Stream()
self.assertEqual(s.has_message, False)
s.parser.send(f)
self.assertEqual(s.message.completed, False)
for i in range(3):
f = Frame(opcode=OPCODE_CONTINUATION, body=msg, fin=0, masking_key=os.urandom(4)).build()
s.parser.send(f)
self.assertEqual(s.has_message, False)
self.assertEqual(s.message.completed, False)
self.assertEqual(s.message.opcode, OPCODE_TEXT)
f = Frame(opcode=OPCODE_PING, body=b'ping me', fin=1, masking_key=os.urandom(4)).build()
self.assertEqual(len(s.pings), i)
s.parser.send(f)
self.assertEqual(len(s.pings), i+1)
f = Frame(opcode=OPCODE_CONTINUATION, body=msg, fin=1, masking_key=os.urandom(4)).build()
s.parser.send(f)
self.assertEqual(s.has_message, True)
self.assertEqual(s.message.opcode, OPCODE_TEXT)
self.assertEqual(s.message.completed, True)
def test_binary_message_with_continuation_received(self):
msg = os.urandom(16)
key = os.urandom(4)
f = Frame(opcode=OPCODE_BINARY, body=msg, fin=0,
masking_key=key).build()
s = Stream()
self.assertEqual(s.has_message, False)
s.parser.send(enc(f))
self.assertEqual(s.has_message, False)
for i in range(3):
f = Frame(opcode=OPCODE_CONTINUATION,
body=msg,
fin=0,
masking_key=key).build()
s.parser.send(enc(f))
self.assertEqual(s.has_message, False)
self.assertEqual(s.message.completed, False)
self.assertEqual(s.message.opcode, OPCODE_BINARY)
f = Frame(opcode=OPCODE_CONTINUATION, body=msg, fin=1,
masking_key=key).build()
s.parser.send(enc(f))
self.assertEqual(s.has_message, True)
self.assertEqual(s.message.completed, True)
self.assertEqual(s.message.opcode, OPCODE_BINARY)
def test_masking(self):
mask = "7\xfa!="
f = Frame(opcode=OPCODE_TEXT,
body='Hello', masking_key=mask, fin=1)
spec_says = '\x81\x857\xfa!=\x7f\x9fMQX'
self.assertEqual(f.build(), spec_says)
def test_invalid_opcode(self):
for opcode in range(3, 9):
f = Frame()
self.assertRaises(ProtocolException, f.parser.send, chr(opcode))
f = Frame()
self.assertRaises(ProtocolException, f.parser.send, chr(10))
def test_connect_and_close(self, sock):
s = MagicMock()
sock.socket.return_value = s
sock.getaddrinfo.return_value = [(socket.AF_INET, socket.SOCK_STREAM, 0, "",
("127.0.0.1", 80, 0, 0))]
c = WebSocketBaseClient(url="ws://127.0.0.1/?token=value")
s.recv.return_value = b"\r\n".join([
b"HTTP/1.1 101 Switching Protocols",
b"Connection: Upgrade",
b"Sec-Websocket-Version: 13",
b"Content-Type: text/plain;charset=utf-8",
b"Sec-Websocket-Accept: " + b64encode(sha1(c.key + WS_KEY).digest()),
b"Upgrade: websocket",
b"Date: Sun, 26 Jul 2015 12:32:55 GMT",
b"Server: ws4py/test",
b"\r\n"
])
c.connect()
s.connect.assert_called_once_with(("127.0.0.1", 80))
s.reset_mock()
c.close(code=1006, reason="boom")
args = s.sendall.call_args_list[0]
f = Frame()
f.parser.send(args[0][0])
f.parser.close()
self.assertIn(b'boom', f.unmask(f.body))
def test_63_bit_length(self):
f = Frame(opcode=OPCODE_TEXT, body=b"*" * 65536, fin=1)
self.assertEqual(len(f.build()), 65546)
mask = os.urandom(4)
f = Frame(opcode=OPCODE_TEXT, body=b"*" * 65536, masking_key=mask, fin=1)
self.assertEqual(len(f.build()), 65550)
def test_connect_and_close(self, sock):
s = MagicMock()
sock.socket.return_value = s
sock.getaddrinfo.return_value = [(socket.AF_INET, socket.SOCK_STREAM,
0, "", ("127.0.0.1", 80, 0, 0))]
c = WebSocketBaseClient(url="ws://127.0.0.1/?token=value")
s.recv.return_value = b"\r\n".join([
b"HTTP/1.1 101 Switching Protocols", b"Connection: Upgrade",
b"Sec-Websocket-Version: 13",
b"Content-Type: text/plain;charset=utf-8",
b"Sec-Websocket-Accept: " +
b64encode(sha1(c.key + WS_KEY).digest()), b"Upgrade: websocket",
b"Date: Sun, 26 Jul 2015 12:32:55 GMT", b"Server: ws4py/test",
b"\r\n"
])
c.connect()
s.connect.assert_called_once_with(("127.0.0.1", 80))
s.reset_mock()
c.close(code=1006, reason="boom")
args = s.sendall.call_args_list[0]
f = Frame()
f.parser.send(args[0][0])
f.parser.close()
self.assertIn(b'boom', f.unmask(f.body))
def test_frame_sized_126(self):
body = b'*' * 256
bytes = Frame(opcode=OPCODE_TEXT, body=body, fin=1).build()
f = Frame()
# determine how the size is stored
f.parser.send(bytes[:3])
self.assertTrue(f.masking_key is None)
# that's a large frame indeed
self.assertEqual(f.payload_length, 126)
# this will compute the actual application data size
# it will also read the first byte of data
# indeed the length is found from byte 3 to 10
f.parser.send(bytes[3:11])
self.assertEqual(f.payload_length, 256)
# parse the rest of our data
f.parser.send(bytes[11:])
self.assertEqual(f.body, body)
# The same but this time we provide enough
# bytes so that the application's data length
# can be computed from the first generator's send call
f = Frame()
f.parser.send(bytes[:10])
self.assertTrue(f.masking_key is None)
self.assertEqual(f.payload_length, 256)
# parse the rest of our data
f.parser.send(bytes[10:])
self.assertEqual(f.body, body)
def test_plugin(self):
manager = cherrypy.engine.websocket.manager
self.assertEqual(len(manager), 0)
s = MagicMock()
s.recv.return_value = Frame(opcode=OPCODE_TEXT,
body=b'hello',
fin=1,
masking_key=os.urandom(4)).build()
h = EchoWebSocket(s, [], [])
cherrypy.engine.publish('handle-websocket', h, ('127.0.0.1', 0))
self.assertEqual(len(manager), 1)
self.assertTrue(h in manager)
# the following call to .close() on the
# websocket object will initiate
# the closing handshake
# This next line mocks the response
# from the client to actually
# complete the handshake.
# The manager will then remove the websocket
# from its pool
s.recv.return_value = Frame(opcode=OPCODE_CLOSE,
body=b"ok we're done",
fin=1,
masking_key=os.urandom(4)).build()
h.close()
# the poller runs a thread, give it time to get there
time.sleep(1)
# TODO: Implement a fake poller so that works...
self.assertEqual(len(manager), 0)
def test_frame_sized_below_127(self):
bytes = Frame(opcode=OPCODE_TEXT, body=b'*' * 65536, fin=1).build()
f = Frame()
f.parser.send(bytes[:3])
self.assertTrue(f.masking_key is None)
self.assertEqual(f.payload_length, 127)
def test_incremental_parsing_small_7_bit_length(self):
bytes = Frame(opcode=OPCODE_TEXT, body=enc('hello'), fin=1).build()
f = Frame()
map_on_bytes(f.parser.send, bytes)
self.assertTrue(f.masking_key is None)
self.assertEqual(f.payload_length, 5)
def test_incremental_parsing_63_bit_length(self):
bytes = Frame(opcode=OPCODE_TEXT, body=b'*' * 65536, fin=1).build()
f = Frame()
map_on_bytes(f.parser.send, bytes)
self.assertTrue(f.masking_key is None)
self.assertEqual(f.payload_length, 65536)
def test_text_message_with_continuation_received(self):
msg = 'hello there'
f = Frame(opcode=OPCODE_TEXT,
body=msg,
fin=0,
masking_key=os.urandom(4)).build()
s = Stream()
self.assertEqual(s.has_message, False)
s.parser.send(enc(f))
self.assertEqual(s.message.completed, False)
for i in range(3):
f = Frame(opcode=OPCODE_CONTINUATION,
body=msg,
fin=0,
masking_key=os.urandom(4)).build()
s.parser.send(enc(f))
self.assertEqual(s.has_message, False)
self.assertEqual(s.message.completed, False)
self.assertEqual(s.message.opcode, OPCODE_TEXT)
f = Frame(opcode=OPCODE_CONTINUATION,
body=msg,
fin=1,
masking_key=os.urandom(4)).build()
s.parser.send(enc(f))
self.assertEqual(s.has_message, True)
self.assertEqual(s.message.completed, True)
self.assertEqual(s.message.opcode, OPCODE_TEXT)
def test_masking(self):
if py3k: mask = b"7\xfa!="
else: mask = "7\xfa!="
f = Frame(opcode=OPCODE_TEXT, body=b'Hello', masking_key=mask, fin=1)
if py3k: spec_says = b'\x81\x857\xfa!=\x7f\x9fMQX'
else: spec_says = '\x81\x857\xfa!=\x7f\x9fMQX'
self.assertEqual(f.build(), spec_says)
def test_opcodes(self):
for opcode in [OPCODE_CONTINUATION, OPCODE_TEXT, OPCODE_BINARY, OPCODE_CLOSE, OPCODE_PING, OPCODE_PONG]:
f = Frame(opcode=opcode, body=b"", fin=1)
byte = ord(f.build()[0])
self.assertTrue(byte & opcode == opcode)
f = Frame(opcode=0x3, body=b"", fin=1)
self.assertRaises(ValueError, f.build)
def test_incremental_parsing_16_bit_length(self):
bytes = Frame(opcode=OPCODE_TEXT, body='*' * 126, fin=1).build()
f = Frame()
for byte in bytes:
f.parser.send(byte)
self.assertTrue(f.masking_key is None)
self.assertEqual(f.payload_length, 126)
def test_masking(self):
if py3k: mask = b"7\xfa!="
else: mask = "7\xfa!="
f = Frame(opcode=OPCODE_TEXT,
body=enc('Hello'),
masking_key=mask, fin=1)
if py3k: spec_says = b'\x81\x857\xfa!=\x7f\x9fMQX'
else: spec_says = '\x81\x857\xfa!=\x7f\x9fMQX'
self.assertEqual(f.build(), spec_says)
def test_opcodes(self):
for opcode in [
OPCODE_CONTINUATION, OPCODE_TEXT, OPCODE_BINARY, OPCODE_CLOSE,
OPCODE_PING, OPCODE_PONG
]:
f = Frame(opcode=opcode, body=b'', fin=1)
byte = ord(f.build()[0])
self.assertTrue(byte & opcode == opcode)
f = Frame(opcode=0x3, body=b'', fin=1)
self.assertRaises(ValueError, f.build)
def received_message(self, m):
# Assuming type of arraybuffer
xx = N.fromstring(m.data, N.int16, count=5)
# xx = N.fromstring(m.data, N.float32, count=4)
print xx
xx = xx*2;
f = Frame(OPCODE_BINARY, xx.tostring(), fin=1)
b = f.build()
yy = BinaryMessage(b)
for conn in SUBSCRIBERS:
conn.send(yy)
def test_frame_header_parsing(self):
bytes = Frame(opcode=OPCODE_TEXT, body=b'hello', fin=1).build()
f = Frame()
self.assertEqual(f.parser.send(bytes[0:1]), 1)
self.assertEqual(f.fin, 1)
self.assertEqual(f.rsv1, 0)
self.assertEqual(f.rsv2, 0)
self.assertEqual(f.rsv3, 0)
self.assertEqual(f.parser.send(bytes[1:2]), 5)
self.assertTrue(f.masking_key is None)
self.assertEqual(f.payload_length, 5)
f.parser.close()
def test_frame_payload_parsing(self):
bytes = Frame(opcode=OPCODE_TEXT, body=b'hello', fin=1).build()
f = Frame()
self.assertEqual(f.parser.send(bytes[0:1]), 1)
self.assertEqual(f.parser.send(bytes[1:2]), 5)
f.parser.send(bytes[2:])
self.assertEqual(f.body, b'hello')
f = Frame()
f.parser.send(bytes)
self.assertRaises(StopIteration, next, f.parser)
self.assertEqual(f.body, b'hello')
def test_protocol_exception_from_frame_parsing(self):
payload = struct.pack("!H", 1000) + b'hello'
f = Frame(opcode=OPCODE_CLOSE, body=payload,
fin=1, masking_key=os.urandom(4))
f.rsv1 = 1
f = f.build()
s = Stream()
self.assertEqual(len(s.errors), 0)
self.assertEqual(s.closing, None)
s.parser.send(f)
self.assertEqual(s.closing, None)
self.assertEqual(type(s.errors[0]), CloseControlMessage)
self.assertEqual(s.errors[0].code, 1002)
def test_ping_message_received(self):
msg = 'ping me'
f = Frame(opcode=OPCODE_PING, body=msg, fin=1).build()
s = Stream()
self.assertEqual(len(s.pings), 0)
s.parser.send(f)
self.assertEqual(len(s.pings), 1)
def test_pong_message_received(self):
msg = b'pong!'
f = Frame(opcode=OPCODE_PONG, body=msg, fin=1, masking_key=os.urandom(4)).build()
s = Stream()
self.assertEqual(len(s.pongs), 0)
s.parser.send(f)
self.assertEqual(len(s.pongs), 1)
def test_binary_and_text_messages_cannot_interleave(self):
s = Stream()
f = Frame(opcode=OPCODE_TEXT, body=b'hello',
fin=0, masking_key=os.urandom(4)).build()
s.parser.send(f)
next(s.parser)
f = Frame(opcode=OPCODE_BINARY, body=os.urandom(7),
fin=1, masking_key=os.urandom(4)).build()
s.parser.send(f)
next(s.parser)
self.assertNotEqual(s.errors, [])
self.assertIsInstance(s.errors[0], CloseControlMessage)
self.assertEqual(s.errors[0].code, 1002)
def test_binary_message_received(self):
msg = os.urandom(16)
f = Frame(opcode=OPCODE_BINARY, body=msg, fin=1, masking_key=os.urandom(4)).build()
s = Stream()
self.assertEqual(s.has_message, False)
s.parser.send(f)
self.assertEqual(s.message.completed, True)
def test_invalid_encoded_bytes_on_continuation(self):
s = Stream()
f = Frame(opcode=OPCODE_TEXT, body=b'hello',
fin=0, masking_key=os.urandom(4)).build()
s.parser.send(f)
next(s.parser)
f = Frame(opcode=OPCODE_CONTINUATION, body=b'h\xc3llo',
fin=1, masking_key=os.urandom(4)).build()
s.parser.send(f)
next(s.parser)
self.assertNotEqual(s.errors, [])
self.assertIsInstance(s.errors[0], CloseControlMessage)
self.assertEqual(s.errors[0].code, 1007)
def test_text_message_received(self):
msg = b'hello there'
f = Frame(opcode=OPCODE_TEXT, body=msg, fin=1, masking_key=os.urandom(4)).build()
s = Stream()
self.assertEqual(s.has_message, False)
s.parser.send(f)
self.assertEqual(s.message.completed, True)
def test_text_message_received(self):
msg = b'hello there'
f = Frame(opcode=OPCODE_TEXT, body=msg, fin=1, masking_key=os.urandom(4)).build()
s = Stream()
self.assertEqual(len(s.messages), 0)
s.parser.send(f)
self.assertEqual(len(s.messages), 1)
def test_frame_sized_127(self):
body = b'*'*65536
bytes = Frame(opcode=OPCODE_TEXT, body=body, fin=1).build()
f = Frame()
# determine how the size is stored
f.parser.send(bytes[:3])
self.assertTrue(f.masking_key is None)
# that's a large frame indeed
self.assertEqual(f.payload_length, 127)
# this will compute the actual application data size
# it will also read the first byte of data
# indeed the length is found from byte 3 to 10
f.parser.send(bytes[3:11])
self.assertEqual(f.payload_length, 65536)
# parse the rest of our data
f.parser.send(bytes[11:])
self.assertEqual(f.body, body)
# The same but this time we provide enough
# bytes so that the application's data length
# can be computed from the first generator's send call
f = Frame()
f.parser.send(bytes[:10])
self.assertTrue(f.masking_key is None)
self.assertEqual(f.payload_length, 65536)
# parse the rest of our data
f.parser.send(bytes[10:])
self.assertEqual(f.body, body)
# The same with masking given out gradually
mask = os.urandom(4)
bytes = Frame(opcode=OPCODE_TEXT, body=body, fin=1, masking_key=mask).build()
f = Frame()
f.parser.send(bytes[:10])
self.assertTrue(f.masking_key is None)
self.assertEqual(f.payload_length, 65536)
# parse the mask gradually
f.parser.send(bytes[10:12])
f.parser.send(bytes[12:])
self.assertEqual(f.unmask(f.body), body)
def test_incremental_text_message_received(self):
msg = 'hello there'
f = Frame(opcode=OPCODE_TEXT, body=msg, fin=1).build()
s = Stream()
self.assertEqual(s.has_message, False)
for byte in f:
s.parser.send(byte)
self.assertEqual(s.has_message, True)
def test_using_masking_key_when_unexpected(self):
f = Frame(opcode=OPCODE_TEXT, body=b'hello', fin=1, masking_key=os.urandom(4)).build()
s = Stream(expect_masking=False)
s.parser.send(f)
next(s.parser)
self.assertNotEqual(s.errors, [])
self.assertIsInstance(s.errors[0], CloseControlMessage)
self.assertEqual(s.errors[0].code, 1002)
def test_closing_parser_should_release_resources(self):
f = Frame(opcode=OPCODE_TEXT,
body=b'hello',
fin=1,
masking_key=os.urandom(4)).build()
s = Stream()
s.parser.send(f)
s.parser.close()
def single(self, mask=False):
"""
Returns a frame bytes with the fin bit set and a random mask.
"""
mask = os.urandom(4) if mask else None
return Frame(body=self.data or '',
opcode=self.opcode,
masking_key=mask,
fin=1).build()
def test_incremental_text_message_received(self):
msg = b'hello there'
f = Frame(opcode=OPCODE_TEXT, body=msg, fin=1, masking_key=os.urandom(4)).build()
s = Stream()
self.assertEqual(s.has_message, False)
bytes = f
for index, byte in enumerate(bytes):
s.parser.send(bytes[index:index+1])
self.assertEqual(s.has_message, True)
def test_empty_close_message(self):
f = Frame(opcode=OPCODE_CLOSE,
body=enc(''),
fin=1,
masking_key=os.urandom(4)).build()
s = Stream()
self.assertEqual(s.closing, None)
s.parser.send(enc(f))
self.assertEqual(type(s.closing), CloseControlMessage)
def test_continuation_frame_before_message_started_is_invalid(self):
f = Frame(opcode=OPCODE_CONTINUATION, body=b'hello',
fin=1, masking_key=os.urandom(4)).build()
s = Stream()
s.parser.send(f)
next(s.parser)
self.assertNotEqual(s.errors, [])
self.assertIsInstance(s.errors[0], CloseControlMessage)
self.assertEqual(s.errors[0].code, 1002)
def test_7_bit_length(self):
f = Frame(opcode=OPCODE_TEXT, body=b"", fin=1)
self.assertEqual(len(f.build()), 2)
f = Frame(opcode=OPCODE_TEXT, body=b"*" * 125, fin=1)
self.assertEqual(len(f.build()), 127)
mask = os.urandom(4)
f = Frame(opcode=OPCODE_TEXT, body=b"", masking_key=mask, fin=1)
self.assertEqual(len(f.build()), 6)
f = Frame(opcode=OPCODE_TEXT, body=b"*" * 125, masking_key=mask, fin=1)
self.assertEqual(len(f.build()), 131)
def test_16_bit_length(self):
f = Frame(opcode=OPCODE_TEXT, body=b"*" * 126, fin=1)
self.assertEqual(len(f.build()), 130)
f = Frame(opcode=OPCODE_TEXT, body=b"*" * 65535, fin=1)
self.assertEqual(len(f.build()), 65539)
mask = os.urandom(4)
f = Frame(opcode=OPCODE_TEXT, body=b"*" * 126, masking_key=mask, fin=1)
self.assertEqual(len(f.build()), 134)
f = Frame(opcode=OPCODE_TEXT, body=b"*" * 65535, masking_key=mask, fin=1)
self.assertEqual(len(f.build()), 65543)
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 receiver(self):
global logAudio
"""
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.
"""
logAudio=settings.getVal("logAudio")
print("debug: streaming.py in receiver function | logAudio=%s" % logAudio)
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
if logAudio != "0":
print("debug:: received a binary frame with %d bytes, log it via localhost listner (port:%s)" % (len(some_bytes),logAudio))
#bstr1=""
#for i in range(20):
# str1="%d " % some_bytes[i]
# bstr1 = bstr1 + " " + str1
#print("binary msg 1st 20 bytes: %s" % bstr1)
# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# Connect the socket to the port where the server is listening
server_address = ('localhost', int(logAudio))
#print >>sys.stderr, 'connecting to %s port %s' % server_address
sock.connect(server_address)
try:
# Send data
traceUtf8=""
for i in range(10):
traceUtf8 = traceUtf8 + ' ' + str(some_bytes[i])
print("debug:send a mp3 frame (len=%d) to a log server [ %s ]" % (len(some_bytes),traceUtf8))
#print >>sys.stderr, '"%s"' % message
sock.sendall(some_bytes)
# Look for the response
amount_received = 0
amount_expected = 7
while amount_received < amount_expected:
data = sock.recv(10)
amount_received += len(data)
#print >>sys.stderr, 'received "%s"' % data
finally:
#print >>sys.stderr, 'closing socket'
sock.close()
# --- end of logAudio action
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 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()
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 next(frame.parser))
frame.parser.send(bytes)
except StopIteration:
frame._cleanup()
bytes = frame.body
# 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(unpack("!H", enc(bytes[0:2]))[0])
except TypeError:
code = 1002
reason = 'Invalid Closing Frame Code Type'
except struct.error as 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)
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))
break
except ProtocolException:
self.errors.append(CloseControlMessage(code=1002))
break
except FrameTooLargeException:
self.errors.append(CloseControlMessage(code=1002, reason="Frame was too large"))
break
except StreamClosed:
running = False
break
frame.body = None
frame = None
if self.message is not None and self.message.completed:
utf8validator.reset()
if frame:
frame._cleanup()
frame = None
utf8validator.reset()
utf8validator = None
self._cleanup()
def test_frame_too_large(self):
f = Frame(opcode=OPCODE_TEXT, body=b'', fin=1)
# fake huge length
f.payload_length = 1 << 63
self.assertRaises(FrameTooLargeException, f.build)
def test_passing_encoded_string(self):
# once encoded the u'\xe9' character will be of length 2
f = Frame(opcode=OPCODE_TEXT, body=u'\xe9trange'.encode('utf-8'), fin=1)
self.assertEqual(len(f.build()), 10)