def test_inject_message(ws_testdata):
tctx, playbook, flow = ws_testdata
assert (playbook << websocket.WebsocketStartHook(flow) >> reply() >>
WebSocketMessageInjected(
flow, WebSocketMessage(Opcode.TEXT, False, b"hello")) <<
websocket.WebsocketMessageHook(flow))
assert flow.websocket.messages[-1].content == b"hello"
assert flow.websocket.messages[-1].from_client is False
assert (playbook >> reply() << SendData(tctx.client, b"\x81\x05hello"))
def _handle_data_frame(self, frame, source_conn, other_conn, is_server):
fb = self.server_frame_buffer if is_server else self.client_frame_buffer
fb.append(frame)
if frame.header.fin:
payload = b''.join(f.payload for f in fb)
original_chunk_sizes = [len(f.payload) for f in fb]
message_type = fb[0].header.opcode
compressed_message = fb[0].header.rsv1
fb.clear()
websocket_message = WebSocketMessage(message_type, not is_server,
payload)
length = len(websocket_message.content)
self.flow.messages.append(websocket_message)
self.channel.ask("websocket_message", self.flow)
def get_chunk(payload):
if len(payload) == length:
# message has the same length, we can reuse the same sizes
pos = 0
for s in original_chunk_sizes:
yield payload[pos:pos + s]
pos += s
else:
# just re-chunk everything into 10kB frames
chunk_size = 10240
chunks = range(0, len(payload), chunk_size)
for i in chunks:
yield payload[i:i + chunk_size]
frms = [
websockets.Frame(
payload=chunk,
opcode=frame.header.opcode,
mask=(False if is_server else 1),
masking_key=(b'' if is_server else os.urandom(4)))
for chunk in get_chunk(websocket_message.content)
]
if len(frms) > 0:
frms[-1].header.fin = True
else:
frms.append(
websockets.Frame(
fin=True,
opcode=websockets.OPCODE.CONTINUE,
mask=(False if is_server else 1),
masking_key=(b'' if is_server else os.urandom(4))))
frms[0].header.opcode = message_type
frms[0].header.rsv1 = compressed_message
for frm in frms:
other_conn.send(bytes(frm))
return True
def _handle_data_received(self, event, source_conn, other_conn, is_server):
fb = self.server_frame_buffer if is_server else self.client_frame_buffer
fb.append(event.data)
if event.message_finished:
original_chunk_sizes = [len(f) for f in fb]
if isinstance(event, events.TextReceived):
message_type = wsproto.frame_protocol.Opcode.TEXT
payload = ''.join(fb)
else:
message_type = wsproto.frame_protocol.Opcode.BINARY
payload = b''.join(fb)
fb.clear()
websocket_message = WebSocketMessage(message_type, not is_server,
payload)
length = len(websocket_message.content)
self.flow.messages.append(websocket_message)
self.channel.ask("websocket_message", self.flow)
if not self.flow.stream:
def get_chunk(payload):
if len(payload) == length:
# message has the same length, we can reuse the same sizes
pos = 0
for s in original_chunk_sizes:
yield (payload[pos:pos + s],
True if pos + s == length else False)
pos += s
else:
# just re-chunk everything into 4kB frames
# header len = 4 bytes without masking key and 8 bytes with masking key
chunk_size = 4092 if is_server else 4088
chunks = range(0, len(payload), chunk_size)
for i in chunks:
yield (payload[i:i + chunk_size], True if
i + chunk_size >= len(payload) else False)
for chunk, final in get_chunk(websocket_message.content):
self.connections[other_conn].send_data(chunk, final)
other_conn.send(
self.connections[other_conn].bytes_to_send())
else:
self.connections[other_conn].send_data(event.data,
event.message_finished)
other_conn.send(self.connections[other_conn].bytes_to_send())
elif self.flow.stream:
self.connections[other_conn].send_data(event.data,
event.message_finished)
other_conn.send(self.connections[other_conn].bytes_to_send())
return True