def test_stream_close_behavior(self):
# Prepare a socket so we can open a stream.
sock = DummySocket()
c = HTTP20Connection('www.google.com')
c._sock = sock
# Open a few requests (which creates a stream)
s1 = c.request('GET', '/')
c.request('GET', '/')
# simulate state of blocking on read while sock
f = GoAwayFrame(0)
# Set error code to PROTOCOL_ERROR
f.error_code = 1
c._sock.buffer = BytesIO(f.serialize())
# 'Receive' the GOAWAY frame.
# Validate that the spec error name and description are used to throw
# the connection exception.
with pytest.raises(ConnectionError):
c.get_response(s1)
# try to read again after close
with pytest.raises(ConnectionError):
c._single_read()
def test_stream_close_behavior(self):
# Prepare a socket so we can open a stream.
sock = DummySocket()
c = HTTP20Connection('www.google.com')
c._sock = sock
# Open a few requests (which creates a stream)
s1 = c.request('GET', '/')
c.request('GET', '/')
# simulate state of blocking on read while sock
f = GoAwayFrame(0)
# Set error code to PROTOCOL_ERROR
f.error_code = 1
c._sock.buffer = BytesIO(f.serialize())
# 'Receive' the GOAWAY frame.
# Validate that the spec error name and description are used to throw
# the connection exception.
with pytest.raises(ConnectionError):
c.get_response(s1)
# try to read again after close
with pytest.raises(ConnectionError):
c._single_read()
def build_goaway_frame(self, last_stream_id, error_code=0):
"""
Builds a single GOAWAY frame.
"""
f = GoAwayFrame(0)
f.error_code = error_code
f.last_stream_id = last_stream_id
return f
def build_goaway_frame(self, last_stream_id, error_code=0):
"""
Builds a single GOAWAY frame.
"""
f = GoAwayFrame(0)
f.error_code = error_code
f.last_stream_id = last_stream_id
return f
def test_repr(self):
f = GoAwayFrame()
assert repr(f).endswith(
"last_stream_id=0, error_code=0, additional_data=b''")
f.last_stream_id = 64
f.error_code = 32
f.additional_data = b'hello'
assert repr(f).endswith(
"last_stream_id=64, error_code=32, additional_data=b'hello'")
def _terminate_connection(self, error_code):
"""
Terminate the connection early. Used in error handling blocks to send
GOAWAY frames.
"""
f = GoAwayFrame(0)
f.last_stream_id = self.highest_inbound_stream_id
f.error_code = error_code
self.state_machine.process_input(ConnectionInputs.SEND_GOAWAY)
self._prepare_for_sending([f])
def _terminate_connection(self, error_code):
"""
Terminate the connection early. Used in error handling blocks to send
GOAWAY frames.
"""
f = GoAwayFrame(0)
f.last_stream_id = self.highest_inbound_stream_id
f.error_code = error_code
self.state_machine.process_input(ConnectionInputs.SEND_GOAWAY)
self._prepare_for_sending([f])
def build_goaway_frame(self,
last_stream_id,
error_code=0,
additional_data=b''):
"""
Builds a single GOAWAY frame.
"""
f = GoAwayFrame(0)
f.error_code = error_code
f.last_stream_id = last_stream_id
f.additional_data = additional_data
return f
def build_goaway_frame(self,
last_stream_id,
error_code=0,
additional_data=b''):
"""
Builds a single GOAWAY frame.
"""
f = GoAwayFrame(0)
f.error_code = error_code
f.last_stream_id = last_stream_id
f.additional_data = additional_data
return f
def close_connection(self, error_code=0):
"""
Close a connection, emitting a GOAWAY frame.
"""
self.state_machine.process_input(ConnectionInputs.SEND_GOAWAY)
f = GoAwayFrame(0)
f.error_code = error_code
f.last_stream_id = self.highest_stream_id
self._prepare_for_sending([f])
return []
def close_connection(self, error_code=0):
"""
Close a connection, emitting a GOAWAY frame.
"""
self.state_machine.process_input(ConnectionInputs.SEND_GOAWAY)
f = GoAwayFrame(0)
f.error_code = error_code
f.last_stream_id = self.highest_stream_id
self._prepare_for_sending([f])
return []
def test_goaway_frame_NO_ERROR(self):
f = GoAwayFrame(0)
# Set error code to NO_ERROR
f.error_code = 0
c = HTTP20Connection('www.google.com')
c._sock = DummySocket()
c._sock.buffer = BytesIO(f.serialize())
# 'Receive' the GOAWAY frame.
# Test makes sure no exception is raised; error code 0 means we are
# dealing with a standard and graceful shutdown.
c._single_read()
def test_goaway_serializes_properly(self):
f = GoAwayFrame(0)
f.last_stream_id = 64
f.error_code = 32
f.additional_data = b'hello'
s = f.serialize()
assert s == (
b'\x00\x00\x0D\x07\x00\x00\x00\x00\x00' + # Frame header
b'\x00\x00\x00\x40' + # Last Stream ID
b'\x00\x00\x00\x20' + # Error Code
b'hello' # Additional data
)
def test_goaway_frame_NO_ERROR(self):
f = GoAwayFrame(0)
# Set error code to NO_ERROR
f.error_code = 0
c = HTTP20Connection('www.google.com')
c._sock = DummySocket()
c._sock.buffer = BytesIO(f.serialize())
# 'Receive' the GOAWAY frame.
# Test makes sure no exception is raised; error code 0 means we are
# dealing with a standard and graceful shutdown.
c._single_read()
def close_connection(self, error_code=0):
"""
Close a connection, emitting a GOAWAY frame.
:param error_code: (optional) The error code to send in the GOAWAY
frame.
:returns: Nothing
"""
self.state_machine.process_input(ConnectionInputs.SEND_GOAWAY)
f = GoAwayFrame(0)
f.error_code = error_code
f.last_stream_id = self.highest_inbound_stream_id
self._prepare_for_sending([f])
def close_connection(self, error_code=0):
"""
Close a connection, emitting a GOAWAY frame.
:param error_code: (optional) The error code to send in the GOAWAY
frame.
:returns: Nothing
"""
self.state_machine.process_input(ConnectionInputs.SEND_GOAWAY)
f = GoAwayFrame(0)
f.error_code = error_code
f.last_stream_id = self.highest_inbound_stream_id
self._prepare_for_sending([f])
def socket_handler(listener):
sock = listener.accept()[0]
# We should get one packet. Rather than respond to it, send a
# GOAWAY frame with error code 0 indicating clean shutdown.
sock.recv(65535)
# Now, send the shut down.
f = GoAwayFrame(0)
f.error_code = 1
sock.send(f.serialize())
# Wait for the message from the main thread.
sock.close()
recv_event.set()
def socket_handler(listener):
sock = listener.accept()[0]
# We should get one packet. Rather than respond to it, send a
# GOAWAY frame with error code 0 indicating clean shutdown.
sock.recv(65535)
# Now, send the shut down.
f = GoAwayFrame(0)
f.error_code = 1
sock.send(f.serialize())
# Wait for the message from the main thread.
sock.close()
recv_event.set()
def test_goaway_frame_invalid_error_code(self):
f = GoAwayFrame(0)
# Set error code to non existing error
f.error_code = 100
c = HTTP20Connection('www.google.com')
c._sock = DummySocket()
c._sock.buffer = BytesIO(f.serialize())
# 'Receive' the GOAWAY frame.
# If the error code does not exist in the spec then the additional
# data is used instead.
with pytest.raises(ConnectionError) as conn_err:
c._single_read()
err_msg = str(conn_err)
with pytest.raises(ValueError):
name, number, description = errors.get_data(100)
assert str(f.error_code) in err_msg
def test_goaway_frame_invalid_error_code(self):
f = GoAwayFrame(0)
# Set error code to non existing error
f.error_code = 100
c = HTTP20Connection('www.google.com')
c._sock = DummySocket()
c._sock.buffer = BytesIO(f.serialize())
# 'Receive' the GOAWAY frame.
# If the error code does not exist in the spec then the additional
# data is used instead.
with pytest.raises(ConnectionError) as conn_err:
c._single_read()
err_msg = str(conn_err)
with pytest.raises(ValueError):
name, number, description = errors.get_data(100)
assert str(f.error_code) in err_msg
def test_goaway_frame_PROTOCOL_ERROR(self):
f = GoAwayFrame(0)
# Set error code to PROTOCOL_ERROR
f.error_code = 1
c = HTTP20Connection('www.google.com')
c._sock = DummySocket()
c._sock.buffer = BytesIO(f.serialize())
# 'Receive' the GOAWAY frame.
# Validate that the spec error name and description are used to throw
# the connection exception.
with pytest.raises(ConnectionError) as conn_err:
c._single_read()
err_msg = str(conn_err)
name, number, description = errors.get_data(1)
assert name in err_msg
assert number in err_msg
assert description in err_msg
def test_goaway_frame_HTTP_1_1_REQUIRED(self):
f = GoAwayFrame(0)
# Set error code to HTTP_1_1_REQUIRED
f.error_code = 13
c = HTTP20Connection('www.google.com')
c._sock = DummySocket()
c._sock.buffer = BytesIO(f.serialize())
# 'Receive' the GOAWAY frame.
# Validate that the spec error name and description are used to throw
# the connection exception.
with pytest.raises(ConnectionError) as conn_err:
c._single_read()
err_msg = str(conn_err)
name, number, description = errors.get_data(13)
assert name in err_msg
assert number in err_msg
assert description in err_msg
def receive_frame(self, frame):
"""
Handle a frame received on the connection.
"""
try:
if frame.body_len > self.max_inbound_frame_size:
raise ProtocolError(
"Received overlong frame: length %d, max %d" %
(frame.body_len, self.max_inbound_frame_size)
)
# I don't love using __class__ here, maybe reconsider it.
frames, events = self._frame_dispatch_table[frame.__class__](frame)
except ProtocolError as e:
# For whatever reason, receiving the frame caused a protocol error.
# We should prepare to emit a GoAway frame before throwing the
# exception up further. No need for an event: the exception will
# do fine.
f = GoAwayFrame(0)
f.last_stream_id = sorted(self.streams.keys())[-1]
f.error_code = e.error_code
self.state_machine.process_input(ConnectionInputs.SEND_GOAWAY)
self._prepare_for_sending([f])
raise
except StreamClosedError as e:
# We need to send a RST_STREAM frame on behalf of the stream.
# The frame the stream wants to emit is already present in the
# exception.
# This does not require re-raising: it's an expected behaviour.
f = RstStreamFrame(e.stream_id)
f.error_code = e.error_code
self._prepare_for_sending([f])
events = []
else:
self._prepare_for_sending(frames)
return events
def test_goaway_serializes_properly(self):
f = GoAwayFrame()
f.last_stream_id = 64
f.error_code = 32
f.additional_data = b'hello'
s = f.serialize()
assert s == (
b'\x00\x00\x0D\x07\x00\x00\x00\x00\x00' + # Frame header
b'\x00\x00\x00\x40' + # Last Stream ID
b'\x00\x00\x00\x20' + # Error Code
b'hello' # Additional data
)
def test_resetting_streams_after_close(self):
"""
Attempts to reset streams when the connection is torn down are
tolerated.
"""
f = SettingsFrame(0)
c = HTTP20Connection('www.google.com')
c._sock = DummySocket()
c._sock.buffer = BytesIO(f.serialize())
# Open stream 1.
c.request('GET', '/')
# Swap out the buffer to get a GoAway frame.
f = GoAwayFrame(0)
f.error_code = 1
c._sock.buffer = BytesIO(f.serialize())
# "Read" the GoAway
with pytest.raises(ConnectionError):
c._single_read()
def receive_frame(self, frame):
"""
Handle a frame received on the connection.
"""
try:
if frame.body_len > self.max_inbound_frame_size:
raise ProtocolError(
"Received overlong frame: length %d, max %d" %
(frame.body_len, self.max_inbound_frame_size))
# I don't love using __class__ here, maybe reconsider it.
frames, events = self._frame_dispatch_table[frame.__class__](frame)
except ProtocolError as e:
# For whatever reason, receiving the frame caused a protocol error.
# We should prepare to emit a GoAway frame before throwing the
# exception up further. No need for an event: the exception will
# do fine.
f = GoAwayFrame(0)
f.last_stream_id = sorted(self.streams.keys())[-1]
f.error_code = e.error_code
self.state_machine.process_input(ConnectionInputs.SEND_GOAWAY)
self._prepare_for_sending([f])
raise
except StreamClosedError as e:
# We need to send a RST_STREAM frame on behalf of the stream.
# The frame the stream wants to emit is already present in the
# exception.
# This does not require re-raising: it's an expected behaviour.
f = RstStreamFrame(e.stream_id)
f.error_code = e.error_code
self._prepare_for_sending([f])
events = []
else:
self._prepare_for_sending(frames)
return events
def test_go_away_has_no_flags(self):
f = GoAwayFrame(0)
flags = f.parse_flags(0xFF)
assert not flags
assert isinstance(flags, set)
def test_goaway_frame_never_has_a_stream(self):
with pytest.raises(ValueError):
GoAwayFrame(stream_id=1)
def test_go_away_has_no_flags(self):
f = GoAwayFrame()
flags = f.parse_flags(0xFF)
assert not flags
assert isinstance(flags, Flags)
def test_goaway_frame_never_has_a_stream(self):
with pytest.raises(InvalidDataError):
GoAwayFrame(1)