def send_left_body(self):
while self.remote_window_size and not self.request_body_sended:
send_size = min(self.remote_window_size, self.request_body_left,
self.max_frame_size)
f = DataFrame(self.stream_id)
data_start = len(self.request_body) - self.request_body_left
f.data = self.request_body[data_start:data_start + send_size]
self.remote_window_size -= send_size
self.request_body_left -= send_size
# If the length of the data is less than MAX_CHUNK, we're probably
# at the end of the file. If this is the end of the data, mark it
# as END_STREAM.
if self.request_body_left == 0:
f.flags.add('END_STREAM')
# Send the frame and decrement the flow control window.
self._send_cb(f)
# If no more data is to be sent on this stream, transition our state.
if self.request_body_left == 0:
self.request_body_sended = True
self._close_local()
def socket_handler(listener):
sock = listener.accept()[0]
e = Encoder()
e.huffman_coder = HuffmanEncoder(REQUEST_CODES, REQUEST_CODES_LENGTH)
# We get two messages for the connection open and then a HEADERS
# frame.
receive_preamble(sock)
sock.recv(65535)
# Now, send the headers for the response. This response has no body.
f = build_headers_frame([(':status', '200'), ('content-length', '0')], e)
f.stream_id = 1
sock.send(f.serialize())
# Also send a data frame.
f = DataFrame(1)
f.data = b'have some data'
sock.send(f.serialize())
# Now, send a headers frame again, containing trailing headers.
f = build_headers_frame([('trailing', 'sure'), (':res', 'no')], e)
f.flags.add('END_STREAM')
f.stream_id = 1
sock.send(f.serialize())
# Wait for the message from the main thread.
recv_event.wait()
sock.close()
def test_stream_reading_works(self):
out_frames = []
in_frames = []
def send_cb(frame, tolerate_peer_gone=False):
out_frames.append(frame)
def recv_cb(s):
def inner():
s.receive_frame(in_frames.pop(0))
return inner
s = Stream(1, send_cb, None, None, None, None,
FlowControlManager(65535))
s._recv_cb = recv_cb(s)
s.state = STATE_HALF_CLOSED_LOCAL
# Provide a data frame to read.
f = DataFrame(1)
f.data = b'hi there!'
f.flags.add('END_STREAM')
in_frames.append(f)
data = s._read()
assert data == b'hi there!'
assert len(out_frames) == 0
def test_stream_reading_works(self):
out_frames = []
in_frames = []
def send_cb(frame, tolerate_peer_gone=False):
out_frames.append(frame)
def recv_cb(s):
def inner():
s.receive_frame(in_frames.pop(0))
return inner
s = Stream(1, send_cb, None, None, None, None, FlowControlManager(65535))
s._recv_cb = recv_cb(s)
s.state = STATE_HALF_CLOSED_LOCAL
# Provide a data frame to read.
f = DataFrame(1)
f.data = b'hi there!'
f.flags.add('END_STREAM')
in_frames.append(f)
data = s._read()
assert data == b'hi there!'
assert len(out_frames) == 0
def test_can_read_multiple_frames_from_streams(self):
out_frames = []
in_frames = []
def send_cb(frame, tolerate_peer_gone=False):
out_frames.append(frame)
def recv_cb(s):
def inner():
s.receive_frame(in_frames.pop(0))
return inner
s = Stream(1, send_cb, None, None, None, None, FlowControlManager(800))
s._recv_cb = recv_cb(s)
s.state = STATE_HALF_CLOSED_LOCAL
# Provide two data frames to read.
f = DataFrame(1)
f.data = b'hi there!'
in_frames.append(f)
f = DataFrame(1)
f.data = b'hi there again!'
f.flags.add('END_STREAM')
in_frames.append(f)
data = s._read()
assert data == b'hi there!hi there again!'
assert len(out_frames) == 1
assert isinstance(out_frames[0], WindowUpdateFrame)
assert out_frames[0].window_increment == len(b'hi there!')
def test_flow_control_manager_update_includes_padding(self):
out_frames = []
in_frames = []
def send_cb(frame):
out_frames.append(frame)
def recv_cb(s):
def inner():
s.receive_frame(in_frames.pop(0))
return inner
start_window = 65535
s = Stream(1, send_cb, None, None, None, None,
FlowControlManager(start_window))
s._recv_cb = recv_cb(s)
s.state = STATE_HALF_CLOSED_LOCAL
# Provide two data frames to read.
f = DataFrame(1)
f.data = b'hi there!'
f.pad_length = 10
f.flags.add('END_STREAM')
in_frames.append(f)
data = s._read()
assert data == b'hi there!'
assert s._in_window_manager.window_size == start_window - f.pad_length - len(
data) - 1
def socket_handler(listener):
sock = listener.accept()[0]
# Do the handshake: conn header, settings, send settings, recv ack.
receive_preamble(sock)
# Now expect some data. One headers frame and one data frame.
data.append(sock.recv(65535))
data.append(sock.recv(65535))
# Respond!
h = HeadersFrame(1)
h.data = self.get_encoder().encode({
':status': 200,
'Content-Type': 'not/real',
'Content-Length': 20
})
h.flags.add('END_HEADERS')
sock.send(h.serialize())
d = DataFrame(1)
d.data = b'1234567890' * 2
d.flags.add('END_STREAM')
sock.send(d.serialize())
send_event.set()
sock.close()
def send_left_body(self):
while self.remote_window_size and not self.request_body_sended:
send_size = min(self.remote_window_size, self.request_body_left, self.max_frame_size)
f = DataFrame(self.stream_id)
data_start = len(self.request_body) - self.request_body_left
f.data = self.request_body[data_start:data_start+send_size]
self.remote_window_size -= send_size
self.request_body_left -= send_size
# If the length of the data is less than MAX_CHUNK, we're probably
# at the end of the file. If this is the end of the data, mark it
# as END_STREAM.
if self.request_body_left == 0:
f.flags.add('END_STREAM')
# Send the frame and decrement the flow control window.
self._send_cb(f)
# If no more data is to be sent on this stream, transition our state.
if self.request_body_left == 0:
self.request_body_sended = True
self._close_local()
self.task.set_state("end send left body")
def test_flow_control_manager_update_includes_padding(self):
out_frames = []
in_frames = []
def send_cb(frame):
out_frames.append(frame)
def recv_cb(s):
def inner():
s.receive_frame(in_frames.pop(0))
return inner
start_window = 65535
s = Stream(1, send_cb, None, None, None, None, FlowControlManager(start_window))
s._recv_cb = recv_cb(s)
s.state = STATE_HALF_CLOSED_LOCAL
# Provide two data frames to read.
f = DataFrame(1)
f.data = b'hi there!'
f.pad_length = 10
f.flags.add('END_STREAM')
in_frames.append(f)
data = s._read()
assert data == b'hi there!'
assert s._in_window_manager.window_size == start_window - f.pad_length - len(data) - 1
def test_window_increments_appropriately(self):
e = Encoder()
h = HeadersFrame(1)
h.data = e.encode({':status': 200, 'content-type': 'foo/bar'})
h.flags = set(['END_HEADERS'])
d = DataFrame(1)
d.data = b'hi there sir'
d2 = DataFrame(1)
d2.data = b'hi there sir again'
d2.flags = set(['END_STREAM'])
sock = DummySocket()
sock.buffer = BytesIO(h.serialize() + d.serialize() + d2.serialize())
c = HTTP20Connection('www.google.com')
c._sock = sock
c.window_manager.window_size = 1000
c.window_manager.initial_window_size = 1000
c.request('GET', '/')
resp = c.get_response()
resp.read()
queue = list(map(decode_frame, map(memoryview, sock.queue)))
assert len(queue) == 3 # one headers frame, two window update frames.
assert isinstance(queue[1], WindowUpdateFrame)
assert queue[1].window_increment == len(b'hi there sir')
assert isinstance(queue[2], WindowUpdateFrame)
assert queue[2].window_increment == len(b'hi there sir again')
def test_window_increments_appropriately(self):
e = Encoder()
h = HeadersFrame(1)
h.data = e.encode({':status': 200, 'content-type': 'foo/bar'})
h.flags = set(['END_HEADERS'])
d = DataFrame(1)
d.data = b'hi there sir'
d2 = DataFrame(1)
d2.data = b'hi there sir again'
d2.flags = set(['END_STREAM'])
sock = DummySocket()
sock.buffer = BytesIO(h.serialize() + d.serialize() + d2.serialize())
c = HTTP20Connection('www.google.com')
c._sock = sock
c.window_manager.window_size = 1000
c.window_manager.initial_window_size = 1000
c.request('GET', '/')
resp = c.get_response()
resp.read()
queue = list(map(decode_frame, map(memoryview, sock.queue)))
assert len(queue) == 3 # one headers frame, two window update frames.
assert isinstance(queue[1], WindowUpdateFrame)
assert queue[1].window_increment == len(b'hi there sir')
assert isinstance(queue[2], WindowUpdateFrame)
assert queue[2].window_increment == len(b'hi there sir again')
def socket_handler(listener):
sock = listener.accept()[0]
# Do the handshake: conn header, settings, send settings, recv ack.
receive_preamble(sock)
# Now expect some data. One headers frame.
data.append(sock.recv(65535))
# Respond!
h = HeadersFrame(1)
h.data = self.get_encoder().encode({':status': 200, 'Content-Type': 'not/real', 'Content-Length': 20})
h.flags.add('END_HEADERS')
sock.send(h.serialize())
d = DataFrame(1)
d.data = b'1234567890' * 2
d.flags.add('END_STREAM')
sock.send(d.serialize())
send_event.wait()
sock.close()
def test_can_read_multiple_frames_from_streams(self):
out_frames = []
in_frames = []
def send_cb(frame, tolerate_peer_gone=False):
out_frames.append(frame)
def recv_cb(s):
def inner():
s.receive_frame(in_frames.pop(0))
return inner
s = Stream(1, send_cb, None, None, None, None, FlowControlManager(800))
s._recv_cb = recv_cb(s)
s.state = STATE_HALF_CLOSED_LOCAL
# Provide two data frames to read.
f = DataFrame(1)
f.data = b'hi there!'
in_frames.append(f)
f = DataFrame(1)
f.data = b'hi there again!'
f.flags.add('END_STREAM')
in_frames.append(f)
data = s._read()
assert data == b'hi there!hi there again!'
assert len(out_frames) == 1
assert isinstance(out_frames[0], WindowUpdateFrame)
assert out_frames[0].window_increment == len(b'hi there!')
def socket_handler(listener):
sock = listener.accept()[0]
e = Encoder()
e.huffman_coder = HuffmanEncoder(REQUEST_CODES,
REQUEST_CODES_LENGTH)
# We get two messages for the connection open and then a HEADERS
# frame.
receive_preamble(sock)
sock.recv(65535)
# Now, send the headers for the response. This response has no body.
f = build_headers_frame([(':status', '200'),
('content-length', '0')], e)
f.stream_id = 1
sock.send(f.serialize())
# Also send a data frame.
f = DataFrame(1)
f.data = b'have some data'
sock.send(f.serialize())
# Now, send a headers frame again, containing trailing headers.
f = build_headers_frame([('trailing', 'sure'), (':res', 'no')], e)
f.flags.add('END_STREAM')
f.stream_id = 1
sock.send(f.serialize())
# Wait for the message from the main thread.
recv_event.wait()
sock.close()
def test_can_read_single_frames_from_streams(self):
out_frames = []
in_frames = []
def send_cb(frame, tolerate_peer_gone=False):
out_frames.append(frame)
def recv_cb(s):
def inner():
s.receive_frame(in_frames.pop(0))
return inner
s = Stream(1, send_cb, None, None, None, None, FlowControlManager(800))
s._recv_cb = recv_cb(s)
s.state = STATE_HALF_CLOSED_LOCAL
# Provide two data frames to read.
f = DataFrame(1)
f.data = b'hi there!'
in_frames.append(f)
f = DataFrame(1)
f.data = b'hi there again!'
f.flags.add('END_STREAM')
in_frames.append(f)
data = s._read_one_frame()
assert data == b'hi there!'
data = s._read_one_frame()
assert data == b'hi there again!'
data = s._read_one_frame()
assert data is None
data = s._read()
assert data == b''
def socket_handler(listener):
sock = listener.accept()[0]
receive_preamble(sock)
data.append(sock.recv(65535))
send_event.wait()
h = HeadersFrame(1)
h.data = self.get_encoder().encode({
':status': 200,
'Content-Type': 'not/real',
'Content-Length': 14,
'Server': 'socket-level-server'
})
h.flags.add('END_HEADERS')
sock.send(h.serialize())
d = DataFrame(1)
d.data = b'nsaislistening'
d.flags.add('END_STREAM')
sock.send(d.serialize())
sock.close()
def test_partial_reads_from_streams(self):
out_frames = []
in_frames = []
def send_cb(frame, tolerate_peer_gone=False):
out_frames.append(frame)
def recv_cb(s):
def inner():
s.receive_frame(in_frames.pop(0))
return inner
s = Stream(1, send_cb, None, None, None, None, FlowControlManager(800))
s._recv_cb = recv_cb(s)
s.state = STATE_HALF_CLOSED_LOCAL
# Provide two data frames to read.
f = DataFrame(1)
f.data = b'hi there!'
in_frames.append(f)
f = DataFrame(1)
f.data = b'hi there again!'
f.flags.add('END_STREAM')
in_frames.append(f)
# We'll get the entire first frame.
data = s._read(4)
assert data == b'hi there!'
assert len(out_frames) == 1
# Now we'll get the entire of the second frame.
data = s._read(4)
assert data == b'hi there again!'
assert len(out_frames) == 1
assert s.state == STATE_CLOSED
def socket_handler(listener):
sock = listener.accept()[0]
receive_preamble(sock)
data.append(sock.recv(65535))
send_event.wait()
h = HeadersFrame(1)
h.data = self.get_encoder().encode(
{':status': 200,
'Content-Type': 'not/real',
'Content-Length': 14,
'Server': 'socket-level-server'}
)
h.flags.add('END_HEADERS')
sock.send(h.serialize())
d = DataFrame(1)
d.data = b'nsaislistening'
d.flags.add('END_STREAM')
sock.send(d.serialize())
sock.close()
def test_connection_doesnt_send_window_update_on_zero_length_data_frame(
self):
# Prepare a socket with a data frame in it that has no length.
sock = DummySocket()
sock.buffer = BytesIO(DataFrame(1).serialize())
c = HTTP20Connection('www.google.com')
c._sock = sock
# We open a request here just to allocate a stream, but we throw away
# the frames it sends.
c.request('GET', '/')
sock.queue = []
# Read the frame.
c._recv_cb()
# No frame should have been sent on the connection.
assert len(sock.queue) == 0
def test_reading_trailers_early_reads_all_data(self):
in_frames = []
headers = [('a', 'b'), ('c', 'd'), (':status', '200')]
trailers = [('e', 'f'), ('g', 'h')]
def recv_cb(s):
def inner():
s.receive_frame(in_frames.pop(0))
return inner
s = Stream(1, None, None, None, None, FixedDecoder(headers),
FlowControlManager(65535))
s._recv_cb = recv_cb(s)
s.state = STATE_HALF_CLOSED_LOCAL
# Provide the first HEADERS frame.
f = HeadersFrame(1)
f.data = b'hi there!'
f.flags.add('END_HEADERS')
in_frames.append(f)
# Provide some data.
f = DataFrame(1)
f.data = b'testdata'
in_frames.append(f)
# Provide the trailers.
f = HeadersFrame(1)
f.data = b'hi there again!'
f.flags.add('END_STREAM')
f.flags.add('END_HEADERS')
in_frames.append(f)
# Begin by reading the first headers.
assert s.getheaders() == HTTPHeaderMap(headers)
# Now, replace the dummy decoder to ensure we get a new header block.
s._decoder = FixedDecoder(trailers)
# Ask for the trailers. This should also read the data frames.
assert s.gettrailers() == HTTPHeaderMap(trailers)
assert s.data == [b'testdata']
def test_receive_unexpected_stream_id(self):
frames = []
def data_callback(frame):
frames.append(frame)
c = HTTP20Connection('www.google.com')
c._send_cb = data_callback
f = DataFrame(2)
data = memoryview(b"hi there sir")
c._consume_frame_payload(f, data)
# If we receive an unexpected stream id then we cancel the stream
# by sending a reset stream that contains the protocol error code (1)
f = frames[0]
assert len(frames) == 1
assert f.stream_id == 2
assert isinstance(f, RstStreamFrame)
assert f.error_code == 1 # PROTOCOL_ERROR
def test_can_read_single_frames_from_streams(self):
out_frames = []
in_frames = []
def send_cb(frame, tolerate_peer_gone=False):
out_frames.append(frame)
def recv_cb(s):
def inner():
s.receive_frame(in_frames.pop(0))
return inner
s = Stream(1, send_cb, None, None, None, None, FlowControlManager(800))
s._recv_cb = recv_cb(s)
s.state = STATE_HALF_CLOSED_LOCAL
# Provide two data frames to read.
f = DataFrame(1)
f.data = b'hi there!'
in_frames.append(f)
f = DataFrame(1)
f.data = b'hi there again!'
f.flags.add('END_STREAM')
in_frames.append(f)
data = s._read_one_frame()
assert data == b'hi there!'
data = s._read_one_frame()
assert data == b'hi there again!'
data = s._read_one_frame()
assert data is None
data = s._read()
assert data == b''
def test_partial_reads_from_streams(self):
out_frames = []
in_frames = []
def send_cb(frame, tolerate_peer_gone=False):
out_frames.append(frame)
def recv_cb(s):
def inner():
s.receive_frame(in_frames.pop(0))
return inner
s = Stream(1, send_cb, None, None, None, None, FlowControlManager(800))
s._recv_cb = recv_cb(s)
s.state = STATE_HALF_CLOSED_LOCAL
# Provide two data frames to read.
f = DataFrame(1)
f.data = b'hi there!'
in_frames.append(f)
f = DataFrame(1)
f.data = b'hi there again!'
f.flags.add('END_STREAM')
in_frames.append(f)
# We'll get the entire first frame.
data = s._read(4)
assert data == b'hi there!'
assert len(out_frames) == 1
# Now we'll get the entire of the second frame.
data = s._read(4)
assert data == b'hi there again!'
assert len(out_frames) == 1
assert s.state == STATE_CLOSED
def add_data_frame(self, stream_id, data, end_stream=False):
frame = DataFrame(stream_id)
frame.data = data
if end_stream:
frame.flags.add('END_STREAM')
self.frames.append(frame)
def add_data_frame(self, stream_id, data, end_stream=False):
frame = DataFrame(stream_id)
frame.data = data
if end_stream:
frame.flags.add('END_STREAM')
self.frames.append(frame)
