def get_frame_bin(self):
# Encode header
encoder = Encoder()
headers_frame_field = bytearray()
if self._data is None: # if user didn't touch data
self._data = encoder.encode(self._header_list) # encode header list
self._flag = self.flag # get flag by method
if self._is_padded:
headers_frame_field.append(self._pad_len) # append pad length
self._data += bytearray(self._pad_len) # append pad byte in pad length
if self._is_priority:
headers_frame_field += int_to_bytes(self._dependency_id, 4) # append dependency stream id
headers_frame_field.append(self._weight)
self._data = headers_frame_field + self._data # append HEADERS field
return Frame.get_frame_bin(self)
def test_resizing_header_table(self):
# We need to encode a substantial number of headers, to populate the
# header table.
e = Encoder()
header_set = [
(':method', 'GET'),
(':scheme', 'https'),
(':path', '/some/path'),
(':authority', 'www.example.com'),
('custom-key', 'custom-value'),
(
"user-agent",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:16.0) "
"Gecko/20100101 Firefox/16.0",
),
(
"accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;"
"q=0.8",
),
('X-Lukasa-Test', '88989'),
]
e.encode(header_set, huffman=True)
# Resize the header table to a size so small that nothing can be in it.
e.header_table_size = 40
assert len(e.header_table.dynamic_entries) == 0
def test_ordering_applies_to_encoding(self, special_keys, boring_keys):
"""
When encoding a dictionary the special keys all appear first.
"""
def _prepend_colon(k):
if isinstance(k, unicode):
return u':' + k
else:
return b':' + k
special_keys = set(map(_prepend_colon, special_keys))
input_dict = {
k: b'testval'
for k in itertools.chain(special_keys, boring_keys)
}
e = Encoder()
d = Decoder()
encoded = e.encode(input_dict)
decoded = iter(d.decode(encoded, raw=True))
received_special = set()
received_boring = set()
expected_special = set(map(_to_bytes, special_keys))
expected_boring = set(map(_to_bytes, boring_keys))
for _ in special_keys:
k, _ = next(decoded)
received_special.add(k)
for _ in boring_keys:
k, _ = next(decoded)
received_boring.add(k)
assert expected_special == received_special
assert expected_boring == received_boring
def get_encoder(self):
"""
Returns a HPACK encoder set up for responses.
"""
e = Encoder()
e.huffman_coder = HuffmanEncoder(REQUEST_CODES, REQUEST_CODES_LENGTH)
return e
def test_resizing_header_table(self):
# We need to encode a substantial number of headers, to populate the
# header table.
e = Encoder()
header_set = [
(':method', 'GET'),
(':scheme', 'https'),
(':path', '/some/path'),
(':authority', 'www.example.com'),
('custom-key', 'custom-value'),
(
"user-agent",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:16.0) "
"Gecko/20100101 Firefox/16.0",
),
(
"accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;"
"q=0.8",
),
('X-Lukasa-Test', '88989'),
]
e.encode(header_set, huffman=True)
# Resize the header table to a size so small that nothing can be in it.
e.header_table_size = 40
assert len(e.header_table.dynamic_entries) == 0
def build_headers_frame(headers, encoder=None):
f = HeadersFrame(1)
e = encoder
if e is None:
e = Encoder()
e.huffman_coder = HuffmanEncoder(REQUEST_CODES, REQUEST_CODES_LENGTH)
f.data = e.encode(headers)
f.flags.add('END_HEADERS')
return f
def test_evicting_header_table_objects(self):
e = Encoder()
# Set the header table size large enough to include one header.
e.header_table_size = 66
header_set = [('a', 'b'), ('long-custom-header', 'longish value')]
e.encode(header_set)
assert len(e.header_table.dynamic_entries) == 1
def test_evicting_header_table_objects(self):
e = Encoder()
# Set the header table size large enough to include one header.
e.header_table_size = 66
header_set = [('a', 'b'), ('long-custom-header', 'longish value')]
e.encode(header_set)
assert len(e.header_table.dynamic_entries) == 1
def build_headers_frame(headers, encoder=None):
f = HeadersFrame(1)
e = encoder
if e is None:
e = Encoder()
e.huffman_coder = HuffmanEncoder(REQUEST_CODES, REQUEST_CODES_LENGTH)
f.data = e.encode(headers)
f.flags.add('END_HEADERS')
return f
def test_request_examples_with_huffman(self):
"""
This section shows the same examples as the previous section, but
using Huffman encoding for the literal values.
"""
e = Encoder()
first_header_set = [
(':method', 'GET',),
(':scheme', 'http',),
(':path', '/',),
(':authority', 'www.example.com'),
]
first_header_table = [(':authority', 'www.example.com')]
first_result = (
b'\x82\x86\x84\x41\x8c\xf1\xe3\xc2\xe5\xf2:k\xa0\xab\x90\xf4\xff'
)
assert e.encode(first_header_set, huffman=True) == first_result
assert list(e.header_table.dynamic_entries) == [
(n.encode('utf-8'), v.encode('utf-8'))
for n, v in first_header_table
]
second_header_table = [
('cache-control', 'no-cache'),
(':authority', 'www.example.com')
]
second_header_set = [
(':method', 'GET',),
(':scheme', 'http',),
(':path', '/',),
(':authority', 'www.example.com',),
('cache-control', 'no-cache'),
]
second_result = b'\x82\x86\x84\xbeX\x86\xa8\xeb\x10d\x9c\xbf'
assert e.encode(second_header_set, huffman=True) == second_result
assert list(e.header_table.dynamic_entries) == [
(n.encode('utf-8'), v.encode('utf-8'))
for n, v in second_header_table
]
third_header_set = [
(':method', 'GET',),
(':scheme', 'https',),
(':path', '/index.html',),
(':authority', 'www.example.com',),
('custom-key', 'custom-value'),
]
third_result = (
b'\x82\x87\x85\xbf'
b'@\x88%\xa8I\xe9[\xa9}\x7f\x89%\xa8I\xe9[\xb8\xe8\xb4\xbf'
)
assert e.encode(third_header_set, huffman=True) == third_result
assert len(e.header_table.dynamic_entries) == 3
def test_request_examples_without_huffman(self):
"""
This section shows several consecutive header sets, corresponding to
HTTP requests, on the same connection.
"""
e = Encoder()
first_header_set = [
(':method', 'GET',),
(':scheme', 'http',),
(':path', '/',),
(':authority', 'www.example.com'),
]
# We should have :authority in first_header_table since we index it
first_header_table = [(':authority', 'www.example.com')]
first_result = b'\x82\x86\x84\x41\x0fwww.example.com'
assert e.encode(first_header_set, huffman=False) == first_result
assert list(e.header_table.dynamic_entries) == [
(n.encode('utf-8'), v.encode('utf-8'))
for n, v in first_header_table
]
second_header_set = [
(':method', 'GET',),
(':scheme', 'http',),
(':path', '/',),
(':authority', 'www.example.com',),
('cache-control', 'no-cache'),
]
second_header_table = [
('cache-control', 'no-cache'),
(':authority', 'www.example.com')
]
second_result = b'\x82\x86\x84\xbeX\x08no-cache'
assert e.encode(second_header_set, huffman=False) == second_result
assert list(e.header_table.dynamic_entries) == [
(n.encode('utf-8'), v.encode('utf-8'))
for n, v in second_header_table
]
third_header_set = [
(':method', 'GET',),
(':scheme', 'https',),
(':path', '/index.html',),
(':authority', 'www.example.com',),
('custom-key', 'custom-value'),
]
third_result = (
b'\x82\x87\x85\xbf@\ncustom-key\x0ccustom-value'
)
assert e.encode(third_header_set, huffman=False) == third_result
# Don't check the header table here, it's just too complex to be
# reliable. Check its length though.
assert len(e.header_table.dynamic_entries) == 3
def test_resizing_header_table_sends_multiple_updates(self):
e = Encoder()
e.header_table_size = 40
e.header_table_size = 100
e.header_table_size = 40
header_set = [(':method', 'GET')]
out = e.encode(header_set, huffman=True)
assert out == b'\x3F\x09\x3F\x45\x3F\x09\x82'
def test_resizing_header_table_sends_multiple_updates(self):
e = Encoder()
e.header_table_size = 40
e.header_table_size = 100
e.header_table_size = 40
header_set = [(':method', 'GET')]
out = e.encode(header_set, huffman=True)
assert out == b'\x3F\x09\x3F\x45\x3F\x09\x82'
def test_indexed_header_field_from_static_table(self):
e = Encoder()
e.header_table_size = 0
header_set = {':method': 'GET'}
result = b'\x82'
# Make sure we don't emit an encoding context update.
e.header_table.resized = False
assert e.encode(header_set, huffman=False) == result
assert list(e.header_table.dynamic_entries) == []
def test_indexed_header_field_from_static_table(self):
e = Encoder()
e.header_table_size = 0
header_set = {':method': 'GET'}
result = b'\x82'
# Make sure we don't emit an encoding context update.
e.header_table.resized = False
assert e.encode(header_set, huffman=False) == result
assert list(e.header_table.dynamic_entries) == []
def test_literal_header_field_without_indexing(self):
"""
The header field representation uses an indexed name and a literal
value.
"""
e = Encoder()
header_set = {':path': '/sample/path'}
result = b'\x04\x0c/sample/path'
assert e.encode(header_set, huffman=False) == result
assert list(e.header_table) == []
def test_indexed_header_field(self):
"""
The header field representation uses an indexed header field, from
the static table.
"""
e = Encoder()
header_set = {':method': 'GET'}
result = b'\x82'
assert e.encode(header_set, huffman=False) == result
assert list(e.header_table.dynamic_entries) == []
def test_literal_header_field_without_indexing(self):
"""
The header field representation uses an indexed name and a literal
value.
"""
e = Encoder()
header_set = {':path': '/sample/path'}
result = b'\x04\x0c/sample/path'
assert e.encode(header_set, huffman=False) == result
assert list(e.header_table) == []
def test_indexed_header_field(self):
"""
The header field representation uses an indexed header field, from
the static table.
"""
e = Encoder()
header_set = {':method': 'GET'}
result = b'\x82'
assert e.encode(header_set, huffman=False) == result
assert list(e.header_table.dynamic_entries) == []
def test_setting_table_size_to_the_same_does_nothing(self):
e = Encoder()
# Set the header table size to the default.
e.header_table_size = 4096
# Now encode a header set. Just a small one, with a well-defined
# output.
header_set = [(':method', 'GET')]
out = e.encode(header_set, huffman=True)
assert out == b'\x82'
def test_literal_header_field_with_indexing(self):
"""
The header field representation uses a literal name and a literal
value.
"""
e = Encoder()
header_set = {'custom-key': 'custom-header'}
result = b'\x40\x0acustom-key\x0dcustom-header'
assert e.encode(header_set, huffman=False) == result
assert list(e.header_table) == [(n.encode('utf-8'), v.encode('utf-8'))
for n, v in header_set.items()]
def test_resizing_header_table_sends_context_update(self):
e = Encoder()
# Resize the header table to a size so small that nothing can be in it.
e.header_table_size = 40
# Now, encode a header set. Just a small one, with a well-defined
# output.
header_set = [(':method', 'GET')]
out = e.encode(header_set, huffman=True)
assert out == b'?\t\x82'
def test_can_encode_a_story_with_huffman(self, raw_story):
d = Decoder()
e = Encoder()
for case in raw_story['cases']:
# The input headers are a list of dicts, which is annoying.
input_headers = [(item[0], item[1]) for header in case['headers'] for item in header.items()]
encoded = e.encode(input_headers, huffman=True)
decoded_headers = d.decode(encoded)
assert input_headers == decoded_headers
def test_setting_table_size_to_the_same_does_nothing(self):
e = Encoder()
# Set the header table size to the default.
e.header_table_size = 4096
# Now encode a header set. Just a small one, with a well-defined
# output.
header_set = [(':method', 'GET')]
out = e.encode(header_set, huffman=True)
assert out == b'\x82'
def test_resizing_header_table_sends_context_update(self):
e = Encoder()
# Resize the header table to a size so small that nothing can be in it.
e.header_table_size = 40
# Now, encode a header set. Just a small one, with a well-defined
# output.
header_set = [(':method', 'GET')]
out = e.encode(header_set, huffman=True)
assert out == b'?\t\x82'
def test_can_encode_a_story_with_huffman(self, raw_story):
d = Decoder()
e = Encoder()
for case in raw_story['cases']:
# The input headers are a list of dicts, which is annoying.
input_headers = [(item[0], item[1]) for header in case['headers']
for item in header.items()]
encoded = e.encode(input_headers, huffman=True)
decoded_headers = d.decode(encoded)
assert input_headers == decoded_headers
def test_indexed_literal_header_field_with_indexing(self):
"""
The header field representation uses an indexed name and a literal
value and performs incremental indexing.
"""
e = Encoder()
header_set = {':path': '/sample/path'}
result = b'\x44\x0c/sample/path'
assert e.encode(header_set, huffman=False) == result
assert list(e.header_table.dynamic_entries) == [
(n.encode('utf-8'), v.encode('utf-8')) for n, v in header_set.items()
]
def test_literal_header_field_with_indexing(self):
"""
The header field representation uses a literal name and a literal
value.
"""
e = Encoder()
header_set = {'custom-key': 'custom-header'}
result = b'\x40\x0acustom-key\x0dcustom-header'
assert e.encode(header_set, huffman=False) == result
assert list(e.header_table.dynamic_entries) == [
(n.encode('utf-8'), v.encode('utf-8')) for n, v in header_set.items()
]
def test_indexed_literal_header_field_with_indexing(self):
"""
The header field representation uses an indexed name and a literal
value and performs incremental indexing.
"""
e = Encoder()
header_set = {':path': '/sample/path'}
result = b'\x44\x0c/sample/path'
assert e.encode(header_set, huffman=False) == result
assert list(e.header_table.dynamic_entries) == [
(n.encode('utf-8'), v.encode('utf-8'))
for n, v in header_set.items()
]
def test_sensitive_headers(self):
"""
Test encoding header values
"""
e = Encoder()
result = (b'\x82\x14\x88\x63\xa1\xa9' + b'\x32\x08\x73\xd0\xc7\x10' +
b'\x87\x25\xa8\x49\xe9\xea' + b'\x5f\x5f\x89\x41\x6a\x41' +
b'\x92\x6e\xe5\x35\x52\x9f')
header_set = [
(':method', 'GET', True),
(':path', '/jimiscool/', True),
('customkey', 'sensitiveinfo', True),
]
assert e.encode(header_set, huffman=True) == result
def test_sensitive_headers_with_header_tuples(self):
"""
A header field stored in a NeverIndexedHeaderTuple emits a
representation that forbids indexing.
"""
e = Encoder()
result = (b'\x82\x14\x88\x63\xa1\xa9' + b'\x32\x08\x73\xd0\xc7\x10' +
b'\x87\x25\xa8\x49\xe9\xea' + b'\x5f\x5f\x89\x41\x6a\x41' +
b'\x92\x6e\xe5\x35\x52\x9f')
header_set = [
NeverIndexedHeaderTuple(':method', 'GET'),
NeverIndexedHeaderTuple(':path', '/jimiscool/'),
NeverIndexedHeaderTuple('customkey', 'sensitiveinfo'),
]
assert e.encode(header_set, huffman=True) == result
def socket_handler(listener):
sock = listener.accept()[0]
e = Encoder()
# 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.
f = build_headers_frame([(':status', '200'),
('content-length', '14')], 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([('trialing', 'no'), ('trailing', 'sure')],
e)
f.flags.add('END_STREAM')
f.stream_id = 1
sock.send(f.serialize())
# Wait for the message from the main thread.
recv_event.set()
sock.close()
def test_sensitive_headers(self):
"""
Test encoding header values
"""
e = Encoder()
result = (b'\x82\x14\x88\x63\xa1\xa9' +
b'\x32\x08\x73\xd0\xc7\x10' +
b'\x87\x25\xa8\x49\xe9\xea' +
b'\x5f\x5f\x89\x41\x6a\x41' +
b'\x92\x6e\xe5\x35\x52\x9f')
header_set = [
(':method', 'GET', True),
(':path', '/jimiscool/', True),
('customkey','sensitiveinfo',True)
]
assert e.encode(header_set, huffman=True) == result
def __init__(self, local_settings=None):
super(H2Connection, self).__init__()
self.encoder = Encoder()
self.decoder = Decoder()
self.streams = {}
self.local_settings = Settings(local_settings)
self.remote_settings = Settings()
# 接收数据窗口
self.inbound_flow_control_window = self.local_settings.initial_window_size
self.inbound_window_manager = WindowManager(self.local_settings.initial_window_size)
# 发送数据窗口（根据对端接受能力，取决于对端设置）
self.outbound_flow_control_window = self.remote_settings.initial_window_size
self.__set_encoder()
self.__set_decoder()
# 接收数据缓冲区
self.inbound_buffer = FrameBuffer(self.local_settings.max_frame_size)
# 待发送的数据缓冲区
self._data_to_send = b''
self.__dispatch_table = {
SettingsFrame: self._receive_settings_frame,
HeadersFrame: self._receive_headers_frame,
DataFrame: self._receive_data_frame,
WindowUpdateFrame: self.receive_window_update_frame,
GoAwayFrame: self.receive_goaway_frame,
RstStreamFrame: self._receive_rst_stream_frame,
PingFrame: self._receive_ping_frame
}
def __init__(self,
state=None,
length=0,
flags=FLAG_NO_FLAGS,
stream_id=0x0):
valid_flags = reduce(lambda x, y: x | y, self.VALID_FLAGS, 0x0)
if flags | valid_flags != valid_flags:
raise ValueError('invalid flags detected.')
if state is None:
class State(object):
pass
state = State()
state.http2_settings = HTTP2_DEFAULT_SETTINGS.copy()
state.encoder = Encoder()
state.decoder = Decoder()
self.state = state
self.length = length
self.type = self.TYPE
self.flags = flags
self.stream_id = stream_id
def test_sensitive_headers_with_header_tuples(self):
"""
A header field stored in a NeverIndexedHeaderTuple emits a
representation that forbids indexing.
"""
e = Encoder()
result = (b'\x82\x14\x88\x63\xa1\xa9' +
b'\x32\x08\x73\xd0\xc7\x10' +
b'\x87\x25\xa8\x49\xe9\xea' +
b'\x5f\x5f\x89\x41\x6a\x41' +
b'\x92\x6e\xe5\x35\x52\x9f')
header_set = [
NeverIndexedHeaderTuple(':method', 'GET'),
NeverIndexedHeaderTuple(':path', '/jimiscool/'),
NeverIndexedHeaderTuple('customkey', 'sensitiveinfo'),
]
assert e.encode(header_set, huffman=True) == result
def test_can_encode_a_story_no_huffman(self, raw_story):
d = Decoder()
e = Encoder()
for case in raw_story['cases']:
# The input headers are a list of dicts, which is annoying.
input_headers = [
(item[0], item[1])
for header in case['headers']
for item in header.items()
]
encoded = e.encode(input_headers, huffman=False)
decoded_headers = d.decode(encoded)
assert input_headers == decoded_headers
assert all(
isinstance(header, HeaderTuple) for header in decoded_headers
)
def __init__(self, tcp_handler, is_server=False, dump_frames=False):
self.tcp_handler = tcp_handler
self.is_server = is_server
self.http2_settings = frame.HTTP2_DEFAULT_SETTINGS.copy()
self.current_stream_id = None
self.encoder = Encoder()
self.decoder = Decoder()
self.connection_preface_performed = False
self.dump_frames = dump_frames
def __init__(self, client_side=True):
self.state_machine = H2ConnectionStateMachine()
self.streams = {}
self.highest_inbound_stream_id = 0
self.highest_outbound_stream_id = 0
self.encoder = Encoder()
self.decoder = Decoder()
self.client_side = client_side
# Objects that store settings, including defaults.
self.local_settings = Settings(client=client_side)
self.remote_settings = Settings(client=not client_side)
# The curent value of the connection flow control windows on the
# connection.
self.outbound_flow_control_window = (
self.remote_settings.initial_window_size)
self.inbound_flow_control_window = (
self.local_settings.initial_window_size)
#: The maximum size of a frame that can be emitted by this peer, in
#: bytes.
self.max_outbound_frame_size = self.remote_settings.max_frame_size
#: The maximum size of a frame that can be received by this peer, in
#: bytes.
self.max_inbound_frame_size = self.local_settings.max_frame_size
# Buffer for incoming data.
self.incoming_buffer = FrameBuffer(server=not client_side)
# A private variable to store a sequence of received header frames
# until completion.
self._header_frames = []
# Data that needs to be sent.
self._data_to_send = b''
# When in doubt use dict-dispatch.
self._frame_dispatch_table = {
HeadersFrame: self._receive_headers_frame,
PushPromiseFrame: self._receive_push_promise_frame,
SettingsFrame: self._receive_settings_frame,
DataFrame: self._receive_data_frame,
WindowUpdateFrame: self._receive_window_update_frame,
PingFrame: self._receive_ping_frame,
RstStreamFrame: self._receive_rst_stream_frame,
PriorityFrame: self._receive_priority_frame,
GoAwayFrame: self._receive_goaway_frame,
ContinuationFrame: self._receive_naked_continuation,
}
def test_ordering_applies_to_encoding(self, special_keys, boring_keys):
"""
When encoding a dictionary the special keys all appear first.
"""
def _prepend_colon(k):
if isinstance(k, unicode):
return u':' + k
else:
return b':' + k
special_keys = set(map(_prepend_colon, special_keys))
input_dict = {
k: b'testval' for k in itertools.chain(
special_keys,
boring_keys
)
}
e = Encoder()
d = Decoder()
encoded = e.encode(input_dict)
decoded = iter(d.decode(encoded, raw=True))
received_special = set()
received_boring = set()
expected_special = set(map(_to_bytes, special_keys))
expected_boring = set(map(_to_bytes, boring_keys))
for _ in special_keys:
k, _ = next(decoded)
received_special.add(k)
for _ in boring_keys:
k, _ = next(decoded)
received_boring.add(k)
assert expected_special == received_special
assert expected_boring == received_boring
def test_resizing_header_table_to_same_size_ignored(self):
e = Encoder()
# These size changes should be ignored
e.header_table_size = 4096
e.header_table_size = 4096
e.header_table_size = 4096
# These size changes should be encoded
e.header_table_size = 40
e.header_table_size = 100
e.header_table_size = 40
header_set = [(':method', 'GET')]
out = e.encode(header_set, huffman=True)
assert out == b'\x3F\x09\x3F\x45\x3F\x09\x82'
def __init__(
self,
tcp_handler=None,
rfile=None,
wfile=None,
is_server=False,
dump_frames=False,
encoder=None,
decoder=None,
unhandled_frame_cb=None,
):
self.tcp_handler = tcp_handler or TCPHandler(rfile, wfile)
self.is_server = is_server
self.dump_frames = dump_frames
self.encoder = encoder or Encoder()
self.decoder = decoder or Decoder()
self.unhandled_frame_cb = unhandled_frame_cb
self.http2_settings = self.HTTP2_DEFAULT_SETTINGS.copy()
self.current_stream_id = None
self.connection_preface_performed = False
def test_resizing_header_table_to_same_size_ignored(self):
e = Encoder()
# These size changes should be ignored
e.header_table_size = 4096
e.header_table_size = 4096
e.header_table_size = 4096
# These size changes should be encoded
e.header_table_size = 40
e.header_table_size = 100
e.header_table_size = 40
header_set = [(':method', 'GET')]
out = e.encode(header_set, huffman=True)
assert out == b'\x3F\x09\x3F\x45\x3F\x09\x82'
def test_case19(self):
"""
http://httpwg.org/specs/rfc7540.html#StreamStates
"""
print("[ TEST CASE 19 ]----------------------------------")
data = self.__read_from_socket()
print("< {}".format(self.__parse_client_request(data)))
print("> [SETTINGS]")
self.send_data([http2.setting()])
data = self.__read_from_socket()
print("< {}".format(self.__parse_client_request(data)))
print("> [HEADERS]")
small_get_index_html_header = {
":method" : "GET",
":scheme" : "http",
":path" : "/index.html",
":authority": "localhost",
"host" : "localhost"
}
header_data = Encoder().encode(small_get_index_html_header, huffman=False)
self.send_data([http2.headers(END_HEADERS = True, header_block_fragment = header_data)])
data = self.__read_from_socket()
print("< {}".format(self.__parse_client_request(data)))
print("> [PUSH_PROMISE]")
self.send_data([http2.push_promise(END_HEADERS = False)])
data = self.__read_from_socket()
print("< {}".format(self.__parse_client_request(data)))
def refresh_encoder(self):
self.encoder = Encoder()
class FrameFactory(object):
"""
A class containing lots of helper methods and state to build frames. This
allows test cases to easily build correct HTTP/2 frames to feed to
hyper-h2.
"""
def __init__(self):
self.encoder = Encoder()
def refresh_encoder(self):
self.encoder = Encoder()
def preamble(self):
return b'PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n'
def build_headers_frame(self, headers, flags=[], stream_id=1):
"""
Builds a single valid headers frame out of the contained headers.
"""
f = HeadersFrame(stream_id)
f.data = self.encoder.encode(headers)
f.flags.add('END_HEADERS')
for flag in flags:
f.flags.add(flag)
return f
def build_data_frame(self, data, flags=None, stream_id=1):
"""
Builds a single data frame out of a chunk of data.
"""
flags = set(flags) if flags is not None else set()
f = DataFrame(stream_id)
f.data = data
f.flags = flags
return f
def build_settings_frame(self, settings, ack=False):
"""
Builds a single settings frame.
"""
f = SettingsFrame(0)
if ack:
f.flags.add('ACK')
f.settings = settings
return f
def build_window_update_frame(self, stream_id, increment):
"""
Builds a single WindowUpdate frame.
"""
f = WindowUpdateFrame(stream_id)
f.window_increment = increment
return f
def build_ping_frame(self, ping_data, flags=None):
"""
Builds a single Ping frame.
"""
f = PingFrame(0)
f.opaque_data = ping_data
if flags:
f.flags = set(flags)
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 build_rst_stream_frame(self, stream_id, error_code=0):
"""
Builds a single RST_STREAM frame.
"""
f = RstStreamFrame(stream_id)
f.error_code = error_code
return f
def build_push_promise_frame(self,
stream_id,
promised_stream_id,
headers,
flags=[]):
"""
Builds a single PUSH_PROMISE frame.
"""
f = PushPromiseFrame(stream_id)
f.promised_stream_id = promised_stream_id
f.data = self.encoder.encode(headers)
f.flags = set(flags)
return f
def build_priority_frame(self,
stream_id,
weight,
depends_on=0,
exclusive=False):
"""
Builds a single priority frame.
"""
f = PriorityFrame(stream_id)
f.depends_on = depends_on
f.stream_weight = weight
f.exclusive = exclusive
return f
class HTTP2Protocol(object):
ERROR_CODES = utils.BiDi(
NO_ERROR=0x0,
PROTOCOL_ERROR=0x1,
INTERNAL_ERROR=0x2,
FLOW_CONTROL_ERROR=0x3,
SETTINGS_TIMEOUT=0x4,
STREAM_CLOSED=0x5,
FRAME_SIZE_ERROR=0x6,
REFUSED_STREAM=0x7,
CANCEL=0x8,
COMPRESSION_ERROR=0x9,
CONNECT_ERROR=0xa,
ENHANCE_YOUR_CALM=0xb,
INADEQUATE_SECURITY=0xc,
HTTP_1_1_REQUIRED=0xd
)
# "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n"
CLIENT_CONNECTION_PREFACE =\
'505249202a20485454502f322e300d0a0d0a534d0d0a0d0a'.decode('hex')
ALPN_PROTO_H2 = 'h2'
def __init__(self, tcp_handler, is_server=False, dump_frames=False):
self.tcp_handler = tcp_handler
self.is_server = is_server
self.http2_settings = frame.HTTP2_DEFAULT_SETTINGS.copy()
self.current_stream_id = None
self.encoder = Encoder()
self.decoder = Decoder()
self.connection_preface_performed = False
self.dump_frames = dump_frames
def check_alpn(self):
alp = self.tcp_handler.get_alpn_proto_negotiated()
if alp != self.ALPN_PROTO_H2:
raise NotImplementedError(
"HTTP2Protocol can not handle unknown ALP: %s" % alp)
return True
def _receive_settings(self, hide=False):
while True:
frm = self.read_frame(hide)
if isinstance(frm, frame.SettingsFrame):
break
def _read_settings_ack(self, hide=False): # pragma no cover
while True:
frm = self.read_frame(hide)
if isinstance(frm, frame.SettingsFrame):
assert frm.flags & frame.Frame.FLAG_ACK
assert len(frm.settings) == 0
break
def perform_server_connection_preface(self, force=False):
if force or not self.connection_preface_performed:
self.connection_preface_performed = True
magic_length = len(self.CLIENT_CONNECTION_PREFACE)
magic = self.tcp_handler.rfile.safe_read(magic_length)
assert magic == self.CLIENT_CONNECTION_PREFACE
self.send_frame(frame.SettingsFrame(state=self), hide=True)
self._receive_settings(hide=True)
def perform_client_connection_preface(self, force=False):
if force or not self.connection_preface_performed:
self.connection_preface_performed = True
self.tcp_handler.wfile.write(self.CLIENT_CONNECTION_PREFACE)
self.send_frame(frame.SettingsFrame(state=self), hide=True)
self._receive_settings(hide=True)
def next_stream_id(self):
if self.current_stream_id is None:
if self.is_server:
# servers must use even stream ids
self.current_stream_id = 2
else:
# clients must use odd stream ids
self.current_stream_id = 1
else:
self.current_stream_id += 2
return self.current_stream_id
def send_frame(self, frm, hide=False):
raw_bytes = frm.to_bytes()
self.tcp_handler.wfile.write(raw_bytes)
self.tcp_handler.wfile.flush()
if not hide and self.dump_frames: # pragma no cover
print(frm.human_readable(">>"))
def read_frame(self, hide=False):
frm = frame.Frame.from_file(self.tcp_handler.rfile, self)
if not hide and self.dump_frames: # pragma no cover
print(frm.human_readable("<<"))
if isinstance(frm, frame.SettingsFrame) and not frm.flags & frame.Frame.FLAG_ACK:
self._apply_settings(frm.settings, hide)
return frm
def _apply_settings(self, settings, hide=False):
for setting, value in settings.items():
old_value = self.http2_settings[setting]
if not old_value:
old_value = '-'
self.http2_settings[setting] = value
frm = frame.SettingsFrame(
state=self,
flags=frame.Frame.FLAG_ACK)
self.send_frame(frm, hide)
# be liberal in what we expect from the other end
# to be more strict use: self._read_settings_ack(hide)
def _create_headers(self, headers, stream_id, end_stream=True):
# TODO: implement max frame size checks and sending in chunks
flags = frame.Frame.FLAG_END_HEADERS
if end_stream:
flags |= frame.Frame.FLAG_END_STREAM
header_block_fragment = self.encoder.encode(headers)
frm = frame.HeadersFrame(
state=self,
flags=flags,
stream_id=stream_id,
header_block_fragment=header_block_fragment)
if self.dump_frames: # pragma no cover
print(frm.human_readable(">>"))
return [frm.to_bytes()]
def _create_body(self, body, stream_id):
if body is None or len(body) == 0:
return b''
# TODO: implement max frame size checks and sending in chunks
# TODO: implement flow-control window
frm = frame.DataFrame(
state=self,
flags=frame.Frame.FLAG_END_STREAM,
stream_id=stream_id,
payload=body)
if self.dump_frames: # pragma no cover
print(frm.human_readable(">>"))
return [frm.to_bytes()]
def create_request(self, method, path, headers=None, body=None):
if headers is None:
headers = []
authority = self.tcp_handler.sni if self.tcp_handler.sni else self.tcp_handler.address.host
if self.tcp_handler.address.port != 443:
authority += ":%d" % self.tcp_handler.address.port
headers = [
(b':method', bytes(method)),
(b':path', bytes(path)),
(b':scheme', b'https'),
(b':authority', authority),
] + headers
stream_id = self.next_stream_id()
return list(itertools.chain(
self._create_headers(headers, stream_id, end_stream=(body is None)),
self._create_body(body, stream_id)))
def read_response(self):
stream_id_, headers, body = self._receive_transmission()
return headers[':status'], headers, body
def read_request(self):
return self._receive_transmission()
def _receive_transmission(self):
body_expected = True
stream_id = 0
header_block_fragment = b''
body = b''
while True:
frm = self.read_frame()
if isinstance(frm, frame.HeadersFrame)\
or isinstance(frm, frame.ContinuationFrame):
stream_id = frm.stream_id
header_block_fragment += frm.header_block_fragment
if frm.flags & frame.Frame.FLAG_END_STREAM:
body_expected = False
if frm.flags & frame.Frame.FLAG_END_HEADERS:
break
while body_expected:
frm = self.read_frame()
if isinstance(frm, frame.DataFrame):
body += frm.payload
if frm.flags & frame.Frame.FLAG_END_STREAM:
break
# TODO: implement window update & flow
headers = {}
for header, value in self.decoder.decode(header_block_fragment):
headers[header] = value
return stream_id, headers, body
def create_response(self, code, stream_id=None, headers=None, body=None):
if headers is None:
headers = []
headers = [(b':status', bytes(str(code)))] + headers
if not stream_id:
stream_id = self.next_stream_id()
return list(itertools.chain(
self._create_headers(headers, stream_id, end_stream=(body is None)),
self._create_body(body, stream_id),
))
def test_header_table_size_getter(self):
e = Encoder()
assert e.header_table_size == 4096
class FrameFactory(object):
"""
A class containing lots of helper methods and state to build frames. This
allows test cases to easily build correct HTTP/2 frames to feed to
hyper-h2.
"""
def __init__(self):
self.encoder = Encoder()
def refresh_encoder(self):
self.encoder = Encoder()
def preamble(self):
return b'PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n'
def build_headers_frame(self,
headers,
flags=[],
stream_id=1,
**priority_kwargs):
"""
Builds a single valid headers frame out of the contained headers.
"""
f = HeadersFrame(stream_id)
f.data = self.encoder.encode(headers)
f.flags.add('END_HEADERS')
for flag in flags:
f.flags.add(flag)
for k, v in priority_kwargs.items():
setattr(f, k, v)
return f
def build_continuation_frame(self, header_block, flags=[], stream_id=1):
"""
Builds a single continuation frame out of the binary header block.
"""
f = ContinuationFrame(stream_id)
f.data = header_block
f.flags = set(flags)
return f
def build_data_frame(self, data, flags=None, stream_id=1, padding_len=0):
"""
Builds a single data frame out of a chunk of data.
"""
flags = set(flags) if flags is not None else set()
f = DataFrame(stream_id)
f.data = data
f.flags = flags
if padding_len:
flags.add('PADDED')
f.pad_length = padding_len
return f
def build_settings_frame(self, settings, ack=False):
"""
Builds a single settings frame.
"""
f = SettingsFrame(0)
if ack:
f.flags.add('ACK')
f.settings = settings
return f
def build_window_update_frame(self, stream_id, increment):
"""
Builds a single WindowUpdate frame.
"""
f = WindowUpdateFrame(stream_id)
f.window_increment = increment
return f
def build_ping_frame(self, ping_data, flags=None):
"""
Builds a single Ping frame.
"""
f = PingFrame(0)
f.opaque_data = ping_data
if flags:
f.flags = set(flags)
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 build_rst_stream_frame(self, stream_id, error_code=0):
"""
Builds a single RST_STREAM frame.
"""
f = RstStreamFrame(stream_id)
f.error_code = error_code
return f
def build_push_promise_frame(self,
stream_id,
promised_stream_id,
headers,
flags=[]):
"""
Builds a single PUSH_PROMISE frame.
"""
f = PushPromiseFrame(stream_id)
f.promised_stream_id = promised_stream_id
f.data = self.encoder.encode(headers)
f.flags = set(flags)
f.flags.add('END_HEADERS')
return f
def build_priority_frame(self,
stream_id,
weight,
depends_on=0,
exclusive=False):
"""
Builds a single priority frame.
"""
f = PriorityFrame(stream_id)
f.depends_on = depends_on
f.stream_weight = weight
f.exclusive = exclusive
return f
def build_alt_svc_frame(self, stream_id, origin, field):
"""
Builds a single ALTSVC frame.
"""
f = AltSvcFrame(stream_id)
f.origin = origin
f.field = field
return f
def __init__(self):
self.encoder = Encoder()
def refresh_encoder(self):
self.encoder = Encoder()
class FrameFactory(object):
"""
A class containing lots of helper methods and state to build frames. This
allows test cases to easily build correct HTTP/2 frames to feed to
hyper-h2.
"""
def __init__(self):
self.encoder = Encoder()
def refresh_encoder(self):
self.encoder = Encoder()
def preamble(self):
return b'PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n'
def build_headers_frame(self,
headers,
flags=[],
stream_id=1,
**priority_kwargs):
"""
Builds a single valid headers frame out of the contained headers.
"""
f = HeadersFrame(stream_id)
f.data = self.encoder.encode(headers)
f.flags.add('END_HEADERS')
for flag in flags:
f.flags.add(flag)
for k, v in priority_kwargs.items():
setattr(f, k, v)
return f
def build_continuation_frame(self, header_block, flags=[], stream_id=1):
"""
Builds a single continuation frame out of the binary header block.
"""
f = ContinuationFrame(stream_id)
f.data = header_block
f.flags = set(flags)
return f
def build_data_frame(self, data, flags=None, stream_id=1, padding_len=0):
"""
Builds a single data frame out of a chunk of data.
"""
flags = set(flags) if flags is not None else set()
f = DataFrame(stream_id)
f.data = data
f.flags = flags
if padding_len:
flags.add('PADDED')
f.pad_length = padding_len
return f
def build_settings_frame(self, settings, ack=False):
"""
Builds a single settings frame.
"""
f = SettingsFrame(0)
if ack:
f.flags.add('ACK')
f.settings = settings
return f
def build_window_update_frame(self, stream_id, increment):
"""
Builds a single WindowUpdate frame.
"""
f = WindowUpdateFrame(stream_id)
f.window_increment = increment
return f
def build_ping_frame(self, ping_data, flags=None):
"""
Builds a single Ping frame.
"""
f = PingFrame(0)
f.opaque_data = ping_data
if flags:
f.flags = set(flags)
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 build_rst_stream_frame(self, stream_id, error_code=0):
"""
Builds a single RST_STREAM frame.
"""
f = RstStreamFrame(stream_id)
f.error_code = error_code
return f
def build_push_promise_frame(self,
stream_id,
promised_stream_id,
headers,
flags=[]):
"""
Builds a single PUSH_PROMISE frame.
"""
f = PushPromiseFrame(stream_id)
f.promised_stream_id = promised_stream_id
f.data = self.encoder.encode(headers)
f.flags = set(flags)
f.flags.add('END_HEADERS')
return f
def build_priority_frame(self,
stream_id,
weight,
depends_on=0,
exclusive=False):
"""
Builds a single priority frame.
"""
f = PriorityFrame(stream_id)
f.depends_on = depends_on
f.stream_weight = weight
f.exclusive = exclusive
return f
def build_alt_svc_frame(self, stream_id, origin, field):
"""
Builds a single ALTSVC frame.
"""
f = AltSvcFrame(stream_id)
f.origin = origin
f.field = field
return f
def change_table_size(self, new_size):
"""
Causes the encoder to send a dynamic size update in the next header
block it sends.
"""
self.encoder.header_table_size = new_size
def __init__(self):
self.encoder = Encoder()
def test_request_examples_without_huffman(self):
"""
This section shows several consecutive header sets, corresponding to
HTTP requests, on the same connection.
"""
e = Encoder()
first_header_set = [
(
':method',
'GET',
),
(
':scheme',
'http',
),
(
':path',
'/',
),
(':authority', 'www.example.com'),
]
# We should have :authority in first_header_table since we index it
first_header_table = [(':authority', 'www.example.com')]
first_result = b'\x82\x86\x84\x41\x0fwww.example.com'
assert e.encode(first_header_set, huffman=False) == first_result
assert list(e.header_table.dynamic_entries) == [
(n.encode('utf-8'), v.encode('utf-8'))
for n, v in first_header_table
]
second_header_set = [
(
':method',
'GET',
),
(
':scheme',
'http',
),
(
':path',
'/',
),
(
':authority',
'www.example.com',
),
('cache-control', 'no-cache'),
]
second_header_table = [('cache-control', 'no-cache'),
(':authority', 'www.example.com')]
second_result = b'\x82\x86\x84\xbeX\x08no-cache'
assert e.encode(second_header_set, huffman=False) == second_result
assert list(e.header_table.dynamic_entries) == [
(n.encode('utf-8'), v.encode('utf-8'))
for n, v in second_header_table
]
third_header_set = [
(
':method',
'GET',
),
(
':scheme',
'https',
),
(
':path',
'/index.html',
),
(
':authority',
'www.example.com',
),
('custom-key', 'custom-value'),
]
third_result = (b'\x82\x87\x85\xbf@\ncustom-key\x0ccustom-value')
assert e.encode(third_header_set, huffman=False) == third_result
# Don't check the header table here, it's just too complex to be
# reliable. Check its length though.
assert len(e.header_table.dynamic_entries) == 3
def test_request_examples_with_huffman(self):
"""
This section shows the same examples as the previous section, but
using Huffman encoding for the literal values.
"""
e = Encoder()
first_header_set = [
(
':method',
'GET',
),
(
':scheme',
'http',
),
(
':path',
'/',
),
(':authority', 'www.example.com'),
]
first_header_table = [(':authority', 'www.example.com')]
first_result = (
b'\x82\x86\x84\x41\x8c\xf1\xe3\xc2\xe5\xf2:k\xa0\xab\x90\xf4\xff')
assert e.encode(first_header_set, huffman=True) == first_result
assert list(e.header_table.dynamic_entries) == [
(n.encode('utf-8'), v.encode('utf-8'))
for n, v in first_header_table
]
second_header_table = [('cache-control', 'no-cache'),
(':authority', 'www.example.com')]
second_header_set = [
(
':method',
'GET',
),
(
':scheme',
'http',
),
(
':path',
'/',
),
(
':authority',
'www.example.com',
),
('cache-control', 'no-cache'),
]
second_result = b'\x82\x86\x84\xbeX\x86\xa8\xeb\x10d\x9c\xbf'
assert e.encode(second_header_set, huffman=True) == second_result
assert list(e.header_table.dynamic_entries) == [
(n.encode('utf-8'), v.encode('utf-8'))
for n, v in second_header_table
]
third_header_set = [
(
':method',
'GET',
),
(
':scheme',
'https',
),
(
':path',
'/index.html',
),
(
':authority',
'www.example.com',
),
('custom-key', 'custom-value'),
]
third_result = (
b'\x82\x87\x85\xbf'
b'@\x88%\xa8I\xe9[\xa9}\x7f\x89%\xa8I\xe9[\xb8\xe8\xb4\xbf')
assert e.encode(third_header_set, huffman=True) == third_result
assert len(e.header_table.dynamic_entries) == 3
