11130Szelenkov@nginx.comimport random
21130Szelenkov@nginx.comimport base64
31130Szelenkov@nginx.comimport struct
41130Szelenkov@nginx.comimport select
51130Szelenkov@nginx.comimport hashlib
61130Szelenkov@nginx.comimport itertools
71130Szelenkov@nginx.comfrom unit.applications.proto import TestApplicationProto
81130Szelenkov@nginx.com
91130Szelenkov@nginx.comGUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
101130Szelenkov@nginx.com
111130Szelenkov@nginx.com
121130Szelenkov@nginx.comclass TestApplicationWebsocket(TestApplicationProto):
131130Szelenkov@nginx.com
141130Szelenkov@nginx.com    OP_CONT = 0x00
151130Szelenkov@nginx.com    OP_TEXT = 0x01
161130Szelenkov@nginx.com    OP_BINARY = 0x02
171130Szelenkov@nginx.com    OP_CLOSE = 0x08
181130Szelenkov@nginx.com    OP_PING = 0x09
191130Szelenkov@nginx.com    OP_PONG = 0x0A
201130Szelenkov@nginx.com    CLOSE_CODES = [1000, 1001, 1002, 1003, 1007, 1008, 1009, 1010, 1011]
211130Szelenkov@nginx.com
221130Szelenkov@nginx.com    def __init__(self, preinit=False):
231130Szelenkov@nginx.com        self.preinit = preinit
241130Szelenkov@nginx.com
251130Szelenkov@nginx.com    def key(self):
261130Szelenkov@nginx.com        raw_key = bytes(random.getrandbits(8) for _ in range(16))
271130Szelenkov@nginx.com        return base64.b64encode(raw_key).decode()
281130Szelenkov@nginx.com
291130Szelenkov@nginx.com    def accept(self, key):
301130Szelenkov@nginx.com        sha1 = hashlib.sha1((key + GUID).encode()).digest()
311130Szelenkov@nginx.com        return base64.b64encode(sha1).decode()
321130Szelenkov@nginx.com
331130Szelenkov@nginx.com    def upgrade(self):
341130Szelenkov@nginx.com        key = self.key()
351130Szelenkov@nginx.com
361130Szelenkov@nginx.com        if self.preinit:
371130Szelenkov@nginx.com            self.get()
381130Szelenkov@nginx.com
391130Szelenkov@nginx.com        resp, sock = self.get(
401130Szelenkov@nginx.com            headers={
411130Szelenkov@nginx.com                'Host': 'localhost',
421130Szelenkov@nginx.com                'Upgrade': 'websocket',
431130Szelenkov@nginx.com                'Connection': 'Upgrade',
441130Szelenkov@nginx.com                'Sec-WebSocket-Key': key,
451130Szelenkov@nginx.com                'Sec-WebSocket-Protocol': 'chat',
461130Szelenkov@nginx.com                'Sec-WebSocket-Version': 13,
471130Szelenkov@nginx.com            },
481130Szelenkov@nginx.com            read_timeout=1,
491130Szelenkov@nginx.com            start=True,
501130Szelenkov@nginx.com        )
511130Szelenkov@nginx.com
521130Szelenkov@nginx.com        return (resp, sock, key)
531130Szelenkov@nginx.com
541130Szelenkov@nginx.com    def apply_mask(self, data, mask):
551130Szelenkov@nginx.com        return bytes(b ^ m for b, m in zip(data, itertools.cycle(mask)))
561130Szelenkov@nginx.com
57*1150Szelenkov@nginx.com    def serialize_close(self, code=1000, reason=''):
581130Szelenkov@nginx.com        return struct.pack('!H', code) + reason.encode('utf-8')
591130Szelenkov@nginx.com
601138Szelenkov@nginx.com    def frame_read(self, sock, read_timeout=10):
611130Szelenkov@nginx.com        def recv_bytes(sock, bytes):
621130Szelenkov@nginx.com            data = b''
631130Szelenkov@nginx.com            while select.select([sock], [], [], read_timeout)[0]:
641130Szelenkov@nginx.com                try:
651130Szelenkov@nginx.com                    if bytes < 65536:
661130Szelenkov@nginx.com                        data = sock.recv(bytes)
671130Szelenkov@nginx.com                    else:
681130Szelenkov@nginx.com                        data = self.recvall(
69*1150Szelenkov@nginx.com                            sock, read_timeout=read_timeout, buff_size=bytes
701130Szelenkov@nginx.com                        )
711130Szelenkov@nginx.com                    break
721130Szelenkov@nginx.com                except:
731130Szelenkov@nginx.com                    break
741130Szelenkov@nginx.com
751130Szelenkov@nginx.com            return data
761130Szelenkov@nginx.com
771130Szelenkov@nginx.com        frame = {}
781130Szelenkov@nginx.com
791130Szelenkov@nginx.com        head1, = struct.unpack('!B', recv_bytes(sock, 1))
801130Szelenkov@nginx.com        head2, = struct.unpack('!B', recv_bytes(sock, 1))
811130Szelenkov@nginx.com
821130Szelenkov@nginx.com        frame['fin'] = bool(head1 & 0b10000000)
831130Szelenkov@nginx.com        frame['rsv1'] = bool(head1 & 0b01000000)
841130Szelenkov@nginx.com        frame['rsv2'] = bool(head1 & 0b00100000)
851130Szelenkov@nginx.com        frame['rsv3'] = bool(head1 & 0b00010000)
861130Szelenkov@nginx.com        frame['opcode'] = head1 & 0b00001111
871130Szelenkov@nginx.com        frame['mask'] = head2 & 0b10000000
881130Szelenkov@nginx.com
891130Szelenkov@nginx.com        length = head2 & 0b01111111
901130Szelenkov@nginx.com        if length == 126:
911130Szelenkov@nginx.com            data = recv_bytes(sock, 2)
921130Szelenkov@nginx.com            length, = struct.unpack('!H', data)
931130Szelenkov@nginx.com        elif length == 127:
941130Szelenkov@nginx.com            data = recv_bytes(sock, 8)
951130Szelenkov@nginx.com            length, = struct.unpack('!Q', data)
961130Szelenkov@nginx.com
971130Szelenkov@nginx.com        if frame['mask']:
981130Szelenkov@nginx.com            mask_bits = recv_bytes(sock, 4)
991130Szelenkov@nginx.com
1001130Szelenkov@nginx.com        data = recv_bytes(sock, length)
1011130Szelenkov@nginx.com        if frame['mask']:
1021130Szelenkov@nginx.com            data = self.apply_mask(data, mask_bits)
1031130Szelenkov@nginx.com
1041130Szelenkov@nginx.com        if frame['opcode'] == self.OP_CLOSE:
1051130Szelenkov@nginx.com            if length >= 2:
1061130Szelenkov@nginx.com                code, = struct.unpack('!H', data[:2])
1071130Szelenkov@nginx.com                reason = data[2:].decode('utf-8')
1081130Szelenkov@nginx.com                if not (code in self.CLOSE_CODES or 3000 <= code < 5000):
1091130Szelenkov@nginx.com                    self.fail('Invalid status code')
1101130Szelenkov@nginx.com                frame['code'] = code
1111130Szelenkov@nginx.com                frame['reason'] = reason
1121130Szelenkov@nginx.com            elif length == 0:
1131130Szelenkov@nginx.com                frame['code'] = 1005
1141130Szelenkov@nginx.com                frame['reason'] = ''
1151130Szelenkov@nginx.com            else:
1161130Szelenkov@nginx.com                self.fail('Close frame too short')
1171130Szelenkov@nginx.com
1181130Szelenkov@nginx.com        frame['data'] = data
1191130Szelenkov@nginx.com
1201130Szelenkov@nginx.com        if frame['mask']:
1211130Szelenkov@nginx.com            self.fail('Received frame with mask')
1221130Szelenkov@nginx.com
1231130Szelenkov@nginx.com        return frame
1241130Szelenkov@nginx.com
1251130Szelenkov@nginx.com    def frame_to_send(
1261130Szelenkov@nginx.com        self,
1271130Szelenkov@nginx.com        opcode,
1281130Szelenkov@nginx.com        data,
1291130Szelenkov@nginx.com        fin=True,
1301130Szelenkov@nginx.com        length=None,
1311130Szelenkov@nginx.com        rsv1=False,
1321130Szelenkov@nginx.com        rsv2=False,
1331130Szelenkov@nginx.com        rsv3=False,
1341130Szelenkov@nginx.com        mask=True,
1351130Szelenkov@nginx.com    ):
1361130Szelenkov@nginx.com        frame = b''
1371130Szelenkov@nginx.com
1381130Szelenkov@nginx.com        if isinstance(data, str):
1391130Szelenkov@nginx.com            data = data.encode('utf-8')
1401130Szelenkov@nginx.com
1411130Szelenkov@nginx.com        head1 = (
1421130Szelenkov@nginx.com            (0b10000000 if fin else 0)
1431130Szelenkov@nginx.com            | (0b01000000 if rsv1 else 0)
1441130Szelenkov@nginx.com            | (0b00100000 if rsv2 else 0)
1451130Szelenkov@nginx.com            | (0b00010000 if rsv3 else 0)
1461130Szelenkov@nginx.com            | opcode
1471130Szelenkov@nginx.com        )
1481130Szelenkov@nginx.com
1491130Szelenkov@nginx.com        head2 = 0b10000000 if mask else 0
1501130Szelenkov@nginx.com
1511130Szelenkov@nginx.com        data_length = len(data) if length is None else length
1521130Szelenkov@nginx.com        if data_length < 126:
1531130Szelenkov@nginx.com            frame += struct.pack('!BB', head1, head2 | data_length)
1541130Szelenkov@nginx.com        elif data_length < 65536:
1551130Szelenkov@nginx.com            frame += struct.pack('!BBH', head1, head2 | 126, data_length)
1561130Szelenkov@nginx.com        else:
1571130Szelenkov@nginx.com            frame += struct.pack('!BBQ', head1, head2 | 127, data_length)
1581130Szelenkov@nginx.com
1591130Szelenkov@nginx.com        if mask:
1601130Szelenkov@nginx.com            mask_bits = struct.pack('!I', random.getrandbits(32))
1611130Szelenkov@nginx.com            frame += mask_bits
1621130Szelenkov@nginx.com
1631130Szelenkov@nginx.com        if mask:
1641130Szelenkov@nginx.com            frame += self.apply_mask(data, mask_bits)
1651130Szelenkov@nginx.com        else:
1661130Szelenkov@nginx.com            frame += data
1671130Szelenkov@nginx.com
1681130Szelenkov@nginx.com        return frame
1691130Szelenkov@nginx.com
1701130Szelenkov@nginx.com    def frame_write(self, sock, *args, **kwargs):
1711130Szelenkov@nginx.com        chopsize = kwargs.pop('chopsize') if 'chopsize' in kwargs else None
1721130Szelenkov@nginx.com
1731130Szelenkov@nginx.com        frame = self.frame_to_send(*args, **kwargs)
1741130Szelenkov@nginx.com
1751130Szelenkov@nginx.com        if chopsize is None:
1761130Szelenkov@nginx.com            sock.sendall(frame)
1771130Szelenkov@nginx.com
1781130Szelenkov@nginx.com        else:
1791130Szelenkov@nginx.com            pos = 0
1801130Szelenkov@nginx.com            frame_len = len(frame)
181*1150Szelenkov@nginx.com            while pos < frame_len:
1821130Szelenkov@nginx.com                end = min(pos + chopsize, frame_len)
1831130Szelenkov@nginx.com                sock.sendall(frame[pos:end])
1841130Szelenkov@nginx.com                pos = end
1851130Szelenkov@nginx.com
1861130Szelenkov@nginx.com    def message(self, sock, type, message, fragmention_size=None, **kwargs):
1871130Szelenkov@nginx.com        message_len = len(message)
1881130Szelenkov@nginx.com
1891130Szelenkov@nginx.com        if fragmention_size is None:
1901130Szelenkov@nginx.com            fragmention_size = message_len
1911130Szelenkov@nginx.com
1921130Szelenkov@nginx.com        if message_len <= fragmention_size:
1931130Szelenkov@nginx.com            self.frame_write(sock, type, message, **kwargs)
1941130Szelenkov@nginx.com            return
1951130Szelenkov@nginx.com
1961130Szelenkov@nginx.com        pos = 0
1971130Szelenkov@nginx.com        op_code = type
198*1150Szelenkov@nginx.com        while pos < message_len:
1991130Szelenkov@nginx.com            end = min(pos + fragmention_size, message_len)
200*1150Szelenkov@nginx.com            fin = end == message_len
201*1150Szelenkov@nginx.com            self.frame_write(
202*1150Szelenkov@nginx.com                sock, op_code, message[pos:end], fin=fin, **kwargs
203*1150Szelenkov@nginx.com            )
2041130Szelenkov@nginx.com            op_code = self.OP_CONT
2051130Szelenkov@nginx.com            pos = end
2061130Szelenkov@nginx.com
2071138Szelenkov@nginx.com    def message_read(self, sock, read_timeout=10):
2081130Szelenkov@nginx.com        frame = self.frame_read(sock, read_timeout=read_timeout)
2091130Szelenkov@nginx.com
210*1150Szelenkov@nginx.com        while not frame['fin']:
2111130Szelenkov@nginx.com            temp = self.frame_read(sock, read_timeout=read_timeout)
2121130Szelenkov@nginx.com            frame['data'] += temp['data']
2131130Szelenkov@nginx.com            frame['fin'] = temp['fin']
2141130Szelenkov@nginx.com
2151130Szelenkov@nginx.com        return frame
216