1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
import re
import random
import base64
import struct
import select
import hashlib
import itertools
from unit.applications.proto import TestApplicationProto
GUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
class TestApplicationWebsocket(TestApplicationProto):
OP_CONT = 0x00
OP_TEXT = 0x01
OP_BINARY = 0x02
OP_CLOSE = 0x08
OP_PING = 0x09
OP_PONG = 0x0A
CLOSE_CODES = [1000, 1001, 1002, 1003, 1007, 1008, 1009, 1010, 1011]
def __init__(self, preinit=False):
self.preinit = preinit
def key(self):
raw_key = bytes(random.getrandbits(8) for _ in range(16))
return base64.b64encode(raw_key).decode()
def accept(self, key):
sha1 = hashlib.sha1((key + GUID).encode()).digest()
return base64.b64encode(sha1).decode()
def upgrade(self, headers=None):
key = None
if headers is None:
key = self.key()
headers = {
'Host': 'localhost',
'Upgrade': 'websocket',
'Connection': 'Upgrade',
'Sec-WebSocket-Key': key,
'Sec-WebSocket-Protocol': 'chat',
'Sec-WebSocket-Version': 13,
}
_, sock = self.get(
headers=headers,
no_recv=True,
start=True,
)
resp = ''
while True:
rlist = select.select([sock], [], [], 60)[0]
if not rlist:
self.fail('Can\'t read response from server.')
resp += sock.recv(4096).decode()
if (
re.search('101 Switching Protocols', resp)
and resp[-4:] == '\r\n\r\n'
):
resp = self._resp_to_dict(resp)
break
return (resp, sock, key)
def apply_mask(self, data, mask):
return bytes(b ^ m for b, m in zip(data, itertools.cycle(mask)))
def serialize_close(self, code=1000, reason=''):
return struct.pack('!H', code) + reason.encode('utf-8')
def frame_read(self, sock, read_timeout=60):
def recv_bytes(sock, bytes):
data = b''
while True:
rlist = select.select([sock], [], [], read_timeout)[0]
if not rlist:
# For all current cases if the "read_timeout" was changed
# than test do not expect to get a response from server.
if read_timeout == 60:
self.fail('Can\'t read response from server.')
break
data += sock.recv(bytes - len(data))
if len(data) == bytes:
break
return data
frame = {}
head1, = struct.unpack('!B', recv_bytes(sock, 1))
head2, = struct.unpack('!B', recv_bytes(sock, 1))
frame['fin'] = bool(head1 & 0b10000000)
frame['rsv1'] = bool(head1 & 0b01000000)
frame['rsv2'] = bool(head1 & 0b00100000)
frame['rsv3'] = bool(head1 & 0b00010000)
frame['opcode'] = head1 & 0b00001111
frame['mask'] = head2 & 0b10000000
length = head2 & 0b01111111
if length == 126:
data = recv_bytes(sock, 2)
length, = struct.unpack('!H', data)
elif length == 127:
data = recv_bytes(sock, 8)
length, = struct.unpack('!Q', data)
if frame['mask']:
mask_bits = recv_bytes(sock, 4)
data = b''
if length != 0:
data = recv_bytes(sock, length)
if frame['mask']:
data = self.apply_mask(data, mask_bits)
if frame['opcode'] == self.OP_CLOSE:
if length >= 2:
code, = struct.unpack('!H', data[:2])
reason = data[2:].decode('utf-8')
if not (code in self.CLOSE_CODES or 3000 <= code < 5000):
self.fail('Invalid status code')
frame['code'] = code
frame['reason'] = reason
elif length == 0:
frame['code'] = 1005
frame['reason'] = ''
else:
self.fail('Close frame too short')
frame['data'] = data
if frame['mask']:
self.fail('Received frame with mask')
return frame
def frame_to_send(
self,
opcode,
data,
fin=True,
length=None,
rsv1=False,
rsv2=False,
rsv3=False,
mask=True,
):
frame = b''
if isinstance(data, str):
data = data.encode('utf-8')
head1 = (
(0b10000000 if fin else 0)
| (0b01000000 if rsv1 else 0)
| (0b00100000 if rsv2 else 0)
| (0b00010000 if rsv3 else 0)
| opcode
)
head2 = 0b10000000 if mask else 0
data_length = len(data) if length is None else length
if data_length < 126:
frame += struct.pack('!BB', head1, head2 | data_length)
elif data_length < 65536:
frame += struct.pack('!BBH', head1, head2 | 126, data_length)
else:
frame += struct.pack('!BBQ', head1, head2 | 127, data_length)
if mask:
mask_bits = struct.pack('!I', random.getrandbits(32))
frame += mask_bits
if mask:
frame += self.apply_mask(data, mask_bits)
else:
frame += data
return frame
def frame_write(self, sock, *args, **kwargs):
chopsize = kwargs.pop('chopsize') if 'chopsize' in kwargs else None
frame = self.frame_to_send(*args, **kwargs)
if chopsize is None:
try:
sock.sendall(frame)
except BrokenPipeError:
pass
else:
pos = 0
frame_len = len(frame)
while pos < frame_len:
end = min(pos + chopsize, frame_len)
try:
sock.sendall(frame[pos:end])
except BrokenPipeError:
end = frame_len
pos = end
def message(self, sock, type, message, fragmention_size=None, **kwargs):
message_len = len(message)
if fragmention_size is None:
fragmention_size = message_len
if message_len <= fragmention_size:
self.frame_write(sock, type, message, **kwargs)
return
pos = 0
op_code = type
while pos < message_len:
end = min(pos + fragmention_size, message_len)
fin = end == message_len
self.frame_write(
sock, op_code, message[pos:end], fin=fin, **kwargs
)
op_code = self.OP_CONT
pos = end
def message_read(self, sock, read_timeout=60):
frame = self.frame_read(sock, read_timeout=read_timeout)
while not frame['fin']:
temp = self.frame_read(sock, read_timeout=read_timeout)
frame['data'] += temp['data']
frame['fin'] = temp['fin']
return frame
|
