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
|
"""Test client that connects and sends infinite data."""
import argparse
import sys
from asyncio import *
from asyncio import test_utils
ARGS = argparse.ArgumentParser(description="TCP data sink example.")
ARGS.add_argument(
'--tls', action='store_true', dest='tls',
default=False, help='Use TLS')
ARGS.add_argument(
'--iocp', action='store_true', dest='iocp',
default=False, help='Use IOCP event loop (Windows only)')
ARGS.add_argument(
'--stop', action='store_true', dest='stop',
default=False, help='Stop the server by sending it b"stop" as data')
ARGS.add_argument(
'--host', action='store', dest='host',
default='127.0.0.1', help='Host name')
ARGS.add_argument(
'--port', action='store', dest='port',
default=1111, type=int, help='Port number')
ARGS.add_argument(
'--size', action='store', dest='size',
default=16*1024, type=int, help='Data size')
args = None
def dprint(*args):
print('source:', *args, file=sys.stderr)
class Client(Protocol):
total = 0
def connection_made(self, tr):
dprint('connecting to', tr.get_extra_info('peername'))
dprint('my socket is', tr.get_extra_info('sockname'))
self.tr = tr
self.lost = False
self.loop = get_event_loop()
self.waiter = Future()
if args.stop:
self.tr.write(b'stop')
self.tr.close()
else:
self.data = b'x'*args.size
self.write_some_data()
def write_some_data(self):
if self.lost:
dprint('lost already')
return
data = self.data
size = len(data)
self.total += size
dprint('writing', size, 'bytes; total', self.total)
self.tr.write(data)
self.loop.call_soon(self.write_some_data)
def connection_lost(self, exc):
dprint('lost connection', repr(exc))
self.lost = True
self.waiter.set_result(None)
@coroutine
def start(loop, host, port):
sslctx = None
if args.tls:
sslctx = test_utils.dummy_ssl_context()
tr, pr = yield from loop.create_connection(Client, host, port,
ssl=sslctx)
dprint('tr =', tr)
dprint('pr =', pr)
yield from pr.waiter
def main():
global args
args = ARGS.parse_args()
if args.iocp:
from asyncio.windows_events import ProactorEventLoop
loop = ProactorEventLoop()
set_event_loop(loop)
else:
loop = get_event_loop()
try:
loop.run_until_complete(start(loop, args.host, args.port))
finally:
loop.close()
if __name__ == '__main__':
main()
|
