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
|
"""
Echo server for test purposes.
This is usually invoked by starting this module as a script:
:command:`python -m Pyro5.test.echoserver`
or simply: :command:`pyro5-test-echoserver`
It is also possible to use the :class:`EchoServer` in user code
but that is not terribly useful.
Pyro - Python Remote Objects. Copyright by Irmen de Jong (irmen@razorvine.net).
"""
import sys
import time
import threading
from argparse import ArgumentParser
from .. import config, core, server, nameserver
__all__ = ["EchoServer"]
@server.expose
class EchoServer(object):
"""
The echo server object that is provided as a Pyro object by this module.
If its :attr:`verbose` attribute is set to ``True``, it will print messages as it receives calls.
"""
_verbose = False
_must_shutdown = False
def echo(self, message):
"""return the message"""
if self._verbose:
message_str = repr(message).encode(sys.stdout.encoding, errors="replace").decode(sys.stdout.encoding)
print("%s - echo: %s" % (time.asctime(), message_str))
return message
def error(self):
"""generates a simple exception without text"""
if self._verbose:
print("%s - error: generating exception" % time.asctime())
raise ValueError("this is the generated error from echoserver echo() method")
def error_with_text(self):
"""generates a simple exception with message"""
if self._verbose:
print("%s - error: generating exception" % time.asctime())
raise ValueError("the message of the error")
@server.oneway
def oneway_echo(self, message):
"""just like echo, but oneway; the client won't wait for response"""
if self._verbose:
message_str = repr(message).encode(sys.stdout.encoding, errors="replace").decode(sys.stdout.encoding)
print("%s - oneway_echo: %s" % (time.asctime(), message_str))
return "bogus return value"
def slow(self):
"""returns (and prints) a message after a certain delay"""
if self._verbose:
print("%s - slow: waiting a bit..." % time.asctime())
time.sleep(5)
if self._verbose:
print("%s - slow: returning result" % time.asctime())
return "Finally, an answer!"
def generator(self):
"""a generator function that returns some elements on demand"""
yield "one"
yield "two"
yield "three"
def nan(self):
return float("nan")
def inf(self):
return float("inf")
@server.oneway
def oneway_slow(self):
"""prints a message after a certain delay, and returns; but the client won't wait for it"""
if self._verbose:
print("%s - oneway_slow: waiting a bit..." % time.asctime())
time.sleep(5)
if self._verbose:
print("%s - oneway_slow: returning result" % time.asctime())
return "bogus return value"
def _private(self):
"""a 'private' method that should not be accessible"""
return "should not be allowed"
def __private(self):
"""another 'private' method that should not be accessible"""
return "should not be allowed"
def __dunder__(self):
"""a double underscore method that should be accessible normally"""
return "should be allowed (dunder)"
def shutdown(self):
"""called to signal the echo server to shut down"""
if self._verbose:
print("%s - shutting down" % time.asctime())
self._must_shutdown = True
@property
def verbose(self):
return self._verbose
@verbose.setter
def verbose(self, onoff):
self._verbose = bool(onoff)
class NameServer(threading.Thread):
def __init__(self, hostname):
super(NameServer, self).__init__()
self.daemon = True
self.hostname = hostname
self.started = threading.Event()
def run(self):
self.uri, self.ns_daemon, self.bc_server = nameserver.start_ns(self.hostname)
self.started.set()
if self.bc_server:
self.bc_server.runInThread()
self.ns_daemon.requestLoop()
def start_nameserver(host):
ns = NameServer(host)
ns.start()
ns.started.wait()
return ns
def main(args=None, returnWithoutLooping=False):
parser = ArgumentParser(description="Pyro test echo/nameserver command line launcher.")
parser.add_argument("-H", "--host", default="localhost", help="hostname to bind server on (default=%(default)s)")
parser.add_argument("-p", "--port", type=int, default=0, help="port to bind server on")
parser.add_argument("-u", "--unixsocket", help="Unix domain socket name to bind server on")
parser.add_argument("-n", "--naming", action="store_true", default=False, help="register with nameserver")
parser.add_argument("-N", "--nameserver", action="store_true", default=False, help="also start a nameserver")
parser.add_argument("-v", "--verbose", action="store_true", default=False, help="verbose output")
parser.add_argument("-q", "--quiet", action="store_true", default=False, help="don't output anything")
args = parser.parse_args(args)
if args.verbose:
args.quiet = False
if not args.quiet:
print("Starting Pyro's built-in test echo server.")
config.SERVERTYPE = "multiplex"
namesvr = None
if args.nameserver:
args.naming = True
namesvr = start_nameserver(args.host)
d = server.Daemon(host=args.host, port=args.port, unixsocket=args.unixsocket)
echo = EchoServer()
echo._verbose = args.verbose
objectName = "test.echoserver"
uri = d.register(echo, objectName)
if args.naming:
host, port = None, None
if namesvr is not None:
host, port = namesvr.uri.host, namesvr.uri.port
ns = core.locate_ns(host, port)
ns.register(objectName, uri)
if args.verbose:
print("using name server at %s" % ns._pyroUri)
if namesvr is not None:
if namesvr.bc_server:
print("broadcast server running at %s" % namesvr.bc_server.locationStr)
else:
print("not using a broadcast server")
else:
if args.verbose:
print("not using a name server.")
if not args.quiet:
print("object name: %s" % objectName)
print("echo uri: %s" % uri)
print("echoserver running.")
if returnWithoutLooping:
return d, echo, uri # for unit testing
else:
d.requestLoop(loopCondition=lambda: not echo._must_shutdown)
d.close()
if __name__ == "__main__":
main()
|
