56
51
hooks: An instance of SmartServerHooks.
59
# This is the timeout on the socket we use .accept() on. It is exposed here
60
# so the test suite can set it faster. (It thread.interrupt_main() will not
61
# fire a KeyboardInterrupt during socket.accept)
63
_SHUTDOWN_POLL_TIMEOUT = 1.0
64
_LOG_WAITING_TIMEOUT = 10.0
68
def __init__(self, backing_transport, root_client_path='/',
54
def __init__(self, backing_transport, host='127.0.0.1', port=0,
55
root_client_path='/'):
70
56
"""Construct a new server.
72
58
To actually start it running, call either start_background_thread or
75
61
:param backing_transport: The transport to serve.
62
:param host: Name of the interface to listen on.
63
:param port: TCP port to listen on, or 0 to allocate a transient port.
76
64
:param root_client_path: The client path that will correspond to root
77
65
of backing_transport.
78
:param client_timeout: See SmartServerSocketStreamMedium's timeout
81
self.backing_transport = backing_transport
82
self.root_client_path = root_client_path
83
self._client_timeout = client_timeout
84
self._active_connections = []
85
# This is set to indicate we want to wait for clients to finish before
87
self._gracefully_stopping = False
89
def start_server(self, host, port):
90
"""Create the server listening socket.
92
:param host: Name of the interface to listen on.
93
:param port: TCP port to listen on, or 0 to allocate a transient port.
95
67
# let connections timeout so that we get a chance to terminate
96
68
# Keep a reference to the exceptions we want to catch because the socket
108
80
# SO_REUSERADDR has a different meaning on Windows
109
81
if sys.platform != 'win32':
110
82
self._server_socket.setsockopt(socket.SOL_SOCKET,
111
socket.SO_REUSEADDR, 1)
83
socket.SO_REUSEADDR, 1)
113
85
self._server_socket.bind(sockaddr)
114
except self._socket_error as message:
86
except self._socket_error, message:
115
87
raise errors.CannotBindAddress(host, port, message)
116
88
self._sockname = self._server_socket.getsockname()
117
89
self.port = self._sockname[1]
118
90
self._server_socket.listen(1)
119
self._server_socket.settimeout(self._ACCEPT_TIMEOUT)
120
# Once we start accept()ing connections, we set started.
91
self._server_socket.settimeout(1)
92
self.backing_transport = backing_transport
121
93
self._started = threading.Event()
122
# Once we stop accept()ing connections (and are closing the socket) we
124
94
self._stopped = threading.Event()
125
# Once we have finished waiting for all clients, etc. We set
127
self._fully_stopped = threading.Event()
95
self.root_client_path = root_client_path
129
def _backing_urls(self):
97
def serve(self, thread_name_suffix=''):
98
self._should_terminate = False
99
# for hooks we are letting code know that a server has started (and
130
101
# There are three interesting urls:
131
102
# The URL the server can be contacted on. (e.g. bzr://host/)
132
103
# The URL that a commit done on the same machine as the server will
133
104
# have within the servers space. (e.g. file:///home/user/source)
134
105
# The URL that will be given to other hooks in the same process -
135
# the URL of the backing transport itself. (e.g. filtered-36195:///)
106
# the URL of the backing transport itself. (e.g. chroot+:///)
136
107
# We need all three because:
137
108
# * other machines see the first
138
109
# * local commits on this machine should be able to be mapped to
142
113
# The latter two urls are different aliases to the servers url,
143
114
# so we group those in a list - as there might be more aliases
145
urls = [self.backing_transport.base]
116
backing_urls = [self.backing_transport.base]
147
urls.append(self.backing_transport.external_url())
118
backing_urls.append(self.backing_transport.external_url())
148
119
except errors.InProcessTransport:
152
def run_server_started_hooks(self, backing_urls=None):
153
if backing_urls is None:
154
backing_urls = self._backing_urls()
155
121
for hook in SmartTCPServer.hooks['server_started']:
156
122
hook(backing_urls, self.get_url())
157
123
for hook in SmartTCPServer.hooks['server_started_ex']:
158
124
hook(backing_urls, self)
160
def run_server_stopped_hooks(self, backing_urls=None):
161
if backing_urls is None:
162
backing_urls = self._backing_urls()
163
for hook in SmartTCPServer.hooks['server_stopped']:
164
hook(backing_urls, self.get_url())
166
def _stop_gracefully(self):
167
trace.note(gettext('Requested to stop gracefully'))
168
self._should_terminate = True
169
self._gracefully_stopping = True
170
for handler, _ in self._active_connections:
171
handler._stop_gracefully()
173
def _wait_for_clients_to_disconnect(self):
174
self._poll_active_connections()
175
if not self._active_connections:
177
trace.note(gettext('Waiting for %d client(s) to finish')
178
% (len(self._active_connections),))
179
t_next_log = self._timer() + self._LOG_WAITING_TIMEOUT
180
while self._active_connections:
182
if now >= t_next_log:
183
trace.note(gettext('Still waiting for %d client(s) to finish')
184
% (len(self._active_connections),))
185
t_next_log = now + self._LOG_WAITING_TIMEOUT
186
self._poll_active_connections(self._SHUTDOWN_POLL_TIMEOUT)
188
def serve(self, thread_name_suffix=''):
189
# Note: There is a temptation to do
190
# signals.register_on_hangup(id(self), self._stop_gracefully)
191
# However, that creates a temporary object which is a bound
192
# method. signals._on_sighup is a WeakKeyDictionary so it
193
# immediately gets garbage collected, because nothing else
194
# references it. Instead, we need to keep a real reference to the
195
# bound method for the lifetime of the serve() function.
196
stop_gracefully = self._stop_gracefully
197
signals.register_on_hangup(id(self), stop_gracefully)
198
self._should_terminate = False
199
# for hooks we are letting code know that a server has started (and
201
self.run_server_started_hooks()
202
125
self._started.set()
208
131
except self._socket_timeout:
209
132
# just check if we're asked to stop
211
except self._socket_error as e:
134
except self._socket_error, e:
212
135
# if the socket is closed by stop_background_thread
213
# we might get a EBADF here, or if we get a signal we
214
# can get EINTR, any other socket errors should get
216
if e.args[0] not in (errno.EBADF, errno.EINTR):
217
trace.warning(gettext("listening socket error: %s")
136
# we might get a EBADF here, any other socket errors
138
if e.args[0] != errno.EBADF:
139
trace.warning("listening socket error: %s", e)
220
141
if self._should_terminate:
223
143
self.serve_conn(conn, thread_name_suffix)
224
# Cleanout any threads that have finished processing.
225
self._poll_active_connections()
226
144
except KeyboardInterrupt:
227
145
# dont log when CTRL-C'd.
229
except Exception as e:
230
148
trace.report_exception(sys.exc_info(), sys.stderr)
234
153
# ensure the server socket is closed.
235
154
self._server_socket.close()
236
155
except self._socket_error:
237
156
# ignore errors on close
240
signals.unregister_on_hangup(id(self))
241
self.run_server_stopped_hooks()
242
if self._gracefully_stopping:
243
self._wait_for_clients_to_disconnect()
244
self._fully_stopped.set()
158
for hook in SmartTCPServer.hooks['server_stopped']:
159
hook(backing_urls, self.get_url())
246
161
def get_url(self):
247
162
"""Return the url of the server"""
248
return "bzr://%s:%s/" % (self._sockname[0], self._sockname[1])
250
def _make_handler(self, conn):
251
return medium.SmartServerSocketStreamMedium(
252
conn, self.backing_transport, self.root_client_path,
253
timeout=self._client_timeout)
255
def _poll_active_connections(self, timeout=0.0):
256
"""Check to see if any active connections have finished.
258
This will iterate through self._active_connections, and update any
259
connections that are finished.
261
:param timeout: The timeout to pass to thread.join(). By default, we
262
set it to 0, so that we don't hang if threads are not done yet.
266
for handler, thread in self._active_connections:
268
if thread.is_alive():
269
still_active.append((handler, thread))
270
self._active_connections = still_active
163
return "bzr://%s:%d/" % self._sockname
272
165
def serve_conn(self, conn, thread_name_suffix):
273
166
# For WIN32, where the timeout value from the listening socket
274
167
# propagates to the newly accepted socket.
275
168
conn.setblocking(True)
276
169
conn.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
170
handler = medium.SmartServerSocketStreamMedium(
171
conn, self.backing_transport, self.root_client_path)
277
172
thread_name = 'smart-server-child' + thread_name_suffix
278
handler = self._make_handler(conn)
279
173
connection_thread = threading.Thread(
280
174
None, handler.serve, name=thread_name)
281
self._active_connections.append((handler, connection_thread))
282
175
connection_thread.setDaemon(True)
283
176
connection_thread.start()
284
return connection_thread
286
178
def start_background_thread(self, thread_name_suffix=''):
287
179
self._started.clear()
288
180
self._server_thread = threading.Thread(None,
290
thread_name_suffix,),
291
name='server-' + self.get_url())
181
self.serve, args=(thread_name_suffix,),
182
name='server-' + self.get_url())
292
183
self._server_thread.setDaemon(True)
293
184
self._server_thread.start()
294
185
self._started.wait()
328
219
These are all empty initially, because by default nothing should get
331
Hooks.__init__(self, "breezy.bzr.smart.server", "SmartTCPServer.hooks")
332
self.add_hook('server_started',
333
"Called by the bzr server when it starts serving a directory. "
334
"server_started is called with (backing urls, public url), "
335
"where backing_url is a list of URLs giving the "
336
"server-specific directory locations, and public_url is the "
337
"public URL for the directory being served.", (0, 16))
338
self.add_hook('server_started_ex',
339
"Called by the bzr server when it starts serving a directory. "
340
"server_started is called with (backing_urls, server_obj).",
342
self.add_hook('server_stopped',
343
"Called by the bzr server when it stops serving a directory. "
344
"server_stopped is called with the same parameters as the "
345
"server_started hook: (backing_urls, public_url).", (0, 16))
346
self.add_hook('server_exception',
347
"Called by the bzr server when an exception occurs. "
348
"server_exception is called with the sys.exc_info() tuple "
349
"return true for the hook if the exception has been handled, "
350
"in which case the server will exit normally.", (2, 4))
223
self.create_hook(HookPoint('server_started',
224
"Called by the bzr server when it starts serving a directory. "
225
"server_started is called with (backing urls, public url), "
226
"where backing_url is a list of URLs giving the "
227
"server-specific directory locations, and public_url is the "
228
"public URL for the directory being served.", (0, 16), None))
229
self.create_hook(HookPoint('server_started_ex',
230
"Called by the bzr server when it starts serving a directory. "
231
"server_started is called with (backing_urls, server_obj).",
233
self.create_hook(HookPoint('server_stopped',
234
"Called by the bzr server when it stops serving a directory. "
235
"server_stopped is called with the same parameters as the "
236
"server_started hook: (backing_urls, public_url).", (0, 16), None))
353
238
SmartTCPServer.hooks = SmartServerHooks()
356
241
def _local_path_for_transport(transport):
357
242
"""Return a local path for transport, if reasonably possible.
359
244
This function works even if transport's url has a "readonly+" prefix,
360
245
unlike local_path_from_url.
362
247
This essentially recovers the --directory argument the user passed to "bzr
363
248
serve" from the transport passed to serve_bzr.
420
305
chroot_server = chroot.ChrootServer(transport)
421
306
chroot_server.start_server()
422
307
self.cleanups.append(chroot_server.stop_server)
423
transport = _mod_transport.get_transport_from_url(
424
chroot_server.get_url())
308
transport = get_transport(chroot_server.get_url())
425
309
if self.base_path is not None:
426
310
# Decorate the server's backing transport with a filter that can
427
311
# expand homedirs.
428
312
expand_userdirs = self._make_expand_userdirs_filter(transport)
429
313
expand_userdirs.start_server()
430
314
self.cleanups.append(expand_userdirs.stop_server)
431
transport = _mod_transport.get_transport_from_url(
432
expand_userdirs.get_url())
315
transport = get_transport(expand_userdirs.get_url())
433
316
self.transport = transport
435
def _get_stdin_stdout(self):
436
return sys.stdin.buffer, sys.stdout.buffer
438
def _make_smart_server(self, host, port, inet, timeout):
440
c = config.GlobalStack()
441
timeout = c.get('serve.client_timeout')
318
def _make_smart_server(self, host, port, inet):
443
stdin, stdout = self._get_stdin_stdout()
444
320
smart_server = medium.SmartServerPipeStreamMedium(
445
stdin, stdout, self.transport, timeout=timeout)
321
sys.stdin, sys.stdout, self.transport)
448
324
host = medium.BZR_DEFAULT_INTERFACE
450
326
port = medium.BZR_DEFAULT_PORT
451
smart_server = SmartTCPServer(self.transport,
452
client_timeout=timeout)
453
smart_server.start_server(host, port)
454
trace.note(gettext('listening on port: %s'),
455
str(smart_server.port))
327
smart_server = SmartTCPServer(self.transport, host=host, port=port)
328
trace.note('listening on port: %s' % smart_server.port)
456
329
self.smart_server = smart_server
458
331
def _change_globals(self):
459
from breezy import lockdir, ui
332
from bzrlib import lockdir, ui
460
333
# For the duration of this server, no UI output is permitted. note
461
334
# that this may cause problems with blackbox tests. This should be
462
335
# changed with care though, as we dont want to use bandwidth sending
463
336
# progress over stderr to smart server clients!
464
337
old_factory = ui.ui_factory
465
338
old_lockdir_timeout = lockdir._DEFAULT_TIMEOUT_SECONDS
467
339
def restore_default_ui_factory_and_lockdir_timeout():
468
340
ui.ui_factory = old_factory
469
341
lockdir._DEFAULT_TIMEOUT_SECONDS = old_lockdir_timeout
470
342
self.cleanups.append(restore_default_ui_factory_and_lockdir_timeout)
471
343
ui.ui_factory = ui.SilentUIFactory()
472
344
lockdir._DEFAULT_TIMEOUT_SECONDS = 0
473
orig = signals.install_sighup_handler()
475
def restore_signals():
476
signals.restore_sighup_handler(orig)
477
self.cleanups.append(restore_signals)
479
def set_up(self, transport, host, port, inet, timeout):
346
def set_up(self, transport, host, port, inet):
480
347
self._make_backing_transport(transport)
481
self._make_smart_server(host, port, inet, timeout)
348
self._make_smart_server(host, port, inet)
482
349
self._change_globals()
484
351
def tear_down(self):
489
def serve_bzr(transport, host=None, port=None, inet=False, timeout=None):
356
def serve_bzr(transport, host=None, port=None, inet=False):
490
357
"""This is the default implementation of 'bzr serve'.
492
359
It creates a TCP or pipe smart server on 'transport, and runs it. The
493
360
transport will be decorated with a chroot and pathfilter (using
494
361
os.path.expanduser).
496
363
bzr_server = BzrServerFactory()
498
bzr_server.set_up(transport, host, port, inet, timeout)
365
bzr_server.set_up(transport, host, port, inet)
499
366
bzr_server.smart_server.serve()
501
hook_caught_exception = False
502
for hook in SmartTCPServer.hooks['server_exception']:
503
hook_caught_exception = hook(sys.exc_info())
504
if not hook_caught_exception:
507
368
bzr_server.tear_down()