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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Server for smart-server protocol."""
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from bzrlib.hooks import Hooks
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from bzrlib.smart import medium
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from bzrlib.hooks import HookPoint, Hooks
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from bzrlib import (
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from bzrlib.smart.medium import SmartServerSocketStreamMedium
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from bzrlib.smart import medium
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class SmartTCPServer(object):
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"""Listens on a TCP socket and accepts connections from smart clients
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"""Listens on a TCP socket and accepts connections from smart clients.
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Each connection will be served by a SmartServerSocketStreamMedium running in
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hooks: An instance of SmartServerHooks.
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def __init__(self, backing_transport, host='127.0.0.1', port=0):
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def __init__(self, backing_transport, host='127.0.0.1', port=0,
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root_client_path='/'):
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"""Construct a new server.
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To actually start it running, call either start_background_thread or
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:param backing_transport: The transport to serve.
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:param host: Name of the interface to listen on.
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:param port: TCP port to listen on, or 0 to allocate a transient port.
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:param root_client_path: The client path that will correspond to root
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# let connections timeout so that we get a chance to terminate
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# Keep a reference to the exceptions we want to catch because the socket
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from socket import error as socket_error
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self._socket_error = socket_error
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self._socket_timeout = socket_timeout
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self._server_socket = socket.socket()
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self._server_socket.bind((host, port))
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addrs = socket.getaddrinfo(host, port, socket.AF_UNSPEC,
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socket.SOCK_STREAM, 0, socket.AI_PASSIVE)[0]
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(family, socktype, proto, canonname, sockaddr) = addrs
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self._server_socket = socket.socket(family, socktype, proto)
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# SO_REUSERADDR has a different meaning on Windows
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if sys.platform != 'win32':
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self._server_socket.setsockopt(socket.SOL_SOCKET,
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socket.SO_REUSEADDR, 1)
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self._server_socket.bind(sockaddr)
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except self._socket_error, message:
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raise errors.CannotBindAddress(host, port, message)
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self._sockname = self._server_socket.getsockname()
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self.port = self._sockname[1]
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self._server_socket.listen(1)
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self.backing_transport = backing_transport
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self._started = threading.Event()
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self._stopped = threading.Event()
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self.root_client_path = root_client_path
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def serve(self, thread_name_suffix=''):
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self._should_terminate = False
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# for hooks we are letting code know that a server has started (and
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# There are three interesting urls:
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# The URL the server can be contacted on. (e.g. bzr://host/)
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# The URL that a commit done on the same machine as the server will
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# have within the servers space. (e.g. file:///home/user/source)
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# The URL that will be given to other hooks in the same process -
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# the URL of the backing transport itself. (e.g. chroot+:///)
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# We need all three because:
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# * other machines see the first
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# * local commits on this machine should be able to be mapped to
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# * commits the server does itself need to be mapped across to this
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# The latter two urls are different aliases to the servers url,
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# so we group those in a list - as there might be more aliases
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backing_urls = [self.backing_transport.base]
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backing_urls.append(self.backing_transport.external_url())
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except errors.InProcessTransport:
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for hook in SmartTCPServer.hooks['server_started']:
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hook(self.backing_transport.base, self.get_url())
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hook(backing_urls, self.get_url())
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self._started.set()
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# ignore errors on close
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for hook in SmartTCPServer.hooks['server_stopped']:
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hook(self.backing_transport.base, self.get_url())
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hook(backing_urls, self.get_url())
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def get_url(self):
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"""Return the url of the server"""
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return "bzr://%s:%d/" % self._sockname
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def serve_conn(self, conn):
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def serve_conn(self, conn, thread_name_suffix):
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# For WIN32, where the timeout value from the listening socket
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# propogates to the newly accepted socket.
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# propagates to the newly accepted socket.
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conn.setblocking(True)
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conn.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
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handler = SmartServerSocketStreamMedium(conn, self.backing_transport)
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connection_thread = threading.Thread(None, handler.serve, name='smart-server-child')
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handler = medium.SmartServerSocketStreamMedium(
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conn, self.backing_transport, self.root_client_path)
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thread_name = 'smart-server-child' + thread_name_suffix
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connection_thread = threading.Thread(
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None, handler.serve, name=thread_name)
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connection_thread.setDaemon(True)
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connection_thread.start()
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def start_background_thread(self):
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def start_background_thread(self, thread_name_suffix=''):
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self._started.clear()
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self._server_thread = threading.Thread(None,
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self.serve, args=(thread_name_suffix,),
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name='server-' + self.get_url())
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self._server_thread.setDaemon(True)
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self._server_thread.start()
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Hooks.__init__(self)
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# Introduced in 0.16:
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# invoked whenever the server starts serving a directory.
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# The api signature is (backing url, public url).
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self['server_started'] = []
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# Introduced in 0.16:
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# invoked whenever the server stops serving a directory.
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# The api signature is (backing url, public url).
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self['server_stopped'] = []
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self.create_hook(HookPoint('server_started',
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"Called by the bzr server when it starts serving a directory. "
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"server_started is called with (backing urls, public url), "
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"where backing_url is a list of URLs giving the "
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"server-specific directory locations, and public_url is the "
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"public URL for the directory being served.", (0, 16), None))
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self.create_hook(HookPoint('server_stopped',
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"Called by the bzr server when it stops serving a directory. "
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"server_stopped is called with the same parameters as the "
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"server_started hook: (backing_urls, public_url).", (0, 16), None))
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SmartTCPServer.hooks = SmartServerHooks()
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class SmartTCPServer_for_testing(SmartTCPServer):
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"""Server suitable for use by transport tests.
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This server is backed by the process's cwd.
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self._homedir = urlutils.local_path_to_url(os.getcwd())[7:]
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# The server is set up by default like for ssh access: the client
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# passes filesystem-absolute paths; therefore the server must look
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# them up relative to the root directory. it might be better to act
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# a public server and have the server rewrite paths into the test
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SmartTCPServer.__init__(self,
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transport.get_transport(urlutils.local_path_to_url('/')))
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def __init__(self, thread_name_suffix=''):
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SmartTCPServer.__init__(self, None)
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self.client_path_extra = None
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self.thread_name_suffix = thread_name_suffix
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def get_backing_transport(self, backing_transport_server):
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"""Get a backing transport from a server we are decorating."""
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return transport.get_transport(backing_transport_server.get_url())
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def setUp(self, backing_transport_server=None):
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"""Set up server for testing"""
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from bzrlib.transport.chroot import TestingChrootServer
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def setUp(self, backing_transport_server=None,
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client_path_extra='/extra/'):
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"""Set up server for testing.
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:param backing_transport_server: backing server to use. If not
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specified, a LocalURLServer at the current working directory will
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:param client_path_extra: a path segment starting with '/' to append to
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the root URL for this server. For instance, a value of '/foo/bar/'
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will mean the root of the backing transport will be published at a
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URL like `bzr://127.0.0.1:nnnn/foo/bar/`, rather than
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`bzr://127.0.0.1:nnnn/`. Default value is `extra`, so that tests
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by default will fail unless they do the necessary path translation.
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if not client_path_extra.startswith('/'):
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raise ValueError(client_path_extra)
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from bzrlib.transport.chroot import ChrootServer
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if backing_transport_server is None:
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from bzrlib.transport.local import LocalURLServer
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backing_transport_server = LocalURLServer()
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self.chroot_server = TestingChrootServer()
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self.chroot_server.setUp(backing_transport_server)
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self.chroot_server = ChrootServer(
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self.get_backing_transport(backing_transport_server))
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self.chroot_server.setUp()
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self.backing_transport = transport.get_transport(
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self.chroot_server.get_url())
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self.start_background_thread()
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self.root_client_path = self.client_path_extra = client_path_extra
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self.start_background_thread(self.thread_name_suffix)
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def tearDown(self):
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self.stop_background_thread()
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self.chroot_server.tearDown()
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url = super(SmartTCPServer_for_testing, self).get_url()
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return url[:-1] + self.client_path_extra
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def get_bogus_url(self):
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"""Return a URL which will fail to connect"""
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return 'bzr://127.0.0.1:1/'
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class ReadonlySmartTCPServer_for_testing(SmartTCPServer_for_testing):
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"""Get a readonly server for testing."""
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def get_backing_transport(self, backing_transport_server):
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"""Get a backing transport from a server we are decorating."""
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url = 'readonly+' + backing_transport_server.get_url()
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return transport.get_transport(url)
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class SmartTCPServer_for_testing_v2_only(SmartTCPServer_for_testing):
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"""A variation of SmartTCPServer_for_testing that limits the client to
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using RPCs in protocol v2 (i.e. bzr <= 1.5).
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url = super(SmartTCPServer_for_testing_v2_only, self).get_url()
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url = 'bzr-v2://' + url[len('bzr://'):]
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class ReadonlySmartTCPServer_for_testing_v2_only(SmartTCPServer_for_testing_v2_only):
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"""Get a readonly server for testing."""
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def get_backing_transport(self, backing_transport_server):
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"""Get a backing transport from a server we are decorating."""
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url = 'readonly+' + backing_transport_server.get_url()
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return transport.get_transport(url)
added
removed
bzrlib/smart/server.py
