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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Server for smart-server protocol."""
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from bzrlib.hooks import HookPoint, Hooks
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from bzrlib.hooks import Hooks
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from bzrlib.smart import medium
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from bzrlib import (
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transport as _mod_transport,
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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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from bzrlib.transport import (
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from bzrlib.smart.medium import SmartServerSocketStreamMedium
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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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Each connection will be served by a SmartServerSocketStreamMedium running in
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"""Listens on a TCP socket and accepts connections from smart clients
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hooks: An instance of SmartServerHooks.
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def __init__(self, backing_transport, root_client_path='/'):
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def __init__(self, backing_transport, host='127.0.0.1', port=0):
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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 root_client_path: The client path that will correspond to root
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self.backing_transport = backing_transport
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self.root_client_path = root_client_path
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def start_server(self, host, port):
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"""Create the server listening socket.
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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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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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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._server_socket = socket.socket()
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self._server_socket.bind((host, port))
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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._server_socket.settimeout(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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def _backing_urls(self):
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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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urls = [self.backing_transport.base]
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urls.append(self.backing_transport.external_url())
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except errors.InProcessTransport:
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def run_server_started_hooks(self, backing_urls=None):
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if backing_urls is None:
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backing_urls = self._backing_urls()
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self._should_terminate = False
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for hook in SmartTCPServer.hooks['server_started']:
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hook(backing_urls, self.get_url())
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for hook in SmartTCPServer.hooks['server_started_ex']:
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hook(backing_urls, self)
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def run_server_stopped_hooks(self, backing_urls=None):
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if backing_urls is None:
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backing_urls = self._backing_urls()
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for hook in SmartTCPServer.hooks['server_stopped']:
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hook(backing_urls, self.get_url())
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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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self.run_server_started_hooks()
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hook(self.backing_transport.base, self.get_url())
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self._started.set()
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except self._socket_error:
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# ignore errors on close
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self.run_server_stopped_hooks()
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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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def get_url(self):
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"""Return the url of the server"""
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return "bzr://%s:%s/" % (self._sockname[0], self._sockname[1])
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return "bzr://%s:%d/" % self._sockname
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def serve_conn(self, conn, thread_name_suffix):
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def serve_conn(self, conn):
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# For WIN32, where the timeout value from the listening socket
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# propagates to the newly accepted socket.
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# propogates 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 = 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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# FIXME: This thread is never joined, it should at least be collected
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# somewhere so that tests that want to check for leaked threads can get
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# rid of them -- vila 20100531
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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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connection_thread.setDaemon(True)
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connection_thread.start()
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return connection_thread
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def start_background_thread(self, thread_name_suffix=''):
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def start_background_thread(self):
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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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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_started_ex',
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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, server_obj).",
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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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# 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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SmartTCPServer.hooks = SmartServerHooks()
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def _local_path_for_transport(transport):
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"""Return a local path for transport, if reasonably possible.
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This function works even if transport's url has a "readonly+" prefix,
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unlike local_path_from_url.
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This essentially recovers the --directory argument the user passed to "bzr
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serve" from the transport passed to serve_bzr.
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base_url = transport.external_url()
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except (errors.InProcessTransport, NotImplementedError):
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# Strip readonly prefix
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if base_url.startswith('readonly+'):
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base_url = base_url[len('readonly+'):]
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return urlutils.local_path_from_url(base_url)
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except errors.InvalidURL:
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class BzrServerFactory(object):
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"""Helper class for serve_bzr."""
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def __init__(self, userdir_expander=None, get_base_path=None):
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self.base_path = None
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self.backing_transport = None
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if userdir_expander is None:
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userdir_expander = os.path.expanduser
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self.userdir_expander = userdir_expander
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if get_base_path is None:
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get_base_path = _local_path_for_transport
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self.get_base_path = get_base_path
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def _expand_userdirs(self, path):
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"""Translate /~/ or /~user/ to e.g. /home/foo, using
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self.userdir_expander (os.path.expanduser by default).
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If the translated path would fall outside base_path, or the path does
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not start with ~, then no translation is applied.
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If the path is inside, it is adjusted to be relative to the base path.
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e.g. if base_path is /home, and the expanded path is /home/joe, then
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the translated path is joe.
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if path.startswith('~'):
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expanded = self.userdir_expander(path)
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if not expanded.endswith('/'):
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if expanded.startswith(self.base_path):
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result = expanded[len(self.base_path):]
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def _make_expand_userdirs_filter(self, transport):
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return pathfilter.PathFilteringServer(transport, self._expand_userdirs)
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def _make_backing_transport(self, transport):
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"""Chroot transport, and decorate with userdir expander."""
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self.base_path = self.get_base_path(transport)
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chroot_server = chroot.ChrootServer(transport)
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chroot_server.start_server()
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self.cleanups.append(chroot_server.stop_server)
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transport = _mod_transport.get_transport(chroot_server.get_url())
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if self.base_path is not None:
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# Decorate the server's backing transport with a filter that can
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expand_userdirs = self._make_expand_userdirs_filter(transport)
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expand_userdirs.start_server()
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self.cleanups.append(expand_userdirs.stop_server)
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transport = _mod_transport.get_transport(expand_userdirs.get_url())
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self.transport = transport
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def _make_smart_server(self, host, port, inet):
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smart_server = medium.SmartServerPipeStreamMedium(
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sys.stdin, sys.stdout, self.transport)
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host = medium.BZR_DEFAULT_INTERFACE
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port = medium.BZR_DEFAULT_PORT
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smart_server = SmartTCPServer(self.transport)
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smart_server.start_server(host, port)
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trace.note('listening on port: %s' % smart_server.port)
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self.smart_server = smart_server
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def _change_globals(self):
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from bzrlib import lockdir, ui
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# For the duration of this server, no UI output is permitted. note
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# that this may cause problems with blackbox tests. This should be
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# changed with care though, as we dont want to use bandwidth sending
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# progress over stderr to smart server clients!
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old_factory = ui.ui_factory
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old_lockdir_timeout = lockdir._DEFAULT_TIMEOUT_SECONDS
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def restore_default_ui_factory_and_lockdir_timeout():
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ui.ui_factory = old_factory
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lockdir._DEFAULT_TIMEOUT_SECONDS = old_lockdir_timeout
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self.cleanups.append(restore_default_ui_factory_and_lockdir_timeout)
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ui.ui_factory = ui.SilentUIFactory()
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lockdir._DEFAULT_TIMEOUT_SECONDS = 0
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def set_up(self, transport, host, port, inet):
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self._make_backing_transport(transport)
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self._make_smart_server(host, port, inet)
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self._change_globals()
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for cleanup in reversed(self.cleanups):
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def serve_bzr(transport, host=None, port=None, inet=False):
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"""This is the default implementation of 'bzr serve'.
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It creates a TCP or pipe smart server on 'transport, and runs it. The
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transport will be decorated with a chroot and pathfilter (using
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bzr_server = BzrServerFactory()
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bzr_server.set_up(transport, host, port, inet)
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bzr_server.smart_server.serve()
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bzr_server.tear_down()
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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 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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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.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.stop_background_thread()
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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/'
added
removed
bzrlib/smart/server.py
