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How to use _drop_local_namespace method in fMBT

Best Python code snippet using fMBT_python
server.py
Source:server.py
...228            _g_local_namespaces[ns] = init_code229            _g_local_namespaces[ns].update(clean_ns) # copy pythonshare defaults230        else:231            raise TypeError("unsupported init_code type")232def _drop_local_namespace(ns):233    daemon_log('drop local namespace "%s"' % (ns,))234    _g_local_namespaces[ns]["pythonshare_ns"].call_on_drop()235    del _g_local_namespaces[ns]236    del _g_local_namespace_locks[ns]237    del _g_async_rvs[ns]238    # send notification to all connections in _g_namespace_exports[ns]?239def _drop_remote_namespace(ns):240    daemon_log('drop remote namespace "%s"' % (ns,))241    try:242        rns = _g_remote_namespaces[ns]243        del _g_remote_namespaces[ns]244        rns.__del__()245    except KeyError:246        pass # already dropped247    # send notification to all connections in _g_namespace_exports[ns]?248def _init_remote_namespace(ns, conn, to_remote, from_remote):249    if ns in _g_remote_namespaces:250        raise ValueError('Remote namespace "%s" already registered' % (251            ns,))252    daemon_log('added remote namespace "%s", origin "%s"' % (253        ns, conn.getpeername()))254    _g_remote_namespaces[ns] = Pythonshare_rns(conn, to_remote, from_remote)255def _register_exported_namespace(ns, conn):256    if not ns in _g_namespace_exports:257        _g_namespace_exports[ns] = []258    _g_namespace_exports[ns].append(conn)259def _local_execute(exec_msg, conn_id=None):260    global _g_executing_pythonshare_conn_id261    ns = exec_msg.namespace262    if not ns in _g_local_namespaces:263        code_exc = expr_exc = "no local namespace %s" % (ns,)264        return messages.Exec_rv(code_exc, expr_exc, None)265    if conn_id:266        if not conn_id in _g_namespace_users:267            _g_namespace_users[conn_id] = set([ns])268        else:269            _g_namespace_users[conn_id].add(ns)270    code_exc, expr_exc, expr_rv = None, None, None271    if not exec_msg.lock or _g_local_namespace_locks[ns].acquire():272        _g_executing_pythonshare_conn_id = conn_id273        try:274            if exec_msg.code not in [None, ""]:275                try:276                    exec exec_msg.code in _g_local_namespaces[ns]277                except Exception, e:278                    code_exc = exception2string(sys.exc_info())279            if exec_msg.expr not in [None, ""]:280                try:281                    expr_rv = eval(exec_msg.expr, _g_local_namespaces[ns])282                except Exception, e:283                    expr_exc = exception2string(sys.exc_info())284        finally:285            _g_executing_pythonshare_conn_id = None286            if exec_msg.lock:287                try:288                    _g_local_namespace_locks[ns].release()289                except thread.error:290                    pass # already unlocked namespace291    else:292        code_exc = expr_exc = 'locking namespace "%s" failed' % (ns,)293    if isinstance(expr_rv, pythonshare.messages.Exec_rv):294        return expr_rv295    else:296        return messages.Exec_rv(code_exc, expr_exc, expr_rv)297def _local_async_execute(async_rv, exec_msg):298    exec_rv = _local_execute(exec_msg)299    _g_async_rvs[exec_msg.namespace][async_rv.rvid] = exec_rv300def _remote_execute(ns, exec_msg):301    rns = _g_remote_namespaces[ns]302    pythonshare._send(exec_msg, rns.to_remote)303    # _recv raises EOFError() if disconnected,304    # let it raise through.305    return pythonshare._recv(rns.from_remote)306def _remote_execute_and_forward(ns, exec_msg, to_client, peername=None):307    """returns (forward_status, info)308    forward_status values:309       True:  everything successfully forwarded,310              info contains pair (forwarded byte count, full length).311       False: not everything forwarded,312              info contains pair (forwarded byte count, full length).313              to_client file/socket is not functional.314       None:  no forwarding,315              info contains Exec_rv that should be sent normally.316    Raises EOFError if connection to remote namespace is not functional.317    The peername parameter is used for logging only.318    """319    client_supports_rv_info = exec_msg.recv_cap_data_info()320    exec_msg.set_recv_cap_data_info(True)321    rns = _g_remote_namespaces[ns]322    from_remote = rns.from_remote323    # Must keep simultaneously two locks:324    # - send lock on to_client325    # - recv lock on from_remote326    pythonshare._acquire_recv_lock(from_remote)327    try:328        pythonshare._send(exec_msg, rns.to_remote)329        response = pythonshare._recv(from_remote, acquire_recv_lock=False)330        if not isinstance(response, messages.Data_info):331            # Got direct response without forward mode332            return (None, response)333        pythonshare._acquire_send_lock(to_client)334        if client_supports_rv_info:335            # send data_info to client336            pythonshare._send(response, to_client, acquire_send_lock=False)337        try:338            if opt_debug and peername:339                daemon_log("%s:%s <= Exec_rv([forwarding %s B])" % (peername + (response.data_length,)))340            forwarded_bytes = pythonshare._forward(341                from_remote, to_client, response.data_length,342                acquire_recv_lock=False,343                acquire_send_lock=False)344            if forwarded_bytes == response.data_length:345                return (True, (forwarded_bytes, response.data_length))346            else:347                return (False, (forwarded_bytes, response.data_length))348        finally:349            pythonshare._release_send_lock(to_client)350    finally:351        exec_msg.set_recv_cap_data_info(client_supports_rv_info)352        pythonshare._release_recv_lock(from_remote)353def _connection_lost(conn_id, *closables):354    if closables:355        pythonshare._close(*closables)356    try:357        for ns in _g_namespace_users[conn_id]:358            try:359                _g_local_namespaces[ns]["pythonshare_ns"].call_on_disconnect(conn_id)360            except KeyError:361                pass362    except KeyError:363        pass364def _serve_connection(conn, conn_opts):365    global _g_async_rv_counter366    global _g_server_shutdown367    if isinstance(conn, client.Connection):368        to_client = conn._to_server369        from_client = conn._from_server370    else: # conn is a connected socket371        to_client = conn.makefile("w")372        from_client = conn.makefile("r")373    try:374        peername = conn.getpeername()375    except socket.error:376        peername = ("unknown", "?")377    if opt_debug:378        daemon_log("connected %s:%s" % peername)379    conn_id = "%s-%s" % (timestamp(), id(conn))380    auth_ok = False381    passwords = [k for k in conn_opts.keys() if k.startswith("password.")]382    kill_server_on_close = conn_opts.get("kill-server-on-close", False)383    if passwords:384        # password authentication is required for this connection385        try:386            received_password = pythonshare._recv(from_client)387        except Exception, e:388            daemon_log('error receiving password: %r' % (e,))389            received_password = None390        for password_type in passwords:391            algorithm = password_type.split(".")[1]392            if type(received_password) == str:393                if (algorithm == "plaintext" and394                    received_password == conn_opts[password_type]):395                    auth_ok = True396                elif (hasattr(hashlib, algorithm) and397                      getattr(hashlib, algorithm)(received_password).hexdigest() ==398                      conn_opts[password_type]):399                    auth_ok = True400        try:401            if auth_ok:402                pythonshare._send(messages.Auth_rv(True), to_client)403                if opt_debug:404                    daemon_log("%s:%s authentication ok" % peername)405            elif not received_password is None:406                pythonshare._send(messages.Auth_rv(False), to_client)407                if opt_debug:408                    daemon_log("%s:%s authentication failed" % peername)409        except socket.error:410            daemon_log("authentication failed due to socket error")411            auth_ok = False412    else:413        auth_ok = True # no password required414    whitelist_local = conn_opts.get("whitelist_local", None)415    while auth_ok:416        try:417            obj = pythonshare._recv(from_client)418            if opt_debug:419                daemon_log("%s:%s => %s" % (peername + (obj,)))420        except (EOFError, pythonshare.socket.error):421            break422        if isinstance(obj, messages.Register_ns):423            try:424                _init_remote_namespace(obj.ns, conn, to_client, from_client)425                pythonshare._send(messages.Ns_rv(True), to_client)426                # from this point on, this connection is reserved for427                # sending remote namespace traffic. The connection will be428                # used by other threads, this thread stops here.429                return430            except Exception, e:431                pythonshare._send(messages.Ns_rv(False, exception2string(sys.exc_info())), to_client)432        elif isinstance(obj, messages.Drop_ns):433            try:434                if obj.ns in _g_local_namespaces:435                    _drop_local_namespace(obj.ns)436                elif obj.ns in _g_remote_namespaces:437                    _drop_remote_namespace(obj.ns)438                else:439                    raise ValueError('Unknown namespace "%s"' % (obj.ns,))440                pythonshare._send(messages.Ns_rv(True), to_client)441            except Exception, e:442                if opt_debug:443                    daemon_log("namespace drop error: %s" % (e,))444                pythonshare._send(messages.Ns_rv(False, exception2string(sys.exc_info())), to_client)445        elif isinstance(obj, messages.Request_ns):446            ns = obj.ns447            if (ns in _g_remote_namespaces or448                ns in _g_local_namespaces):449                _register_exported_namespace(ns, conn)450                pythonshare._send(messages.Ns_rv(True), to_client)451                # from this point on, this connection is reserved for452                # receiving executions on requested namespace. This453                # thread starts serving the connection.454        elif isinstance(obj, messages.Exec):455            ns = obj.namespace456            if ns in _g_remote_namespaces: # execute in remote namespace457                try:458                    _fwd_status, _fwd_info = _remote_execute_and_forward(459                        ns, obj, to_client, peername)460                    if _fwd_status == True:461                        # successfully forwarded462                        if opt_debug:463                            daemon_log("%s:%s forwarded %s B" % (peername + (_fwd_info[0],)))464                        exec_rv = None # return value fully forwarded465                    elif _fwd_status == False:466                        # connection to client is broken467                        if opt_debug:468                            daemon_log("%s:%s error after forwarding %s/%s B" % (peername + _fwd_info))469                        break470                    elif _fwd_status is None:471                        # nothing forwarded, send return value by normal means472                        exec_rv = _fwd_info473                except (EOFError, socket.error):474                    daemon_log('connection lost to "%s"' % (ns,))475                    _drop_remote_namespace(ns)476                    break477            else: # execute in local namespace478                if whitelist_local == None or ns in whitelist_local:479                    _init_local_namespace(ns)480                if obj.async:481                    # asynchronous execution, return handle (Async_rv)482                    _g_async_rv_counter += 1483                    rvid = timestamp() + str(_g_async_rv_counter)484                    exec_rv = messages.Async_rv(ns, rvid)485                    _g_async_rvs[ns][rvid] = pythonshare.InProgress()486                    thread.start_new_thread(_local_async_execute, (exec_rv, obj))487                else:488                    # synchronous execution, return true return value489                    exec_rv = _local_execute(obj, conn_id)490            if not exec_rv is None:491                if opt_debug:492                    daemon_log("%s:%s <= %s" % (peername + (exec_rv,)))493                try:494                    try:495                        if obj.recv_cap_data_info():496                            info = pythonshare._send_opt(exec_rv, to_client, obj.recv_caps)497                            if info:498                                sent_info = " %s B, format:%s" % (499                                    info.data_length, info.data_format)500                            else:501                                sent_info = ""502                        else:503                            pythonshare._send(exec_rv, to_client)504                            sent_info = ""505                        if opt_debug:506                            daemon_log("%s:%s sent%s" % (peername + (sent_info,)))507                    except (EOFError, socket.error):508                        break509                except (TypeError, ValueError, cPickle.PicklingError): # pickling rv fails510                    exec_rv.expr_rv = messages.Unpicklable(exec_rv.expr_rv)511                    try:512                        pythonshare._send(exec_rv, to_client)513                    except (EOFError, socket.error):514                        break515        elif isinstance(obj, messages.Server_ctl):516            if obj.command == "die":517                ns = obj.args[0]518                if ns in _g_remote_namespaces:519                    try:520                        rv = _remote_execute(ns, obj)521                        if opt_debug:522                            daemon_log("%s:%s <= %s" % (peername + (rv,)))523                        pythonshare._send(rv, to_client)524                    except (EOFError, socket.error): # connection lost525                        daemon_log('connection lost to "%s"' % (ns,))526                        _drop_remote_namespace(ns)527                        break528                else:529                    _g_server_shutdown = True530                    server_ctl_rv = messages.Server_ctl_rv(0, "shutting down")531                    pythonshare._send(server_ctl_rv, to_client)532                    if _g_wake_server_function:533                        _g_wake_server_function()534                    break535            elif obj.command == "unlock":536                try:537                    ns = obj.args[0]538                    if ns in _g_remote_namespaces:539                        try:540                            rv = _remote_execute(ns, obj)541                        except (EOFError, socket.error): # connection lost542                            daemon_log('connection lost to "%s"' % (ns,))543                            _drop_remote_namespace(ns)544                            break545                    elif ns in _g_local_namespace_locks:546                        try:547                            _g_local_namespace_locks[ns].release()548                            server_ctl_rv = messages.Server_ctl_rv(549                                0, "%s unlocked" % (repr(ns),))550                        except thread.error, e:551                            server_ctl_rv = messages.Server_ctl_rv(552                                1, "%s already unlocked" %553                                (repr(ns),))554                    elif ns in _g_local_namespaces:555                        server_ctl_rv = messages.Server_ctl_rv(556                            2, "namespace %s is not locked" % (repr(ns),))557                    else:558                        server_ctl_rv = messages.Server_ctl_rv(559                            -1, "unknown namespace %s" % (repr(ns),))560                    if opt_debug:561                        daemon_log("%s:%s <= %s" % (peername + (server_ctl_rv,)))562                    pythonshare._send(server_ctl_rv, to_client)563                except Exception, e:564                    if opt_debug:565                        daemon_log("Exception in handling %s: %s" % (obj, e))566        else:567            daemon_log("unknown message type: %s in %s" % (type(obj), obj))568            pythonshare._send(messages.Auth_rv(False), to_client)569            auth_ok = False570    if opt_debug:571        daemon_log("disconnected %s:%s" % peername)572    _connection_lost(conn_id, to_client, from_client, conn)573    if kill_server_on_close:574        _g_server_shutdown = True575        if _g_wake_server_function:576            _g_wake_server_function()577def start_server(host, port,578                 ns_init_import_export=[],579                 conn_opts={},580                 listen_stdin=True):581    global _g_wake_server_function582    global _g_waker_lock583    daemon_log("pid: %s" % (os.getpid(),))584    # Initialise, import and export namespaces585    for task, ns, arg in ns_init_import_export:586        if task == "init":587            # If arg is a string, it will be executed in ns.588            # If arg is a dict, it will be used as ns.589            _init_local_namespace(ns, arg, force=True)590        elif task == "export":591            # Make sure ns exists before exporting.592            _init_local_namespace(ns, None, force=True)593            daemon_log('exporting "%s" to %s' % (ns, arg))594            try:595                c = pythonshare.connection(arg)596            except Exception, e:597                daemon_log('connecting to %s failed: %s' % (arg, e))598                return599            if c.export_ns(ns):600                _register_exported_namespace(ns, c)601                thread.start_new_thread(602                    _serve_connection, (c, {"kill-server-on-close": True}))603            else:604                raise ValueError('Export namespace "%s" to "%s" failed'605                                 % (ns, arg))606        elif task == "import":607            if (ns in _g_local_namespaces or608                ns in _g_remote_namespaces):609                raise ValueError('Import failed, namespace "%s" already exists'610                                 % (ns,))611            c = pythonshare.connection(arg)612            if c.import_ns(ns):613                _init_remote_namespace(ns, c, c._to_server, c._from_server)614    try:615        addrinfos = socket.getaddrinfo(host, port, socket.AF_INET, socket.SOCK_STREAM)616        for addrinfo in addrinfos:617            daemon_log("listen: %s:%s" % (addrinfo[4][0], addrinfo[4][1]))618    except socket.error:619        daemon_log("listen: %s:%s" % (host, port))620    if isinstance(port, int):621        def wake_server_function():622            _g_waker_lock.release() # wake up server623        _g_wake_server_function = wake_server_function624        _g_waker_lock = thread.allocate_lock()625        _g_waker_lock.acquire() # unlocked626        # Start listening to the port627        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)628        try:629            s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)630        except:631            pass632        s.bind((host, port))633        s.listen(4)634        event_queue = Queue.Queue()635        thread.start_new_thread(_store_return_value, (s.accept, event_queue))636        thread.start_new_thread(_store_return_value, (_g_waker_lock.acquire, event_queue))637        if not sys.stdin.closed and listen_stdin:638            daemon_log("listening to stdin")639            thread.start_new_thread(_read_lines_from_stdin, (event_queue,))640        else:641            daemon_log("not listening stdin")642        while 1:643            event = event_queue.get()644            if isinstance(event, tuple):645                # returned from s.accept646                conn, _ = event647                thread.start_new_thread(_serve_connection, (conn, conn_opts))648            elif event == True:649                # returned from _g_waker_lock.acquire650                daemon_log("shutting down.")651                break652            else:653                # returned from sys.stdin.readline654                pass655    elif port == "stdin":656        opt_debug_limit = 0657        if os.name == "nt":658            import msvcrt659            msvcrt.setmode(sys.stdin.fileno(), os.O_BINARY)660            msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)661        conn = client.Connection(sys.stdin, sys.stdout)662        _serve_connection(conn, conn_opts)663    for ns in sorted(_g_remote_namespaces.keys()):664        _drop_remote_namespace(ns)665    for ns in sorted(_g_local_namespaces.keys()):666        _drop_local_namespace(ns)667def start_daemon(host="localhost", port=8089, debug=False,668                 log_fd=None, ns_init_import_export=[], conn_opts={},669                 debug_limit=None):670    global opt_log_fd, opt_debug, opt_debug_limit671    opt_log_fd = log_fd672    opt_debug = debug673    if debug_limit != None:674        opt_debug_limit = debug_limit675    if opt_debug_limit > 0:676        messages.MSG_STRING_FIELD_MAX_LEN = max(opt_debug_limit/3-40, 40)677    else:678        messages.MSG_STRING_FIELD_MAX_LEN = None679    if opt_debug == False and not on_windows and isinstance(port, int):680        listen_stdin = False...
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