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# Copyright (c) 2017, 2022, Oracle and/or its affiliates. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License, version 2.0, as # published by the Free Software Foundation. # # This program is also distributed with certain software (including # but not limited to OpenSSL) that is licensed under separate terms, # as designated in a particular file or component or in included license # documentation. The authors of MySQL hereby grant you an # additional permission to link the program and your derivative works # with the separately licensed software that they have included with # MySQL. # # Without limiting anything contained in the foregoing, this file, # which is part of MySQL Connector/Python, is also subject to the # Universal FOSS Exception, version 1.0, a copy of which can be found at # http://oss.oracle.com/licenses/universal-foss-exception. # # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. # See the GNU General Public License, version 2.0, for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software Foundation, Inc., # 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA # mypy: disable-error-code="attr-defined,union-attr" """Implementation of a helper class for MySQL X Protobuf messages.""" # pylint: disable=c-extension-no-member, no-member from __future__ import annotations from typing import Any, Dict, List, Optional, Tuple, Type, Union from ..types import MessageType, ProtobufMessageCextType, ProtobufMessageType _SERVER_MESSAGES_TUPLES: Tuple[Tuple[str, str], ...] = ( ("Mysqlx.ServerMessages.Type.OK", "Mysqlx.Ok"), ("Mysqlx.ServerMessages.Type.ERROR", "Mysqlx.Error"), ( "Mysqlx.ServerMessages.Type.CONN_CAPABILITIES", "Mysqlx.Connection.Capabilities", ), ( "Mysqlx.ServerMessages.Type.SESS_AUTHENTICATE_CONTINUE", "Mysqlx.Session.AuthenticateContinue", ), ( "Mysqlx.ServerMessages.Type.SESS_AUTHENTICATE_OK", "Mysqlx.Session.AuthenticateOk", ), ("Mysqlx.ServerMessages.Type.NOTICE", "Mysqlx.Notice.Frame"), ( "Mysqlx.ServerMessages.Type.RESULTSET_COLUMN_META_DATA", "Mysqlx.Resultset.ColumnMetaData", ), ("Mysqlx.ServerMessages.Type.RESULTSET_ROW", "Mysqlx.Resultset.Row"), ( "Mysqlx.ServerMessages.Type.RESULTSET_FETCH_DONE", "Mysqlx.Resultset.FetchDone", ), ( "Mysqlx.ServerMessages.Type.RESULTSET_FETCH_SUSPENDED", "Mysqlx.Resultset.FetchSuspended", ), ( "Mysqlx.ServerMessages.Type.RESULTSET_FETCH_DONE_MORE_RESULTSETS", "Mysqlx.Resultset.FetchDoneMoreResultsets", ), ( "Mysqlx.ServerMessages.Type.SQL_STMT_EXECUTE_OK", "Mysqlx.Sql.StmtExecuteOk", ), ( "Mysqlx.ServerMessages.Type.RESULTSET_FETCH_DONE_MORE_OUT_PARAMS", "Mysqlx.Resultset.FetchDoneMoreOutParams", ), ( "Mysqlx.ServerMessages.Type.COMPRESSION", "Mysqlx.Connection.Compression", ), ) PROTOBUF_VERSION: Optional[str] = None PROTOBUF_REPEATED_TYPES: List[ Union[ Type[List[Dict[str, Any]]], Type[RepeatedCompositeContainer], Type[RepeatedCompositeFieldContainer], ] ] = [list] try: import _mysqlxpb SERVER_MESSAGES = { int(_mysqlxpb.enum_value(key)): val for key, val in _SERVER_MESSAGES_TUPLES } HAVE_MYSQLXPB_CEXT = True except ImportError: HAVE_MYSQLXPB_CEXT = False from ..helpers import BYTE_TYPES, NUMERIC_TYPES, encode_to_bytes try: from google import protobuf from google.protobuf import ( descriptor_database, descriptor_pb2, descriptor_pool, message_factory, ) from google.protobuf.internal.containers import RepeatedCompositeFieldContainer try: from google.protobuf.pyext._message import RepeatedCompositeContainer PROTOBUF_REPEATED_TYPES.append(RepeatedCompositeContainer) except ImportError: pass PROTOBUF_REPEATED_TYPES.append(RepeatedCompositeFieldContainer) if hasattr(protobuf, "__version__"): # Only Protobuf versions >=3.0.0 provide `__version__` PROTOBUF_VERSION = protobuf.__version__ from . import ( mysqlx_connection_pb2, mysqlx_crud_pb2, mysqlx_cursor_pb2, mysqlx_datatypes_pb2, mysqlx_expect_pb2, mysqlx_expr_pb2, mysqlx_notice_pb2, mysqlx_pb2, mysqlx_prepare_pb2, mysqlx_resultset_pb2, mysqlx_session_pb2, mysqlx_sql_pb2, ) # Dictionary with all messages descriptors _MESSAGES: Dict[str, int] = {} # Mysqlx for key, val in mysqlx_pb2.ClientMessages.Type.items(): _MESSAGES[f"Mysqlx.ClientMessages.Type.{key}"] = val for key, val in mysqlx_pb2.ServerMessages.Type.items(): _MESSAGES[f"Mysqlx.ServerMessages.Type.{key}"] = val for key, val in mysqlx_pb2.Error.Severity.items(): _MESSAGES[f"Mysqlx.Error.Severity.{key}"] = val # Mysqlx.Crud for key, val in mysqlx_crud_pb2.DataModel.items(): _MESSAGES[f"Mysqlx.Crud.DataModel.{key}"] = val for key, val in mysqlx_crud_pb2.Find.RowLock.items(): _MESSAGES[f"Mysqlx.Crud.Find.RowLock.{key}"] = val for key, val in mysqlx_crud_pb2.Order.Direction.items(): _MESSAGES[f"Mysqlx.Crud.Order.Direction.{key}"] = val for key, val in mysqlx_crud_pb2.UpdateOperation.UpdateType.items(): _MESSAGES[f"Mysqlx.Crud.UpdateOperation.UpdateType.{key}"] = val # Mysqlx.Datatypes for key, val in mysqlx_datatypes_pb2.Scalar.Type.items(): _MESSAGES[f"Mysqlx.Datatypes.Scalar.Type.{key}"] = val for key, val in mysqlx_datatypes_pb2.Any.Type.items(): _MESSAGES[f"Mysqlx.Datatypes.Any.Type.{key}"] = val # Mysqlx.Expect for key, val in mysqlx_expect_pb2.Open.Condition.ConditionOperation.items(): _MESSAGES[f"Mysqlx.Expect.Open.Condition.ConditionOperation.{key}"] = val for key, val in mysqlx_expect_pb2.Open.Condition.Key.items(): _MESSAGES[f"Mysqlx.Expect.Open.Condition.Key.{key}"] = val for key, val in mysqlx_expect_pb2.Open.CtxOperation.items(): _MESSAGES[f"Mysqlx.Expect.Open.CtxOperation.{key}"] = val # Mysqlx.Expr for key, val in mysqlx_expr_pb2.Expr.Type.items(): _MESSAGES[f"Mysqlx.Expr.Expr.Type.{key}"] = val for key, val in mysqlx_expr_pb2.DocumentPathItem.Type.items(): _MESSAGES[f"Mysqlx.Expr.DocumentPathItem.Type.{key}"] = val # Mysqlx.Notice for key, val in mysqlx_notice_pb2.Frame.Scope.items(): _MESSAGES[f"Mysqlx.Notice.Frame.Scope.{key}"] = val for key, val in mysqlx_notice_pb2.Warning.Level.items(): _MESSAGES[f"Mysqlx.Notice.Warning.Level.{key}"] = val for key, val in mysqlx_notice_pb2.SessionStateChanged.Parameter.items(): _MESSAGES[f"Mysqlx.Notice.SessionStateChanged.Parameter.{key}"] = val # Mysql.Prepare for key, val in mysqlx_prepare_pb2.Prepare.OneOfMessage.Type.items(): _MESSAGES[f"Mysqlx.Prepare.Prepare.OneOfMessage.Type.{key}"] = val # Mysql.Resultset for key, val in mysqlx_resultset_pb2.ColumnMetaData.FieldType.items(): _MESSAGES[f"Mysqlx.Resultset.ColumnMetaData.FieldType.{key}"] = val # Add messages to the descriptor pool _DESCRIPTOR_DB = descriptor_database.DescriptorDatabase() _DESCRIPTOR_POOL = descriptor_pool.DescriptorPool(_DESCRIPTOR_DB) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_connection_pb2.DESCRIPTOR.serialized_pb ) ) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_crud_pb2.DESCRIPTOR.serialized_pb ) ) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_cursor_pb2.DESCRIPTOR.serialized_pb ) ) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_datatypes_pb2.DESCRIPTOR.serialized_pb ) ) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_expect_pb2.DESCRIPTOR.serialized_pb ) ) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_expr_pb2.DESCRIPTOR.serialized_pb ) ) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_notice_pb2.DESCRIPTOR.serialized_pb ) ) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_pb2.DESCRIPTOR.serialized_pb ) ) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_prepare_pb2.DESCRIPTOR.serialized_pb ) ) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_resultset_pb2.DESCRIPTOR.serialized_pb ) ) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_session_pb2.DESCRIPTOR.serialized_pb ) ) _DESCRIPTOR_DB.Add( descriptor_pb2.FileDescriptorProto.FromString( mysqlx_sql_pb2.DESCRIPTOR.serialized_pb ) ) SERVER_MESSAGES = {_MESSAGES[key]: val for key, val in _SERVER_MESSAGES_TUPLES} HAVE_PROTOBUF = True HAVE_PROTOBUF_ERROR = None class _mysqlxpb_pure: # pylint: disable=invalid-name """This class implements the methods in pure Python used by the _mysqlxpb C++ extension.""" factory: message_factory.MessageFactory = message_factory.MessageFactory() @staticmethod def new_message(name: str) -> ProtobufMessageType: """Create new Protobuf message. Args: name (str): Message type name. Returns: object: Protobuf message. """ cls = _mysqlxpb_pure.factory.GetPrototype( _DESCRIPTOR_POOL.FindMessageTypeByName(name) ) return cls() @staticmethod def enum_value(enum_key: str) -> int: """Return enum value. Args: enum_key (str): Enum key. Returns: int: enum value. """ return _MESSAGES[enum_key] @staticmethod def serialize_message(msg: ProtobufMessageType) -> bytes: """Serialize message. Args: msg (object): Protobuf message. Returns: bytes: Serialized message bytes string. """ return msg.SerializeToString() @staticmethod def serialize_partial_message(msg: ProtobufMessageType) -> bytes: """Serialize partial message. Args: msg (object): Protobuf message. Returns: bytes: Serialized partial message bytes string. """ return msg.SerializePartialToString() @staticmethod def parse_message(msg_type_name: str, payload: bytes) -> ProtobufMessageType: """Serialize partial message. Args: msg_type_name (str): Message type name. payload (bytes): Payload. Returns: object: Message parsed from string. """ msg = _mysqlxpb_pure.new_message(msg_type_name) msg.ParseFromString(payload) return msg @staticmethod def parse_server_message(msg_type: int, payload: bytes) -> ProtobufMessageType: """Parse server message message. Args: msg_type (int): Message type. payload (bytes): Payload. Returns: object: Server message parsed from string. """ msg_type_name = SERVER_MESSAGES.get(msg_type) if not msg_type_name: raise ValueError(f"Unknown msg_type: {msg_type}") msg = _mysqlxpb_pure.new_message(msg_type_name) msg.ParseFromString(payload) return msg except (ImportError, SyntaxError, TypeError) as err: HAVE_PROTOBUF = False HAVE_PROTOBUF_ERROR = ( err if PROTOBUF_VERSION is not None else "Protobuf >=3.11.0 is required" ) if not HAVE_MYSQLXPB_CEXT: raise ImportError(f"Protobuf is not available: {HAVE_PROTOBUF_ERROR}") from err CRUD_PREPARE_MAPPING: Dict[str, Tuple[str, str]] = { "Mysqlx.ClientMessages.Type.CRUD_FIND": ( "Mysqlx.Prepare.Prepare.OneOfMessage.Type.FIND", "find", ), "Mysqlx.ClientMessages.Type.CRUD_INSERT": ( "Mysqlx.Prepare.Prepare.OneOfMessage.Type.INSERT", "insert", ), "Mysqlx.ClientMessages.Type.CRUD_UPDATE": ( "Mysqlx.Prepare.Prepare.OneOfMessage.Type.UPDATE", "update", ), "Mysqlx.ClientMessages.Type.CRUD_DELETE": ( "Mysqlx.Prepare.Prepare.OneOfMessage.Type.DELETE", "delete", ), "Mysqlx.ClientMessages.Type.SQL_STMT_EXECUTE": ( "Mysqlx.Prepare.Prepare.OneOfMessage.Type.STMT", "stmt_execute", ), } class Protobuf: """Protobuf class acts as a container of the Protobuf message class. It allows the switch between the C extension and pure Python implementation message handlers, by patching the `mysqlxpb` class attribute. """ mysqlxpb = _mysqlxpb if HAVE_MYSQLXPB_CEXT else _mysqlxpb_pure use_pure: bool = not HAVE_MYSQLXPB_CEXT @staticmethod def set_use_pure(use_pure: bool) -> None: """Sets whether to use the C extension or pure Python implementation. Args: use_pure (bool): `True` to use pure Python implementation. """ if use_pure and not HAVE_PROTOBUF: raise ImportError(f"Protobuf is not available: {HAVE_PROTOBUF_ERROR}") if not use_pure and not HAVE_MYSQLXPB_CEXT: raise ImportError("MySQL X Protobuf C extension is not available") Protobuf.mysqlxpb = _mysqlxpb_pure if use_pure else _mysqlxpb Protobuf.use_pure = use_pure class Message: """Helper class for interfacing with the MySQL X Protobuf extension. Args: msg_type_name (string): Protobuf type name. **kwargs: Arbitrary keyword arguments with values for the message. """ def __init__(self, msg_type_name: Optional[str] = None, **kwargs: Any) -> None: # _msg is a protobuf message instance when use_pure=True, # else is a dictionary instance. self.__dict__["_msg"] = ( Protobuf.mysqlxpb.new_message(msg_type_name) if msg_type_name else None ) for name, value in kwargs.items(): self.__setattr__(name, value) def __setattr__(self, name: str, value: Any) -> None: if Protobuf.use_pure: if isinstance(value, str): setattr(self._msg, name, encode_to_bytes(value)) elif isinstance(value, (NUMERIC_TYPES, BYTE_TYPES)): setattr(self._msg, name, value) elif isinstance(value, list): getattr(self._msg, name).extend(value) elif isinstance(value, Message): getattr(self._msg, name).MergeFrom(value.get_message()) else: getattr(self._msg, name).MergeFrom(value) else: if isinstance(value, str): self._msg[name] = encode_to_bytes(value) else: self._msg[name] = ( value.get_message() if isinstance(value, Message) else value ) def __getattr__(self, name: str) -> Any: try: return ( self._msg[name] if not Protobuf.use_pure else getattr(self._msg, name) ) except KeyError: raise AttributeError from None def __setitem__(self, name: str, value: Any) -> None: self.__setattr__(name, value) def __getitem__(self, name: str) -> Any: return self.__getattr__(name) def get(self, name: str, default: Any = None) -> Any: """Returns the value of an element of the message dictionary. Args: name (string): Key name. default (object): The default value if the key does not exists. Returns: object: The value of the provided key name. """ return ( self.__dict__["_msg"].get(name, default) if not Protobuf.use_pure else getattr(self.__dict__["_msg"], name, default) ) def set_message( self, msg: Union[ProtobufMessageType, ProtobufMessageCextType] ) -> None: """Sets the message. Args: msg (dict): Dictionary representing a message. """ self.__dict__["_msg"] = msg def get_message(self) -> Union[ProtobufMessageType, ProtobufMessageCextType]: """Returns the dictionary representing a message containing parsed data. Returns: dict: The dictionary representing a message containing parsed data. """ return self.__dict__["_msg"] def serialize_to_string(self) -> bytes: """Serializes a message to a string. Returns: str: A string representing a message containing parsed data. """ return Protobuf.mysqlxpb.serialize_message(self._msg) def serialize_partial_to_string(self) -> bytes: """Serializes the protocol message to a binary string. This method is similar to serialize_to_string but doesn't check if the message is initialized. Returns: str: A string representation of the partial message. """ return Protobuf.mysqlxpb.serialize_partial_message(self._msg) @property def type(self) -> str: """string: Message type name.""" return ( self._msg["_mysqlxpb_type_name"] if not Protobuf.use_pure else self._msg.DESCRIPTOR.full_name ) @staticmethod def parse( msg_type_name: str, payload: bytes ) -> Union[ProtobufMessageType, ProtobufMessageCextType]: """Creates a new message, initialized with parsed data. Args: msg_type_name (string): Message type name. payload (string): Serialized message data. Returns: dict: The dictionary representing a message containing parsed data. .. versionadded:: 8.0.21 """ return Protobuf.mysqlxpb.parse_message(msg_type_name, payload) @staticmethod def byte_size(msg: MessageType) -> int: """Returns the size of the message in bytes. Args: msg (mysqlx.protobuf.Message): MySQL X Protobuf Message. Returns: int: Size of the message in bytes. .. versionadded:: 8.0.21 """ return ( msg.ByteSize() if Protobuf.use_pure else len(encode_to_bytes(msg.serialize_to_string())) ) @staticmethod def parse_from_server( msg_type: int, payload: bytes ) -> Union[ProtobufMessageType, ProtobufMessageCextType]: """Creates a new server-side message, initialized with parsed data. Args: msg_type (int): Message type. payload (string): Serialized message data. Returns: dict: The dictionary representing a message containing parsed data. """ return Protobuf.mysqlxpb.parse_server_message(msg_type, payload) @classmethod def from_message(cls, msg_type_name: str, payload: bytes) -> MessageType: """Creates a new message, initialized with parsed data and returns a :class:`mysqlx.protobuf.Message` object. Args: msg_type_name (string): Message type name. payload (string): Serialized message data. Returns: mysqlx.protobuf.Message: The Message representing a message containing parsed data. """ msg = cls() msg.set_message(Protobuf.mysqlxpb.parse_message(msg_type_name, payload)) return msg @classmethod def from_server_message(cls, msg_type: int, payload: bytes) -> MessageType: """Creates a new server-side message, initialized with parsed data and returns a :class:`mysqlx.protobuf.Message` object. Args: msg_type (int): Message type. payload (string): Serialized message data. Returns: mysqlx.protobuf.Message: The Message representing a message containing parsed data. """ msg = cls() msg.set_message(Protobuf.mysqlxpb.parse_server_message(msg_type, payload)) return msg def mysqlxpb_enum(name: str) -> int: """Returns the value of a MySQL X Protobuf enumerator. Args: name (string): MySQL X Protobuf numerator name. Returns: int: Value of the enumerator. """ return Protobuf.mysqlxpb.enum_value(name)