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📁 ..	-	2026-03-21 15:53
📄 __init__.py # coding: utf-8 from ._version import version from .exceptions import * from .ext import ExtType, Timestamp import os import sys if os.environ.get("MSGPACK_PUREPYTHON") or sys.version_info[0] == 2: from .fallback import Packer, unpackb, Unpacker else: try: from ._cmsgpack import Packer, unpackb, Unpacker except ImportError: from .fallback import Packer, unpackb, Unpacker def pack(o, stream, kwargs): """ Pack object `o` and write it to `stream` See :class:`Packer` for options. """ packer = Packer(kwargs) stream.write(packer.pack(o)) def packb(o, kwargs): """ Pack object `o` and return packed bytes See :class:`Packer` for options. """ return Packer(kwargs).pack(o) def unpack(stream, kwargs): """ Unpack an object from `stream`. Raises `ExtraData` when `stream` contains extra bytes. See :class:`Unpacker` for options. """ data = stream.read() return unpackb(data, kwargs) # alias for compatibility to simplejson/marshal/pickle. load = unpack loads = unpackb dump = pack dumps = packb	1.09 KB	2026-01-07 23:39
📁 __pycache__	-	2026-03-21 15:53
📄 _version.py version = (1, 0, 2)	20 B	2026-01-07 23:39
📄 exceptions.py class UnpackException(Exception): """Base class for some exceptions raised while unpacking. NOTE: unpack may raise exception other than subclass of UnpackException. If you want to catch all error, catch Exception instead. """ class BufferFull(UnpackException): pass class OutOfData(UnpackException): pass class FormatError(ValueError, UnpackException): """Invalid msgpack format""" class StackError(ValueError, UnpackException): """Too nested""" # Deprecated. Use ValueError instead UnpackValueError = ValueError class ExtraData(UnpackValueError): """ExtraData is raised when there is trailing data. This exception is raised while only one-shot (not streaming) unpack. """ def __init__(self, unpacked, extra): self.unpacked = unpacked self.extra = extra def __str__(self): return "unpack(b) received extra data." # Deprecated. Use Exception instead to catch all exception during packing. PackException = Exception PackValueError = ValueError PackOverflowError = OverflowError	1.06 KB	2026-01-07 23:39
📄 ext.py # coding: utf-8 from collections import namedtuple import datetime import sys import struct PY2 = sys.version_info[0] == 2 if PY2: int_types = (int, long) _utc = None else: int_types = int try: _utc = datetime.timezone.utc except AttributeError: _utc = datetime.timezone(datetime.timedelta(0)) class ExtType(namedtuple("ExtType", "code data")): """ExtType represents ext type in msgpack.""" def __new__(cls, code, data): if not isinstance(code, int): raise TypeError("code must be int") if not isinstance(data, bytes): raise TypeError("data must be bytes") if not 0 <= code <= 127: raise ValueError("code must be 0~127") return super(ExtType, cls).__new__(cls, code, data) class Timestamp(object): """Timestamp represents the Timestamp extension type in msgpack. When built with Cython, msgpack uses C methods to pack and unpack `Timestamp`. When using pure-Python msgpack, :func:`to_bytes` and :func:`from_bytes` are used to pack and unpack `Timestamp`. This class is immutable: Do not override seconds and nanoseconds. """ __slots__ = ["seconds", "nanoseconds"] def __init__(self, seconds, nanoseconds=0): """Initialize a Timestamp object. :param int seconds: Number of seconds since the UNIX epoch (00:00:00 UTC Jan 1 1970, minus leap seconds). May be negative. :param int nanoseconds: Number of nanoseconds to add to `seconds` to get fractional time. Maximum is 999_999_999. Default is 0. Note: Negative times (before the UNIX epoch) are represented as negative seconds + positive ns. """ if not isinstance(seconds, int_types): raise TypeError("seconds must be an interger") if not isinstance(nanoseconds, int_types): raise TypeError("nanoseconds must be an integer") if not (0 <= nanoseconds < 10 9): raise ValueError( "nanoseconds must be a non-negative integer less than 999999999." ) self.seconds = seconds self.nanoseconds = nanoseconds def __repr__(self): """String representation of Timestamp.""" return "Timestamp(seconds={0}, nanoseconds={1})".format( self.seconds, self.nanoseconds ) def __eq__(self, other): """Check for equality with another Timestamp object""" if type(other) is self.__class__: return ( self.seconds == other.seconds and self.nanoseconds == other.nanoseconds ) return False def __ne__(self, other): """not-equals method (see :func:`__eq__()`)""" return not self.__eq__(other) def __hash__(self): return hash((self.seconds, self.nanoseconds)) @staticmethod def from_bytes(b): """Unpack bytes into a `Timestamp` object. Used for pure-Python msgpack unpacking. :param b: Payload from msgpack ext message with code -1 :type b: bytes :returns: Timestamp object unpacked from msgpack ext payload :rtype: Timestamp """ if len(b) == 4: seconds = struct.unpack("!L", b)[0] nanoseconds = 0 elif len(b) == 8: data64 = struct.unpack("!Q", b)[0] seconds = data64 & 0x00000003FFFFFFFF nanoseconds = data64 >> 34 elif len(b) == 12: nanoseconds, seconds = struct.unpack("!Iq", b) else: raise ValueError( "Timestamp type can only be created from 32, 64, or 96-bit byte objects" ) return Timestamp(seconds, nanoseconds) def to_bytes(self): """Pack this Timestamp object into bytes. Used for pure-Python msgpack packing. :returns data: Payload for EXT message with code -1 (timestamp type) :rtype: bytes """ if (self.seconds >> 34) == 0: # seconds is non-negative and fits in 34 bits data64 = self.nanoseconds << 34 \| self.seconds if data64 & 0xFFFFFFFF00000000 == 0: # nanoseconds is zero and seconds < 232, so timestamp 32 data = struct.pack("!L", data64) else: # timestamp 64 data = struct.pack("!Q", data64) else: # timestamp 96 data = struct.pack("!Iq", self.nanoseconds, self.seconds) return data @staticmethod def from_unix(unix_sec): """Create a Timestamp from posix timestamp in seconds. :param unix_float: Posix timestamp in seconds. :type unix_float: int or float. """ seconds = int(unix_sec // 1) nanoseconds = int((unix_sec % 1) * 10 ** 9) return Timestamp(seconds, nanoseconds) def to_unix(self): """Get the timestamp as a floating-point value. :returns: posix timestamp :rtype: float """ return self.seconds + self.nanoseconds / 1e9 @staticmethod def from_unix_nano(unix_ns): """Create a Timestamp from posix timestamp in nanoseconds. :param int unix_ns: Posix timestamp in nanoseconds. :rtype: Timestamp """ return Timestamp(divmod(unix_ns, 10 * 9)) def to_unix_nano(self): """Get the timestamp as a unixtime in nanoseconds. :returns: posix timestamp in nanoseconds :rtype: int """ return self.seconds * 10 ** 9 + self.nanoseconds def to_datetime(self): """Get the timestamp as a UTC datetime. Python 2 is not supported. :rtype: datetime. """ return datetime.datetime.fromtimestamp(0, _utc) + datetime.timedelta( seconds=self.to_unix() ) @staticmethod def from_datetime(dt): """Create a Timestamp from datetime with tzinfo. Python 2 is not supported. :rtype: Timestamp """ return Timestamp.from_unix(dt.timestamp())	5.95 KB	2026-01-07 23:39
📄 fallback.py """Fallback pure Python implementation of msgpack""" from datetime import datetime as _DateTime import sys import struct PY2 = sys.version_info[0] == 2 if PY2: int_types = (int, long) def dict_iteritems(d): return d.iteritems() else: int_types = int unicode = str xrange = range def dict_iteritems(d): return d.items() if sys.version_info < (3, 5): # Ugly hack... RecursionError = RuntimeError def _is_recursionerror(e): return ( len(e.args) == 1 and isinstance(e.args[0], str) and e.args[0].startswith("maximum recursion depth exceeded") ) else: def _is_recursionerror(e): return True if hasattr(sys, "pypy_version_info"): # StringIO is slow on PyPy, StringIO is faster. However: PyPy's own # StringBuilder is fastest. from __pypy__ import newlist_hint try: from __pypy__.builders import BytesBuilder as StringBuilder except ImportError: from __pypy__.builders import StringBuilder USING_STRINGBUILDER = True class StringIO(object): def __init__(self, s=b""): if s: self.builder = StringBuilder(len(s)) self.builder.append(s) else: self.builder = StringBuilder() def write(self, s): if isinstance(s, memoryview): s = s.tobytes() elif isinstance(s, bytearray): s = bytes(s) self.builder.append(s) def getvalue(self): return self.builder.build() else: USING_STRINGBUILDER = False from io import BytesIO as StringIO newlist_hint = lambda size: [] from .exceptions import BufferFull, OutOfData, ExtraData, FormatError, StackError from .ext import ExtType, Timestamp EX_SKIP = 0 EX_CONSTRUCT = 1 EX_READ_ARRAY_HEADER = 2 EX_READ_MAP_HEADER = 3 TYPE_IMMEDIATE = 0 TYPE_ARRAY = 1 TYPE_MAP = 2 TYPE_RAW = 3 TYPE_BIN = 4 TYPE_EXT = 5 DEFAULT_RECURSE_LIMIT = 511 def _check_type_strict(obj, t, type=type, tuple=tuple): if type(t) is tuple: return type(obj) in t else: return type(obj) is t def _get_data_from_buffer(obj): view = memoryview(obj) if view.itemsize != 1: raise ValueError("cannot unpack from multi-byte object") return view def unpackb(packed, *kwargs): """ Unpack an object from `packed`. Raises ``ExtraData`` when packed* contains extra bytes. Raises ``ValueError`` when packed is incomplete. Raises ``FormatError`` when packed is not valid msgpack. Raises ``StackError`` when packed contains too nested. Other exceptions can be raised during unpacking. See :class:`Unpacker` for options. """ unpacker = Unpacker(None, max_buffer_size=len(packed), *kwargs) unpacker.feed(packed) try: ret = unpacker._unpack() except OutOfData: raise ValueError("Unpack failed: incomplete input") except RecursionError as e: if _is_recursionerror(e): raise StackError raise if unpacker._got_extradata(): raise ExtraData(ret, unpacker._get_extradata()) return ret if sys.version_info < (2, 7, 6): def _unpack_from(f, b, o=0): """Explicit type cast for legacy struct.unpack_from""" return struct.unpack_from(f, bytes(b), o) else: _unpack_from = struct.unpack_from class Unpacker(object): """Streaming unpacker. Arguments: :param file_like: File-like object having `.read(n)` method. If specified, unpacker reads serialized data from it and :meth:`feed()` is not usable. :param int read_size: Used as `file_like.read(read_size)`. (default: `min(161024, max_buffer_size)`) :param bool use_list: If true, unpack msgpack array to Python list. Otherwise, unpack to Python tuple. (default: True) :param bool raw: If true, unpack msgpack raw to Python bytes. Otherwise, unpack to Python str by decoding with UTF-8 encoding (default). :param int timestamp: Control how timestamp type is unpacked: 0 - Timestamp 1 - float (Seconds from the EPOCH) 2 - int (Nanoseconds from the EPOCH) 3 - datetime.datetime (UTC). Python 2 is not supported. :param bool strict_map_key: If true (default), only str or bytes are accepted for map (dict) keys. :param callable object_hook: When specified, it should be callable. Unpacker calls it with a dict argument after unpacking msgpack map. (See also simplejson) :param callable object_pairs_hook: When specified, it should be callable. Unpacker calls it with a list of key-value pairs after unpacking msgpack map. (See also simplejson) :param str unicode_errors: The error handler for decoding unicode. (default: 'strict') This option should be used only when you have msgpack data which contains invalid UTF-8 string. :param int max_buffer_size: Limits size of data waiting unpacked. 0 means 2*32-1. The default value is 10010241024 (100MiB). Raises `BufferFull` exception when it is insufficient. You should set this parameter when unpacking data from untrusted source. :param int max_str_len: Deprecated, use max_buffer_size* instead. Limits max length of str. (default: max_buffer_size) :param int max_bin_len: Deprecated, use max_buffer_size instead. Limits max length of bin. (default: max_buffer_size) :param int max_array_len: Limits max length of array. (default: max_buffer_size) :param int max_map_len: Limits max length of map. (default: max_buffer_size//2) :param int max_ext_len: Deprecated, use max_buffer_size instead. Limits max size of ext type. (default: max_buffer_size) Example of streaming deserialize from file-like object:: unpacker = Unpacker(file_like) for o in unpacker: process(o) Example of streaming deserialize from socket:: unpacker = Unpacker(max_buffer_size) while True: buf = sock.recv(1024*2) if not buf: break unpacker.feed(buf) for o in unpacker: process(o) Raises ``ExtraData`` when packed* contains extra bytes. Raises ``OutOfData`` when packed is incomplete. Raises ``FormatError`` when packed is not valid msgpack. Raises ``StackError`` when packed contains too nested. Other exceptions can be raised during unpacking. """ def __init__( self, file_like=None, read_size=0, use_list=True, raw=False, timestamp=0, strict_map_key=True, object_hook=None, object_pairs_hook=None, list_hook=None, unicode_errors=None, max_buffer_size=100 * 1024 * 1024, ext_hook=ExtType, max_str_len=-1, max_bin_len=-1, max_array_len=-1, max_map_len=-1, max_ext_len=-1, ): if unicode_errors is None: unicode_errors = "strict" if file_like is None: self._feeding = True else: if not callable(file_like.read): raise TypeError("`file_like.read` must be callable") self.file_like = file_like self._feeding = False #: array of bytes fed. self._buffer = bytearray() #: Which position we currently reads self._buff_i = 0 # When Unpacker is used as an iterable, between the calls to next(), # the buffer is not "consumed" completely, for efficiency sake. # Instead, it is done sloppily. To make sure we raise BufferFull at # the correct moments, we have to keep track of how sloppy we were. # Furthermore, when the buffer is incomplete (that is: in the case # we raise an OutOfData) we need to rollback the buffer to the correct # state, which _buf_checkpoint records. self._buf_checkpoint = 0 if not max_buffer_size: max_buffer_size = 2 ** 31 - 1 if max_str_len == -1: max_str_len = max_buffer_size if max_bin_len == -1: max_bin_len = max_buffer_size if max_array_len == -1: max_array_len = max_buffer_size if max_map_len == -1: max_map_len = max_buffer_size // 2 if max_ext_len == -1: max_ext_len = max_buffer_size self._max_buffer_size = max_buffer_size if read_size > self._max_buffer_size: raise ValueError("read_size must be smaller than max_buffer_size") self._read_size = read_size or min(self._max_buffer_size, 16 * 1024) self._raw = bool(raw) self._strict_map_key = bool(strict_map_key) self._unicode_errors = unicode_errors self._use_list = use_list if not (0 <= timestamp <= 3): raise ValueError("timestamp must be 0..3") self._timestamp = timestamp self._list_hook = list_hook self._object_hook = object_hook self._object_pairs_hook = object_pairs_hook self._ext_hook = ext_hook self._max_str_len = max_str_len self._max_bin_len = max_bin_len self._max_array_len = max_array_len self._max_map_len = max_map_len self._max_ext_len = max_ext_len self._stream_offset = 0 if list_hook is not None and not callable(list_hook): raise TypeError("`list_hook` is not callable") if object_hook is not None and not callable(object_hook): raise TypeError("`object_hook` is not callable") if object_pairs_hook is not None and not callable(object_pairs_hook): raise TypeError("`object_pairs_hook` is not callable") if object_hook is not None and object_pairs_hook is not None: raise TypeError( "object_pairs_hook and object_hook are mutually " "exclusive" ) if not callable(ext_hook): raise TypeError("`ext_hook` is not callable") def feed(self, next_bytes): assert self._feeding view = _get_data_from_buffer(next_bytes) if len(self._buffer) - self._buff_i + len(view) > self._max_buffer_size: raise BufferFull # Strip buffer before checkpoint before reading file. if self._buf_checkpoint > 0: del self._buffer[: self._buf_checkpoint] self._buff_i -= self._buf_checkpoint self._buf_checkpoint = 0 # Use extend here: INPLACE_ADD += doesn't reliably typecast memoryview in jython self._buffer.extend(view) def _consume(self): """ Gets rid of the used parts of the buffer. """ self._stream_offset += self._buff_i - self._buf_checkpoint self._buf_checkpoint = self._buff_i def _got_extradata(self): return self._buff_i < len(self._buffer) def _get_extradata(self): return self._buffer[self._buff_i :] def read_bytes(self, n): ret = self._read(n, raise_outofdata=False) self._consume() return ret def _read(self, n, raise_outofdata=True): # (int) -> bytearray self._reserve(n, raise_outofdata=raise_outofdata) i = self._buff_i ret = self._buffer[i : i + n] self._buff_i = i + len(ret) return ret def _reserve(self, n, raise_outofdata=True): remain_bytes = len(self._buffer) - self._buff_i - n # Fast path: buffer has n bytes already if remain_bytes >= 0: return if self._feeding: self._buff_i = self._buf_checkpoint raise OutOfData # Strip buffer before checkpoint before reading file. if self._buf_checkpoint > 0: del self._buffer[: self._buf_checkpoint] self._buff_i -= self._buf_checkpoint self._buf_checkpoint = 0 # Read from file remain_bytes = -remain_bytes while remain_bytes > 0: to_read_bytes = max(self._read_size, remain_bytes) read_data = self.file_like.read(to_read_bytes) if not read_data: break assert isinstance(read_data, bytes) self._buffer += read_data remain_bytes -= len(read_data) if len(self._buffer) < n + self._buff_i and raise_outofdata: self._buff_i = 0 # rollback raise OutOfData def _read_header(self, execute=EX_CONSTRUCT): typ = TYPE_IMMEDIATE n = 0 obj = None self._reserve(1) b = self._buffer[self._buff_i] self._buff_i += 1 if b & 0b10000000 == 0: obj = b elif b & 0b11100000 == 0b11100000: obj = -1 - (b ^ 0xFF) elif b & 0b11100000 == 0b10100000: n = b & 0b00011111 typ = TYPE_RAW if n > self._max_str_len: raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len) obj = self._read(n) elif b & 0b11110000 == 0b10010000: n = b & 0b00001111 typ = TYPE_ARRAY if n > self._max_array_len: raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len) elif b & 0b11110000 == 0b10000000: n = b & 0b00001111 typ = TYPE_MAP if n > self._max_map_len: raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len) elif b == 0xC0: obj = None elif b == 0xC2: obj = False elif b == 0xC3: obj = True elif b == 0xC4: typ = TYPE_BIN self._reserve(1) n = self._buffer[self._buff_i] self._buff_i += 1 if n > self._max_bin_len: raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len)) obj = self._read(n) elif b == 0xC5: typ = TYPE_BIN self._reserve(2) n = _unpack_from(">H", self._buffer, self._buff_i)[0] self._buff_i += 2 if n > self._max_bin_len: raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len)) obj = self._read(n) elif b == 0xC6: typ = TYPE_BIN self._reserve(4) n = _unpack_from(">I", self._buffer, self._buff_i)[0] self._buff_i += 4 if n > self._max_bin_len: raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len)) obj = self._read(n) elif b == 0xC7: # ext 8 typ = TYPE_EXT self._reserve(2) L, n = _unpack_from("Bb", self._buffer, self._buff_i) self._buff_i += 2 if L > self._max_ext_len: raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len)) obj = self._read(L) elif b == 0xC8: # ext 16 typ = TYPE_EXT self._reserve(3) L, n = _unpack_from(">Hb", self._buffer, self._buff_i) self._buff_i += 3 if L > self._max_ext_len: raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len)) obj = self._read(L) elif b == 0xC9: # ext 32 typ = TYPE_EXT self._reserve(5) L, n = _unpack_from(">Ib", self._buffer, self._buff_i) self._buff_i += 5 if L > self._max_ext_len: raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len)) obj = self._read(L) elif b == 0xCA: self._reserve(4) obj = _unpack_from(">f", self._buffer, self._buff_i)[0] self._buff_i += 4 elif b == 0xCB: self._reserve(8) obj = _unpack_from(">d", self._buffer, self._buff_i)[0] self._buff_i += 8 elif b == 0xCC: self._reserve(1) obj = self._buffer[self._buff_i] self._buff_i += 1 elif b == 0xCD: self._reserve(2) obj = _unpack_from(">H", self._buffer, self._buff_i)[0] self._buff_i += 2 elif b == 0xCE: self._reserve(4) obj = _unpack_from(">I", self._buffer, self._buff_i)[0] self._buff_i += 4 elif b == 0xCF: self._reserve(8) obj = _unpack_from(">Q", self._buffer, self._buff_i)[0] self._buff_i += 8 elif b == 0xD0: self._reserve(1) obj = _unpack_from("b", self._buffer, self._buff_i)[0] self._buff_i += 1 elif b == 0xD1: self._reserve(2) obj = _unpack_from(">h", self._buffer, self._buff_i)[0] self._buff_i += 2 elif b == 0xD2: self._reserve(4) obj = _unpack_from(">i", self._buffer, self._buff_i)[0] self._buff_i += 4 elif b == 0xD3: self._reserve(8) obj = _unpack_from(">q", self._buffer, self._buff_i)[0] self._buff_i += 8 elif b == 0xD4: # fixext 1 typ = TYPE_EXT if self._max_ext_len < 1: raise ValueError("%s exceeds max_ext_len(%s)" % (1, self._max_ext_len)) self._reserve(2) n, obj = _unpack_from("b1s", self._buffer, self._buff_i) self._buff_i += 2 elif b == 0xD5: # fixext 2 typ = TYPE_EXT if self._max_ext_len < 2: raise ValueError("%s exceeds max_ext_len(%s)" % (2, self._max_ext_len)) self._reserve(3) n, obj = _unpack_from("b2s", self._buffer, self._buff_i) self._buff_i += 3 elif b == 0xD6: # fixext 4 typ = TYPE_EXT if self._max_ext_len < 4: raise ValueError("%s exceeds max_ext_len(%s)" % (4, self._max_ext_len)) self._reserve(5) n, obj = _unpack_from("b4s", self._buffer, self._buff_i) self._buff_i += 5 elif b == 0xD7: # fixext 8 typ = TYPE_EXT if self._max_ext_len < 8: raise ValueError("%s exceeds max_ext_len(%s)" % (8, self._max_ext_len)) self._reserve(9) n, obj = _unpack_from("b8s", self._buffer, self._buff_i) self._buff_i += 9 elif b == 0xD8: # fixext 16 typ = TYPE_EXT if self._max_ext_len < 16: raise ValueError("%s exceeds max_ext_len(%s)" % (16, self._max_ext_len)) self._reserve(17) n, obj = _unpack_from("b16s", self._buffer, self._buff_i) self._buff_i += 17 elif b == 0xD9: typ = TYPE_RAW self._reserve(1) n = self._buffer[self._buff_i] self._buff_i += 1 if n > self._max_str_len: raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len) obj = self._read(n) elif b == 0xDA: typ = TYPE_RAW self._reserve(2) (n,) = _unpack_from(">H", self._buffer, self._buff_i) self._buff_i += 2 if n > self._max_str_len: raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len) obj = self._read(n) elif b == 0xDB: typ = TYPE_RAW self._reserve(4) (n,) = _unpack_from(">I", self._buffer, self._buff_i) self._buff_i += 4 if n > self._max_str_len: raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len) obj = self._read(n) elif b == 0xDC: typ = TYPE_ARRAY self._reserve(2) (n,) = _unpack_from(">H", self._buffer, self._buff_i) self._buff_i += 2 if n > self._max_array_len: raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len) elif b == 0xDD: typ = TYPE_ARRAY self._reserve(4) (n,) = _unpack_from(">I", self._buffer, self._buff_i) self._buff_i += 4 if n > self._max_array_len: raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len) elif b == 0xDE: self._reserve(2) (n,) = _unpack_from(">H", self._buffer, self._buff_i) self._buff_i += 2 if n > self._max_map_len: raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len) typ = TYPE_MAP elif b == 0xDF: self._reserve(4) (n,) = _unpack_from(">I", self._buffer, self._buff_i) self._buff_i += 4 if n > self._max_map_len: raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len) typ = TYPE_MAP else: raise FormatError("Unknown header: 0x%x" % b) return typ, n, obj def _unpack(self, execute=EX_CONSTRUCT): typ, n, obj = self._read_header(execute) if execute == EX_READ_ARRAY_HEADER: if typ != TYPE_ARRAY: raise ValueError("Expected array") return n if execute == EX_READ_MAP_HEADER: if typ != TYPE_MAP: raise ValueError("Expected map") return n # TODO should we eliminate the recursion? if typ == TYPE_ARRAY: if execute == EX_SKIP: for i in xrange(n): # TODO check whether we need to call `list_hook` self._unpack(EX_SKIP) return ret = newlist_hint(n) for i in xrange(n): ret.append(self._unpack(EX_CONSTRUCT)) if self._list_hook is not None: ret = self._list_hook(ret) # TODO is the interaction between `list_hook` and `use_list` ok? return ret if self._use_list else tuple(ret) if typ == TYPE_MAP: if execute == EX_SKIP: for i in xrange(n): # TODO check whether we need to call hooks self._unpack(EX_SKIP) self._unpack(EX_SKIP) return if self._object_pairs_hook is not None: ret = self._object_pairs_hook( (self._unpack(EX_CONSTRUCT), self._unpack(EX_CONSTRUCT)) for _ in xrange(n) ) else: ret = {} for _ in xrange(n): key = self._unpack(EX_CONSTRUCT) if self._strict_map_key and type(key) not in (unicode, bytes): raise ValueError( "%s is not allowed for map key" % str(type(key)) ) if not PY2 and type(key) is str: key = sys.intern(key) ret[key] = self._unpack(EX_CONSTRUCT) if self._object_hook is not None: ret = self._object_hook(ret) return ret if execute == EX_SKIP: return if typ == TYPE_RAW: if self._raw: obj = bytes(obj) else: obj = obj.decode("utf_8", self._unicode_errors) return obj if typ == TYPE_BIN: return bytes(obj) if typ == TYPE_EXT: if n == -1: # timestamp ts = Timestamp.from_bytes(bytes(obj)) if self._timestamp == 1: return ts.to_unix() elif self._timestamp == 2: return ts.to_unix_nano() elif self._timestamp == 3: return ts.to_datetime() else: return ts else: return self._ext_hook(n, bytes(obj)) assert typ == TYPE_IMMEDIATE return obj def __iter__(self): return self def __next__(self): try: ret = self._unpack(EX_CONSTRUCT) self._consume() return ret except OutOfData: self._consume() raise StopIteration except RecursionError: raise StackError next = __next__ def skip(self): self._unpack(EX_SKIP) self._consume() def unpack(self): try: ret = self._unpack(EX_CONSTRUCT) except RecursionError: raise StackError self._consume() return ret def read_array_header(self): ret = self._unpack(EX_READ_ARRAY_HEADER) self._consume() return ret def read_map_header(self): ret = self._unpack(EX_READ_MAP_HEADER) self._consume() return ret def tell(self): return self._stream_offset class Packer(object): """ MessagePack Packer Usage:: packer = Packer() astream.write(packer.pack(a)) astream.write(packer.pack(b)) Packer's constructor has some keyword arguments: :param callable default: Convert user type to builtin type that Packer supports. See also simplejson's document. :param bool use_single_float: Use single precision float type for float. (default: False) :param bool autoreset: Reset buffer after each pack and return its content as `bytes`. (default: True). If set this to false, use `bytes()` to get content and `.reset()` to clear buffer. :param bool use_bin_type: Use bin type introduced in msgpack spec 2.0 for bytes. It also enables str8 type for unicode. (default: True) :param bool strict_types: If set to true, types will be checked to be exact. Derived classes from serializable types will not be serialized and will be treated as unsupported type and forwarded to default. Additionally tuples will not be serialized as lists. This is useful when trying to implement accurate serialization for python types. :param bool datetime: If set to true, datetime with tzinfo is packed into Timestamp type. Note that the tzinfo is stripped in the timestamp. You can get UTC datetime with `timestamp=3` option of the Unpacker. (Python 2 is not supported). :param str unicode_errors: The error handler for encoding unicode. (default: 'strict') DO NOT USE THIS!! This option is kept for very specific usage. Example of streaming deserialize from file-like object:: unpacker = Unpacker(file_like) for o in unpacker: process(o) Example of streaming deserialize from socket:: unpacker = Unpacker() while True: buf = sock.recv(1024*2) if not buf: break unpacker.feed(buf) for o in unpacker: process(o) Raises ``ExtraData`` when packed* contains extra bytes. Raises ``OutOfData`` when packed is incomplete. Raises ``FormatError`` when packed is not valid msgpack. Raises ``StackError`` when packed contains too nested. Other exceptions can be raised during unpacking. """ def __init__( self, default=None, use_single_float=False, autoreset=True, use_bin_type=True, strict_types=False, datetime=False, unicode_errors=None, ): self._strict_types = strict_types self._use_float = use_single_float self._autoreset = autoreset self._use_bin_type = use_bin_type self._buffer = StringIO() if PY2 and datetime: raise ValueError("datetime is not supported in Python 2") self._datetime = bool(datetime) self._unicode_errors = unicode_errors or "strict" if default is not None: if not callable(default): raise TypeError("default must be callable") self._default = default def _pack( self, obj, nest_limit=DEFAULT_RECURSE_LIMIT, check=isinstance, check_type_strict=_check_type_strict, ): default_used = False if self._strict_types: check = check_type_strict list_types = list else: list_types = (list, tuple) while True: if nest_limit < 0: raise ValueError("recursion limit exceeded") if obj is None: return self._buffer.write(b"\xc0") if check(obj, bool): if obj: return self._buffer.write(b"\xc3") return self._buffer.write(b"\xc2") if check(obj, int_types): if 0 <= obj < 0x80: return self._buffer.write(struct.pack("B", obj)) if -0x20 <= obj < 0: return self._buffer.write(struct.pack("b", obj)) if 0x80 <= obj <= 0xFF: return self._buffer.write(struct.pack("BB", 0xCC, obj)) if -0x80 <= obj < 0: return self._buffer.write(struct.pack(">Bb", 0xD0, obj)) if 0xFF < obj <= 0xFFFF: return self._buffer.write(struct.pack(">BH", 0xCD, obj)) if -0x8000 <= obj < -0x80: return self._buffer.write(struct.pack(">Bh", 0xD1, obj)) if 0xFFFF < obj <= 0xFFFFFFFF: return self._buffer.write(struct.pack(">BI", 0xCE, obj)) if -0x80000000 <= obj < -0x8000: return self._buffer.write(struct.pack(">Bi", 0xD2, obj)) if 0xFFFFFFFF < obj <= 0xFFFFFFFFFFFFFFFF: return self._buffer.write(struct.pack(">BQ", 0xCF, obj)) if -0x8000000000000000 <= obj < -0x80000000: return self._buffer.write(struct.pack(">Bq", 0xD3, obj)) if not default_used and self._default is not None: obj = self._default(obj) default_used = True continue raise OverflowError("Integer value out of range") if check(obj, (bytes, bytearray)): n = len(obj) if n >= 2 32: raise ValueError("%s is too large" % type(obj).__name__) self._pack_bin_header(n) return self._buffer.write(obj) if check(obj, unicode): obj = obj.encode("utf-8", self._unicode_errors) n = len(obj) if n >= 2 32: raise ValueError("String is too large") self._pack_raw_header(n) return self._buffer.write(obj) if check(obj, memoryview): n = len(obj) * obj.itemsize if n >= 2 32: raise ValueError("Memoryview is too large") self._pack_bin_header(n) return self._buffer.write(obj) if check(obj, float): if self._use_float: return self._buffer.write(struct.pack(">Bf", 0xCA, obj)) return self._buffer.write(struct.pack(">Bd", 0xCB, obj)) if check(obj, (ExtType, Timestamp)): if check(obj, Timestamp): code = -1 data = obj.to_bytes() else: code = obj.code data = obj.data assert isinstance(code, int) assert isinstance(data, bytes) L = len(data) if L == 1: self._buffer.write(b"\xd4") elif L == 2: self._buffer.write(b"\xd5") elif L == 4: self._buffer.write(b"\xd6") elif L == 8: self._buffer.write(b"\xd7") elif L == 16: self._buffer.write(b"\xd8") elif L <= 0xFF: self._buffer.write(struct.pack(">BB", 0xC7, L)) elif L <= 0xFFFF: self._buffer.write(struct.pack(">BH", 0xC8, L)) else: self._buffer.write(struct.pack(">BI", 0xC9, L)) self._buffer.write(struct.pack("b", code)) self._buffer.write(data) return if check(obj, list_types): n = len(obj) self._pack_array_header(n) for i in xrange(n): self._pack(obj[i], nest_limit - 1) return if check(obj, dict): return self._pack_map_pairs( len(obj), dict_iteritems(obj), nest_limit - 1 ) if self._datetime and check(obj, _DateTime) and obj.tzinfo is not None: obj = Timestamp.from_datetime(obj) default_used = 1 continue if not default_used and self._default is not None: obj = self._default(obj) default_used = 1 continue raise TypeError("Cannot serialize %r" % (obj,)) def pack(self, obj): try: self._pack(obj) except: self._buffer = StringIO() # force reset raise if self._autoreset: ret = self._buffer.getvalue() self._buffer = StringIO() return ret def pack_map_pairs(self, pairs): self._pack_map_pairs(len(pairs), pairs) if self._autoreset: ret = self._buffer.getvalue() self._buffer = StringIO() return ret def pack_array_header(self, n): if n >= 2 32: raise ValueError self._pack_array_header(n) if self._autoreset: ret = self._buffer.getvalue() self._buffer = StringIO() return ret def pack_map_header(self, n): if n >= 2 ** 32: raise ValueError self._pack_map_header(n) if self._autoreset: ret = self._buffer.getvalue() self._buffer = StringIO() return ret def pack_ext_type(self, typecode, data): if not isinstance(typecode, int): raise TypeError("typecode must have int type.") if not 0 <= typecode <= 127: raise ValueError("typecode should be 0-127") if not isinstance(data, bytes): raise TypeError("data must have bytes type") L = len(data) if L > 0xFFFFFFFF: raise ValueError("Too large data") if L == 1: self._buffer.write(b"\xd4") elif L == 2: self._buffer.write(b"\xd5") elif L == 4: self._buffer.write(b"\xd6") elif L == 8: self._buffer.write(b"\xd7") elif L == 16: self._buffer.write(b"\xd8") elif L <= 0xFF: self._buffer.write(b"\xc7" + struct.pack("B", L)) elif L <= 0xFFFF: self._buffer.write(b"\xc8" + struct.pack(">H", L)) else: self._buffer.write(b"\xc9" + struct.pack(">I", L)) self._buffer.write(struct.pack("B", typecode)) self._buffer.write(data) def _pack_array_header(self, n): if n <= 0x0F: return self._buffer.write(struct.pack("B", 0x90 + n)) if n <= 0xFFFF: return self._buffer.write(struct.pack(">BH", 0xDC, n)) if n <= 0xFFFFFFFF: return self._buffer.write(struct.pack(">BI", 0xDD, n)) raise ValueError("Array is too large") def _pack_map_header(self, n): if n <= 0x0F: return self._buffer.write(struct.pack("B", 0x80 + n)) if n <= 0xFFFF: return self._buffer.write(struct.pack(">BH", 0xDE, n)) if n <= 0xFFFFFFFF: return self._buffer.write(struct.pack(">BI", 0xDF, n)) raise ValueError("Dict is too large") def _pack_map_pairs(self, n, pairs, nest_limit=DEFAULT_RECURSE_LIMIT): self._pack_map_header(n) for (k, v) in pairs: self._pack(k, nest_limit - 1) self._pack(v, nest_limit - 1) def _pack_raw_header(self, n): if n <= 0x1F: self._buffer.write(struct.pack("B", 0xA0 + n)) elif self._use_bin_type and n <= 0xFF: self._buffer.write(struct.pack(">BB", 0xD9, n)) elif n <= 0xFFFF: self._buffer.write(struct.pack(">BH", 0xDA, n)) elif n <= 0xFFFFFFFF: self._buffer.write(struct.pack(">BI", 0xDB, n)) else: raise ValueError("Raw is too large") def _pack_bin_header(self, n): if not self._use_bin_type: return self._pack_raw_header(n) elif n <= 0xFF: return self._buffer.write(struct.pack(">BB", 0xC4, n)) elif n <= 0xFFFF: return self._buffer.write(struct.pack(">BH", 0xC5, n)) elif n <= 0xFFFFFFFF: return self._buffer.write(struct.pack(">BI", 0xC6, n)) else: raise ValueError("Bin is too large") def bytes(self): """Return internal buffer contents as bytes object""" return self._buffer.getvalue() def reset(self): """Reset internal buffer. This method is useful only when autoreset=False. """ self._buffer = StringIO() def getbuffer(self): """Return view of internal buffer.""" if USING_STRINGBUILDER or PY2: return memoryview(self.bytes()) else: return self._buffer.getbuffer()	37.13 KB	2026-01-07 23:39

Terminal