882 lines
28 KiB
Python
Executable file
882 lines
28 KiB
Python
Executable file
# u-msgpack-python v2.1 - vsergeev at gmail
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# https://github.com/vsergeev/u-msgpack-python
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#
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# u-msgpack-python is a lightweight MessagePack serializer and deserializer
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# module, compatible with both Python 2 and 3, as well CPython and PyPy
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# implementations of Python. u-msgpack-python is fully compliant with the
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# latest MessagePack specification.com/msgpack/msgpack/blob/master/spec.md). In
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# particular, it supports the new binary, UTF-8 string, and application ext
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# types.
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#
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# MIT License
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#
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# Copyright (c) 2013-2014 Ivan A. Sergeev
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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"""
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u-msgpack-python v2.1 - vsergeev at gmail
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https://github.com/vsergeev/u-msgpack-python
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u-msgpack-python is a lightweight MessagePack serializer and deserializer
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module, compatible with both Python 2 and 3, as well CPython and PyPy
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implementations of Python. u-msgpack-python is fully compliant with the
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latest MessagePack specification.com/msgpack/msgpack/blob/master/spec.md). In
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particular, it supports the new binary, UTF-8 string, and application ext
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types.
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License: MIT
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"""
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__version__ = "2.1"
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"Module version string"
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version = (2,1)
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"Module version tuple"
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import struct
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import collections
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import sys
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import io
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################################################################################
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### Ext Class
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################################################################################
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# Extension type for application-defined types and data
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class Ext:
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"""
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The Ext class facilitates creating a serializable extension object to store
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an application-defined type and data byte array.
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"""
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def __init__(self, type, data):
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"""
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Construct a new Ext object.
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Args:
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type: application-defined type integer from 0 to 127
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data: application-defined data byte array
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Raises:
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TypeError:
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Specified ext type is outside of 0 to 127 range.
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Example:
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>>> foo = umsgpack.Ext(0x05, b"\x01\x02\x03")
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>>> umsgpack.packb({u"special stuff": foo, u"awesome": True})
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'\x82\xa7awesome\xc3\xadspecial stuff\xc7\x03\x05\x01\x02\x03'
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>>> bar = umsgpack.unpackb(_)
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>>> print(bar["special stuff"])
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Ext Object (Type: 0x05, Data: 01 02 03)
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>>>
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"""
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# Application ext type should be 0 <= type <= 127
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if not isinstance(type, int) or not (type >= 0 and type <= 127):
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raise TypeError("ext type out of range")
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# Check data is type bytes
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elif sys.version_info[0] == 3 and not isinstance(data, bytes):
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raise TypeError("ext data is not type \'bytes\'")
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elif sys.version_info[0] == 2 and not isinstance(data, str):
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raise TypeError("ext data is not type \'str\'")
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self.type = type
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self.data = data
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def __eq__(self, other):
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"""
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Compare this Ext object with another for equality.
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"""
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return (isinstance(other, self.__class__) and
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self.type == other.type and
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self.data == other.data)
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def __ne__(self, other):
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"""
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Compare this Ext object with another for inequality.
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"""
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return not self.__eq__(other)
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def __str__(self):
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"""
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String representation of this Ext object.
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"""
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s = "Ext Object (Type: 0x%02x, Data: " % self.type
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for i in range(min(len(self.data), 8)):
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if i > 0:
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s += " "
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if isinstance(self.data[i], int):
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s += "%02x" % (self.data[i])
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else:
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s += "%02x" % ord(self.data[i])
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if len(self.data) > 8:
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s += " ..."
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s += ")"
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return s
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################################################################################
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### Exceptions
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################################################################################
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# Base Exception classes
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class PackException(Exception):
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"Base class for exceptions encountered during packing."
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pass
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class UnpackException(Exception):
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"Base class for exceptions encountered during unpacking."
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pass
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# Packing error
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class UnsupportedTypeException(PackException):
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"Object type not supported for packing."
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pass
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# Unpacking error
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class InsufficientDataException(UnpackException):
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"Insufficient data to unpack the encoded object."
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pass
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class InvalidStringException(UnpackException):
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"Invalid UTF-8 string encountered during unpacking."
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pass
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class ReservedCodeException(UnpackException):
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"Reserved code encountered during unpacking."
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pass
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class UnhashableKeyException(UnpackException):
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"""
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Unhashable key encountered during map unpacking.
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The serialized map cannot be deserialized into a Python dictionary.
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"""
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pass
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class DuplicateKeyException(UnpackException):
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"Duplicate key encountered during map unpacking."
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pass
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# Backwards compatibility
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KeyNotPrimitiveException = UnhashableKeyException
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KeyDuplicateException = DuplicateKeyException
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################################################################################
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### Exported Functions and Globals
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################################################################################
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# Exported functions and variables, set up in __init()
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pack = None
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packb = None
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unpack = None
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unpackb = None
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dump = None
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dumps = None
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load = None
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loads = None
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compatibility = False
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"""
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Compatibility mode boolean.
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When compatibility mode is enabled, u-msgpack-python will serialize both
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unicode strings and bytes into the old "raw" msgpack type, and deserialize the
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"raw" msgpack type into bytes. This provides backwards compatibility with the
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old MessagePack specification.
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Example:
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>>> umsgpack.compatibility = True
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>>>
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>>> umsgpack.packb([u"some string", b"some bytes"])
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b'\x92\xabsome string\xaasome bytes'
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>>> umsgpack.unpackb(_)
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[b'some string', b'some bytes']
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>>>
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"""
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################################################################################
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### Packing
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################################################################################
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# You may notice struct.pack("B", obj) instead of the simpler chr(obj) in the
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# code below. This is to allow for seamless Python 2 and 3 compatibility, as
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# chr(obj) has a str return type instead of bytes in Python 3, and
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# struct.pack(...) has the right return type in both versions.
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def _pack_integer(obj, fp):
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if obj < 0:
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if obj >= -32:
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fp.write(struct.pack("b", obj))
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elif obj >= -2**(8-1):
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fp.write(b"\xd0" + struct.pack("b", obj))
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elif obj >= -2**(16-1):
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fp.write(b"\xd1" + struct.pack(">h", obj))
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elif obj >= -2**(32-1):
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fp.write(b"\xd2" + struct.pack(">i", obj))
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elif obj >= -2**(64-1):
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fp.write(b"\xd3" + struct.pack(">q", obj))
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else:
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raise UnsupportedTypeException("huge signed int")
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else:
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if obj <= 127:
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fp.write(struct.pack("B", obj))
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elif obj <= 2**8-1:
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fp.write(b"\xcc" + struct.pack("B", obj))
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elif obj <= 2**16-1:
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fp.write(b"\xcd" + struct.pack(">H", obj))
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elif obj <= 2**32-1:
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fp.write(b"\xce" + struct.pack(">I", obj))
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elif obj <= 2**64-1:
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fp.write(b"\xcf" + struct.pack(">Q", obj))
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else:
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raise UnsupportedTypeException("huge unsigned int")
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def _pack_nil(obj, fp):
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fp.write(b"\xc0")
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def _pack_boolean(obj, fp):
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fp.write(b"\xc3" if obj else b"\xc2")
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def _pack_float(obj, fp):
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if _float_size == 64:
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fp.write(b"\xcb" + struct.pack(">d", obj))
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else:
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fp.write(b"\xca" + struct.pack(">f", obj))
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def _pack_string(obj, fp):
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obj = obj.encode('utf-8')
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if len(obj) <= 31:
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fp.write(struct.pack("B", 0xa0 | len(obj)) + obj)
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elif len(obj) <= 2**8-1:
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fp.write(b"\xd9" + struct.pack("B", len(obj)) + obj)
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elif len(obj) <= 2**16-1:
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fp.write(b"\xda" + struct.pack(">H", len(obj)) + obj)
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elif len(obj) <= 2**32-1:
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fp.write(b"\xdb" + struct.pack(">I", len(obj)) + obj)
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else:
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raise UnsupportedTypeException("huge string")
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def _pack_binary(obj, fp):
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if len(obj) <= 2**8-1:
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fp.write(b"\xc4" + struct.pack("B", len(obj)) + obj)
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elif len(obj) <= 2**16-1:
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fp.write(b"\xc5" + struct.pack(">H", len(obj)) + obj)
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elif len(obj) <= 2**32-1:
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fp.write(b"\xc6" + struct.pack(">I", len(obj)) + obj)
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else:
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raise UnsupportedTypeException("huge binary string")
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def _pack_oldspec_raw(obj, fp):
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if len(obj) <= 31:
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fp.write(struct.pack("B", 0xa0 | len(obj)) + obj)
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elif len(obj) <= 2**16-1:
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fp.write(b"\xda" + struct.pack(">H", len(obj)) + obj)
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elif len(obj) <= 2**32-1:
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fp.write(b"\xdb" + struct.pack(">I", len(obj)) + obj)
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else:
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raise UnsupportedTypeException("huge raw string")
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def _pack_ext(obj, fp):
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if len(obj.data) == 1:
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fp.write(b"\xd4" + struct.pack("B", obj.type & 0xff) + obj.data)
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elif len(obj.data) == 2:
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fp.write(b"\xd5" + struct.pack("B", obj.type & 0xff) + obj.data)
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elif len(obj.data) == 4:
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fp.write(b"\xd6" + struct.pack("B", obj.type & 0xff) + obj.data)
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elif len(obj.data) == 8:
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fp.write(b"\xd7" + struct.pack("B", obj.type & 0xff) + obj.data)
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elif len(obj.data) == 16:
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fp.write(b"\xd8" + struct.pack("B", obj.type & 0xff) + obj.data)
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elif len(obj.data) <= 2**8-1:
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fp.write(b"\xc7" + struct.pack("BB", len(obj.data), obj.type & 0xff) + obj.data)
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elif len(obj.data) <= 2**16-1:
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fp.write(b"\xc8" + struct.pack(">HB", len(obj.data), obj.type & 0xff) + obj.data)
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elif len(obj.data) <= 2**32-1:
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fp.write(b"\xc9" + struct.pack(">IB", len(obj.data), obj.type & 0xff) + obj.data)
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else:
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raise UnsupportedTypeException("huge ext data")
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def _pack_array(obj, fp):
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if len(obj) <= 15:
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fp.write(struct.pack("B", 0x90 | len(obj)))
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elif len(obj) <= 2**16-1:
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fp.write(b"\xdc" + struct.pack(">H", len(obj)))
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elif len(obj) <= 2**32-1:
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fp.write(b"\xdd" + struct.pack(">I", len(obj)))
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else:
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raise UnsupportedTypeException("huge array")
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for e in obj:
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pack(e, fp)
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def _pack_map(obj, fp):
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if len(obj) <= 15:
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fp.write(struct.pack("B", 0x80 | len(obj)))
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elif len(obj) <= 2**16-1:
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fp.write(b"\xde" + struct.pack(">H", len(obj)))
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elif len(obj) <= 2**32-1:
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fp.write(b"\xdf" + struct.pack(">I", len(obj)))
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else:
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raise UnsupportedTypeException("huge array")
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for k,v in obj.items():
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pack(k, fp)
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pack(v, fp)
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########################################
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# Pack for Python 2, with 'unicode' type, 'str' type, and 'long' type
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def _pack2(obj, fp):
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"""
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Serialize a Python object into MessagePack bytes.
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Args:
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obj: a Python object
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fp: a .write()-supporting file-like object
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Returns:
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None.
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Raises:
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UnsupportedType(PackException):
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Object type not supported for packing.
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Example:
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>>> f = open('test.bin', 'wb')
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>>> umsgpack.pack({u"compact": True, u"schema": 0}, f)
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>>>
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"""
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global compatibility
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if obj is None:
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_pack_nil(obj, fp)
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elif isinstance(obj, bool):
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_pack_boolean(obj, fp)
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elif isinstance(obj, int) or isinstance(obj, long):
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_pack_integer(obj, fp)
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elif isinstance(obj, float):
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_pack_float(obj, fp)
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elif compatibility and isinstance(obj, unicode):
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_pack_oldspec_raw(bytes(obj), fp)
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elif compatibility and isinstance(obj, bytes):
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_pack_oldspec_raw(obj, fp)
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elif isinstance(obj, unicode):
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_pack_string(obj, fp)
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elif isinstance(obj, str):
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_pack_binary(obj, fp)
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elif isinstance(obj, list) or isinstance(obj, tuple):
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_pack_array(obj, fp)
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elif isinstance(obj, dict):
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_pack_map(obj, fp)
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elif isinstance(obj, Ext):
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_pack_ext(obj, fp)
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else:
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raise UnsupportedTypeException("unsupported type: %s" % str(type(obj)))
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# Pack for Python 3, with unicode 'str' type, 'bytes' type, and no 'long' type
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def _pack3(obj, fp):
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"""
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Serialize a Python object into MessagePack bytes.
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Args:
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obj: a Python object
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fp: a .write()-supporting file-like object
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Returns:
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None.
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Raises:
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UnsupportedType(PackException):
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Object type not supported for packing.
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Example:
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>>> f = open('test.bin', 'wb')
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>>> umsgpack.pack({u"compact": True, u"schema": 0}, f)
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>>>
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"""
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global compatibility
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if obj is None:
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_pack_nil(obj, fp)
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elif isinstance(obj, bool):
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_pack_boolean(obj, fp)
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elif isinstance(obj, int):
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_pack_integer(obj, fp)
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elif isinstance(obj, float):
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_pack_float(obj, fp)
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elif compatibility and isinstance(obj, str):
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_pack_oldspec_raw(obj.encode('utf-8'), fp)
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elif compatibility and isinstance(obj, bytes):
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_pack_oldspec_raw(obj, fp)
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elif isinstance(obj, str):
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_pack_string(obj, fp)
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elif isinstance(obj, bytes):
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_pack_binary(obj, fp)
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elif isinstance(obj, list) or isinstance(obj, tuple):
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_pack_array(obj, fp)
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elif isinstance(obj, dict):
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_pack_map(obj, fp)
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elif isinstance(obj, Ext):
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_pack_ext(obj, fp)
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else:
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raise UnsupportedTypeException("unsupported type: %s" % str(type(obj)))
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def _packb2(obj):
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"""
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Serialize a Python object into MessagePack bytes.
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Args:
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obj: a Python object
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Returns:
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A 'str' containing serialized MessagePack bytes.
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Raises:
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UnsupportedType(PackException):
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Object type not supported for packing.
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Example:
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>>> umsgpack.packb({u"compact": True, u"schema": 0})
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'\x82\xa7compact\xc3\xa6schema\x00'
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>>>
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"""
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fp = io.BytesIO()
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_pack2(obj, fp)
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return fp.getvalue()
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def _packb3(obj):
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"""
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Serialize a Python object into MessagePack bytes.
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Args:
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obj: a Python object
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Returns:
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A 'bytes' containing serialized MessagePack bytes.
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Raises:
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UnsupportedType(PackException):
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Object type not supported for packing.
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Example:
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>>> umsgpack.packb({u"compact": True, u"schema": 0})
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b'\x82\xa7compact\xc3\xa6schema\x00'
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>>>
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"""
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fp = io.BytesIO()
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_pack3(obj, fp)
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return fp.getvalue()
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################################################################################
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### Unpacking
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################################################################################
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def _read_except(fp, n):
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data = fp.read(n)
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if len(data) < n:
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raise InsufficientDataException()
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return data
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def _unpack_integer(code, fp):
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if (ord(code) & 0xe0) == 0xe0:
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return struct.unpack("b", code)[0]
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elif code == b'\xd0':
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return struct.unpack("b", _read_except(fp, 1))[0]
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elif code == b'\xd1':
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return struct.unpack(">h", _read_except(fp, 2))[0]
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elif code == b'\xd2':
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return struct.unpack(">i", _read_except(fp, 4))[0]
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elif code == b'\xd3':
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return struct.unpack(">q", _read_except(fp, 8))[0]
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elif (ord(code) & 0x80) == 0x00:
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return struct.unpack("B", code)[0]
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elif code == b'\xcc':
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return struct.unpack("B", _read_except(fp, 1))[0]
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elif code == b'\xcd':
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return struct.unpack(">H", _read_except(fp, 2))[0]
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|
elif code == b'\xce':
|
|
return struct.unpack(">I", _read_except(fp, 4))[0]
|
|
elif code == b'\xcf':
|
|
return struct.unpack(">Q", _read_except(fp, 8))[0]
|
|
raise Exception("logic error, not int: 0x%02x" % ord(code))
|
|
|
|
def _unpack_reserved(code, fp):
|
|
if code == b'\xc1':
|
|
raise ReservedCodeException("encountered reserved code: 0x%02x" % ord(code))
|
|
raise Exception("logic error, not reserved code: 0x%02x" % ord(code))
|
|
|
|
def _unpack_nil(code, fp):
|
|
if code == b'\xc0':
|
|
return None
|
|
raise Exception("logic error, not nil: 0x%02x" % ord(code))
|
|
|
|
def _unpack_boolean(code, fp):
|
|
if code == b'\xc2':
|
|
return False
|
|
elif code == b'\xc3':
|
|
return True
|
|
raise Exception("logic error, not boolean: 0x%02x" % ord(code))
|
|
|
|
def _unpack_float(code, fp):
|
|
if code == b'\xca':
|
|
return struct.unpack(">f", _read_except(fp, 4))[0]
|
|
elif code == b'\xcb':
|
|
return struct.unpack(">d", _read_except(fp, 8))[0]
|
|
raise Exception("logic error, not float: 0x%02x" % ord(code))
|
|
|
|
def _unpack_string(code, fp):
|
|
if (ord(code) & 0xe0) == 0xa0:
|
|
length = ord(code) & ~0xe0
|
|
elif code == b'\xd9':
|
|
length = struct.unpack("B", _read_except(fp, 1))[0]
|
|
elif code == b'\xda':
|
|
length = struct.unpack(">H", _read_except(fp, 2))[0]
|
|
elif code == b'\xdb':
|
|
length = struct.unpack(">I", _read_except(fp, 4))[0]
|
|
else:
|
|
raise Exception("logic error, not string: 0x%02x" % ord(code))
|
|
|
|
# Always return raw bytes in compatibility mode
|
|
global compatibility
|
|
if compatibility:
|
|
return _read_except(fp, length)
|
|
|
|
try:
|
|
return bytes.decode(_read_except(fp, length), 'utf-8')
|
|
except UnicodeDecodeError:
|
|
raise InvalidStringException("unpacked string is not utf-8")
|
|
|
|
def _unpack_binary(code, fp):
|
|
if code == b'\xc4':
|
|
length = struct.unpack("B", _read_except(fp, 1))[0]
|
|
elif code == b'\xc5':
|
|
length = struct.unpack(">H", _read_except(fp, 2))[0]
|
|
elif code == b'\xc6':
|
|
length = struct.unpack(">I", _read_except(fp, 4))[0]
|
|
else:
|
|
raise Exception("logic error, not binary: 0x%02x" % ord(code))
|
|
|
|
return _read_except(fp, length)
|
|
|
|
def _unpack_ext(code, fp):
|
|
if code == b'\xd4':
|
|
length = 1
|
|
elif code == b'\xd5':
|
|
length = 2
|
|
elif code == b'\xd6':
|
|
length = 4
|
|
elif code == b'\xd7':
|
|
length = 8
|
|
elif code == b'\xd8':
|
|
length = 16
|
|
elif code == b'\xc7':
|
|
length = struct.unpack("B", _read_except(fp, 1))[0]
|
|
elif code == b'\xc8':
|
|
length = struct.unpack(">H", _read_except(fp, 2))[0]
|
|
elif code == b'\xc9':
|
|
length = struct.unpack(">I", _read_except(fp, 4))[0]
|
|
else:
|
|
raise Exception("logic error, not ext: 0x%02x" % ord(code))
|
|
|
|
return Ext(ord(_read_except(fp, 1)), _read_except(fp, length))
|
|
|
|
def _unpack_array(code, fp):
|
|
if (ord(code) & 0xf0) == 0x90:
|
|
length = (ord(code) & ~0xf0)
|
|
elif code == b'\xdc':
|
|
length = struct.unpack(">H", _read_except(fp, 2))[0]
|
|
elif code == b'\xdd':
|
|
length = struct.unpack(">I", _read_except(fp, 4))[0]
|
|
else:
|
|
raise Exception("logic error, not array: 0x%02x" % ord(code))
|
|
|
|
return [_unpack(fp) for i in xrange(length)]
|
|
|
|
def _deep_list_to_tuple(obj):
|
|
if isinstance(obj, list):
|
|
return tuple([_deep_list_to_tuple(e) for e in obj])
|
|
return obj
|
|
|
|
def _unpack_map(code, fp):
|
|
if (ord(code) & 0xf0) == 0x80:
|
|
length = (ord(code) & ~0xf0)
|
|
elif code == b'\xde':
|
|
length = struct.unpack(">H", _read_except(fp, 2))[0]
|
|
elif code == b'\xdf':
|
|
length = struct.unpack(">I", _read_except(fp, 4))[0]
|
|
else:
|
|
raise Exception("logic error, not map: 0x%02x" % ord(code))
|
|
|
|
d = {}
|
|
for i in xrange(length):
|
|
# Unpack key
|
|
k = _unpack(fp)
|
|
|
|
if isinstance(k, list):
|
|
# Attempt to convert list into a hashable tuple
|
|
k = _deep_list_to_tuple(k)
|
|
elif not isinstance(k, collections.Hashable):
|
|
raise UnhashableKeyException("encountered unhashable key: %s, %s" % (str(k), str(type(k))))
|
|
elif k in d:
|
|
raise DuplicateKeyException("encountered duplicate key: %s, %s" % (str(k), str(type(k))))
|
|
|
|
# Unpack value
|
|
v = _unpack(fp)
|
|
|
|
try:
|
|
d[k] = v
|
|
except TypeError:
|
|
raise UnhashableKeyException("encountered unhashable key: %s" % str(k))
|
|
return d
|
|
|
|
def _unpack(fp):
|
|
code = _read_except(fp, 1)
|
|
return _unpack_dispatch_table[code](code, fp)
|
|
|
|
########################################
|
|
|
|
def _unpack2(fp):
|
|
"""
|
|
Deserialize MessagePack bytes into a Python object.
|
|
|
|
Args:
|
|
fp: a .read()-supporting file-like object
|
|
|
|
Returns:
|
|
A Python object.
|
|
|
|
Raises:
|
|
InsufficientDataException(UnpackException):
|
|
Insufficient data to unpack the encoded object.
|
|
InvalidStringException(UnpackException):
|
|
Invalid UTF-8 string encountered during unpacking.
|
|
ReservedCodeException(UnpackException):
|
|
Reserved code encountered during unpacking.
|
|
UnhashableKeyException(UnpackException):
|
|
Unhashable key encountered during map unpacking.
|
|
The serialized map cannot be deserialized into a Python dictionary.
|
|
DuplicateKeyException(UnpackException):
|
|
Duplicate key encountered during map unpacking.
|
|
|
|
Example:
|
|
>>> f = open('test.bin', 'rb')
|
|
>>> umsgpack.unpackb(f)
|
|
{u'compact': True, u'schema': 0}
|
|
>>>
|
|
"""
|
|
return _unpack(fp)
|
|
|
|
def _unpack3(fp):
|
|
"""
|
|
Deserialize MessagePack bytes into a Python object.
|
|
|
|
Args:
|
|
fp: a .read()-supporting file-like object
|
|
|
|
Returns:
|
|
A Python object.
|
|
|
|
Raises:
|
|
InsufficientDataException(UnpackException):
|
|
Insufficient data to unpack the encoded object.
|
|
InvalidStringException(UnpackException):
|
|
Invalid UTF-8 string encountered during unpacking.
|
|
ReservedCodeException(UnpackException):
|
|
Reserved code encountered during unpacking.
|
|
UnhashableKeyException(UnpackException):
|
|
Unhashable key encountered during map unpacking.
|
|
The serialized map cannot be deserialized into a Python dictionary.
|
|
DuplicateKeyException(UnpackException):
|
|
Duplicate key encountered during map unpacking.
|
|
|
|
Example:
|
|
>>> f = open('test.bin', 'rb')
|
|
>>> umsgpack.unpackb(f)
|
|
{'compact': True, 'schema': 0}
|
|
>>>
|
|
"""
|
|
return _unpack(fp)
|
|
|
|
# For Python 2, expects a str object
|
|
def _unpackb2(s):
|
|
"""
|
|
Deserialize MessagePack bytes into a Python object.
|
|
|
|
Args:
|
|
s: a 'str' containing serialized MessagePack bytes
|
|
|
|
Returns:
|
|
A Python object.
|
|
|
|
Raises:
|
|
TypeError:
|
|
Packed data is not type 'str'.
|
|
InsufficientDataException(UnpackException):
|
|
Insufficient data to unpack the encoded object.
|
|
InvalidStringException(UnpackException):
|
|
Invalid UTF-8 string encountered during unpacking.
|
|
ReservedCodeException(UnpackException):
|
|
Reserved code encountered during unpacking.
|
|
UnhashableKeyException(UnpackException):
|
|
Unhashable key encountered during map unpacking.
|
|
The serialized map cannot be deserialized into a Python dictionary.
|
|
DuplicateKeyException(UnpackException):
|
|
Duplicate key encountered during map unpacking.
|
|
|
|
Example:
|
|
>>> umsgpack.unpackb(b'\x82\xa7compact\xc3\xa6schema\x00')
|
|
{u'compact': True, u'schema': 0}
|
|
>>>
|
|
"""
|
|
if not isinstance(s, str):
|
|
raise TypeError("packed data is not type 'str'")
|
|
return _unpack(io.BytesIO(s))
|
|
|
|
# For Python 3, expects a bytes object
|
|
def _unpackb3(s):
|
|
"""
|
|
Deserialize MessagePack bytes into a Python object.
|
|
|
|
Args:
|
|
s: a 'bytes' containing serialized MessagePack bytes
|
|
|
|
Returns:
|
|
A Python object.
|
|
|
|
Raises:
|
|
TypeError:
|
|
Packed data is not type 'bytes'.
|
|
InsufficientDataException(UnpackException):
|
|
Insufficient data to unpack the encoded object.
|
|
InvalidStringException(UnpackException):
|
|
Invalid UTF-8 string encountered during unpacking.
|
|
ReservedCodeException(UnpackException):
|
|
Reserved code encountered during unpacking.
|
|
UnhashableKeyException(UnpackException):
|
|
Unhashable key encountered during map unpacking.
|
|
The serialized map cannot be deserialized into a Python dictionary.
|
|
DuplicateKeyException(UnpackException):
|
|
Duplicate key encountered during map unpacking.
|
|
|
|
Example:
|
|
>>> umsgpack.unpackb(b'\x82\xa7compact\xc3\xa6schema\x00')
|
|
{'compact': True, 'schema': 0}
|
|
>>>
|
|
"""
|
|
if not isinstance(s, bytes):
|
|
raise TypeError("packed data is not type 'bytes'")
|
|
return _unpack(io.BytesIO(s))
|
|
|
|
################################################################################
|
|
### Module Initialization
|
|
################################################################################
|
|
|
|
def __init():
|
|
global pack
|
|
global packb
|
|
global unpack
|
|
global unpackb
|
|
global dump
|
|
global dumps
|
|
global load
|
|
global loads
|
|
global compatibility
|
|
global _float_size
|
|
global _unpack_dispatch_table
|
|
global xrange
|
|
|
|
# Compatibility mode for handling strings/bytes with the old specification
|
|
compatibility = False
|
|
|
|
# Auto-detect system float precision
|
|
if sys.float_info.mant_dig == 53:
|
|
_float_size = 64
|
|
else:
|
|
_float_size = 32
|
|
|
|
# Map packb and unpackb to the appropriate version
|
|
if sys.version_info[0] == 3:
|
|
pack = _pack3
|
|
packb = _packb3
|
|
dump = _pack3
|
|
dumps = _packb3
|
|
unpack = _unpack3
|
|
unpackb = _unpackb3
|
|
load = _unpack3
|
|
loads = _unpackb3
|
|
xrange = range
|
|
else:
|
|
pack = _pack2
|
|
packb = _packb2
|
|
dump = _pack2
|
|
dumps = _packb2
|
|
unpack = _unpack2
|
|
unpackb = _unpackb2
|
|
load = _unpack2
|
|
loads = _unpackb2
|
|
|
|
# Build a dispatch table for fast lookup of unpacking function
|
|
|
|
_unpack_dispatch_table = {}
|
|
# Fix uint
|
|
for code in range(0, 0x7f+1):
|
|
_unpack_dispatch_table[struct.pack("B", code)] = _unpack_integer
|
|
# Fix map
|
|
for code in range(0x80, 0x8f+1):
|
|
_unpack_dispatch_table[struct.pack("B", code)] = _unpack_map
|
|
# Fix array
|
|
for code in range(0x90, 0x9f+1):
|
|
_unpack_dispatch_table[struct.pack("B", code)] = _unpack_array
|
|
# Fix str
|
|
for code in range(0xa0, 0xbf+1):
|
|
_unpack_dispatch_table[struct.pack("B", code)] = _unpack_string
|
|
# Nil
|
|
_unpack_dispatch_table[b'\xc0'] = _unpack_nil
|
|
# Reserved
|
|
_unpack_dispatch_table[b'\xc1'] = _unpack_reserved
|
|
# Boolean
|
|
_unpack_dispatch_table[b'\xc2'] = _unpack_boolean
|
|
_unpack_dispatch_table[b'\xc3'] = _unpack_boolean
|
|
# Bin
|
|
for code in range(0xc4, 0xc6+1):
|
|
_unpack_dispatch_table[struct.pack("B", code)] = _unpack_binary
|
|
# Ext
|
|
for code in range(0xc7, 0xc9+1):
|
|
_unpack_dispatch_table[struct.pack("B", code)] = _unpack_ext
|
|
# Float
|
|
_unpack_dispatch_table[b'\xca'] = _unpack_float
|
|
_unpack_dispatch_table[b'\xcb'] = _unpack_float
|
|
# Uint
|
|
for code in range(0xcc, 0xcf+1):
|
|
_unpack_dispatch_table[struct.pack("B", code)] = _unpack_integer
|
|
# Int
|
|
for code in range(0xd0, 0xd3+1):
|
|
_unpack_dispatch_table[struct.pack("B", code)] = _unpack_integer
|
|
# Fixext
|
|
for code in range(0xd4, 0xd8+1):
|
|
_unpack_dispatch_table[struct.pack("B", code)] = _unpack_ext
|
|
# String
|
|
for code in range(0xd9, 0xdb+1):
|
|
_unpack_dispatch_table[struct.pack("B", code)] = _unpack_string
|
|
# Array
|
|
_unpack_dispatch_table[b'\xdc'] = _unpack_array
|
|
_unpack_dispatch_table[b'\xdd'] = _unpack_array
|
|
# Map
|
|
_unpack_dispatch_table[b'\xde'] = _unpack_map
|
|
_unpack_dispatch_table[b'\xdf'] = _unpack_map
|
|
# Negative fixint
|
|
for code in range(0xe0, 0xff+1):
|
|
_unpack_dispatch_table[struct.pack("B", code)] = _unpack_integer
|
|
|
|
__init()
|