mirror of
https://github.com/SickGear/SickGear.git
synced 2024-12-21 10:13:39 +00:00
1010 lines
34 KiB
Python
1010 lines
34 KiB
Python
"""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
|
|
|
|
_NO_FORMAT_USED = ""
|
|
_MSGPACK_HEADERS = {
|
|
0xC4: (1, _NO_FORMAT_USED, TYPE_BIN),
|
|
0xC5: (2, ">H", TYPE_BIN),
|
|
0xC6: (4, ">I", TYPE_BIN),
|
|
0xC7: (2, "Bb", TYPE_EXT),
|
|
0xC8: (3, ">Hb", TYPE_EXT),
|
|
0xC9: (5, ">Ib", TYPE_EXT),
|
|
0xCA: (4, ">f"),
|
|
0xCB: (8, ">d"),
|
|
0xCC: (1, _NO_FORMAT_USED),
|
|
0xCD: (2, ">H"),
|
|
0xCE: (4, ">I"),
|
|
0xCF: (8, ">Q"),
|
|
0xD0: (1, "b"),
|
|
0xD1: (2, ">h"),
|
|
0xD2: (4, ">i"),
|
|
0xD3: (8, ">q"),
|
|
0xD4: (1, "b1s", TYPE_EXT),
|
|
0xD5: (2, "b2s", TYPE_EXT),
|
|
0xD6: (4, "b4s", TYPE_EXT),
|
|
0xD7: (8, "b8s", TYPE_EXT),
|
|
0xD8: (16, "b16s", TYPE_EXT),
|
|
0xD9: (1, _NO_FORMAT_USED, TYPE_RAW),
|
|
0xDA: (2, ">H", TYPE_RAW),
|
|
0xDB: (4, ">I", TYPE_RAW),
|
|
0xDC: (2, ">H", TYPE_ARRAY),
|
|
0xDD: (4, ">I", TYPE_ARRAY),
|
|
0xDE: (2, ">H", TYPE_MAP),
|
|
0xDF: (4, ">I", TYPE_MAP),
|
|
}
|
|
|
|
|
|
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(16*1024, 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 100*1024*1024 (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()
|
|
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
|
|
if remain_bytes + len(self._buffer) > self._max_buffer_size:
|
|
raise BufferFull
|
|
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):
|
|
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 0xC4 <= b <= 0xC6:
|
|
size, fmt, typ = _MSGPACK_HEADERS[b]
|
|
self._reserve(size)
|
|
if len(fmt) > 0:
|
|
n = _unpack_from(fmt, self._buffer, self._buff_i)[0]
|
|
else:
|
|
n = self._buffer[self._buff_i]
|
|
self._buff_i += size
|
|
if n > self._max_bin_len:
|
|
raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
|
|
obj = self._read(n)
|
|
elif 0xC7 <= b <= 0xC9:
|
|
size, fmt, typ = _MSGPACK_HEADERS[b]
|
|
self._reserve(size)
|
|
L, n = _unpack_from(fmt, self._buffer, self._buff_i)
|
|
self._buff_i += size
|
|
if L > self._max_ext_len:
|
|
raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
|
|
obj = self._read(L)
|
|
elif 0xCA <= b <= 0xD3:
|
|
size, fmt = _MSGPACK_HEADERS[b]
|
|
self._reserve(size)
|
|
if len(fmt) > 0:
|
|
obj = _unpack_from(fmt, self._buffer, self._buff_i)[0]
|
|
else:
|
|
obj = self._buffer[self._buff_i]
|
|
self._buff_i += size
|
|
elif 0xD4 <= b <= 0xD8:
|
|
size, fmt, typ = _MSGPACK_HEADERS[b]
|
|
if self._max_ext_len < size:
|
|
raise ValueError(
|
|
"%s exceeds max_ext_len(%s)" % (size, self._max_ext_len)
|
|
)
|
|
self._reserve(size + 1)
|
|
n, obj = _unpack_from(fmt, self._buffer, self._buff_i)
|
|
self._buff_i += size + 1
|
|
elif 0xD9 <= b <= 0xDB:
|
|
size, fmt, typ = _MSGPACK_HEADERS[b]
|
|
self._reserve(size)
|
|
if len(fmt) > 0:
|
|
(n,) = _unpack_from(fmt, self._buffer, self._buff_i)
|
|
else:
|
|
n = self._buffer[self._buff_i]
|
|
self._buff_i += size
|
|
if n > self._max_str_len:
|
|
raise ValueError("%s exceeds max_str_len(%s)" % (n, self._max_str_len))
|
|
obj = self._read(n)
|
|
elif 0xDC <= b <= 0xDD:
|
|
size, fmt, typ = _MSGPACK_HEADERS[b]
|
|
self._reserve(size)
|
|
(n,) = _unpack_from(fmt, self._buffer, self._buff_i)
|
|
self._buff_i += size
|
|
if n > self._max_array_len:
|
|
raise ValueError(
|
|
"%s exceeds max_array_len(%s)" % (n, self._max_array_len)
|
|
)
|
|
elif 0xDE <= b <= 0xDF:
|
|
size, fmt, typ = _MSGPACK_HEADERS[b]
|
|
self._reserve(size)
|
|
(n,) = _unpack_from(fmt, self._buffer, self._buff_i)
|
|
self._buff_i += size
|
|
if n > self._max_map_len:
|
|
raise ValueError("%s exceeds max_map_len(%s)" % (n, self._max_map_len))
|
|
else:
|
|
raise FormatError("Unknown header: 0x%x" % b)
|
|
return typ, n, obj
|
|
|
|
def _unpack(self, execute=EX_CONSTRUCT):
|
|
typ, n, obj = self._read_header()
|
|
|
|
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
|
|
|
|
if self._datetime and check(obj, _DateTime):
|
|
raise ValueError("Cannot serialize %r where tzinfo=None" % (obj,))
|
|
|
|
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()
|