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"""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
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
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.
"""
View remainder of file in raw view
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