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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.
Nmax_buffer_sizez Unpack failed: incomplete input)N) Unpackerr feed_unpackr2 r? RecursionErrorr r5 _got_extradatar3 _get_extradata)packedkwargsunpackerretr r r r unpackbn s
rM )r c C s t | t||S )z0Explicit type cast for legacy struct.unpack_from)struct unpack_fromr& )fbor r r _unpack_from s rU >H>IBbz>Hbz>Ib)r8 z>f) z>d)r rW )r8 rX )rZ z>Q)r rS )r z>h)r8 z>i)rZ z>qb1sb2sb4srZ b8s b16s) c @ s e Zd ZdZdddddddddddedddddfdd Zd
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efddZd d Zd d ZeZd d! Zd"d# Zd$d% Zd&d' Zd(d) ZdS ),rC a 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.
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_list_hook _object_hook_object_pairs_hook _ext_hook _max_str_len _max_bin_len_max_array_len _max_map_len _max_ext_len_stream_offset)r r read_sizeuse_listraw timestampstrict_map_key object_hookobject_pairs_hook list_hookunicode_errorsrB ext_hook max_str_len max_bin_len
max_array_len max_map_len max_ext_lenr r r r" sp
zUnpacker.__init__c C sr | j s
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Unpacker.feedc C s" | j | j| j 7 _ | j| _dS )z)Gets rid of the used parts of the buffer.N)r r r r) r r r _consume s zUnpacker._consumec C s | j t| jk S r )r r r r) r r r rG s zUnpacker._got_extradatac C s | j | jd S r )r r r) r r r rH s zUnpacker._get_extradatac C s | j |dd}| |S )NFraise_outofdata)_readr r nrL r r r
read_bytes s zUnpacker.read_bytesc C s8 | j ||d | j}| j||| }|t| | _|S )Nr )_reserver r r )r r r irL r r r r s
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zUnpacker._reservec C s t }d}d }| d | j| j }| jd7 _|d@ dkrD|}n|d@ dkr`d|dA }n|d@ dkr|d@ }t}|| jkrtd || jf | |}nL|d
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|dkrt|| j| jd }n | j| j }| j|7 _|| jkrtd|| jf | |}nd| krdkrln nft | \}}}| | t|| j| j\}}| j|7 _|| jkr^td|| jf | |}nd| krdkrn nXt | \}}| | t
|dkrt|| j| jd }n | j| j }| j|7 _nd | krd kr`n ndt | \}}}| j|k r(td|| jf | |d t|| j| j\}}| j|d 7 _nd | krxd krn n~t | \}}}| | t
|dkrt|| j| j\}n | j| j }| j|7 _|| jkrtd || jf | |}nd | krd!krnn nXt | \}}}| | t|| j| j\}| j|7 _|| j krtd
|| j f nd"| krd#krn nXt | \}}}| | t|| j| j\}| j|7 _|| j krtd|| j f n td$| |||fS )%Nr r r} z%s exceeds max_str_len(%s) z %s exceeds max_array_len(%s)z%s exceeds max_map_len(%s) F Tra rc z%s exceeds max_bin_len(%s)rd rf z%s exceeds max_ext_len(%s)rg rp rq ru rv rx ry rz r{ r| zUnknown header: 0x%x)TYPE_IMMEDIATEr r r TYPE_RAWr r? r
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r|S t|S |tkr|tkrt|D ]} t t qd S jd k r fddt|D }ni }t|D ]j} t } jrht|ttfkrhtdtt| tst|tkrt|} t ||< q, jd k r |}|S |tkrd S |tkr jrt|}n|d j }|S |t kr t|S |t krt|dkrdt t|} j!dkr6| " S j!d krJ| # S j!d
kr^| $ S | S n %|t|S |t&kst'|S ) NzExpected arrayz Expected mapc 3 s" | ]} t tfV qd S r )rE EX_CONSTRUCT).0_r) r r @ s z#Unpacker._unpack..z %s is not allowed for map keyutf_8r} r r r )(r EX_READ_ARRAY_HEADERr r? EX_READ_MAP_HEADERr EX_SKIPxrangerE r r r r r r< r r r; unicoder& r PY2sysinternr r r decoder TYPE_BINTYPE_EXTr7
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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.
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d kr$n n| jt d d |S d | kr|f q d S )?NFr zrecursion limit exceeded r BirS r BBri iz>Bbrm >BHrj i z>Bhrn >BIrk i z>Biro l z>BQrl l z>Bqrp TzInteger value out of range z%s is too largezutf-8zString is too largezMemoryview is too largez>Bfrg z>Bdrh r} r r r8 rZ r_ >BBrd re rf z%Cannot serialize %r where tzinfo=NonezCannot serialize %r)-r listr< r? r r' r int_typesrP packr
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list_typesr r r r r r r r r s
z Packer._packc C sF z| | W n t | _ Y nX | jrB| j }t | _|S d S r )r r r r r* )r r9 rL r r r r q s
z Packer.packc C s0 | t|| | jr,| j }t | _|S d S r )r r r r r* r )r pairsrL r r r pack_map_pairs| s
zPacker.pack_map_pairsc C s6 |dkr t | | | jr2| j }t | _|S d S Nr )r? r r r r* r r r r r pack_array_header s
zPacker.pack_array_headerc C s6 |dkr t | | | jr2| j }t | _|S d S r& )r? _pack_map_headerr r r* r r r r r pack_map_header s
zPacker.pack_map_headerc C sJ t |tstdd| kr&dks0n tdt |tsBtdt|}|dkrZtd|dkrp| jd n|d
kr| jd n|d kr| jd
n|dkr| jd nt|dkr| jd n^|dkr| jdt d| n<|dkr| jdt d| n| jdt d| | jt d| | j| d S )Nz typecode must have int type.r ztypecode should be 0-127zdata must have bytes typer zToo large datar r r r r8 r rZ r r_ r
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d S ) Nr r r r r r{ r r r| zDict is too larger0 r1 r r r r( s zPacker._pack_map_headerc C s< | | |D ](\}}| ||d | ||d qd S )Nr )r( r )r r r$ r kvr r r r s
zPacker._pack_map_pairsc C s |dkr"| j tdd| nn| jrH|dkrH| j tdd| nH|dkrh| j tdd | n(|d
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d S )Nr r r r r rv r r rw r r rx zRaw is too large)r r' rP r r r? r1 r r r r s zPacker._pack_raw_headerc C sv | j s| |S |dkr.| jtdd|S |dkrL| jtdd|S |dkrj| jtdd |S td
d S ) Nr r ra r r rb r r rc zBin is too large)r r r r' rP r r? r1 r r r r s
zPacker._pack_bin_headerc C s
| j S )z/Return internal buffer contents as bytes object)r r* r) r r r r& s z Packer.bytesc C s t | _dS )zYReset internal buffer.
This method is useful only when autoreset=False.
N)r r r) r r r reset s z Packer.resetc C s" t strt| S | j S dS )z Return view of internal buffer.N)USING_STRINGBUILDERr r# r& r getbufferr) r r r r6 s zPacker.getbuffer)NFTTFFN)r+ r, r- r r" DEFAULT_RECURSE_LIMITr r= r r r% r' r) r/ r r( r r r r& r4 r6 r r r r r s4 F
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