FazBrowse GitHub Viewer
|
Trending
|
URL:
|
Home
Tools:
[Download Repo ZIP]
[View Raw Code]
[Original HTTPS Page]
msgpack-python/msgpack/fallback.py at master · filmor/msgpack-python · GitHub
filmor
/
msgpack-python
Public
forked from
msgpack/msgpack-python
Notifications
You must be signed in to change notification settings
Fork
0
Star
0
Code
Pull requests
0
Actions
Projects
Wiki
Security and quality
0
Insights
Additional navigation options
Code
Pull requests
Actions
Projects
Wiki
Security and quality
Insights
Expand file tree
Breadcrumbs
msgpack-python
/
msgpack
/
fallback.py
Copy path
More file actions
More file actions
Latest commit
History
History
History
830 lines (754 loc) · 31.1 KB
Breadcrumbs
msgpack-python
/
msgpack
/
fallback.py
Copy path
File metadata and controls
830 lines (754 loc) · 31.1 KB
Raw
Copy raw file
Download raw file
Open symbols panel
Edit and raw actions
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
"""Fallback pure Python implementation of msgpack"""
import
sys
import
array
import
struct
if
sys
.
version_info
[
0
]
==
3
:
PY3
=
True
int_types
=
int
Unicode
=
str
xrange
=
range
def
dict_iteritems
(
d
):
return
d
.
items
()
else
:
PY3
=
False
int_types
=
(
int
,
long
)
Unicode
=
unicode
def
dict_iteritems
(
d
):
return
d
.
iteritems
()
if
hasattr
(
sys
,
'pypy_version_info'
):
# cStringIO 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
):
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
msgpack
.
exceptions
import
(
BufferFull
,
OutOfData
,
UnpackValueError
,
PackValueError
,
ExtraData
)
from
msgpack
import
ExtType
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
unpack
(
stream
,
**
kwargs
):
"""
Unpack an object from `stream`.
Raises `ExtraData` when `packed` contains extra bytes.
See :class:`Unpacker` for options.
"""
unpacker
=
Unpacker
(
stream
,
**
kwargs
)
ret
=
unpacker
.
_fb_unpack
()
if
unpacker
.
_fb_got_extradata
():
raise
ExtraData
(
ret
,
unpacker
.
_fb_get_extradata
())
return
ret
def
unpackb
(
packed
,
**
kwargs
):
"""
Unpack an object from `packed`.
Raises `ExtraData` when `packed` contains extra bytes.
See :class:`Unpacker` for options.
"""
unpacker
=
Unpacker
(
None
,
**
kwargs
)
unpacker
.
feed
(
packed
)
try
:
ret
=
unpacker
.
_fb_unpack
()
except
OutOfData
:
raise
UnpackValueError
(
"Data is not enough."
)
if
unpacker
.
_fb_got_extradata
():
raise
ExtraData
(
ret
,
unpacker
.
_fb_get_extradata
())
return
ret
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(1024**2, max_buffer_size)`)
:param bool use_list:
If true, unpack msgpack array to Python list.
Otherwise, unpack to Python tuple. (default: True)
: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 encoding:
Encoding used for decoding msgpack raw.
If it is None (default), msgpack raw is deserialized to Python bytes.
:param str unicode_errors:
Used for decoding msgpack raw with *encoding*.
(default: `'strict'`)
:param int max_buffer_size:
Limits size of data waiting unpacked. 0 means system's INT_MAX (default).
Raises `BufferFull` exception when it is insufficient.
You shoud set this parameter when unpacking data from untrasted source.
:param int max_str_len:
Limits max length of str. (default: 2**31-1)
:param int max_bin_len:
Limits max length of bin. (default: 2**31-1)
:param int max_array_len:
Limits max length of array. (default: 2**31-1)
:param int max_map_len:
Limits max length of map. (default: 2**31-1)
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)
"""
def
__init__
(
self
,
file_like
=
None
,
read_size
=
0
,
use_list
=
True
,
object_hook
=
None
,
object_pairs_hook
=
None
,
list_hook
=
None
,
encoding
=
None
,
unicode_errors
=
'strict'
,
max_buffer_size
=
0
,
ext_hook
=
ExtType
,
max_str_len
=
2147483647
,
# 2**32-1
max_bin_len
=
2147483647
,
max_array_len
=
2147483647
,
max_map_len
=
2147483647
,
max_ext_len
=
2147483647
):
if
file_like
is
None
:
self
.
_fb_feeding
=
True
else
:
if
not
callable
(
file_like
.
read
):
raise
TypeError
(
"`file_like.read` must be callable"
)
self
.
file_like
=
file_like
self
.
_fb_feeding
=
False
#: array of bytes feeded.
self
.
_fb_buffers
=
[]
#: Which buffer we currently reads
self
.
_fb_buf_i
=
0
#: Which position we currently reads
self
.
_fb_buf_o
=
0
#: Total size of _fb_bufferes
self
.
_fb_buf_n
=
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 _fb_slopiness records.
self
.
_fb_sloppiness
=
0
self
.
_max_buffer_size
=
max_buffer_size
or
2
**
31
-
1
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
,
4096
)
self
.
_encoding
=
encoding
self
.
_unicode_errors
=
unicode_errors
self
.
_use_list
=
use_list
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
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
):
if
isinstance
(
next_bytes
,
array
.
array
):
next_bytes
=
next_bytes
.
tostring
()
elif
isinstance
(
next_bytes
,
bytearray
):
next_bytes
=
bytes
(
next_bytes
)
assert
self
.
_fb_feeding
if
(
self
.
_fb_buf_n
+
len
(
next_bytes
)
-
self
.
_fb_sloppiness
>
self
.
_max_buffer_size
):
raise
BufferFull
self
.
_fb_buf_n
+=
len
(
next_bytes
)
self
.
_fb_buffers
.
append
(
next_bytes
)
def
_fb_sloppy_consume
(
self
):
""" Gets rid of some of the used parts of the buffer. """
if
self
.
_fb_buf_i
:
for
i
in
xrange
(
self
.
_fb_buf_i
):
self
.
_fb_buf_n
-=
len
(
self
.
_fb_buffers
[
i
])
self
.
_fb_buffers
=
self
.
_fb_buffers
[
self
.
_fb_buf_i
:]
self
.
_fb_buf_i
=
0
if
self
.
_fb_buffers
:
self
.
_fb_sloppiness
=
self
.
_fb_buf_o
else
:
self
.
_fb_sloppiness
=
0
def
_fb_consume
(
self
):
""" Gets rid of the used parts of the buffer. """
if
self
.
_fb_buf_i
:
for
i
in
xrange
(
self
.
_fb_buf_i
):
self
.
_fb_buf_n
-=
len
(
self
.
_fb_buffers
[
i
])
self
.
_fb_buffers
=
self
.
_fb_buffers
[
self
.
_fb_buf_i
:]
self
.
_fb_buf_i
=
0
if
self
.
_fb_buffers
:
self
.
_fb_buffers
[
0
]
=
self
.
_fb_buffers
[
0
][
self
.
_fb_buf_o
:]
self
.
_fb_buf_n
-=
self
.
_fb_buf_o
else
:
self
.
_fb_buf_n
=
0
self
.
_fb_buf_o
=
0
self
.
_fb_sloppiness
=
0
def
_fb_got_extradata
(
self
):
if
self
.
_fb_buf_i
!=
len
(
self
.
_fb_buffers
):
return
True
if
self
.
_fb_feeding
:
return
False
if
not
self
.
file_like
:
return
False
if
self
.
file_like
.
read
(
1
):
return
True
return
False
def
__iter__
(
self
):
return
self
def
read_bytes
(
self
,
n
):
return
self
.
_fb_read
(
n
)
def
_fb_rollback
(
self
):
self
.
_fb_buf_i
=
0
self
.
_fb_buf_o
=
self
.
_fb_sloppiness
def
_fb_get_extradata
(
self
):
bufs
=
self
.
_fb_buffers
[
self
.
_fb_buf_i
:]
if
bufs
:
bufs
[
0
]
=
bufs
[
0
][
self
.
_fb_buf_o
:]
return
b''
.
join
(
bufs
)
def
_fb_read
(
self
,
n
,
write_bytes
=
None
):
buffs
=
self
.
_fb_buffers
# We have a redundant codepath for the most common case, such that
# pypy optimizes it properly. This is the case that the read fits
# in the current buffer.
if
(
write_bytes
is
None
and
self
.
_fb_buf_i
<
len
(
buffs
)
and
self
.
_fb_buf_o
+
n
<
len
(
buffs
[
self
.
_fb_buf_i
])):
self
.
_fb_buf_o
+=
n
return
buffs
[
self
.
_fb_buf_i
][
self
.
_fb_buf_o
-
n
:
self
.
_fb_buf_o
]
# The remaining cases.
ret
=
b''
while
len
(
ret
)
!=
n
:
sliced
=
n
-
len
(
ret
)
if
self
.
_fb_buf_i
==
len
(
buffs
):
if
self
.
_fb_feeding
:
break
to_read
=
sliced
if
self
.
_read_size
>
to_read
:
to_read
=
self
.
_read_size
tmp
=
self
.
file_like
.
read
(
to_read
)
if
not
tmp
:
break
buffs
.
append
(
tmp
)
self
.
_fb_buf_n
+=
len
(
tmp
)
continue
ret
+=
buffs
[
self
.
_fb_buf_i
][
self
.
_fb_buf_o
:
self
.
_fb_buf_o
+
sliced
]
self
.
_fb_buf_o
+=
sliced
if
self
.
_fb_buf_o
>=
len
(
buffs
[
self
.
_fb_buf_i
]):
self
.
_fb_buf_o
=
0
self
.
_fb_buf_i
+=
1
if
len
(
ret
)
!=
n
:
self
.
_fb_rollback
()
raise
OutOfData
if
write_bytes
is
not
None
:
write_bytes
(
ret
)
return
ret
def
_read_header
(
self
,
execute
=
EX_CONSTRUCT
,
write_bytes
=
None
):
typ
=
TYPE_IMMEDIATE
n
=
0
obj
=
None
c
=
self
.
_fb_read
(
1
,
write_bytes
)
b
=
ord
(
c
)
if
b
&
0b10000000
==
0
:
obj
=
b
elif
b
&
0b11100000
==
0b11100000
:
obj
=
struct
.
unpack
(
"b"
,
c
)[
0
]
elif
b
&
0b11100000
==
0b10100000
:
n
=
b
&
0b00011111
obj
=
self
.
_fb_read
(
n
,
write_bytes
)
typ
=
TYPE_RAW
if
n
>
self
.
_max_str_len
:
raise
ValueError
(
"%s exceeds max_str_len(%s)"
,
n
,
self
.
_max_str_len
)
elif
b
&
0b11110000
==
0b10010000
:
n
=
b
&
0b00001111
typ
=
TYPE_ARRAY
if
n
>
self
.
_max_array_len
:
raise
ValueError
(
"%s exceeds max_array_len(%s)"
,
n
,
self
.
_max_array_len
)
elif
b
&
0b11110000
==
0b10000000
:
n
=
b
&
0b00001111
typ
=
TYPE_MAP
if
n
>
self
.
_max_map_len
:
raise
ValueError
(
"%s exceeds max_map_len(%s)"
,
n
,
self
.
_max_map_len
)
elif
b
==
0xc0
:
obj
=
None
elif
b
==
0xc2
:
obj
=
False
elif
b
==
0xc3
:
obj
=
True
elif
b
==
0xc4
:
typ
=
TYPE_BIN
n
=
struct
.
unpack
(
"B"
,
self
.
_fb_read
(
1
,
write_bytes
))[
0
]
if
n
>
self
.
_max_bin_len
:
raise
ValueError
(
"%s exceeds max_bin_len(%s)"
%
(
n
,
self
.
_max_bin_len
))
obj
=
self
.
_fb_read
(
n
,
write_bytes
)
elif
b
==
0xc5
:
typ
=
TYPE_BIN
n
=
struct
.
unpack
(
">H"
,
self
.
_fb_read
(
2
,
write_bytes
))[
0
]
if
n
>
self
.
_max_bin_len
:
raise
ValueError
(
"%s exceeds max_bin_len(%s)"
%
(
n
,
self
.
_max_bin_len
))
obj
=
self
.
_fb_read
(
n
,
write_bytes
)
elif
b
==
0xc6
:
typ
=
TYPE_BIN
n
=
struct
.
unpack
(
">I"
,
self
.
_fb_read
(
4
,
write_bytes
))[
0
]
if
n
>
self
.
_max_bin_len
:
raise
ValueError
(
"%s exceeds max_bin_len(%s)"
%
(
n
,
self
.
_max_bin_len
))
obj
=
self
.
_fb_read
(
n
,
write_bytes
)
elif
b
==
0xc7
:
# ext 8
typ
=
TYPE_EXT
L
,
n
=
struct
.
unpack
(
'Bb'
,
self
.
_fb_read
(
2
,
write_bytes
))
if
L
>
self
.
_max_ext_len
:
raise
ValueError
(
"%s exceeds max_ext_len(%s)"
%
(
L
,
self
.
_max_ext_len
))
obj
=
self
.
_fb_read
(
L
,
write_bytes
)
elif
b
==
0xc8
:
# ext 16
typ
=
TYPE_EXT
L
,
n
=
struct
.
unpack
(
'>Hb'
,
self
.
_fb_read
(
3
,
write_bytes
))
if
L
>
self
.
_max_ext_len
:
raise
ValueError
(
"%s exceeds max_ext_len(%s)"
%
(
L
,
self
.
_max_ext_len
))
obj
=
self
.
_fb_read
(
L
,
write_bytes
)
elif
b
==
0xc9
:
# ext 32
typ
=
TYPE_EXT
L
,
n
=
struct
.
unpack
(
'>Ib'
,
self
.
_fb_read
(
5
,
write_bytes
))
if
L
>
self
.
_max_ext_len
:
raise
ValueError
(
"%s exceeds max_ext_len(%s)"
%
(
L
,
self
.
_max_ext_len
))
obj
=
self
.
_fb_read
(
L
,
write_bytes
)
elif
b
==
0xca
:
obj
=
struct
.
unpack
(
">f"
,
self
.
_fb_read
(
4
,
write_bytes
))[
0
]
elif
b
==
0xcb
:
obj
=
struct
.
unpack
(
">d"
,
self
.
_fb_read
(
8
,
write_bytes
))[
0
]
elif
b
==
0xcc
:
obj
=
struct
.
unpack
(
"B"
,
self
.
_fb_read
(
1
,
write_bytes
))[
0
]
elif
b
==
0xcd
:
obj
=
struct
.
unpack
(
">H"
,
self
.
_fb_read
(
2
,
write_bytes
))[
0
]
elif
b
==
0xce
:
obj
=
struct
.
unpack
(
">I"
,
self
.
_fb_read
(
4
,
write_bytes
))[
0
]
elif
b
==
0xcf
:
obj
=
struct
.
unpack
(
">Q"
,
self
.
_fb_read
(
8
,
write_bytes
))[
0
]
elif
b
==
0xd0
:
obj
=
struct
.
unpack
(
"b"
,
self
.
_fb_read
(
1
,
write_bytes
))[
0
]
elif
b
==
0xd1
:
obj
=
struct
.
unpack
(
">h"
,
self
.
_fb_read
(
2
,
write_bytes
))[
0
]
elif
b
==
0xd2
:
obj
=
struct
.
unpack
(
">i"
,
self
.
_fb_read
(
4
,
write_bytes
))[
0
]
elif
b
==
0xd3
:
obj
=
struct
.
unpack
(
">q"
,
self
.
_fb_read
(
8
,
write_bytes
))[
0
]
elif
b
==
0xd4
:
# fixext 1
typ
=
TYPE_EXT
if
self
.
_max_ext_len
<
1
:
raise
ValueError
(
"%s exceeds max_ext_len(%s)"
%
(
1
,
self
.
_max_ext_len
))
n
,
obj
=
struct
.
unpack
(
'b1s'
,
self
.
_fb_read
(
2
,
write_bytes
))
elif
b
==
0xd5
:
# fixext 2
typ
=
TYPE_EXT
if
self
.
_max_ext_len
<
2
:
raise
ValueError
(
"%s exceeds max_ext_len(%s)"
%
(
2
,
self
.
_max_ext_len
))
n
,
obj
=
struct
.
unpack
(
'b2s'
,
self
.
_fb_read
(
3
,
write_bytes
))
elif
b
==
0xd6
:
# fixext 4
typ
=
TYPE_EXT
if
self
.
_max_ext_len
<
4
:
raise
ValueError
(
"%s exceeds max_ext_len(%s)"
%
(
4
,
self
.
_max_ext_len
))
n
,
obj
=
struct
.
unpack
(
'b4s'
,
self
.
_fb_read
(
5
,
write_bytes
))
elif
b
==
0xd7
:
# fixext 8
typ
=
TYPE_EXT
if
self
.
_max_ext_len
<
8
:
raise
ValueError
(
"%s exceeds max_ext_len(%s)"
%
(
8
,
self
.
_max_ext_len
))
n
,
obj
=
struct
.
unpack
(
'b8s'
,
self
.
_fb_read
(
9
,
write_bytes
))
elif
b
==
0xd8
:
# fixext 16
typ
=
TYPE_EXT
if
self
.
_max_ext_len
<
16
:
raise
ValueError
(
"%s exceeds max_ext_len(%s)"
%
(
16
,
self
.
_max_ext_len
))
n
,
obj
=
struct
.
unpack
(
'b16s'
,
self
.
_fb_read
(
17
,
write_bytes
))
elif
b
==
0xd9
:
typ
=
TYPE_RAW
n
=
struct
.
unpack
(
"B"
,
self
.
_fb_read
(
1
,
write_bytes
))[
0
]
if
n
>
self
.
_max_str_len
:
raise
ValueError
(
"%s exceeds max_str_len(%s)"
,
n
,
self
.
_max_str_len
)
obj
=
self
.
_fb_read
(
n
,
write_bytes
)
elif
b
==
0xda
:
typ
=
TYPE_RAW
n
=
struct
.
unpack
(
">H"
,
self
.
_fb_read
(
2
,
write_bytes
))[
0
]
if
n
>
self
.
_max_str_len
:
raise
ValueError
(
"%s exceeds max_str_len(%s)"
,
n
,
self
.
_max_str_len
)
obj
=
self
.
_fb_read
(
n
,
write_bytes
)
elif
b
==
0xdb
:
typ
=
TYPE_RAW
n
=
struct
.
unpack
(
">I"
,
self
.
_fb_read
(
4
,
write_bytes
))[
0
]
if
n
>
self
.
_max_str_len
:
raise
ValueError
(
"%s exceeds max_str_len(%s)"
,
n
,
self
.
_max_str_len
)
obj
=
self
.
_fb_read
(
n
,
write_bytes
)
elif
b
==
0xdc
:
n
=
struct
.
unpack
(
">H"
,
self
.
_fb_read
(
2
,
write_bytes
))[
0
]
if
n
>
self
.
_max_array_len
:
raise
ValueError
(
"%s exceeds max_array_len(%s)"
,
n
,
self
.
_max_array_len
)
typ
=
TYPE_ARRAY
elif
b
==
0xdd
:
n
=
struct
.
unpack
(
">I"
,
self
.
_fb_read
(
4
,
write_bytes
))[
0
]
if
n
>
self
.
_max_array_len
:
raise
ValueError
(
"%s exceeds max_array_len(%s)"
,
n
,
self
.
_max_array_len
)
typ
=
TYPE_ARRAY
elif
b
==
0xde
:
n
=
struct
.
unpack
(
">H"
,
self
.
_fb_read
(
2
,
write_bytes
))[
0
]
if
n
>
self
.
_max_map_len
:
raise
ValueError
(
"%s exceeds max_map_len(%s)"
,
n
,
self
.
_max_map_len
)
typ
=
TYPE_MAP
elif
b
==
0xdf
:
n
=
struct
.
unpack
(
">I"
,
self
.
_fb_read
(
4
,
write_bytes
))[
0
]
if
n
>
self
.
_max_map_len
:
raise
ValueError
(
"%s exceeds max_map_len(%s)"
,
n
,
self
.
_max_map_len
)
typ
=
TYPE_MAP
else
:
raise
UnpackValueError
(
"Unknown header: 0x%x"
%
b
)
return
typ
,
n
,
obj
def
_fb_unpack
(
self
,
execute
=
EX_CONSTRUCT
,
write_bytes
=
None
):
typ
,
n
,
obj
=
self
.
_read_header
(
execute
,
write_bytes
)
if
execute
==
EX_READ_ARRAY_HEADER
:
if
typ
!=
TYPE_ARRAY
:
raise
UnpackValueError
(
"Expected array"
)
return
n
if
execute
==
EX_READ_MAP_HEADER
:
if
typ
!=
TYPE_MAP
:
raise
UnpackValueError
(
"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
.
_fb_unpack
(
EX_SKIP
,
write_bytes
)
return
ret
=
newlist_hint
(
n
)
for
i
in
xrange
(
n
):
ret
.
append
(
self
.
_fb_unpack
(
EX_CONSTRUCT
,
write_bytes
))
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
.
_fb_unpack
(
EX_SKIP
,
write_bytes
)
self
.
_fb_unpack
(
EX_SKIP
,
write_bytes
)
return
if
self
.
_object_pairs_hook
is
not
None
:
ret
=
self
.
_object_pairs_hook
(
(
self
.
_fb_unpack
(
EX_CONSTRUCT
,
write_bytes
),
self
.
_fb_unpack
(
EX_CONSTRUCT
,
write_bytes
))
for
_
in
xrange
(
n
))
else
:
ret
=
{}
for
_
in
xrange
(
n
):
key
=
self
.
_fb_unpack
(
EX_CONSTRUCT
,
write_bytes
)
ret
[
key
]
=
self
.
_fb_unpack
(
EX_CONSTRUCT
,
write_bytes
)
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
.
_encoding
is
not
None
:
obj
=
obj
.
decode
(
self
.
_encoding
,
self
.
_unicode_errors
)
return
obj
if
typ
==
TYPE_EXT
:
return
self
.
_ext_hook
(
n
,
obj
)
if
typ
==
TYPE_BIN
:
return
obj
assert
typ
==
TYPE_IMMEDIATE
return
obj
def
next
(
self
):
try
:
ret
=
self
.
_fb_unpack
(
EX_CONSTRUCT
,
None
)
self
.
_fb_sloppy_consume
()
return
ret
except
OutOfData
:
self
.
_fb_consume
()
raise
StopIteration
__next__
=
next
def
skip
(
self
,
write_bytes
=
None
):
self
.
_fb_unpack
(
EX_SKIP
,
write_bytes
)
self
.
_fb_consume
()
def
unpack
(
self
,
write_bytes
=
None
):
ret
=
self
.
_fb_unpack
(
EX_CONSTRUCT
,
write_bytes
)
self
.
_fb_consume
()
return
ret
def
read_array_header
(
self
,
write_bytes
=
None
):
ret
=
self
.
_fb_unpack
(
EX_READ_ARRAY_HEADER
,
write_bytes
)
self
.
_fb_consume
()
return
ret
def
read_map_header
(
self
,
write_bytes
=
None
):
ret
=
self
.
_fb_unpack
(
EX_READ_MAP_HEADER
,
write_bytes
)
self
.
_fb_consume
()
return
ret
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 str encoding:
Convert unicode to bytes with this encoding. (default: 'utf-8')
:param str unicode_errors:
Error handler for encoding unicode. (default: 'strict')
:param bool use_single_float:
Use single precision float type for float. (default: False)
:param bool autoreset:
Reset buffer after each pack and return it's 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 enable str8 type for unicode.
"""
def
__init__
(
self
,
default
=
None
,
encoding
=
'utf-8'
,
unicode_errors
=
'strict'
,
use_single_float
=
False
,
autoreset
=
True
,
use_bin_type
=
False
):
self
.
_use_float
=
use_single_float
self
.
_autoreset
=
autoreset
self
.
_use_bin_type
=
use_bin_type
self
.
_encoding
=
encoding
self
.
_unicode_errors
=
unicode_errors
self
.
_buffer
=
StringIO
()
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
,
isinstance
=
isinstance
):
default_used
=
False
while
True
:
if
nest_limit
<
0
:
raise
PackValueError
(
"recursion limit exceeded"
)
if
obj
is
None
:
return
self
.
_buffer
.
write
(
b"
\xc0
"
)
if
isinstance
(
obj
,
bool
):
if
obj
:
return
self
.
_buffer
.
write
(
b"
\xc3
"
)
return
self
.
_buffer
.
write
(
b"
\xc2
"
)
if
isinstance
(
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
))
raise
PackValueError
(
"Integer value out of range"
)
if
self
.
_use_bin_type
and
isinstance
(
obj
,
bytes
):
n
=
len
(
obj
)
if
n
<=
0xff
:
self
.
_buffer
.
write
(
struct
.
pack
(
'>BB'
,
0xc4
,
n
))
elif
n
<=
0xffff
:
self
.
_buffer
.
write
(
struct
.
pack
(
">BH"
,
0xc5
,
n
))
elif
n
<=
0xffffffff
:
self
.
_buffer
.
write
(
struct
.
pack
(
">BI"
,
0xc6
,
n
))
else
:
raise
PackValueError
(
"Bytes is too large"
)
return
self
.
_buffer
.
write
(
obj
)
if
isinstance
(
obj
, (
Unicode
,
bytes
)):
if
isinstance
(
obj
,
Unicode
):
if
self
.
_encoding
is
None
:
raise
TypeError
(
"Can't encode unicode string: "
"no encoding is specified"
)
obj
=
obj
.
encode
(
self
.
_encoding
,
self
.
_unicode_errors
)
n
=
len
(
obj
)
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
PackValueError
(
"String is too large"
)
return
self
.
_buffer
.
write
(
obj
)
if
isinstance
(
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
isinstance
(
obj
,
ExtType
):
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
isinstance
(
obj
, (
list
,
tuple
)):
n
=
len
(
obj
)
self
.
_fb_pack_array_header
(
n
)
for
i
in
xrange
(
n
):
self
.
_pack
(
obj
[
i
],
nest_limit
-
1
)
return
if
isinstance
(
obj
,
dict
):
return
self
.
_fb_pack_map_pairs
(
len
(
obj
),
dict_iteritems
(
obj
),
nest_limit
-
1
)
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
):
self
.
_pack
(
obj
)
ret
=
self
.
_buffer
.
getvalue
()
if
self
.
_autoreset
:
self
.
_buffer
=
StringIO
()
elif
USING_STRINGBUILDER
:
self
.
_buffer
=
StringIO
(
ret
)
return
ret
def
pack_map_pairs
(
self
,
pairs
):
self
.
_fb_pack_map_pairs
(
len
(
pairs
),
pairs
)
ret
=
self
.
_buffer
.
getvalue
()
if
self
.
_autoreset
:
self
.
_buffer
=
StringIO
()
elif
USING_STRINGBUILDER
:
self
.
_buffer
=
StringIO
(
ret
)
return
ret
def
pack_array_header
(
self
,
n
):
if
n
>=
2
**
32
:
raise
ValueError
self
.
_fb_pack_array_header
(
n
)
ret
=
self
.
_buffer
.
getvalue
()
if
self
.
_autoreset
:
self
.
_buffer
=
StringIO
()
elif
USING_STRINGBUILDER
:
self
.
_buffer
=
StringIO
(
ret
)
return
ret
def
pack_map_header
(
self
,
n
):
if
n
>=
2
**
32
:
raise
ValueError
self
.
_fb_pack_map_header
(
n
)
ret
=
self
.
_buffer
.
getvalue
()
if
self
.
_autoreset
:
self
.
_buffer
=
StringIO
()
elif
USING_STRINGBUILDER
:
self
.
_buffer
=
StringIO
(
ret
)
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
_fb_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
PackValueError
(
"Array is too large"
)
def
_fb_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
PackValueError
(
"Dict is too large"
)
def
_fb_pack_map_pairs
(
self
,
n
,
pairs
,
nest_limit
=
DEFAULT_RECURSE_LIMIT
):
self
.
_fb_pack_map_header
(
n
)
for
(
k
,
v
)
in
pairs
:
self
.
_pack
(
k
,
nest_limit
-
1
)
self
.
_pack
(
v
,
nest_limit
-
1
)
def
bytes
(
self
):
return
self
.
_buffer
.
getvalue
()
def
reset
(
self
):
self
.
_buffer
=
StringIO
()
Back
|
FazBrowse Home
|
New Git URL