/usr/lib/python3/dist-packages/bson/json_util.py is in python3-bson 2.6.3-1build1.
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#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Tools for using Python's :mod:`json` module with BSON documents.
This module provides two helper methods `dumps` and `loads` that wrap the
native :mod:`json` methods and provide explicit BSON conversion to and from
json. This allows for specialized encoding and decoding of BSON documents
into `Mongo Extended JSON
<http://www.mongodb.org/display/DOCS/Mongo+Extended+JSON>`_'s *Strict*
mode. This lets you encode / decode BSON documents to JSON even when
they use special BSON types.
Example usage (serialization)::
.. doctest::
>>> from bson import Binary, Code
>>> from bson.json_util import dumps
>>> dumps([{'foo': [1, 2]},
... {'bar': {'hello': 'world'}},
... {'code': Code("function x() { return 1; }")},
... {'bin': Binary("\x00\x01\x02\x03\x04")}])
'[{"foo": [1, 2]}, {"bar": {"hello": "world"}}, {"code": {"$scope": {}, "$code": "function x() { return 1; }"}}, {"bin": {"$type": "00", "$binary": "AAECAwQ="}}]'
Example usage (deserialization)::
.. doctest::
>>> from bson.json_util import loads
>>> loads('[{"foo": [1, 2]}, {"bar": {"hello": "world"}}, {"code": {"$scope": {}, "$code": "function x() { return 1; }"}}, {"bin": {"$type": "00", "$binary": "AAECAwQ="}}]')
[{u'foo': [1, 2]}, {u'bar': {u'hello': u'world'}}, {u'code': Code('function x() { return 1; }', {})}, {u'bin': Binary('\x00\x01\x02\x03\x04', 0)}]
Alternatively, you can manually pass the `default` to :func:`json.dumps`.
It won't handle :class:`~bson.binary.Binary` and :class:`~bson.code.Code`
instances (as they are extended strings you can't provide custom defaults),
but it will be faster as there is less recursion.
.. versionchanged:: 2.3
Added dumps and loads helpers to automatically handle conversion to and
from json and supports :class:`~bson.binary.Binary` and
:class:`~bson.code.Code`
.. versionchanged:: 1.9
Handle :class:`uuid.UUID` instances, whenever possible.
.. versionchanged:: 1.8
Handle timezone aware datetime instances on encode, decode to
timezone aware datetime instances.
.. versionchanged:: 1.8
Added support for encoding/decoding :class:`~bson.max_key.MaxKey`
and :class:`~bson.min_key.MinKey`, and for encoding
:class:`~bson.timestamp.Timestamp`.
.. versionchanged:: 1.2
Added support for encoding/decoding datetimes and regular expressions.
"""
import base64
import calendar
import datetime
import re
json_lib = True
try:
import json
except ImportError:
try:
import simplejson as json
except ImportError:
json_lib = False
import bson
from bson import EPOCH_AWARE, RE_TYPE
from bson.binary import Binary
from bson.code import Code
from bson.dbref import DBRef
from bson.max_key import MaxKey
from bson.min_key import MinKey
from bson.objectid import ObjectId
from bson.timestamp import Timestamp
from bson.py3compat import PY3, binary_type, string_types
_RE_OPT_TABLE = {
"i": re.I,
"l": re.L,
"m": re.M,
"s": re.S,
"u": re.U,
"x": re.X,
}
def dumps(obj, *args, **kwargs):
"""Helper function that wraps :class:`json.dumps`.
Recursive function that handles all BSON types including
:class:`~bson.binary.Binary` and :class:`~bson.code.Code`.
"""
if not json_lib:
raise Exception("No json library available")
return json.dumps(_json_convert(obj), *args, **kwargs)
def loads(s, *args, **kwargs):
"""Helper function that wraps :class:`json.loads`.
Automatically passes the object_hook for BSON type conversion.
"""
if not json_lib:
raise Exception("No json library available")
kwargs['object_hook'] = object_hook
return json.loads(s, *args, **kwargs)
def _json_convert(obj):
"""Recursive helper method that converts BSON types so they can be
converted into json.
"""
if hasattr(obj, 'iteritems') or hasattr(obj, 'items'): # PY3 support
return dict(((k, _json_convert(v)) for k, v in obj.items()))
elif hasattr(obj, '__iter__') and not isinstance(obj, string_types):
return list((_json_convert(v) for v in obj))
try:
return default(obj)
except TypeError:
return obj
def object_hook(dct):
if "$oid" in dct:
return ObjectId(str(dct["$oid"]))
if "$ref" in dct:
return DBRef(dct["$ref"], dct["$id"], dct.get("$db", None))
if "$date" in dct:
secs = float(dct["$date"]) / 1000.0
return EPOCH_AWARE + datetime.timedelta(seconds=secs)
if "$regex" in dct:
flags = 0
# PyMongo always adds $options but some other tools may not.
for opt in dct.get("$options", ""):
flags |= _RE_OPT_TABLE.get(opt, 0)
return re.compile(dct["$regex"], flags)
if "$minKey" in dct:
return MinKey()
if "$maxKey" in dct:
return MaxKey()
if "$binary" in dct:
if isinstance(dct["$type"], int):
dct["$type"] = "%02x" % dct["$type"]
subtype = int(dct["$type"], 16)
if subtype >= 0xffffff80: # Handle mongoexport values
subtype = int(dct["$type"][6:], 16)
return Binary(base64.b64decode(dct["$binary"].encode()), subtype)
if "$code" in dct:
return Code(dct["$code"], dct.get("$scope"))
if bson.has_uuid() and "$uuid" in dct:
return bson.uuid.UUID(dct["$uuid"])
return dct
def default(obj):
if isinstance(obj, ObjectId):
return {"$oid": str(obj)}
if isinstance(obj, DBRef):
return _json_convert(obj.as_doc())
if isinstance(obj, datetime.datetime):
# TODO share this code w/ bson.py?
if obj.utcoffset() is not None:
obj = obj - obj.utcoffset()
millis = int(calendar.timegm(obj.timetuple()) * 1000 +
obj.microsecond / 1000)
return {"$date": millis}
if isinstance(obj, RE_TYPE):
flags = ""
if obj.flags & re.IGNORECASE:
flags += "i"
if obj.flags & re.LOCALE:
flags += "l"
if obj.flags & re.MULTILINE:
flags += "m"
if obj.flags & re.DOTALL:
flags += "s"
if obj.flags & re.UNICODE:
flags += "u"
if obj.flags & re.VERBOSE:
flags += "x"
return {"$regex": obj.pattern,
"$options": flags}
if isinstance(obj, MinKey):
return {"$minKey": 1}
if isinstance(obj, MaxKey):
return {"$maxKey": 1}
if isinstance(obj, Timestamp):
return {"t": obj.time, "i": obj.inc}
if isinstance(obj, Code):
return {'$code': "%s" % obj, '$scope': obj.scope}
if isinstance(obj, Binary):
return {'$binary': base64.b64encode(obj).decode(),
'$type': "%02x" % obj.subtype}
if PY3 and isinstance(obj, binary_type):
return {'$binary': base64.b64encode(obj).decode(),
'$type': "00"}
if bson.has_uuid() and isinstance(obj, bson.uuid.UUID):
return {"$uuid": obj.hex}
raise TypeError("%r is not JSON serializable" % obj)
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