|
|
import datetime
|
|
|
import functools
|
|
|
import decimal
|
|
|
|
|
|
__all__ = ['json', 'simplejson', 'stdjson']
|
|
|
|
|
|
|
|
|
def _is_aware(value):
|
|
|
"""
|
|
|
Determines if a given datetime.time is aware.
|
|
|
|
|
|
The logic is described in Python's docs:
|
|
|
http://docs.python.org/library/datetime.html#datetime.tzinfo
|
|
|
"""
|
|
|
return (value.tzinfo is not None
|
|
|
and value.tzinfo.utcoffset(value) is not None)
|
|
|
|
|
|
|
|
|
def _obj_dump(obj):
|
|
|
"""
|
|
|
Custom function for dumping objects to JSON, if obj has __json__ attribute
|
|
|
or method defined it will be used for serialization
|
|
|
|
|
|
:param obj:
|
|
|
"""
|
|
|
|
|
|
if isinstance(obj, complex):
|
|
|
return [obj.real, obj.imag]
|
|
|
# See "Date Time String Format" in the ECMA-262 specification.
|
|
|
# some code borrowed from django 1.4
|
|
|
elif isinstance(obj, datetime.datetime):
|
|
|
r = obj.isoformat()
|
|
|
if obj.microsecond:
|
|
|
r = r[:23] + r[26:]
|
|
|
if r.endswith('+00:00'):
|
|
|
r = r[:-6] + 'Z'
|
|
|
return r
|
|
|
elif isinstance(obj, datetime.date):
|
|
|
return obj.isoformat()
|
|
|
elif isinstance(obj, decimal.Decimal):
|
|
|
return str(obj)
|
|
|
elif isinstance(obj, datetime.time):
|
|
|
if _is_aware(obj):
|
|
|
raise ValueError("JSON can't represent timezone-aware times.")
|
|
|
r = obj.isoformat()
|
|
|
if obj.microsecond:
|
|
|
r = r[:12]
|
|
|
return r
|
|
|
elif isinstance(obj, set):
|
|
|
return list(obj)
|
|
|
elif hasattr(obj, '__json__'):
|
|
|
if callable(obj.__json__):
|
|
|
return obj.__json__()
|
|
|
else:
|
|
|
return obj.__json__
|
|
|
else:
|
|
|
raise NotImplementedError
|
|
|
|
|
|
|
|
|
# Import simplejson
|
|
|
try:
|
|
|
# import simplejson initially
|
|
|
import simplejson
|
|
|
|
|
|
def extended_encode(obj):
|
|
|
try:
|
|
|
return _obj_dump(obj)
|
|
|
except NotImplementedError:
|
|
|
pass
|
|
|
raise TypeError("%r is not JSON serializable" % (obj,))
|
|
|
# we handle decimals our own it makes unified behavior of json vs
|
|
|
# simplejson
|
|
|
simplejson.dumps = functools.partial(simplejson.dumps,
|
|
|
default=extended_encode,
|
|
|
use_decimal=False)
|
|
|
simplejson.dump = functools.partial(simplejson.dump,
|
|
|
default=extended_encode,
|
|
|
use_decimal=False)
|
|
|
except ImportError:
|
|
|
# no simplejson set it to None
|
|
|
simplejson = None
|
|
|
|
|
|
|
|
|
try:
|
|
|
# simplejson not found try out regular json module
|
|
|
import json
|
|
|
|
|
|
# extended JSON encoder for json
|
|
|
class ExtendedEncoder(json.JSONEncoder):
|
|
|
def default(self, obj):
|
|
|
try:
|
|
|
return _obj_dump(obj)
|
|
|
except NotImplementedError:
|
|
|
pass
|
|
|
return json.JSONEncoder.default(self, obj)
|
|
|
# monkey-patch JSON encoder to use extended version
|
|
|
json.dumps = functools.partial(json.dumps, cls=ExtendedEncoder)
|
|
|
json.dump = functools.partial(json.dump, cls=ExtendedEncoder)
|
|
|
|
|
|
except ImportError:
|
|
|
json = None
|
|
|
|
|
|
stdlib = json
|
|
|
|
|
|
# set all available json modules
|
|
|
if simplejson:
|
|
|
json = simplejson
|
|
|
elif json:
|
|
|
json = json
|
|
|
else:
|
|
|
raise ImportError('Could not find any json modules')
|
|
|
|
