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Diffstat (limited to 'webapp/django/core/serializers/json.py')
-rw-r--r-- | webapp/django/core/serializers/json.py | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/webapp/django/core/serializers/json.py b/webapp/django/core/serializers/json.py new file mode 100644 index 0000000000..97e5bc9b26 --- /dev/null +++ b/webapp/django/core/serializers/json.py @@ -0,0 +1,68 @@ +""" +Serialize data to/from JSON +""" + +import datetime +from StringIO import StringIO + +from django.core.serializers.python import Serializer as PythonSerializer +from django.core.serializers.python import Deserializer as PythonDeserializer +from django.utils import datetime_safe +from django.utils import simplejson + +try: + import decimal +except ImportError: + from django.utils import _decimal as decimal # Python 2.3 fallback + +class Serializer(PythonSerializer): + """ + Convert a queryset to JSON. + """ + internal_use_only = False + + def end_serialization(self): + self.options.pop('stream', None) + self.options.pop('fields', None) + simplejson.dump(self.objects, self.stream, cls=DjangoJSONEncoder, **self.options) + + def getvalue(self): + if callable(getattr(self.stream, 'getvalue', None)): + return self.stream.getvalue() + +def Deserializer(stream_or_string, **options): + """ + Deserialize a stream or string of JSON data. + """ + if isinstance(stream_or_string, basestring): + stream = StringIO(stream_or_string) + else: + stream = stream_or_string + for obj in PythonDeserializer(simplejson.load(stream)): + yield obj + +class DjangoJSONEncoder(simplejson.JSONEncoder): + """ + JSONEncoder subclass that knows how to encode date/time and decimal types. + """ + + DATE_FORMAT = "%Y-%m-%d" + TIME_FORMAT = "%H:%M:%S" + + def default(self, o): + if isinstance(o, datetime.datetime): + d = datetime_safe.new_datetime(o) + return d.strftime("%s %s" % (self.DATE_FORMAT, self.TIME_FORMAT)) + elif isinstance(o, datetime.date): + d = datetime_safe.new_date(o) + return d.strftime(self.DATE_FORMAT) + elif isinstance(o, datetime.time): + return o.strftime(self.TIME_FORMAT) + elif isinstance(o, decimal.Decimal): + return str(o) + else: + return super(DjangoJSONEncoder, self).default(o) + +# Older, deprecated class name (for backwards compatibility purposes). +DateTimeAwareJSONEncoder = DjangoJSONEncoder + |