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77 lines
2.2 KiB
77 lines
2.2 KiB
try:
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import simplejson as json
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except ImportError:
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import json
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import uuid
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from datetime import date, datetime
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from decimal import Decimal
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from .exceptions import SerializationError, ImproperlyConfigured
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from .compat import string_types
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class TextSerializer(object):
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mimetype = 'text/plain'
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def loads(self, s):
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return s
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def dumps(self, data):
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if isinstance(data, string_types):
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return data
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raise SerializationError('Cannot serialize %r into text.' % data)
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class JSONSerializer(object):
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mimetype = 'application/json'
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def default(self, data):
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if isinstance(data, (date, datetime)):
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return data.isoformat()
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elif isinstance(data, Decimal):
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return float(data)
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elif isinstance(data, uuid.UUID):
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return str(data)
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raise TypeError("Unable to serialize %r (type: %s)" % (data, type(data)))
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def loads(self, s):
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try:
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return json.loads(s)
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except (ValueError, TypeError) as e:
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raise SerializationError(s, e)
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def dumps(self, data):
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# don't serialize strings
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if isinstance(data, string_types):
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return data
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try:
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return json.dumps(data, default=self.default, ensure_ascii=False)
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except (ValueError, TypeError) as e:
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raise SerializationError(data, e)
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DEFAULT_SERIALIZERS = {
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JSONSerializer.mimetype: JSONSerializer(),
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TextSerializer.mimetype: TextSerializer(),
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}
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class Deserializer(object):
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def __init__(self, serializers, default_mimetype='application/json'):
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try:
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self.default = serializers[default_mimetype]
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except KeyError:
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raise ImproperlyConfigured('Cannot find default serializer (%s)' % default_mimetype)
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self.serializers = serializers
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def loads(self, s, mimetype=None):
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if not mimetype:
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deserializer = self.default
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else:
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# split out charset
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mimetype = mimetype.split(';', 1)[0]
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try:
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deserializer = self.serializers[mimetype]
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except KeyError:
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raise SerializationError('Unknown mimetype, unable to deserialize: %s' % mimetype)
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return deserializer.loads(s)
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