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# -*- coding: utf-8 -*-
"""
raven.utils.serializer.base
~~~~~~~~~~~~~~~~~~~~~~~~~~~
:copyright: (c) 2010-2012 by the Sentry Team, see AUTHORS for more details.
:license: BSD, see LICENSE for more details.
"""
from __future__ import absolute_import
import collections
import itertools
import types
from raven.utils.compat import text_type, binary_type, string_types, iteritems, \
class_types, PY2, PY3
from raven.utils.encoding import to_unicode
from .manager import manager as serialization_manager
from raven.utils import is_namedtuple
__all__ = ('Serializer',)
def has_sentry_metadata(value):
try:
return callable(value.__getattribute__('__sentry__'))
except Exception:
return False
class Serializer(object):
types = ()
def __init__(self, manager):
self.manager = manager
def can(self, value):
"""
Given ``value``, return a boolean describing whether this
serializer can operate on the given type
"""
return isinstance(value, self.types)
def serialize(self, value, **kwargs):
"""
Given ``value``, coerce into a JSON-safe type.
"""
return value
def recurse(self, value, max_depth=6, _depth=0, **kwargs):
"""
Given ``value``, recurse (using the parent serializer) to handle
coercing of newly defined values.
"""
string_max_length = kwargs.get('string_max_length', None)
_depth += 1
if _depth >= max_depth:
try:
value = text_type(repr(value))[:string_max_length]
except Exception as e:
import traceback
traceback.print_exc()
self.manager.logger.exception(e)
return text_type(type(value))
return self.manager.transform(value, max_depth=max_depth,
_depth=_depth, **kwargs)
class NamedtupleSerializer(Serializer):
types = (collections.namedtuple,)
def can(self, value):
"""
Given ``value``, return a boolean describing whether this
serializer can operate on the given type
"""
return is_namedtuple(value)
def serialize(self, value, **kwargs):
list_max_length = kwargs.get('list_max_length') or float('inf')
less_than = lambda x: x[0] < list_max_length
items = value._asdict().items()
takewhile = itertools.takewhile
x = dict([
(k, self.recurse(v, **kwargs))
for n, (k, v) in takewhile(less_than, enumerate(items))
])
return x
class IterableSerializer(Serializer):
types = (tuple, list, set, frozenset)
def serialize(self, value, **kwargs):
list_max_length = kwargs.get('list_max_length') or float('inf')
return tuple(
self.recurse(o, **kwargs)
for n, o
in itertools.takewhile(lambda x: x[0] < list_max_length,
enumerate(value))
)
class DictSerializer(Serializer):
types = (dict,)
def make_key(self, key):
if not isinstance(key, string_types):
return to_unicode(key)
return key
def serialize(self, value, **kwargs):
list_max_length = kwargs.get('list_max_length') or float('inf')
return dict(
(self.make_key(self.recurse(k, **kwargs)), self.recurse(v, **kwargs))
for n, (k, v)
in itertools.takewhile(lambda x: x[0] < list_max_length, enumerate(
iteritems(value)))
)
class UnicodeSerializer(Serializer):
types = (text_type,)
def serialize(self, value, **kwargs):
# try to return a reasonable string that can be decoded
# correctly by the server so it doesn't show up as \uXXX for each
# unicode character
# e.g. we want the output to be like: "u'רונית מגן'"
string_max_length = kwargs.get('string_max_length', None)
return repr(text_type('%s')) % (value[:string_max_length],)
class StringSerializer(Serializer):
types = (binary_type,)
def serialize(self, value, **kwargs):
string_max_length = kwargs.get('string_max_length', None)
if PY3:
return repr(value[:string_max_length])
try:
# Python2 madness: let's try to recover from developer's issues
# Try to process the string as if it was a unicode.
return "'" + value.decode('utf8')[:string_max_length] \
.encode('utf8') + "'"
except UnicodeDecodeError:
pass
return repr(value[:string_max_length])
class TypeSerializer(Serializer):
types = class_types
def can(self, value):
return not super(TypeSerializer, self).can(value) \
and has_sentry_metadata(value)
def serialize(self, value, **kwargs):
return self.recurse(value.__sentry__(), **kwargs)
class BooleanSerializer(Serializer):
types = (bool,)
def serialize(self, value, **kwargs):
return repr(bool(value))
class FloatSerializer(Serializer):
types = (float,)
def serialize(self, value, **kwargs):
# Wrap with repr to convert inf/nan to string
return repr(float(value))
class IntegerSerializer(Serializer):
types = (int,)
def serialize(self, value, **kwargs):
return repr(int(value))
class FunctionSerializer(Serializer):
types = (types.FunctionType,)
def serialize(self, value, **kwargs):
return '<function %s from %s at 0x%x>' % (
value.__name__, value.__module__, id(value))
if PY2:
class LongSerializer(Serializer):
types = (long,) # noqa
def serialize(self, value, **kwargs):
return repr(long(value)) # noqa
# register all serializers, order matters
serialization_manager.register(NamedtupleSerializer)
serialization_manager.register(IterableSerializer)
serialization_manager.register(DictSerializer)
serialization_manager.register(UnicodeSerializer)
serialization_manager.register(StringSerializer)
serialization_manager.register(TypeSerializer)
serialization_manager.register(BooleanSerializer)
serialization_manager.register(FloatSerializer)
serialization_manager.register(IntegerSerializer)
serialization_manager.register(FunctionSerializer)
if PY2:
serialization_manager.register(LongSerializer)