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"""ACME JSON fields."""
import logging
import josepy as jose
import pyrfc3339
logger = logging.getLogger(__name__)
class Fixed(jose.Field):
"""Fixed field."""
def __init__(self, json_name, value):
self.value = value
super(Fixed, self).__init__(
json_name=json_name, default=value, omitempty=False)
def decode(self, value):
if value != self.value:
raise jose.DeserializationError('Expected {0!r}'.format(self.value))
return self.value
def encode(self, value):
if value != self.value:
logger.warning(
'Overriding fixed field (%s) with %r', self.json_name, value)
return value
class RFC3339Field(jose.Field):
"""RFC3339 field encoder/decoder.
Handles decoding/encoding between RFC3339 strings and aware (not
naive) `datetime.datetime` objects
(e.g. ``datetime.datetime.now(pytz.utc)``).
"""
@classmethod
def default_encoder(cls, value):
return pyrfc3339.generate(value)
@classmethod
def default_decoder(cls, value):
try:
return pyrfc3339.parse(value)
except ValueError as error:
raise jose.DeserializationError(error)
class Resource(jose.Field):
"""Resource MITM field."""
def __init__(self, resource_type, *args, **kwargs):
self.resource_type = resource_type
super(Resource, self).__init__(
'resource', default=resource_type, *args, **kwargs)
def decode(self, value):
if value != self.resource_type:
raise jose.DeserializationError(
'Wrong resource type: {0} instead of {1}'.format(
value, self.resource_type))
return value