53 lines
1.8 KiB
Python
53 lines
1.8 KiB
Python
"""Preconfigured converters for ujson."""
|
|
from base64 import b85decode, b85encode
|
|
from datetime import date, datetime
|
|
from typing import Any, AnyStr, Type, TypeVar, Union
|
|
|
|
from ujson import dumps, loads
|
|
|
|
from cattrs._compat import AbstractSet
|
|
|
|
from ..converters import BaseConverter, Converter
|
|
from ..strategies import configure_union_passthrough
|
|
|
|
T = TypeVar("T")
|
|
|
|
|
|
class UjsonConverter(Converter):
|
|
def dumps(self, obj: Any, unstructure_as: Any = None, **kwargs: Any) -> str:
|
|
return dumps(self.unstructure(obj, unstructure_as=unstructure_as), **kwargs)
|
|
|
|
def loads(self, data: AnyStr, cl: Type[T], **kwargs: Any) -> T:
|
|
return self.structure(loads(data, **kwargs), cl)
|
|
|
|
|
|
def configure_converter(converter: BaseConverter):
|
|
"""
|
|
Configure the converter for use with the ujson library.
|
|
|
|
* bytes are serialized as base64 strings
|
|
* datetimes are serialized as ISO 8601
|
|
* sets are serialized as lists
|
|
"""
|
|
converter.register_unstructure_hook(
|
|
bytes, lambda v: (b85encode(v) if v else b"").decode("utf8")
|
|
)
|
|
converter.register_structure_hook(bytes, lambda v, _: b85decode(v))
|
|
|
|
converter.register_unstructure_hook(datetime, lambda v: v.isoformat())
|
|
converter.register_structure_hook(datetime, lambda v, _: datetime.fromisoformat(v))
|
|
converter.register_unstructure_hook(date, lambda v: v.isoformat())
|
|
converter.register_structure_hook(date, lambda v, _: date.fromisoformat(v))
|
|
configure_union_passthrough(Union[str, bool, int, float, None], converter)
|
|
|
|
|
|
def make_converter(*args: Any, **kwargs: Any) -> UjsonConverter:
|
|
kwargs["unstruct_collection_overrides"] = {
|
|
AbstractSet: list,
|
|
**kwargs.get("unstruct_collection_overrides", {}),
|
|
}
|
|
res = UjsonConverter(*args, **kwargs)
|
|
configure_converter(res)
|
|
|
|
return res
|