JSON serializer

[cyberbudy]

It there any json serializer?

[Krukov]

Hello,

No, there are not json serializer, only pickle supported. Can you tell a little bit more why do you need it ?

[cyberbudy]

We have a microservices product with multiple languages, mainly python, go and rust. We’d like to use cashews on python side, but the same cache might be available on other languages for optimization or migration purposes. Pickle is great for python but it’s hard/impossible in other languages

[Krukov]

Got you, thanks.

Originally one of a key feature of cashews is an ability to cache almost any object in code.

I have a one dirty recipe that can change serialization to json

import json
from cashews.picklers import Pickler

class JsonPickler(Pickler):
    @staticmethod
    def loads(value: bytes):
        return json.loads(value)

    @staticmethod
    def dumps(value) -> bytes:
        return json.dumps(value).encode()

...
backend = cache.setup(...)
backend._serializer.set_pickler(JsonPickler)

# 1714933479.152822 [0 172.17.0.1:48892] "SET" "key" "{\"test\": \"raw\"}" "PX" "300000"

As you can see cashews don't have public api to set your own serializer, I gonna extend it in a future ) Probably we need to add custom json encoder/decoder for some types like datetime because some features in cashews use it internally ( like early cache )

In general, I cannot guarantee that this will work well, and probably you know that aiocache have different serialization backends, so it may be a good choice for your case.

[cyberbudy]

Thanks for detailed answer. I'll try to use it

What if I create a PR with a new serializer?

[Krukov]

What if I create a PR with a new serializer?

it would be nice. I'll be happy so