How to validate a Host field in python pydantic?

Question

when you have host field to validate and host can be:

ipv4 address: 127.0.0.1

ipv6 address: 2001:db8:ff00:42

example.com

int.domain: puny£code.com

11.11.101.11.example.org

Any suggestion, how to validate the field using pydantic?

Answer 1

I'd look up some regexes and use constr(regex=...) or use some premade types from https://pydantic-docs.helpmanual.io/usage/types/ and https://pydantic-docs.helpmanual.io/usage/types/#urls

https://pydantic-docs.helpmanual.io/usage/types/#arguments-to-constr

then use

from typing import Union
from ipaddress import IPv4Address
from pydantic import BaseModel, HttpUrl, parse_obj_as


class X(BaseModel):
    host: Union[HttpUrl,IPv4Address,...]

parsed_host = parse_obj_as(X, your_host)