Url to file serializer field

# shared/rest/fields/utils.py
from os.path import basename
import requests
from tempfile import TemporaryFile
from urllib.parse import urlsplit

from django.core.files import File

__all__ = ('url_to_file', )


def url_to_file(url: str):
    try:
        temp_file = TemporaryFile()
        result = requests.get(url, stream=True)
        for chunk in result.iter_content(chunk_size=4096):
            temp_file.write(chunk)
        temp_file.seek(0)
        return File(temp_file, name=basename(urlsplit(url).path))
    except Exception:
        pass


# shared/rest/fields/files.py
from rest_framework.serializers import FileField, ImageField

from .utils import url_to_file

__all__ = ('UrlToFileField', 'UrlToImageField')

class UrlToFieldMixin:

    def to_internal_value(self, data):
        """
        Transform the *incoming* url into a native File.
        """
        return url_to_file(data)


class UrlToFileField(UrlToFieldMixin, FileField):
    pass


class UrlToImageField(UrlToFieldMixin, ImageField):
    pass