Django static files get from wrong url - django

Question

I am migrating an old Django 2.2 project to Django 3.2.
I use AWS Cloudfront and S3.
I have done most of the tasks to do. But i have something weird in my static files serving.
When 'static' template tag is called, the rendered url is "https//<cloudfront_url>/static.." instead of "https://<cloudfront_url>/static..".
The comma disapears ! It obviously results to a 404 not found.
It worked without any problem on Django2.2.
So for the moment i dirty patched this by doing a '.replace("https//", "https://")' on django static template tag.
My settings relatives to static files are :
# settings.py
STATICFILES_LOCATION = 'static'
AWS_CLOUDFRONT_DOMAIN = <idcloudfront>.cloudfront.net
STATICFILES_STORAGE = 'app.custom_storages.StaticStorage'
STATIC_URL = "https://%s/%s/" % (AWS_CLOUDFRONT_DOMAIN, STATICFILES_LOCATION)
AWS_STORAGE_STATIC_BUCKET_NAME = 'assets'
# app.custom_storages.py
class StaticStorage(S3Boto3Storage):
location = settings.STATICFILES_LOCATION
bucket_name = settings.AWS_STORAGE_STATIC_BUCKET_NAME
def __init__(self, *args, **kwargs):
kwargs['custom_domain'] = settings.AWS_CLOUDFRONT_DOMAIN
super(StaticStorage, self).__init__(*args, **kwargs)
this seems to come from django storage since staticfiles_storage.url('css/a_css_file.css') return url without ":".
Oh ok after further investigations i see that come from storages.storages.backends.S3boto3.S3Boto3Storage from django-storages package.
https://github.com/jschneier/django-storages/blob/master/storages/backends/s3boto3.py#L577
url = '{}//{}/{}{}'.format(
self.url_protocol,
self.custom_domain,
filepath_to_uri(name),
'?{}'.format(urlencode(params)) if params else '',
)
":" seems to be missing.
Temporary fixed it by adding url_protocol = "https:" in my StaticStorage custom class and opened an issue on django-storage library.