Add `allow_origin_regex` to CORSMiddleware. about starlette HOT 4 CLOSED

def matches(self, scope, origin):
    self.allow_origins = []
    regex = re.compile(self.allow_origin_regex)
    match = regex.match(origin)
    
    if match:
        self.allow_origins.append(origin)
        self.simple_headers["Access-Control-Allow-Origin"] = origin
        return functools.partial(self.simple_response, scope=scope, origin=origin)
    return PlainTextResponse(
        "Disallowed CORS origin", status_code=400,
    )

if origin is not None:
    if self.allow_origin_regex is not None:
        return self.matches(scope=scope, origin=origin)