Switch away use of urllib.request

[Rishabh Poddar]

This is an old lib and adds a user-agent that is banned by services like cloudflare. As a result, fetching JWKS from the core fails. We should switch to using requests lib like so:

def reload(self):
        try:
            with requests.get(self.uri, timeout=self.timeout_sec) as response:
                self.jwk_set = PyJWKSet.from_dict(response.json())  # type: ignore
                self.last_fetch_time = get_timestamp_ms()

(The above snippet is replacing the use of urllib.request in jwks.py file)

[Justin]

Here is an updated code snippet which will fit into the existing code, the previous code would not raise an Exception

        try:
            with requests.get(self.uri, timeout=self.timeout_sec) as response:
                response.raise_for_status() # raise exception
                self.jwk_set = PyJWKSet.from_dict(response.json())  # type: ignore
                self.last_fetch_time = get_timestamp_ms()
        except requests.HTTPError:
            raise JWKSRequestError("Failed to fetch jwk set from the configured uri")

[Rishabh Poddar]

This has been fixed in version >= 0.14.4