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# Author: Jonas Keidel <[email protected]> # Author: Markus Schade <[email protected]> # # This file is part of cloud-init. See LICENSE file for license information. import base64 import binascii from cloudinit import url_helper, util def read_metadata(url, timeout=2, sec_between=2, retries=30): response = url_helper.readurl( url, timeout=timeout, sec_between=sec_between, retries=retries ) if not response.ok(): raise RuntimeError("unable to read metadata at %s" % url) return util.load_yaml(response.contents.decode()) def read_userdata(url, timeout=2, sec_between=2, retries=30): response = url_helper.readurl( url, timeout=timeout, sec_between=sec_between, retries=retries ) if not response.ok(): raise RuntimeError("unable to read userdata at %s" % url) return response.contents def maybe_b64decode(data: bytes) -> bytes: """base64 decode data If data is base64 encoded bytes, return b64decode(data). If not, return data unmodified. @param data: data as bytes. TypeError is raised if not bytes. """ if not isinstance(data, bytes): raise TypeError("data is '%s', expected bytes" % type(data)) try: return base64.b64decode(data, validate=True) except binascii.Error: return data