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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