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import base64
import binascii
from urllib.parse import unquote
from authlib.common.encoding import to_unicode
def list_to_scope(scope):
"""Convert a list of scopes to a space separated string."""
if isinstance(scope, (set, tuple, list)):
return " ".join([to_unicode(s) for s in scope])
if scope is None:
return scope
return to_unicode(scope)
def scope_to_list(scope):
"""Convert a space separated string to a list of scopes."""
if isinstance(scope, (tuple, list, set)):
return [to_unicode(s) for s in scope]
elif scope is None:
return None
return scope.strip().split()
def extract_basic_authorization(headers):
auth = headers.get("Authorization")
if not auth or " " not in auth:
return None, None
auth_type, auth_token = auth.split(None, 1)
if auth_type.lower() != "basic":
return None, None
try:
query = to_unicode(base64.b64decode(auth_token))
except (binascii.Error, TypeError):
return None, None
if ":" in query:
username, password = query.split(":", 1)
return unquote(username), unquote(password)
return query, None
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