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try:
from urllib.parse import urlparse
except ImportError: # Fall back to Python 2
from urlparse import urlparse
# We may support more auth schemes in the future
class PopAuthScheme(object):
HTTP_GET = "GET"
HTTP_POST = "POST"
HTTP_PUT = "PUT"
HTTP_DELETE = "DELETE"
HTTP_PATCH = "PATCH"
_HTTP_METHODS = (HTTP_GET, HTTP_POST, HTTP_PUT, HTTP_DELETE, HTTP_PATCH)
# Internal design: https://identitydivision.visualstudio.com/DevEx/_git/AuthLibrariesApiReview?path=/PoPTokensProtocol/PopTokensProtocol.md
def __init__(self, http_method=None, url=None, nonce=None):
"""Create an auth scheme which is needed to obtain a Proof-of-Possession token.
:param str http_method:
Its value is an uppercase http verb, such as "GET" and "POST".
:param str url:
The url to be signed.
:param str nonce:
The nonce came from resource's challenge.
"""
if not (http_method and url and nonce):
# In the future, we may also support accepting an http_response as input
raise ValueError("All http_method, url and nonce are required parameters")
if http_method not in self._HTTP_METHODS:
raise ValueError("http_method must be uppercase, according to "
"https://datatracker.ietf.org/doc/html/draft-ietf-oauth-signed-http-request-03#section-3")
self._http_method = http_method
self._url = urlparse(url)
self._nonce = nonce