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"""Identity policy for storing info in the jwt token.
"""
from .abc import AbstractIdentityPolicy
try:
import jwt
except ImportError: # pragma: no cover
jwt = None
AUTH_HEADER_NAME = 'Authorization'
AUTH_SCHEME = 'Bearer '
class JWTIdentityPolicy(AbstractIdentityPolicy):
def __init__(self, secret, algorithm='HS256'):
if jwt is None:
raise RuntimeError('Please install `PyJWT`')
self.secret = secret
self.algorithm = algorithm
async def identify(self, request):
header_identity = request.headers.get(AUTH_HEADER_NAME)
if header_identity is None:
return
if not header_identity.startswith(AUTH_SCHEME):
raise ValueError('Invalid authorization scheme. ' +
'Should be `Bearer <token>`')
token = header_identity.split(' ')[1].strip()
identity = jwt.decode(token,
self.secret,
algorithms=[self.algorithm])
return identity
async def remember(self, *args, **kwargs): # pragma: no cover
pass
async def forget(self, request, response): # pragma: no cover
pass
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