Hi, I'm trying to attach CallCredentials to an RPC. This is what I've done,
using AccessTokenCallCredentials as an example:
class UsernamePasswordCallCredentials(grpc.AuthMetadataPlugin):
def __init__(self, username):
self._username = username
def __call__(self, context, callback):
print "in __call__"
metadata = (('x-custom-auth-ticket', self._username),)
callback(metadata, None)
call_creds =
metadata_call_credentials(UsernamePasswordCallCredentials("foo"))
channel = grpc.insecure_channel("localhost:50055")
stub = my_pb2_grpc.myStub(channel)
stub.ListUser(Empty(), credentials=call_creds)
Not only does my custom header not appear to be set, but I can't find an
evidence that UsernamePasswordCallCredentials.__call__ is ever being
called. Where am I going wrong?
Thanks,
Scott
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