[New Feature]Add grpc.default_authority option for authorization

[jcai]

I want to use grpc.default_authority to identify the current user.Could we add grpc.default_authority option to gRPC channel?

see:
wechaty/puppet-service#78
wechaty/go-wechaty#69
wechaty/java-wechaty#77

[jcai]

options = (('grpc.default_authority', token),)

[wj-Mcat]

In python grpclib tools, you need to feed auth_token to the metadata. refer to : grpclib client auth.

Can you read from the metadata ?

[jcai]

Use channel option,not metadata

[jcai]

refer:
https://stackoverflow.com/questions/48170761/how-do-i-specify-server-options
grpc/grpc#11299
https://stackoverflow.com/questions/42629047/how-to-increase-message-size-in-grpc-using-python

[wj-Mcat]

@jcai Yes, adding option to channel is easy, but there are some incompatibility problems between betterproto、 grpclib and grpcio.

• grpcio is the google official lib, but can't support betterproto. @huan refer to :
  Better Python support by integrating python-betterproto
  to address this problem, we should replace betterproto with grpcio.
• grpclib can custom options, refer to: Can the channel carry options？
  this lib is not active, I think we should replace it with grpcio.

[wj-Mcat]

Find a trick solution:

import asyncio

from chatie_grpc.wechaty import PuppetStub
from grpclib.client import Channel


async def main():
    target = "server-address:port"
    channel = Channel(host="server-address", port=port)
    # this is the private field 
    channel._authority = "your-token"
    sub = PuppetStub(channel)
    await sub.start()
    print("started ...")
    async for response in sub.event():
        print(response)

asyncio.run(main())

output:

started ...
EventResponse(type=22, payload='{"qrcode":"http://weixin.qq.com/x/I7He3Ou3_pzXqJFzAQ5M","status":2}')
EventResponse(type=22, payload='{"data":"{\\"status\\":\\"Waiting\\"}","status":2}')
EventResponse(type=22, payload='{"data":"{\\"status\\":\\"Waiting\\"}","status":2}')

this works for me.