Pythonic bidirectional-rpc API built on top of ØMQ with pluggable encryption, authentication and heartbeating support.
- ØMQ transport layer.
- All native python types supported (msgpack).
- First citizen exceptions.
- Bi-bidirectional (server can initiate calls to connected clients).
- Encryption based on CURVE.
- Pluggable Authentication.
- Pluggable Heartbeating.
- Pluggable Remote Call Routing.
- Built-in proxy support. A server can delegate the work to another one.
- SyncClient (using zmq.REQ) to use within non event based processes. (Heartbeating, Authentication and job execution are not supported with the SyncClient.)
$ pip install pseudfrom pseud import Server server = Server('service') server.bind('tcp://127.0.0.1:5555') @server.register_rpc def hello(name): return 'Hello {0}'.format(name) await server.start() # this will block forever
from pseud import Client client = Client('service', io_loop=loop) client.connect('tcp://127.0.0.1:5555') # Assume we are inside a coroutine async with client: response = await client.hello('Charly') assert response == 'Hello Charly'
# to use within a non-asynchronous process or in a command interpreter from pseud import SyncClient client = SyncClient() client.connect('tcp://127.0.0.1:5555') async with client: assert client.hello('Charly') == 'Hello Charly'
It is important to note that the server needs to know which
peers are connected to it.
This is why the security_plugin trusted_peer comes handy.
It will register all peer id and be able to route messages to each of them.
from pseud import Server server = Server('service', security_plugin='trusted_peer') server.bind('tcp://127.0.0.1:5555') @server.register_rpc def hello(name): return 'Hello {0}'.format(name) await server.start() # this will block forever
The client needs to send its identity to the server. This is why plain
security plugin is used. The server will not check the password, he will just
take into consideration the user_id to perform the routing.
from pseud import Client client = Client('service', security_plugin='plain', user_id='alice', password='') client.connect('tcp://127.0.0.1:5555') # Action that the client will perform when # requested by the server. @client.register_rpc(name='draw.me.a.sheep') def sheep(): return 'beeeh'
Back on server side, we can send to it any commands the client is able to do.
# assume we are inside a coroutine sheep = await server.send_to('alice').draw.me.a.sheep() assert sheep == 'beeeh'