How to connect to poloniex.com websocket api using a python library

Question

I am trying to connect to wss://api.poloniex.com and subscribe to ticker. I can\'t find any working example in python. I have tried to use autobahn/twisted and websocket-cli

Answer 1

What you are trying to accomplish can be done by using WAMP, specifically by using the WAMP modules of the autobahn library (that you are already trying to use).

After following their docs, I managed to set-up a simple example using autobahn and asyncio. The following example subscribes to the 'ticker' feed and prints the received values:

from autobahn.asyncio.wamp import ApplicationSession
from autobahn.asyncio.wamp import ApplicationRunner
from asyncio import coroutine


class PoloniexComponent(ApplicationSession):
    def onConnect(self):
        self.join(self.config.realm)

    @coroutine
    def onJoin(self, details):
        def onTicker(*args):
            print("Ticker event received:", args)

        try:
            yield from self.subscribe(onTicker, 'ticker')
        except Exception as e:
            print("Could not subscribe to topic:", e)


def main():
    runner = ApplicationRunner("wss://api.poloniex.com:443", "realm1")
    runner.run(PoloniexComponent)


if __name__ == "__main__":
    main()

You can find more details about WAMP programming with autobahn here: http://autobahn.ws/python/wamp/programming.html