crossbar_template

Example that demonstrate WebSocket programming with Autobahn|Python on Twisted.
Fork from the twisted-native objects demo:
/~https://github.com/crossbario/autobahn-python/tree/master/examples/twisted/wamp/overview

These codes are a good starting point for own apps.

###Setup Prepare the virtualenv:

virtualenv venv

Switch to the virtualenv:

. venv/bin/activate

System level requirements:

pip install libssl-dev
pip install libffi-dev

Install deps

pip install autobahn
pip install twisted
pip install pyOpenSSL
pip install service_identity
pip install crossbar

Download code examples for frontend and backend:

wget https://raw.githubusercontent.com/crossbario/autobahn-python/master/examples/twisted/wamp/overview/backend.py
wget https://raw.githubusercontent.com/crossbario/autobahn-python/master/examples/twisted/wamp/overview/frontend.py

Change the AUTOBAHN_DEMO_ROUTER url (by default it is ws://localhost:8080/ws)

export AUTOBAHN_DEMO_ROUTER="wss://demo.crossbar.io/ws"

###Running the examples

Open three terminal sessions:

Running the router

crossbar init
crossbar start

Running the backend

python backend.py

Running the frontend

python frontend.py

Troubleshooting:

When I run

python backend.py

This error message appears

2016-10-11T15:03:29+0000 wamp.error.no_such_realm: no realm "crossbardemo" exists on this router
^C2016-10-11T15:03:35+0000 Received SIGINT, shutting down.

solution:
The name of the realm in crossbar_demo/.crossbar/config.json must be the same in the backend.py and frontend.py files (here it is "realm1").

if __name__ == '__main__':
    runner = ApplicationRunner(
        environ.get("AUTOBAHN_DEMO_ROUTER", u"ws://127.0.0.1:8080/ws"),
        # u"crossbardemo",
        u"realm1",
    )