signalr-client-py

Python client proxy for SignalR.

Requirements

Install requirements by running

pip install -r requirements

Signalr client is based on gevent which in turn requires Python headers. In Debian based distributions (such as Ubuntu and Raspbian) they are called python-dev.

Compatibility

Compatible with Python 2 and 3.

Usage

from requests import Session
from signalr import Connection

with Session() as session:
    #create a connection
    connection = Connection("http://localhost:5000/signalr", session)

    #get chat hub
    chat = connection.register_hub('chat')

    #start a connection
    connection.start()

    #create new chat message handler
    def print_received_message(data):
        print('received: ', data)

    #create new chat topic handler
    def print_topic(topic, user):
        print('topic: ', topic, user)

    #create error handler
    def print_error(error):
        print('error: ', error)

    #receive new chat messages from the hub
    chat.client.on('newMessageReceived', print_received_message)

    #change chat topic
    chat.client.on('topicChanged', print_topic)

    #process errors
    connection.error += print_error

    #start connection, optionally can be connection.start()
    with connection:

        #post new message
        chat.server.invoke('send', 'Python is here')

        #change chat topic
        chat.server.invoke('setTopic', 'Welcome python!')

        #invoke server method that throws error
        chat.server.invoke('requestError')

        #post another message
        chat.server.invoke('send', 'Bye-bye!')

        #wait a second before exit
        connection.wait(1)

Sample application

There is a sample application (ASP.NET vNext chat app) in examples folder. To run it:

Install ASP.NET 5 RC.
Go to examples/Chat folder.
dnvm upgrade
dnu restore
Install node and npm.
npm install
gulp
dnx web

Troubleshooting

dnvm is not available on Mac OS X after installation

Run source dnvm.sh.