socketIO-client3 0.8.0

A socket.io client library

socketIO-client

Here is a socket.io client library for Python. You can use it to write test code for your socket.io server.

Please note that this version implements socket.io protocol 1.x, which is not backwards compatible. If you want to communicate using socket.io protocol 0.9 (which is compatible with gevent-socketio), please use socketIO-client 0.5.7.2.

Installation

Install the package in an isolated environment.

VIRTUAL_ENV=$HOME/.virtualenv

# Prepare isolated environment
virtualenv $VIRTUAL_ENV

# Activate isolated environment
source $VIRTUAL_ENV/bin/activate

# Install package
pip install -U socketIO-client

Usage

Activate isolated environment.

VIRTUAL_ENV=$HOME/.virtualenv
source $VIRTUAL_ENV/bin/activate

Launch your socket.io server.

cd $(python -c "import os, socketIO_client;\
    print(os.path.dirname(socketIO_client.__file__))")

DEBUG=* node tests/serve.js  # Start socket.io server in terminal one
DEBUG=* node tests/proxy.js  # Start proxy server in terminal two
nosetests                    # Run tests in terminal three

For debugging information, run these commands first.

import logging
logging.getLogger('socketIO-client').setLevel(logging.DEBUG)
logging.basicConfig()

Emit.

from socketIO_client import SocketIO, LoggingNamespace

with SocketIO('localhost', 8000, LoggingNamespace) as socketIO:
    socketIO.emit('aaa')
    socketIO.wait(seconds=1)

Emit with callback.

from socketIO_client import SocketIO, LoggingNamespace

def on_bbb_response(*args):
    print('on_bbb_response', args)

with SocketIO('localhost', 8000, LoggingNamespace) as socketIO:
    socketIO.emit('bbb', {'xxx': 'yyy'}, on_bbb_response)
    socketIO.wait_for_callbacks(seconds=1)

Define events.

from socketIO_client import SocketIO, LoggingNamespace

def on_connect():
    print('connect')

def on_disconnect():
    print('disconnect')

def on_reconnect():
    print('reconnect')

def on_aaa_response(*args):
    print('on_aaa_response', args)

socketIO = SocketIO('localhost', 8000, LoggingNamespace)
socketIO.on('connect', on_connect)
socketIO.on('disconnect', on_disconnect)
socketIO.on('reconnect', on_reconnect)

# Listen
socketIO.on('aaa_response', on_aaa_response)
socketIO.emit('aaa')
socketIO.emit('aaa')
socketIO.wait(seconds=1)

# Stop listening
socketIO.off('aaa_response')
socketIO.emit('aaa')
socketIO.wait(seconds=1)

# Listen only once
socketIO.once('aaa_response', on_aaa_response)
socketIO.emit('aaa')  # Activate aaa_response
socketIO.emit('aaa')  # Ignore
socketIO.wait(seconds=1)

Define events in a namespace.

from socketIO_client import SocketIO, BaseNamespace

class Namespace(BaseNamespace):

    def on_aaa_response(self, *args):
        print('on_aaa_response', args)
        self.emit('bbb')

socketIO = SocketIO('localhost', 8000, Namespace)
socketIO.emit('aaa')
socketIO.wait(seconds=1)

Define standard events.

from socketIO_client import SocketIO, BaseNamespace

class Namespace(BaseNamespace):

    def on_connect(self):
        print('[Connected]')

    def on_reconnect(self):
        print('[Reconnected]')

    def on_disconnect(self):
        print('[Disconnected]')

socketIO = SocketIO('localhost', 8000, Namespace)
socketIO.wait(seconds=1)

Define different namespaces on a single socket.

from socketIO_client import SocketIO, BaseNamespace

class ChatNamespace(BaseNamespace):

    def on_aaa_response(self, *args):
        print('on_aaa_response', args)

class NewsNamespace(BaseNamespace):

    def on_aaa_response(self, *args):
        print('on_aaa_response', args)

socketIO = SocketIO('localhost', 8000)
chat_namespace = socketIO.define(ChatNamespace, '/chat')
news_namespace = socketIO.define(NewsNamespace, '/news')

chat_namespace.emit('aaa')
news_namespace.emit('aaa')
socketIO.wait(seconds=1)

Connect via SSL (https://github.com/invisibleroads/socketIO-client/issues/54).

from socketIO_client import SocketIO

# Skip server certificate verification
SocketIO('https://localhost', verify=False)
# Verify the server certificate
SocketIO('https://localhost', verify='server.crt')
# Verify the server certificate and encrypt using client certificate
socketIO = SocketIO('https://localhost', verify='server.crt', cert=(
    'client.crt', 'client.key'))

Specify params, headers, cookies, proxies thanks to the requests library.

from socketIO_client import SocketIO
from base64 import b64encode

SocketIO(
    'localhost', 8000,
    params={'q': 'qqq'},
    headers={'Authorization': 'Basic ' + b64encode('username:password')},
    cookies={'a': 'aaa'},
    proxies={'https': 'https://proxy.example.com:8080'})

Wait forever.

from socketIO_client import SocketIO

socketIO = SocketIO('localhost', 8000)
socketIO.wait()

Don’t wait forever.

from requests.exceptions import ConnectionError
from socketIO_client import SocketIO

try:
    socket = SocketIO('localhost', 8000, wait_for_connection=False)
    socket.wait()
except ConnectionError:
    print('The server is down. Try again later.')

License

This software is available under the MIT License.

Credits

• Guillermo Rauch wrote the socket.io specification.

• Hiroki Ohtani wrote websocket-client.

• Roderick Hodgson wrote a prototype for a Python client to a socket.io server.

• Alexandre Bourget wrote gevent-socketio, which is a socket.io server written in Python.

• Paul Kienzle, Zac Lee, Josh VanderLinden, Ian Fitzpatrick, Lucas Klein, Rui Chicoria, Travis Odom, Patrick Huber, Brad Campbell, Daniel, Sean Arietta, Sacha Stafyniak submitted code to expand support of the socket.io protocol.

• Bernard Pratz, Francis Bull wrote prototypes to support xhr-polling and jsonp-polling.

• Joe Palmer sponsored development.

• Eric Chen, Denis Zinevich, Thiago Hersan, Nayef Copty, Jörgen Karlsson, Branden Ghena, Tim Landscheidt, Matt Porritt, Matt Dainty, Thomaz de Oliveira dos Reis, Felix König, George Wilson, Andreas Strikos, Alessio Sergi Claudio Yacarini, Khairi Hafsham, Robbie Clarken suggested ways to make the connection more robust.

• Merlijn van Deen, Frederic Sureau, Marcus Cobden, Drew Hutchison, wuurrd, Adam Kecer, Alex Monk, Vishal P R, John Vandenberg, Thomas Grainger, Daniel Quinn, Adric Worley, Adam Roses Wight, Jan Včelák proposed changes that make the library more friendly and practical for you!

0.8.0 — - Merged pull requests from original client: #158, #154, #144, #142, #126

0.7

• Fixed thread cleanup

• Fixed disconnect detection if defined directly thanks to Andreas Strikos

• Fixed support for unicode payloads

0.6

• Upgraded to socket.io protocol 1.x thanks to Sean Arietta and Joe Palmer

• Fixed support for Python 3

• Fixed SSL support

• Added locks to fix concurrency issues with polling transport

• Added SocketIO.off() and SocketIO.once()

0.5

• Added support for Python 3

• Added support for jsonp-polling thanks to Bernard Pratz

• Added support for xhr-polling thanks to Francis Bull

• Added support for query params and cookies

• Fixed sending acknowledgments in custom namespaces thanks to Travis Odom

• Rewrote library to use coroutines instead of threads to save memory

0.4

• Added support for custom headers and proxies thanks to Rui and Sajal

• Added support for server-side callbacks thanks to Zac Lee

• Merged Channel functionality into BaseNamespace thanks to Alexandre Bourget

0.3

• Added support for secure connections

• Added SocketIO.wait()

• Improved exception handling in _RhythmicThread and _ListenerThread

0.2

• Added support for callbacks and channels thanks to Paul Kienzle

• Incorporated suggestions from Josh VanderLinden and Ian Fitzpatrick

0.1

• Wrapped code from StackOverflow

• Added exception handling to destructor in case of connection failure