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('127.0.0.1', 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('127.0.0.1', 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('127.0.0.1', 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('127.0.0.1', 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('127.0.0.1', 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('127.0.0.1', 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 (#54).
from socketIO_client import SocketIO
# Skip server certificate verification
SocketIO('https://127.0.0.1', verify=False)
# Verify the server certificate
SocketIO('https://127.0.0.1', verify='server.crt')
# Verify the server certificate and encrypt using client certificate
socketIO = SocketIO('https://127.0.0.1', 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(
'127.0.0.1', 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('127.0.0.1', 8000)
socketIO.wait()
Don't wait forever.
from requests.exceptions import ConnectionError
from socketIO_client import SocketIO
try:
socket = SocketIO('127.0.0.1', 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!