Skip to content
websocket client for python
Latest commit 0065c35 @liris Merge pull request #233 from JustAMan/master
Handle more built-in exceptions that are not derived from Exception



websocket-client module is WebSocket client for python. This provide the low level APIs for WebSocket. All APIs are the synchronous functions.

websocket-client supports only hybi-13.


  • LGPL


This module is tested on Python 2.7 and Python 3.x.

Type "python install" or "pip install websocket-client" to install.


from v0.16.0, we can install by "pip install websocket-client" for python 3.

This module depend on

  • six
  • backports.ssl_match_hostname for Python 2.x

How about Python 3

Now, we support python 3 on single source code from version 0.14.0. Thanks, @battlemidget and @ralphbean.

HTTP Proxy

Support websocket access via http proxy. The proxy server must allow "CONNECT" method to websocket port. Default squid setting is "ALLOWED TO CONNECT ONLY HTTPS PORT".

Current implementation of websocket-client is using "CONNECT" method via proxy.

example ..code:: python

import websocket ws = websocket.WebSocket() ws.connect("ws://", http_proxy_host="proxy_host_name", http_proxy_port=3128) :


Low Level API example ..code:: python

from websocket import create_connection ws = create_connection("ws://") print "Sending 'Hello, World'..." ws.send("Hello, World") print "Sent" print "Receiving..." result = ws.recv() print "Received '%s'" % result ws.close()

If you want to customize socket options, set sockopt.

sockopt example ..code:: python

from websocket import create_connection ws = create_connection("ws://",

sockopt=((socket.IPPROTO_TCP, socket.TCP_NODELAY),))

JavaScript websocket-like API example ..code:: python

import websocket import thread import time

def on_message(ws, message):
print message
def on_error(ws, error):
print error
def on_close(ws):
print "### closed ###"
def on_open(ws):
def run(*args):
for i in range(3):
time.sleep(1) ws.send("Hello %d" % i)

time.sleep(1) ws.close() print "thread terminating..."

thread.start_new_thread(run, ())

if __name__ == "__main__":

websocket.enableTrace(True) ws = websocket.WebSocketApp("ws://",

on_message = on_message, on_error = on_error, on_close = on_close)

ws.on_open = on_open ws.run_forever()


How to disable ssl cert verification?

Please set sslopt to {"cert_reqs": ssl.CERT_NONE}.

WebSocketApp sample ..code:: python

ws = websocket.WebSocketApp("wss://") ws.run_forever(sslopt={"cert_reqs": ssl.CERT_NONE})

create_connection sample ..code:: python

ws = websocket.create_connection("wss://",
sslopt={"cert_reqs": ssl.CERT_NONE})

WebSocket sample ..code:: python

ws = websocket.WebSocket(sslopt={"cert_reqs": ssl.CERT_NONE}) ws.connect("wss://")

How to disable hostname verification.

Please set sslopt to {"check_hostname": False}. (since v0.18.0)

WebSocketApp sample ..code:: python

ws = websocket.WebSocketApp("wss://") ws.run_forever(sslopt={"check_hostname": False})

create_connection sample ..code:: python

ws = websocket.create_connection("wss://",
sslopt={"check_hostname": False})

WebSocket sample ..code:: python

ws = websocket.WebSocket(sslopt={"check_hostname": False}) ws.connect("wss://")

How to enable SNI?

SNI support is available for Python 2.7.9+ and 3.2+. It will be enabled automatically whenever possible.

Sub Protocols.

The server needs to support sub protocols, please set the subprotocol like this.

Subprotocol sample ..code:: python

ws = websocket.create_connection("ws://", subprotocols=["binary", "base64"]) is simple WebSocket test(debug) tool.

sample for

$ ws://
Press Ctrl+C to quit
> Hello, WebSocket
< Hello, WebSocket
> How are you?
< How are you?


usage:: [-h] [-v [VERBOSE]] ws_url

WebSocket Simple Dump Tool

positional arguments:
ws_url websocket url. ex. ws://
optional arguments:
-h, --help show this help message and exit
-v VERBOSE, --verbose VERBOSE
 set verbose mode. If set to 1, show opcode. If set to 2, enable to trace websocket module


$ ws://
$ ws:// -v
$ ws:// -vv
Something went wrong with that request. Please try again.