python websocket-client connection

参考：https://pypi.python.org/pypi/websocket-client/    https://www.cnblogs.com/saryli/p/6702260.html

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://echo.websocket.org/",
                              on_message = on_message,
                              on_error = on_error,
                              on_close = on_close)
    ws.on_open = on_open
    ws.run_forever()

Short-lived one-off send-receive

This is if you want to communicate a short message and disconnect immediately when done.

from websocket import create_connection
ws = create_connection("ws://echo.websocket.org/")
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

from websocket import create_connection
ws = create_connection("ws://echo.websocket.org/",
                        sockopt=((socket.IPPROTO_TCP, socket.TCP_NODELAY),))

More advanced: Custom class

You can also write your own class for the connection, if you want to handle the nitty-gritty details yourself.

from websocket import create_connection, WebSocket
class MyWebSocket(WebSocket):
    def recv_frame(self):
        frame = super().recv_frame()
        print('yay! I got this frame: ', frame)
        return frame
 
ws = create_connection("ws://echo.websocket.org/",
                        sockopt=((socket.IPPROTO_TCP, socket.TCP_NODELAY),), class_=MyWebSocket)

FAQ

How to disable ssl cert verification?

Please set sslopt to {“cert_reqs”: ssl.CERT_NONE}.

WebSocketApp sample

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

create_connection sample

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

WebSocket sample

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

How to disable hostname verification.

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

WebSocketApp sample

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

create_connection sample

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

WebSocket sample

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

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

ws = websocket.create_connection("ws://exapmle.com/websocket", subprotocols=["binary", "base64"])

wsdump.py

wsdump.py is simple WebSocket test(debug) tool.

sample for echo.websocket.org:

$ wsdump.py ws://echo.websocket.org/
Press Ctrl+C to quit
> Hello, WebSocket
< Hello, WebSocket
> How are you?
< How are you?

Usage

usage:

wsdump.py [-h] [-v [VERBOSE]] ws_url

WebSocket Simple Dump Tool

positional arguments:

ws_url websocket url. ex. ws://echo.websocket.org/

optional arguments:

-h, --help

show this help message and exit

WebSocketApp

-v VERBOSE, --verbose VERBOSE

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