Python Websocket-client

websocket

websocket is web protocol used to send/push data between server/client. It’s built on TCP, it works well with HTTP, it uses the same port 80 and 443 as HTTP. The reason websocket is there, server use websocket to push info to client which http can not. More details

In python, there exists two project, one is websocket-client, one is websockets. Pay attention to the name and ensure websocket-client module is this article talking about.

installation

pip install websocket-client

simple example to send message

create_connection is the one you should choose to use in such case, don’t use WebSocketApp for such simple purpose https://github.com/websocket-client/websocket-client/blob/master/examples/echo_client.py

You can add proxy, ssl config, customized header as json.

from __future__ import print_function
import websocket
imort ssl

if __name__ == "__main__":
    # will display details screen output for debug
    websocket.enableTrace(True)

    http_proxy_host = "Zscaler.proxy.corporate.com"
    http_proxy_port = 80

    header = {
            'predix-zone-id': "tsZoneID",
            'Authorization': 'Bearer accessToken',
            'content-type': 'application/json'
        }

    ws = websocket.create_connection("ws://echo.websocket.org/",
                                     http_proxy_host=http_proxy_host,
                                     http_proxy_port=http_proxy_port,
                                     sslopt={"cert_reqs": ssl.CERT_NONE},
                                     header=header
                                    )
    print("Sending 'Hello, World'...")
    ws.send("Hello, World")    # json.dumps(jsonObj)
    print("Sent")
    print("Receiving...")
    result = ws.recv()
    print("Received '%s'" % result)
    ws.close()

simple application example

https://github.com/websocket-client/websocket-client/blob/master/examples/echoapp_client.py

simple example to use websocket.WebSocket

Not sure the relation to the create_connection

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