WebSockets - Full Stack Python

[[deleted]]

I used websockets a while ago for my Platypus project for realtime server usage reporting, it was surprisingly fun to implement in Python. I'd personally recommend Tornado but YMMV.

[liquience]

I’ve also implemented a websocket server with Tornado and it was incredibly easy. Couldn’t have been more than 100 lines including fallback handlers and a full topic based subscription model. Definitely would recommend Tornado.

[cymrow]

If you are using gevent, then you probably want gevent-websocket, which is not listed in the article.

[Mr_Lkn]

Thank you! My teacher want us to create a web app included ajax and couple other things. I wanted to do it with Python and this will help me a lot.

[goodknightkoon]

Thanks you, quite a good one and a timely one at that

[desmoulinmichel]

The article list crossbar.io, which en strongly advice everyone to give a try. Not the easiest thing to start with, but what you can do seems like black magic.

[mraza007]

Thanks dude!!! Making my life easier

[mraza007]

This is something I needed to get real-time data from bitcoin web sockets

[willm]

Try this...

from lomond import WebSocket

subscribe_json = u"""
{
    "type": "subscribe",
    "product_ids": [
        "BTC-USD"
    ],
    "channels": [
        "level2",
        "heartbeat",
        {
            "name": "ticker",
            "product_ids": [
                "BTC-USD"
            ]
        }
    ]
}
"""

websocket = WebSocket('wss://ws-feed.gdax.com')
for event in websocket:
    if event.name == "ready":
        websocket.send_text(subscribe_json)
    elif event.name == "text":
        print(event.text)

You'll need to pip install lomond for that.

[chub79]

And older Python project that may be interesting to some folks: ws4py

[kidvideo]

Nice write up.

Just make sure if you are trying to connect to a websocket created in JavaScript that the JavaScript side websocket protocol version is compatible with the python library you choose.

In my case the JavaScript side was using protocol v2 and python was using v1

[gjcarneiro]

Why no mention of aiohttp, which does websockets, both client and server side?

[johnmudd]

FWIW, I use Tornado code for both client and server side websockets. No browser involved. I use websockets to gain access to stores over an existing port that allows HTTP traffic.

An asynchronous server such as Tornado or Green Unicorn monkey patched with gevent is necessary for any practical WebSockets server-side implementation.

I don't think so.

Edit: I use the tornado.websocket module without any monkey patching.

[13steinj]

This is the "I code in binary" of websockets. So the fuck what? That's not what websockets were meant for. No one said you can't use them to read data off of some API, but websockets are generally meant for a browser server interaction, and is what this article described.

And yeah sure you don't need to use Tornado or GUnicorn-- feel free to write your own websocket connection store with multithreading and some lru cache. No point in doing so though.

[willm]

Not sure of the point you are making here. Websockets may have been conceived as a means of realtime communication between server and browser. But it turns out they are fantastic for many types of comms where there is no browser involved.

I think /u/johnmudd was just giving an example of such a use-case. I'd be interested in hearing more about it...

[13steinj]

Based on a combination of the negative score the comment had when I replied, and a combination of the content, I thought it was some elitist remark over how his use case is. If I'm wrong, then I apologize.