Using an Ajax request

Python

@app.route('/_stuff', methods= ['GET'])

def stuff():

    cpu=round(getCpuLoad())

    ram=round(getVmem())

    disk=round(getDisk())

    return jsonify(cpu=cpu, ram=ram, disk=disk)

Javascript

function update_values() {

            $SCRIPT_ROOT = {{ request.script_root|tojson|safe }};

            $.getJSON($SCRIPT_ROOT+/_stuff,

                function(data) {

                    $(#cpuload).text(data.cpu+ %)

                    $(#ram).text(data.ram+ %)

                    $(#disk).text(data.disk+ %)

                });

        }

Using Websockets

project/app/views/request/websockets.py

# -*- coding: utf-8 -*-



# OS Imports

import json



# Local Imports

from app import sockets

from app.functions import get_cpu_load, get_disk_usage, get_vmem



@sockets.route('/_socket_system')

def socket_system(ws):

    

    Returns the system informations, JSON Format

    CPU, RAM, and Disk Usage

    

    while True:

        message = ws.receive()

        if message == update:

            cpu = round(get_cpu_load())

            ram = round(get_vmem())

            disk = round(get_disk_usage())

            ws.send(json.dumps(dict(received=message, cpu=cpu, ram=ram, disk=disk)))

        else:

            ws.send(json.dumps(dict(received=message)))

project/app/__init__.py

# -*- coding: utf-8 -*-

from flask import Flask

from flask_sockets import Sockets





app = Flask(__name__)

sockets = Sockets(app)

app.config.from_object('config')

from app import views

Using Flask-Websockets made my life a lot easier. Here is the launcher :
launchwithsockets.sh

#!/bin/sh



gunicorn -k flask_sockets.worker app:app

Finally, here is the client code :

custom.js

The code is a bit too long, so here it is.

Note that I'm NOT using things like socket.io, that's why the code is long. This code also tries to reconnect to the server periodically, and can stop trying to reconnect on a user action. I use the Messenger lib to notify the user that something went wrong. Of course it's a bit more complicated than using socket.io but I really enjoyed coding the client side.