/
server.py
executable file
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/
server.py
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#!/usr/bin/env python
import os
import threading
import atexit
import copy
from random import random
from flask import Flask, render_template, request, jsonify
HOST = "0.0.0.0"
PORT = 8000
POLL_TIME = 1
current_data = {}
lock = threading.Lock()
poll_thread = None
def read_data():
return read_data_faux()
TEMP_RANGE = 5
POWER_RANGE = 10
CURRENT_RANGE = 20
def read_data_faux():
data = copy.copy(current_data)
if not 'temp' in data:
data['temp'] = 30.0
if not 'power' in data:
data['power'] = 5.0
if not 'current' in data:
data['current'] = 5.0
data['temp'] += random() * TEMP_RANGE - (TEMP_RANGE / 2.0)
data['current'] += random() * CURRENT_RANGE - (CURRENT_RANGE / 2.0)
data['power'] += random() * POWER_RANGE - (POWER_RANGE / 2.0)
data['temp'] = max(0, data['temp'])
data['current'] = max(0, data['current'])
data['power'] = max(0, data['power'])
return data
def create_app():
app = Flask(__name__,
static_url_path = "/static",
static_folder = "static",
template_folder = "template")
app.config['SECRET_KEY'] = 'lazers are kewl'
def interrupt():
global poll_thread
if poll_thread:
poll_thread.cancel()
def poll_data():
global poll_thread
global current_data
lock.acquire()
current_data = read_data()
lock.release()
poll_thread = threading.Timer(POLL_TIME, poll_data, ())
poll_thread.start()
def poll_start():
global poll_thread
poll_thread = threading.Timer(POLL_TIME, poll_data, ())
poll_thread.start()
poll_start()
atexit.register(interrupt)
return app
app = create_app()
@app.route('/')
def index():
return render_template('index.html')
@app.route('/api/data')
def data():
lock.acquire()
data = copy.copy(current_data)
lock.release()
return jsonify(data)
if __name__ == '__main__':
def cancel_thread():
if poll_thread:
poll_thread.cancel()
atexit.register(cancel_thread)
app.run(host=HOST, port=PORT, debug=False)