Question

我是Flask的新手，我想知道我们是否可以运行与Flask应用程序并行运行的不同类的不同进程。我的代码结构与此非常相似：

from flask import Flask, render_template, flash, request, jsonify
from flask_socketio import SocketIO, emit
from flask_wtf import FlaskForm
from wtforms import *
import multiprocessing as mp
import os
import serial
import time, datetime

# App config.
app = Flask(__name__)
app.config.from_object(__name__)
app.config['SECRET_KEY'] = '7d441f27d441f27567d441f2b6176a'
app.config['DEBUG'] = True

#turn the flask app into a socketio app
socketio = SocketIO(app)

class serial_read_Process():

    def __init__(self):
        self.delay = 0.2
        self.port = serial.Serial ( port='/dev/ttyTHS2', baudrate=115200, 
                                    parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE,
                                    bytesize=serial.EIGHTBITS, timeout=1)

    def serial_read (self):
        # read UART and process the incoming serial data and send it to webpage
        currtime = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
        socketio.emit('values', {'data1':data1, 'currtime':currtime}, namespace='/serial')
        time.sleep(self.delay)

class ProcessWebPageData():

    def __init__(self, name):
        self.person_name = name
        self.delay = 0.2

    def process_data(self):
        # process the data received from the webpage
        time.sleep(self.delay)


@socketio.on('my_event', namespace='/test')
def test_message(message):
    name_val= message.get('name')   
    ProcessDataObj = ProcessWebPageData()
    process2 = mp.Process(target=ProcessDataObj.process_data, args=(name_val,)) # For Processing the data received from the web page
    if not process2.is_alive():
        thread2.daemon = True
        thread2.start()


@app.route("/", methods=['GET', 'POST'])
def load():
    return render_template('index.html')


@socketio.on('connect', namespace='/test')
def test_connect():
    print('Client connected')
    uart_read = serial_read_Thread()
    process1 = mp.Process(target=uart_read.serial_read) # For Reading UART values
    process1.daemon = True
    if not process1.is_alive():
        process1.start()
        print("process started")

if __name__== "__main__":
    socketio.run(app)

当我在serial_read函数中打印那些值时，我不断从UART获取值，我看到它们正在打印。我在通过socketio.emit（）发送的网页上看不到它们。我有一个Javascript代码，可以在其中接收值并使用它在HTML网页上显示。这也是正确的方法吗？任何输入将不胜感激。 TIA。

Python Flask SocketIO多处理不同的类函数

0 个答案: