flask + websocket消息订阅
Flask-SocketIO使Flask应用程序能够在客户端clients 和服务器server之间实现低延迟的全双工通信。 客户端应用程序可以使用JavaScript，C ++，Java和Swift中的任何SocketIO官方客户端库或任何兼容的客户端来建立到服务器的永久连接。
安装
pip install flask-socketio
flask项目接入步骤
1、flask启动文件中 添加websocket配置
方便个人我直接配置在了启动文件中，大家可以将配置单独提出去，规范代码结构，当前仅做参考。
代码中 <code># websocket配置内容 .... # websocket</code>
from datetime import timedelta
# websocket配置内容
from flask import Flask, render_template, request
from flask_socketio import SocketIO, emit
# websocket
from flask_script import Manager
from apps import create_cms_app
from apps.model import db
# 配置初始化文件
app = create_cms_app("apps.settings.DevCMSConfig")
app.permanent_session_lifetime = timedelta(minutes=60 * 24)
# websocket配置内容
socketio = SocketIO()
socketio.init_app(app)
name_space = '/io'
@socketio.on('recevice message', namespace=name_space)
def test_message(message):
print('recevice message', message)
# emit('message', {'data': message['data']})
@socketio.on('connect', namespace=name_space)
def connected_msg():
"""客户端连接"""
print('client connected!', request.sid)
socketio.emit('abcde', 'hello', namespace=name_space)
@socketio.on('disconnect', namespace=name_space)
def disconnect_msg():
"""客户端离开"""
print('client disconnected!')
@app.route('/push')
def push_once():
event_name = request.args.get("name")
data = request.args.get("msg")
broadcasted_data = {'data': data}
print("publish msg==>", broadcasted_data)
socketio.emit(event_name, broadcasted_data, broadcast=True, namespace=name_space)
return 'send msg successful!'
# websocket
@app.route('/monitor')
def monitor():
"""加载接收消息页面"""
return render_template('monitor.html')
if __name__ == '__main__':
socketio.run(app)
2、前端数据接收 <code>monitor.html</code>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Socket Demo</title>
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport"
content="width=device-width,user-scalable=yes, minimum-scale=0.4, initial-scale=0.8,target-densitydpi=low-dpi"/>
<script type="text/javascript" src="//cdn.bootcss.com/jquery/3.1.1/jquery.min.js"></script>
<script type="text/javascript" src="//cdn.bootcss.com/socket.io/1.5.1/socket.io.min.js"></script>
</head>
<body>
<div id='monit'>
</div>
<div id='monit1'>
</div>
</body>
<script>
$(document).ready(function () {
namespace = '/io';
var socket = io.connect(location.protocol + '//' + document.domain + ':' + location.port + namespace);
socket.on('message', function (res) {
console.log(res.data)
var t = res.data;
if (t) {
{#$("#t").append(t).append('<br/>');#}
$("#monit").html(t);
}
});
socket.on('message2', function (res) {
console.log(res.data)
var t = res.data;
if (t) {
{#$("#t").append(t).append('<br/>');#}
$("#monit1").html(t);
}
});
});
</script>
</html>
3、Python脚本接入-- <code>模拟消息推送</code>
import requests, time, random
from multiprocessing import Process
def push_msg(msg, name):
html = requests.get("http://127.0.0.1:5000/push?msg=%s&name=%s" % (msg, name))
print(html.text)
if __name__ == '__main__':
# 模拟推送多条消息
re = []
re2 = []
for i in range(1, 100):
p1 = Process(target=push_msg, args=('--------------' + str(i), 'message'))
re.append(p1)
for i in range(1, 100):
p2 = Process(target=push_msg, args=('--------------' + str(i), 'message2'))
re2.append(p2)
e = re + re2
random.shuffle(e)
for i in e:
time.sleep(1)
i.start()
