网络设备管理(广播点名机制)

1、采用的方案，资源

1)Flask-SocketIO

https://github.com/miguelgrinberg/Flask-SocketIO

2）python-socketio-client

https://github.com/veo-labs/python-socketio-client

3) nodejs client

https://github.com/socketio/socket.io-client

4）jquery渲染(文本/字符串)

<!DOCTYPE HTML>
<html>
<head>
<script type="text/javascript" src="jquery-1.11.2.js"></script>
<script type="text/javascript">
    $(function(){
        $("#testAjax").click(function(){
              htmlobj=$.ajax({url:"tmp.txt",async:false});
              $("#myDiv").html(htmlobj.responseText.replace(/\n/g,"<br/>"));
         });
    });
</script>    
</head>
    <body>
        <div id="myDiv"><h2>AJAX test</h2></div>
        <button id="testAjax" type="button">Ajax test</button>
    </body>
</html>
linux
$("#myDiv").html(htmlobj.responseText.replace(/\n/g,"<br/>"));
windows
$("#myDiv").html(htmlobj.responseText.replace(/\r\n/g,"<br/>")

linux/windows都支持需要处理一下

<!DOCTYPE HTML>
<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.11.2.min.js"></script>
<script type="text/javascript">
    $(function(){
        $("#testAjax").click(function(){
              htmlobj=$.ajax({url:"tmp",async:false});
                var i; 
                var result = "";
                var c; 
                for (i = 0; i < htmlobj.responseText.length; i++) {
                    c = htmlobj.responseText.substr(i, 1);
                    if ( c == "\n")
                        result = result + "</br>";
                    else if (c != "\r")
                        result = result + c;
                 }
              $("#myDiv").html(result);
         });
    });
</script>    
</head>
    <body>
        <div id="myDiv"><h2>AJAX test </h2></div>
        <button id="testAjax" type="button">Ajax test</button>
    </body>
</html>

 

2）架构分析

七拼八凑，就实现了远程设备管理(广播点名机制)，如图片中的admin——proxy server —— client ，看起来似乎内容涉及很多，但是每个模块实现的核心代码也就10来20行，完全实现功能也就50行左右吧。

 

admin实例是Flask-SocketIO中的网页模板，proxy server实例也就是Flask-SocketIO，client实例是python-socketio-client

client实例是运行在终端设备上的，可以是其他各种平台程序，比如c, python, nodejs等等

1)python client

https://pypi.org/project/python-socketio-client/1.1/

pip install python-socketio-client

from socketio_client.manager import Manager
import commands
import gevent
from gevent import monkey
monkey.patch_socket()

import logging
logging.basicConfig(level=logging.WARNING)

dev_id = '13210000'

#connect server
io = Manager('http', 'localhost', 5000, auto_connect=False)
chat = io.socket('/test')

@chat.on('test_event')
def test_message(message):
    #print(message)
        
    if message['id'] == dev_id:

        if message['data'] == 'gps':
            output = {'lat':0,'lon':0}
        elif message['data'] == 'battery':
            output = {'battery':0}
        else:
            return_code, output = commands.getstatusoutput(message['data'])

    print(output)
    chat.emit('ehco_event', {'id': message['id'],'data': output})

@chat.on_connect()
def on_connect():
    chat.emit('ehco_event', {'id': dev_id,'data': 'connected'})

chat.connect()
gevent.wait()

python调用shell

https://www.cnblogs.com/snow-backup/p/5035792.html

socket client还有些其他库

https://github.com/invisibleroads/socketIO-client

https://github.com/ziyasal/socket.io-python-emitter

https://github.com/abourget/gevent-socketio/tree/master/examples/flask_chat

 

2) nodejs client

https://github.com/socketio/socket.io-client

npm install socket.io-client

var socket = require('socket.io-client')('http://192.168.29.134:5000/test');

const dev_id = '13210000'

socket.on('connect', function(){
    console.log("connect");
    socket.emit('ehco_event', {data: 'connected'});
});

socket.on('client_event', function(data){
    console.log(data);
    if(data.id === dev_id){
        if(data.data === 'battery')
            socket.emit('my_event', {id: dev_id, data: 'return data ok ...'});
        else if(data.data === 'gps')
            socket.emit('my_event', {id: dev_id, data: 'return data ok ...'});
        else if(data.data === 'shell')
            socket.emit('my_event', {id: dev_id, data: 'return data ok ...'});
    }
});

socket.on('disconnect', function(){
    console.log("disconnect");
    socket.emit('ehco_event', {data: 'disconnect'});
});

nodejs调用shell指令

http://www.ruanyifeng.com/blog/2015/05/command-line-with-node.html

 

3、其他参考设计

https://github.com/pallets/flask

https://github.com/heroku-python/flask-sockets

https://github.com/miguelgrinberg/flasky

posted @ 2018-10-08 15:41  dong1  阅读(279)  评论(0)  编辑  收藏  举报