详解基于django实现的webssh简单例子

2019-11-25 14:19:06

字体：大中小

来源：转载

供稿：网友

本文介绍了详解基于django实现的webssh简单例子，分享给大家，具体如下：

说明

新建一个 django 程序，本文为 chain。

以下仅为简单例子，实际应用可根据自己平台情况进行修改。

打开首页后，需要输入1，后台去登录主机，然后返回登录结果。

正常项目可以post 主机和登录账户，进行权限判断，然后去后台读取账户密码，进行登录。

djang后台

需要安装以下模块

安装后会有一个版本号报错，不影响

channels==2.0.2channels-redis==2.1.0amqp==1.4.9anyjson==0.3.3asgi-redis==1.4.3asgiref==2.3.0async-timeout==2.0.0attrs==17.4.0cd /tmp/wget https://files.pythonhosted.org/packages/12/2a/e9e4fb2e6b2f7a75577e0614926819a472934b0b85f205ba5d5d2add54d0/Twisted-18.4.0.tar.bz2tar xf Twisted-18.4.0.tar.bz2cd Twisted-18.4.0python3 setup.py install

启动redis

chain/    chain/       settings.py       asgi.py       consumers.py       routing.py  templates/      index.html

settings.py

# django-channels配置CHANNEL_LAYERS = {  "default": {    "BACKEND": "channels_redis.core.RedisChannelLayer",    "CONFIG": {      "hosts": [("127.0.0.1", 6379)],    },  },}# 配置ASGIASGI_APPLICATION = "chain.routing.application"

consumers.py

from asgiref.sync import async_to_syncfrom channels.generic.websocket import WebsocketConsumerimport paramikoimport threadingimport timefrom channels.layers import get_channel_layerchannel_layer = get_channel_layer()class MyThread(threading.Thread):  def __init__(self, id, chan):    threading.Thread.__init__(self)    self.chan = chan  def run(self):    while not self.chan.chan.exit_status_ready():      time.sleep(0.1)      try:        data = self.chan.chan.recv(1024)        async_to_sync(self.chan.channel_layer.group_send)(          self.chan.scope['user'].username,          {            "type": "user.message",            "text": bytes.decode(data)          },        )      except Exception as ex:        print(str(ex))    self.chan.sshclient.close()    return Falseclass EchoConsumer(WebsocketConsumer):  def connect(self):    # 创建channels group， 命名为：用户名，并使用channel_layer写入到redis    async_to_sync(self.channel_layer.group_add)(self.scope['user'].username, self.channel_name)    # 返回给receive方法处理    self.accept()  def receive(self, text_data):    if text_data == '1':      self.sshclient = paramiko.SSHClient()      self.sshclient.load_system_host_keys()      self.sshclient.set_missing_host_key_policy(paramiko.AutoAddPolicy())      self.sshclient.connect('47.104.140.38', 22, 'root', '123456')      self.chan = self.sshclient.invoke_shell(term='xterm')      self.chan.settimeout(0)      t1 = MyThread(999, self)      t1.setDaemon(True)      t1.start()    else:      try:        self.chan.send(text_data)      except Exception as ex:        print(str(ex))  def user_message(self, event):    # 消费    self.send(text_data=event["text"])  def disconnect(self, close_code):    async_to_sync(self.channel_layer.group_discard)(self.scope['user'].username, self.channel_name)

asgi.py

import osimport djangofrom channels.routing import get_default_applicationos.environ.setdefault("DJANGO_SETTINGS_MODULE", "chain.settings")django.setup()application = get_default_application()routing.pyfrom channels.auth import AuthMiddlewareStackfrom channels.routing import URLRouter, ProtocolTypeRouterfrom django.urls import pathfrom .consumers import EchoConsumerapplication = ProtocolTypeRouter({  "websocket": AuthMiddlewareStack(    URLRouter([      path(r"ws/", EchoConsumer),      # path(r"stats/", StatsConsumer),    ])  )})

网页设置：

index.html

<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <title>django webssh 例子</title>  <link href="/static/css/plugins/ztree/awesomeStyle/awesome.css" rel="external nofollow" rel="stylesheet">  <link href="/static/webssh_static/css/xterm.min.css" rel="external nofollow" rel="stylesheet" type="text/css"/>  <style>    body {      padding-bottom: 30px;    }    .terminal {      border: #000 solid 5px;      font-family: cursive;    {#        font-family: Arial, Helvetica, Tahoma ,"Monaco", "DejaVu Sans Mono", "Liberation Mono", sans-serif;#}{#        font-family: Tahoma, Helvetica, Arial, sans-serif;#}{#        font-family: "/5B8B/4F53","","Monaco", "DejaVu Sans Mono", "Liberation Mono", "Microsoft YaHei", monospace;#} font-size: 15px;    {#        color: #f0f0f0;#} background: #000;    {#        width: 893px;#}{#        height: 550px;#} box-shadow: rgba(0, 0, 0, 0.8) 2px 2px 20px;    }    .reverse-video {      color: #000;      background: #f0f0f0;    }  </style></head><body><div id="terms"></div></body><script src="/static/webssh_static/js/xterm.min.js"></script><script>  var socket = new WebSocket('ws://' + window.location.host + '/ws/');  socket.onopen = function () {    var term = new Terminal();    term.open(document.getElementById('terms'));    term.on('data', function (data) {      console.log(data);      socket.send(data);    });    socket.onmessage = function (msg) {      console.log(msg);      console.log(msg.data);      term.write(msg.data);    };    socket.onerror = function (e) {      console.log(e);    };    socket.onclose = function (e) {      console.log(e);      term.destroy();    };  };</script></html>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。

上一篇：Flask框架各种常见装饰器示例

下一篇：Python爬虫之网页图片抓取的方法