详解基于django实现的webssh简单例子
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==2.0.2 channels-redis==2.1.0 amqp==1.4.9 anyjson==0.3.3 asgi-redis==1.4.3 asgiref==2.3.0 async-timeout==2.0.0 attrs==17.4.0 cd /tmp/ wget https://files.pythonhosted.org/packages/12/2a/e9e4fb2e6b2f7a75577e0614926819a472934b0b85f205ba5d5d2add54d0/Twisted-18.4.0.tar.bz2 tar xf Twisted-18.4.0.tar.bz2 cd Twisted-18.4.0 python3 setup.py install
启动redis
目录
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ASGI
ASGI_APPLICATION = "chain.routing.application"
consumers.py
from asgiref.sync import async_to_sync
from channels.generic.websocket import WebsocketConsumer
import paramiko
import threading
import time
from channels.layers import get_channel_layer
channel_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 False
class 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 os
import django
from channels.routing import get_default_application
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "chain.settings")
django.setup()
application = get_default_application()
routing.py
from channels.auth import AuthMiddlewareStack
from channels.routing import URLRouter, ProtocolTypeRouter
from django.urls import path
from .consumers import EchoConsumer
application = 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【听图阁-专注于Python设计】。
