# 实例化SSHClient
ssh = paramiko.SSHClient()
# 当远程服务器没有本地主机的密钥时自动添加到本地，这样不用在建立连接的时候输入yes或no进行确认
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
# 连接SSH服务器，这里以账号密码的方式进行认证，也可以用key
ssh.connect(hostname=host, port=port, username=username, password=password, timeout=8)
# 打开ssh通道，建立长连接
transport = ssh.get_transport()
self.ssh_channel = transport.open_session()
# 获取ssh通道，并设置term和终端大小
self.ssh_channel.get_pty(term=term, width=cols, height=rows)
# 激活终端，这样就可以正常登陆了
self.ssh_channel.invoke_shell()

while not self.ssh_channel.exit_status_ready():
 # SSH返回的数据需要转码为utf-8，否则json序列化会失败
 data = self.ssh_channel.recv(1024).decode('utf-8','ignore')
 if len(data) != 0:
 message = {'flag': 'success', 'message': data}
 self.websocket.send(json.dumps(message))
 else:
 break

import io
import json
import paramiko
from threading import Thread
from channels.generic.websocket import WebsocketConsumer
from cmdb.backends.sshargs import args
class SSHBridge(object):
 def __init__(self, websocket):
 self.websocket = websocket
 def connect(self, host, port, username, authtype, password=None, pkey=None, term='xterm', cols=80, rows=24):
 ssh = paramiko.SSHClient()
 ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
 try:
 if authtype == 2:
 pkey = paramiko.RSAKey.from_private_key(io.StringIO(pkey))
 ssh.connect(username=username, hostname=host, port=port, pkey=pkey, timeout=8)
 else:
 ssh.connect(hostname=host, port=port, username=username, password=password, timeout=8)
 except Exception as e:
 message = json.dumps({'flag': 'error', 'message': str(e)})
 self.websocket.send(message)
 return False
 # 打开一个ssh通道并建立连接
 transport = ssh.get_transport()
 self.ssh_channel = transport.open_session()
 self.ssh_channel.get_pty(term=term, width=cols, height=rows)
 self.ssh_channel.invoke_shell()
 # 连接建立一次，之后交互数据不会再进入该方法
 for i in range(2):
 recv = self.ssh_channel.recv(1024).decode('utf-8', 'ignore')
 message = json.dumps({'flag': 'success', 'message': recv})
 self.websocket.send(message)
 def close(self):
 try:
 self.websocket.close()
 self.ssh_channel.close()
 except BaseException as e:
 pass
 def _ws_to_ssh(self, data):
 try:
 self.ssh_channel.send(data)
 except OSError as e:
 self.close()
 def _ssh_to_ws(self):
 try:
 while not self.ssh_channel.exit_status_ready():
 data = self.ssh_channel.recv(1024).decode('utf-8', 'ignore')
 if len(data) != 0:
 message = {'flag': 'success', 'message': data}
 self.websocket.send(json.dumps(message))
 else:
 break
 except Exception as e:
 message = {'flag': 'error', 'message': str(e)}
 self.websocket.send(json.dumps(message))
 self.close()
 def shell(self, data):
 Thread(target=self._ws_to_ssh, args=(data,)).start()
 Thread(target=self._ssh_to_ws).start()
class SSHConsumer(WebsocketConsumer):
 def connect(self):
 self.pk = self.scope['url_route']['kwargs'].get('id')
 self.query = self.scope.get('query_string')
 self.user = self.scope['user']
 self.accept()
 # ssh_connect_args为SSH连接需要的参数
 ssh_connect_args = args(self.pk, self.user, self.query)
 self.ssh = SSHBridge(websocket=self)
 self.ssh.connect(**ssh_connect_args)
 def disconnect(self, close_code):
 self.ssh.close()
 def receive(self, text_data=None):
 text_data = json.loads(text_data)
 self.ssh.shell(data=text_data.get('data', ''))

def resize_pty(self, cols, rows):
 self.ssh_channel.resize_pty(width=cols, height=rows)

def receive(self, text_data=None):
 text_data = json.loads(text_data)
 if text_data.get('flag') == 'resize':
 self.ssh.resize_pty(cols=text_data['cols'], rows=text_data['rows'])
 else:
 self.ssh.shell(data=text_data.get('data', ''))

function terminal_size() {
 return {
 cols: Math.floor($('#terminal').width() / 9),
 rows: Math.floor($(window).height() / 17),
 }
}

// terminal resize
$(window).resize(function () {
 let cols = terminal_size().cols;
 let rows = terminal_size().rows;
 send_data = JSON.stringify({
 'flag': 'resize',
 'cols': cols,
 'rows': rows
 });
 socket.send(send_data);
 term.resize(cols, rows)
})