python learn socket ---ssh

Write a simplified version of ssh using Scoket

Server:

 1 #！usr/bin/env python 2 #-*-coding:utf-8-*- 3 # Author calmyan 4  5 import socket,os 6  7 s=socket.socket()#实例化一个 socket 8  9 s.bind(('localhost',9100))#绑定一个监听端口10 11 s.listen(5)#监听列表 5 个12 print('监听中...')13 while True:14     conn,addr=s.accept()#监听到新的接连15     print('连接到新的地址:',addr)16     while True:17         data=conn.recv(4092)#接收数据18         if not data:#如果收的数据为空19             print('客户端已经断开!')20             break21         print('指令:',data.decode())22         cmd_res=os.popen(data.decode()).read()#读取数据,指令23         #cmd_res_l=len(cmd_res.encode('utf-8'))#数据大小24 25         if len(cmd_res)==0:26             cmd_res='指令错误!'27             continue28         #conn.recv(1)29         conn.send(str(len(cmd_res.encode('utf-8'))).encode('utf-8') )#发送数据的大小30         #print(len(cmd_res))31         clinet_ack=conn.recv(1024)#为了去粘包32 33         conn.send(cmd_res.encode('utf-8'))#发送指令34         #print(cmd_res.encode('utf-8'))35         print('发送完毕!')36 else:37     s.close()

Client:

 1 #！usr/bin/env python 2 #-*-coding:utf-8-*- 3 # Author calmyan 4 import socket 5 c=socket.socket()#实例化一个socket 6  7 c.connect(('localhost',9100))#客户端连联 8 while True: 9     cho=input('指令:').strip()10     if len(cho)==0:continue11     c.send(cho.encode('utf-8'))#发送数据12     cmd_res_size=c.recv(1024)#接收数据 数据大小13     print('数据大小:',cmd_res_size)14     size_l=0#收数据当前大小15     c.send('确认!'.encode('utf-8'))#为了去粘包16     while size_l< int(cmd_res_size.decode()):17         data=c.recv(1024)#开始接收数据18         size_l+=len(data)#加上19         print(data.decode())20         print(size_l)21     else:22         print('接收完毕',size_l)

Under win10, the ipconfig command will error when recv(1024), and other commands are not found for the time being

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