socket练习--ssh

服务器端：

# -*-coding:utf-8-*-
# Author:sunhao
 
import socket
import os
 
server = socket.socket()
 
ip_port = ('127.0.0.1',6969)
 
server.bind(ip_port)
 
server.listen()
 
while True:
 
    conn,f = server.accept()
    print("new connect:",f)
 
    while True:
        print("等待新指令")
 
        data = conn.recv(1024)
        if not data:
            print("客户端断开")
 
            break
        print("执行指令",data)
 
        res = os.popen(data.decode()).read()
 
        print("before send",len(res.encode()))
 
        if len(res) == 0:
            res = "cmd has bo output"
 
        conn.send(str(len(res.encode())).encode('utf-8'))   #先发数据大小给客户端    会发生粘包
 
        client_ack=conn.recv(1024)         #解决粘包
 
        conn.send(res.encode("utf-8"))
 
        print("send done")
 
server.close()

　　

 客户端：

# -*-coding:utf-8-*-
# Author:sunhao
 
import socket
 
client = socket.socket()
ip_port = ('127.0.0.1',6969)
 
client.connect(ip_port)
 
print("连接开始")
while True:
 
    command = input(">>>:").strip()
 
    if len(command) == 0:
        continue
 
    client.send(command.encode("utf-8"))
 
    cmd_res_size=client.recv(1024)  #接受命令结果的长度
 
    print("命令结果的大小",cmd_res_size)
 
    client.send("准备好接收了".encode('utf-8'))   #解决粘包
 
    recived_size=0
    recived_data=b''
 
    while recived_size < int(cmd_res_size.decode()):
 
        print("----------",cmd_res_size.decode())
        print("##############", type(cmd_res_size.decode()))
 
        data=client.recv(1024)
 
        print("&&&&&&&&&&",len(data))
 
        recived_size += len(data)  #每次收到的有可能小于1024 所以用len判断
        recived_data += data
 
    else:
 
        print("cmd recive done",recived_size)
 
        print(recived_data.decode())
 
client.close()