python基础之socket编程(二)

ssh远程执行命令:

思路分析:

客户端给服务端发送命令，服务端返回一个输出结果传给客户端.

#coding:utf-8
#买手机
import socket
import struct
import json
import subprocess
phone=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
#绑定电话卡
ip_port=('192.168.16.114',8081)
phone.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
phone.bind(ip_port)
#开机
phone.listen(5)
#等待电话

#链接循环
while True:
    conn,addr=phone.accept()
    print('client addr',addr)
    #通讯循环
    while True:
        try:
            cmd=conn.recv(1024)
            res=subprocess.Popen(cmd.decode('utf-8'),
                             shell=True,
                             stdout=subprocess.PIPE,
                             stderr=subprocess.PIPE)
            out_res=res.stdout.read()
            err_res=res.stderr.read()
            data_size=len(out_res)+len(err_res)
            head_dic={'data_size':data_size}
            head_json=json.dumps(head_dic)
            head_bytes=head_json.encode('utf-8')

            #part1:先发报头的长度
            head_len=len(head_bytes)
            conn.send(struct.pack('i',head_len))
            #part2:再发送报头
            conn.send(head_bytes)
            #part3:最后发送数据部分
            conn.send(out_res)
            conn.send(err_res)

        except Exception:
            break

    conn.close()
phone.close()

服务端

# 买手机
import socket
import struct
import json
phone = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# 拨通电话
# ip_port = ('127.0.0.1', 8080)
ip_port = ('192.168.16.114', 8081)
phone.connect(ip_port)
# 通信循环
while True:
    # 发消息
    cmd = input('>>: ').strip()
    if not cmd: continue
    phone.send(bytes(cmd, encoding='utf-8'))

    # part1:先收报头的长度
    head_struct=phone.recv(4)
    head_len=struct.unpack('i',head_struct)[0]

    # part2:再收报头
    head_bytes=phone.recv(head_len)
    head_json=head_bytes.decode('utf-8')

    head_dic=json.loads(head_json)
    print(head_dic)
    data_size = head_dic['data_size']

    #part3：收数据
    recv_size = 0
    recv_data = b''
    while recv_size < data_size:
        data = phone.recv(1024)
        recv_size += len(data)
        recv_data += data

    print(recv_data.decode('utf-8'))
phone.close()

客户端