import subprocess

res = subprocess.Popen("dir",

                       shell=True,

                       stderr=subprocess.PIPE,

                       stdout=subprocess.PIPE

                       )

ret = res.stdout.read().decode("gbk")

print(ret)

import struct

res = struct.pack("i",6465789)　　#"q"，8个字节

print(res)  #b'\xfd\xa8b\x00'

print(len(res)) #

ret = struct.unpack("i",res)

print(ret)   #(6465789,)

print(ret[0])   #

import subprocess

import socket

import struct

server = socket.socket()

server.bind(("127.0.0.1",8101))

server.listen(5)

while 1:

    conn,addr = server.accept()

    while 1:

        try:

            server_cmd = conn.recv(1024).decode("utf8")

            res = subprocess.Popen(server_cmd,

                                   shell=True,

                                   stderr=subprocess.PIPE,

                                   stdout=subprocess.PIPE

                                   )

            if server_cmd == b"exit":

                break

            response1 = res.stdout.read()

            response2 = res.stderr.read()

            if response2:

                pack = struct.pack("i",(len(response2)))

                conn.send(pack)

                conn.send(response2)

            else:

                pack = struct.pack("i",(len(response1)))

                conn.send(pack)

                conn.send(response1)

        except Exception as e:

            break

    conn.close()

import socket

import struct

client = socket.socket()

client.connect(("127.0.0.1",8101))

while 1:

    client_cmd = input("请输入您的命令:")

    client.send(client_cmd.encode("utf8"))

    if client_cmd == "exit":

        break

    if client_cmd == "":

        continue

    pack = client.recv(4)

    print(pack)

    data_length = struct.unpack("i",pack)[0]

    print(data_length)

    recv_data_length = 0

    recv_data = b""

    while recv_data_length < data_length:

        data = client.recv(1024)

        recv_data_length += len(data)

        recv_data += data

    print(recv_data.decode("gbk"))

client.close()