python subprocess 小例子

#服务端import socketimport osimport subprocessphone = socket.socket(socket.AF_INET, socket.SOCK_STREAM)print('进行绑定，监听')phone.bind(('127.0.0.1', 8080))phone.listen(5)

def cmd(cmdlist):    obj=subprocess.Popen(        cmdlist,        shell=True,        stdout=subprocess.PIPE,        stderr=subprocess.PIPE    )

    stdout_res=obj.stdout.read()    stderr_res=obj.stderr.read()

    return stdout_res+stderr_res#假如不写成方法，这里可以分成两次发送过去，更加节省内存

while True:    conn, add = phone.accept()    print('建立连接')

    while True:        try:            msg = conn.recv(1024)            if not len(msg):                break

            print('执行命令')            print(msg)            #os.system(msg.decode(encoding='utf-8'))

            stdout_res=cmd(msg.decode(encoding='utf-8'))            print('发送消息')            conn.send(stdout_res)        except Exception:            break

    conn.close()phone.close()

#客户端

import socket

st = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

st.connect(('127.0.0.1', 8080))while True:    msg=input('请输入cmd 命令').strip()    print('发送消息')    if not len(msg):continue

    st.send(msg.encode(encoding='utf-8'))    data=st.recv(1024)    print(data.decode('gbk'))

st.close()

#服务端

# import socketserver### class Myhandler(socketserver.BaseRequestHandler):#     def Hadler(self):#         print('连接建立成功')#         while True:#             try:#                 data = self.request.recv(1024)#                 if not len(data): break#                 self.request.send(data)##             except ConnectionResetError:#                 break##         self.request.close()### if __name__ == '__main__':#     print('开始启动')#     st = socketserver.ThreadingTCPServer(('127.0.0.1', 8080), Myhandler, bind_and_activate=True)#     print('开始建立连接')#     st.serve_forever()  # 提供无限循环，循环建立链接#     # 每建立链接，就会启动一个线程，专门与刚刚#     # 建立好的链接做通信循环#     # 调用myhandler类产生一个对象，条用该对象下的handler方法，专门与刚刚建立好的#     # 连接做通信循环

import socketserverimport jsonimport structimport subprocessimport os

class MyHandler(socketserver.BaseRequestHandler):    def handle(self):        # 通信循环        while True:            try:                cmd = self.request.recv(1024)                if len(cmd) == 0:                    break                else:                    cmd = cmd.decode(encoding='utf-8')

                if cmd == 'get':                    path = 'file.txt'                    if not os.path.exists(path):                        raise ValueError('没有文件')                    total_size = os.path.getsize(filename=path)                    print(total_size)                    import hashlib                    with open(path, 'rb') as f:                        for line in f:                            line                    hashlib_value = 'xxxx'                else:                    obj = subprocess.Popen(cmd,                                           shell=True,                                           stdout=subprocess.PIPE,                                           stderr=subprocess.PIPE)                    s_out = obj.stdout.read()                    s_err = obj.stderr.read()                    total_size = len(s_out) + len(s_err)                    path = None                    hashlib_value = '你大爷'

                header_dic = {                    'file_name': path,                    'total_size': total_size,                    'hashlib': hashlib_value                }                header_json = (json.dumps(header_dic)).encode(encoding='utf-8')                header_len = struct.pack('i', len(header_json))                print('header_len:%s' % header_len)

                # print(header_len)                self.request.send(header_len)                # print(header_json)                self.request.send(header_json)

                if cmd == 'get':                    with open(path, 'rb') as f:                        for line in f:                            # print(line)                            self.request.send(line)                else:                    # print('cmd')                    self.request.send(s_out)                    self.request.send(s_err)

            except ConnectionResetError:                break

        self.request.close()

if __name__ == "__main__":    s = socketserver.ThreadingTCPServer(('127.0.0.1', 8080), MyHandler, bind_and_activate=True)    s.serve_forever()

#客户端

# from socket import *## socket_client = socket(AF_INET, SOCK_STREAM)# print('进行连接')# socket_client.connect(('127.0.0.1', 8080))# print('连接成功')# while True:#     msg = input('请输入')#     if not len(msg): continue#     socket_client.send(msg.encode(encoding='utf-8'))#     data =socket_client.recv(1024)#     print(data.decode(encoding='utf-8'))## socket_client.close()

import socket, struct, json, hashlib

st = socket.socket(socket.AF_INET, socket.SOCK_STREAM)st.connect(('127.0.0.1', 8080))

def get_file(st):    data = st.recv(4)    print(data)    data = struct.unpack('i', data)[0]    header_json = json.loads((st.recv(data)).decode('utf-8'))    print(header_json)    file_down = b''    encodeing = None    while header_json['total_size'] > 0:        msg = st.recv(1024)        header_json['total_size'] -= len(msg)        file_down += msg        try:            if encodeing == None:                print(msg.decode(encoding='utf-8'))            else:                print(msg.decode(encodeing='gbk'))        except Exception:            encodeing == False            print(msg.decode(encoding='gbk'))

    return file_down

while True:

    msg = input('请输入').strip()    if not len(msg): continue    try:        st.send(msg.encode('utf-8'))        file_down = get_file(st)

        if msg == 'get':            with open('save.txt', 'wb') as f:                f.write(file_down)            print('end')

    except ConnectionResetError:        break

st.close()