import socket

 import subprocess

 import os

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

 server.bind(("0.0.0.0",8000))

 server.listen(5)

 print("start to listen".center(30,"-"))

 while True:

     conn,client_addr = server.accept()

     print(conn,client_addr)

     while True:

         try:

             data = conn.recv(1024)

             print("receive from client :",data)

             if (data.decode()).startswith("get"):

                 data_cmd = data.decode()

                 data_cmd_list = data_cmd.split(" ")

                 file_name = data_cmd_list[-1]

                 conn.send(str(os.path.getsize(file_name)).encode())

                 f = open(file_name,"rb")

                 f_data = f.readlines()

                 for line in f_data:

                     conn.send(line)

             elif (data.decode()).startswith("put"):

                 data_size = conn.recv(1024)

                 if data_size.decode() == "no file":

                     continue

                 print("The file's size is %sM" % round(int(data_size.decode()) / 1024 / 1024, 2))

                 data_list = (data.decode()).split(" ")

                 file_name = data_list[-1]

                 f = open(file_name, "wb")

                 total_size = int(data_size.decode())

                 file_size = 0

                 while True:

                     data2 = conn.recv(1024)

                     f.write(data2)

                     file_size += len(data2)

                     if file_size == total_size:

                         break

                 f.close()

                 print("file upload done")

             else:

                 res_obj = subprocess.Popen(data,shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE)

                 res = res_obj.stdout.read()

                 conn.send(str(len(res)).encode())

                 print("--res len :",len(res))

                 conn.send(res)

         except ConnectionResetError as e:

             print(client_addr,"is break")

             break

         except FileNotFoundError as e:

             print("there is no such file!")

             conn.send(b"no file")

             continue

 import socket

 import os

 client = socket.socket()

 client.connect(("192.168.168.128",8000))

 # client.connect(("localhost",8000))

 while True:

     try:

         msg = input(">>>>>").strip()

         if len(msg) == 0: continue

         client.send(msg.encode())

         if msg.startswith("get"):

             data = client.recv(1024)

             if data.decode() == "no file":

                 print("there is no such file!")

                 continue

             else:

                 print("The file's size is %sM" % round(int(data.decode())/1024/1024,2))

                 msg_list = msg.split(" ")

                 file_name = msg_list[-1]

                 f = open(file_name,"wb")

                 total_size = int(data.decode())

                 file_size = 0

                 while True:

                     data2 = client.recv(1024)

                     f.write(data2)

                     file_size += len(data2)

                     if file_size == total_size:

                         break

                 f.close()

         elif msg.startswith("put"):

             msg_cmd_list = msg.split(" ")

             file_name = msg_cmd_list[-1]

             client.send(str(os.path.getsize(file_name)).encode())

             f = open(file_name, "rb")

             f_data = f.readlines()

             for line in f_data:

                 client.send(line)

         else:

             data = client.recv(1024)

             print("client receive:", data.decode())

             total_size = int(data.decode())

             received_size = 0

             res = b""

             while received_size < total_size:

                 d = client.recv(1024)

                 res += d

                 received_size += len(d)

             print("-----receive done-----")

             print(res.decode())

     except FileNotFoundError as e:

         print("There is no such file!")

         client.send(b"no file")

         continue