1.服务端

import  os
import json
import socketserver

class MyTCPHandler(socketserver.BaseRequestHandler):
    def put(self, *args):
        cmd_dic = args[0]
        filename = cmd_dic["filename"]
        filesize = cmd_dic["size"]
        if os.path.isfile(filename):
            f = open(filename + ".new", "wb")
        else:
            f = open(filename, "wb")
        self.request.send(b"200 ok")
        received_size = 0
        while received_size < filesize:
            data = self.request.recv(1024)
            f.write(data)
            received_size += len(data)
        else:
            f.close()
            print("file [%s] has uploaded..." % filename)


    def handle(self):
        while True:
            try:
                self.data = self.request.recv(1024).strip()
                print("{} wrote".format(self.client_address[0]))
                print(self.data)
                cmd_dic = json.loads(self.data.decode())
                action =cmd_dic["action"]
                if hasattr(self, action):
                    func = getattr(self, action)
                    func(cmd_dic)
            except ConnectionResetError as e:
                print("error", e)
                break

if __name__=="__main__":
    HOST, PORT = "0.0.0.0", 22222
    server = socketserver.ThreadingTCPServer((HOST, PORT), MyTCPHandler)
    server.serve_forever()

2.客户端

import socket, os
import json

class FtpClient(object):
    def __init__(self):
        self.client = socket.socket()
    def connect(self, ip, port):
        self.client.connect((ip, port))
    def interactive(self):
        while True:
            cmd = input(">>:").strip()
            if len(cmd) == 0: continue
            cmd_str = cmd.split()[0]
            if hasattr(self, "cmd_%s" % cmd_str):
                func = getattr(self, "cmd_%s" % cmd_str)
                func(cmd)
            else:
                self.help()
    def help(self):
        msg = """
        ls
        pwd
        cd
        get filename
        wget filename
        """

    def cmd_put(self, *args):
        cmd_split = args[0].split()
        if len(cmd_split) > 1:
            filename = cmd_split[1]
            if os.path.isfile(filename):
                filesize = os.stat(filename).st_size
                msg_dic = {
                    "action": "put",
                    "filename": filename,
                    "size": filesize,
                    "overridden": True
                }
                self.client.send(json.dumps(msg_dic).encode("utf-8"))
                #防止粘包，等服务器确认
                server_response = self.client.recv(1024)
                f = open(filename, "rb")
                for line in f:
                    self.client.send(line)
                else:
                    print("file upload success...")
                    f.close()

            else:
                print(filename, "is not exist")
    def cmd_wget(self):
        pass


ftp = FtpClient()
ftp.connect("localhost", 22222)
ftp.interactive()

3.使用

put filename