下载文件
客户端
# -*- coding:utf-8 -*-
__author__ = ‘shisanjun‘

import socket
import json
import os
host=("127.0.0.1",9000)
client=socket.socket()

client.connect(host)

while True:
    cmd_str=input("请输入命令>>").strip()
    if len(cmd_str)==0:continue
    cmd_list=cmd_str.split()

    if cmd_list[0]=="put":
        if len(cmd_list)==1:
            print("not find put filename")
        else:
            filename=cmd_list[1]
            if os.path.isfile(filename):
                file_obj=open(filename,‘rb‘)
                filename2=filename.split("/")[-1]
                print(filename2)
                data_stat="%s %s" %(filename2,os.path.getsize(filename))
                data={
                    "filename":filename2,
                    "filesize":os.path.getsize(filename)
                }
                client.send(json.dumps(data).encode("utf-8"))
                for line in file_obj:
                    client.send(line)
                file_obj.close()
            else:
                print("can not find file")
    elif cmd_list[0]=="get":
        pass

服务器端
# -*- coding:utf-8 -*-
__author__ = ‘shisanjun‘


import socket
import json
host=("127.0.0.1",9000)
server=socket.socket()

server.bind(host)
server.listen(5)

while True:
    conn,addr=server.accept()

    data=conn.recv(4096)
    print(data.decode("utf-8"))
    data_dict=json.loads(data.decode("utf-8"))
    filename=data_dict.get("filename")
    f=open(filename,"wb")
    recesize=0
    while recesize<data_dict.get("filesize"):
        recefile=conn.recv(4096)
        f.write(recefile)
        recesize+=len(recefile)
    f.close()