服务端代码

import socket


# 创建tcp服务套接字
def main():
    tcp_server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    tcp_server_socket_for_file_name = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    print("1.套接字创建完毕...") 
    # 绑定端口号
    tcp_server_socket.bind(("",40000))
    tcp_server_socket_for_file_name.bind(("",50000))
    print("2.端口绑定完毕")
    # 转为被动模式

    tcp_server_socket.listen(128)
    tcp_server_socket_for_file_name.listen(128)
    print("3.被动模式转换完毕")
    # 接收到新的连接则创建服务套接字

    client_socket, client_addr = tcp_server_socket.accept()
    client_socket_for_file_name, client_addr_for_file_name = tcp_server_socket_for_file_name.accept()
    print("4.拆包完毕....")
    file_name = client_socket_for_file_name.recv(1024)
    print("接收到的file_name为:%s"%file_name)
    file_name = file_name.decode("utf-8")
    f = open(file_name,"wb+")

    while True:
        content = client_socket.recv(50)
        if (content):
            print("准备写入",content)
            f.write(content)
            print("已经写入",content)

        else:
            f.close()
            break
    print("执行完成")
if __name__ == "__main__":
    main()

客户端代码

import socket
import os

g_the_dir_list = list()

# 显示目录
def display_dir():
    print("当前目录为:")
    for i, the_dir in enumerate(g_the_dir_list):
        print(i, the_dir)

def main():
    global g_the_dir_list
    # 读取当前目录下文件列表
    g_the_dir_list = os.listdir(os.getcwd())

    # 创建客户端socket
    client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # 创建第二个socket(负责发送文件名)
    client_socket_for_file_name = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    # 建立连接
    server_ip = input("请输入服务端ip(占用端口40000与50000)")
    client_socket.connect((server_ip, 40000))
    client_socket_for_file_name.connect((server_ip, 50000))

    # 显示当前目录下文件列表
    display_dir()

    file_index = int(input("请输入需要传送的文件序号:"))
    # 打开文件并通过socket.send发送
    client_socket_for_file_name.send(g_the_dir_list[file_index].encode("utf-8"))
    f = open(g_the_dir_list[file_index], "rb")
    while True: 
        content = f.read(1024)
        if (content):
            client_socket.send(content)
        else:
            print("发送完毕！")
            f.close()
            break
if __name__ == "__main__":
    main()