tcp文件下载

服务器端

 import socket

 def send_file_2_client(new_client_socket,client_addr):
     # 接收信息
     file_name = new_client_socket.recv(1024).decode("utf-8")

     print("客户%s要下载的文件是：%s" % (str(client_addr), file_name))

     # 定义发送的内容
     send_content = None

     # 打开文件
     try:
         f = open(file_name,"rb")
         send_content = f.read()
         f.close()
     except Exception as ret:
         print("没有该文件信息")

     # 不做判断 如果没有该文件会报错：TypeError: a bytes-like object is required, not 'NoneType'
     if send_content:
         new_client_socket.send(send_content)

 def main():
     # 创建套接字
     tcp_server_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

     # 绑定端口
     tcp_server_socket.bind(("",7788))

     # 被动监听
     tcp_server_socket.listen(128)

     while True:
         # 接收客户端信息
         new_client_socket,client_addr = tcp_server_socket.accept()

         # while True:
         send_file_2_client(new_client_socket,client_addr)

         # 关闭
         new_client_socket.close()
     # 关闭套接字
     tcp_server_socket.close()

客户端

import socket

def main():
    # 创建
    tcp_client_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

    # 连接服务器
    # ip和port可以写死 也可以用input() 输入
    server_ip = input("请输入服务器IP：")
    server_port = int(input("请输入端口："))
    tcp_client_socket.connect((server_ip,server_port))

    # 发送信息
    file_name = input("请输入要下载的文件名：")
    tcp_client_socket.send(file_name.encode("utf-8"))

    # 接收对方发来的数据
    recv_data = tcp_client_socket.recv(1024)
    print(recv_data)
    if recv_data:
        with open("[接收]" + file_name,"wb") as f:
            f.write(recv_data)

    # 关闭套接字
    tcp_client_socket.close()