# -*- coding: utf-8 -*-

import socket
import sys


def send_file(file_name):
    try:
        with open(file_name, 'rb') as f:
            content = f.read()
    except:
        print("没有下载的文件:%s" % file_name)


def main():
    # 一段代码，不太理解
    if len(sys.argv) != 2:
        print("请按照如下方式运行:python xx.py 7890")
        return
    else:
        # 运行方式正确的
        port = int(sys.argv[1])
    tcp_server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    tcp_server.bind(("", 8080))
    tcp_server.listen(128)
    while Ture:
        tcp_client, tcp_addr = tcp_server.accept()
        file_name = tcp_client.recv(1024).decode("gbk")
        print("对方(%s)请求下载的文件名为：%s" % (tcp_addr, file_name)
        content = send_file(file_name)
        if content:
            tcp_client.send(content)
        else:
            print("没有该文件")
        tcp_client.close()


if __name__ == "__main__":
    main()