#!/usr/bin/env python
# -*- coding:utf-8 -*-

import tornado.ioloop
import tornado.web


class MainHandler(tornado.web.RequestHandler):

    def get(self):
        filename = self.get_argument('filename')
        # http头 浏览器自动识别为文件下载
        self.set_header('Content-Type', 'application/octet-stream')
        # 下载时显示的文件名称
        self.set_header('Content-Disposition', 'attachment; filename=%s'%filename)
        with open(filename, 'rb') as f:
            while True:
                data = f.read(1024)
                if not data:
                    break
                self.write(data)
        # # 记得有finish哦
        self.finish()

def make_app():
    return tornado.web.Application([
        (r"/", MainHandler),
    ])

if __name__ == "__main__":
    app = make_app()
    app.listen(8888)
    tornado.ioloop.IOLoop.current().start()