关于tornado文件上传与存储

#!/usr/bin/python
#-*- encoding:utf-8 -*-
import tornado.ioloop
import tornado.web
import shutil
import os

class UploadFileHandler(tornado.web.RequestHandler):
    def get(self):
        self.write('''

  
  
    

    

    
    
  

''')

    def post(self):
        upload_path=os.path.join(os.path.dirname(__file__),'files')  #文件的暂存路径(在py文件同目录下创一个files文件夹来存储)
        file_metas=self.request.files['file']    #提取表单中‘name’为‘file’的文件元数据(一个文件元包括:[{'body':' XXX', 'content_type':'XXXX', 'filename':'XXXX'}])
        for meta in file_metas:
            filename=meta['filename']
            filepath=os.path.join(upload_path,filename)
            with open(filepath,'wb') as up:      #有些文件需要已二进制的形式存储，实际中可以更改(注意学习with ... as 关键词的用法)
                up.write(meta['body'])
            self.write('finished!')

app=tornado.web.Application([
    (r'/file',UploadFileHandler),
])

if __name__ == '__main__':
    app.listen(3000)
    tornado.ioloop.IOLoop.instance().start()