使用tornado 框架上传文件时限制大小

I've tried this, It works! max_buffer_size default value is 100 M.

import tornado.httpserver

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

server = tornado.httpserver.HTTPServer(app, max_buffer_size=10485760000)  # 10G
server.listen(8888)
tornado.ioloop.IOLoop.instance().start()