Is there a way to set an uploaded file size limit in tornado?

Question

I am using tornado to make an image processing RESTful service, which is accepting images uploaded by general HTTP means like multipart/form-data. I then access them in handlers using self.request.files.

It could be that an adversary will try to upload a huge file to break down a service. Is there any way to tell tornado an uploaded file size limit, exceeding which file should be discarded and error HTTP status should be set?

Answer 1

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()