Python - Tornado : How to return 404 instead 500 for favicon

Question

Everytime i run my code in Chrome. It returns two request. Second is favicon.ico

But Favicon.ico's content type is text/html and status is 500

How can i change its status to 404

i dont have favicon.ico and i dont want to

500 is server internal error. – GingerPlusPlus Mar 11 '16 at 08:36 — GingerPlusPlus, Mar 11 '16 at 08:36

score 3 · Accepted Answer · edited May 23 '17 at 12:08

You are getting 500, probably because /favicon.ico matches different route (e.g. with template without required params).

@Daniel B. answer is ok, (some) browsers won't request favicon - complete info can be found at How to prevent favicon.ico requests?. Additionally I would add ErrorHandler route to server 404.

import tornado.ioloop
import tornado.web

class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello, world")

def make_app():
    return tornado.web.Application([
        (r"/favicon.ico", tornado.web.ErrorHandler, {'status_code': 404}),
        (r".*", MainHandler),
    ])

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

There are also apple-*ico requested by Apple devices, you may want to send 404 as well.

Thanks for reply. This helps me a lot.Because if i dont have a html file and the answer below couldn't help me.Thanks again i wish i could upvote but i cant — Arda Nalbant, Mar 11 '16 at 13:06

score 2 · Answer 2 · answered Mar 11 '16 at 08:35

2

Not sure why you get a 500, but if you don't want a favicon at all maybe you could add an empty one to your htmls head?

<link rel="shortcut icon"type="image/x-icon" href="data:image/x-icon;,">

answered Mar 11 '16 at 08:35

Daniel B.

929
4
8

Thanks but i dont have a html file.Because i only render files with their mime types so no html.But thanks again – Arda Nalbant Mar 11 '16 at 13:07

Python - Tornado : How to return 404 instead 500 for favicon

2 Answers2