Flask app route for paths that start with X

Question

I am a beginner with Flask and python. I want to create a handler function for paths that start with "/favicon". For example the following should be handled:

/favicon
/faviconFOO
/favicon_bar
/favicon/buzz
/favicon1337

The following should not be handled:

/favico
/favicoN
/whatever

If Flask supporeted wildcards, it would be "/favicon*"

EDIT: I don't need support for regular expressions.

How can I do this?

You want all routes: `favicon`, `faviconFOO`, `favicon_bar` etc. to point same handle, then you may look at this [thread](https://stackoverflow.com/questions/5870188/does-flask-support-regular-expressions-in-its-url-routing) — ZdaR, Oct 17 '17 at 07:18
I would not say it's a duplicate because it is much more spesific than the other question. Besides, I don't care if it is solved using regex or not. — Mr. Developerdude, Oct 17 '17 at 07:21
It can be perfectly solved with regex, I guess it would be the best way to reduce redundancy in this case(flask). However Django framework has more convenient support for regexs'. — ZdaR, Oct 17 '17 at 07:31
please let me know if the answer did what you wanted if you found another way to do it. — senaps, Oct 17 '17 at 11:05

senaps · Accepted Answer · 2020-08-25T07:33:56.727

I would do a catch-all url and then, try to use a wildcard with it from inside the view:

@app.route('/<path:text>', methods=['GET', 'POST'])
def all_routes(text):
    if text.startswith('favicon'):
        #do stuff
    else:
        return redirect(url_for('404_error'))

you can use string too:

@app.route('/<string:text>', methods=['GET'])

but using string wouldn't catch / strings. so if string is used, url's containing something like favicon/buzz wouldn't be cached by it, path in the other hand would catch /'s too. so you should go with first option.

you can look at routing documentation in flask site. and you should create a better conditional than if x in Y because it will fail if you were passed something like /thingfavicon

Flask app route for paths that start with X

1 Answers1