Link to Flask static files with url_for

Question

How do you use url_for in Flask to reference a file in a folder? For example, I have some static files in the static folder, some of which may be in subfolders such as static/bootstrap.

When I try to serve a file from static/bootstrap, I get an error.

 <link rel=stylesheet type=text/css href="{{ url_for('static/bootstrap', filename='bootstrap.min.css') }}">

I can reference files that aren't in subfolders with this, which works.

 <link rel=stylesheet type=text/css href="{{ url_for('static', filename='bootstrap.min.css') }}">

What is the correct way to reference static files with url_for? How do I use url_for to generate urls to static files at any level?

Answer 1

In my case I had special instruction into nginx configuration file:

location ~ \.(js|css|png|jpg|gif|swf|ico|pdf|mov|fla|zip|rar)$ {
            try_files $uri =404;
    }

All clients have received '404' because nginx nothing known about Flask.

The primary configuration file is /etc/nginx/nginx.conf on Linux. It may be similar on Windows.